cam_xpt.c revision 68084
1/* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/sys/cam/cam_xpt.c 68084 2000-10-31 17:59:43Z gibbs $ 30 */ 31#include <sys/param.h> 32#include <sys/bus.h> 33#include <sys/systm.h> 34#include <sys/types.h> 35#include <sys/malloc.h> 36#include <sys/kernel.h> 37#include <sys/time.h> 38#include <sys/conf.h> 39#include <sys/fcntl.h> 40#include <sys/md5.h> 41#include <sys/devicestat.h> 42#include <sys/interrupt.h> 43 44#ifdef PC98 45#include <pc98/pc98/pc98_machdep.h> /* geometry translation */ 46#endif 47 48#include <sys/ipl.h> 49 50#include <cam/cam.h> 51#include <cam/cam_ccb.h> 52#include <cam/cam_periph.h> 53#include <cam/cam_sim.h> 54#include <cam/cam_xpt.h> 55#include <cam/cam_xpt_sim.h> 56#include <cam/cam_xpt_periph.h> 57#include <cam/cam_debug.h> 58 59#include <cam/scsi/scsi_all.h> 60#include <cam/scsi/scsi_message.h> 61#include <cam/scsi/scsi_pass.h> 62#include "opt_cam.h" 63 64/* Datastructures internal to the xpt layer */ 65 66/* 67 * Definition of an async handler callback block. These are used to add 68 * SIMs and peripherals to the async callback lists. 69 */ 70struct async_node { 71 SLIST_ENTRY(async_node) links; 72 u_int32_t event_enable; /* Async Event enables */ 73 void (*callback)(void *arg, u_int32_t code, 74 struct cam_path *path, void *args); 75 void *callback_arg; 76}; 77 78SLIST_HEAD(async_list, async_node); 79SLIST_HEAD(periph_list, cam_periph); 80static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 81 82/* 83 * This is the maximum number of high powered commands (e.g. start unit) 84 * that can be outstanding at a particular time. 85 */ 86#ifndef CAM_MAX_HIGHPOWER 87#define CAM_MAX_HIGHPOWER 4 88#endif 89 90/* number of high powered commands that can go through right now */ 91static int num_highpower = CAM_MAX_HIGHPOWER; 92 93/* 94 * Structure for queueing a device in a run queue. 95 * There is one run queue for allocating new ccbs, 96 * and another for sending ccbs to the controller. 97 */ 98struct cam_ed_qinfo { 99 cam_pinfo pinfo; 100 struct cam_ed *device; 101}; 102 103/* 104 * The CAM EDT (Existing Device Table) contains the device information for 105 * all devices for all busses in the system. The table contains a 106 * cam_ed structure for each device on the bus. 107 */ 108struct cam_ed { 109 TAILQ_ENTRY(cam_ed) links; 110 struct cam_ed_qinfo alloc_ccb_entry; 111 struct cam_ed_qinfo send_ccb_entry; 112 struct cam_et *target; 113 lun_id_t lun_id; 114 struct camq drvq; /* 115 * Queue of type drivers wanting to do 116 * work on this device. 117 */ 118 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 119 struct async_list asyncs; /* Async callback info for this B/T/L */ 120 struct periph_list periphs; /* All attached devices */ 121 u_int generation; /* Generation number */ 122 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 123 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 124 /* Storage for the inquiry data */ 125 struct scsi_inquiry_data inq_data; 126 u_int8_t inq_flags; /* 127 * Current settings for inquiry flags. 128 * This allows us to override settings 129 * like disconnection and tagged 130 * queuing for a device. 131 */ 132 u_int8_t queue_flags; /* Queue flags from the control page */ 133 u_int8_t serial_num_len; 134 u_int8_t *serial_num; 135 u_int32_t qfrozen_cnt; 136 u_int32_t flags; 137#define CAM_DEV_UNCONFIGURED 0x01 138#define CAM_DEV_REL_TIMEOUT_PENDING 0x02 139#define CAM_DEV_REL_ON_COMPLETE 0x04 140#define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 141#define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 142#define CAM_DEV_TAG_AFTER_COUNT 0x20 143#define CAM_DEV_INQUIRY_DATA_VALID 0x40 144 u_int32_t tag_delay_count; 145#define CAM_TAG_DELAY_COUNT 5 146 u_int32_t refcount; 147 struct callout_handle c_handle; 148}; 149 150/* 151 * Each target is represented by an ET (Existing Target). These 152 * entries are created when a target is successfully probed with an 153 * identify, and removed when a device fails to respond after a number 154 * of retries, or a bus rescan finds the device missing. 155 */ 156struct cam_et { 157 TAILQ_HEAD(, cam_ed) ed_entries; 158 TAILQ_ENTRY(cam_et) links; 159 struct cam_eb *bus; 160 target_id_t target_id; 161 u_int32_t refcount; 162 u_int generation; 163 struct timeval last_reset; 164}; 165 166/* 167 * Each bus is represented by an EB (Existing Bus). These entries 168 * are created by calls to xpt_bus_register and deleted by calls to 169 * xpt_bus_deregister. 170 */ 171struct cam_eb { 172 TAILQ_HEAD(, cam_et) et_entries; 173 TAILQ_ENTRY(cam_eb) links; 174 path_id_t path_id; 175 struct cam_sim *sim; 176 struct timeval last_reset; 177 u_int32_t flags; 178#define CAM_EB_RUNQ_SCHEDULED 0x01 179 u_int32_t refcount; 180 u_int generation; 181}; 182 183struct cam_path { 184 struct cam_periph *periph; 185 struct cam_eb *bus; 186 struct cam_et *target; 187 struct cam_ed *device; 188}; 189 190struct xpt_quirk_entry { 191 struct scsi_inquiry_pattern inq_pat; 192 u_int8_t quirks; 193#define CAM_QUIRK_NOLUNS 0x01 194#define CAM_QUIRK_NOSERIAL 0x02 195#define CAM_QUIRK_HILUNS 0x04 196 u_int mintags; 197 u_int maxtags; 198}; 199#define CAM_SCSI2_MAXLUN 8 200 201typedef enum { 202 XPT_FLAG_OPEN = 0x01 203} xpt_flags; 204 205struct xpt_softc { 206 xpt_flags flags; 207 u_int32_t generation; 208}; 209 210static const char quantum[] = "QUANTUM"; 211static const char sony[] = "SONY"; 212static const char west_digital[] = "WDIGTL"; 213static const char samsung[] = "SAMSUNG"; 214static const char seagate[] = "SEAGATE"; 215static const char microp[] = "MICROP"; 216 217static struct xpt_quirk_entry xpt_quirk_table[] = 218{ 219 { 220 /* Reports QUEUE FULL for temporary resource shortages */ 221 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 222 /*quirks*/0, /*mintags*/24, /*maxtags*/32 223 }, 224 { 225 /* Reports QUEUE FULL for temporary resource shortages */ 226 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 227 /*quirks*/0, /*mintags*/24, /*maxtags*/32 228 }, 229 { 230 /* Reports QUEUE FULL for temporary resource shortages */ 231 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 232 /*quirks*/0, /*mintags*/24, /*maxtags*/32 233 }, 234 { 235 /* Broken tagged queuing drive */ 236 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 237 /*quirks*/0, /*mintags*/0, /*maxtags*/0 238 }, 239 { 240 /* Broken tagged queuing drive */ 241 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 242 /*quirks*/0, /*mintags*/0, /*maxtags*/0 243 }, 244 { 245 /* Broken tagged queuing drive */ 246 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 247 /*quirks*/0, /*mintags*/0, /*maxtags*/0 248 }, 249 { 250 /* 251 * Unfortunately, the Quantum Atlas III has the same 252 * problem as the Atlas II drives above. 253 * Reported by: "Johan Granlund" <johan@granlund.nu> 254 * 255 * For future reference, the drive with the problem was: 256 * QUANTUM QM39100TD-SW N1B0 257 * 258 * It's possible that Quantum will fix the problem in later 259 * firmware revisions. If that happens, the quirk entry 260 * will need to be made specific to the firmware revisions 261 * with the problem. 262 * 263 */ 264 /* Reports QUEUE FULL for temporary resource shortages */ 265 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 266 /*quirks*/0, /*mintags*/24, /*maxtags*/32 267 }, 268 { 269 /* 270 * 18 Gig Atlas III, same problem as the 9G version. 271 * Reported by: Andre Albsmeier 272 * <andre.albsmeier@mchp.siemens.de> 273 * 274 * For future reference, the drive with the problem was: 275 * QUANTUM QM318000TD-S N491 276 */ 277 /* Reports QUEUE FULL for temporary resource shortages */ 278 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 279 /*quirks*/0, /*mintags*/24, /*maxtags*/32 280 }, 281 { 282 /* 283 * Broken tagged queuing drive 284 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 285 * and: Martin Renters <martin@tdc.on.ca> 286 */ 287 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 288 /*quirks*/0, /*mintags*/0, /*maxtags*/0 289 }, 290 /* 291 * The Seagate Medalist Pro drives have very poor write 292 * performance with anything more than 2 tags. 293 * 294 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 295 * Drive: <SEAGATE ST36530N 1444> 296 * 297 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 298 * Drive: <SEAGATE ST34520W 1281> 299 * 300 * No one has actually reported that the 9G version 301 * (ST39140*) of the Medalist Pro has the same problem, but 302 * we're assuming that it does because the 4G and 6.5G 303 * versions of the drive are broken. 304 */ 305 { 306 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 307 /*quirks*/0, /*mintags*/2, /*maxtags*/2 308 }, 309 { 310 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 311 /*quirks*/0, /*mintags*/2, /*maxtags*/2 312 }, 313 { 314 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 315 /*quirks*/0, /*mintags*/2, /*maxtags*/2 316 }, 317 { 318 /* 319 * Slow when tagged queueing is enabled. Write performance 320 * steadily drops off with more and more concurrent 321 * transactions. Best sequential write performance with 322 * tagged queueing turned off and write caching turned on. 323 * 324 * PR: kern/10398 325 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 326 * Drive: DCAS-34330 w/ "S65A" firmware. 327 * 328 * The drive with the problem had the "S65A" firmware 329 * revision, and has also been reported (by Stephen J. 330 * Roznowski <sjr@home.net>) for a drive with the "S61A" 331 * firmware revision. 332 * 333 * Although no one has reported problems with the 2 gig 334 * version of the DCAS drive, the assumption is that it 335 * has the same problems as the 4 gig version. Therefore 336 * this quirk entries disables tagged queueing for all 337 * DCAS drives. 338 */ 339 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 340 /*quirks*/0, /*mintags*/0, /*maxtags*/0 341 }, 342 { 343 /* Broken tagged queuing drive */ 344 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 345 /*quirks*/0, /*mintags*/0, /*maxtags*/0 346 }, 347 { 348 /* Broken tagged queuing drive */ 349 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 350 /*quirks*/0, /*mintags*/0, /*maxtags*/0 351 }, 352 { 353 /* 354 * Broken tagged queuing drive. 355 * Submitted by: 356 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 357 * in PR kern/9535 358 */ 359 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 360 /*quirks*/0, /*mintags*/0, /*maxtags*/0 361 }, 362 { 363 /* 364 * Slow when tagged queueing is enabled. (1.5MB/sec versus 365 * 8MB/sec.) 366 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 367 * Best performance with these drives is achieved with 368 * tagged queueing turned off, and write caching turned on. 369 */ 370 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 371 /*quirks*/0, /*mintags*/0, /*maxtags*/0 372 }, 373 { 374 /* 375 * Slow when tagged queueing is enabled. (1.5MB/sec versus 376 * 8MB/sec.) 377 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 378 * Best performance with these drives is achieved with 379 * tagged queueing turned off, and write caching turned on. 380 */ 381 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 382 /*quirks*/0, /*mintags*/0, /*maxtags*/0 383 }, 384 { 385 /* 386 * Doesn't handle queue full condition correctly, 387 * so we need to limit maxtags to what the device 388 * can handle instead of determining this automatically. 389 */ 390 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 391 /*quirks*/0, /*mintags*/2, /*maxtags*/32 392 }, 393 { 394 /* Really only one LUN */ 395 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA*", "*" }, 396 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 397 }, 398 { 399 /* I can't believe we need a quirk for DPT volumes. */ 400 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 401 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 402 /*mintags*/0, /*maxtags*/255 403 }, 404 { 405 /* 406 * Many Sony CDROM drives don't like multi-LUN probing. 407 */ 408 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 409 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 410 }, 411 { 412 /* 413 * This drive doesn't like multiple LUN probing. 414 * Submitted by: Parag Patel <parag@cgt.com> 415 */ 416 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 417 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 418 }, 419 { 420 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 421 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 422 }, 423 { 424 /* 425 * The 8200 doesn't like multi-lun probing, and probably 426 * don't like serial number requests either. 427 */ 428 { 429 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 430 "EXB-8200*", "*" 431 }, 432 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 433 }, 434 { 435 /* 436 * These Hitachi drives don't like multi-lun probing. 437 * The PR submitter has a DK319H, but says that the Linux 438 * kernel has a similar work-around for the DK312 and DK314, 439 * so all DK31* drives are quirked here. 440 * PR: misc/18793 441 * Submitted by: Paul Haddad <paul@pth.com> 442 */ 443 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 444 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 445 }, 446 { 447 /* 448 * This old revision of the TDC3600 is also SCSI-1, and 449 * hangs upon serial number probing. 450 */ 451 { 452 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 453 " TDC 3600", "U07:" 454 }, 455 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 456 }, 457 { 458 /* 459 * Would repond to all LUNs if asked for. 460 */ 461 { 462 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 463 "CP150", "*" 464 }, 465 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 466 }, 467 { 468 /* 469 * Would repond to all LUNs if asked for. 470 */ 471 { 472 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 473 "96X2*", "*" 474 }, 475 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 476 }, 477 { 478 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 479 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 480 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 481 }, 482 { 483 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 484 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 485 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 486 }, 487 { 488 /* TeraSolutions special settings for TRC-22 RAID */ 489 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 490 /*quirks*/0, /*mintags*/55, /*maxtags*/255 491 }, 492 { 493 /* Default tagged queuing parameters for all devices */ 494 { 495 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 496 /*vendor*/"*", /*product*/"*", /*revision*/"*" 497 }, 498 /*quirks*/0, /*mintags*/2, /*maxtags*/255 499 }, 500}; 501 502static const int xpt_quirk_table_size = 503 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 504 505typedef enum { 506 DM_RET_COPY = 0x01, 507 DM_RET_FLAG_MASK = 0x0f, 508 DM_RET_NONE = 0x00, 509 DM_RET_STOP = 0x10, 510 DM_RET_DESCEND = 0x20, 511 DM_RET_ERROR = 0x30, 512 DM_RET_ACTION_MASK = 0xf0 513} dev_match_ret; 514 515typedef enum { 516 XPT_DEPTH_BUS, 517 XPT_DEPTH_TARGET, 518 XPT_DEPTH_DEVICE, 519 XPT_DEPTH_PERIPH 520} xpt_traverse_depth; 521 522struct xpt_traverse_config { 523 xpt_traverse_depth depth; 524 void *tr_func; 525 void *tr_arg; 526}; 527 528typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 529typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 530typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 531typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 532typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 533 534/* Transport layer configuration information */ 535static struct xpt_softc xsoftc; 536 537/* Queues for our software interrupt handler */ 538typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 539static cam_isrq_t cam_bioq; 540static cam_isrq_t cam_netq; 541 542/* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 543static SLIST_HEAD(,ccb_hdr) ccb_freeq; 544static u_int xpt_max_ccbs; /* 545 * Maximum size of ccb pool. Modified as 546 * devices are added/removed or have their 547 * opening counts changed. 548 */ 549static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 550 551struct cam_periph *xpt_periph; 552 553static periph_init_t xpt_periph_init; 554 555static periph_init_t probe_periph_init; 556 557static struct periph_driver xpt_driver = 558{ 559 xpt_periph_init, "xpt", 560 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 561}; 562 563static struct periph_driver probe_driver = 564{ 565 probe_periph_init, "probe", 566 TAILQ_HEAD_INITIALIZER(probe_driver.units) 567}; 568 569DATA_SET(periphdriver_set, xpt_driver); 570DATA_SET(periphdriver_set, probe_driver); 571 572#define XPT_CDEV_MAJOR 104 573 574static d_open_t xptopen; 575static d_close_t xptclose; 576static d_ioctl_t xptioctl; 577 578static struct cdevsw xpt_cdevsw = { 579 /* open */ xptopen, 580 /* close */ xptclose, 581 /* read */ noread, 582 /* write */ nowrite, 583 /* ioctl */ xptioctl, 584 /* poll */ nopoll, 585 /* mmap */ nommap, 586 /* strategy */ nostrategy, 587 /* name */ "xpt", 588 /* maj */ XPT_CDEV_MAJOR, 589 /* dump */ nodump, 590 /* psize */ nopsize, 591 /* flags */ 0, 592 /* bmaj */ -1 593}; 594 595static struct intr_config_hook *xpt_config_hook; 596 597/* Registered busses */ 598static TAILQ_HEAD(,cam_eb) xpt_busses; 599static u_int bus_generation; 600 601/* Storage for debugging datastructures */ 602#ifdef CAMDEBUG 603struct cam_path *cam_dpath; 604u_int32_t cam_dflags; 605u_int32_t cam_debug_delay; 606#endif 607 608/* Pointers to software interrupt handlers */ 609struct intrhand *camnet_ih; 610struct intrhand *cambio_ih; 611 612#if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 613#error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 614#endif 615 616/* 617 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 618 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 619 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 620 */ 621#if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 622 || defined(CAM_DEBUG_LUN) 623#ifdef CAMDEBUG 624#if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 625 || !defined(CAM_DEBUG_LUN) 626#error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 627 and CAM_DEBUG_LUN" 628#endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 629#else /* !CAMDEBUG */ 630#error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 631#endif /* CAMDEBUG */ 632#endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 633 634/* Our boot-time initialization hook */ 635static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 636 637static moduledata_t cam_moduledata = { 638 "cam", 639 cam_module_event_handler, 640 NULL 641}; 642 643static void xpt_init(void *); 644 645DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 646MODULE_VERSION(cam, 1); 647 648 649static cam_status xpt_compile_path(struct cam_path *new_path, 650 struct cam_periph *perph, 651 path_id_t path_id, 652 target_id_t target_id, 653 lun_id_t lun_id); 654 655static void xpt_release_path(struct cam_path *path); 656 657static void xpt_async_bcast(struct async_list *async_head, 658 u_int32_t async_code, 659 struct cam_path *path, 660 void *async_arg); 661static path_id_t xptnextfreepathid(void); 662static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 663static union ccb *xpt_get_ccb(struct cam_ed *device); 664static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 665 u_int32_t new_priority); 666static void xpt_run_dev_allocq(struct cam_eb *bus); 667static void xpt_run_dev_sendq(struct cam_eb *bus); 668static timeout_t xpt_release_devq_timeout; 669static timeout_t xpt_release_simq_timeout; 670static void xpt_release_bus(struct cam_eb *bus); 671static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 672 int run_queue); 673static struct cam_et* 674 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 675static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 676static struct cam_ed* 677 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 678 lun_id_t lun_id); 679static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 680 struct cam_ed *device); 681static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 682static struct cam_eb* 683 xpt_find_bus(path_id_t path_id); 684static struct cam_et* 685 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 686static struct cam_ed* 687 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 688static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 689static void xpt_scan_lun(struct cam_periph *periph, 690 struct cam_path *path, cam_flags flags, 691 union ccb *ccb); 692static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 693static xpt_busfunc_t xptconfigbuscountfunc; 694static xpt_busfunc_t xptconfigfunc; 695static void xpt_config(void *arg); 696static xpt_devicefunc_t xptpassannouncefunc; 697static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 698static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 699static void xptpoll(struct cam_sim *sim); 700static void camisr(void *); 701#if 0 702static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 703static void xptasync(struct cam_periph *periph, 704 u_int32_t code, cam_path *path); 705#endif 706static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 707 int num_patterns, struct cam_eb *bus); 708static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 709 int num_patterns, struct cam_ed *device); 710static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 711 int num_patterns, 712 struct cam_periph *periph); 713static xpt_busfunc_t xptedtbusfunc; 714static xpt_targetfunc_t xptedttargetfunc; 715static xpt_devicefunc_t xptedtdevicefunc; 716static xpt_periphfunc_t xptedtperiphfunc; 717static xpt_pdrvfunc_t xptplistpdrvfunc; 718static xpt_periphfunc_t xptplistperiphfunc; 719static int xptedtmatch(struct ccb_dev_match *cdm); 720static int xptperiphlistmatch(struct ccb_dev_match *cdm); 721static int xptbustraverse(struct cam_eb *start_bus, 722 xpt_busfunc_t *tr_func, void *arg); 723static int xpttargettraverse(struct cam_eb *bus, 724 struct cam_et *start_target, 725 xpt_targetfunc_t *tr_func, void *arg); 726static int xptdevicetraverse(struct cam_et *target, 727 struct cam_ed *start_device, 728 xpt_devicefunc_t *tr_func, void *arg); 729static int xptperiphtraverse(struct cam_ed *device, 730 struct cam_periph *start_periph, 731 xpt_periphfunc_t *tr_func, void *arg); 732static int xptpdrvtraverse(struct periph_driver **start_pdrv, 733 xpt_pdrvfunc_t *tr_func, void *arg); 734static int xptpdperiphtraverse(struct periph_driver **pdrv, 735 struct cam_periph *start_periph, 736 xpt_periphfunc_t *tr_func, 737 void *arg); 738static xpt_busfunc_t xptdefbusfunc; 739static xpt_targetfunc_t xptdeftargetfunc; 740static xpt_devicefunc_t xptdefdevicefunc; 741static xpt_periphfunc_t xptdefperiphfunc; 742static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 743#ifdef notusedyet 744static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 745 void *arg); 746#endif 747static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 748 void *arg); 749#ifdef notusedyet 750static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 751 void *arg); 752#endif 753static xpt_devicefunc_t xptsetasyncfunc; 754static xpt_busfunc_t xptsetasyncbusfunc; 755static cam_status xptregister(struct cam_periph *periph, 756 void *arg); 757static cam_status proberegister(struct cam_periph *periph, 758 void *arg); 759static void probeschedule(struct cam_periph *probe_periph); 760static void probestart(struct cam_periph *periph, union ccb *start_ccb); 761static void proberequestdefaultnegotiation(struct cam_periph *periph); 762static void probedone(struct cam_periph *periph, union ccb *done_ccb); 763static void probecleanup(struct cam_periph *periph); 764static void xpt_find_quirk(struct cam_ed *device); 765static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 766 struct cam_ed *device, 767 int async_update); 768static void xpt_toggle_tags(struct cam_path *path); 769static void xpt_start_tags(struct cam_path *path); 770static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 771 struct cam_ed *dev); 772static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 773 struct cam_ed *dev); 774static __inline int periph_is_queued(struct cam_periph *periph); 775static __inline int device_is_alloc_queued(struct cam_ed *device); 776static __inline int device_is_send_queued(struct cam_ed *device); 777static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 778 779static __inline int 780xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 781{ 782 int retval; 783 784 if (dev->ccbq.devq_openings > 0) { 785 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 786 cam_ccbq_resize(&dev->ccbq, 787 dev->ccbq.dev_openings 788 + dev->ccbq.dev_active); 789 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 790 } 791 /* 792 * The priority of a device waiting for CCB resources 793 * is that of the the highest priority peripheral driver 794 * enqueued. 795 */ 796 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 797 &dev->alloc_ccb_entry.pinfo, 798 CAMQ_GET_HEAD(&dev->drvq)->priority); 799 } else { 800 retval = 0; 801 } 802 803 return (retval); 804} 805 806static __inline int 807xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 808{ 809 int retval; 810 811 if (dev->ccbq.dev_openings > 0) { 812 /* 813 * The priority of a device waiting for controller 814 * resources is that of the the highest priority CCB 815 * enqueued. 816 */ 817 retval = 818 xpt_schedule_dev(&bus->sim->devq->send_queue, 819 &dev->send_ccb_entry.pinfo, 820 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 821 } else { 822 retval = 0; 823 } 824 return (retval); 825} 826 827static __inline int 828periph_is_queued(struct cam_periph *periph) 829{ 830 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 831} 832 833static __inline int 834device_is_alloc_queued(struct cam_ed *device) 835{ 836 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 837} 838 839static __inline int 840device_is_send_queued(struct cam_ed *device) 841{ 842 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 843} 844 845static __inline int 846dev_allocq_is_runnable(struct cam_devq *devq) 847{ 848 /* 849 * Have work to do. 850 * Have space to do more work. 851 * Allowed to do work. 852 */ 853 return ((devq->alloc_queue.qfrozen_cnt == 0) 854 && (devq->alloc_queue.entries > 0) 855 && (devq->alloc_openings > 0)); 856} 857 858static void 859xpt_periph_init() 860{ 861 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 862} 863 864static void 865probe_periph_init() 866{ 867} 868 869 870static void 871xptdone(struct cam_periph *periph, union ccb *done_ccb) 872{ 873 /* Caller will release the CCB */ 874 wakeup(&done_ccb->ccb_h.cbfcnp); 875} 876 877static int 878xptopen(dev_t dev, int flags, int fmt, struct proc *p) 879{ 880 int unit; 881 882 unit = minor(dev) & 0xff; 883 884 /* 885 * Only allow read-write access. 886 */ 887 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 888 return(EPERM); 889 890 /* 891 * We don't allow nonblocking access. 892 */ 893 if ((flags & O_NONBLOCK) != 0) { 894 printf("xpt%d: can't do nonblocking accesss\n", unit); 895 return(ENODEV); 896 } 897 898 /* 899 * We only have one transport layer right now. If someone accesses 900 * us via something other than minor number 1, point out their 901 * mistake. 902 */ 903 if (unit != 0) { 904 printf("xptopen: got invalid xpt unit %d\n", unit); 905 return(ENXIO); 906 } 907 908 /* Mark ourselves open */ 909 xsoftc.flags |= XPT_FLAG_OPEN; 910 911 return(0); 912} 913 914static int 915xptclose(dev_t dev, int flag, int fmt, struct proc *p) 916{ 917 int unit; 918 919 unit = minor(dev) & 0xff; 920 921 /* 922 * We only have one transport layer right now. If someone accesses 923 * us via something other than minor number 1, point out their 924 * mistake. 925 */ 926 if (unit != 0) { 927 printf("xptclose: got invalid xpt unit %d\n", unit); 928 return(ENXIO); 929 } 930 931 /* Mark ourselves closed */ 932 xsoftc.flags &= ~XPT_FLAG_OPEN; 933 934 return(0); 935} 936 937static int 938xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 939{ 940 int unit, error; 941 942 error = 0; 943 unit = minor(dev) & 0xff; 944 945 /* 946 * We only have one transport layer right now. If someone accesses 947 * us via something other than minor number 1, point out their 948 * mistake. 949 */ 950 if (unit != 0) { 951 printf("xptioctl: got invalid xpt unit %d\n", unit); 952 return(ENXIO); 953 } 954 955 switch(cmd) { 956 /* 957 * For the transport layer CAMIOCOMMAND ioctl, we really only want 958 * to accept CCB types that don't quite make sense to send through a 959 * passthrough driver. XPT_PATH_INQ is an exception to this, as stated 960 * in the CAM spec. 961 */ 962 case CAMIOCOMMAND: { 963 union ccb *ccb; 964 union ccb *inccb; 965 966 inccb = (union ccb *)addr; 967 968 switch(inccb->ccb_h.func_code) { 969 case XPT_SCAN_BUS: 970 case XPT_RESET_BUS: 971 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 972 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 973 error = EINVAL; 974 break; 975 } 976 /* FALLTHROUGH */ 977 case XPT_PATH_INQ: 978 case XPT_SCAN_LUN: 979 980 ccb = xpt_alloc_ccb(); 981 982 /* 983 * Create a path using the bus, target, and lun the 984 * user passed in. 985 */ 986 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 987 inccb->ccb_h.path_id, 988 inccb->ccb_h.target_id, 989 inccb->ccb_h.target_lun) != 990 CAM_REQ_CMP){ 991 error = EINVAL; 992 xpt_free_ccb(ccb); 993 break; 994 } 995 /* Ensure all of our fields are correct */ 996 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 997 inccb->ccb_h.pinfo.priority); 998 xpt_merge_ccb(ccb, inccb); 999 ccb->ccb_h.cbfcnp = xptdone; 1000 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1001 bcopy(ccb, inccb, sizeof(union ccb)); 1002 xpt_free_path(ccb->ccb_h.path); 1003 xpt_free_ccb(ccb); 1004 break; 1005 1006 case XPT_DEBUG: { 1007 union ccb ccb; 1008 1009 /* 1010 * This is an immediate CCB, so it's okay to 1011 * allocate it on the stack. 1012 */ 1013 1014 /* 1015 * Create a path using the bus, target, and lun the 1016 * user passed in. 1017 */ 1018 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1019 inccb->ccb_h.path_id, 1020 inccb->ccb_h.target_id, 1021 inccb->ccb_h.target_lun) != 1022 CAM_REQ_CMP){ 1023 error = EINVAL; 1024 break; 1025 } 1026 /* Ensure all of our fields are correct */ 1027 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1028 inccb->ccb_h.pinfo.priority); 1029 xpt_merge_ccb(&ccb, inccb); 1030 ccb.ccb_h.cbfcnp = xptdone; 1031 xpt_action(&ccb); 1032 bcopy(&ccb, inccb, sizeof(union ccb)); 1033 xpt_free_path(ccb.ccb_h.path); 1034 break; 1035 1036 } 1037 case XPT_DEV_MATCH: { 1038 struct cam_periph_map_info mapinfo; 1039 struct cam_path *old_path; 1040 1041 /* 1042 * We can't deal with physical addresses for this 1043 * type of transaction. 1044 */ 1045 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1046 error = EINVAL; 1047 break; 1048 } 1049 1050 /* 1051 * Save this in case the caller had it set to 1052 * something in particular. 1053 */ 1054 old_path = inccb->ccb_h.path; 1055 1056 /* 1057 * We really don't need a path for the matching 1058 * code. The path is needed because of the 1059 * debugging statements in xpt_action(). They 1060 * assume that the CCB has a valid path. 1061 */ 1062 inccb->ccb_h.path = xpt_periph->path; 1063 1064 bzero(&mapinfo, sizeof(mapinfo)); 1065 1066 /* 1067 * Map the pattern and match buffers into kernel 1068 * virtual address space. 1069 */ 1070 error = cam_periph_mapmem(inccb, &mapinfo); 1071 1072 if (error) { 1073 inccb->ccb_h.path = old_path; 1074 break; 1075 } 1076 1077 /* 1078 * This is an immediate CCB, we can send it on directly. 1079 */ 1080 xpt_action(inccb); 1081 1082 /* 1083 * Map the buffers back into user space. 1084 */ 1085 cam_periph_unmapmem(inccb, &mapinfo); 1086 1087 inccb->ccb_h.path = old_path; 1088 1089 error = 0; 1090 break; 1091 } 1092 case XPT_ENG_INQ: 1093 case XPT_ENG_EXEC: 1094 error = ENOTSUP; 1095 break; 1096 default: 1097 error = EINVAL; 1098 break; 1099 } 1100 break; 1101 } 1102 /* 1103 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1104 * with the periphal driver name and unit name filled in. The other 1105 * fields don't really matter as input. The passthrough driver name 1106 * ("pass"), and unit number are passed back in the ccb. The current 1107 * device generation number, and the index into the device peripheral 1108 * driver list, and the status are also passed back. Note that 1109 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1110 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1111 * (or rather should be) impossible for the device peripheral driver 1112 * list to change since we look at the whole thing in one pass, and 1113 * we do it with splcam protection. 1114 * 1115 */ 1116 case CAMGETPASSTHRU: { 1117 union ccb *ccb; 1118 struct cam_periph *periph; 1119 struct periph_driver **p_drv; 1120 char *name; 1121 int unit; 1122 int cur_generation; 1123 int base_periph_found; 1124 int splbreaknum; 1125 int s; 1126 1127 ccb = (union ccb *)addr; 1128 unit = ccb->cgdl.unit_number; 1129 name = ccb->cgdl.periph_name; 1130 /* 1131 * Every 100 devices, we want to drop our spl protection to 1132 * give the software interrupt handler a chance to run. 1133 * Most systems won't run into this check, but this should 1134 * avoid starvation in the software interrupt handler in 1135 * large systems. 1136 */ 1137 splbreaknum = 100; 1138 1139 ccb = (union ccb *)addr; 1140 1141 base_periph_found = 0; 1142 1143 /* 1144 * Sanity check -- make sure we don't get a null peripheral 1145 * driver name. 1146 */ 1147 if (*ccb->cgdl.periph_name == '\0') { 1148 error = EINVAL; 1149 break; 1150 } 1151 1152 /* Keep the list from changing while we traverse it */ 1153 s = splcam(); 1154ptstartover: 1155 cur_generation = xsoftc.generation; 1156 1157 /* first find our driver in the list of drivers */ 1158 for (p_drv = (struct periph_driver **)periphdriver_set.ls_items; 1159 *p_drv != NULL; p_drv++) 1160 if (strcmp((*p_drv)->driver_name, name) == 0) 1161 break; 1162 1163 if (*p_drv == NULL) { 1164 splx(s); 1165 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1166 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1167 *ccb->cgdl.periph_name = '\0'; 1168 ccb->cgdl.unit_number = 0; 1169 error = ENOENT; 1170 break; 1171 } 1172 1173 /* 1174 * Run through every peripheral instance of this driver 1175 * and check to see whether it matches the unit passed 1176 * in by the user. If it does, get out of the loops and 1177 * find the passthrough driver associated with that 1178 * peripheral driver. 1179 */ 1180 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 1181 periph = TAILQ_NEXT(periph, unit_links)) { 1182 1183 if (periph->unit_number == unit) { 1184 break; 1185 } else if (--splbreaknum == 0) { 1186 splx(s); 1187 s = splcam(); 1188 splbreaknum = 100; 1189 if (cur_generation != xsoftc.generation) 1190 goto ptstartover; 1191 } 1192 } 1193 /* 1194 * If we found the peripheral driver that the user passed 1195 * in, go through all of the peripheral drivers for that 1196 * particular device and look for a passthrough driver. 1197 */ 1198 if (periph != NULL) { 1199 struct cam_ed *device; 1200 int i; 1201 1202 base_periph_found = 1; 1203 device = periph->path->device; 1204 for (i = 0, periph = device->periphs.slh_first; 1205 periph != NULL; 1206 periph = periph->periph_links.sle_next, i++) { 1207 /* 1208 * Check to see whether we have a 1209 * passthrough device or not. 1210 */ 1211 if (strcmp(periph->periph_name, "pass") == 0) { 1212 /* 1213 * Fill in the getdevlist fields. 1214 */ 1215 strcpy(ccb->cgdl.periph_name, 1216 periph->periph_name); 1217 ccb->cgdl.unit_number = 1218 periph->unit_number; 1219 if (periph->periph_links.sle_next) 1220 ccb->cgdl.status = 1221 CAM_GDEVLIST_MORE_DEVS; 1222 else 1223 ccb->cgdl.status = 1224 CAM_GDEVLIST_LAST_DEVICE; 1225 ccb->cgdl.generation = 1226 device->generation; 1227 ccb->cgdl.index = i; 1228 /* 1229 * Fill in some CCB header fields 1230 * that the user may want. 1231 */ 1232 ccb->ccb_h.path_id = 1233 periph->path->bus->path_id; 1234 ccb->ccb_h.target_id = 1235 periph->path->target->target_id; 1236 ccb->ccb_h.target_lun = 1237 periph->path->device->lun_id; 1238 ccb->ccb_h.status = CAM_REQ_CMP; 1239 break; 1240 } 1241 } 1242 } 1243 1244 /* 1245 * If the periph is null here, one of two things has 1246 * happened. The first possibility is that we couldn't 1247 * find the unit number of the particular peripheral driver 1248 * that the user is asking about. e.g. the user asks for 1249 * the passthrough driver for "da11". We find the list of 1250 * "da" peripherals all right, but there is no unit 11. 1251 * The other possibility is that we went through the list 1252 * of peripheral drivers attached to the device structure, 1253 * but didn't find one with the name "pass". Either way, 1254 * we return ENOENT, since we couldn't find something. 1255 */ 1256 if (periph == NULL) { 1257 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1258 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1259 *ccb->cgdl.periph_name = '\0'; 1260 ccb->cgdl.unit_number = 0; 1261 error = ENOENT; 1262 /* 1263 * It is unfortunate that this is even necessary, 1264 * but there are many, many clueless users out there. 1265 * If this is true, the user is looking for the 1266 * passthrough driver, but doesn't have one in his 1267 * kernel. 1268 */ 1269 if (base_periph_found == 1) { 1270 printf("xptioctl: pass driver is not in the " 1271 "kernel\n"); 1272 printf("xptioctl: put \"device pass0\" in " 1273 "your kernel config file\n"); 1274 } 1275 } 1276 splx(s); 1277 break; 1278 } 1279 default: 1280 error = ENOTTY; 1281 break; 1282 } 1283 1284 return(error); 1285} 1286 1287static int 1288cam_module_event_handler(module_t mod, int what, void *arg) 1289{ 1290 if (what == MOD_LOAD) { 1291 xpt_init(NULL); 1292 } else if (what == MOD_UNLOAD) { 1293 return EBUSY; 1294 } 1295 1296 return 0; 1297} 1298 1299/* Functions accessed by the peripheral drivers */ 1300static void 1301xpt_init(dummy) 1302 void *dummy; 1303{ 1304 struct cam_sim *xpt_sim; 1305 struct cam_path *path; 1306 struct cam_devq *devq; 1307 cam_status status; 1308 1309 TAILQ_INIT(&xpt_busses); 1310 TAILQ_INIT(&cam_bioq); 1311 TAILQ_INIT(&cam_netq); 1312 SLIST_INIT(&ccb_freeq); 1313 STAILQ_INIT(&highpowerq); 1314 1315 /* 1316 * The xpt layer is, itself, the equivelent of a SIM. 1317 * Allow 16 ccbs in the ccb pool for it. This should 1318 * give decent parallelism when we probe busses and 1319 * perform other XPT functions. 1320 */ 1321 devq = cam_simq_alloc(16); 1322 xpt_sim = cam_sim_alloc(xptaction, 1323 xptpoll, 1324 "xpt", 1325 /*softc*/NULL, 1326 /*unit*/0, 1327 /*max_dev_transactions*/0, 1328 /*max_tagged_dev_transactions*/0, 1329 devq); 1330 xpt_max_ccbs = 16; 1331 1332 xpt_bus_register(xpt_sim, /*bus #*/0); 1333 1334 /* 1335 * Looking at the XPT from the SIM layer, the XPT is 1336 * the equivelent of a peripheral driver. Allocate 1337 * a peripheral driver entry for us. 1338 */ 1339 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1340 CAM_TARGET_WILDCARD, 1341 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1342 printf("xpt_init: xpt_create_path failed with status %#x," 1343 " failing attach\n", status); 1344 return; 1345 } 1346 1347 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1348 path, NULL, 0, NULL); 1349 xpt_free_path(path); 1350 1351 xpt_sim->softc = xpt_periph; 1352 1353 /* 1354 * Register a callback for when interrupts are enabled. 1355 */ 1356 xpt_config_hook = 1357 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 1358 M_TEMP, M_NOWAIT | M_ZERO); 1359 if (xpt_config_hook == NULL) { 1360 printf("xpt_init: Cannot malloc config hook " 1361 "- failing attach\n"); 1362 return; 1363 } 1364 1365 xpt_config_hook->ich_func = xpt_config; 1366 if (config_intrhook_establish(xpt_config_hook) != 0) { 1367 free (xpt_config_hook, M_TEMP); 1368 printf("xpt_init: config_intrhook_establish failed " 1369 "- failing attach\n"); 1370 } 1371 1372 /* Install our software interrupt handlers */ 1373 camnet_ih = sinthand_add("camnet", NULL, camisr, &cam_netq, 1374 SWI_CAMNET, 0); 1375 cambio_ih = sinthand_add("cambio", NULL, camisr, &cam_bioq, 1376 SWI_CAMBIO, 0); 1377} 1378 1379static cam_status 1380xptregister(struct cam_periph *periph, void *arg) 1381{ 1382 if (periph == NULL) { 1383 printf("xptregister: periph was NULL!!\n"); 1384 return(CAM_REQ_CMP_ERR); 1385 } 1386 1387 periph->softc = NULL; 1388 1389 xpt_periph = periph; 1390 1391 return(CAM_REQ_CMP); 1392} 1393 1394int32_t 1395xpt_add_periph(struct cam_periph *periph) 1396{ 1397 struct cam_ed *device; 1398 int32_t status; 1399 struct periph_list *periph_head; 1400 1401 device = periph->path->device; 1402 1403 periph_head = &device->periphs; 1404 1405 status = CAM_REQ_CMP; 1406 1407 if (device != NULL) { 1408 int s; 1409 1410 /* 1411 * Make room for this peripheral 1412 * so it will fit in the queue 1413 * when it's scheduled to run 1414 */ 1415 s = splsoftcam(); 1416 status = camq_resize(&device->drvq, 1417 device->drvq.array_size + 1); 1418 1419 device->generation++; 1420 1421 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1422 1423 splx(s); 1424 } 1425 1426 xsoftc.generation++; 1427 1428 return (status); 1429} 1430 1431void 1432xpt_remove_periph(struct cam_periph *periph) 1433{ 1434 struct cam_ed *device; 1435 1436 device = periph->path->device; 1437 1438 if (device != NULL) { 1439 int s; 1440 struct periph_list *periph_head; 1441 1442 periph_head = &device->periphs; 1443 1444 /* Release the slot for this peripheral */ 1445 s = splsoftcam(); 1446 camq_resize(&device->drvq, device->drvq.array_size - 1); 1447 1448 device->generation++; 1449 1450 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1451 1452 splx(s); 1453 } 1454 1455 xsoftc.generation++; 1456 1457} 1458 1459void 1460xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1461{ 1462 int s; 1463 u_int mb; 1464 struct cam_path *path; 1465 struct ccb_trans_settings cts; 1466 1467 path = periph->path; 1468 /* 1469 * To ensure that this is printed in one piece, 1470 * mask out CAM interrupts. 1471 */ 1472 s = splsoftcam(); 1473 printf("%s%d at %s%d bus %d target %d lun %d\n", 1474 periph->periph_name, periph->unit_number, 1475 path->bus->sim->sim_name, 1476 path->bus->sim->unit_number, 1477 path->bus->sim->bus_id, 1478 path->target->target_id, 1479 path->device->lun_id); 1480 printf("%s%d: ", periph->periph_name, periph->unit_number); 1481 scsi_print_inquiry(&path->device->inq_data); 1482 if ((bootverbose) 1483 && (path->device->serial_num_len > 0)) { 1484 /* Don't wrap the screen - print only the first 60 chars */ 1485 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1486 periph->unit_number, path->device->serial_num); 1487 } 1488 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1489 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1490 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1491 xpt_action((union ccb*)&cts); 1492 if (cts.ccb_h.status == CAM_REQ_CMP) { 1493 u_int speed; 1494 u_int freq; 1495 1496 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1497 && cts.sync_offset != 0) { 1498 freq = scsi_calc_syncsrate(cts.sync_period); 1499 speed = freq; 1500 } else { 1501 struct ccb_pathinq cpi; 1502 1503 /* Ask the SIM for its base transfer speed */ 1504 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1505 cpi.ccb_h.func_code = XPT_PATH_INQ; 1506 xpt_action((union ccb *)&cpi); 1507 1508 speed = cpi.base_transfer_speed; 1509 freq = 0; 1510 } 1511 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1512 speed *= (0x01 << cts.bus_width); 1513 mb = speed / 1000; 1514 if (mb > 0) 1515 printf("%s%d: %d.%03dMB/s transfers", 1516 periph->periph_name, periph->unit_number, 1517 mb, speed % 1000); 1518 else 1519 printf("%s%d: %dKB/s transfers", periph->periph_name, 1520 periph->unit_number, speed); 1521 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1522 && cts.sync_offset != 0) { 1523 printf(" (%d.%03dMHz, offset %d", freq / 1000, 1524 freq % 1000, cts.sync_offset); 1525 } 1526 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1527 && cts.bus_width > 0) { 1528 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1529 && cts.sync_offset != 0) { 1530 printf(", "); 1531 } else { 1532 printf(" ("); 1533 } 1534 printf("%dbit)", 8 * (0x01 << cts.bus_width)); 1535 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1536 && cts.sync_offset != 0) { 1537 printf(")"); 1538 } 1539 1540 if (path->device->inq_flags & SID_CmdQue 1541 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1542 printf(", Tagged Queueing Enabled"); 1543 } 1544 1545 printf("\n"); 1546 } else if (path->device->inq_flags & SID_CmdQue 1547 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1548 printf("%s%d: Tagged Queueing Enabled\n", 1549 periph->periph_name, periph->unit_number); 1550 } 1551 1552 /* 1553 * We only want to print the caller's announce string if they've 1554 * passed one in.. 1555 */ 1556 if (announce_string != NULL) 1557 printf("%s%d: %s\n", periph->periph_name, 1558 periph->unit_number, announce_string); 1559 splx(s); 1560} 1561 1562 1563static dev_match_ret 1564xptbusmatch(struct dev_match_pattern *patterns, int num_patterns, 1565 struct cam_eb *bus) 1566{ 1567 dev_match_ret retval; 1568 int i; 1569 1570 retval = DM_RET_NONE; 1571 1572 /* 1573 * If we aren't given something to match against, that's an error. 1574 */ 1575 if (bus == NULL) 1576 return(DM_RET_ERROR); 1577 1578 /* 1579 * If there are no match entries, then this bus matches no 1580 * matter what. 1581 */ 1582 if ((patterns == NULL) || (num_patterns == 0)) 1583 return(DM_RET_DESCEND | DM_RET_COPY); 1584 1585 for (i = 0; i < num_patterns; i++) { 1586 struct bus_match_pattern *cur_pattern; 1587 1588 /* 1589 * If the pattern in question isn't for a bus node, we 1590 * aren't interested. However, we do indicate to the 1591 * calling routine that we should continue descending the 1592 * tree, since the user wants to match against lower-level 1593 * EDT elements. 1594 */ 1595 if (patterns[i].type != DEV_MATCH_BUS) { 1596 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1597 retval |= DM_RET_DESCEND; 1598 continue; 1599 } 1600 1601 cur_pattern = &patterns[i].pattern.bus_pattern; 1602 1603 /* 1604 * If they want to match any bus node, we give them any 1605 * device node. 1606 */ 1607 if (cur_pattern->flags == BUS_MATCH_ANY) { 1608 /* set the copy flag */ 1609 retval |= DM_RET_COPY; 1610 1611 /* 1612 * If we've already decided on an action, go ahead 1613 * and return. 1614 */ 1615 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1616 return(retval); 1617 } 1618 1619 /* 1620 * Not sure why someone would do this... 1621 */ 1622 if (cur_pattern->flags == BUS_MATCH_NONE) 1623 continue; 1624 1625 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1626 && (cur_pattern->path_id != bus->path_id)) 1627 continue; 1628 1629 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1630 && (cur_pattern->bus_id != bus->sim->bus_id)) 1631 continue; 1632 1633 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1634 && (cur_pattern->unit_number != bus->sim->unit_number)) 1635 continue; 1636 1637 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1638 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1639 DEV_IDLEN) != 0)) 1640 continue; 1641 1642 /* 1643 * If we get to this point, the user definitely wants 1644 * information on this bus. So tell the caller to copy the 1645 * data out. 1646 */ 1647 retval |= DM_RET_COPY; 1648 1649 /* 1650 * If the return action has been set to descend, then we 1651 * know that we've already seen a non-bus matching 1652 * expression, therefore we need to further descend the tree. 1653 * This won't change by continuing around the loop, so we 1654 * go ahead and return. If we haven't seen a non-bus 1655 * matching expression, we keep going around the loop until 1656 * we exhaust the matching expressions. We'll set the stop 1657 * flag once we fall out of the loop. 1658 */ 1659 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1660 return(retval); 1661 } 1662 1663 /* 1664 * If the return action hasn't been set to descend yet, that means 1665 * we haven't seen anything other than bus matching patterns. So 1666 * tell the caller to stop descending the tree -- the user doesn't 1667 * want to match against lower level tree elements. 1668 */ 1669 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1670 retval |= DM_RET_STOP; 1671 1672 return(retval); 1673} 1674 1675static dev_match_ret 1676xptdevicematch(struct dev_match_pattern *patterns, int num_patterns, 1677 struct cam_ed *device) 1678{ 1679 dev_match_ret retval; 1680 int i; 1681 1682 retval = DM_RET_NONE; 1683 1684 /* 1685 * If we aren't given something to match against, that's an error. 1686 */ 1687 if (device == NULL) 1688 return(DM_RET_ERROR); 1689 1690 /* 1691 * If there are no match entries, then this device matches no 1692 * matter what. 1693 */ 1694 if ((patterns == NULL) || (patterns == 0)) 1695 return(DM_RET_DESCEND | DM_RET_COPY); 1696 1697 for (i = 0; i < num_patterns; i++) { 1698 struct device_match_pattern *cur_pattern; 1699 1700 /* 1701 * If the pattern in question isn't for a device node, we 1702 * aren't interested. 1703 */ 1704 if (patterns[i].type != DEV_MATCH_DEVICE) { 1705 if ((patterns[i].type == DEV_MATCH_PERIPH) 1706 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1707 retval |= DM_RET_DESCEND; 1708 continue; 1709 } 1710 1711 cur_pattern = &patterns[i].pattern.device_pattern; 1712 1713 /* 1714 * If they want to match any device node, we give them any 1715 * device node. 1716 */ 1717 if (cur_pattern->flags == DEV_MATCH_ANY) { 1718 /* set the copy flag */ 1719 retval |= DM_RET_COPY; 1720 1721 1722 /* 1723 * If we've already decided on an action, go ahead 1724 * and return. 1725 */ 1726 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1727 return(retval); 1728 } 1729 1730 /* 1731 * Not sure why someone would do this... 1732 */ 1733 if (cur_pattern->flags == DEV_MATCH_NONE) 1734 continue; 1735 1736 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1737 && (cur_pattern->path_id != device->target->bus->path_id)) 1738 continue; 1739 1740 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1741 && (cur_pattern->target_id != device->target->target_id)) 1742 continue; 1743 1744 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1745 && (cur_pattern->target_lun != device->lun_id)) 1746 continue; 1747 1748 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1749 && (cam_quirkmatch((caddr_t)&device->inq_data, 1750 (caddr_t)&cur_pattern->inq_pat, 1751 1, sizeof(cur_pattern->inq_pat), 1752 scsi_static_inquiry_match) == NULL)) 1753 continue; 1754 1755 /* 1756 * If we get to this point, the user definitely wants 1757 * information on this device. So tell the caller to copy 1758 * the data out. 1759 */ 1760 retval |= DM_RET_COPY; 1761 1762 /* 1763 * If the return action has been set to descend, then we 1764 * know that we've already seen a peripheral matching 1765 * expression, therefore we need to further descend the tree. 1766 * This won't change by continuing around the loop, so we 1767 * go ahead and return. If we haven't seen a peripheral 1768 * matching expression, we keep going around the loop until 1769 * we exhaust the matching expressions. We'll set the stop 1770 * flag once we fall out of the loop. 1771 */ 1772 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1773 return(retval); 1774 } 1775 1776 /* 1777 * If the return action hasn't been set to descend yet, that means 1778 * we haven't seen any peripheral matching patterns. So tell the 1779 * caller to stop descending the tree -- the user doesn't want to 1780 * match against lower level tree elements. 1781 */ 1782 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1783 retval |= DM_RET_STOP; 1784 1785 return(retval); 1786} 1787 1788/* 1789 * Match a single peripheral against any number of match patterns. 1790 */ 1791static dev_match_ret 1792xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns, 1793 struct cam_periph *periph) 1794{ 1795 dev_match_ret retval; 1796 int i; 1797 1798 /* 1799 * If we aren't given something to match against, that's an error. 1800 */ 1801 if (periph == NULL) 1802 return(DM_RET_ERROR); 1803 1804 /* 1805 * If there are no match entries, then this peripheral matches no 1806 * matter what. 1807 */ 1808 if ((patterns == NULL) || (num_patterns == 0)) 1809 return(DM_RET_STOP | DM_RET_COPY); 1810 1811 /* 1812 * There aren't any nodes below a peripheral node, so there's no 1813 * reason to descend the tree any further. 1814 */ 1815 retval = DM_RET_STOP; 1816 1817 for (i = 0; i < num_patterns; i++) { 1818 struct periph_match_pattern *cur_pattern; 1819 1820 /* 1821 * If the pattern in question isn't for a peripheral, we 1822 * aren't interested. 1823 */ 1824 if (patterns[i].type != DEV_MATCH_PERIPH) 1825 continue; 1826 1827 cur_pattern = &patterns[i].pattern.periph_pattern; 1828 1829 /* 1830 * If they want to match on anything, then we will do so. 1831 */ 1832 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1833 /* set the copy flag */ 1834 retval |= DM_RET_COPY; 1835 1836 /* 1837 * We've already set the return action to stop, 1838 * since there are no nodes below peripherals in 1839 * the tree. 1840 */ 1841 return(retval); 1842 } 1843 1844 /* 1845 * Not sure why someone would do this... 1846 */ 1847 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1848 continue; 1849 1850 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1851 && (cur_pattern->path_id != periph->path->bus->path_id)) 1852 continue; 1853 1854 /* 1855 * For the target and lun id's, we have to make sure the 1856 * target and lun pointers aren't NULL. The xpt peripheral 1857 * has a wildcard target and device. 1858 */ 1859 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1860 && ((periph->path->target == NULL) 1861 ||(cur_pattern->target_id != periph->path->target->target_id))) 1862 continue; 1863 1864 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1865 && ((periph->path->device == NULL) 1866 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1867 continue; 1868 1869 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1870 && (cur_pattern->unit_number != periph->unit_number)) 1871 continue; 1872 1873 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1874 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1875 DEV_IDLEN) != 0)) 1876 continue; 1877 1878 /* 1879 * If we get to this point, the user definitely wants 1880 * information on this peripheral. So tell the caller to 1881 * copy the data out. 1882 */ 1883 retval |= DM_RET_COPY; 1884 1885 /* 1886 * The return action has already been set to stop, since 1887 * peripherals don't have any nodes below them in the EDT. 1888 */ 1889 return(retval); 1890 } 1891 1892 /* 1893 * If we get to this point, the peripheral that was passed in 1894 * doesn't match any of the patterns. 1895 */ 1896 return(retval); 1897} 1898 1899static int 1900xptedtbusfunc(struct cam_eb *bus, void *arg) 1901{ 1902 struct ccb_dev_match *cdm; 1903 dev_match_ret retval; 1904 1905 cdm = (struct ccb_dev_match *)arg; 1906 1907 /* 1908 * If our position is for something deeper in the tree, that means 1909 * that we've already seen this node. So, we keep going down. 1910 */ 1911 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1912 && (cdm->pos.cookie.bus == bus) 1913 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1914 && (cdm->pos.cookie.target != NULL)) 1915 retval = DM_RET_DESCEND; 1916 else 1917 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1918 1919 /* 1920 * If we got an error, bail out of the search. 1921 */ 1922 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1923 cdm->status = CAM_DEV_MATCH_ERROR; 1924 return(0); 1925 } 1926 1927 /* 1928 * If the copy flag is set, copy this bus out. 1929 */ 1930 if (retval & DM_RET_COPY) { 1931 int spaceleft, j; 1932 1933 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1934 sizeof(struct dev_match_result)); 1935 1936 /* 1937 * If we don't have enough space to put in another 1938 * match result, save our position and tell the 1939 * user there are more devices to check. 1940 */ 1941 if (spaceleft < sizeof(struct dev_match_result)) { 1942 bzero(&cdm->pos, sizeof(cdm->pos)); 1943 cdm->pos.position_type = 1944 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1945 1946 cdm->pos.cookie.bus = bus; 1947 cdm->pos.generations[CAM_BUS_GENERATION]= 1948 bus_generation; 1949 cdm->status = CAM_DEV_MATCH_MORE; 1950 return(0); 1951 } 1952 j = cdm->num_matches; 1953 cdm->num_matches++; 1954 cdm->matches[j].type = DEV_MATCH_BUS; 1955 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1956 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1957 cdm->matches[j].result.bus_result.unit_number = 1958 bus->sim->unit_number; 1959 strncpy(cdm->matches[j].result.bus_result.dev_name, 1960 bus->sim->sim_name, DEV_IDLEN); 1961 } 1962 1963 /* 1964 * If the user is only interested in busses, there's no 1965 * reason to descend to the next level in the tree. 1966 */ 1967 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1968 return(1); 1969 1970 /* 1971 * If there is a target generation recorded, check it to 1972 * make sure the target list hasn't changed. 1973 */ 1974 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1975 && (bus == cdm->pos.cookie.bus) 1976 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1977 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1978 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1979 bus->generation)) { 1980 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1981 return(0); 1982 } 1983 1984 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1985 && (cdm->pos.cookie.bus == bus) 1986 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1987 && (cdm->pos.cookie.target != NULL)) 1988 return(xpttargettraverse(bus, 1989 (struct cam_et *)cdm->pos.cookie.target, 1990 xptedttargetfunc, arg)); 1991 else 1992 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1993} 1994 1995static int 1996xptedttargetfunc(struct cam_et *target, void *arg) 1997{ 1998 struct ccb_dev_match *cdm; 1999 2000 cdm = (struct ccb_dev_match *)arg; 2001 2002 /* 2003 * If there is a device list generation recorded, check it to 2004 * make sure the device list hasn't changed. 2005 */ 2006 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2007 && (cdm->pos.cookie.bus == target->bus) 2008 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2009 && (cdm->pos.cookie.target == target) 2010 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2011 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2012 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2013 target->generation)) { 2014 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2015 return(0); 2016 } 2017 2018 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2019 && (cdm->pos.cookie.bus == target->bus) 2020 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2021 && (cdm->pos.cookie.target == target) 2022 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2023 && (cdm->pos.cookie.device != NULL)) 2024 return(xptdevicetraverse(target, 2025 (struct cam_ed *)cdm->pos.cookie.device, 2026 xptedtdevicefunc, arg)); 2027 else 2028 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2029} 2030 2031static int 2032xptedtdevicefunc(struct cam_ed *device, void *arg) 2033{ 2034 2035 struct ccb_dev_match *cdm; 2036 dev_match_ret retval; 2037 2038 cdm = (struct ccb_dev_match *)arg; 2039 2040 /* 2041 * If our position is for something deeper in the tree, that means 2042 * that we've already seen this node. So, we keep going down. 2043 */ 2044 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2045 && (cdm->pos.cookie.device == device) 2046 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2047 && (cdm->pos.cookie.periph != NULL)) 2048 retval = DM_RET_DESCEND; 2049 else 2050 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2051 device); 2052 2053 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2054 cdm->status = CAM_DEV_MATCH_ERROR; 2055 return(0); 2056 } 2057 2058 /* 2059 * If the copy flag is set, copy this device out. 2060 */ 2061 if (retval & DM_RET_COPY) { 2062 int spaceleft, j; 2063 2064 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2065 sizeof(struct dev_match_result)); 2066 2067 /* 2068 * If we don't have enough space to put in another 2069 * match result, save our position and tell the 2070 * user there are more devices to check. 2071 */ 2072 if (spaceleft < sizeof(struct dev_match_result)) { 2073 bzero(&cdm->pos, sizeof(cdm->pos)); 2074 cdm->pos.position_type = 2075 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2076 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2077 2078 cdm->pos.cookie.bus = device->target->bus; 2079 cdm->pos.generations[CAM_BUS_GENERATION]= 2080 bus_generation; 2081 cdm->pos.cookie.target = device->target; 2082 cdm->pos.generations[CAM_TARGET_GENERATION] = 2083 device->target->bus->generation; 2084 cdm->pos.cookie.device = device; 2085 cdm->pos.generations[CAM_DEV_GENERATION] = 2086 device->target->generation; 2087 cdm->status = CAM_DEV_MATCH_MORE; 2088 return(0); 2089 } 2090 j = cdm->num_matches; 2091 cdm->num_matches++; 2092 cdm->matches[j].type = DEV_MATCH_DEVICE; 2093 cdm->matches[j].result.device_result.path_id = 2094 device->target->bus->path_id; 2095 cdm->matches[j].result.device_result.target_id = 2096 device->target->target_id; 2097 cdm->matches[j].result.device_result.target_lun = 2098 device->lun_id; 2099 bcopy(&device->inq_data, 2100 &cdm->matches[j].result.device_result.inq_data, 2101 sizeof(struct scsi_inquiry_data)); 2102 2103 /* Let the user know whether this device is unconfigured */ 2104 if (device->flags & CAM_DEV_UNCONFIGURED) 2105 cdm->matches[j].result.device_result.flags = 2106 DEV_RESULT_UNCONFIGURED; 2107 else 2108 cdm->matches[j].result.device_result.flags = 2109 DEV_RESULT_NOFLAG; 2110 } 2111 2112 /* 2113 * If the user isn't interested in peripherals, don't descend 2114 * the tree any further. 2115 */ 2116 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2117 return(1); 2118 2119 /* 2120 * If there is a peripheral list generation recorded, make sure 2121 * it hasn't changed. 2122 */ 2123 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2124 && (device->target->bus == cdm->pos.cookie.bus) 2125 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2126 && (device->target == cdm->pos.cookie.target) 2127 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2128 && (device == cdm->pos.cookie.device) 2129 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2130 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2131 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2132 device->generation)){ 2133 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2134 return(0); 2135 } 2136 2137 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2138 && (cdm->pos.cookie.bus == device->target->bus) 2139 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2140 && (cdm->pos.cookie.target == device->target) 2141 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2142 && (cdm->pos.cookie.device == device) 2143 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2144 && (cdm->pos.cookie.periph != NULL)) 2145 return(xptperiphtraverse(device, 2146 (struct cam_periph *)cdm->pos.cookie.periph, 2147 xptedtperiphfunc, arg)); 2148 else 2149 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2150} 2151 2152static int 2153xptedtperiphfunc(struct cam_periph *periph, void *arg) 2154{ 2155 struct ccb_dev_match *cdm; 2156 dev_match_ret retval; 2157 2158 cdm = (struct ccb_dev_match *)arg; 2159 2160 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2161 2162 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2163 cdm->status = CAM_DEV_MATCH_ERROR; 2164 return(0); 2165 } 2166 2167 /* 2168 * If the copy flag is set, copy this peripheral out. 2169 */ 2170 if (retval & DM_RET_COPY) { 2171 int spaceleft, j; 2172 2173 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2174 sizeof(struct dev_match_result)); 2175 2176 /* 2177 * If we don't have enough space to put in another 2178 * match result, save our position and tell the 2179 * user there are more devices to check. 2180 */ 2181 if (spaceleft < sizeof(struct dev_match_result)) { 2182 bzero(&cdm->pos, sizeof(cdm->pos)); 2183 cdm->pos.position_type = 2184 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2185 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2186 CAM_DEV_POS_PERIPH; 2187 2188 cdm->pos.cookie.bus = periph->path->bus; 2189 cdm->pos.generations[CAM_BUS_GENERATION]= 2190 bus_generation; 2191 cdm->pos.cookie.target = periph->path->target; 2192 cdm->pos.generations[CAM_TARGET_GENERATION] = 2193 periph->path->bus->generation; 2194 cdm->pos.cookie.device = periph->path->device; 2195 cdm->pos.generations[CAM_DEV_GENERATION] = 2196 periph->path->target->generation; 2197 cdm->pos.cookie.periph = periph; 2198 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2199 periph->path->device->generation; 2200 cdm->status = CAM_DEV_MATCH_MORE; 2201 return(0); 2202 } 2203 2204 j = cdm->num_matches; 2205 cdm->num_matches++; 2206 cdm->matches[j].type = DEV_MATCH_PERIPH; 2207 cdm->matches[j].result.periph_result.path_id = 2208 periph->path->bus->path_id; 2209 cdm->matches[j].result.periph_result.target_id = 2210 periph->path->target->target_id; 2211 cdm->matches[j].result.periph_result.target_lun = 2212 periph->path->device->lun_id; 2213 cdm->matches[j].result.periph_result.unit_number = 2214 periph->unit_number; 2215 strncpy(cdm->matches[j].result.periph_result.periph_name, 2216 periph->periph_name, DEV_IDLEN); 2217 } 2218 2219 return(1); 2220} 2221 2222static int 2223xptedtmatch(struct ccb_dev_match *cdm) 2224{ 2225 int ret; 2226 2227 cdm->num_matches = 0; 2228 2229 /* 2230 * Check the bus list generation. If it has changed, the user 2231 * needs to reset everything and start over. 2232 */ 2233 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2234 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2235 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2236 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2237 return(0); 2238 } 2239 2240 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2241 && (cdm->pos.cookie.bus != NULL)) 2242 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2243 xptedtbusfunc, cdm); 2244 else 2245 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2246 2247 /* 2248 * If we get back 0, that means that we had to stop before fully 2249 * traversing the EDT. It also means that one of the subroutines 2250 * has set the status field to the proper value. If we get back 1, 2251 * we've fully traversed the EDT and copied out any matching entries. 2252 */ 2253 if (ret == 1) 2254 cdm->status = CAM_DEV_MATCH_LAST; 2255 2256 return(ret); 2257} 2258 2259static int 2260xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2261{ 2262 struct ccb_dev_match *cdm; 2263 2264 cdm = (struct ccb_dev_match *)arg; 2265 2266 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2267 && (cdm->pos.cookie.pdrv == pdrv) 2268 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2269 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2270 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2271 (*pdrv)->generation)) { 2272 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2273 return(0); 2274 } 2275 2276 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2277 && (cdm->pos.cookie.pdrv == pdrv) 2278 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2279 && (cdm->pos.cookie.periph != NULL)) 2280 return(xptpdperiphtraverse(pdrv, 2281 (struct cam_periph *)cdm->pos.cookie.periph, 2282 xptplistperiphfunc, arg)); 2283 else 2284 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2285} 2286 2287static int 2288xptplistperiphfunc(struct cam_periph *periph, void *arg) 2289{ 2290 struct ccb_dev_match *cdm; 2291 dev_match_ret retval; 2292 2293 cdm = (struct ccb_dev_match *)arg; 2294 2295 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2296 2297 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2298 cdm->status = CAM_DEV_MATCH_ERROR; 2299 return(0); 2300 } 2301 2302 /* 2303 * If the copy flag is set, copy this peripheral out. 2304 */ 2305 if (retval & DM_RET_COPY) { 2306 int spaceleft, j; 2307 2308 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2309 sizeof(struct dev_match_result)); 2310 2311 /* 2312 * If we don't have enough space to put in another 2313 * match result, save our position and tell the 2314 * user there are more devices to check. 2315 */ 2316 if (spaceleft < sizeof(struct dev_match_result)) { 2317 struct periph_driver **pdrv; 2318 2319 pdrv = NULL; 2320 bzero(&cdm->pos, sizeof(cdm->pos)); 2321 cdm->pos.position_type = 2322 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2323 CAM_DEV_POS_PERIPH; 2324 2325 /* 2326 * This may look a bit non-sensical, but it is 2327 * actually quite logical. There are very few 2328 * peripheral drivers, and bloating every peripheral 2329 * structure with a pointer back to its parent 2330 * peripheral driver linker set entry would cost 2331 * more in the long run than doing this quick lookup. 2332 */ 2333 for (pdrv = 2334 (struct periph_driver **)periphdriver_set.ls_items; 2335 *pdrv != NULL; pdrv++) { 2336 if (strcmp((*pdrv)->driver_name, 2337 periph->periph_name) == 0) 2338 break; 2339 } 2340 2341 if (pdrv == NULL) { 2342 cdm->status = CAM_DEV_MATCH_ERROR; 2343 return(0); 2344 } 2345 2346 cdm->pos.cookie.pdrv = pdrv; 2347 /* 2348 * The periph generation slot does double duty, as 2349 * does the periph pointer slot. They are used for 2350 * both edt and pdrv lookups and positioning. 2351 */ 2352 cdm->pos.cookie.periph = periph; 2353 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2354 (*pdrv)->generation; 2355 cdm->status = CAM_DEV_MATCH_MORE; 2356 return(0); 2357 } 2358 2359 j = cdm->num_matches; 2360 cdm->num_matches++; 2361 cdm->matches[j].type = DEV_MATCH_PERIPH; 2362 cdm->matches[j].result.periph_result.path_id = 2363 periph->path->bus->path_id; 2364 2365 /* 2366 * The transport layer peripheral doesn't have a target or 2367 * lun. 2368 */ 2369 if (periph->path->target) 2370 cdm->matches[j].result.periph_result.target_id = 2371 periph->path->target->target_id; 2372 else 2373 cdm->matches[j].result.periph_result.target_id = -1; 2374 2375 if (periph->path->device) 2376 cdm->matches[j].result.periph_result.target_lun = 2377 periph->path->device->lun_id; 2378 else 2379 cdm->matches[j].result.periph_result.target_lun = -1; 2380 2381 cdm->matches[j].result.periph_result.unit_number = 2382 periph->unit_number; 2383 strncpy(cdm->matches[j].result.periph_result.periph_name, 2384 periph->periph_name, DEV_IDLEN); 2385 } 2386 2387 return(1); 2388} 2389 2390static int 2391xptperiphlistmatch(struct ccb_dev_match *cdm) 2392{ 2393 int ret; 2394 2395 cdm->num_matches = 0; 2396 2397 /* 2398 * At this point in the edt traversal function, we check the bus 2399 * list generation to make sure that no busses have been added or 2400 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2401 * For the peripheral driver list traversal function, however, we 2402 * don't have to worry about new peripheral driver types coming or 2403 * going; they're in a linker set, and therefore can't change 2404 * without a recompile. 2405 */ 2406 2407 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2408 && (cdm->pos.cookie.pdrv != NULL)) 2409 ret = xptpdrvtraverse( 2410 (struct periph_driver **)cdm->pos.cookie.pdrv, 2411 xptplistpdrvfunc, cdm); 2412 else 2413 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2414 2415 /* 2416 * If we get back 0, that means that we had to stop before fully 2417 * traversing the peripheral driver tree. It also means that one of 2418 * the subroutines has set the status field to the proper value. If 2419 * we get back 1, we've fully traversed the EDT and copied out any 2420 * matching entries. 2421 */ 2422 if (ret == 1) 2423 cdm->status = CAM_DEV_MATCH_LAST; 2424 2425 return(ret); 2426} 2427 2428static int 2429xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2430{ 2431 struct cam_eb *bus, *next_bus; 2432 int retval; 2433 2434 retval = 1; 2435 2436 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2437 bus != NULL; 2438 bus = next_bus) { 2439 next_bus = TAILQ_NEXT(bus, links); 2440 2441 retval = tr_func(bus, arg); 2442 if (retval == 0) 2443 return(retval); 2444 } 2445 2446 return(retval); 2447} 2448 2449static int 2450xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2451 xpt_targetfunc_t *tr_func, void *arg) 2452{ 2453 struct cam_et *target, *next_target; 2454 int retval; 2455 2456 retval = 1; 2457 for (target = (start_target ? start_target : 2458 TAILQ_FIRST(&bus->et_entries)); 2459 target != NULL; target = next_target) { 2460 2461 next_target = TAILQ_NEXT(target, links); 2462 2463 retval = tr_func(target, arg); 2464 2465 if (retval == 0) 2466 return(retval); 2467 } 2468 2469 return(retval); 2470} 2471 2472static int 2473xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2474 xpt_devicefunc_t *tr_func, void *arg) 2475{ 2476 struct cam_ed *device, *next_device; 2477 int retval; 2478 2479 retval = 1; 2480 for (device = (start_device ? start_device : 2481 TAILQ_FIRST(&target->ed_entries)); 2482 device != NULL; 2483 device = next_device) { 2484 2485 next_device = TAILQ_NEXT(device, links); 2486 2487 retval = tr_func(device, arg); 2488 2489 if (retval == 0) 2490 return(retval); 2491 } 2492 2493 return(retval); 2494} 2495 2496static int 2497xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2498 xpt_periphfunc_t *tr_func, void *arg) 2499{ 2500 struct cam_periph *periph, *next_periph; 2501 int retval; 2502 2503 retval = 1; 2504 2505 for (periph = (start_periph ? start_periph : 2506 SLIST_FIRST(&device->periphs)); 2507 periph != NULL; 2508 periph = next_periph) { 2509 2510 next_periph = SLIST_NEXT(periph, periph_links); 2511 2512 retval = tr_func(periph, arg); 2513 if (retval == 0) 2514 return(retval); 2515 } 2516 2517 return(retval); 2518} 2519 2520static int 2521xptpdrvtraverse(struct periph_driver **start_pdrv, 2522 xpt_pdrvfunc_t *tr_func, void *arg) 2523{ 2524 struct periph_driver **pdrv; 2525 int retval; 2526 2527 retval = 1; 2528 2529 /* 2530 * We don't traverse the peripheral driver list like we do the 2531 * other lists, because it is a linker set, and therefore cannot be 2532 * changed during runtime. If the peripheral driver list is ever 2533 * re-done to be something other than a linker set (i.e. it can 2534 * change while the system is running), the list traversal should 2535 * be modified to work like the other traversal functions. 2536 */ 2537 for (pdrv = (start_pdrv ? start_pdrv : 2538 (struct periph_driver **)periphdriver_set.ls_items); 2539 *pdrv != NULL; pdrv++) { 2540 retval = tr_func(pdrv, arg); 2541 2542 if (retval == 0) 2543 return(retval); 2544 } 2545 2546 return(retval); 2547} 2548 2549static int 2550xptpdperiphtraverse(struct periph_driver **pdrv, 2551 struct cam_periph *start_periph, 2552 xpt_periphfunc_t *tr_func, void *arg) 2553{ 2554 struct cam_periph *periph, *next_periph; 2555 int retval; 2556 2557 retval = 1; 2558 2559 for (periph = (start_periph ? start_periph : 2560 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2561 periph = next_periph) { 2562 2563 next_periph = TAILQ_NEXT(periph, unit_links); 2564 2565 retval = tr_func(periph, arg); 2566 if (retval == 0) 2567 return(retval); 2568 } 2569 return(retval); 2570} 2571 2572static int 2573xptdefbusfunc(struct cam_eb *bus, void *arg) 2574{ 2575 struct xpt_traverse_config *tr_config; 2576 2577 tr_config = (struct xpt_traverse_config *)arg; 2578 2579 if (tr_config->depth == XPT_DEPTH_BUS) { 2580 xpt_busfunc_t *tr_func; 2581 2582 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2583 2584 return(tr_func(bus, tr_config->tr_arg)); 2585 } else 2586 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2587} 2588 2589static int 2590xptdeftargetfunc(struct cam_et *target, void *arg) 2591{ 2592 struct xpt_traverse_config *tr_config; 2593 2594 tr_config = (struct xpt_traverse_config *)arg; 2595 2596 if (tr_config->depth == XPT_DEPTH_TARGET) { 2597 xpt_targetfunc_t *tr_func; 2598 2599 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2600 2601 return(tr_func(target, tr_config->tr_arg)); 2602 } else 2603 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2604} 2605 2606static int 2607xptdefdevicefunc(struct cam_ed *device, void *arg) 2608{ 2609 struct xpt_traverse_config *tr_config; 2610 2611 tr_config = (struct xpt_traverse_config *)arg; 2612 2613 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2614 xpt_devicefunc_t *tr_func; 2615 2616 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2617 2618 return(tr_func(device, tr_config->tr_arg)); 2619 } else 2620 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2621} 2622 2623static int 2624xptdefperiphfunc(struct cam_periph *periph, void *arg) 2625{ 2626 struct xpt_traverse_config *tr_config; 2627 xpt_periphfunc_t *tr_func; 2628 2629 tr_config = (struct xpt_traverse_config *)arg; 2630 2631 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2632 2633 /* 2634 * Unlike the other default functions, we don't check for depth 2635 * here. The peripheral driver level is the last level in the EDT, 2636 * so if we're here, we should execute the function in question. 2637 */ 2638 return(tr_func(periph, tr_config->tr_arg)); 2639} 2640 2641/* 2642 * Execute the given function for every bus in the EDT. 2643 */ 2644static int 2645xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2646{ 2647 struct xpt_traverse_config tr_config; 2648 2649 tr_config.depth = XPT_DEPTH_BUS; 2650 tr_config.tr_func = tr_func; 2651 tr_config.tr_arg = arg; 2652 2653 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2654} 2655 2656#ifdef notusedyet 2657/* 2658 * Execute the given function for every target in the EDT. 2659 */ 2660static int 2661xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2662{ 2663 struct xpt_traverse_config tr_config; 2664 2665 tr_config.depth = XPT_DEPTH_TARGET; 2666 tr_config.tr_func = tr_func; 2667 tr_config.tr_arg = arg; 2668 2669 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2670} 2671#endif /* notusedyet */ 2672 2673/* 2674 * Execute the given function for every device in the EDT. 2675 */ 2676static int 2677xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2678{ 2679 struct xpt_traverse_config tr_config; 2680 2681 tr_config.depth = XPT_DEPTH_DEVICE; 2682 tr_config.tr_func = tr_func; 2683 tr_config.tr_arg = arg; 2684 2685 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2686} 2687 2688#ifdef notusedyet 2689/* 2690 * Execute the given function for every peripheral in the EDT. 2691 */ 2692static int 2693xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2694{ 2695 struct xpt_traverse_config tr_config; 2696 2697 tr_config.depth = XPT_DEPTH_PERIPH; 2698 tr_config.tr_func = tr_func; 2699 tr_config.tr_arg = arg; 2700 2701 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2702} 2703#endif /* notusedyet */ 2704 2705static int 2706xptsetasyncfunc(struct cam_ed *device, void *arg) 2707{ 2708 struct cam_path path; 2709 struct ccb_getdev cgd; 2710 struct async_node *cur_entry; 2711 2712 cur_entry = (struct async_node *)arg; 2713 2714 /* 2715 * Don't report unconfigured devices (Wildcard devs, 2716 * devices only for target mode, device instances 2717 * that have been invalidated but are waiting for 2718 * their last reference count to be released). 2719 */ 2720 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2721 return (1); 2722 2723 xpt_compile_path(&path, 2724 NULL, 2725 device->target->bus->path_id, 2726 device->target->target_id, 2727 device->lun_id); 2728 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2729 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2730 xpt_action((union ccb *)&cgd); 2731 cur_entry->callback(cur_entry->callback_arg, 2732 AC_FOUND_DEVICE, 2733 &path, &cgd); 2734 xpt_release_path(&path); 2735 2736 return(1); 2737} 2738 2739static int 2740xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2741{ 2742 struct cam_path path; 2743 struct ccb_pathinq cpi; 2744 struct async_node *cur_entry; 2745 2746 cur_entry = (struct async_node *)arg; 2747 2748 xpt_compile_path(&path, /*periph*/NULL, 2749 bus->sim->path_id, 2750 CAM_TARGET_WILDCARD, 2751 CAM_LUN_WILDCARD); 2752 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2753 cpi.ccb_h.func_code = XPT_PATH_INQ; 2754 xpt_action((union ccb *)&cpi); 2755 cur_entry->callback(cur_entry->callback_arg, 2756 AC_PATH_REGISTERED, 2757 &path, &cpi); 2758 xpt_release_path(&path); 2759 2760 return(1); 2761} 2762 2763void 2764xpt_action(union ccb *start_ccb) 2765{ 2766 int iopl; 2767 2768 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2769 2770 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2771 2772 iopl = splsoftcam(); 2773 switch (start_ccb->ccb_h.func_code) { 2774 case XPT_SCSI_IO: 2775 { 2776#ifdef CAMDEBUG 2777 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2778 struct cam_path *path; 2779 2780 path = start_ccb->ccb_h.path; 2781#endif 2782 2783 /* 2784 * For the sake of compatibility with SCSI-1 2785 * devices that may not understand the identify 2786 * message, we include lun information in the 2787 * second byte of all commands. SCSI-1 specifies 2788 * that luns are a 3 bit value and reserves only 3 2789 * bits for lun information in the CDB. Later 2790 * revisions of the SCSI spec allow for more than 8 2791 * luns, but have deprecated lun information in the 2792 * CDB. So, if the lun won't fit, we must omit. 2793 * 2794 * Also be aware that during initial probing for devices, 2795 * the inquiry information is unknown but initialized to 0. 2796 * This means that this code will be exercised while probing 2797 * devices with an ANSI revision greater than 2. 2798 */ 2799 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2800 && start_ccb->ccb_h.target_lun < 8 2801 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2802 2803 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2804 start_ccb->ccb_h.target_lun << 5; 2805 } 2806 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2807 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2808 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2809 &path->device->inq_data), 2810 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2811 cdb_str, sizeof(cdb_str)))); 2812 /* FALLTHROUGH */ 2813 } 2814 case XPT_TARGET_IO: 2815 case XPT_CONT_TARGET_IO: 2816 start_ccb->csio.sense_resid = 0; 2817 start_ccb->csio.resid = 0; 2818 /* FALLTHROUGH */ 2819 case XPT_RESET_DEV: 2820 case XPT_ENG_EXEC: 2821 { 2822 struct cam_path *path; 2823 int s; 2824 int runq; 2825 2826 path = start_ccb->ccb_h.path; 2827 s = splsoftcam(); 2828 2829 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2830 if (path->device->qfrozen_cnt == 0) 2831 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2832 else 2833 runq = 0; 2834 splx(s); 2835 if (runq != 0) 2836 xpt_run_dev_sendq(path->bus); 2837 break; 2838 } 2839 case XPT_SET_TRAN_SETTINGS: 2840 { 2841 xpt_set_transfer_settings(&start_ccb->cts, 2842 start_ccb->ccb_h.path->device, 2843 /*async_update*/FALSE); 2844 break; 2845 } 2846 case XPT_CALC_GEOMETRY: 2847 { 2848 struct cam_sim *sim; 2849 2850 /* Filter out garbage */ 2851 if (start_ccb->ccg.block_size == 0 2852 || start_ccb->ccg.volume_size == 0) { 2853 start_ccb->ccg.cylinders = 0; 2854 start_ccb->ccg.heads = 0; 2855 start_ccb->ccg.secs_per_track = 0; 2856 start_ccb->ccb_h.status = CAM_REQ_CMP; 2857 break; 2858 } 2859#ifdef PC98 2860 /* 2861 * In a PC-98 system, geometry translation depens on 2862 * the "real" device geometry obtained from mode page 4. 2863 * SCSI geometry translation is performed in the 2864 * initialization routine of the SCSI BIOS and the result 2865 * stored in host memory. If the translation is available 2866 * in host memory, use it. If not, rely on the default 2867 * translation the device driver performs. 2868 */ 2869 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2870 start_ccb->ccb_h.status = CAM_REQ_CMP; 2871 break; 2872 } 2873#endif 2874 sim = start_ccb->ccb_h.path->bus->sim; 2875 (*(sim->sim_action))(sim, start_ccb); 2876 break; 2877 } 2878 case XPT_ABORT: 2879 { 2880 union ccb* abort_ccb; 2881 int s; 2882 2883 abort_ccb = start_ccb->cab.abort_ccb; 2884 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2885 2886 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2887 struct cam_ccbq *ccbq; 2888 2889 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 2890 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2891 abort_ccb->ccb_h.status = 2892 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2893 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2894 s = splcam(); 2895 xpt_done(abort_ccb); 2896 splx(s); 2897 start_ccb->ccb_h.status = CAM_REQ_CMP; 2898 break; 2899 } 2900 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2901 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2902 /* 2903 * We've caught this ccb en route to 2904 * the SIM. Flag it for abort and the 2905 * SIM will do so just before starting 2906 * real work on the CCB. 2907 */ 2908 abort_ccb->ccb_h.status = 2909 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2910 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2911 start_ccb->ccb_h.status = CAM_REQ_CMP; 2912 break; 2913 } 2914 } 2915 if (XPT_FC_IS_QUEUED(abort_ccb) 2916 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2917 /* 2918 * It's already completed but waiting 2919 * for our SWI to get to it. 2920 */ 2921 start_ccb->ccb_h.status = CAM_UA_ABORT; 2922 break; 2923 } 2924 /* 2925 * If we weren't able to take care of the abort request 2926 * in the XPT, pass the request down to the SIM for processing. 2927 */ 2928 /* FALLTHROUGH */ 2929 } 2930 case XPT_ACCEPT_TARGET_IO: 2931 case XPT_EN_LUN: 2932 case XPT_IMMED_NOTIFY: 2933 case XPT_NOTIFY_ACK: 2934 case XPT_GET_TRAN_SETTINGS: 2935 case XPT_RESET_BUS: 2936 { 2937 struct cam_sim *sim; 2938 2939 sim = start_ccb->ccb_h.path->bus->sim; 2940 (*(sim->sim_action))(sim, start_ccb); 2941 break; 2942 } 2943 case XPT_PATH_INQ: 2944 { 2945 struct cam_sim *sim; 2946 2947 sim = start_ccb->ccb_h.path->bus->sim; 2948 (*(sim->sim_action))(sim, start_ccb); 2949 break; 2950 } 2951 case XPT_PATH_STATS: 2952 start_ccb->cpis.last_reset = 2953 start_ccb->ccb_h.path->bus->last_reset; 2954 start_ccb->ccb_h.status = CAM_REQ_CMP; 2955 break; 2956 case XPT_GDEV_TYPE: 2957 { 2958 struct cam_ed *dev; 2959 int s; 2960 2961 dev = start_ccb->ccb_h.path->device; 2962 s = splcam(); 2963 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2964 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2965 } else { 2966 struct ccb_getdev *cgd; 2967 struct cam_eb *bus; 2968 struct cam_et *tar; 2969 2970 cgd = &start_ccb->cgd; 2971 bus = cgd->ccb_h.path->bus; 2972 tar = cgd->ccb_h.path->target; 2973 cgd->inq_data = dev->inq_data; 2974 cgd->ccb_h.status = CAM_REQ_CMP; 2975 cgd->serial_num_len = dev->serial_num_len; 2976 if ((dev->serial_num_len > 0) 2977 && (dev->serial_num != NULL)) 2978 bcopy(dev->serial_num, cgd->serial_num, 2979 dev->serial_num_len); 2980 } 2981 splx(s); 2982 break; 2983 } 2984 case XPT_GDEV_STATS: 2985 { 2986 struct cam_ed *dev; 2987 int s; 2988 2989 dev = start_ccb->ccb_h.path->device; 2990 s = splcam(); 2991 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2992 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2993 } else { 2994 struct ccb_getdevstats *cgds; 2995 struct cam_eb *bus; 2996 struct cam_et *tar; 2997 2998 cgds = &start_ccb->cgds; 2999 bus = cgds->ccb_h.path->bus; 3000 tar = cgds->ccb_h.path->target; 3001 cgds->dev_openings = dev->ccbq.dev_openings; 3002 cgds->dev_active = dev->ccbq.dev_active; 3003 cgds->devq_openings = dev->ccbq.devq_openings; 3004 cgds->devq_queued = dev->ccbq.queue.entries; 3005 cgds->held = dev->ccbq.held; 3006 cgds->last_reset = tar->last_reset; 3007 cgds->maxtags = dev->quirk->maxtags; 3008 cgds->mintags = dev->quirk->mintags; 3009 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3010 cgds->last_reset = bus->last_reset; 3011 cgds->ccb_h.status = CAM_REQ_CMP; 3012 } 3013 splx(s); 3014 break; 3015 } 3016 case XPT_GDEVLIST: 3017 { 3018 struct cam_periph *nperiph; 3019 struct periph_list *periph_head; 3020 struct ccb_getdevlist *cgdl; 3021 int i; 3022 int s; 3023 struct cam_ed *device; 3024 int found; 3025 3026 3027 found = 0; 3028 3029 /* 3030 * Don't want anyone mucking with our data. 3031 */ 3032 s = splcam(); 3033 device = start_ccb->ccb_h.path->device; 3034 periph_head = &device->periphs; 3035 cgdl = &start_ccb->cgdl; 3036 3037 /* 3038 * Check and see if the list has changed since the user 3039 * last requested a list member. If so, tell them that the 3040 * list has changed, and therefore they need to start over 3041 * from the beginning. 3042 */ 3043 if ((cgdl->index != 0) && 3044 (cgdl->generation != device->generation)) { 3045 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3046 splx(s); 3047 break; 3048 } 3049 3050 /* 3051 * Traverse the list of peripherals and attempt to find 3052 * the requested peripheral. 3053 */ 3054 for (nperiph = periph_head->slh_first, i = 0; 3055 (nperiph != NULL) && (i <= cgdl->index); 3056 nperiph = nperiph->periph_links.sle_next, i++) { 3057 if (i == cgdl->index) { 3058 strncpy(cgdl->periph_name, 3059 nperiph->periph_name, 3060 DEV_IDLEN); 3061 cgdl->unit_number = nperiph->unit_number; 3062 found = 1; 3063 } 3064 } 3065 if (found == 0) { 3066 cgdl->status = CAM_GDEVLIST_ERROR; 3067 splx(s); 3068 break; 3069 } 3070 3071 if (nperiph == NULL) 3072 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3073 else 3074 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3075 3076 cgdl->index++; 3077 cgdl->generation = device->generation; 3078 3079 splx(s); 3080 cgdl->ccb_h.status = CAM_REQ_CMP; 3081 break; 3082 } 3083 case XPT_DEV_MATCH: 3084 { 3085 int s; 3086 dev_pos_type position_type; 3087 struct ccb_dev_match *cdm; 3088 int ret; 3089 3090 cdm = &start_ccb->cdm; 3091 3092 /* 3093 * Prevent EDT changes while we traverse it. 3094 */ 3095 s = splcam(); 3096 /* 3097 * There are two ways of getting at information in the EDT. 3098 * The first way is via the primary EDT tree. It starts 3099 * with a list of busses, then a list of targets on a bus, 3100 * then devices/luns on a target, and then peripherals on a 3101 * device/lun. The "other" way is by the peripheral driver 3102 * lists. The peripheral driver lists are organized by 3103 * peripheral driver. (obviously) So it makes sense to 3104 * use the peripheral driver list if the user is looking 3105 * for something like "da1", or all "da" devices. If the 3106 * user is looking for something on a particular bus/target 3107 * or lun, it's generally better to go through the EDT tree. 3108 */ 3109 3110 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3111 position_type = cdm->pos.position_type; 3112 else { 3113 int i; 3114 3115 position_type = CAM_DEV_POS_NONE; 3116 3117 for (i = 0; i < cdm->num_patterns; i++) { 3118 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3119 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3120 position_type = CAM_DEV_POS_EDT; 3121 break; 3122 } 3123 } 3124 3125 if (cdm->num_patterns == 0) 3126 position_type = CAM_DEV_POS_EDT; 3127 else if (position_type == CAM_DEV_POS_NONE) 3128 position_type = CAM_DEV_POS_PDRV; 3129 } 3130 3131 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3132 case CAM_DEV_POS_EDT: 3133 ret = xptedtmatch(cdm); 3134 break; 3135 case CAM_DEV_POS_PDRV: 3136 ret = xptperiphlistmatch(cdm); 3137 break; 3138 default: 3139 cdm->status = CAM_DEV_MATCH_ERROR; 3140 break; 3141 } 3142 3143 splx(s); 3144 3145 if (cdm->status == CAM_DEV_MATCH_ERROR) 3146 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3147 else 3148 start_ccb->ccb_h.status = CAM_REQ_CMP; 3149 3150 break; 3151 } 3152 case XPT_SASYNC_CB: 3153 { 3154 struct ccb_setasync *csa; 3155 struct async_node *cur_entry; 3156 struct async_list *async_head; 3157 u_int32_t added; 3158 int s; 3159 3160 csa = &start_ccb->csa; 3161 added = csa->event_enable; 3162 async_head = &csa->ccb_h.path->device->asyncs; 3163 3164 /* 3165 * If there is already an entry for us, simply 3166 * update it. 3167 */ 3168 s = splcam(); 3169 cur_entry = SLIST_FIRST(async_head); 3170 while (cur_entry != NULL) { 3171 if ((cur_entry->callback_arg == csa->callback_arg) 3172 && (cur_entry->callback == csa->callback)) 3173 break; 3174 cur_entry = SLIST_NEXT(cur_entry, links); 3175 } 3176 3177 if (cur_entry != NULL) { 3178 /* 3179 * If the request has no flags set, 3180 * remove the entry. 3181 */ 3182 added &= ~cur_entry->event_enable; 3183 if (csa->event_enable == 0) { 3184 SLIST_REMOVE(async_head, cur_entry, 3185 async_node, links); 3186 csa->ccb_h.path->device->refcount--; 3187 free(cur_entry, M_DEVBUF); 3188 } else { 3189 cur_entry->event_enable = csa->event_enable; 3190 } 3191 } else { 3192 cur_entry = malloc(sizeof(*cur_entry), M_DEVBUF, 3193 M_NOWAIT); 3194 if (cur_entry == NULL) { 3195 splx(s); 3196 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 3197 break; 3198 } 3199 cur_entry->event_enable = csa->event_enable; 3200 cur_entry->callback_arg = csa->callback_arg; 3201 cur_entry->callback = csa->callback; 3202 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3203 csa->ccb_h.path->device->refcount++; 3204 } 3205 3206 if ((added & AC_FOUND_DEVICE) != 0) { 3207 /* 3208 * Get this peripheral up to date with all 3209 * the currently existing devices. 3210 */ 3211 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3212 } 3213 if ((added & AC_PATH_REGISTERED) != 0) { 3214 /* 3215 * Get this peripheral up to date with all 3216 * the currently existing busses. 3217 */ 3218 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3219 } 3220 splx(s); 3221 start_ccb->ccb_h.status = CAM_REQ_CMP; 3222 break; 3223 } 3224 case XPT_REL_SIMQ: 3225 { 3226 struct ccb_relsim *crs; 3227 struct cam_ed *dev; 3228 int s; 3229 3230 crs = &start_ccb->crs; 3231 dev = crs->ccb_h.path->device; 3232 if (dev == NULL) { 3233 3234 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3235 break; 3236 } 3237 3238 s = splcam(); 3239 3240 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3241 3242 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3243 3244 /* Don't ever go below one opening */ 3245 if (crs->openings > 0) { 3246 xpt_dev_ccbq_resize(crs->ccb_h.path, 3247 crs->openings); 3248 3249 if (bootverbose) { 3250 xpt_print_path(crs->ccb_h.path); 3251 printf("tagged openings " 3252 "now %d\n", 3253 crs->openings); 3254 } 3255 } 3256 } 3257 } 3258 3259 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3260 3261 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3262 3263 /* 3264 * Just extend the old timeout and decrement 3265 * the freeze count so that a single timeout 3266 * is sufficient for releasing the queue. 3267 */ 3268 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3269 untimeout(xpt_release_devq_timeout, 3270 dev, dev->c_handle); 3271 } else { 3272 3273 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3274 } 3275 3276 dev->c_handle = 3277 timeout(xpt_release_devq_timeout, 3278 dev, 3279 (crs->release_timeout * hz) / 1000); 3280 3281 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3282 3283 } 3284 3285 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3286 3287 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3288 /* 3289 * Decrement the freeze count so that a single 3290 * completion is still sufficient to unfreeze 3291 * the queue. 3292 */ 3293 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3294 } else { 3295 3296 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3297 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3298 } 3299 } 3300 3301 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3302 3303 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3304 || (dev->ccbq.dev_active == 0)) { 3305 3306 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3307 } else { 3308 3309 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3310 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3311 } 3312 } 3313 splx(s); 3314 3315 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3316 3317 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3318 /*run_queue*/TRUE); 3319 } 3320 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3321 start_ccb->ccb_h.status = CAM_REQ_CMP; 3322 break; 3323 } 3324 case XPT_SCAN_BUS: 3325 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3326 break; 3327 case XPT_SCAN_LUN: 3328 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3329 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3330 start_ccb); 3331 break; 3332 case XPT_DEBUG: { 3333#ifdef CAMDEBUG 3334 int s; 3335 3336 s = splcam(); 3337#ifdef CAM_DEBUG_DELAY 3338 cam_debug_delay = CAM_DEBUG_DELAY; 3339#endif 3340 cam_dflags = start_ccb->cdbg.flags; 3341 if (cam_dpath != NULL) { 3342 xpt_free_path(cam_dpath); 3343 cam_dpath = NULL; 3344 } 3345 3346 if (cam_dflags != CAM_DEBUG_NONE) { 3347 if (xpt_create_path(&cam_dpath, xpt_periph, 3348 start_ccb->ccb_h.path_id, 3349 start_ccb->ccb_h.target_id, 3350 start_ccb->ccb_h.target_lun) != 3351 CAM_REQ_CMP) { 3352 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3353 cam_dflags = CAM_DEBUG_NONE; 3354 } else { 3355 start_ccb->ccb_h.status = CAM_REQ_CMP; 3356 xpt_print_path(cam_dpath); 3357 printf("debugging flags now %x\n", cam_dflags); 3358 } 3359 } else { 3360 cam_dpath = NULL; 3361 start_ccb->ccb_h.status = CAM_REQ_CMP; 3362 } 3363 splx(s); 3364#else /* !CAMDEBUG */ 3365 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3366#endif /* CAMDEBUG */ 3367 break; 3368 } 3369 case XPT_NOOP: 3370 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3371 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3372 start_ccb->ccb_h.status = CAM_REQ_CMP; 3373 break; 3374 default: 3375 case XPT_SDEV_TYPE: 3376 case XPT_TERM_IO: 3377 case XPT_ENG_INQ: 3378 /* XXX Implement */ 3379 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3380 break; 3381 } 3382 splx(iopl); 3383} 3384 3385void 3386xpt_polled_action(union ccb *start_ccb) 3387{ 3388 int s; 3389 u_int32_t timeout; 3390 struct cam_sim *sim; 3391 struct cam_devq *devq; 3392 struct cam_ed *dev; 3393 3394 timeout = start_ccb->ccb_h.timeout; 3395 sim = start_ccb->ccb_h.path->bus->sim; 3396 devq = sim->devq; 3397 dev = start_ccb->ccb_h.path->device; 3398 3399 s = splcam(); 3400 3401 /* 3402 * Steal an opening so that no other queued requests 3403 * can get it before us while we simulate interrupts. 3404 */ 3405 dev->ccbq.devq_openings--; 3406 dev->ccbq.dev_openings--; 3407 3408 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) 3409 && (--timeout > 0)) { 3410 DELAY(1000); 3411 (*(sim->sim_poll))(sim); 3412 camisr(&cam_netq); 3413 camisr(&cam_bioq); 3414 } 3415 3416 dev->ccbq.devq_openings++; 3417 dev->ccbq.dev_openings++; 3418 3419 if (timeout != 0) { 3420 xpt_action(start_ccb); 3421 while(--timeout > 0) { 3422 (*(sim->sim_poll))(sim); 3423 camisr(&cam_netq); 3424 camisr(&cam_bioq); 3425 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3426 != CAM_REQ_INPROG) 3427 break; 3428 DELAY(1000); 3429 } 3430 if (timeout == 0) { 3431 /* 3432 * XXX Is it worth adding a sim_timeout entry 3433 * point so we can attempt recovery? If 3434 * this is only used for dumps, I don't think 3435 * it is. 3436 */ 3437 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3438 } 3439 } else { 3440 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3441 } 3442 splx(s); 3443} 3444 3445/* 3446 * Schedule a peripheral driver to receive a ccb when it's 3447 * target device has space for more transactions. 3448 */ 3449void 3450xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3451{ 3452 struct cam_ed *device; 3453 int s; 3454 int runq; 3455 3456 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3457 device = perph->path->device; 3458 s = splsoftcam(); 3459 if (periph_is_queued(perph)) { 3460 /* Simply reorder based on new priority */ 3461 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3462 (" change priority to %d\n", new_priority)); 3463 if (new_priority < perph->pinfo.priority) { 3464 camq_change_priority(&device->drvq, 3465 perph->pinfo.index, 3466 new_priority); 3467 } 3468 runq = 0; 3469 } else { 3470 /* New entry on the queue */ 3471 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3472 (" added periph to queue\n")); 3473 perph->pinfo.priority = new_priority; 3474 perph->pinfo.generation = ++device->drvq.generation; 3475 camq_insert(&device->drvq, &perph->pinfo); 3476 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3477 } 3478 splx(s); 3479 if (runq != 0) { 3480 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3481 (" calling xpt_run_devq\n")); 3482 xpt_run_dev_allocq(perph->path->bus); 3483 } 3484} 3485 3486 3487/* 3488 * Schedule a device to run on a given queue. 3489 * If the device was inserted as a new entry on the queue, 3490 * return 1 meaning the device queue should be run. If we 3491 * were already queued, implying someone else has already 3492 * started the queue, return 0 so the caller doesn't attempt 3493 * to run the queue. Must be run at either splsoftcam 3494 * (or splcam since that encompases splsoftcam). 3495 */ 3496static int 3497xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3498 u_int32_t new_priority) 3499{ 3500 int retval; 3501 u_int32_t old_priority; 3502 3503 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3504 3505 old_priority = pinfo->priority; 3506 3507 /* 3508 * Are we already queued? 3509 */ 3510 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3511 /* Simply reorder based on new priority */ 3512 if (new_priority < old_priority) { 3513 camq_change_priority(queue, pinfo->index, 3514 new_priority); 3515 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3516 ("changed priority to %d\n", 3517 new_priority)); 3518 } 3519 retval = 0; 3520 } else { 3521 /* New entry on the queue */ 3522 if (new_priority < old_priority) 3523 pinfo->priority = new_priority; 3524 3525 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3526 ("Inserting onto queue\n")); 3527 pinfo->generation = ++queue->generation; 3528 camq_insert(queue, pinfo); 3529 retval = 1; 3530 } 3531 return (retval); 3532} 3533 3534static void 3535xpt_run_dev_allocq(struct cam_eb *bus) 3536{ 3537 struct cam_devq *devq; 3538 int s; 3539 3540 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3541 devq = bus->sim->devq; 3542 3543 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3544 (" qfrozen_cnt == 0x%x, entries == %d, " 3545 "openings == %d, active == %d\n", 3546 devq->alloc_queue.qfrozen_cnt, 3547 devq->alloc_queue.entries, 3548 devq->alloc_openings, 3549 devq->alloc_active)); 3550 3551 s = splsoftcam(); 3552 devq->alloc_queue.qfrozen_cnt++; 3553 while ((devq->alloc_queue.entries > 0) 3554 && (devq->alloc_openings > 0) 3555 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3556 struct cam_ed_qinfo *qinfo; 3557 struct cam_ed *device; 3558 union ccb *work_ccb; 3559 struct cam_periph *drv; 3560 struct camq *drvq; 3561 3562 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3563 CAMQ_HEAD); 3564 device = qinfo->device; 3565 3566 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3567 ("running device %p\n", device)); 3568 3569 drvq = &device->drvq; 3570 3571#ifdef CAMDEBUG 3572 if (drvq->entries <= 0) { 3573 panic("xpt_run_dev_allocq: " 3574 "Device on queue without any work to do"); 3575 } 3576#endif 3577 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3578 devq->alloc_openings--; 3579 devq->alloc_active++; 3580 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3581 splx(s); 3582 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3583 drv->pinfo.priority); 3584 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3585 ("calling periph start\n")); 3586 drv->periph_start(drv, work_ccb); 3587 } else { 3588 /* 3589 * Malloc failure in alloc_ccb 3590 */ 3591 /* 3592 * XXX add us to a list to be run from free_ccb 3593 * if we don't have any ccbs active on this 3594 * device queue otherwise we may never get run 3595 * again. 3596 */ 3597 break; 3598 } 3599 3600 /* Raise IPL for possible insertion and test at top of loop */ 3601 s = splsoftcam(); 3602 3603 if (drvq->entries > 0) { 3604 /* We have more work. Attempt to reschedule */ 3605 xpt_schedule_dev_allocq(bus, device); 3606 } 3607 } 3608 devq->alloc_queue.qfrozen_cnt--; 3609 splx(s); 3610} 3611 3612static void 3613xpt_run_dev_sendq(struct cam_eb *bus) 3614{ 3615 struct cam_devq *devq; 3616 int s; 3617 3618 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3619 3620 devq = bus->sim->devq; 3621 3622 s = splcam(); 3623 devq->send_queue.qfrozen_cnt++; 3624 splx(s); 3625 s = splsoftcam(); 3626 while ((devq->send_queue.entries > 0) 3627 && (devq->send_openings > 0)) { 3628 struct cam_ed_qinfo *qinfo; 3629 struct cam_ed *device; 3630 union ccb *work_ccb; 3631 struct cam_sim *sim; 3632 int ospl; 3633 3634 ospl = splcam(); 3635 if (devq->send_queue.qfrozen_cnt > 1) { 3636 splx(ospl); 3637 break; 3638 } 3639 3640 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3641 CAMQ_HEAD); 3642 device = qinfo->device; 3643 3644 /* 3645 * If the device has been "frozen", don't attempt 3646 * to run it. 3647 */ 3648 if (device->qfrozen_cnt > 0) { 3649 splx(ospl); 3650 continue; 3651 } 3652 3653 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3654 ("running device %p\n", device)); 3655 3656 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3657 if (work_ccb == NULL) { 3658 printf("device on run queue with no ccbs???"); 3659 splx(ospl); 3660 continue; 3661 } 3662 3663 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3664 3665 if (num_highpower <= 0) { 3666 /* 3667 * We got a high power command, but we 3668 * don't have any available slots. Freeze 3669 * the device queue until we have a slot 3670 * available. 3671 */ 3672 device->qfrozen_cnt++; 3673 STAILQ_INSERT_TAIL(&highpowerq, 3674 &work_ccb->ccb_h, 3675 xpt_links.stqe); 3676 3677 splx(ospl); 3678 continue; 3679 } else { 3680 /* 3681 * Consume a high power slot while 3682 * this ccb runs. 3683 */ 3684 num_highpower--; 3685 } 3686 } 3687 devq->active_dev = device; 3688 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3689 3690 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3691 splx(ospl); 3692 3693 devq->send_openings--; 3694 devq->send_active++; 3695 3696 if (device->ccbq.queue.entries > 0) 3697 xpt_schedule_dev_sendq(bus, device); 3698 3699 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3700 /* 3701 * The client wants to freeze the queue 3702 * after this CCB is sent. 3703 */ 3704 ospl = splcam(); 3705 device->qfrozen_cnt++; 3706 splx(ospl); 3707 } 3708 3709 splx(s); 3710 3711 /* In Target mode, the peripheral driver knows best... */ 3712 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3713 if ((device->inq_flags & SID_CmdQue) != 0 3714 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3715 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3716 else 3717 /* 3718 * Clear this in case of a retried CCB that 3719 * failed due to a rejected tag. 3720 */ 3721 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3722 } 3723 3724 /* 3725 * Device queues can be shared among multiple sim instances 3726 * that reside on different busses. Use the SIM in the queue 3727 * CCB's path, rather than the one in the bus that was passed 3728 * into this function. 3729 */ 3730 sim = work_ccb->ccb_h.path->bus->sim; 3731 (*(sim->sim_action))(sim, work_ccb); 3732 3733 ospl = splcam(); 3734 devq->active_dev = NULL; 3735 splx(ospl); 3736 /* Raise IPL for possible insertion and test at top of loop */ 3737 s = splsoftcam(); 3738 } 3739 splx(s); 3740 s = splcam(); 3741 devq->send_queue.qfrozen_cnt--; 3742 splx(s); 3743} 3744 3745/* 3746 * This function merges stuff from the slave ccb into the master ccb, while 3747 * keeping important fields in the master ccb constant. 3748 */ 3749void 3750xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3751{ 3752 /* 3753 * Pull fields that are valid for peripheral drivers to set 3754 * into the master CCB along with the CCB "payload". 3755 */ 3756 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3757 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3758 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3759 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3760 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3761 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3762} 3763 3764void 3765xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3766{ 3767 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3768 ccb_h->pinfo.priority = priority; 3769 ccb_h->path = path; 3770 ccb_h->path_id = path->bus->path_id; 3771 if (path->target) 3772 ccb_h->target_id = path->target->target_id; 3773 else 3774 ccb_h->target_id = CAM_TARGET_WILDCARD; 3775 if (path->device) { 3776 ccb_h->target_lun = path->device->lun_id; 3777 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3778 } else { 3779 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3780 } 3781 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3782 ccb_h->flags = 0; 3783} 3784 3785/* Path manipulation functions */ 3786cam_status 3787xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3788 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3789{ 3790 struct cam_path *path; 3791 cam_status status; 3792 3793 path = (struct cam_path *)malloc(sizeof(*path), M_DEVBUF, M_NOWAIT); 3794 3795 if (path == NULL) { 3796 status = CAM_RESRC_UNAVAIL; 3797 return(status); 3798 } 3799 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3800 if (status != CAM_REQ_CMP) { 3801 free(path, M_DEVBUF); 3802 path = NULL; 3803 } 3804 *new_path_ptr = path; 3805 return (status); 3806} 3807 3808static cam_status 3809xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3810 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3811{ 3812 struct cam_eb *bus; 3813 struct cam_et *target; 3814 struct cam_ed *device; 3815 cam_status status; 3816 int s; 3817 3818 status = CAM_REQ_CMP; /* Completed without error */ 3819 target = NULL; /* Wildcarded */ 3820 device = NULL; /* Wildcarded */ 3821 3822 /* 3823 * We will potentially modify the EDT, so block interrupts 3824 * that may attempt to create cam paths. 3825 */ 3826 s = splcam(); 3827 bus = xpt_find_bus(path_id); 3828 if (bus == NULL) { 3829 status = CAM_PATH_INVALID; 3830 } else { 3831 target = xpt_find_target(bus, target_id); 3832 if (target == NULL) { 3833 /* Create one */ 3834 struct cam_et *new_target; 3835 3836 new_target = xpt_alloc_target(bus, target_id); 3837 if (new_target == NULL) { 3838 status = CAM_RESRC_UNAVAIL; 3839 } else { 3840 target = new_target; 3841 } 3842 } 3843 if (target != NULL) { 3844 device = xpt_find_device(target, lun_id); 3845 if (device == NULL) { 3846 /* Create one */ 3847 struct cam_ed *new_device; 3848 3849 new_device = xpt_alloc_device(bus, 3850 target, 3851 lun_id); 3852 if (new_device == NULL) { 3853 status = CAM_RESRC_UNAVAIL; 3854 } else { 3855 device = new_device; 3856 } 3857 } 3858 } 3859 } 3860 splx(s); 3861 3862 /* 3863 * Only touch the user's data if we are successful. 3864 */ 3865 if (status == CAM_REQ_CMP) { 3866 new_path->periph = perph; 3867 new_path->bus = bus; 3868 new_path->target = target; 3869 new_path->device = device; 3870 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3871 } else { 3872 if (device != NULL) 3873 xpt_release_device(bus, target, device); 3874 if (target != NULL) 3875 xpt_release_target(bus, target); 3876 if (bus != NULL) 3877 xpt_release_bus(bus); 3878 } 3879 return (status); 3880} 3881 3882static void 3883xpt_release_path(struct cam_path *path) 3884{ 3885 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3886 if (path->device != NULL) { 3887 xpt_release_device(path->bus, path->target, path->device); 3888 path->device = NULL; 3889 } 3890 if (path->target != NULL) { 3891 xpt_release_target(path->bus, path->target); 3892 path->target = NULL; 3893 } 3894 if (path->bus != NULL) { 3895 xpt_release_bus(path->bus); 3896 path->bus = NULL; 3897 } 3898} 3899 3900void 3901xpt_free_path(struct cam_path *path) 3902{ 3903 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3904 xpt_release_path(path); 3905 free(path, M_DEVBUF); 3906} 3907 3908 3909/* 3910 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3911 * in path1, 2 for match with wildcards in path2. 3912 */ 3913int 3914xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3915{ 3916 int retval = 0; 3917 3918 if (path1->bus != path2->bus) { 3919 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3920 retval = 1; 3921 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3922 retval = 2; 3923 else 3924 return (-1); 3925 } 3926 if (path1->target != path2->target) { 3927 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3928 if (retval == 0) 3929 retval = 1; 3930 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3931 retval = 2; 3932 else 3933 return (-1); 3934 } 3935 if (path1->device != path2->device) { 3936 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3937 if (retval == 0) 3938 retval = 1; 3939 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3940 retval = 2; 3941 else 3942 return (-1); 3943 } 3944 return (retval); 3945} 3946 3947void 3948xpt_print_path(struct cam_path *path) 3949{ 3950 if (path == NULL) 3951 printf("(nopath): "); 3952 else { 3953 if (path->periph != NULL) 3954 printf("(%s%d:", path->periph->periph_name, 3955 path->periph->unit_number); 3956 else 3957 printf("(noperiph:"); 3958 3959 if (path->bus != NULL) 3960 printf("%s%d:%d:", path->bus->sim->sim_name, 3961 path->bus->sim->unit_number, 3962 path->bus->sim->bus_id); 3963 else 3964 printf("nobus:"); 3965 3966 if (path->target != NULL) 3967 printf("%d:", path->target->target_id); 3968 else 3969 printf("X:"); 3970 3971 if (path->device != NULL) 3972 printf("%d): ", path->device->lun_id); 3973 else 3974 printf("X): "); 3975 } 3976} 3977 3978path_id_t 3979xpt_path_path_id(struct cam_path *path) 3980{ 3981 return(path->bus->path_id); 3982} 3983 3984target_id_t 3985xpt_path_target_id(struct cam_path *path) 3986{ 3987 if (path->target != NULL) 3988 return (path->target->target_id); 3989 else 3990 return (CAM_TARGET_WILDCARD); 3991} 3992 3993lun_id_t 3994xpt_path_lun_id(struct cam_path *path) 3995{ 3996 if (path->device != NULL) 3997 return (path->device->lun_id); 3998 else 3999 return (CAM_LUN_WILDCARD); 4000} 4001 4002struct cam_sim * 4003xpt_path_sim(struct cam_path *path) 4004{ 4005 return (path->bus->sim); 4006} 4007 4008struct cam_periph* 4009xpt_path_periph(struct cam_path *path) 4010{ 4011 return (path->periph); 4012} 4013 4014/* 4015 * Release a CAM control block for the caller. Remit the cost of the structure 4016 * to the device referenced by the path. If the this device had no 'credits' 4017 * and peripheral drivers have registered async callbacks for this notification 4018 * call them now. 4019 */ 4020void 4021xpt_release_ccb(union ccb *free_ccb) 4022{ 4023 int s; 4024 struct cam_path *path; 4025 struct cam_ed *device; 4026 struct cam_eb *bus; 4027 4028 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4029 path = free_ccb->ccb_h.path; 4030 device = path->device; 4031 bus = path->bus; 4032 s = splsoftcam(); 4033 cam_ccbq_release_opening(&device->ccbq); 4034 if (xpt_ccb_count > xpt_max_ccbs) { 4035 xpt_free_ccb(free_ccb); 4036 xpt_ccb_count--; 4037 } else { 4038 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 4039 } 4040 bus->sim->devq->alloc_openings++; 4041 bus->sim->devq->alloc_active--; 4042 /* XXX Turn this into an inline function - xpt_run_device?? */ 4043 if ((device_is_alloc_queued(device) == 0) 4044 && (device->drvq.entries > 0)) { 4045 xpt_schedule_dev_allocq(bus, device); 4046 } 4047 splx(s); 4048 if (dev_allocq_is_runnable(bus->sim->devq)) 4049 xpt_run_dev_allocq(bus); 4050} 4051 4052/* Functions accessed by SIM drivers */ 4053 4054/* 4055 * A sim structure, listing the SIM entry points and instance 4056 * identification info is passed to xpt_bus_register to hook the SIM 4057 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4058 * for this new bus and places it in the array of busses and assigns 4059 * it a path_id. The path_id may be influenced by "hard wiring" 4060 * information specified by the user. Once interrupt services are 4061 * availible, the bus will be probed. 4062 */ 4063int32_t 4064xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4065{ 4066 struct cam_eb *new_bus; 4067 struct cam_eb *old_bus; 4068 struct ccb_pathinq cpi; 4069 int s; 4070 4071 sim->bus_id = bus; 4072 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 4073 M_DEVBUF, M_NOWAIT); 4074 if (new_bus == NULL) { 4075 /* Couldn't satisfy request */ 4076 return (CAM_RESRC_UNAVAIL); 4077 } 4078 4079 if (strcmp(sim->sim_name, "xpt") != 0) { 4080 4081 sim->path_id = 4082 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4083 } 4084 4085 TAILQ_INIT(&new_bus->et_entries); 4086 new_bus->path_id = sim->path_id; 4087 new_bus->sim = sim; 4088 timevalclear(&new_bus->last_reset); 4089 new_bus->flags = 0; 4090 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4091 new_bus->generation = 0; 4092 s = splcam(); 4093 old_bus = TAILQ_FIRST(&xpt_busses); 4094 while (old_bus != NULL 4095 && old_bus->path_id < new_bus->path_id) 4096 old_bus = TAILQ_NEXT(old_bus, links); 4097 if (old_bus != NULL) 4098 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4099 else 4100 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 4101 bus_generation++; 4102 splx(s); 4103 4104 /* Notify interested parties */ 4105 if (sim->path_id != CAM_XPT_PATH_ID) { 4106 struct cam_path path; 4107 4108 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4109 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4110 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4111 cpi.ccb_h.func_code = XPT_PATH_INQ; 4112 xpt_action((union ccb *)&cpi); 4113 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi); 4114 xpt_release_path(&path); 4115 } 4116 return (CAM_SUCCESS); 4117} 4118 4119int32_t 4120xpt_bus_deregister(path_id_t pathid) 4121{ 4122 struct cam_path bus_path; 4123 cam_status status; 4124 4125 status = xpt_compile_path(&bus_path, NULL, pathid, 4126 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4127 if (status != CAM_REQ_CMP) 4128 return (status); 4129 4130 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4131 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4132 4133 /* Release the reference count held while registered. */ 4134 xpt_release_bus(bus_path.bus); 4135 xpt_release_path(&bus_path); 4136 4137 return (CAM_REQ_CMP); 4138} 4139 4140static path_id_t 4141xptnextfreepathid(void) 4142{ 4143 struct cam_eb *bus; 4144 path_id_t pathid; 4145 char *strval; 4146 4147 pathid = 0; 4148 bus = TAILQ_FIRST(&xpt_busses); 4149retry: 4150 /* Find an unoccupied pathid */ 4151 while (bus != NULL 4152 && bus->path_id <= pathid) { 4153 if (bus->path_id == pathid) 4154 pathid++; 4155 bus = TAILQ_NEXT(bus, links); 4156 } 4157 4158 /* 4159 * Ensure that this pathid is not reserved for 4160 * a bus that may be registered in the future. 4161 */ 4162 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4163 ++pathid; 4164 /* Start the search over */ 4165 goto retry; 4166 } 4167 return (pathid); 4168} 4169 4170static path_id_t 4171xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4172{ 4173 path_id_t pathid; 4174 int i, dunit, val; 4175 char buf[32]; 4176 4177 pathid = CAM_XPT_PATH_ID; 4178 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4179 i = -1; 4180 while ((i = resource_query_string(i, "at", buf)) != -1) { 4181 if (strcmp(resource_query_name(i), "scbus")) { 4182 /* Avoid a bit of foot shooting. */ 4183 continue; 4184 } 4185 dunit = resource_query_unit(i); 4186 if (dunit < 0) /* unwired?! */ 4187 continue; 4188 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4189 if (sim_bus == val) { 4190 pathid = dunit; 4191 break; 4192 } 4193 } else if (sim_bus == 0) { 4194 /* Unspecified matches bus 0 */ 4195 pathid = dunit; 4196 break; 4197 } else { 4198 printf("Ambiguous scbus configuration for %s%d " 4199 "bus %d, cannot wire down. The kernel " 4200 "config entry for scbus%d should " 4201 "specify a controller bus.\n" 4202 "Scbus will be assigned dynamically.\n", 4203 sim_name, sim_unit, sim_bus, dunit); 4204 break; 4205 } 4206 } 4207 4208 if (pathid == CAM_XPT_PATH_ID) 4209 pathid = xptnextfreepathid(); 4210 return (pathid); 4211} 4212 4213void 4214xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4215{ 4216 struct cam_eb *bus; 4217 struct cam_et *target, *next_target; 4218 struct cam_ed *device, *next_device; 4219 int s; 4220 4221 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4222 4223 /* 4224 * Most async events come from a CAM interrupt context. In 4225 * a few cases, the error recovery code at the peripheral layer, 4226 * which may run from our SWI or a process context, may signal 4227 * deferred events with a call to xpt_async. Ensure async 4228 * notifications are serialized by blocking cam interrupts. 4229 */ 4230 s = splcam(); 4231 4232 bus = path->bus; 4233 4234 if (async_code == AC_BUS_RESET) { 4235 int s; 4236 4237 s = splclock(); 4238 /* Update our notion of when the last reset occurred */ 4239 microtime(&bus->last_reset); 4240 splx(s); 4241 } 4242 4243 for (target = TAILQ_FIRST(&bus->et_entries); 4244 target != NULL; 4245 target = next_target) { 4246 4247 next_target = TAILQ_NEXT(target, links); 4248 4249 if (path->target != target 4250 && path->target->target_id != CAM_TARGET_WILDCARD) 4251 continue; 4252 4253 if (async_code == AC_SENT_BDR) { 4254 int s; 4255 4256 /* Update our notion of when the last reset occurred */ 4257 s = splclock(); 4258 microtime(&path->target->last_reset); 4259 splx(s); 4260 } 4261 4262 for (device = TAILQ_FIRST(&target->ed_entries); 4263 device != NULL; 4264 device = next_device) { 4265 cam_status status; 4266 struct cam_path newpath; 4267 4268 next_device = TAILQ_NEXT(device, links); 4269 4270 if (path->device != device 4271 && path->device->lun_id != CAM_LUN_WILDCARD) 4272 continue; 4273 4274 /* 4275 * We need our own path with wildcards expanded to 4276 * handle certain types of events. 4277 */ 4278 if ((async_code == AC_SENT_BDR) 4279 || (async_code == AC_BUS_RESET) 4280 || (async_code == AC_INQ_CHANGED)) 4281 status = xpt_compile_path(&newpath, NULL, 4282 bus->path_id, 4283 target->target_id, 4284 device->lun_id); 4285 else 4286 status = CAM_REQ_CMP_ERR; 4287 4288 if (status == CAM_REQ_CMP) { 4289 4290 /* 4291 * Allow transfer negotiation to occur in a 4292 * tag free environment. 4293 */ 4294 if (async_code == AC_SENT_BDR 4295 || async_code == AC_BUS_RESET) 4296 xpt_toggle_tags(&newpath); 4297 4298 if (async_code == AC_INQ_CHANGED) { 4299 /* 4300 * We've sent a start unit command, or 4301 * something similar to a device that 4302 * may have caused its inquiry data to 4303 * change. So we re-scan the device to 4304 * refresh the inquiry data for it. 4305 */ 4306 xpt_scan_lun(newpath.periph, &newpath, 4307 CAM_EXPECT_INQ_CHANGE, 4308 NULL); 4309 } 4310 xpt_release_path(&newpath); 4311 } else if (async_code == AC_LOST_DEVICE) { 4312 device->flags |= CAM_DEV_UNCONFIGURED; 4313 } else if (async_code == AC_TRANSFER_NEG) { 4314 struct ccb_trans_settings *settings; 4315 4316 settings = 4317 (struct ccb_trans_settings *)async_arg; 4318 xpt_set_transfer_settings(settings, device, 4319 /*async_update*/TRUE); 4320 } 4321 4322 xpt_async_bcast(&device->asyncs, 4323 async_code, 4324 path, 4325 async_arg); 4326 } 4327 } 4328 4329 /* 4330 * If this wasn't a fully wildcarded async, tell all 4331 * clients that want all async events. 4332 */ 4333 if (bus != xpt_periph->path->bus) 4334 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4335 path, async_arg); 4336 splx(s); 4337} 4338 4339static void 4340xpt_async_bcast(struct async_list *async_head, 4341 u_int32_t async_code, 4342 struct cam_path *path, void *async_arg) 4343{ 4344 struct async_node *cur_entry; 4345 4346 cur_entry = SLIST_FIRST(async_head); 4347 while (cur_entry != NULL) { 4348 struct async_node *next_entry; 4349 /* 4350 * Grab the next list entry before we call the current 4351 * entry's callback. This is because the callback function 4352 * can delete its async callback entry. 4353 */ 4354 next_entry = SLIST_NEXT(cur_entry, links); 4355 if ((cur_entry->event_enable & async_code) != 0) 4356 cur_entry->callback(cur_entry->callback_arg, 4357 async_code, path, 4358 async_arg); 4359 cur_entry = next_entry; 4360 } 4361} 4362 4363u_int32_t 4364xpt_freeze_devq(struct cam_path *path, u_int count) 4365{ 4366 int s; 4367 struct ccb_hdr *ccbh; 4368 4369 s = splcam(); 4370 path->device->qfrozen_cnt += count; 4371 4372 /* 4373 * Mark the last CCB in the queue as needing 4374 * to be requeued if the driver hasn't 4375 * changed it's state yet. This fixes a race 4376 * where a ccb is just about to be queued to 4377 * a controller driver when it's interrupt routine 4378 * freezes the queue. To completly close the 4379 * hole, controller drives must check to see 4380 * if a ccb's status is still CAM_REQ_INPROG 4381 * under spl protection just before they queue 4382 * the CCB. See ahc_action/ahc_freeze_devq for 4383 * an example. 4384 */ 4385 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4386 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4387 ccbh->status = CAM_REQUEUE_REQ; 4388 splx(s); 4389 return (path->device->qfrozen_cnt); 4390} 4391 4392u_int32_t 4393xpt_freeze_simq(struct cam_sim *sim, u_int count) 4394{ 4395 sim->devq->send_queue.qfrozen_cnt += count; 4396 if (sim->devq->active_dev != NULL) { 4397 struct ccb_hdr *ccbh; 4398 4399 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4400 ccb_hdr_tailq); 4401 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4402 ccbh->status = CAM_REQUEUE_REQ; 4403 } 4404 return (sim->devq->send_queue.qfrozen_cnt); 4405} 4406 4407static void 4408xpt_release_devq_timeout(void *arg) 4409{ 4410 struct cam_ed *device; 4411 4412 device = (struct cam_ed *)arg; 4413 4414 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4415} 4416 4417void 4418xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4419{ 4420 xpt_release_devq_device(path->device, count, run_queue); 4421} 4422 4423static void 4424xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4425{ 4426 int rundevq; 4427 int s0, s1; 4428 4429 rundevq = 0; 4430 s0 = splsoftcam(); 4431 s1 = splcam(); 4432 if (dev->qfrozen_cnt > 0) { 4433 4434 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4435 dev->qfrozen_cnt -= count; 4436 if (dev->qfrozen_cnt == 0) { 4437 4438 /* 4439 * No longer need to wait for a successful 4440 * command completion. 4441 */ 4442 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4443 4444 /* 4445 * Remove any timeouts that might be scheduled 4446 * to release this queue. 4447 */ 4448 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4449 untimeout(xpt_release_devq_timeout, dev, 4450 dev->c_handle); 4451 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4452 } 4453 4454 /* 4455 * Now that we are unfrozen schedule the 4456 * device so any pending transactions are 4457 * run. 4458 */ 4459 if ((dev->ccbq.queue.entries > 0) 4460 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4461 && (run_queue != 0)) { 4462 rundevq = 1; 4463 } 4464 } 4465 } 4466 splx(s1); 4467 if (rundevq != 0) 4468 xpt_run_dev_sendq(dev->target->bus); 4469 splx(s0); 4470} 4471 4472void 4473xpt_release_simq(struct cam_sim *sim, int run_queue) 4474{ 4475 int s; 4476 struct camq *sendq; 4477 4478 sendq = &(sim->devq->send_queue); 4479 s = splcam(); 4480 if (sendq->qfrozen_cnt > 0) { 4481 4482 sendq->qfrozen_cnt--; 4483 if (sendq->qfrozen_cnt == 0) { 4484 struct cam_eb *bus; 4485 4486 /* 4487 * If there is a timeout scheduled to release this 4488 * sim queue, remove it. The queue frozen count is 4489 * already at 0. 4490 */ 4491 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4492 untimeout(xpt_release_simq_timeout, sim, 4493 sim->c_handle); 4494 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4495 } 4496 bus = xpt_find_bus(sim->path_id); 4497 splx(s); 4498 4499 if (run_queue) { 4500 /* 4501 * Now that we are unfrozen run the send queue. 4502 */ 4503 xpt_run_dev_sendq(bus); 4504 } 4505 xpt_release_bus(bus); 4506 } else 4507 splx(s); 4508 } else 4509 splx(s); 4510} 4511 4512static void 4513xpt_release_simq_timeout(void *arg) 4514{ 4515 struct cam_sim *sim; 4516 4517 sim = (struct cam_sim *)arg; 4518 xpt_release_simq(sim, /* run_queue */ TRUE); 4519} 4520 4521void 4522xpt_done(union ccb *done_ccb) 4523{ 4524 int s; 4525 4526 s = splcam(); 4527 4528 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4529 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4530 /* 4531 * Queue up the request for handling by our SWI handler 4532 * any of the "non-immediate" type of ccbs. 4533 */ 4534 switch (done_ccb->ccb_h.path->periph->type) { 4535 case CAM_PERIPH_BIO: 4536 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4537 sim_links.tqe); 4538 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4539 sched_swi(cambio_ih, SWI_NOSWITCH); 4540 break; 4541 case CAM_PERIPH_NET: 4542 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4543 sim_links.tqe); 4544 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4545 sched_swi(camnet_ih, SWI_NOSWITCH); 4546 break; 4547 } 4548 } 4549 splx(s); 4550} 4551 4552union ccb * 4553xpt_alloc_ccb() 4554{ 4555 union ccb *new_ccb; 4556 4557 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_WAITOK); 4558 return (new_ccb); 4559} 4560 4561void 4562xpt_free_ccb(union ccb *free_ccb) 4563{ 4564 free(free_ccb, M_DEVBUF); 4565} 4566 4567 4568 4569/* Private XPT functions */ 4570 4571/* 4572 * Get a CAM control block for the caller. Charge the structure to the device 4573 * referenced by the path. If the this device has no 'credits' then the 4574 * device already has the maximum number of outstanding operations under way 4575 * and we return NULL. If we don't have sufficient resources to allocate more 4576 * ccbs, we also return NULL. 4577 */ 4578static union ccb * 4579xpt_get_ccb(struct cam_ed *device) 4580{ 4581 union ccb *new_ccb; 4582 int s; 4583 4584 s = splsoftcam(); 4585 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) { 4586 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_NOWAIT); 4587 if (new_ccb == NULL) { 4588 splx(s); 4589 return (NULL); 4590 } 4591 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4592 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4593 xpt_links.sle); 4594 xpt_ccb_count++; 4595 } 4596 cam_ccbq_take_opening(&device->ccbq); 4597 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4598 splx(s); 4599 return (new_ccb); 4600} 4601 4602static void 4603xpt_release_bus(struct cam_eb *bus) 4604{ 4605 int s; 4606 4607 s = splcam(); 4608 if ((--bus->refcount == 0) 4609 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4610 TAILQ_REMOVE(&xpt_busses, bus, links); 4611 bus_generation++; 4612 splx(s); 4613 free(bus, M_DEVBUF); 4614 } else 4615 splx(s); 4616} 4617 4618static struct cam_et * 4619xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4620{ 4621 struct cam_et *target; 4622 4623 target = (struct cam_et *)malloc(sizeof(*target), M_DEVBUF, M_NOWAIT); 4624 if (target != NULL) { 4625 struct cam_et *cur_target; 4626 4627 TAILQ_INIT(&target->ed_entries); 4628 target->bus = bus; 4629 target->target_id = target_id; 4630 target->refcount = 1; 4631 target->generation = 0; 4632 timevalclear(&target->last_reset); 4633 /* 4634 * Hold a reference to our parent bus so it 4635 * will not go away before we do. 4636 */ 4637 bus->refcount++; 4638 4639 /* Insertion sort into our bus's target list */ 4640 cur_target = TAILQ_FIRST(&bus->et_entries); 4641 while (cur_target != NULL && cur_target->target_id < target_id) 4642 cur_target = TAILQ_NEXT(cur_target, links); 4643 4644 if (cur_target != NULL) { 4645 TAILQ_INSERT_BEFORE(cur_target, target, links); 4646 } else { 4647 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4648 } 4649 bus->generation++; 4650 } 4651 return (target); 4652} 4653 4654static void 4655xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4656{ 4657 int s; 4658 4659 s = splcam(); 4660 if ((--target->refcount == 0) 4661 && (TAILQ_FIRST(&target->ed_entries) == NULL)) { 4662 TAILQ_REMOVE(&bus->et_entries, target, links); 4663 bus->generation++; 4664 splx(s); 4665 free(target, M_DEVBUF); 4666 xpt_release_bus(bus); 4667 } else 4668 splx(s); 4669} 4670 4671static struct cam_ed * 4672xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4673{ 4674 struct cam_ed *device; 4675 struct cam_devq *devq; 4676 cam_status status; 4677 4678 /* Make space for us in the device queue on our bus */ 4679 devq = bus->sim->devq; 4680 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4681 4682 if (status != CAM_REQ_CMP) { 4683 device = NULL; 4684 } else { 4685 device = (struct cam_ed *)malloc(sizeof(*device), 4686 M_DEVBUF, M_NOWAIT); 4687 } 4688 4689 if (device != NULL) { 4690 struct cam_ed *cur_device; 4691 4692 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4693 device->alloc_ccb_entry.device = device; 4694 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4695 device->send_ccb_entry.device = device; 4696 device->target = target; 4697 device->lun_id = lun_id; 4698 /* Initialize our queues */ 4699 if (camq_init(&device->drvq, 0) != 0) { 4700 free(device, M_DEVBUF); 4701 return (NULL); 4702 } 4703 if (cam_ccbq_init(&device->ccbq, 4704 bus->sim->max_dev_openings) != 0) { 4705 camq_fini(&device->drvq); 4706 free(device, M_DEVBUF); 4707 return (NULL); 4708 } 4709 SLIST_INIT(&device->asyncs); 4710 SLIST_INIT(&device->periphs); 4711 device->generation = 0; 4712 device->owner = NULL; 4713 /* 4714 * Take the default quirk entry until we have inquiry 4715 * data and can determine a better quirk to use. 4716 */ 4717 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4718 bzero(&device->inq_data, sizeof(device->inq_data)); 4719 device->inq_flags = 0; 4720 device->queue_flags = 0; 4721 device->serial_num = NULL; 4722 device->serial_num_len = 0; 4723 device->qfrozen_cnt = 0; 4724 device->flags = CAM_DEV_UNCONFIGURED; 4725 device->tag_delay_count = 0; 4726 device->refcount = 1; 4727 callout_handle_init(&device->c_handle); 4728 4729 /* 4730 * Hold a reference to our parent target so it 4731 * will not go away before we do. 4732 */ 4733 target->refcount++; 4734 4735 /* 4736 * XXX should be limited by number of CCBs this bus can 4737 * do. 4738 */ 4739 xpt_max_ccbs += device->ccbq.devq_openings; 4740 /* Insertion sort into our target's device list */ 4741 cur_device = TAILQ_FIRST(&target->ed_entries); 4742 while (cur_device != NULL && cur_device->lun_id < lun_id) 4743 cur_device = TAILQ_NEXT(cur_device, links); 4744 if (cur_device != NULL) { 4745 TAILQ_INSERT_BEFORE(cur_device, device, links); 4746 } else { 4747 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4748 } 4749 target->generation++; 4750 } 4751 return (device); 4752} 4753 4754static void 4755xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4756 struct cam_ed *device) 4757{ 4758 int s; 4759 4760 s = splcam(); 4761 if ((--device->refcount == 0) 4762 && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) { 4763 struct cam_devq *devq; 4764 4765 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4766 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4767 panic("Removing device while still queued for ccbs"); 4768 4769 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4770 untimeout(xpt_release_devq_timeout, device, 4771 device->c_handle); 4772 4773 TAILQ_REMOVE(&target->ed_entries, device,links); 4774 target->generation++; 4775 xpt_max_ccbs -= device->ccbq.devq_openings; 4776 /* Release our slot in the devq */ 4777 devq = bus->sim->devq; 4778 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4779 splx(s); 4780 free(device, M_DEVBUF); 4781 xpt_release_target(bus, target); 4782 } else 4783 splx(s); 4784} 4785 4786static u_int32_t 4787xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4788{ 4789 int s; 4790 int diff; 4791 int result; 4792 struct cam_ed *dev; 4793 4794 dev = path->device; 4795 s = splsoftcam(); 4796 4797 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4798 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4799 if (result == CAM_REQ_CMP && (diff < 0)) { 4800 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4801 } 4802 /* Adjust the global limit */ 4803 xpt_max_ccbs += diff; 4804 splx(s); 4805 return (result); 4806} 4807 4808static struct cam_eb * 4809xpt_find_bus(path_id_t path_id) 4810{ 4811 struct cam_eb *bus; 4812 4813 for (bus = TAILQ_FIRST(&xpt_busses); 4814 bus != NULL; 4815 bus = TAILQ_NEXT(bus, links)) { 4816 if (bus->path_id == path_id) { 4817 bus->refcount++; 4818 break; 4819 } 4820 } 4821 return (bus); 4822} 4823 4824static struct cam_et * 4825xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4826{ 4827 struct cam_et *target; 4828 4829 for (target = TAILQ_FIRST(&bus->et_entries); 4830 target != NULL; 4831 target = TAILQ_NEXT(target, links)) { 4832 if (target->target_id == target_id) { 4833 target->refcount++; 4834 break; 4835 } 4836 } 4837 return (target); 4838} 4839 4840static struct cam_ed * 4841xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4842{ 4843 struct cam_ed *device; 4844 4845 for (device = TAILQ_FIRST(&target->ed_entries); 4846 device != NULL; 4847 device = TAILQ_NEXT(device, links)) { 4848 if (device->lun_id == lun_id) { 4849 device->refcount++; 4850 break; 4851 } 4852 } 4853 return (device); 4854} 4855 4856typedef struct { 4857 union ccb *request_ccb; 4858 struct ccb_pathinq *cpi; 4859 int pending_count; 4860} xpt_scan_bus_info; 4861 4862/* 4863 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4864 * As the scan progresses, xpt_scan_bus is used as the 4865 * callback on completion function. 4866 */ 4867static void 4868xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 4869{ 4870 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4871 ("xpt_scan_bus\n")); 4872 switch (request_ccb->ccb_h.func_code) { 4873 case XPT_SCAN_BUS: 4874 { 4875 xpt_scan_bus_info *scan_info; 4876 union ccb *work_ccb; 4877 struct cam_path *path; 4878 u_int i; 4879 u_int max_target; 4880 u_int initiator_id; 4881 4882 /* Find out the characteristics of the bus */ 4883 work_ccb = xpt_alloc_ccb(); 4884 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 4885 request_ccb->ccb_h.pinfo.priority); 4886 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4887 xpt_action(work_ccb); 4888 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4889 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 4890 xpt_free_ccb(work_ccb); 4891 xpt_done(request_ccb); 4892 return; 4893 } 4894 4895 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4896 /* 4897 * Can't scan the bus on an adapter that 4898 * cannot perform the initiator role. 4899 */ 4900 request_ccb->ccb_h.status = CAM_REQ_CMP; 4901 xpt_free_ccb(work_ccb); 4902 xpt_done(request_ccb); 4903 return; 4904 } 4905 4906 /* Save some state for use while we probe for devices */ 4907 scan_info = (xpt_scan_bus_info *) 4908 malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_WAITOK); 4909 scan_info->request_ccb = request_ccb; 4910 scan_info->cpi = &work_ccb->cpi; 4911 4912 /* Cache on our stack so we can work asynchronously */ 4913 max_target = scan_info->cpi->max_target; 4914 initiator_id = scan_info->cpi->initiator_id; 4915 4916 /* 4917 * Don't count the initiator if the 4918 * initiator is addressable. 4919 */ 4920 scan_info->pending_count = max_target + 1; 4921 if (initiator_id <= max_target) 4922 scan_info->pending_count--; 4923 4924 for (i = 0; i <= max_target; i++) { 4925 cam_status status; 4926 if (i == initiator_id) 4927 continue; 4928 4929 status = xpt_create_path(&path, xpt_periph, 4930 request_ccb->ccb_h.path_id, 4931 i, 0); 4932 if (status != CAM_REQ_CMP) { 4933 printf("xpt_scan_bus: xpt_create_path failed" 4934 " with status %#x, bus scan halted\n", 4935 status); 4936 break; 4937 } 4938 work_ccb = xpt_alloc_ccb(); 4939 xpt_setup_ccb(&work_ccb->ccb_h, path, 4940 request_ccb->ccb_h.pinfo.priority); 4941 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4942 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4943 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 4944 work_ccb->crcn.flags = request_ccb->crcn.flags; 4945#if 0 4946 printf("xpt_scan_bus: probing %d:%d:%d\n", 4947 request_ccb->ccb_h.path_id, i, 0); 4948#endif 4949 xpt_action(work_ccb); 4950 } 4951 break; 4952 } 4953 case XPT_SCAN_LUN: 4954 { 4955 xpt_scan_bus_info *scan_info; 4956 path_id_t path_id; 4957 target_id_t target_id; 4958 lun_id_t lun_id; 4959 4960 /* Reuse the same CCB to query if a device was really found */ 4961 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 4962 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 4963 request_ccb->ccb_h.pinfo.priority); 4964 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 4965 4966 path_id = request_ccb->ccb_h.path_id; 4967 target_id = request_ccb->ccb_h.target_id; 4968 lun_id = request_ccb->ccb_h.target_lun; 4969 xpt_action(request_ccb); 4970 4971#if 0 4972 printf("xpt_scan_bus: got back probe from %d:%d:%d\n", 4973 path_id, target_id, lun_id); 4974#endif 4975 4976 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 4977 struct cam_ed *device; 4978 struct cam_et *target; 4979 int s, phl; 4980 4981 /* 4982 * If we already probed lun 0 successfully, or 4983 * we have additional configured luns on this 4984 * target that might have "gone away", go onto 4985 * the next lun. 4986 */ 4987 target = request_ccb->ccb_h.path->target; 4988 /* 4989 * We may touch devices that we don't 4990 * hold references too, so ensure they 4991 * don't disappear out from under us. 4992 * The target above is referenced by the 4993 * path in the request ccb. 4994 */ 4995 phl = 0; 4996 s = splcam(); 4997 device = TAILQ_FIRST(&target->ed_entries); 4998 if (device != NULL) { 4999 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 5000 if (device->lun_id == 0) 5001 device = TAILQ_NEXT(device, links); 5002 } 5003 splx(s); 5004 if ((lun_id != 0) || (device != NULL)) { 5005 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5006 lun_id++; 5007 } 5008 } else { 5009 struct cam_ed *device; 5010 5011 device = request_ccb->ccb_h.path->device; 5012 5013 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5014 /* Try the next lun */ 5015 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 5016 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 5017 lun_id++; 5018 } 5019 } 5020 5021 xpt_free_path(request_ccb->ccb_h.path); 5022 5023 /* Check Bounds */ 5024 if ((lun_id == request_ccb->ccb_h.target_lun) 5025 || lun_id > scan_info->cpi->max_lun) { 5026 /* We're done */ 5027 5028 xpt_free_ccb(request_ccb); 5029 scan_info->pending_count--; 5030 if (scan_info->pending_count == 0) { 5031 xpt_free_ccb((union ccb *)scan_info->cpi); 5032 request_ccb = scan_info->request_ccb; 5033 free(scan_info, M_TEMP); 5034 request_ccb->ccb_h.status = CAM_REQ_CMP; 5035 xpt_done(request_ccb); 5036 } 5037 } else { 5038 /* Try the next device */ 5039 struct cam_path *path; 5040 cam_status status; 5041 5042 path = request_ccb->ccb_h.path; 5043 status = xpt_create_path(&path, xpt_periph, 5044 path_id, target_id, lun_id); 5045 if (status != CAM_REQ_CMP) { 5046 printf("xpt_scan_bus: xpt_create_path failed " 5047 "with status %#x, halting LUN scan\n", 5048 status); 5049 xpt_free_ccb(request_ccb); 5050 scan_info->pending_count--; 5051 if (scan_info->pending_count == 0) { 5052 xpt_free_ccb( 5053 (union ccb *)scan_info->cpi); 5054 request_ccb = scan_info->request_ccb; 5055 free(scan_info, M_TEMP); 5056 request_ccb->ccb_h.status = CAM_REQ_CMP; 5057 xpt_done(request_ccb); 5058 break; 5059 } 5060 } 5061 xpt_setup_ccb(&request_ccb->ccb_h, path, 5062 request_ccb->ccb_h.pinfo.priority); 5063 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5064 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5065 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5066 request_ccb->crcn.flags = 5067 scan_info->request_ccb->crcn.flags; 5068#if 0 5069 xpt_print_path(path); 5070 printf("xpt_scan bus probing\n"); 5071#endif 5072 xpt_action(request_ccb); 5073 } 5074 break; 5075 } 5076 default: 5077 break; 5078 } 5079} 5080 5081typedef enum { 5082 PROBE_TUR, 5083 PROBE_INQUIRY, 5084 PROBE_FULL_INQUIRY, 5085 PROBE_MODE_SENSE, 5086 PROBE_SERIAL_NUM, 5087 PROBE_TUR_FOR_NEGOTIATION 5088} probe_action; 5089 5090typedef enum { 5091 PROBE_INQUIRY_CKSUM = 0x01, 5092 PROBE_SERIAL_CKSUM = 0x02, 5093 PROBE_NO_ANNOUNCE = 0x04 5094} probe_flags; 5095 5096typedef struct { 5097 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5098 probe_action action; 5099 union ccb saved_ccb; 5100 probe_flags flags; 5101 MD5_CTX context; 5102 u_int8_t digest[16]; 5103} probe_softc; 5104 5105static void 5106xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5107 cam_flags flags, union ccb *request_ccb) 5108{ 5109 struct ccb_pathinq cpi; 5110 cam_status status; 5111 struct cam_path *new_path; 5112 struct cam_periph *old_periph; 5113 int s; 5114 5115 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5116 ("xpt_scan_lun\n")); 5117 5118 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5119 cpi.ccb_h.func_code = XPT_PATH_INQ; 5120 xpt_action((union ccb *)&cpi); 5121 5122 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5123 if (request_ccb != NULL) { 5124 request_ccb->ccb_h.status = cpi.ccb_h.status; 5125 xpt_done(request_ccb); 5126 } 5127 return; 5128 } 5129 5130 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5131 /* 5132 * Can't scan the bus on an adapter that 5133 * cannot perform the initiator role. 5134 */ 5135 if (request_ccb != NULL) { 5136 request_ccb->ccb_h.status = CAM_REQ_CMP; 5137 xpt_done(request_ccb); 5138 } 5139 return; 5140 } 5141 5142 if (request_ccb == NULL) { 5143 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_NOWAIT); 5144 if (request_ccb == NULL) { 5145 xpt_print_path(path); 5146 printf("xpt_scan_lun: can't allocate CCB, can't " 5147 "continue\n"); 5148 return; 5149 } 5150 new_path = malloc(sizeof(*new_path), M_TEMP, M_NOWAIT); 5151 if (new_path == NULL) { 5152 xpt_print_path(path); 5153 printf("xpt_scan_lun: can't allocate path, can't " 5154 "continue\n"); 5155 free(request_ccb, M_TEMP); 5156 return; 5157 } 5158 status = xpt_compile_path(new_path, xpt_periph, 5159 path->bus->path_id, 5160 path->target->target_id, 5161 path->device->lun_id); 5162 5163 if (status != CAM_REQ_CMP) { 5164 xpt_print_path(path); 5165 printf("xpt_scan_lun: can't compile path, can't " 5166 "continue\n"); 5167 free(request_ccb, M_TEMP); 5168 free(new_path, M_TEMP); 5169 return; 5170 } 5171 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5172 request_ccb->ccb_h.cbfcnp = xptscandone; 5173 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5174 request_ccb->crcn.flags = flags; 5175 } 5176 5177 s = splsoftcam(); 5178 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5179 probe_softc *softc; 5180 5181 softc = (probe_softc *)old_periph->softc; 5182 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5183 periph_links.tqe); 5184 } else { 5185 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5186 probestart, "probe", 5187 CAM_PERIPH_BIO, 5188 request_ccb->ccb_h.path, NULL, 0, 5189 request_ccb); 5190 5191 if (status != CAM_REQ_CMP) { 5192 xpt_print_path(path); 5193 printf("xpt_scan_lun: cam_alloc_periph returned an " 5194 "error, can't continue probe\n"); 5195 request_ccb->ccb_h.status = status; 5196 xpt_done(request_ccb); 5197 } 5198 } 5199 splx(s); 5200} 5201 5202static void 5203xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5204{ 5205 xpt_release_path(done_ccb->ccb_h.path); 5206 free(done_ccb->ccb_h.path, M_TEMP); 5207 free(done_ccb, M_TEMP); 5208} 5209 5210static cam_status 5211proberegister(struct cam_periph *periph, void *arg) 5212{ 5213 union ccb *request_ccb; /* CCB representing the probe request */ 5214 probe_softc *softc; 5215 5216 request_ccb = (union ccb *)arg; 5217 if (periph == NULL) { 5218 printf("proberegister: periph was NULL!!\n"); 5219 return(CAM_REQ_CMP_ERR); 5220 } 5221 5222 if (request_ccb == NULL) { 5223 printf("proberegister: no probe CCB, " 5224 "can't register device\n"); 5225 return(CAM_REQ_CMP_ERR); 5226 } 5227 5228 softc = (probe_softc *)malloc(sizeof(*softc), M_TEMP, M_NOWAIT); 5229 5230 if (softc == NULL) { 5231 printf("proberegister: Unable to probe new device. " 5232 "Unable to allocate softc\n"); 5233 return(CAM_REQ_CMP_ERR); 5234 } 5235 TAILQ_INIT(&softc->request_ccbs); 5236 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5237 periph_links.tqe); 5238 softc->flags = 0; 5239 periph->softc = softc; 5240 cam_periph_acquire(periph); 5241 /* 5242 * Ensure we've waited at least a bus settle 5243 * delay before attempting to probe the device. 5244 * For HBAs that don't do bus resets, this won't make a difference. 5245 */ 5246 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5247 SCSI_DELAY); 5248 probeschedule(periph); 5249 return(CAM_REQ_CMP); 5250} 5251 5252static void 5253probeschedule(struct cam_periph *periph) 5254{ 5255 struct ccb_pathinq cpi; 5256 union ccb *ccb; 5257 probe_softc *softc; 5258 5259 softc = (probe_softc *)periph->softc; 5260 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5261 5262 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5263 cpi.ccb_h.func_code = XPT_PATH_INQ; 5264 xpt_action((union ccb *)&cpi); 5265 5266 /* 5267 * If a device has gone away and another device, or the same one, 5268 * is back in the same place, it should have a unit attention 5269 * condition pending. It will not report the unit attention in 5270 * response to an inquiry, which may leave invalid transfer 5271 * negotiations in effect. The TUR will reveal the unit attention 5272 * condition. Only send the TUR for lun 0, since some devices 5273 * will get confused by commands other than inquiry to non-existent 5274 * luns. If you think a device has gone away start your scan from 5275 * lun 0. This will insure that any bogus transfer settings are 5276 * invalidated. 5277 * 5278 * If we haven't seen the device before and the controller supports 5279 * some kind of transfer negotiation, negotiate with the first 5280 * sent command if no bus reset was performed at startup. This 5281 * ensures that the device is not confused by transfer negotiation 5282 * settings left over by loader or BIOS action. 5283 */ 5284 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5285 && (ccb->ccb_h.target_lun == 0)) { 5286 softc->action = PROBE_TUR; 5287 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5288 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5289 proberequestdefaultnegotiation(periph); 5290 softc->action = PROBE_INQUIRY; 5291 } else { 5292 softc->action = PROBE_INQUIRY; 5293 } 5294 5295 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5296 softc->flags |= PROBE_NO_ANNOUNCE; 5297 else 5298 softc->flags &= ~PROBE_NO_ANNOUNCE; 5299 5300 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5301} 5302 5303static void 5304probestart(struct cam_periph *periph, union ccb *start_ccb) 5305{ 5306 /* Probe the device that our peripheral driver points to */ 5307 struct ccb_scsiio *csio; 5308 probe_softc *softc; 5309 5310 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5311 5312 softc = (probe_softc *)periph->softc; 5313 csio = &start_ccb->csio; 5314 5315 switch (softc->action) { 5316 case PROBE_TUR: 5317 case PROBE_TUR_FOR_NEGOTIATION: 5318 { 5319 scsi_test_unit_ready(csio, 5320 /*retries*/4, 5321 probedone, 5322 MSG_SIMPLE_Q_TAG, 5323 SSD_FULL_SIZE, 5324 /*timeout*/60000); 5325 break; 5326 } 5327 case PROBE_INQUIRY: 5328 case PROBE_FULL_INQUIRY: 5329 { 5330 u_int inquiry_len; 5331 struct scsi_inquiry_data *inq_buf; 5332 5333 inq_buf = &periph->path->device->inq_data; 5334 /* 5335 * If the device is currently configured, we calculate an 5336 * MD5 checksum of the inquiry data, and if the serial number 5337 * length is greater than 0, add the serial number data 5338 * into the checksum as well. Once the inquiry and the 5339 * serial number check finish, we attempt to figure out 5340 * whether we still have the same device. 5341 */ 5342 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5343 5344 MD5Init(&softc->context); 5345 MD5Update(&softc->context, (unsigned char *)inq_buf, 5346 sizeof(struct scsi_inquiry_data)); 5347 softc->flags |= PROBE_INQUIRY_CKSUM; 5348 if (periph->path->device->serial_num_len > 0) { 5349 MD5Update(&softc->context, 5350 periph->path->device->serial_num, 5351 periph->path->device->serial_num_len); 5352 softc->flags |= PROBE_SERIAL_CKSUM; 5353 } 5354 MD5Final(softc->digest, &softc->context); 5355 } 5356 5357 if (softc->action == PROBE_INQUIRY) 5358 inquiry_len = SHORT_INQUIRY_LENGTH; 5359 else 5360 inquiry_len = inq_buf->additional_length + 4; 5361 5362 scsi_inquiry(csio, 5363 /*retries*/4, 5364 probedone, 5365 MSG_SIMPLE_Q_TAG, 5366 (u_int8_t *)inq_buf, 5367 inquiry_len, 5368 /*evpd*/FALSE, 5369 /*page_code*/0, 5370 SSD_MIN_SIZE, 5371 /*timeout*/60 * 1000); 5372 break; 5373 } 5374 case PROBE_MODE_SENSE: 5375 { 5376 void *mode_buf; 5377 int mode_buf_len; 5378 5379 mode_buf_len = sizeof(struct scsi_mode_header_6) 5380 + sizeof(struct scsi_mode_blk_desc) 5381 + sizeof(struct scsi_control_page); 5382 mode_buf = malloc(mode_buf_len, M_TEMP, M_NOWAIT); 5383 if (mode_buf != NULL) { 5384 scsi_mode_sense(csio, 5385 /*retries*/4, 5386 probedone, 5387 MSG_SIMPLE_Q_TAG, 5388 /*dbd*/FALSE, 5389 SMS_PAGE_CTRL_CURRENT, 5390 SMS_CONTROL_MODE_PAGE, 5391 mode_buf, 5392 mode_buf_len, 5393 SSD_FULL_SIZE, 5394 /*timeout*/60000); 5395 break; 5396 } 5397 xpt_print_path(periph->path); 5398 printf("Unable to mode sense control page - malloc failure\n"); 5399 softc->action = PROBE_SERIAL_NUM; 5400 /* FALLTHROUGH */ 5401 } 5402 case PROBE_SERIAL_NUM: 5403 { 5404 struct scsi_vpd_unit_serial_number *serial_buf; 5405 struct cam_ed* device; 5406 5407 serial_buf = NULL; 5408 device = periph->path->device; 5409 device->serial_num = NULL; 5410 device->serial_num_len = 0; 5411 5412 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) 5413 serial_buf = (struct scsi_vpd_unit_serial_number *) 5414 malloc(sizeof(*serial_buf), M_TEMP, 5415 M_NOWAIT | M_ZERO); 5416 5417 if (serial_buf != NULL) { 5418 scsi_inquiry(csio, 5419 /*retries*/4, 5420 probedone, 5421 MSG_SIMPLE_Q_TAG, 5422 (u_int8_t *)serial_buf, 5423 sizeof(*serial_buf), 5424 /*evpd*/TRUE, 5425 SVPD_UNIT_SERIAL_NUMBER, 5426 SSD_MIN_SIZE, 5427 /*timeout*/60 * 1000); 5428 break; 5429 } 5430 /* 5431 * We'll have to do without, let our probedone 5432 * routine finish up for us. 5433 */ 5434 start_ccb->csio.data_ptr = NULL; 5435 probedone(periph, start_ccb); 5436 return; 5437 } 5438 } 5439 xpt_action(start_ccb); 5440} 5441 5442static void 5443proberequestdefaultnegotiation(struct cam_periph *periph) 5444{ 5445 struct ccb_trans_settings cts; 5446 5447 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5448 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5449 cts.flags = CCB_TRANS_USER_SETTINGS; 5450 xpt_action((union ccb *)&cts); 5451 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5452 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5453 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5454 xpt_action((union ccb *)&cts); 5455} 5456 5457static void 5458probedone(struct cam_periph *periph, union ccb *done_ccb) 5459{ 5460 probe_softc *softc; 5461 struct cam_path *path; 5462 u_int32_t priority; 5463 5464 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5465 5466 softc = (probe_softc *)periph->softc; 5467 path = done_ccb->ccb_h.path; 5468 priority = done_ccb->ccb_h.pinfo.priority; 5469 5470 switch (softc->action) { 5471 case PROBE_TUR: 5472 { 5473 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5474 5475 if (cam_periph_error(done_ccb, 0, 5476 SF_NO_PRINT, NULL) == ERESTART) 5477 return; 5478 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5479 /* Don't wedge the queue */ 5480 xpt_release_devq(done_ccb->ccb_h.path, 5481 /*count*/1, 5482 /*run_queue*/TRUE); 5483 } 5484 softc->action = PROBE_INQUIRY; 5485 xpt_release_ccb(done_ccb); 5486 xpt_schedule(periph, priority); 5487 return; 5488 } 5489 case PROBE_INQUIRY: 5490 case PROBE_FULL_INQUIRY: 5491 { 5492 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5493 struct scsi_inquiry_data *inq_buf; 5494 u_int8_t periph_qual; 5495 u_int8_t periph_dtype; 5496 5497 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5498 inq_buf = &path->device->inq_data; 5499 5500 periph_qual = SID_QUAL(inq_buf); 5501 periph_dtype = SID_TYPE(inq_buf); 5502 5503 if (periph_dtype != T_NODEVICE) { 5504 switch(periph_qual) { 5505 case SID_QUAL_LU_CONNECTED: 5506 { 5507 u_int8_t alen; 5508 5509 /* 5510 * We conservatively request only 5511 * SHORT_INQUIRY_LEN bytes of inquiry 5512 * information during our first try 5513 * at sending an INQUIRY. If the device 5514 * has more information to give, 5515 * perform a second request specifying 5516 * the amount of information the device 5517 * is willing to give. 5518 */ 5519 alen = inq_buf->additional_length; 5520 if (softc->action == PROBE_INQUIRY 5521 && alen > (SHORT_INQUIRY_LENGTH - 4)) { 5522 softc->action = 5523 PROBE_FULL_INQUIRY; 5524 xpt_release_ccb(done_ccb); 5525 xpt_schedule(periph, priority); 5526 return; 5527 } 5528 5529 xpt_find_quirk(path->device); 5530 5531 if ((inq_buf->flags & SID_CmdQue) != 0) 5532 softc->action = 5533 PROBE_MODE_SENSE; 5534 else 5535 softc->action = 5536 PROBE_SERIAL_NUM; 5537 5538 path->device->flags &= 5539 ~CAM_DEV_UNCONFIGURED; 5540 5541 xpt_release_ccb(done_ccb); 5542 xpt_schedule(periph, priority); 5543 return; 5544 } 5545 default: 5546 break; 5547 } 5548 } 5549 } else if (cam_periph_error(done_ccb, 0, 5550 done_ccb->ccb_h.target_lun > 0 5551 ? SF_RETRY_UA|SF_QUIET_IR 5552 : SF_RETRY_UA, 5553 &softc->saved_ccb) == ERESTART) { 5554 return; 5555 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5556 /* Don't wedge the queue */ 5557 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5558 /*run_queue*/TRUE); 5559 } 5560 /* 5561 * If we get to this point, we got an error status back 5562 * from the inquiry and the error status doesn't require 5563 * automatically retrying the command. Therefore, the 5564 * inquiry failed. If we had inquiry information before 5565 * for this device, but this latest inquiry command failed, 5566 * the device has probably gone away. If this device isn't 5567 * already marked unconfigured, notify the peripheral 5568 * drivers that this device is no more. 5569 */ 5570 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5571 /* Send the async notification. */ 5572 xpt_async(AC_LOST_DEVICE, path, NULL); 5573 5574 xpt_release_ccb(done_ccb); 5575 break; 5576 } 5577 case PROBE_MODE_SENSE: 5578 { 5579 struct ccb_scsiio *csio; 5580 struct scsi_mode_header_6 *mode_hdr; 5581 5582 csio = &done_ccb->csio; 5583 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5584 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5585 struct scsi_control_page *page; 5586 u_int8_t *offset; 5587 5588 offset = ((u_int8_t *)&mode_hdr[1]) 5589 + mode_hdr->blk_desc_len; 5590 page = (struct scsi_control_page *)offset; 5591 path->device->queue_flags = page->queue_flags; 5592 } else if (cam_periph_error(done_ccb, 0, 5593 SF_RETRY_UA|SF_NO_PRINT, 5594 &softc->saved_ccb) == ERESTART) { 5595 return; 5596 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5597 /* Don't wedge the queue */ 5598 xpt_release_devq(done_ccb->ccb_h.path, 5599 /*count*/1, /*run_queue*/TRUE); 5600 } 5601 xpt_release_ccb(done_ccb); 5602 free(mode_hdr, M_TEMP); 5603 softc->action = PROBE_SERIAL_NUM; 5604 xpt_schedule(periph, priority); 5605 return; 5606 } 5607 case PROBE_SERIAL_NUM: 5608 { 5609 struct ccb_scsiio *csio; 5610 struct scsi_vpd_unit_serial_number *serial_buf; 5611 u_int32_t priority; 5612 int changed; 5613 int have_serialnum; 5614 5615 changed = 1; 5616 have_serialnum = 0; 5617 csio = &done_ccb->csio; 5618 priority = done_ccb->ccb_h.pinfo.priority; 5619 serial_buf = 5620 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5621 5622 /* Clean up from previous instance of this device */ 5623 if (path->device->serial_num != NULL) { 5624 free(path->device->serial_num, M_DEVBUF); 5625 path->device->serial_num = NULL; 5626 path->device->serial_num_len = 0; 5627 } 5628 5629 if (serial_buf == NULL) { 5630 /* 5631 * Don't process the command as it was never sent 5632 */ 5633 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5634 && (serial_buf->length > 0)) { 5635 5636 have_serialnum = 1; 5637 path->device->serial_num = 5638 (u_int8_t *)malloc((serial_buf->length + 1), 5639 M_DEVBUF, M_NOWAIT); 5640 if (path->device->serial_num != NULL) { 5641 bcopy(serial_buf->serial_num, 5642 path->device->serial_num, 5643 serial_buf->length); 5644 path->device->serial_num_len = 5645 serial_buf->length; 5646 path->device->serial_num[serial_buf->length] 5647 = '\0'; 5648 } 5649 } else if (cam_periph_error(done_ccb, 0, 5650 SF_RETRY_UA|SF_NO_PRINT, 5651 &softc->saved_ccb) == ERESTART) { 5652 return; 5653 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5654 /* Don't wedge the queue */ 5655 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5656 /*run_queue*/TRUE); 5657 } 5658 5659 /* 5660 * Let's see if we have seen this device before. 5661 */ 5662 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5663 MD5_CTX context; 5664 u_int8_t digest[16]; 5665 5666 MD5Init(&context); 5667 5668 MD5Update(&context, 5669 (unsigned char *)&path->device->inq_data, 5670 sizeof(struct scsi_inquiry_data)); 5671 5672 if (have_serialnum) 5673 MD5Update(&context, serial_buf->serial_num, 5674 serial_buf->length); 5675 5676 MD5Final(digest, &context); 5677 if (bcmp(softc->digest, digest, 16) == 0) 5678 changed = 0; 5679 5680 /* 5681 * XXX Do we need to do a TUR in order to ensure 5682 * that the device really hasn't changed??? 5683 */ 5684 if ((changed != 0) 5685 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5686 xpt_async(AC_LOST_DEVICE, path, NULL); 5687 } 5688 if (serial_buf != NULL) 5689 free(serial_buf, M_TEMP); 5690 5691 if (changed != 0) { 5692 /* 5693 * Now that we have all the necessary 5694 * information to safely perform transfer 5695 * negotiations... Controllers don't perform 5696 * any negotiation or tagged queuing until 5697 * after the first XPT_SET_TRAN_SETTINGS ccb is 5698 * received. So, on a new device, just retreive 5699 * the user settings, and set them as the current 5700 * settings to set the device up. 5701 */ 5702 proberequestdefaultnegotiation(periph); 5703 xpt_release_ccb(done_ccb); 5704 5705 /* 5706 * Perform a TUR to allow the controller to 5707 * perform any necessary transfer negotiation. 5708 */ 5709 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5710 xpt_schedule(periph, priority); 5711 return; 5712 } 5713 xpt_release_ccb(done_ccb); 5714 break; 5715 } 5716 case PROBE_TUR_FOR_NEGOTIATION: 5717 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5718 /* Don't wedge the queue */ 5719 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5720 /*run_queue*/TRUE); 5721 } 5722 5723 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5724 5725 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5726 /* Inform the XPT that a new device has been found */ 5727 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5728 xpt_action(done_ccb); 5729 5730 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5731 } 5732 xpt_release_ccb(done_ccb); 5733 break; 5734 } 5735 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5736 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5737 done_ccb->ccb_h.status = CAM_REQ_CMP; 5738 xpt_done(done_ccb); 5739 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5740 cam_periph_invalidate(periph); 5741 cam_periph_release(periph); 5742 } else { 5743 probeschedule(periph); 5744 } 5745} 5746 5747static void 5748probecleanup(struct cam_periph *periph) 5749{ 5750 free(periph->softc, M_TEMP); 5751} 5752 5753static void 5754xpt_find_quirk(struct cam_ed *device) 5755{ 5756 caddr_t match; 5757 5758 match = cam_quirkmatch((caddr_t)&device->inq_data, 5759 (caddr_t)xpt_quirk_table, 5760 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5761 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5762 5763 if (match == NULL) 5764 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5765 5766 device->quirk = (struct xpt_quirk_entry *)match; 5767} 5768 5769static void 5770xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5771 int async_update) 5772{ 5773 struct cam_sim *sim; 5774 int qfrozen; 5775 5776 sim = cts->ccb_h.path->bus->sim; 5777 if (async_update == FALSE) { 5778 struct scsi_inquiry_data *inq_data; 5779 struct ccb_pathinq cpi; 5780 struct ccb_trans_settings cur_cts; 5781 5782 if (device == NULL) { 5783 cts->ccb_h.status = CAM_PATH_INVALID; 5784 xpt_done((union ccb *)cts); 5785 return; 5786 } 5787 5788 /* 5789 * Perform sanity checking against what the 5790 * controller and device can do. 5791 */ 5792 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 5793 cpi.ccb_h.func_code = XPT_PATH_INQ; 5794 xpt_action((union ccb *)&cpi); 5795 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 5796 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5797 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 5798 xpt_action((union ccb *)&cur_cts); 5799 inq_data = &device->inq_data; 5800 5801 /* Fill in any gaps in what the user gave us */ 5802 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 5803 cts->sync_period = cur_cts.sync_period; 5804 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 5805 cts->sync_offset = cur_cts.sync_offset; 5806 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 5807 cts->bus_width = cur_cts.bus_width; 5808 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 5809 cts->flags &= ~CCB_TRANS_DISC_ENB; 5810 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 5811 } 5812 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 5813 cts->flags &= ~CCB_TRANS_TAG_ENB; 5814 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 5815 } 5816 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 5817 && (inq_data->flags & SID_Sync) == 0) 5818 || (cpi.hba_inquiry & PI_SDTR_ABLE) == 0) { 5819 /* Force async */ 5820 cts->sync_period = 0; 5821 cts->sync_offset = 0; 5822 } 5823 5824 /* 5825 * Don't allow DT transmission rates if the 5826 * device does not support it. 5827 */ 5828 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 5829 && (inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 5830 && cts->sync_period <= 0x9) 5831 cts->sync_period = 0xa; 5832 5833 switch (cts->bus_width) { 5834 case MSG_EXT_WDTR_BUS_32_BIT: 5835 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5836 || (inq_data->flags & SID_WBus32) != 0) 5837 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 5838 break; 5839 /* Fall Through to 16-bit */ 5840 case MSG_EXT_WDTR_BUS_16_BIT: 5841 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5842 || (inq_data->flags & SID_WBus16) != 0) 5843 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 5844 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 5845 break; 5846 } 5847 /* Fall Through to 8-bit */ 5848 default: /* New bus width?? */ 5849 case MSG_EXT_WDTR_BUS_8_BIT: 5850 /* All targets can do this */ 5851 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 5852 break; 5853 } 5854 5855 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 5856 /* 5857 * Can't tag queue without disconnection. 5858 */ 5859 cts->flags &= ~CCB_TRANS_TAG_ENB; 5860 cts->valid |= CCB_TRANS_TQ_VALID; 5861 } 5862 5863 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 5864 || (inq_data->flags & SID_CmdQue) == 0 5865 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 5866 || (device->quirk->mintags == 0)) { 5867 /* 5868 * Can't tag on hardware that doesn't support, 5869 * doesn't have it enabled, or has broken tag support. 5870 */ 5871 cts->flags &= ~CCB_TRANS_TAG_ENB; 5872 } 5873 } 5874 5875 qfrozen = FALSE; 5876 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 5877 5878 /* 5879 * If we are transitioning from tags to no-tags or 5880 * vice-versa, we need to carefully freeze and restart 5881 * the queue so that we don't overlap tagged and non-tagged 5882 * commands. We also temporarily stop tags if there is 5883 * a change in transfer negotiation settings to allow 5884 * "tag-less" negotiation. 5885 */ 5886 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5887 || (device->inq_flags & SID_CmdQue) != 0) 5888 device_tagenb = TRUE; 5889 else 5890 device_tagenb = FALSE; 5891 5892 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 5893 && device_tagenb == FALSE) 5894 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 5895 && device_tagenb == TRUE)) { 5896 5897 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 5898 /* 5899 * Delay change to use tags until after a 5900 * few commands have gone to this device so 5901 * the controller has time to perform transfer 5902 * negotiations without tagged messages getting 5903 * in the way. 5904 */ 5905 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 5906 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 5907 } else { 5908 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 5909 qfrozen = TRUE; 5910 device->inq_flags &= ~SID_CmdQue; 5911 xpt_dev_ccbq_resize(cts->ccb_h.path, 5912 sim->max_dev_openings); 5913 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5914 device->tag_delay_count = 0; 5915 } 5916 } 5917 } 5918 5919 if (async_update == FALSE) { 5920 /* 5921 * If we are currently performing tagged transactions to 5922 * this device and want to change its negotiation parameters, 5923 * go non-tagged for a bit to give the controller a chance to 5924 * negotiate unhampered by tag messages. 5925 */ 5926 if ((device->inq_flags & SID_CmdQue) != 0 5927 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 5928 CCB_TRANS_SYNC_OFFSET_VALID| 5929 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 5930 xpt_toggle_tags(cts->ccb_h.path); 5931 5932 (*(sim->sim_action))(sim, (union ccb *)cts); 5933 } 5934 5935 if (qfrozen) { 5936 struct ccb_relsim crs; 5937 5938 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 5939 /*priority*/1); 5940 crs.ccb_h.func_code = XPT_REL_SIMQ; 5941 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5942 crs.openings 5943 = crs.release_timeout 5944 = crs.qfrozen_cnt 5945 = 0; 5946 xpt_action((union ccb *)&crs); 5947 } 5948} 5949 5950static void 5951xpt_toggle_tags(struct cam_path *path) 5952{ 5953 struct cam_ed *dev; 5954 5955 /* 5956 * Give controllers a chance to renegotiate 5957 * before starting tag operations. We 5958 * "toggle" tagged queuing off then on 5959 * which causes the tag enable command delay 5960 * counter to come into effect. 5961 */ 5962 dev = path->device; 5963 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5964 || ((dev->inq_flags & SID_CmdQue) != 0 5965 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 5966 struct ccb_trans_settings cts; 5967 5968 xpt_setup_ccb(&cts.ccb_h, path, 1); 5969 cts.flags = 0; 5970 cts.valid = CCB_TRANS_TQ_VALID; 5971 xpt_set_transfer_settings(&cts, path->device, 5972 /*async_update*/TRUE); 5973 cts.flags = CCB_TRANS_TAG_ENB; 5974 xpt_set_transfer_settings(&cts, path->device, 5975 /*async_update*/TRUE); 5976 } 5977} 5978 5979static void 5980xpt_start_tags(struct cam_path *path) 5981{ 5982 struct ccb_relsim crs; 5983 struct cam_ed *device; 5984 struct cam_sim *sim; 5985 int newopenings; 5986 5987 device = path->device; 5988 sim = path->bus->sim; 5989 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5990 xpt_freeze_devq(path, /*count*/1); 5991 device->inq_flags |= SID_CmdQue; 5992 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 5993 xpt_dev_ccbq_resize(path, newopenings); 5994 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 5995 crs.ccb_h.func_code = XPT_REL_SIMQ; 5996 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5997 crs.openings 5998 = crs.release_timeout 5999 = crs.qfrozen_cnt 6000 = 0; 6001 xpt_action((union ccb *)&crs); 6002} 6003 6004static int busses_to_config; 6005static int busses_to_reset; 6006 6007static int 6008xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6009{ 6010 if (bus->path_id != CAM_XPT_PATH_ID) { 6011 struct cam_path path; 6012 struct ccb_pathinq cpi; 6013 int can_negotiate; 6014 6015 busses_to_config++; 6016 xpt_compile_path(&path, NULL, bus->path_id, 6017 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6018 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6019 cpi.ccb_h.func_code = XPT_PATH_INQ; 6020 xpt_action((union ccb *)&cpi); 6021 can_negotiate = cpi.hba_inquiry; 6022 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6023 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6024 && can_negotiate) 6025 busses_to_reset++; 6026 xpt_release_path(&path); 6027 } 6028 6029 return(1); 6030} 6031 6032static int 6033xptconfigfunc(struct cam_eb *bus, void *arg) 6034{ 6035 struct cam_path *path; 6036 union ccb *work_ccb; 6037 6038 if (bus->path_id != CAM_XPT_PATH_ID) { 6039 cam_status status; 6040 int can_negotiate; 6041 6042 work_ccb = xpt_alloc_ccb(); 6043 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6044 CAM_TARGET_WILDCARD, 6045 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6046 printf("xptconfigfunc: xpt_create_path failed with " 6047 "status %#x for bus %d\n", status, bus->path_id); 6048 printf("xptconfigfunc: halting bus configuration\n"); 6049 xpt_free_ccb(work_ccb); 6050 busses_to_config--; 6051 xpt_finishconfig(xpt_periph, NULL); 6052 return(0); 6053 } 6054 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6055 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6056 xpt_action(work_ccb); 6057 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6058 printf("xptconfigfunc: CPI failed on bus %d " 6059 "with status %d\n", bus->path_id, 6060 work_ccb->ccb_h.status); 6061 xpt_finishconfig(xpt_periph, work_ccb); 6062 return(1); 6063 } 6064 6065 can_negotiate = work_ccb->cpi.hba_inquiry; 6066 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6067 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6068 && (can_negotiate != 0)) { 6069 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6070 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6071 work_ccb->ccb_h.cbfcnp = NULL; 6072 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6073 ("Resetting Bus\n")); 6074 xpt_action(work_ccb); 6075 xpt_finishconfig(xpt_periph, work_ccb); 6076 } else { 6077 /* Act as though we performed a successful BUS RESET */ 6078 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6079 xpt_finishconfig(xpt_periph, work_ccb); 6080 } 6081 } 6082 6083 return(1); 6084} 6085 6086static void 6087xpt_config(void *arg) 6088{ 6089 /* Now that interrupts are enabled, go find our devices */ 6090 6091#ifdef CAMDEBUG 6092 /* Setup debugging flags and path */ 6093#ifdef CAM_DEBUG_FLAGS 6094 cam_dflags = CAM_DEBUG_FLAGS; 6095#else /* !CAM_DEBUG_FLAGS */ 6096 cam_dflags = CAM_DEBUG_NONE; 6097#endif /* CAM_DEBUG_FLAGS */ 6098#ifdef CAM_DEBUG_BUS 6099 if (cam_dflags != CAM_DEBUG_NONE) { 6100 if (xpt_create_path(&cam_dpath, xpt_periph, 6101 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6102 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6103 printf("xpt_config: xpt_create_path() failed for debug" 6104 " target %d:%d:%d, debugging disabled\n", 6105 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6106 cam_dflags = CAM_DEBUG_NONE; 6107 } 6108 } else 6109 cam_dpath = NULL; 6110#else /* !CAM_DEBUG_BUS */ 6111 cam_dpath = NULL; 6112#endif /* CAM_DEBUG_BUS */ 6113#endif /* CAMDEBUG */ 6114 6115 /* 6116 * Scan all installed busses. 6117 */ 6118 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6119 6120 if (busses_to_config == 0) { 6121 /* Call manually because we don't have any busses */ 6122 xpt_finishconfig(xpt_periph, NULL); 6123 } else { 6124 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) { 6125 printf("Waiting %d seconds for SCSI " 6126 "devices to settle\n", SCSI_DELAY/1000); 6127 } 6128 xpt_for_all_busses(xptconfigfunc, NULL); 6129 } 6130} 6131 6132/* 6133 * If the given device only has one peripheral attached to it, and if that 6134 * peripheral is the passthrough driver, announce it. This insures that the 6135 * user sees some sort of announcement for every peripheral in their system. 6136 */ 6137static int 6138xptpassannouncefunc(struct cam_ed *device, void *arg) 6139{ 6140 struct cam_periph *periph; 6141 int i; 6142 6143 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6144 periph = SLIST_NEXT(periph, periph_links), i++); 6145 6146 periph = SLIST_FIRST(&device->periphs); 6147 if ((i == 1) 6148 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6149 xpt_announce_periph(periph, NULL); 6150 6151 return(1); 6152} 6153 6154static void 6155xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6156{ 6157 struct periph_driver **p_drv; 6158 int i; 6159 6160 if (done_ccb != NULL) { 6161 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6162 ("xpt_finishconfig\n")); 6163 switch(done_ccb->ccb_h.func_code) { 6164 case XPT_RESET_BUS: 6165 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6166 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6167 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6168 xpt_action(done_ccb); 6169 return; 6170 } 6171 /* FALLTHROUGH */ 6172 case XPT_SCAN_BUS: 6173 default: 6174 xpt_free_path(done_ccb->ccb_h.path); 6175 busses_to_config--; 6176 break; 6177 } 6178 } 6179 6180 if (busses_to_config == 0) { 6181 /* Register all the peripheral drivers */ 6182 /* XXX This will have to change when we have loadable modules */ 6183 p_drv = (struct periph_driver **)periphdriver_set.ls_items; 6184 for (i = 0; p_drv[i] != NULL; i++) { 6185 (*p_drv[i]->init)(); 6186 } 6187 6188 /* 6189 * Check for devices with no "standard" peripheral driver 6190 * attached. For any devices like that, announce the 6191 * passthrough driver so the user will see something. 6192 */ 6193 xpt_for_all_devices(xptpassannouncefunc, NULL); 6194 6195 /* Release our hook so that the boot can continue. */ 6196 config_intrhook_disestablish(xpt_config_hook); 6197 free(xpt_config_hook, M_TEMP); 6198 xpt_config_hook = NULL; 6199 } 6200 if (done_ccb != NULL) 6201 xpt_free_ccb(done_ccb); 6202} 6203 6204static void 6205xptaction(struct cam_sim *sim, union ccb *work_ccb) 6206{ 6207 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6208 6209 switch (work_ccb->ccb_h.func_code) { 6210 /* Common cases first */ 6211 case XPT_PATH_INQ: /* Path routing inquiry */ 6212 { 6213 struct ccb_pathinq *cpi; 6214 6215 cpi = &work_ccb->cpi; 6216 cpi->version_num = 1; /* XXX??? */ 6217 cpi->hba_inquiry = 0; 6218 cpi->target_sprt = 0; 6219 cpi->hba_misc = 0; 6220 cpi->hba_eng_cnt = 0; 6221 cpi->max_target = 0; 6222 cpi->max_lun = 0; 6223 cpi->initiator_id = 0; 6224 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6225 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6226 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6227 cpi->unit_number = sim->unit_number; 6228 cpi->bus_id = sim->bus_id; 6229 cpi->base_transfer_speed = 0; 6230 cpi->ccb_h.status = CAM_REQ_CMP; 6231 xpt_done(work_ccb); 6232 break; 6233 } 6234 default: 6235 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6236 xpt_done(work_ccb); 6237 break; 6238 } 6239} 6240 6241/* 6242 * The xpt as a "controller" has no interrupt sources, so polling 6243 * is a no-op. 6244 */ 6245static void 6246xptpoll(struct cam_sim *sim) 6247{ 6248} 6249 6250static void 6251camisr(void *V_queue) 6252{ 6253 cam_isrq_t *queue = V_queue; 6254 int s; 6255 struct ccb_hdr *ccb_h; 6256 6257 s = splcam(); 6258 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6259 int runq; 6260 6261 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6262 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6263 splx(s); 6264 6265 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6266 ("camisr")); 6267 6268 runq = FALSE; 6269 6270 if (ccb_h->flags & CAM_HIGH_POWER) { 6271 struct highpowerlist *hphead; 6272 struct cam_ed *device; 6273 union ccb *send_ccb; 6274 6275 hphead = &highpowerq; 6276 6277 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6278 6279 /* 6280 * Increment the count since this command is done. 6281 */ 6282 num_highpower++; 6283 6284 /* 6285 * Any high powered commands queued up? 6286 */ 6287 if (send_ccb != NULL) { 6288 device = send_ccb->ccb_h.path->device; 6289 6290 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6291 6292 xpt_release_devq(send_ccb->ccb_h.path, 6293 /*count*/1, /*runqueue*/TRUE); 6294 } 6295 } 6296 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6297 struct cam_ed *dev; 6298 6299 dev = ccb_h->path->device; 6300 6301 s = splcam(); 6302 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6303 6304 ccb_h->path->bus->sim->devq->send_active--; 6305 ccb_h->path->bus->sim->devq->send_openings++; 6306 splx(s); 6307 6308 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6309 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6310 && (dev->ccbq.dev_active == 0))) { 6311 6312 xpt_release_devq(ccb_h->path, /*count*/1, 6313 /*run_queue*/TRUE); 6314 } 6315 6316 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6317 && (--dev->tag_delay_count == 0)) 6318 xpt_start_tags(ccb_h->path); 6319 6320 if ((dev->ccbq.queue.entries > 0) 6321 && (dev->qfrozen_cnt == 0) 6322 && (device_is_send_queued(dev) == 0)) { 6323 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6324 dev); 6325 } 6326 } 6327 6328 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6329 xpt_release_simq(ccb_h->path->bus->sim, 6330 /*run_queue*/TRUE); 6331 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6332 runq = FALSE; 6333 } 6334 6335 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6336 && (ccb_h->status & CAM_DEV_QFRZN)) { 6337 xpt_release_devq(ccb_h->path, /*count*/1, 6338 /*run_queue*/TRUE); 6339 ccb_h->status &= ~CAM_DEV_QFRZN; 6340 } else if (runq) { 6341 xpt_run_dev_sendq(ccb_h->path->bus); 6342 } 6343 6344 /* Call the peripheral driver's callback */ 6345 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6346 6347 /* Raise IPL for while test */ 6348 s = splcam(); 6349 } 6350 splx(s); 6351} 6352