cam_xpt.c revision 45441
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 * $Id: cam_xpt.c,v 1.49 1999/03/14 05:15:38 ken Exp $ 30 */ 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/types.h> 34#include <sys/malloc.h> 35#include <sys/device.h> 36#include <sys/kernel.h> 37#include <sys/conf.h> 38#include <sys/fcntl.h> 39#include <sys/md5.h> 40#include <sys/devicestat.h> 41#include <sys/interrupt.h> 42 43#ifdef PC98 44#include <pc98/pc98/pc98_machdep.h> /* geometry translation */ 45#endif 46 47#include <machine/clock.h> 48#include <machine/ipl.h> 49 50#include <cam/cam.h> 51#include <cam/cam_conf.h> 52#include <cam/cam_ccb.h> 53#include <cam/cam_periph.h> 54#include <cam/cam_sim.h> 55#include <cam/cam_xpt.h> 56#include <cam/cam_xpt_sim.h> 57#include <cam/cam_xpt_periph.h> 58#include <cam/cam_debug.h> 59 60#include <cam/scsi/scsi_all.h> 61#include <cam/scsi/scsi_message.h> 62#include <cam/scsi/scsi_pass.h> 63#include "opt_cam.h" 64#include "opt_scsi.h" 65 66extern void (*ihandlers[32]) __P((void)); 67 68/* Datastructures internal to the xpt layer */ 69 70/* 71 * Definition of an async handler callback block. These are used to add 72 * SIMs and peripherals to the async callback lists. 73 */ 74struct async_node { 75 SLIST_ENTRY(async_node) links; 76 u_int32_t event_enable; /* Async Event enables */ 77 void (*callback)(void *arg, u_int32_t code, 78 struct cam_path *path, void *args); 79 void *callback_arg; 80}; 81 82SLIST_HEAD(async_list, async_node); 83SLIST_HEAD(periph_list, cam_periph); 84static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 85 86/* 87 * This is the maximum number of high powered commands (e.g. start unit) 88 * that can be outstanding at a particular time. 89 */ 90#ifndef CAM_MAX_HIGHPOWER 91#define CAM_MAX_HIGHPOWER 4 92#endif 93 94/* 95 * This is the number of seconds we wait for devices to settle after a SCSI 96 * bus reset. 97 */ 98#ifndef SCSI_DELAY 99#define SCSI_DELAY 2000 100#endif 101/* 102 * If someone sets this to 0, we assume that they want the minimum 103 * allowable bus settle delay. All devices need _some_ sort of bus settle 104 * delay, so we'll set it to a minimum value of 100ms. 105 */ 106#if (SCSI_DELAY == 0) 107#undef SCSI_DELAY 108#define SCSI_DELAY 100 109#endif 110 111/* 112 * Make sure the user isn't using seconds instead of milliseconds. 113 */ 114#if (SCSI_DELAY < 100) 115#error "SCSI_DELAY is in milliseconds, not seconds! Please use a larger value" 116#endif 117 118/* number of high powered commands that can go through right now */ 119static int num_highpower = CAM_MAX_HIGHPOWER; 120 121/* 122 * Structure for queueing a device in a run queue. 123 * There is one run queue for allocating new ccbs, 124 * and another for sending ccbs to the controller. 125 */ 126struct cam_ed_qinfo { 127 cam_pinfo pinfo; 128 struct cam_ed *device; 129}; 130 131/* 132 * The CAM EDT (Existing Device Table) contains the device information for 133 * all devices for all busses in the system. The table contains a 134 * cam_ed structure for each device on the bus. 135 */ 136struct cam_ed { 137 TAILQ_ENTRY(cam_ed) links; 138 struct cam_ed_qinfo alloc_ccb_entry; 139 struct cam_ed_qinfo send_ccb_entry; 140 struct cam_et *target; 141 lun_id_t lun_id; 142 struct camq drvq; /* 143 * Queue of type drivers wanting to do 144 * work on this device. 145 */ 146 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 147 struct async_list asyncs; /* Async callback info for this B/T/L */ 148 struct periph_list periphs; /* All attached devices */ 149 u_int generation; /* Generation number */ 150 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 151 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 152 /* Storage for the inquiry data */ 153 struct scsi_inquiry_data inq_data; 154 u_int8_t inq_flags; /* 155 * Current settings for inquiry flags. 156 * This allows us to override settings 157 * like disconnection and tagged 158 * queuing for a device. 159 */ 160 u_int8_t queue_flags; /* Queue flags from the control page */ 161 u_int8_t *serial_num; 162 u_int8_t serial_num_len; 163 u_int32_t qfrozen_cnt; 164 u_int32_t flags; 165#define CAM_DEV_UNCONFIGURED 0x01 166#define CAM_DEV_REL_TIMEOUT_PENDING 0x02 167#define CAM_DEV_REL_ON_COMPLETE 0x04 168#define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 169#define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 170#define CAM_DEV_TAG_AFTER_COUNT 0x20 171 u_int32_t tag_delay_count; 172#define CAM_TAG_DELAY_COUNT 5 173 u_int32_t refcount; 174 struct callout_handle c_handle; 175}; 176 177/* 178 * Each target is represented by an ET (Existing Target). These 179 * entries are created when a target is successfully probed with an 180 * identify, and removed when a device fails to respond after a number 181 * of retries, or a bus rescan finds the device missing. 182 */ 183struct cam_et { 184 TAILQ_HEAD(, cam_ed) ed_entries; 185 TAILQ_ENTRY(cam_et) links; 186 struct cam_eb *bus; 187 target_id_t target_id; 188 u_int32_t refcount; 189 u_int generation; 190}; 191 192/* 193 * Each bus is represented by an EB (Existing Bus). These entries 194 * are created by calls to xpt_bus_register and deleted by calls to 195 * xpt_bus_deregister. 196 */ 197struct cam_eb { 198 TAILQ_HEAD(, cam_et) et_entries; 199 TAILQ_ENTRY(cam_eb) links; 200 path_id_t path_id; 201 struct cam_sim *sim; 202 u_int32_t flags; 203#define CAM_EB_RUNQ_SCHEDULED 0x01 204 u_int32_t refcount; 205 u_int generation; 206}; 207 208struct cam_path { 209 struct cam_periph *periph; 210 struct cam_eb *bus; 211 struct cam_et *target; 212 struct cam_ed *device; 213}; 214 215struct xpt_quirk_entry { 216 struct scsi_inquiry_pattern inq_pat; 217 u_int8_t quirks; 218#define CAM_QUIRK_NOLUNS 0x01 219#define CAM_QUIRK_NOSERIAL 0x02 220 u_int8_t mintags; 221 u_int8_t maxtags; 222}; 223 224typedef enum { 225 XPT_FLAG_OPEN = 0x01 226} xpt_flags; 227 228struct xpt_softc { 229 xpt_flags flags; 230 u_int32_t generation; 231#ifdef DEVFS 232 void *xpt_devfs_token; 233 void *ctl_devfs_token; 234#endif 235}; 236 237static const char quantum[] = "QUANTUM"; 238static const char sony[] = "SONY"; 239static const char west_digital[] = "WDIGTL"; 240static const char samsung[] = "SAMSUNG"; 241static const char seagate[] = "SEAGATE"; 242 243static struct xpt_quirk_entry xpt_quirk_table[] = 244{ 245 { 246 /* Reports QUEUE FULL for temporary resource shortages */ 247 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 248 /*quirks*/0, /*mintags*/24, /*maxtags*/32 249 }, 250 { 251 /* Reports QUEUE FULL for temporary resource shortages */ 252 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 253 /*quirks*/0, /*mintags*/24, /*maxtags*/32 254 }, 255 { 256 /* Reports QUEUE FULL for temporary resource shortages */ 257 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 258 /*quirks*/0, /*mintags*/24, /*maxtags*/32 259 }, 260 { 261 /* Broken tagged queuing drive */ 262 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 263 /*quirks*/0, /*mintags*/0, /*maxtags*/0 264 }, 265 { 266 /* Broken tagged queuing drive */ 267 { T_DIRECT, SIP_MEDIA_FIXED, "MICROP", "3391*", "x43h" }, 268 /*quirks*/0, /*mintags*/0, /*maxtags*/0 269 }, 270 { 271 /* 272 * Unfortunately, the Quantum Atlas III has the same 273 * problem as the Atlas II drives above. 274 * Reported by: "Johan Granlund" <johan@granlund.nu> 275 * 276 * For future reference, the drive with the problem was: 277 * QUANTUM QM39100TD-SW N1B0 278 * 279 * It's possible that Quantum will fix the problem in later 280 * firmware revisions. If that happens, the quirk entry 281 * will need to be made specific to the firmware revisions 282 * with the problem. 283 * 284 */ 285 /* Reports QUEUE FULL for temporary resource shortages */ 286 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 287 /*quirks*/0, /*mintags*/24, /*maxtags*/32 288 }, 289 { 290 /* 291 * 18 Gig Atlas III, same problem as the 9G version. 292 * Reported by: Andre Albsmeier 293 * <andre.albsmeier@mchp.siemens.de> 294 * 295 * For future reference, the drive with the problem was: 296 * QUANTUM QM318000TD-S N491 297 */ 298 /* Reports QUEUE FULL for temporary resource shortages */ 299 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 300 /*quirks*/0, /*mintags*/24, /*maxtags*/32 301 }, 302 { 303 /* 304 * Broken tagged queuing drive 305 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 306 * and: Martin Renters <martin@tdc.on.ca> 307 */ 308 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 309 /*quirks*/0, /*mintags*/0, /*maxtags*/0 310 }, 311 /* 312 * The Seagate Medalist Pro drives have very poor write 313 * performance with anything more than 2 tags. 314 * 315 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 316 * Drive: <SEAGATE ST36530N 1444> 317 * 318 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 319 * Drive: <SEAGATE ST34520W 1281> 320 * 321 * No one has actually reported that the 9G version 322 * (ST39140*) of the Medalist Pro has the same problem, but 323 * we're assuming that it does because the 4G and 6.5G 324 * versions of the drive are broken. 325 */ 326 { 327 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 328 /*quirks*/0, /*mintags*/2, /*maxtags*/2 329 }, 330 { 331 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 332 /*quirks*/0, /*mintags*/2, /*maxtags*/2 333 }, 334 { 335 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 336 /*quirks*/0, /*mintags*/2, /*maxtags*/2 337 }, 338 { 339 /* 340 * Slow when tagged queueing is enabled. Write performance 341 * steadily drops off with more and more concurrent 342 * transactions. Best sequential write performance with 343 * tagged queueing turned off and write caching turned on. 344 * 345 * PR: kern/10398 346 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 347 * Drive: DCAS-34330 w/ "S65A" firmware. 348 * 349 * The drive with the problem had the "S65A" firmware 350 * revision, and has also been reported (by Stephen J. 351 * Roznowski <sjr@home.net>) for a drive with the "S61A" 352 * firmware revision. 353 * 354 * Although no one has reported problems with the 2 gig 355 * version of the DCAS drive, the assumption is that it 356 * has the same problems as the 4 gig version. Therefore 357 * this quirk entries disables tagged queueing for all 358 * DCAS drives. 359 */ 360 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 361 /*quirks*/0, /*mintags*/0, /*maxtags*/0 362 }, 363 { 364 /* Broken tagged queuing drive */ 365 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 366 /*quirks*/0, /*mintags*/0, /*maxtags*/0 367 }, 368 { 369 /* Broken tagged queuing drive */ 370 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 371 /*quirks*/0, /*mintags*/0, /*maxtags*/0 372 }, 373 { 374 /* 375 * Broken tagged queuing drive. 376 * Submitted by: 377 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 378 * in PR kern/9535 379 */ 380 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 381 /*quirks*/0, /*mintags*/0, /*maxtags*/0 382 }, 383 { 384 /* 385 * Slow when tagged queueing is enabled. (1.5MB/sec versus 386 * 8MB/sec.) 387 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 388 * Best performance with these drives is achieved with 389 * tagged queueing turned off, and write caching turned on. 390 */ 391 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 392 /*quirks*/0, /*mintags*/0, /*maxtags*/0 393 }, 394 { 395 /* 396 * Slow when tagged queueing is enabled. (1.5MB/sec versus 397 * 8MB/sec.) 398 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 399 * Best performance with these drives is achieved with 400 * tagged queueing turned off, and write caching turned on. 401 */ 402 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 403 /*quirks*/0, /*mintags*/0, /*maxtags*/0 404 }, 405 { 406 /* 407 * Doesn't handle queue full condition correctly, 408 * so we need to limit maxtags to what the device 409 * can handle instead of determining this automatically. 410 */ 411 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 412 /*quirks*/0, /*mintags*/2, /*maxtags*/32 413 }, 414 { 415 /* Really only one LUN */ 416 { 417 T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA*", "*" 418 }, 419 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 420 }, 421 { 422 /* I can't believe we need a quirk for DPT volumes. */ 423 { 424 T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, 425 "DPT", "*", "*" 426 }, 427 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 428 /*mintags*/0, /*maxtags*/255 429 }, 430 { 431 /* 432 * Many Sony CDROM drives don't like multi-LUN probing. 433 */ 434 { 435 T_CDROM, SIP_MEDIA_REMOVABLE, sony, 436 "CD-ROM CDU*", "*" 437 }, 438 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 439 }, 440 { 441 /* 442 * This drive doesn't like multiple LUN probing. 443 * Submitted by: Parag Patel <parag@cgt.com> 444 */ 445 { 446 T_WORM, SIP_MEDIA_REMOVABLE, sony, 447 "CD-R CDU9*", "*" 448 }, 449 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 450 }, 451 { 452 /* 453 * The 8200 doesn't like multi-lun probing, and probably 454 * don't like serial number requests either. 455 */ 456 { 457 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 458 "EXB-8200*", "*" 459 }, 460 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 461 }, 462 { 463 /* 464 * This old revision of the TDC3600 is also SCSI-1, and 465 * hangs upon serial number probing. 466 */ 467 { 468 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 469 " TDC 3600", "U07:" 470 }, 471 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 472 }, 473 { 474 /* Default tagged queuing parameters for all devices */ 475 { 476 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 477 /*vendor*/"*", /*product*/"*", /*revision*/"*" 478 }, 479 /*quirks*/0, /*mintags*/2, /*maxtags*/255 480 }, 481}; 482 483typedef enum { 484 DM_RET_COPY = 0x01, 485 DM_RET_FLAG_MASK = 0x0f, 486 DM_RET_NONE = 0x00, 487 DM_RET_STOP = 0x10, 488 DM_RET_DESCEND = 0x20, 489 DM_RET_ERROR = 0x30, 490 DM_RET_ACTION_MASK = 0xf0 491} dev_match_ret; 492 493typedef enum { 494 XPT_DEPTH_BUS, 495 XPT_DEPTH_TARGET, 496 XPT_DEPTH_DEVICE, 497 XPT_DEPTH_PERIPH 498} xpt_traverse_depth; 499 500struct xpt_traverse_config { 501 xpt_traverse_depth depth; 502 void *tr_func; 503 void *tr_arg; 504}; 505 506typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 507typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 508typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 509typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 510typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 511 512/* Transport layer configuration information */ 513static struct xpt_softc xsoftc; 514 515/* Queues for our software interrupt handler */ 516typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 517static cam_isrq_t cam_bioq; 518static cam_isrq_t cam_netq; 519 520/* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 521static SLIST_HEAD(,ccb_hdr) ccb_freeq; 522static u_int xpt_max_ccbs; /* 523 * Maximum size of ccb pool. Modified as 524 * devices are added/removed or have their 525 * opening counts changed. 526 */ 527static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 528 529static struct cam_periph *xpt_periph; 530 531static periph_init_t xpt_periph_init; 532 533static periph_init_t probe_periph_init; 534 535static struct periph_driver xpt_driver = 536{ 537 xpt_periph_init, "xpt", 538 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 539}; 540 541static struct periph_driver probe_driver = 542{ 543 probe_periph_init, "probe", 544 TAILQ_HEAD_INITIALIZER(probe_driver.units) 545}; 546 547DATA_SET(periphdriver_set, xpt_driver); 548DATA_SET(periphdriver_set, probe_driver); 549 550#define XPT_CDEV_MAJOR 104 551 552static d_open_t xptopen; 553static d_close_t xptclose; 554static d_ioctl_t xptioctl; 555 556static struct cdevsw xpt_cdevsw = 557{ 558 /*d_open*/ xptopen, 559 /*d_close*/ xptclose, 560 /*d_read*/ noread, 561 /*d_write*/ nowrite, 562 /*d_ioctl*/ xptioctl, 563 /*d_stop*/ nostop, 564 /*d_reset*/ noreset, 565 /*d_devtotty*/ nodevtotty, 566 /*d_poll*/ NULL, 567 /*d_mmap*/ nommap, 568 /*d_strategy*/ nostrategy, 569 /*d_name*/ "xpt", 570 /*d_spare*/ NULL, 571 /*d_maj*/ -1, 572 /*d_dump*/ nodump, 573 /*d_psize*/ nopsize, 574 /*d_flags*/ 0, 575 /*d_maxio*/ 0, 576 /*b_maj*/ -1 577}; 578 579static struct intr_config_hook *xpt_config_hook; 580 581/* Registered busses */ 582static TAILQ_HEAD(,cam_eb) xpt_busses; 583static u_int bus_generation; 584 585/* Storage for debugging datastructures */ 586#ifdef CAMDEBUG 587struct cam_path *cam_dpath; 588u_int32_t cam_dflags; 589#endif 590 591#if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 592#error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 593#endif 594 595/* 596 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 597 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 598 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 599 */ 600#if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 601 || defined(CAM_DEBUG_LUN) 602#ifdef CAMDEBUG 603#if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 604 || !defined(CAM_DEBUG_LUN) 605#error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 606 and CAM_DEBUG_LUN" 607#endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 608#else /* !CAMDEBUG */ 609#error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 610#endif /* CAMDEBUG */ 611#endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 612 613/* Our boot-time initialization hook */ 614static void xpt_init(void *); 615SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL); 616 617static cam_status xpt_compile_path(struct cam_path *new_path, 618 struct cam_periph *perph, 619 path_id_t path_id, 620 target_id_t target_id, 621 lun_id_t lun_id); 622 623static void xpt_release_path(struct cam_path *path); 624 625static void xpt_async_bcast(struct async_list *async_head, 626 u_int32_t async_code, 627 struct cam_path *path, 628 void *async_arg); 629static int xptnextfreebus(path_id_t startbus); 630static int xptpathid(const char *sim_name, int sim_unit, int sim_bus, 631 path_id_t *nextpath); 632static union ccb *xpt_get_ccb(struct cam_ed *device); 633static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 634 u_int32_t new_priority); 635static void xpt_run_dev_allocq(struct cam_eb *bus); 636static void xpt_run_dev_sendq(struct cam_eb *bus); 637static timeout_t xpt_release_devq_timeout; 638static timeout_t xpt_release_simq_timeout; 639static void xpt_release_bus(struct cam_eb *bus); 640static struct cam_et* 641 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 642static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 643static struct cam_ed* 644 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 645 lun_id_t lun_id); 646static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 647 struct cam_ed *device); 648static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 649static struct cam_eb* 650 xpt_find_bus(path_id_t path_id); 651static struct cam_et* 652 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 653static struct cam_ed* 654 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 655static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 656static void xpt_scan_lun(struct cam_periph *periph, 657 struct cam_path *path, cam_flags flags, 658 union ccb *ccb); 659static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 660static xpt_busfunc_t xptconfigbuscountfunc; 661static xpt_busfunc_t xptconfigfunc; 662static void xpt_config(void *arg); 663static xpt_devicefunc_t xptpassannouncefunc; 664static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 665static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 666static swihand_t swi_camnet; 667static swihand_t swi_cambio; 668static void camisr(cam_isrq_t *queue); 669#if 0 670static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 671static void xptasync(struct cam_periph *periph, 672 u_int32_t code, cam_path *path); 673#endif 674static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 675 int num_patterns, struct cam_eb *bus); 676static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 677 int num_patterns, struct cam_ed *device); 678static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 679 int num_patterns, 680 struct cam_periph *periph); 681static xpt_busfunc_t xptedtbusfunc; 682static xpt_targetfunc_t xptedttargetfunc; 683static xpt_devicefunc_t xptedtdevicefunc; 684static xpt_periphfunc_t xptedtperiphfunc; 685static xpt_pdrvfunc_t xptplistpdrvfunc; 686static xpt_periphfunc_t xptplistperiphfunc; 687static int xptedtmatch(struct ccb_dev_match *cdm); 688static int xptperiphlistmatch(struct ccb_dev_match *cdm); 689static int xptbustraverse(struct cam_eb *start_bus, 690 xpt_busfunc_t *tr_func, void *arg); 691static int xpttargettraverse(struct cam_eb *bus, 692 struct cam_et *start_target, 693 xpt_targetfunc_t *tr_func, void *arg); 694static int xptdevicetraverse(struct cam_et *target, 695 struct cam_ed *start_device, 696 xpt_devicefunc_t *tr_func, void *arg); 697static int xptperiphtraverse(struct cam_ed *device, 698 struct cam_periph *start_periph, 699 xpt_periphfunc_t *tr_func, void *arg); 700static int xptpdrvtraverse(struct periph_driver **start_pdrv, 701 xpt_pdrvfunc_t *tr_func, void *arg); 702static int xptpdperiphtraverse(struct periph_driver **pdrv, 703 struct cam_periph *start_periph, 704 xpt_periphfunc_t *tr_func, 705 void *arg); 706static xpt_busfunc_t xptdefbusfunc; 707static xpt_targetfunc_t xptdeftargetfunc; 708static xpt_devicefunc_t xptdefdevicefunc; 709static xpt_periphfunc_t xptdefperiphfunc; 710static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 711#ifdef notusedyet 712static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 713 void *arg); 714#endif 715static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 716 void *arg); 717#ifdef notusedyet 718static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 719 void *arg); 720#endif 721static xpt_devicefunc_t xptsetasyncfunc; 722static xpt_busfunc_t xptsetasyncbusfunc; 723static cam_status xptregister(struct cam_periph *periph, 724 void *arg); 725static cam_status proberegister(struct cam_periph *periph, 726 void *arg); 727static void probeschedule(struct cam_periph *probe_periph); 728static void probestart(struct cam_periph *periph, union ccb *start_ccb); 729static void probedone(struct cam_periph *periph, union ccb *done_ccb); 730static void probecleanup(struct cam_periph *periph); 731static void xpt_find_quirk(struct cam_ed *device); 732static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 733 struct cam_ed *device, 734 int async_update); 735static void xpt_toggle_tags(struct cam_path *path); 736static void xpt_start_tags(struct cam_path *path); 737static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 738 struct cam_ed *dev); 739static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 740 struct cam_ed *dev); 741static __inline int periph_is_queued(struct cam_periph *periph); 742static __inline int device_is_alloc_queued(struct cam_ed *device); 743static __inline int device_is_send_queued(struct cam_ed *device); 744static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 745 746static __inline int 747xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 748{ 749 int retval; 750 751 if (dev->ccbq.devq_openings > 0) { 752 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 753 cam_ccbq_resize(&dev->ccbq, 754 dev->ccbq.dev_openings 755 + dev->ccbq.dev_active); 756 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 757 } 758 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 759 &dev->alloc_ccb_entry.pinfo, 760 dev->drvq.queue_array[0]->priority); 761 } else { 762 retval = 0; 763 } 764 765 return (retval); 766} 767 768static __inline int 769xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 770{ 771 int retval; 772 773 if (dev->ccbq.dev_openings > 0) { 774 retval = xpt_schedule_dev(&bus->sim->devq->send_queue, 775 &dev->send_ccb_entry.pinfo, 776 dev->ccbq.queue.queue_array[0]->priority); 777 } else { 778 retval = 0; 779 } 780 return (retval); 781} 782 783static __inline int 784periph_is_queued(struct cam_periph *periph) 785{ 786 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 787} 788 789static __inline int 790device_is_alloc_queued(struct cam_ed *device) 791{ 792 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 793} 794 795static __inline int 796device_is_send_queued(struct cam_ed *device) 797{ 798 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 799} 800 801static __inline int 802dev_allocq_is_runnable(struct cam_devq *devq) 803{ 804 /* 805 * Have work to do. 806 * Have space to do more work. 807 * Allowed to do work. 808 */ 809 return ((devq->alloc_queue.qfrozen_cnt == 0) 810 && (devq->alloc_queue.entries > 0) 811 && (devq->alloc_openings > 0)); 812} 813 814static void 815xpt_periph_init() 816{ 817 dev_t dev; 818 819 dev = makedev(XPT_CDEV_MAJOR, 0); 820 cdevsw_add(&dev, &xpt_cdevsw, NULL); 821} 822 823static void 824probe_periph_init() 825{ 826} 827 828 829static void 830xptdone(struct cam_periph *periph, union ccb *done_ccb) 831{ 832 /* Caller will release the CCB */ 833 wakeup(&done_ccb->ccb_h.cbfcnp); 834} 835 836static int 837xptopen(dev_t dev, int flags, int fmt, struct proc *p) 838{ 839 int unit; 840 841 unit = minor(dev) & 0xff; 842 843 /* 844 * Only allow read-write access. 845 */ 846 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 847 return(EPERM); 848 849 /* 850 * We don't allow nonblocking access. 851 */ 852 if ((flags & O_NONBLOCK) != 0) { 853 printf("xpt%d: can't do nonblocking accesss\n", unit); 854 return(ENODEV); 855 } 856 857 /* 858 * We only have one transport layer right now. If someone accesses 859 * us via something other than minor number 1, point out their 860 * mistake. 861 */ 862 if (unit != 0) { 863 printf("xptopen: got invalid xpt unit %d\n", unit); 864 return(ENXIO); 865 } 866 867 /* Mark ourselves open */ 868 xsoftc.flags |= XPT_FLAG_OPEN; 869 870 return(0); 871} 872 873static int 874xptclose(dev_t dev, int flag, int fmt, struct proc *p) 875{ 876 int unit; 877 878 unit = minor(dev) & 0xff; 879 880 /* 881 * We only have one transport layer right now. If someone accesses 882 * us via something other than minor number 1, point out their 883 * mistake. 884 */ 885 if (unit != 0) { 886 printf("xptclose: got invalid xpt unit %d\n", unit); 887 return(ENXIO); 888 } 889 890 /* Mark ourselves closed */ 891 xsoftc.flags &= ~XPT_FLAG_OPEN; 892 893 return(0); 894} 895 896static int 897xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 898{ 899 int unit, error; 900 901 error = 0; 902 unit = minor(dev) & 0xff; 903 904 /* 905 * We only have one transport layer right now. If someone accesses 906 * us via something other than minor number 1, point out their 907 * mistake. 908 */ 909 if (unit != 0) { 910 printf("xptioctl: got invalid xpt unit %d\n", unit); 911 return(ENXIO); 912 } 913 914 switch(cmd) { 915 /* 916 * For the transport layer CAMIOCOMMAND ioctl, we really only want 917 * to accept CCB types that don't quite make sense to send through a 918 * passthrough driver. 919 */ 920 case CAMIOCOMMAND: { 921 union ccb *ccb; 922 union ccb *inccb; 923 924 inccb = (union ccb *)addr; 925 926 switch(inccb->ccb_h.func_code) { 927 case XPT_SCAN_BUS: 928 case XPT_RESET_BUS: 929 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 930 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 931 error = EINVAL; 932 break; 933 } 934 /* FALLTHROUGH */ 935 case XPT_SCAN_LUN: 936 case XPT_ENG_INQ: /* XXX not implemented yet */ 937 case XPT_ENG_EXEC: 938 939 ccb = xpt_alloc_ccb(); 940 941 /* 942 * Create a path using the bus, target, and lun the 943 * user passed in. 944 */ 945 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 946 inccb->ccb_h.path_id, 947 inccb->ccb_h.target_id, 948 inccb->ccb_h.target_lun) != 949 CAM_REQ_CMP){ 950 error = EINVAL; 951 xpt_free_ccb(ccb); 952 break; 953 } 954 /* Ensure all of our fields are correct */ 955 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 956 inccb->ccb_h.pinfo.priority); 957 xpt_merge_ccb(ccb, inccb); 958 ccb->ccb_h.cbfcnp = xptdone; 959 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 960 bcopy(ccb, inccb, sizeof(union ccb)); 961 xpt_free_path(ccb->ccb_h.path); 962 xpt_free_ccb(ccb); 963 break; 964 965 case XPT_DEBUG: { 966 union ccb ccb; 967 968 /* 969 * This is an immediate CCB, so it's okay to 970 * allocate it on the stack. 971 */ 972 973 /* 974 * Create a path using the bus, target, and lun the 975 * user passed in. 976 */ 977 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 978 inccb->ccb_h.path_id, 979 inccb->ccb_h.target_id, 980 inccb->ccb_h.target_lun) != 981 CAM_REQ_CMP){ 982 error = EINVAL; 983 break; 984 } 985 /* Ensure all of our fields are correct */ 986 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 987 inccb->ccb_h.pinfo.priority); 988 xpt_merge_ccb(&ccb, inccb); 989 ccb.ccb_h.cbfcnp = xptdone; 990 xpt_action(&ccb); 991 bcopy(&ccb, inccb, sizeof(union ccb)); 992 xpt_free_path(ccb.ccb_h.path); 993 break; 994 995 } 996 case XPT_DEV_MATCH: { 997 struct cam_periph_map_info mapinfo; 998 struct cam_path *old_path; 999 1000 /* 1001 * We can't deal with physical addresses for this 1002 * type of transaction. 1003 */ 1004 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1005 error = EINVAL; 1006 break; 1007 } 1008 1009 /* 1010 * Save this in case the caller had it set to 1011 * something in particular. 1012 */ 1013 old_path = inccb->ccb_h.path; 1014 1015 /* 1016 * We really don't need a path for the matching 1017 * code. The path is needed because of the 1018 * debugging statements in xpt_action(). They 1019 * assume that the CCB has a valid path. 1020 */ 1021 inccb->ccb_h.path = xpt_periph->path; 1022 1023 bzero(&mapinfo, sizeof(mapinfo)); 1024 1025 /* 1026 * Map the pattern and match buffers into kernel 1027 * virtual address space. 1028 */ 1029 error = cam_periph_mapmem(inccb, &mapinfo); 1030 1031 if (error) { 1032 inccb->ccb_h.path = old_path; 1033 break; 1034 } 1035 1036 /* 1037 * This is an immediate CCB, we can send it on directly. 1038 */ 1039 xpt_action(inccb); 1040 1041 /* 1042 * Map the buffers back into user space. 1043 */ 1044 cam_periph_unmapmem(inccb, &mapinfo); 1045 1046 inccb->ccb_h.path = old_path; 1047 1048 error = 0; 1049 break; 1050 } 1051 default: 1052 error = EINVAL; 1053 break; 1054 } 1055 break; 1056 } 1057 /* 1058 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1059 * with the periphal driver name and unit name filled in. The other 1060 * fields don't really matter as input. The passthrough driver name 1061 * ("pass"), and unit number are passed back in the ccb. The current 1062 * device generation number, and the index into the device peripheral 1063 * driver list, and the status are also passed back. Note that 1064 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1065 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1066 * (or rather should be) impossible for the device peripheral driver 1067 * list to change since we look at the whole thing in one pass, and 1068 * we do it with splcam protection. 1069 * 1070 */ 1071 case CAMGETPASSTHRU: { 1072 union ccb *ccb; 1073 struct cam_periph *periph; 1074 struct periph_driver **p_drv; 1075 char *name; 1076 int unit; 1077 int cur_generation; 1078 int base_periph_found; 1079 int splbreaknum; 1080 int s; 1081 1082 ccb = (union ccb *)addr; 1083 unit = ccb->cgdl.unit_number; 1084 name = ccb->cgdl.periph_name; 1085 /* 1086 * Every 100 devices, we want to drop our spl protection to 1087 * give the software interrupt handler a chance to run. 1088 * Most systems won't run into this check, but this should 1089 * avoid starvation in the software interrupt handler in 1090 * large systems. 1091 */ 1092 splbreaknum = 100; 1093 1094 ccb = (union ccb *)addr; 1095 1096 base_periph_found = 0; 1097 1098 /* 1099 * Sanity check -- make sure we don't get a null peripheral 1100 * driver name. 1101 */ 1102 if (*ccb->cgdl.periph_name == '\0') { 1103 error = EINVAL; 1104 break; 1105 } 1106 1107 /* Keep the list from changing while we traverse it */ 1108 s = splcam(); 1109ptstartover: 1110 cur_generation = xsoftc.generation; 1111 1112 /* first find our driver in the list of drivers */ 1113 for (p_drv = (struct periph_driver **)periphdriver_set.ls_items; 1114 *p_drv != NULL; p_drv++) 1115 if (strcmp((*p_drv)->driver_name, name) == 0) 1116 break; 1117 1118 if (*p_drv == NULL) { 1119 splx(s); 1120 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1121 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1122 *ccb->cgdl.periph_name = '\0'; 1123 ccb->cgdl.unit_number = 0; 1124 error = ENOENT; 1125 break; 1126 } 1127 1128 /* 1129 * Run through every peripheral instance of this driver 1130 * and check to see whether it matches the unit passed 1131 * in by the user. If it does, get out of the loops and 1132 * find the passthrough driver associated with that 1133 * peripheral driver. 1134 */ 1135 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 1136 periph = TAILQ_NEXT(periph, unit_links)) { 1137 1138 if (periph->unit_number == unit) { 1139 break; 1140 } else if (--splbreaknum == 0) { 1141 splx(s); 1142 s = splcam(); 1143 splbreaknum = 100; 1144 if (cur_generation != xsoftc.generation) 1145 goto ptstartover; 1146 } 1147 } 1148 /* 1149 * If we found the peripheral driver that the user passed 1150 * in, go through all of the peripheral drivers for that 1151 * particular device and look for a passthrough driver. 1152 */ 1153 if (periph != NULL) { 1154 struct cam_ed *device; 1155 int i; 1156 1157 base_periph_found = 1; 1158 device = periph->path->device; 1159 for (i = 0, periph = device->periphs.slh_first; 1160 periph != NULL; 1161 periph = periph->periph_links.sle_next, i++) { 1162 /* 1163 * Check to see whether we have a 1164 * passthrough device or not. 1165 */ 1166 if (strcmp(periph->periph_name, "pass") == 0) { 1167 /* 1168 * Fill in the getdevlist fields. 1169 */ 1170 strcpy(ccb->cgdl.periph_name, 1171 periph->periph_name); 1172 ccb->cgdl.unit_number = 1173 periph->unit_number; 1174 if (periph->periph_links.sle_next) 1175 ccb->cgdl.status = 1176 CAM_GDEVLIST_MORE_DEVS; 1177 else 1178 ccb->cgdl.status = 1179 CAM_GDEVLIST_LAST_DEVICE; 1180 ccb->cgdl.generation = 1181 device->generation; 1182 ccb->cgdl.index = i; 1183 /* 1184 * Fill in some CCB header fields 1185 * that the user may want. 1186 */ 1187 ccb->ccb_h.path_id = 1188 periph->path->bus->path_id; 1189 ccb->ccb_h.target_id = 1190 periph->path->target->target_id; 1191 ccb->ccb_h.target_lun = 1192 periph->path->device->lun_id; 1193 ccb->ccb_h.status = CAM_REQ_CMP; 1194 break; 1195 } 1196 } 1197 } 1198 1199 /* 1200 * If the periph is null here, one of two things has 1201 * happened. The first possibility is that we couldn't 1202 * find the unit number of the particular peripheral driver 1203 * that the user is asking about. e.g. the user asks for 1204 * the passthrough driver for "da11". We find the list of 1205 * "da" peripherals all right, but there is no unit 11. 1206 * The other possibility is that we went through the list 1207 * of peripheral drivers attached to the device structure, 1208 * but didn't find one with the name "pass". Either way, 1209 * we return ENOENT, since we couldn't find something. 1210 */ 1211 if (periph == NULL) { 1212 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1213 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1214 *ccb->cgdl.periph_name = '\0'; 1215 ccb->cgdl.unit_number = 0; 1216 error = ENOENT; 1217 /* 1218 * It is unfortunate that this is even necessary, 1219 * but there are many, many clueless users out there. 1220 * If this is true, the user is looking for the 1221 * passthrough driver, but doesn't have one in his 1222 * kernel. 1223 */ 1224 if (base_periph_found == 1) { 1225 printf("xptioctl: pass driver is not in the " 1226 "kernel\n"); 1227 printf("xptioctl: put \"device pass0\" in " 1228 "your kernel config file\n"); 1229 } 1230 } 1231 splx(s); 1232 break; 1233 } 1234 default: 1235 error = ENOTTY; 1236 break; 1237 } 1238 1239 return(error); 1240} 1241 1242/* Functions accessed by the peripheral drivers */ 1243static void 1244xpt_init(dummy) 1245 void *dummy; 1246{ 1247 struct cam_sim *xpt_sim; 1248 struct cam_path *path; 1249 struct cam_devq; 1250 cam_status status; 1251 1252 TAILQ_INIT(&xpt_busses); 1253 TAILQ_INIT(&cam_bioq); 1254 TAILQ_INIT(&cam_netq); 1255 SLIST_INIT(&ccb_freeq); 1256 STAILQ_INIT(&highpowerq); 1257 1258 /* 1259 * The xpt layer is, itself, the equivelent of a SIM. 1260 * Allow 16 ccbs in the ccb pool for it. This should 1261 * give decent parallelism when we probe busses and 1262 * perform other XPT functions. 1263 */ 1264 xpt_sim = (struct cam_sim *)malloc(sizeof(*xpt_sim), 1265 M_DEVBUF, M_WAITOK); 1266 xpt_sim->sim_action = xptaction; 1267 xpt_sim->sim_name = "xpt"; 1268 xpt_sim->path_id = CAM_XPT_PATH_ID; 1269 xpt_sim->bus_id = 0; 1270 xpt_sim->max_tagged_dev_openings = 0; 1271 xpt_sim->max_dev_openings = 0; 1272 xpt_sim->devq = cam_simq_alloc(16); 1273 xpt_max_ccbs = 16; 1274 1275 xpt_bus_register(xpt_sim, 0); 1276 1277 /* 1278 * Looking at the XPT from the SIM layer, the XPT is 1279 * the equivelent of a peripheral driver. Allocate 1280 * a peripheral driver entry for us. 1281 */ 1282 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1283 CAM_TARGET_WILDCARD, 1284 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1285 printf("xpt_init: xpt_create_path failed with status %#x," 1286 " failing attach\n", status); 1287 return; 1288 } 1289 1290 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1291 path, NULL, 0, NULL); 1292 xpt_free_path(path); 1293 1294 xpt_sim->softc = xpt_periph; 1295 1296 /* 1297 * Register a callback for when interrupts are enabled. 1298 */ 1299 xpt_config_hook = 1300 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 1301 M_TEMP, M_NOWAIT); 1302 if (xpt_config_hook == NULL) { 1303 printf("xpt_init: Cannot malloc config hook " 1304 "- failing attach\n"); 1305 return; 1306 } 1307 bzero(xpt_config_hook, sizeof(*xpt_config_hook)); 1308 1309 xpt_config_hook->ich_func = xpt_config; 1310 if (config_intrhook_establish(xpt_config_hook) != 0) { 1311 free (xpt_config_hook, M_TEMP); 1312 printf("xpt_init: config_intrhook_establish failed " 1313 "- failing attach\n"); 1314 } 1315 1316 /* Install our software interrupt handlers */ 1317 register_swi(SWI_CAMNET, swi_camnet); 1318 register_swi(SWI_CAMBIO, swi_cambio); 1319} 1320 1321static cam_status 1322xptregister(struct cam_periph *periph, void *arg) 1323{ 1324 if (periph == NULL) { 1325 printf("xptregister: periph was NULL!!\n"); 1326 return(CAM_REQ_CMP_ERR); 1327 } 1328 1329 periph->softc = NULL; 1330 1331 xpt_periph = periph; 1332 1333 return(CAM_REQ_CMP); 1334} 1335 1336int32_t 1337xpt_add_periph(struct cam_periph *periph) 1338{ 1339 struct cam_ed *device; 1340 int32_t status; 1341 struct periph_list *periph_head; 1342 1343 device = periph->path->device; 1344 1345 periph_head = &device->periphs; 1346 1347 status = CAM_REQ_CMP; 1348 1349 if (device != NULL) { 1350 int s; 1351 1352 /* 1353 * Make room for this peripheral 1354 * so it will fit in the queue 1355 * when it's scheduled to run 1356 */ 1357 s = splsoftcam(); 1358 status = camq_resize(&device->drvq, 1359 device->drvq.array_size + 1); 1360 1361 device->generation++; 1362 1363 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1364 1365 splx(s); 1366 } 1367 1368 xsoftc.generation++; 1369 1370 return (status); 1371} 1372 1373void 1374xpt_remove_periph(struct cam_periph *periph) 1375{ 1376 struct cam_ed *device; 1377 1378 device = periph->path->device; 1379 1380 if (device != NULL) { 1381 int s; 1382 struct periph_list *periph_head; 1383 1384 periph_head = &device->periphs; 1385 1386 /* Release the slot for this peripheral */ 1387 s = splsoftcam(); 1388 camq_resize(&device->drvq, device->drvq.array_size - 1); 1389 1390 device->generation++; 1391 1392 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1393 1394 splx(s); 1395 } 1396 1397 xsoftc.generation++; 1398 1399} 1400 1401void 1402xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1403{ 1404 int s; 1405 u_int mb; 1406 struct cam_path *path; 1407 struct ccb_trans_settings cts; 1408 1409 path = periph->path; 1410 /* 1411 * To ensure that this is printed in one piece, 1412 * mask out CAM interrupts. 1413 */ 1414 s = splsoftcam(); 1415 printf("%s%d at %s%d bus %d target %d lun %d\n", 1416 periph->periph_name, periph->unit_number, 1417 path->bus->sim->sim_name, 1418 path->bus->sim->unit_number, 1419 path->bus->sim->bus_id, 1420 path->target->target_id, 1421 path->device->lun_id); 1422 printf("%s%d: ", periph->periph_name, periph->unit_number); 1423 scsi_print_inquiry(&path->device->inq_data); 1424 if ((bootverbose) 1425 && (path->device->serial_num_len > 0)) { 1426 /* Don't wrap the screen - print only the first 60 chars */ 1427 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1428 periph->unit_number, path->device->serial_num); 1429 } 1430 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1431 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1432 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1433 xpt_action((union ccb*)&cts); 1434 if (cts.ccb_h.status == CAM_REQ_CMP) { 1435 u_int speed; 1436 u_int freq; 1437 1438 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1439 && cts.sync_offset != 0) { 1440 freq = scsi_calc_syncsrate(cts.sync_period); 1441 speed = freq; 1442 } else { 1443 freq = 0; 1444 speed = path->bus->sim->base_transfer_speed; 1445 } 1446 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1447 speed *= (0x01 << cts.bus_width); 1448 mb = speed / 1000; 1449 if (mb > 0) 1450 printf("%s%d: %d.%03dMB/s transfers", 1451 periph->periph_name, periph->unit_number, 1452 mb, speed % 1000); 1453 else 1454 printf("%s%d: %dKB/s transfers", periph->periph_name, 1455 periph->unit_number, (speed % 1000) * 1000); 1456 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1457 && cts.sync_offset != 0) { 1458 printf(" (%d.%03dMHz, offset %d", freq / 1000, 1459 freq % 1000, cts.sync_offset); 1460 } 1461 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1462 && cts.bus_width > 0) { 1463 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1464 && cts.sync_offset != 0) { 1465 printf(", "); 1466 } else { 1467 printf(" ("); 1468 } 1469 printf("%dbit)", 8 * (0x01 << cts.bus_width)); 1470 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1471 && cts.sync_offset != 0) { 1472 printf(")"); 1473 } 1474 1475 if (path->device->inq_flags & SID_CmdQue 1476 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1477 printf(", Tagged Queueing Enabled"); 1478 } 1479 1480 printf("\n"); 1481 } else if (path->device->inq_flags & SID_CmdQue 1482 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1483 printf("%s%d: Tagged Queueing Enabled\n", 1484 periph->periph_name, periph->unit_number); 1485 } 1486 1487 /* 1488 * We only want to print the caller's announce string if they've 1489 * passed one in.. 1490 */ 1491 if (announce_string != NULL) 1492 printf("%s%d: %s\n", periph->periph_name, 1493 periph->unit_number, announce_string); 1494 splx(s); 1495} 1496 1497 1498static dev_match_ret 1499xptbusmatch(struct dev_match_pattern *patterns, int num_patterns, 1500 struct cam_eb *bus) 1501{ 1502 dev_match_ret retval; 1503 int i; 1504 1505 retval = DM_RET_NONE; 1506 1507 /* 1508 * If we aren't given something to match against, that's an error. 1509 */ 1510 if (bus == NULL) 1511 return(DM_RET_ERROR); 1512 1513 /* 1514 * If there are no match entries, then this bus matches no 1515 * matter what. 1516 */ 1517 if ((patterns == NULL) || (num_patterns == 0)) 1518 return(DM_RET_DESCEND | DM_RET_COPY); 1519 1520 for (i = 0; i < num_patterns; i++) { 1521 struct bus_match_pattern *cur_pattern; 1522 1523 /* 1524 * If the pattern in question isn't for a bus node, we 1525 * aren't interested. However, we do indicate to the 1526 * calling routine that we should continue descending the 1527 * tree, since the user wants to match against lower-level 1528 * EDT elements. 1529 */ 1530 if (patterns[i].type != DEV_MATCH_BUS) { 1531 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1532 retval |= DM_RET_DESCEND; 1533 continue; 1534 } 1535 1536 cur_pattern = &patterns[i].pattern.bus_pattern; 1537 1538 /* 1539 * If they want to match any bus node, we give them any 1540 * device node. 1541 */ 1542 if (cur_pattern->flags == BUS_MATCH_ANY) { 1543 /* set the copy flag */ 1544 retval |= DM_RET_COPY; 1545 1546 /* 1547 * If we've already decided on an action, go ahead 1548 * and return. 1549 */ 1550 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1551 return(retval); 1552 } 1553 1554 /* 1555 * Not sure why someone would do this... 1556 */ 1557 if (cur_pattern->flags == BUS_MATCH_NONE) 1558 continue; 1559 1560 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1561 && (cur_pattern->path_id != bus->path_id)) 1562 continue; 1563 1564 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1565 && (cur_pattern->bus_id != bus->sim->bus_id)) 1566 continue; 1567 1568 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1569 && (cur_pattern->unit_number != bus->sim->unit_number)) 1570 continue; 1571 1572 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1573 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1574 DEV_IDLEN) != 0)) 1575 continue; 1576 1577 /* 1578 * If we get to this point, the user definitely wants 1579 * information on this bus. So tell the caller to copy the 1580 * data out. 1581 */ 1582 retval |= DM_RET_COPY; 1583 1584 /* 1585 * If the return action has been set to descend, then we 1586 * know that we've already seen a non-bus matching 1587 * expression, therefore we need to further descend the tree. 1588 * This won't change by continuing around the loop, so we 1589 * go ahead and return. If we haven't seen a non-bus 1590 * matching expression, we keep going around the loop until 1591 * we exhaust the matching expressions. We'll set the stop 1592 * flag once we fall out of the loop. 1593 */ 1594 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1595 return(retval); 1596 } 1597 1598 /* 1599 * If the return action hasn't been set to descend yet, that means 1600 * we haven't seen anything other than bus matching patterns. So 1601 * tell the caller to stop descending the tree -- the user doesn't 1602 * want to match against lower level tree elements. 1603 */ 1604 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1605 retval |= DM_RET_STOP; 1606 1607 return(retval); 1608} 1609 1610static dev_match_ret 1611xptdevicematch(struct dev_match_pattern *patterns, int num_patterns, 1612 struct cam_ed *device) 1613{ 1614 dev_match_ret retval; 1615 int i; 1616 1617 retval = DM_RET_NONE; 1618 1619 /* 1620 * If we aren't given something to match against, that's an error. 1621 */ 1622 if (device == NULL) 1623 return(DM_RET_ERROR); 1624 1625 /* 1626 * If there are no match entries, then this device matches no 1627 * matter what. 1628 */ 1629 if ((patterns == NULL) || (patterns == 0)) 1630 return(DM_RET_DESCEND | DM_RET_COPY); 1631 1632 for (i = 0; i < num_patterns; i++) { 1633 struct device_match_pattern *cur_pattern; 1634 1635 /* 1636 * If the pattern in question isn't for a device node, we 1637 * aren't interested. 1638 */ 1639 if (patterns[i].type != DEV_MATCH_DEVICE) { 1640 if ((patterns[i].type == DEV_MATCH_PERIPH) 1641 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1642 retval |= DM_RET_DESCEND; 1643 continue; 1644 } 1645 1646 cur_pattern = &patterns[i].pattern.device_pattern; 1647 1648 /* 1649 * If they want to match any device node, we give them any 1650 * device node. 1651 */ 1652 if (cur_pattern->flags == DEV_MATCH_ANY) { 1653 /* set the copy flag */ 1654 retval |= DM_RET_COPY; 1655 1656 1657 /* 1658 * If we've already decided on an action, go ahead 1659 * and return. 1660 */ 1661 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1662 return(retval); 1663 } 1664 1665 /* 1666 * Not sure why someone would do this... 1667 */ 1668 if (cur_pattern->flags == DEV_MATCH_NONE) 1669 continue; 1670 1671 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1672 && (cur_pattern->path_id != device->target->bus->path_id)) 1673 continue; 1674 1675 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1676 && (cur_pattern->target_id != device->target->target_id)) 1677 continue; 1678 1679 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1680 && (cur_pattern->target_lun != device->lun_id)) 1681 continue; 1682 1683 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1684 && (cam_quirkmatch((caddr_t)&device->inq_data, 1685 (caddr_t)&cur_pattern->inq_pat, 1686 1, sizeof(cur_pattern->inq_pat), 1687 scsi_static_inquiry_match) == NULL)) 1688 continue; 1689 1690 /* 1691 * If we get to this point, the user definitely wants 1692 * information on this device. So tell the caller to copy 1693 * the data out. 1694 */ 1695 retval |= DM_RET_COPY; 1696 1697 /* 1698 * If the return action has been set to descend, then we 1699 * know that we've already seen a peripheral matching 1700 * expression, therefore we need to further descend the tree. 1701 * This won't change by continuing around the loop, so we 1702 * go ahead and return. If we haven't seen a peripheral 1703 * matching expression, we keep going around the loop until 1704 * we exhaust the matching expressions. We'll set the stop 1705 * flag once we fall out of the loop. 1706 */ 1707 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1708 return(retval); 1709 } 1710 1711 /* 1712 * If the return action hasn't been set to descend yet, that means 1713 * we haven't seen any peripheral matching patterns. So tell the 1714 * caller to stop descending the tree -- the user doesn't want to 1715 * match against lower level tree elements. 1716 */ 1717 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1718 retval |= DM_RET_STOP; 1719 1720 return(retval); 1721} 1722 1723/* 1724 * Match a single peripheral against any number of match patterns. 1725 */ 1726static dev_match_ret 1727xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns, 1728 struct cam_periph *periph) 1729{ 1730 dev_match_ret retval; 1731 int i; 1732 1733 /* 1734 * If we aren't given something to match against, that's an error. 1735 */ 1736 if (periph == NULL) 1737 return(DM_RET_ERROR); 1738 1739 /* 1740 * If there are no match entries, then this peripheral matches no 1741 * matter what. 1742 */ 1743 if ((patterns == NULL) || (num_patterns == 0)) 1744 return(DM_RET_STOP | DM_RET_COPY); 1745 1746 /* 1747 * There aren't any nodes below a peripheral node, so there's no 1748 * reason to descend the tree any further. 1749 */ 1750 retval = DM_RET_STOP; 1751 1752 for (i = 0; i < num_patterns; i++) { 1753 struct periph_match_pattern *cur_pattern; 1754 1755 /* 1756 * If the pattern in question isn't for a peripheral, we 1757 * aren't interested. 1758 */ 1759 if (patterns[i].type != DEV_MATCH_PERIPH) 1760 continue; 1761 1762 cur_pattern = &patterns[i].pattern.periph_pattern; 1763 1764 /* 1765 * If they want to match on anything, then we will do so. 1766 */ 1767 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1768 /* set the copy flag */ 1769 retval |= DM_RET_COPY; 1770 1771 /* 1772 * We've already set the return action to stop, 1773 * since there are no nodes below peripherals in 1774 * the tree. 1775 */ 1776 return(retval); 1777 } 1778 1779 /* 1780 * Not sure why someone would do this... 1781 */ 1782 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1783 continue; 1784 1785 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1786 && (cur_pattern->path_id != periph->path->bus->path_id)) 1787 continue; 1788 1789 /* 1790 * For the target and lun id's, we have to make sure the 1791 * target and lun pointers aren't NULL. The xpt peripheral 1792 * has a wildcard target and device. 1793 */ 1794 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1795 && ((periph->path->target == NULL) 1796 ||(cur_pattern->target_id != periph->path->target->target_id))) 1797 continue; 1798 1799 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1800 && ((periph->path->device == NULL) 1801 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1802 continue; 1803 1804 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1805 && (cur_pattern->unit_number != periph->unit_number)) 1806 continue; 1807 1808 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1809 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1810 DEV_IDLEN) != 0)) 1811 continue; 1812 1813 /* 1814 * If we get to this point, the user definitely wants 1815 * information on this peripheral. So tell the caller to 1816 * copy the data out. 1817 */ 1818 retval |= DM_RET_COPY; 1819 1820 /* 1821 * The return action has already been set to stop, since 1822 * peripherals don't have any nodes below them in the EDT. 1823 */ 1824 return(retval); 1825 } 1826 1827 /* 1828 * If we get to this point, the peripheral that was passed in 1829 * doesn't match any of the patterns. 1830 */ 1831 return(retval); 1832} 1833 1834static int 1835xptedtbusfunc(struct cam_eb *bus, void *arg) 1836{ 1837 struct ccb_dev_match *cdm; 1838 dev_match_ret retval; 1839 1840 cdm = (struct ccb_dev_match *)arg; 1841 1842 /* 1843 * If our position is for something deeper in the tree, that means 1844 * that we've already seen this node. So, we keep going down. 1845 */ 1846 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1847 && (cdm->pos.cookie.bus == bus) 1848 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1849 && (cdm->pos.cookie.target != NULL)) 1850 retval = DM_RET_DESCEND; 1851 else 1852 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1853 1854 /* 1855 * If we got an error, bail out of the search. 1856 */ 1857 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1858 cdm->status = CAM_DEV_MATCH_ERROR; 1859 return(0); 1860 } 1861 1862 /* 1863 * If the copy flag is set, copy this bus out. 1864 */ 1865 if (retval & DM_RET_COPY) { 1866 int spaceleft, j; 1867 1868 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1869 sizeof(struct dev_match_result)); 1870 1871 /* 1872 * If we don't have enough space to put in another 1873 * match result, save our position and tell the 1874 * user there are more devices to check. 1875 */ 1876 if (spaceleft < sizeof(struct dev_match_result)) { 1877 bzero(&cdm->pos, sizeof(cdm->pos)); 1878 cdm->pos.position_type = 1879 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1880 1881 cdm->pos.cookie.bus = bus; 1882 cdm->pos.generations[CAM_BUS_GENERATION]= 1883 bus_generation; 1884 cdm->status = CAM_DEV_MATCH_MORE; 1885 return(0); 1886 } 1887 j = cdm->num_matches; 1888 cdm->num_matches++; 1889 cdm->matches[j].type = DEV_MATCH_BUS; 1890 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1891 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1892 cdm->matches[j].result.bus_result.unit_number = 1893 bus->sim->unit_number; 1894 strncpy(cdm->matches[j].result.bus_result.dev_name, 1895 bus->sim->sim_name, DEV_IDLEN); 1896 } 1897 1898 /* 1899 * If the user is only interested in busses, there's no 1900 * reason to descend to the next level in the tree. 1901 */ 1902 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1903 return(1); 1904 1905 /* 1906 * If there is a target generation recorded, check it to 1907 * make sure the target list hasn't changed. 1908 */ 1909 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1910 && (bus == cdm->pos.cookie.bus) 1911 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1912 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1913 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1914 bus->generation)) { 1915 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1916 return(0); 1917 } 1918 1919 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1920 && (cdm->pos.cookie.bus == bus) 1921 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1922 && (cdm->pos.cookie.target != NULL)) 1923 return(xpttargettraverse(bus, 1924 (struct cam_et *)cdm->pos.cookie.target, 1925 xptedttargetfunc, arg)); 1926 else 1927 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1928} 1929 1930static int 1931xptedttargetfunc(struct cam_et *target, void *arg) 1932{ 1933 struct ccb_dev_match *cdm; 1934 1935 cdm = (struct ccb_dev_match *)arg; 1936 1937 /* 1938 * If there is a device list generation recorded, check it to 1939 * make sure the device list hasn't changed. 1940 */ 1941 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1942 && (cdm->pos.cookie.bus == target->bus) 1943 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1944 && (cdm->pos.cookie.target == target) 1945 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1946 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1947 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1948 target->generation)) { 1949 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1950 return(0); 1951 } 1952 1953 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1954 && (cdm->pos.cookie.bus == target->bus) 1955 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1956 && (cdm->pos.cookie.target == target) 1957 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1958 && (cdm->pos.cookie.device != NULL)) 1959 return(xptdevicetraverse(target, 1960 (struct cam_ed *)cdm->pos.cookie.device, 1961 xptedtdevicefunc, arg)); 1962 else 1963 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 1964} 1965 1966static int 1967xptedtdevicefunc(struct cam_ed *device, void *arg) 1968{ 1969 1970 struct ccb_dev_match *cdm; 1971 dev_match_ret retval; 1972 1973 cdm = (struct ccb_dev_match *)arg; 1974 1975 /* 1976 * If our position is for something deeper in the tree, that means 1977 * that we've already seen this node. So, we keep going down. 1978 */ 1979 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1980 && (cdm->pos.cookie.device == device) 1981 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 1982 && (cdm->pos.cookie.periph != NULL)) 1983 retval = DM_RET_DESCEND; 1984 else 1985 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 1986 device); 1987 1988 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1989 cdm->status = CAM_DEV_MATCH_ERROR; 1990 return(0); 1991 } 1992 1993 /* 1994 * If the copy flag is set, copy this device out. 1995 */ 1996 if (retval & DM_RET_COPY) { 1997 int spaceleft, j; 1998 1999 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2000 sizeof(struct dev_match_result)); 2001 2002 /* 2003 * If we don't have enough space to put in another 2004 * match result, save our position and tell the 2005 * user there are more devices to check. 2006 */ 2007 if (spaceleft < sizeof(struct dev_match_result)) { 2008 bzero(&cdm->pos, sizeof(cdm->pos)); 2009 cdm->pos.position_type = 2010 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2011 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2012 2013 cdm->pos.cookie.bus = device->target->bus; 2014 cdm->pos.generations[CAM_BUS_GENERATION]= 2015 bus_generation; 2016 cdm->pos.cookie.target = device->target; 2017 cdm->pos.generations[CAM_TARGET_GENERATION] = 2018 device->target->bus->generation; 2019 cdm->pos.cookie.device = device; 2020 cdm->pos.generations[CAM_DEV_GENERATION] = 2021 device->target->generation; 2022 cdm->status = CAM_DEV_MATCH_MORE; 2023 return(0); 2024 } 2025 j = cdm->num_matches; 2026 cdm->num_matches++; 2027 cdm->matches[j].type = DEV_MATCH_DEVICE; 2028 cdm->matches[j].result.device_result.path_id = 2029 device->target->bus->path_id; 2030 cdm->matches[j].result.device_result.target_id = 2031 device->target->target_id; 2032 cdm->matches[j].result.device_result.target_lun = 2033 device->lun_id; 2034 bcopy(&device->inq_data, 2035 &cdm->matches[j].result.device_result.inq_data, 2036 sizeof(struct scsi_inquiry_data)); 2037 } 2038 2039 /* 2040 * If the user isn't interested in peripherals, don't descend 2041 * the tree any further. 2042 */ 2043 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2044 return(1); 2045 2046 /* 2047 * If there is a peripheral list generation recorded, make sure 2048 * it hasn't changed. 2049 */ 2050 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2051 && (device->target->bus == cdm->pos.cookie.bus) 2052 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2053 && (device->target == cdm->pos.cookie.target) 2054 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2055 && (device == cdm->pos.cookie.device) 2056 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2057 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2058 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2059 device->generation)){ 2060 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2061 return(0); 2062 } 2063 2064 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2065 && (cdm->pos.cookie.bus == device->target->bus) 2066 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2067 && (cdm->pos.cookie.target == device->target) 2068 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2069 && (cdm->pos.cookie.device == device) 2070 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2071 && (cdm->pos.cookie.periph != NULL)) 2072 return(xptperiphtraverse(device, 2073 (struct cam_periph *)cdm->pos.cookie.periph, 2074 xptedtperiphfunc, arg)); 2075 else 2076 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2077} 2078 2079static int 2080xptedtperiphfunc(struct cam_periph *periph, void *arg) 2081{ 2082 struct ccb_dev_match *cdm; 2083 dev_match_ret retval; 2084 2085 cdm = (struct ccb_dev_match *)arg; 2086 2087 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2088 2089 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2090 cdm->status = CAM_DEV_MATCH_ERROR; 2091 return(0); 2092 } 2093 2094 /* 2095 * If the copy flag is set, copy this peripheral out. 2096 */ 2097 if (retval & DM_RET_COPY) { 2098 int spaceleft, j; 2099 2100 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2101 sizeof(struct dev_match_result)); 2102 2103 /* 2104 * If we don't have enough space to put in another 2105 * match result, save our position and tell the 2106 * user there are more devices to check. 2107 */ 2108 if (spaceleft < sizeof(struct dev_match_result)) { 2109 bzero(&cdm->pos, sizeof(cdm->pos)); 2110 cdm->pos.position_type = 2111 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2112 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2113 CAM_DEV_POS_PERIPH; 2114 2115 cdm->pos.cookie.bus = periph->path->bus; 2116 cdm->pos.generations[CAM_BUS_GENERATION]= 2117 bus_generation; 2118 cdm->pos.cookie.target = periph->path->target; 2119 cdm->pos.generations[CAM_TARGET_GENERATION] = 2120 periph->path->bus->generation; 2121 cdm->pos.cookie.device = periph->path->device; 2122 cdm->pos.generations[CAM_DEV_GENERATION] = 2123 periph->path->target->generation; 2124 cdm->pos.cookie.periph = periph; 2125 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2126 periph->path->device->generation; 2127 cdm->status = CAM_DEV_MATCH_MORE; 2128 return(0); 2129 } 2130 2131 j = cdm->num_matches; 2132 cdm->num_matches++; 2133 cdm->matches[j].type = DEV_MATCH_PERIPH; 2134 cdm->matches[j].result.periph_result.path_id = 2135 periph->path->bus->path_id; 2136 cdm->matches[j].result.periph_result.target_id = 2137 periph->path->target->target_id; 2138 cdm->matches[j].result.periph_result.target_lun = 2139 periph->path->device->lun_id; 2140 cdm->matches[j].result.periph_result.unit_number = 2141 periph->unit_number; 2142 strncpy(cdm->matches[j].result.periph_result.periph_name, 2143 periph->periph_name, DEV_IDLEN); 2144 } 2145 2146 return(1); 2147} 2148 2149static int 2150xptedtmatch(struct ccb_dev_match *cdm) 2151{ 2152 int ret; 2153 2154 cdm->num_matches = 0; 2155 2156 /* 2157 * Check the bus list generation. If it has changed, the user 2158 * needs to reset everything and start over. 2159 */ 2160 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2161 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2162 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2163 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2164 return(0); 2165 } 2166 2167 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2168 && (cdm->pos.cookie.bus != NULL)) 2169 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2170 xptedtbusfunc, cdm); 2171 else 2172 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2173 2174 /* 2175 * If we get back 0, that means that we had to stop before fully 2176 * traversing the EDT. It also means that one of the subroutines 2177 * has set the status field to the proper value. If we get back 1, 2178 * we've fully traversed the EDT and copied out any matching entries. 2179 */ 2180 if (ret == 1) 2181 cdm->status = CAM_DEV_MATCH_LAST; 2182 2183 return(ret); 2184} 2185 2186static int 2187xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2188{ 2189 struct ccb_dev_match *cdm; 2190 2191 cdm = (struct ccb_dev_match *)arg; 2192 2193 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2194 && (cdm->pos.cookie.pdrv == pdrv) 2195 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2196 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2197 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2198 (*pdrv)->generation)) { 2199 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2200 return(0); 2201 } 2202 2203 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2204 && (cdm->pos.cookie.pdrv == pdrv) 2205 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2206 && (cdm->pos.cookie.periph != NULL)) 2207 return(xptpdperiphtraverse(pdrv, 2208 (struct cam_periph *)cdm->pos.cookie.periph, 2209 xptplistperiphfunc, arg)); 2210 else 2211 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2212} 2213 2214static int 2215xptplistperiphfunc(struct cam_periph *periph, void *arg) 2216{ 2217 struct ccb_dev_match *cdm; 2218 dev_match_ret retval; 2219 2220 cdm = (struct ccb_dev_match *)arg; 2221 2222 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2223 2224 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2225 cdm->status = CAM_DEV_MATCH_ERROR; 2226 return(0); 2227 } 2228 2229 /* 2230 * If the copy flag is set, copy this peripheral out. 2231 */ 2232 if (retval & DM_RET_COPY) { 2233 int spaceleft, j; 2234 2235 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2236 sizeof(struct dev_match_result)); 2237 2238 /* 2239 * If we don't have enough space to put in another 2240 * match result, save our position and tell the 2241 * user there are more devices to check. 2242 */ 2243 if (spaceleft < sizeof(struct dev_match_result)) { 2244 struct periph_driver **pdrv; 2245 2246 pdrv = NULL; 2247 bzero(&cdm->pos, sizeof(cdm->pos)); 2248 cdm->pos.position_type = 2249 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2250 CAM_DEV_POS_PERIPH; 2251 2252 /* 2253 * This may look a bit non-sensical, but it is 2254 * actually quite logical. There are very few 2255 * peripheral drivers, and bloating every peripheral 2256 * structure with a pointer back to its parent 2257 * peripheral driver linker set entry would cost 2258 * more in the long run than doing this quick lookup. 2259 */ 2260 for (pdrv = 2261 (struct periph_driver **)periphdriver_set.ls_items; 2262 *pdrv != NULL; pdrv++) { 2263 if (strcmp((*pdrv)->driver_name, 2264 periph->periph_name) == 0) 2265 break; 2266 } 2267 2268 if (pdrv == NULL) { 2269 cdm->status = CAM_DEV_MATCH_ERROR; 2270 return(0); 2271 } 2272 2273 cdm->pos.cookie.pdrv = pdrv; 2274 /* 2275 * The periph generation slot does double duty, as 2276 * does the periph pointer slot. They are used for 2277 * both edt and pdrv lookups and positioning. 2278 */ 2279 cdm->pos.cookie.periph = periph; 2280 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2281 (*pdrv)->generation; 2282 cdm->status = CAM_DEV_MATCH_MORE; 2283 return(0); 2284 } 2285 2286 j = cdm->num_matches; 2287 cdm->num_matches++; 2288 cdm->matches[j].type = DEV_MATCH_PERIPH; 2289 cdm->matches[j].result.periph_result.path_id = 2290 periph->path->bus->path_id; 2291 2292 /* 2293 * The transport layer peripheral doesn't have a target or 2294 * lun. 2295 */ 2296 if (periph->path->target) 2297 cdm->matches[j].result.periph_result.target_id = 2298 periph->path->target->target_id; 2299 else 2300 cdm->matches[j].result.periph_result.target_id = -1; 2301 2302 if (periph->path->device) 2303 cdm->matches[j].result.periph_result.target_lun = 2304 periph->path->device->lun_id; 2305 else 2306 cdm->matches[j].result.periph_result.target_lun = -1; 2307 2308 cdm->matches[j].result.periph_result.unit_number = 2309 periph->unit_number; 2310 strncpy(cdm->matches[j].result.periph_result.periph_name, 2311 periph->periph_name, DEV_IDLEN); 2312 } 2313 2314 return(1); 2315} 2316 2317static int 2318xptperiphlistmatch(struct ccb_dev_match *cdm) 2319{ 2320 int ret; 2321 2322 cdm->num_matches = 0; 2323 2324 /* 2325 * At this point in the edt traversal function, we check the bus 2326 * list generation to make sure that no busses have been added or 2327 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2328 * For the peripheral driver list traversal function, however, we 2329 * don't have to worry about new peripheral driver types coming or 2330 * going; they're in a linker set, and therefore can't change 2331 * without a recompile. 2332 */ 2333 2334 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2335 && (cdm->pos.cookie.pdrv != NULL)) 2336 ret = xptpdrvtraverse( 2337 (struct periph_driver **)cdm->pos.cookie.pdrv, 2338 xptplistpdrvfunc, cdm); 2339 else 2340 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2341 2342 /* 2343 * If we get back 0, that means that we had to stop before fully 2344 * traversing the peripheral driver tree. It also means that one of 2345 * the subroutines has set the status field to the proper value. If 2346 * we get back 1, we've fully traversed the EDT and copied out any 2347 * matching entries. 2348 */ 2349 if (ret == 1) 2350 cdm->status = CAM_DEV_MATCH_LAST; 2351 2352 return(ret); 2353} 2354 2355static int 2356xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2357{ 2358 struct cam_eb *bus, *next_bus; 2359 int retval; 2360 2361 retval = 1; 2362 2363 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2364 bus != NULL; 2365 bus = next_bus) { 2366 next_bus = TAILQ_NEXT(bus, links); 2367 2368 retval = tr_func(bus, arg); 2369 if (retval == 0) 2370 return(retval); 2371 } 2372 2373 return(retval); 2374} 2375 2376static int 2377xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2378 xpt_targetfunc_t *tr_func, void *arg) 2379{ 2380 struct cam_et *target, *next_target; 2381 int retval; 2382 2383 retval = 1; 2384 for (target = (start_target ? start_target : 2385 TAILQ_FIRST(&bus->et_entries)); 2386 target != NULL; target = next_target) { 2387 2388 next_target = TAILQ_NEXT(target, links); 2389 2390 retval = tr_func(target, arg); 2391 2392 if (retval == 0) 2393 return(retval); 2394 } 2395 2396 return(retval); 2397} 2398 2399static int 2400xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2401 xpt_devicefunc_t *tr_func, void *arg) 2402{ 2403 struct cam_ed *device, *next_device; 2404 int retval; 2405 2406 retval = 1; 2407 for (device = (start_device ? start_device : 2408 TAILQ_FIRST(&target->ed_entries)); 2409 device != NULL; 2410 device = next_device) { 2411 2412 next_device = TAILQ_NEXT(device, links); 2413 2414 retval = tr_func(device, arg); 2415 2416 if (retval == 0) 2417 return(retval); 2418 } 2419 2420 return(retval); 2421} 2422 2423static int 2424xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2425 xpt_periphfunc_t *tr_func, void *arg) 2426{ 2427 struct cam_periph *periph, *next_periph; 2428 int retval; 2429 2430 retval = 1; 2431 2432 for (periph = (start_periph ? start_periph : 2433 SLIST_FIRST(&device->periphs)); 2434 periph != NULL; 2435 periph = next_periph) { 2436 2437 next_periph = SLIST_NEXT(periph, periph_links); 2438 2439 retval = tr_func(periph, arg); 2440 if (retval == 0) 2441 return(retval); 2442 } 2443 2444 return(retval); 2445} 2446 2447static int 2448xptpdrvtraverse(struct periph_driver **start_pdrv, 2449 xpt_pdrvfunc_t *tr_func, void *arg) 2450{ 2451 struct periph_driver **pdrv; 2452 int retval; 2453 2454 retval = 1; 2455 2456 /* 2457 * We don't traverse the peripheral driver list like we do the 2458 * other lists, because it is a linker set, and therefore cannot be 2459 * changed during runtime. If the peripheral driver list is ever 2460 * re-done to be something other than a linker set (i.e. it can 2461 * change while the system is running), the list traversal should 2462 * be modified to work like the other traversal functions. 2463 */ 2464 for (pdrv = (start_pdrv ? start_pdrv : 2465 (struct periph_driver **)periphdriver_set.ls_items); 2466 *pdrv != NULL; pdrv++) { 2467 retval = tr_func(pdrv, arg); 2468 2469 if (retval == 0) 2470 return(retval); 2471 } 2472 2473 return(retval); 2474} 2475 2476static int 2477xptpdperiphtraverse(struct periph_driver **pdrv, 2478 struct cam_periph *start_periph, 2479 xpt_periphfunc_t *tr_func, void *arg) 2480{ 2481 struct cam_periph *periph, *next_periph; 2482 int retval; 2483 2484 retval = 1; 2485 2486 for (periph = (start_periph ? start_periph : 2487 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2488 periph = next_periph) { 2489 2490 next_periph = TAILQ_NEXT(periph, unit_links); 2491 2492 retval = tr_func(periph, arg); 2493 if (retval == 0) 2494 return(retval); 2495 } 2496 return(retval); 2497} 2498 2499static int 2500xptdefbusfunc(struct cam_eb *bus, void *arg) 2501{ 2502 struct xpt_traverse_config *tr_config; 2503 2504 tr_config = (struct xpt_traverse_config *)arg; 2505 2506 if (tr_config->depth == XPT_DEPTH_BUS) { 2507 xpt_busfunc_t *tr_func; 2508 2509 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2510 2511 return(tr_func(bus, tr_config->tr_arg)); 2512 } else 2513 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2514} 2515 2516static int 2517xptdeftargetfunc(struct cam_et *target, void *arg) 2518{ 2519 struct xpt_traverse_config *tr_config; 2520 2521 tr_config = (struct xpt_traverse_config *)arg; 2522 2523 if (tr_config->depth == XPT_DEPTH_TARGET) { 2524 xpt_targetfunc_t *tr_func; 2525 2526 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2527 2528 return(tr_func(target, tr_config->tr_arg)); 2529 } else 2530 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2531} 2532 2533static int 2534xptdefdevicefunc(struct cam_ed *device, void *arg) 2535{ 2536 struct xpt_traverse_config *tr_config; 2537 2538 tr_config = (struct xpt_traverse_config *)arg; 2539 2540 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2541 xpt_devicefunc_t *tr_func; 2542 2543 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2544 2545 return(tr_func(device, tr_config->tr_arg)); 2546 } else 2547 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2548} 2549 2550static int 2551xptdefperiphfunc(struct cam_periph *periph, void *arg) 2552{ 2553 struct xpt_traverse_config *tr_config; 2554 xpt_periphfunc_t *tr_func; 2555 2556 tr_config = (struct xpt_traverse_config *)arg; 2557 2558 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2559 2560 /* 2561 * Unlike the other default functions, we don't check for depth 2562 * here. The peripheral driver level is the last level in the EDT, 2563 * so if we're here, we should execute the function in question. 2564 */ 2565 return(tr_func(periph, tr_config->tr_arg)); 2566} 2567 2568/* 2569 * Execute the given function for every bus in the EDT. 2570 */ 2571static int 2572xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2573{ 2574 struct xpt_traverse_config tr_config; 2575 2576 tr_config.depth = XPT_DEPTH_BUS; 2577 tr_config.tr_func = tr_func; 2578 tr_config.tr_arg = arg; 2579 2580 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2581} 2582 2583#ifdef notusedyet 2584/* 2585 * Execute the given function for every target in the EDT. 2586 */ 2587static int 2588xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2589{ 2590 struct xpt_traverse_config tr_config; 2591 2592 tr_config.depth = XPT_DEPTH_TARGET; 2593 tr_config.tr_func = tr_func; 2594 tr_config.tr_arg = arg; 2595 2596 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2597} 2598#endif /* notusedyet */ 2599 2600/* 2601 * Execute the given function for every device in the EDT. 2602 */ 2603static int 2604xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2605{ 2606 struct xpt_traverse_config tr_config; 2607 2608 tr_config.depth = XPT_DEPTH_DEVICE; 2609 tr_config.tr_func = tr_func; 2610 tr_config.tr_arg = arg; 2611 2612 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2613} 2614 2615#ifdef notusedyet 2616/* 2617 * Execute the given function for every peripheral in the EDT. 2618 */ 2619static int 2620xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2621{ 2622 struct xpt_traverse_config tr_config; 2623 2624 tr_config.depth = XPT_DEPTH_PERIPH; 2625 tr_config.tr_func = tr_func; 2626 tr_config.tr_arg = arg; 2627 2628 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2629} 2630#endif /* notusedyet */ 2631 2632static int 2633xptsetasyncfunc(struct cam_ed *device, void *arg) 2634{ 2635 struct cam_path path; 2636 struct ccb_getdev cgd; 2637 struct async_node *cur_entry; 2638 2639 cur_entry = (struct async_node *)arg; 2640 2641 /* 2642 * Don't report unconfigured devices (Wildcard devs, 2643 * devices only for target mode, device instances 2644 * that have been invalidated but are waiting for 2645 * their last reference count to be released). 2646 */ 2647 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2648 return (1); 2649 2650 xpt_compile_path(&path, 2651 NULL, 2652 device->target->bus->path_id, 2653 device->target->target_id, 2654 device->lun_id); 2655 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2656 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2657 xpt_action((union ccb *)&cgd); 2658 cur_entry->callback(cur_entry->callback_arg, 2659 AC_FOUND_DEVICE, 2660 &path, &cgd); 2661 xpt_release_path(&path); 2662 2663 return(1); 2664} 2665 2666static int 2667xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2668{ 2669 struct cam_path path; 2670 struct ccb_pathinq cpi; 2671 struct async_node *cur_entry; 2672 2673 cur_entry = (struct async_node *)arg; 2674 2675 xpt_compile_path(&path, /*periph*/NULL, 2676 bus->sim->path_id, 2677 CAM_TARGET_WILDCARD, 2678 CAM_LUN_WILDCARD); 2679 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2680 cpi.ccb_h.func_code = XPT_PATH_INQ; 2681 xpt_action((union ccb *)&cpi); 2682 cur_entry->callback(cur_entry->callback_arg, 2683 AC_PATH_REGISTERED, 2684 &path, &cpi); 2685 xpt_release_path(&path); 2686 2687 return(1); 2688} 2689 2690void 2691xpt_action(union ccb *start_ccb) 2692{ 2693 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2694 2695 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2696 2697 switch (start_ccb->ccb_h.func_code) { 2698 case XPT_SCSI_IO: 2699 { 2700#ifdef CAMDEBUG 2701 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2702 struct cam_path *path; 2703 2704 path = start_ccb->ccb_h.path; 2705#endif 2706 2707 /* 2708 * For the sake of compatibility with SCSI-1 2709 * devices that may not understand the identify 2710 * message, we include lun information in the 2711 * second byte of all commands. SCSI-1 specifies 2712 * that luns are a 3 bit value and reserves only 3 2713 * bits for lun information in the CDB. Later 2714 * revisions of the SCSI spec allow for more than 8 2715 * luns, but have deprecated lun information in the 2716 * CDB. So, if the lun won't fit, we must omit. 2717 * 2718 * Also be aware that during initial probing for devices, 2719 * the inquiry information is unknown but initialized to 0. 2720 * This means that this code will be exercised while probing 2721 * devices with an ANSI revision greater than 2. 2722 */ 2723 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2724 && start_ccb->ccb_h.target_lun < 8 2725 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2726 2727 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2728 start_ccb->ccb_h.target_lun << 5; 2729 } 2730 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2731 start_ccb->csio.sense_resid = 0; 2732 start_ccb->csio.resid = 0; 2733 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2734 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2735 &path->device->inq_data), 2736 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2737 cdb_str, sizeof(cdb_str)))); 2738 /* FALLTRHOUGH */ 2739 } 2740 case XPT_TARGET_IO: 2741 case XPT_CONT_TARGET_IO: 2742 case XPT_ENG_EXEC: 2743 { 2744 struct cam_path *path; 2745 int s; 2746 int runq; 2747 2748 path = start_ccb->ccb_h.path; 2749 s = splsoftcam(); 2750 2751 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2752 if (path->device->qfrozen_cnt == 0) 2753 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2754 else 2755 runq = 0; 2756 splx(s); 2757 if (runq != 0) 2758 xpt_run_dev_sendq(path->bus); 2759 break; 2760 } 2761 case XPT_SET_TRAN_SETTINGS: 2762 { 2763 xpt_set_transfer_settings(&start_ccb->cts, 2764 start_ccb->ccb_h.path->device, 2765 /*async_update*/FALSE); 2766 break; 2767 } 2768 case XPT_CALC_GEOMETRY: 2769 /* Filter out garbage */ 2770 if (start_ccb->ccg.block_size == 0 2771 || start_ccb->ccg.volume_size == 0) { 2772 start_ccb->ccg.cylinders = 0; 2773 start_ccb->ccg.heads = 0; 2774 start_ccb->ccg.secs_per_track = 0; 2775 start_ccb->ccb_h.status = CAM_REQ_CMP; 2776 break; 2777 } 2778#ifdef PC98 2779 /* 2780 * In a PC-98 system, geometry translation depens on 2781 * the "real" device geometry obtained from mode page 4. 2782 * SCSI geometry translation is performed in the 2783 * initialization routine of the SCSI BIOS and the result 2784 * stored in host memory. If the translation is available 2785 * in host memory, use it. If not, rely on the default 2786 * translation the device driver performs. 2787 */ 2788 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2789 start_ccb->ccb_h.status = CAM_REQ_CMP; 2790 break; 2791 } 2792 /* FALLTHROUGH */ 2793#endif 2794 case XPT_ABORT: 2795 case XPT_RESET_DEV: 2796 case XPT_ACCEPT_TARGET_IO: 2797 case XPT_EN_LUN: 2798 case XPT_IMMED_NOTIFY: 2799 case XPT_NOTIFY_ACK: 2800 case XPT_GET_TRAN_SETTINGS: 2801 case XPT_PATH_INQ: 2802 case XPT_RESET_BUS: 2803 { 2804 struct cam_sim *sim; 2805 2806 sim = start_ccb->ccb_h.path->bus->sim; 2807 (*(sim->sim_action))(sim, start_ccb); 2808 break; 2809 } 2810 case XPT_GDEV_TYPE: 2811 { 2812 int s; 2813 2814 s = splcam(); 2815 if ((start_ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) != 0) { 2816 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2817 } else { 2818 struct ccb_getdev *cgd; 2819 struct cam_et *tar; 2820 struct cam_ed *dev; 2821 2822 cgd = &start_ccb->cgd; 2823 tar = cgd->ccb_h.path->target; 2824 dev = cgd->ccb_h.path->device; 2825 cgd->inq_data = dev->inq_data; 2826 cgd->pd_type = SID_TYPE(&dev->inq_data); 2827 cgd->dev_openings = dev->ccbq.dev_openings; 2828 cgd->dev_active = dev->ccbq.dev_active; 2829 cgd->devq_openings = dev->ccbq.devq_openings; 2830 cgd->devq_queued = dev->ccbq.queue.entries; 2831 cgd->held = dev->ccbq.held; 2832 cgd->maxtags = dev->quirk->maxtags; 2833 cgd->mintags = dev->quirk->mintags; 2834 cgd->ccb_h.status = CAM_REQ_CMP; 2835 cgd->serial_num_len = dev->serial_num_len; 2836 if ((dev->serial_num_len > 0) 2837 && (dev->serial_num != NULL)) 2838 bcopy(dev->serial_num, cgd->serial_num, 2839 dev->serial_num_len); 2840 } 2841 splx(s); 2842 break; 2843 } 2844 case XPT_GDEVLIST: 2845 { 2846 struct cam_periph *nperiph; 2847 struct periph_list *periph_head; 2848 struct ccb_getdevlist *cgdl; 2849 int i; 2850 int s; 2851 struct cam_ed *device; 2852 int found; 2853 2854 2855 found = 0; 2856 2857 /* 2858 * Don't want anyone mucking with our data. 2859 */ 2860 s = splcam(); 2861 device = start_ccb->ccb_h.path->device; 2862 periph_head = &device->periphs; 2863 cgdl = &start_ccb->cgdl; 2864 2865 /* 2866 * Check and see if the list has changed since the user 2867 * last requested a list member. If so, tell them that the 2868 * list has changed, and therefore they need to start over 2869 * from the beginning. 2870 */ 2871 if ((cgdl->index != 0) && 2872 (cgdl->generation != device->generation)) { 2873 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2874 splx(s); 2875 break; 2876 } 2877 2878 /* 2879 * Traverse the list of peripherals and attempt to find 2880 * the requested peripheral. 2881 */ 2882 for (nperiph = periph_head->slh_first, i = 0; 2883 (nperiph != NULL) && (i <= cgdl->index); 2884 nperiph = nperiph->periph_links.sle_next, i++) { 2885 if (i == cgdl->index) { 2886 strncpy(cgdl->periph_name, 2887 nperiph->periph_name, 2888 DEV_IDLEN); 2889 cgdl->unit_number = nperiph->unit_number; 2890 found = 1; 2891 } 2892 } 2893 if (found == 0) { 2894 cgdl->status = CAM_GDEVLIST_ERROR; 2895 splx(s); 2896 break; 2897 } 2898 2899 if (nperiph == NULL) 2900 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 2901 else 2902 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 2903 2904 cgdl->index++; 2905 cgdl->generation = device->generation; 2906 2907 splx(s); 2908 cgdl->ccb_h.status = CAM_REQ_CMP; 2909 break; 2910 } 2911 case XPT_DEV_MATCH: 2912 { 2913 int s; 2914 dev_pos_type position_type; 2915 struct ccb_dev_match *cdm; 2916 int ret; 2917 2918 cdm = &start_ccb->cdm; 2919 2920 /* 2921 * Prevent EDT changes while we traverse it. 2922 */ 2923 s = splcam(); 2924 /* 2925 * There are two ways of getting at information in the EDT. 2926 * The first way is via the primary EDT tree. It starts 2927 * with a list of busses, then a list of targets on a bus, 2928 * then devices/luns on a target, and then peripherals on a 2929 * device/lun. The "other" way is by the peripheral driver 2930 * lists. The peripheral driver lists are organized by 2931 * peripheral driver. (obviously) So it makes sense to 2932 * use the peripheral driver list if the user is looking 2933 * for something like "da1", or all "da" devices. If the 2934 * user is looking for something on a particular bus/target 2935 * or lun, it's generally better to go through the EDT tree. 2936 */ 2937 2938 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 2939 position_type = cdm->pos.position_type; 2940 else { 2941 int i; 2942 2943 position_type = CAM_DEV_POS_NONE; 2944 2945 for (i = 0; i < cdm->num_patterns; i++) { 2946 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 2947 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 2948 position_type = CAM_DEV_POS_EDT; 2949 break; 2950 } 2951 } 2952 2953 if (cdm->num_patterns == 0) 2954 position_type = CAM_DEV_POS_EDT; 2955 else if (position_type == CAM_DEV_POS_NONE) 2956 position_type = CAM_DEV_POS_PDRV; 2957 } 2958 2959 switch(position_type & CAM_DEV_POS_TYPEMASK) { 2960 case CAM_DEV_POS_EDT: 2961 ret = xptedtmatch(cdm); 2962 break; 2963 case CAM_DEV_POS_PDRV: 2964 ret = xptperiphlistmatch(cdm); 2965 break; 2966 default: 2967 cdm->status = CAM_DEV_MATCH_ERROR; 2968 break; 2969 } 2970 2971 splx(s); 2972 2973 if (cdm->status == CAM_DEV_MATCH_ERROR) 2974 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 2975 else 2976 start_ccb->ccb_h.status = CAM_REQ_CMP; 2977 2978 break; 2979 } 2980 case XPT_SASYNC_CB: 2981 { 2982 struct ccb_setasync *csa; 2983 struct async_node *cur_entry; 2984 struct async_list *async_head; 2985 u_int32_t added; 2986 int s; 2987 2988 csa = &start_ccb->csa; 2989 added = csa->event_enable; 2990 async_head = &csa->ccb_h.path->device->asyncs; 2991 2992 /* 2993 * If there is already an entry for us, simply 2994 * update it. 2995 */ 2996 s = splcam(); 2997 cur_entry = SLIST_FIRST(async_head); 2998 while (cur_entry != NULL) { 2999 if ((cur_entry->callback_arg == csa->callback_arg) 3000 && (cur_entry->callback == csa->callback)) 3001 break; 3002 cur_entry = SLIST_NEXT(cur_entry, links); 3003 } 3004 3005 if (cur_entry != NULL) { 3006 /* 3007 * If the request has no flags set, 3008 * remove the entry. 3009 */ 3010 added &= ~cur_entry->event_enable; 3011 if (csa->event_enable == 0) { 3012 SLIST_REMOVE(async_head, cur_entry, 3013 async_node, links); 3014 csa->ccb_h.path->device->refcount--; 3015 free(cur_entry, M_DEVBUF); 3016 } else { 3017 cur_entry->event_enable = csa->event_enable; 3018 } 3019 } else { 3020 cur_entry = malloc(sizeof(*cur_entry), M_DEVBUF, 3021 M_NOWAIT); 3022 if (cur_entry == NULL) { 3023 splx(s); 3024 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 3025 break; 3026 } 3027 cur_entry->callback_arg = csa->callback_arg; 3028 cur_entry->callback = csa->callback; 3029 cur_entry->event_enable = csa->event_enable; 3030 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3031 csa->ccb_h.path->device->refcount++; 3032 } 3033 3034 if ((added & AC_FOUND_DEVICE) != 0) { 3035 /* 3036 * Get this peripheral up to date with all 3037 * the currently existing devices. 3038 */ 3039 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3040 } 3041 if ((added & AC_PATH_REGISTERED) != 0) { 3042 /* 3043 * Get this peripheral up to date with all 3044 * the currently existing busses. 3045 */ 3046 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3047 } 3048 splx(s); 3049 start_ccb->ccb_h.status = CAM_REQ_CMP; 3050 break; 3051 } 3052 case XPT_REL_SIMQ: 3053 { 3054 struct ccb_relsim *crs; 3055 struct cam_ed *dev; 3056 int s; 3057 3058 crs = &start_ccb->crs; 3059 dev = crs->ccb_h.path->device; 3060 if (dev == NULL) { 3061 3062 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3063 break; 3064 } 3065 3066 s = splcam(); 3067 3068 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3069 3070 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3071 3072 /* Don't ever go below one opening */ 3073 if (crs->openings > 0) { 3074 xpt_dev_ccbq_resize(crs->ccb_h.path, 3075 crs->openings); 3076 3077 if (bootverbose) { 3078 xpt_print_path(crs->ccb_h.path); 3079 printf("tagged openings " 3080 "now %d\n", 3081 crs->openings); 3082 } 3083 } 3084 } 3085 } 3086 3087 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3088 3089 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3090 3091 /* 3092 * Just extend the old timeout and decrement 3093 * the freeze count so that a single timeout 3094 * is sufficient for releasing the queue. 3095 */ 3096 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3097 untimeout(xpt_release_devq_timeout, 3098 dev, dev->c_handle); 3099 } else { 3100 3101 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3102 } 3103 3104 dev->c_handle = 3105 timeout(xpt_release_devq_timeout, 3106 dev, 3107 (crs->release_timeout * hz) / 1000); 3108 3109 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3110 3111 } 3112 3113 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3114 3115 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3116 /* 3117 * Decrement the freeze count so that a single 3118 * completion is still sufficient to unfreeze 3119 * the queue. 3120 */ 3121 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3122 } else { 3123 3124 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3125 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3126 } 3127 } 3128 3129 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3130 3131 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3132 || (dev->ccbq.dev_active == 0)) { 3133 3134 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3135 } else { 3136 3137 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3138 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3139 } 3140 } 3141 splx(s); 3142 3143 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3144 3145 xpt_release_devq(crs->ccb_h.path->device, 3146 /*run_queue*/TRUE); 3147 } 3148 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3149 start_ccb->ccb_h.status = CAM_REQ_CMP; 3150 break; 3151 } 3152 case XPT_SCAN_BUS: 3153 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3154 break; 3155 case XPT_SCAN_LUN: 3156 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3157 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3158 start_ccb); 3159 break; 3160 case XPT_DEBUG: { 3161#ifdef CAMDEBUG 3162 int s; 3163 3164 s = splcam(); 3165 cam_dflags = start_ccb->cdbg.flags; 3166 if (cam_dpath != NULL) { 3167 xpt_free_path(cam_dpath); 3168 cam_dpath = NULL; 3169 } 3170 3171 if (cam_dflags != CAM_DEBUG_NONE) { 3172 if (xpt_create_path(&cam_dpath, xpt_periph, 3173 start_ccb->ccb_h.path_id, 3174 start_ccb->ccb_h.target_id, 3175 start_ccb->ccb_h.target_lun) != 3176 CAM_REQ_CMP) { 3177 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3178 cam_dflags = CAM_DEBUG_NONE; 3179 } else { 3180 start_ccb->ccb_h.status = CAM_REQ_CMP; 3181 xpt_print_path(cam_dpath); 3182 printf("debugging flags now %x\n", cam_dflags); 3183 } 3184 } else { 3185 cam_dpath = NULL; 3186 start_ccb->ccb_h.status = CAM_REQ_CMP; 3187 } 3188 splx(s); 3189#else /* !CAMDEBUG */ 3190 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3191#endif /* CAMDEBUG */ 3192 break; 3193 } 3194 case XPT_NOOP: 3195 start_ccb->ccb_h.status = CAM_REQ_CMP; 3196 break; 3197 default: 3198 case XPT_SDEV_TYPE: 3199 case XPT_TERM_IO: 3200 case XPT_ENG_INQ: 3201 /* XXX Implement */ 3202 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3203 break; 3204 } 3205} 3206 3207void 3208xpt_polled_action(union ccb *start_ccb) 3209{ 3210 int s; 3211 u_int32_t timeout; 3212 struct cam_sim *sim; 3213 struct cam_devq *devq; 3214 struct cam_ed *dev; 3215 3216 timeout = start_ccb->ccb_h.timeout; 3217 sim = start_ccb->ccb_h.path->bus->sim; 3218 devq = sim->devq; 3219 dev = start_ccb->ccb_h.path->device; 3220 3221 s = splcam(); 3222 3223 /* 3224 * Steal an opening so that no other queued requests 3225 * can get it before us while we simulate interrupts. 3226 */ 3227 dev->ccbq.devq_openings--; 3228 dev->ccbq.dev_openings--; 3229 3230 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) 3231 && (--timeout > 0)) { 3232 DELAY(1000); 3233 (*(sim->sim_poll))(sim); 3234 swi_camnet(); 3235 swi_cambio(); 3236 } 3237 3238 dev->ccbq.devq_openings++; 3239 dev->ccbq.dev_openings++; 3240 3241 if (timeout != 0) { 3242 xpt_action(start_ccb); 3243 while(--timeout > 0) { 3244 (*(sim->sim_poll))(sim); 3245 swi_camnet(); 3246 swi_cambio(); 3247 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3248 != CAM_REQ_INPROG) 3249 break; 3250 DELAY(1000); 3251 } 3252 if (timeout == 0) { 3253 /* 3254 * XXX Is it worth adding a sim_timeout entry 3255 * point so we can attempt recovery? If 3256 * this is only used for dumps, I don't think 3257 * it is. 3258 */ 3259 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3260 } 3261 } else { 3262 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3263 } 3264 splx(s); 3265} 3266 3267/* 3268 * Schedule a peripheral driver to receive a ccb when it's 3269 * target device has space for more transactions. 3270 */ 3271void 3272xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3273{ 3274 struct cam_ed *device; 3275 int s; 3276 int runq; 3277 3278 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3279 device = perph->path->device; 3280 s = splsoftcam(); 3281 if (periph_is_queued(perph)) { 3282 /* Simply reorder based on new priority */ 3283 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3284 (" change priority to %d\n", new_priority)); 3285 if (new_priority < perph->pinfo.priority) { 3286 camq_change_priority(&device->drvq, 3287 perph->pinfo.index, 3288 new_priority); 3289 } 3290 runq = 0; 3291 } else { 3292 /* New entry on the queue */ 3293 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3294 (" added periph to queue\n")); 3295 perph->pinfo.priority = new_priority; 3296 perph->pinfo.generation = ++device->drvq.generation; 3297 camq_insert(&device->drvq, &perph->pinfo); 3298 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3299 } 3300 splx(s); 3301 if (runq != 0) { 3302 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3303 (" calling xpt_run_devq\n")); 3304 xpt_run_dev_allocq(perph->path->bus); 3305 } 3306} 3307 3308 3309/* 3310 * Schedule a device to run on a given queue. 3311 * If the device was inserted as a new entry on the queue, 3312 * return 1 meaning the device queue should be run. If we 3313 * were already queued, implying someone else has already 3314 * started the queue, return 0 so the caller doesn't attempt 3315 * to run the queue. Must be run at either splsoftcam 3316 * (or splcam since that encompases splsoftcam). 3317 */ 3318static int 3319xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3320 u_int32_t new_priority) 3321{ 3322 int retval; 3323 u_int32_t old_priority; 3324 3325 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3326 3327 old_priority = pinfo->priority; 3328 3329 /* 3330 * Are we already queued? 3331 */ 3332 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3333 /* Simply reorder based on new priority */ 3334 if (new_priority < old_priority) { 3335 camq_change_priority(queue, pinfo->index, 3336 new_priority); 3337 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3338 ("changed priority to %d\n", 3339 new_priority)); 3340 } 3341 retval = 0; 3342 } else { 3343 /* New entry on the queue */ 3344 if (new_priority < old_priority) 3345 pinfo->priority = new_priority; 3346 3347 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3348 ("Inserting onto queue\n")); 3349 pinfo->generation = ++queue->generation; 3350 camq_insert(queue, pinfo); 3351 retval = 1; 3352 } 3353 return (retval); 3354} 3355 3356static void 3357xpt_run_dev_allocq(struct cam_eb *bus) 3358{ 3359 struct cam_devq *devq; 3360 int s; 3361 3362 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3363 devq = bus->sim->devq; 3364 3365 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3366 (" qfrozen_cnt == 0x%x, entries == %d, " 3367 "openings == %d, active == %d\n", 3368 devq->alloc_queue.qfrozen_cnt, 3369 devq->alloc_queue.entries, 3370 devq->alloc_openings, 3371 devq->alloc_active)); 3372 3373 s = splsoftcam(); 3374 devq->alloc_queue.qfrozen_cnt++; 3375 while ((devq->alloc_queue.entries > 0) 3376 && (devq->alloc_openings > 0) 3377 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3378 struct cam_ed_qinfo *qinfo; 3379 struct cam_ed *device; 3380 union ccb *work_ccb; 3381 struct cam_periph *drv; 3382 struct camq *drvq; 3383 3384 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3385 /*position*/0); 3386 device = qinfo->device; 3387 3388 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3389 ("running device %p\n", device)); 3390 3391 drvq = &device->drvq; 3392 3393#ifdef CAMDEBUG 3394 if (drvq->entries <= 0) { 3395 panic("xpt_run_dev_allocq: " 3396 "Device on queue without any work to do"); 3397 } 3398#endif 3399 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3400 devq->alloc_openings--; 3401 devq->alloc_active++; 3402 drv = (struct cam_periph*)camq_remove(drvq, 3403 /*pos*/0); 3404 /* Update priority */ 3405 if (drvq->entries > 0) { 3406 qinfo->pinfo.priority = drvq->queue_array[0]->priority; 3407 } else { 3408 qinfo->pinfo.priority = CAM_PRIORITY_NONE; 3409 } 3410 splx(s); 3411 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3412 drv->pinfo.priority); 3413 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3414 ("calling periph start\n")); 3415 drv->periph_start(drv, work_ccb); 3416 } else { 3417 /* 3418 * Malloc failure in alloc_ccb 3419 */ 3420 /* 3421 * XXX add us to a list to be run from free_ccb 3422 * if we don't have any ccbs active on this 3423 * device queue otherwise we may never get run 3424 * again. 3425 */ 3426 break; 3427 } 3428 3429 /* Raise IPL for possible insertion and test at top of loop */ 3430 s = splsoftcam(); 3431 3432 if (drvq->entries > 0) { 3433 /* We have more work. Attempt to reschedule */ 3434 xpt_schedule_dev_allocq(bus, device); 3435 } 3436 } 3437 devq->alloc_queue.qfrozen_cnt--; 3438 splx(s); 3439} 3440 3441static void 3442xpt_run_dev_sendq(struct cam_eb *bus) 3443{ 3444 struct cam_devq *devq; 3445 int s; 3446 3447 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3448 3449 devq = bus->sim->devq; 3450 3451 s = splcam(); 3452 devq->send_queue.qfrozen_cnt++; 3453 splx(s); 3454 s = splsoftcam(); 3455 while ((devq->send_queue.entries > 0) 3456 && (devq->send_openings > 0)) { 3457 struct cam_ed_qinfo *qinfo; 3458 struct cam_ed *device; 3459 union ccb *work_ccb; 3460 struct cam_sim *sim; 3461 int ospl; 3462 3463 ospl = splcam(); 3464 if (devq->send_queue.qfrozen_cnt > 1) { 3465 splx(ospl); 3466 break; 3467 } 3468 3469 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3470 /*position*/0); 3471 device = qinfo->device; 3472 3473 /* 3474 * If the device has been "frozen", don't attempt 3475 * to run it. 3476 */ 3477 if (device->qfrozen_cnt > 0) { 3478 splx(ospl); 3479 continue; 3480 } 3481 3482 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3483 ("running device %p\n", device)); 3484 3485 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, 0); 3486 if (work_ccb == NULL) { 3487 printf("device on run queue with no ccbs???"); 3488 splx(ospl); 3489 continue; 3490 } 3491 3492 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3493 3494 if (num_highpower <= 0) { 3495 /* 3496 * We got a high power command, but we 3497 * don't have any available slots. Freeze 3498 * the device queue until we have a slot 3499 * available. 3500 */ 3501 device->qfrozen_cnt++; 3502 STAILQ_INSERT_TAIL(&highpowerq, 3503 &work_ccb->ccb_h, 3504 xpt_links.stqe); 3505 3506 splx(ospl); 3507 continue; 3508 } else { 3509 /* 3510 * Consume a high power slot while 3511 * this ccb runs. 3512 */ 3513 num_highpower--; 3514 } 3515 } 3516 devq->active_dev = device; 3517 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3518 3519 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3520 splx(ospl); 3521 3522 devq->send_openings--; 3523 devq->send_active++; 3524 3525 if (device->ccbq.queue.entries > 0) { 3526 qinfo->pinfo.priority = 3527 device->ccbq.queue.queue_array[0]->priority; 3528 xpt_schedule_dev_sendq(bus, device); 3529 } else { 3530 qinfo->pinfo.priority = CAM_PRIORITY_NONE; 3531 } 3532 3533 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3534 /* 3535 * The client wants to freeze the queue 3536 * after this CCB is sent. 3537 */ 3538 ospl = splcam(); 3539 device->qfrozen_cnt++; 3540 splx(ospl); 3541 } 3542 3543 splx(s); 3544 3545 if ((device->inq_flags & SID_CmdQue) != 0) 3546 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3547 else 3548 /* 3549 * Clear this in case of a retried CCB that failed 3550 * due to a rejected tag. 3551 */ 3552 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3553 3554 /* 3555 * Device queues can be shared among multiple sim instances 3556 * that reside on different busses. Use the SIM in the queue 3557 * CCB's path, rather than the one in the bus that was passed 3558 * into this function. 3559 */ 3560 sim = work_ccb->ccb_h.path->bus->sim; 3561 (*(sim->sim_action))(sim, work_ccb); 3562 3563 ospl = splcam(); 3564 devq->active_dev = NULL; 3565 splx(ospl); 3566 /* Raise IPL for possible insertion and test at top of loop */ 3567 s = splsoftcam(); 3568 } 3569 splx(s); 3570 s = splcam(); 3571 devq->send_queue.qfrozen_cnt--; 3572 splx(s); 3573} 3574 3575/* 3576 * This function merges stuff from the slave ccb into the master ccb, while 3577 * keeping important fields in the master ccb constant. 3578 */ 3579void 3580xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3581{ 3582 /* 3583 * Pull fields that are valid for peripheral drivers to set 3584 * into the master CCB along with the CCB "payload". 3585 */ 3586 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3587 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3588 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3589 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3590 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3591 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3592} 3593 3594void 3595xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3596{ 3597 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3598 ccb_h->pinfo.priority = priority; 3599 ccb_h->path = path; 3600 ccb_h->path_id = path->bus->path_id; 3601 if (path->target) 3602 ccb_h->target_id = path->target->target_id; 3603 else 3604 ccb_h->target_id = CAM_TARGET_WILDCARD; 3605 if (path->device) { 3606 ccb_h->target_lun = path->device->lun_id; 3607 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3608 } else { 3609 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3610 } 3611 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3612 ccb_h->flags = 0; 3613} 3614 3615/* Path manipulation functions */ 3616cam_status 3617xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3618 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3619{ 3620 struct cam_path *path; 3621 cam_status status; 3622 3623 path = (struct cam_path *)malloc(sizeof(*path), M_DEVBUF, M_NOWAIT); 3624 3625 if (path == NULL) { 3626 status = CAM_RESRC_UNAVAIL; 3627 return(status); 3628 } 3629 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3630 if (status != CAM_REQ_CMP) { 3631 free(path, M_DEVBUF); 3632 path = NULL; 3633 } 3634 *new_path_ptr = path; 3635 return (status); 3636} 3637 3638static cam_status 3639xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3640 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3641{ 3642 struct cam_eb *bus; 3643 struct cam_et *target; 3644 struct cam_ed *device; 3645 cam_status status; 3646 int s; 3647 3648 status = CAM_REQ_CMP; /* Completed without error */ 3649 target = NULL; /* Wildcarded */ 3650 device = NULL; /* Wildcarded */ 3651 3652 /* 3653 * We will potentially modify the EDT, so block interrupts 3654 * that may attempt to create cam paths. 3655 */ 3656 s = splcam(); 3657 bus = xpt_find_bus(path_id); 3658 if (bus == NULL) { 3659 status = CAM_PATH_INVALID; 3660 } else { 3661 target = xpt_find_target(bus, target_id); 3662 if (target == NULL) { 3663 /* Create one */ 3664 struct cam_et *new_target; 3665 3666 new_target = xpt_alloc_target(bus, target_id); 3667 if (new_target == NULL) { 3668 status = CAM_RESRC_UNAVAIL; 3669 } else { 3670 target = new_target; 3671 } 3672 } 3673 if (target != NULL) { 3674 device = xpt_find_device(target, lun_id); 3675 if (device == NULL) { 3676 /* Create one */ 3677 struct cam_ed *new_device; 3678 3679 new_device = xpt_alloc_device(bus, 3680 target, 3681 lun_id); 3682 if (new_device == NULL) { 3683 status = CAM_RESRC_UNAVAIL; 3684 } else { 3685 device = new_device; 3686 } 3687 } 3688 } 3689 } 3690 splx(s); 3691 3692 /* 3693 * Only touch the user's data if we are successful. 3694 */ 3695 if (status == CAM_REQ_CMP) { 3696 new_path->periph = perph; 3697 new_path->bus = bus; 3698 new_path->target = target; 3699 new_path->device = device; 3700 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3701 } else { 3702 if (device != NULL) 3703 xpt_release_device(bus, target, device); 3704 if (target != NULL) 3705 xpt_release_target(bus, target); 3706 if (bus != NULL) 3707 xpt_release_bus(bus); 3708 } 3709 return (status); 3710} 3711 3712static void 3713xpt_release_path(struct cam_path *path) 3714{ 3715 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3716 if (path->device != NULL) 3717 xpt_release_device(path->bus, path->target, path->device); 3718 if (path->target != NULL) 3719 xpt_release_target(path->bus, path->target); 3720} 3721 3722void 3723xpt_free_path(struct cam_path *path) 3724{ 3725 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3726 xpt_release_path(path); 3727 free(path, M_DEVBUF); 3728} 3729 3730 3731/* 3732 * Return -1 for failure, 0 for exact match, 1 for match with wildcards. 3733 */ 3734int 3735xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3736{ 3737 int retval = 0; 3738 3739 if (path1->bus != path2->bus) { 3740 if ((path1->bus == NULL) 3741 || (path2->bus == NULL)) 3742 retval = 1; 3743 else 3744 return (-1); 3745 } 3746 if (path1->target != path2->target) { 3747 if ((path1->target == NULL) 3748 || (path2->target == NULL)) 3749 retval = 1; 3750 else 3751 return (-1); 3752 } 3753 if (path1->device != path2->device) { 3754 if ((path1->device == NULL) 3755 || (path2->device == NULL)) 3756 retval = 1; 3757 else 3758 return (-1); 3759 } 3760 return (retval); 3761} 3762 3763void 3764xpt_print_path(struct cam_path *path) 3765{ 3766 if (path == NULL) 3767 printf("(nopath): "); 3768 else { 3769 if (path->periph != NULL) 3770 printf("(%s%d:", path->periph->periph_name, 3771 path->periph->unit_number); 3772 else 3773 printf("(noperiph:"); 3774 3775 if (path->bus != NULL) 3776 printf("%s%d:%d:", path->bus->sim->sim_name, 3777 path->bus->sim->unit_number, 3778 path->bus->sim->bus_id); 3779 else 3780 printf("nobus:"); 3781 3782 if (path->target != NULL) 3783 printf("%d:", path->target->target_id); 3784 else 3785 printf("X:"); 3786 3787 if (path->device != NULL) 3788 printf("%d): ", path->device->lun_id); 3789 else 3790 printf("X): "); 3791 } 3792} 3793 3794path_id_t 3795xpt_path_path_id(struct cam_path *path) 3796{ 3797 return(path->bus->path_id); 3798} 3799 3800target_id_t 3801xpt_path_target_id(struct cam_path *path) 3802{ 3803 if (path->target != NULL) 3804 return (path->target->target_id); 3805 else 3806 return (CAM_TARGET_WILDCARD); 3807} 3808 3809lun_id_t 3810xpt_path_lun_id(struct cam_path *path) 3811{ 3812 if (path->device != NULL) 3813 return (path->device->lun_id); 3814 else 3815 return (CAM_LUN_WILDCARD); 3816} 3817 3818struct cam_sim * 3819xpt_path_sim(struct cam_path *path) 3820{ 3821 return (path->bus->sim); 3822} 3823 3824struct cam_periph* 3825xpt_path_periph(struct cam_path *path) 3826{ 3827 return (path->periph); 3828} 3829 3830/* 3831 * Release a CAM control block for the caller. Remit the cost of the structure 3832 * to the device referenced by the path. If the this device had no 'credits' 3833 * and peripheral drivers have registered async callbacks for this notification 3834 * call them now. 3835 */ 3836void 3837xpt_release_ccb(union ccb *free_ccb) 3838{ 3839 int s; 3840 struct cam_path *path; 3841 struct cam_ed *device; 3842 struct cam_eb *bus; 3843 3844 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3845 path = free_ccb->ccb_h.path; 3846 device = path->device; 3847 bus = path->bus; 3848 s = splsoftcam(); 3849 cam_ccbq_release_opening(&device->ccbq); 3850 if (xpt_ccb_count > xpt_max_ccbs) { 3851 xpt_free_ccb(free_ccb); 3852 xpt_ccb_count--; 3853 } else { 3854 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 3855 } 3856 bus->sim->devq->alloc_openings++; 3857 bus->sim->devq->alloc_active--; 3858 /* XXX Turn this into an inline function - xpt_run_device?? */ 3859 if ((device_is_alloc_queued(device) == 0) 3860 && (device->drvq.entries > 0)) { 3861 xpt_schedule_dev_allocq(bus, device); 3862 } 3863 splx(s); 3864 if (dev_allocq_is_runnable(bus->sim->devq)) 3865 xpt_run_dev_allocq(bus); 3866} 3867 3868/* Functions accessed by SIM drivers */ 3869 3870/* 3871 * A sim structure, listing the SIM entry points and instance 3872 * identification info is passed to xpt_bus_register to hook the SIM 3873 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3874 * for this new bus and places it in the array of busses and assigns 3875 * it a path_id. The path_id may be influenced by "hard wiring" 3876 * information specified by the user. Once interrupt services are 3877 * availible, the bus will be probed. 3878 */ 3879int32_t 3880xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 3881{ 3882 static path_id_t buscount; 3883 struct cam_eb *new_bus; 3884 struct ccb_pathinq cpi; 3885 int s; 3886 3887 sim->bus_id = bus; 3888 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 3889 M_DEVBUF, M_NOWAIT); 3890 if (new_bus == NULL) { 3891 /* Couldn't satisfy request */ 3892 return (CAM_RESRC_UNAVAIL); 3893 } 3894 3895 bzero(new_bus, sizeof(*new_bus)); 3896 3897 if (strcmp(sim->sim_name, "xpt") != 0) { 3898 3899 sim->path_id = xptpathid(sim->sim_name, sim->unit_number, 3900 sim->bus_id, &buscount); 3901 } 3902 3903 new_bus->path_id = sim->path_id; 3904 new_bus->sim = sim; 3905 TAILQ_INIT(&new_bus->et_entries); 3906 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3907 s = splcam(); 3908 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 3909 bus_generation++; 3910 splx(s); 3911 3912 /* Notify interested parties */ 3913 if (sim->path_id != CAM_XPT_PATH_ID) { 3914 struct cam_path path; 3915 3916 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 3917 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 3918 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 3919 cpi.ccb_h.func_code = XPT_PATH_INQ; 3920 xpt_action((union ccb *)&cpi); 3921 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi); 3922 xpt_release_path(&path); 3923 } 3924 return (CAM_SUCCESS); 3925} 3926 3927static int 3928xptnextfreebus(path_id_t startbus) 3929{ 3930 struct cam_sim_config *sim_conf; 3931 3932 sim_conf = cam_sinit; 3933 while (sim_conf->sim_name != NULL) { 3934 3935 if (IS_SPECIFIED(sim_conf->pathid) 3936 && (startbus == sim_conf->pathid)) { 3937 ++startbus; 3938 /* Start the search over */ 3939 sim_conf = cam_sinit; 3940 } else { 3941 sim_conf++; 3942 } 3943 } 3944 return (startbus); 3945} 3946 3947static int 3948xptpathid(const char *sim_name, int sim_unit, 3949 int sim_bus, path_id_t *nextpath) 3950{ 3951 struct cam_sim_config *sim_conf; 3952 path_id_t pathid; 3953 3954 pathid = CAM_XPT_PATH_ID; 3955 for (sim_conf = cam_sinit; sim_conf->sim_name != NULL; sim_conf++) { 3956 3957 if (!IS_SPECIFIED(sim_conf->pathid)) 3958 continue; 3959 3960 if (!strcmp(sim_name, sim_conf->sim_name) 3961 && (sim_unit == sim_conf->sim_unit)) { 3962 3963 if (IS_SPECIFIED(sim_conf->sim_bus)) { 3964 if (sim_bus == sim_conf->sim_bus) { 3965 pathid = sim_conf->pathid; 3966 break; 3967 } 3968 } else if (sim_bus == 0) { 3969 /* Unspecified matches bus 0 */ 3970 pathid = sim_conf->pathid; 3971 break; 3972 } else { 3973 printf("Ambiguous scbus configuration for %s%d " 3974 "bus %d, cannot wire down. The kernel " 3975 "config entry for scbus%d should " 3976 "specify a controller bus.\n" 3977 "Scbus will be assigned dynamically.\n", 3978 sim_name, sim_unit, sim_bus, 3979 sim_conf->pathid); 3980 break; 3981 } 3982 } 3983 } 3984 3985 if (pathid == CAM_XPT_PATH_ID) { 3986 pathid = xptnextfreebus(*nextpath); 3987 *nextpath = pathid + 1; 3988 } 3989 return (pathid); 3990} 3991 3992int32_t 3993xpt_bus_deregister(path_id) 3994 u_int8_t path_id; 3995{ 3996 /* XXX */ 3997 return (CAM_SUCCESS); 3998} 3999 4000void 4001xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4002{ 4003 struct cam_eb *bus; 4004 struct cam_et *target, *next_target; 4005 struct cam_ed *device, *next_device; 4006 int s; 4007 4008 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4009 4010 /* 4011 * Most async events come from a CAM interrupt context. In 4012 * a few cases, the error recovery code at the peripheral layer, 4013 * which may run from our SWI or a process context, may signal 4014 * deferred events with a call to xpt_async. Ensure async 4015 * notifications are serialized by blocking cam interrupts. 4016 */ 4017 s = splcam(); 4018 4019 bus = path->bus; 4020 4021 /* 4022 * Freeze the SIM queue for SCSI_DELAY ms to 4023 * allow the bus to settle. 4024 */ 4025 if (async_code == AC_BUS_RESET) { 4026 struct cam_sim *sim; 4027 4028 sim = bus->sim; 4029 4030 /* 4031 * If there isn't already another timeout pending, go ahead 4032 * and freeze the simq and set the timeout flag. If there 4033 * is another timeout pending, replace it with this 4034 * timeout. There could be two bus reset async broadcasts 4035 * sent for some dual-channel controllers. 4036 */ 4037 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) == 0) { 4038 xpt_freeze_simq(sim, 1); 4039 sim->flags |= CAM_SIM_REL_TIMEOUT_PENDING; 4040 } else 4041 untimeout(xpt_release_simq_timeout, sim, sim->c_handle); 4042 4043 sim->c_handle = timeout(xpt_release_simq_timeout, 4044 sim, (SCSI_DELAY * hz) / 1000); 4045 } 4046 4047 for (target = TAILQ_FIRST(&bus->et_entries); 4048 target != NULL; 4049 target = next_target) { 4050 4051 next_target = TAILQ_NEXT(target, links); 4052 4053 if (path->target != target 4054 && path->target != NULL) 4055 continue; 4056 4057 for (device = TAILQ_FIRST(&target->ed_entries); 4058 device != NULL; 4059 device = next_device) { 4060 cam_status status; 4061 struct cam_path newpath; 4062 4063 next_device = TAILQ_NEXT(device, links); 4064 4065 if (path->device != device 4066 && path->device != NULL) 4067 continue; 4068 4069 /* 4070 * We need our own path with wildcards expanded to 4071 * handle certain types of events. 4072 */ 4073 if ((async_code == AC_SENT_BDR) 4074 || (async_code == AC_BUS_RESET) 4075 || (async_code == AC_INQ_CHANGED)) 4076 status = xpt_compile_path(&newpath, NULL, 4077 bus->path_id, 4078 target->target_id, 4079 device->lun_id); 4080 else 4081 status = CAM_REQ_CMP_ERR; 4082 4083 if (status == CAM_REQ_CMP) { 4084 4085 /* 4086 * Allow transfer negotiation to occur in a 4087 * tag free environment. 4088 */ 4089 if (async_code == AC_SENT_BDR 4090 || async_code == AC_BUS_RESET) 4091 xpt_toggle_tags(&newpath); 4092 4093 /* 4094 * If we send a BDR, freeze the device queue 4095 * for SCSI_DELAY ms to allow it to settle 4096 * down. 4097 */ 4098 if (async_code == AC_SENT_BDR) { 4099 xpt_freeze_devq(&newpath, 1); 4100 /* 4101 * Although this looks bad, it 4102 * isn't as bad as it seems. We're 4103 * passing in a stack-allocated path 4104 * that we then immediately release 4105 * after scheduling a timeout to 4106 * release the device queue. So 4107 * the path won't be around when 4108 * the timeout fires, right? Right. 4109 * But it doesn't matter, since 4110 * xpt_release_devq and its timeout 4111 * function both take the device as 4112 * an argument. Theoretically, the 4113 * device will still be there when 4114 * the timeout fires, even though 4115 * the path will be gone. 4116 */ 4117 cam_release_devq( 4118 &newpath, 4119 /*relsim_flags*/ 4120 RELSIM_RELEASE_AFTER_TIMEOUT, 4121 /*reduction*/0, 4122 /*timeout*/SCSI_DELAY, 4123 /*getcount_only*/0); 4124 } else if (async_code == AC_INQ_CHANGED) { 4125 /* 4126 * We've sent a start unit command, or 4127 * something similar to a device that 4128 * may have caused its inquiry data to 4129 * change. So we re-scan the device to 4130 * refresh the inquiry data for it. 4131 */ 4132 xpt_scan_lun(newpath.periph, &newpath, 4133 CAM_EXPECT_INQ_CHANGE, 4134 NULL); 4135 } 4136 xpt_release_path(&newpath); 4137 } else if (async_code == AC_LOST_DEVICE) { 4138 device->flags |= CAM_DEV_UNCONFIGURED; 4139 } else if (async_code == AC_TRANSFER_NEG) { 4140 struct ccb_trans_settings *settings; 4141 4142 settings = 4143 (struct ccb_trans_settings *)async_arg; 4144 xpt_set_transfer_settings(settings, device, 4145 /*async_update*/TRUE); 4146 } 4147 4148 xpt_async_bcast(&device->asyncs, 4149 async_code, 4150 path, 4151 async_arg); 4152 } 4153 } 4154 4155 /* 4156 * If this wasn't a fully wildcarded async, tell all 4157 * clients that want all async events. 4158 */ 4159 if (bus != xpt_periph->path->bus) 4160 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4161 path, async_arg); 4162 splx(s); 4163} 4164 4165static void 4166xpt_async_bcast(struct async_list *async_head, 4167 u_int32_t async_code, 4168 struct cam_path *path, void *async_arg) 4169{ 4170 struct async_node *cur_entry; 4171 4172 cur_entry = SLIST_FIRST(async_head); 4173 while (cur_entry != NULL) { 4174 struct async_node *next_entry; 4175 /* 4176 * Grab the next list entry before we call the current 4177 * entry's callback. This is because the callback function 4178 * can delete its async callback entry. 4179 */ 4180 next_entry = SLIST_NEXT(cur_entry, links); 4181 if ((cur_entry->event_enable & async_code) != 0) 4182 cur_entry->callback(cur_entry->callback_arg, 4183 async_code, path, 4184 async_arg); 4185 cur_entry = next_entry; 4186 } 4187} 4188 4189u_int32_t 4190xpt_freeze_devq(struct cam_path *path, u_int count) 4191{ 4192 int s; 4193 struct ccb_hdr *ccbh; 4194 4195 s = splcam(); 4196 path->device->qfrozen_cnt += count; 4197 4198 /* 4199 * Mark the last CCB in the queue as needing 4200 * to be requeued if the driver hasn't 4201 * changed it's state yet. This fixes a race 4202 * where a ccb is just about to be queued to 4203 * a controller driver when it's interrupt routine 4204 * freezes the queue. To completly close the 4205 * hole, controller drives must check to see 4206 * if a ccb's status is still CAM_REQ_INPROG 4207 * under spl protection just before they queue 4208 * the CCB. See ahc_action/ahc_freeze_devq for 4209 * an example. 4210 */ 4211 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4212 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4213 ccbh->status = CAM_REQUEUE_REQ; 4214 splx(s); 4215 return (path->device->qfrozen_cnt); 4216} 4217 4218u_int32_t 4219xpt_freeze_simq(struct cam_sim *sim, u_int count) 4220{ 4221 sim->devq->send_queue.qfrozen_cnt += count; 4222 if (sim->devq->active_dev != NULL) { 4223 struct ccb_hdr *ccbh; 4224 4225 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4226 ccb_hdr_tailq); 4227 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4228 ccbh->status = CAM_REQUEUE_REQ; 4229 } 4230 return (sim->devq->send_queue.qfrozen_cnt); 4231} 4232 4233static void 4234xpt_release_devq_timeout(void *arg) 4235{ 4236 struct cam_ed *device; 4237 4238 device = (struct cam_ed *)arg; 4239 4240 xpt_release_devq(device, /*run_queue*/TRUE); 4241} 4242 4243void 4244xpt_release_devq(struct cam_ed *dev, int run_queue) 4245{ 4246 int rundevq; 4247 int s; 4248 4249 rundevq = 0; 4250 s = splcam(); 4251 if (dev->qfrozen_cnt > 0) { 4252 4253 dev->qfrozen_cnt--; 4254 if (dev->qfrozen_cnt == 0) { 4255 4256 /* 4257 * No longer need to wait for a successful 4258 * command completion. 4259 */ 4260 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4261 4262 /* 4263 * Remove any timeouts that might be scheduled 4264 * to release this queue. 4265 */ 4266 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4267 untimeout(xpt_release_devq_timeout, dev, 4268 dev->c_handle); 4269 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4270 } 4271 4272 /* 4273 * Now that we are unfrozen schedule the 4274 * device so any pending transactions are 4275 * run. 4276 */ 4277 if ((dev->ccbq.queue.entries > 0) 4278 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4279 && (run_queue != 0)) { 4280 rundevq = 1; 4281 } 4282 } 4283 } 4284 splx(s); 4285 if (rundevq != 0) 4286 xpt_run_dev_sendq(dev->target->bus); 4287} 4288 4289void 4290xpt_release_simq(struct cam_sim *sim, int run_queue) 4291{ 4292 int s; 4293 struct camq *sendq; 4294 4295 sendq = &(sim->devq->send_queue); 4296 s = splcam(); 4297 if (sendq->qfrozen_cnt > 0) { 4298 4299 sendq->qfrozen_cnt--; 4300 if (sendq->qfrozen_cnt == 0) { 4301 struct cam_eb *bus; 4302 4303 /* 4304 * If there is a timeout scheduled to release this 4305 * sim queue, remove it. The queue frozen count is 4306 * already at 0. 4307 */ 4308 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4309 untimeout(xpt_release_simq_timeout, sim, 4310 sim->c_handle); 4311 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4312 } 4313 bus = xpt_find_bus(sim->path_id); 4314 splx(s); 4315 4316 if (run_queue) { 4317 /* 4318 * Now that we are unfrozen run the send queue. 4319 */ 4320 xpt_run_dev_sendq(bus); 4321 } 4322 xpt_release_bus(bus); 4323 } else 4324 splx(s); 4325 } else 4326 splx(s); 4327} 4328 4329static void 4330xpt_release_simq_timeout(void *arg) 4331{ 4332 struct cam_sim *sim; 4333 4334 sim = (struct cam_sim *)arg; 4335 xpt_release_simq(sim, /* run_queue */ TRUE); 4336} 4337 4338void 4339xpt_done(union ccb *done_ccb) 4340{ 4341 int s; 4342 4343 s = splcam(); 4344 4345 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4346 switch (done_ccb->ccb_h.func_code) { 4347 case XPT_SCSI_IO: 4348 case XPT_ENG_EXEC: 4349 case XPT_TARGET_IO: 4350 case XPT_ACCEPT_TARGET_IO: 4351 case XPT_CONT_TARGET_IO: 4352 case XPT_IMMED_NOTIFY: 4353 case XPT_SCAN_BUS: 4354 case XPT_SCAN_LUN: 4355 { 4356 /* 4357 * Queue up the request for handling by our SWI handler 4358 * any of the "non-immediate" type of ccbs. 4359 */ 4360 switch (done_ccb->ccb_h.path->periph->type) { 4361 case CAM_PERIPH_BIO: 4362 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4363 sim_links.tqe); 4364 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4365 setsoftcambio(); 4366 break; 4367 case CAM_PERIPH_NET: 4368 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4369 sim_links.tqe); 4370 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4371 setsoftcamnet(); 4372 break; 4373 } 4374 break; 4375 } 4376 default: 4377 break; 4378 } 4379 splx(s); 4380} 4381 4382union ccb * 4383xpt_alloc_ccb() 4384{ 4385 union ccb *new_ccb; 4386 4387 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_WAITOK); 4388 return (new_ccb); 4389} 4390 4391void 4392xpt_free_ccb(union ccb *free_ccb) 4393{ 4394 free(free_ccb, M_DEVBUF); 4395} 4396 4397 4398 4399/* Private XPT functions */ 4400 4401/* 4402 * Get a CAM control block for the caller. Charge the structure to the device 4403 * referenced by the path. If the this device has no 'credits' then the 4404 * device already has the maximum number of outstanding operations under way 4405 * and we return NULL. If we don't have sufficient resources to allocate more 4406 * ccbs, we also return NULL. 4407 */ 4408static union ccb * 4409xpt_get_ccb(struct cam_ed *device) 4410{ 4411 union ccb *new_ccb; 4412 int s; 4413 4414 s = splsoftcam(); 4415 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) { 4416 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_NOWAIT); 4417 if (new_ccb == NULL) { 4418 splx(s); 4419 return (NULL); 4420 } 4421 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4422 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4423 xpt_links.sle); 4424 xpt_ccb_count++; 4425 } 4426 cam_ccbq_take_opening(&device->ccbq); 4427 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4428 splx(s); 4429 return (new_ccb); 4430} 4431 4432static void 4433xpt_release_bus(struct cam_eb *bus) 4434{ 4435 int s; 4436 4437 s = splcam(); 4438 if ((--bus->refcount == 0) 4439 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4440 TAILQ_REMOVE(&xpt_busses, bus, links); 4441 bus_generation++; 4442 splx(s); 4443 free(bus, M_DEVBUF); 4444 } else 4445 splx(s); 4446} 4447 4448static struct cam_et * 4449xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4450{ 4451 struct cam_et *target; 4452 4453 target = (struct cam_et *)malloc(sizeof(*target), M_DEVBUF, M_NOWAIT); 4454 if (target != NULL) { 4455 struct cam_et *cur_target; 4456 4457 target->bus = bus; 4458 target->target_id = target_id; 4459 target->refcount = 1; 4460 /* 4461 * Hold a reference to our parent bus so it 4462 * will not go away before we do. 4463 */ 4464 bus->refcount++; 4465 TAILQ_INIT(&target->ed_entries); 4466 4467 /* Insertion sort into our bus's target list */ 4468 cur_target = TAILQ_FIRST(&bus->et_entries); 4469 while (cur_target != NULL && cur_target->target_id < target_id) 4470 cur_target = TAILQ_NEXT(cur_target, links); 4471 4472 if (cur_target != NULL) { 4473 TAILQ_INSERT_BEFORE(cur_target, target, links); 4474 } else { 4475 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4476 } 4477 bus->generation++; 4478 } 4479 return (target); 4480} 4481 4482static void 4483xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4484{ 4485 int s; 4486 4487 s = splcam(); 4488 if ((--target->refcount == 0) 4489 && (TAILQ_FIRST(&target->ed_entries) == NULL)) { 4490 TAILQ_REMOVE(&bus->et_entries, target, links); 4491 bus->generation++; 4492 splx(s); 4493 free(target, M_DEVBUF); 4494 xpt_release_bus(bus); 4495 } else 4496 splx(s); 4497} 4498 4499static struct cam_ed * 4500xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4501{ 4502 struct cam_ed *device; 4503 struct cam_devq *devq; 4504 cam_status status; 4505 4506 /* Make space for us in the device queue on our bus */ 4507 devq = bus->sim->devq; 4508 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4509 4510 if (status != CAM_REQ_CMP) { 4511 device = NULL; 4512 } else { 4513 device = (struct cam_ed *)malloc(sizeof(*device), 4514 M_DEVBUF, M_NOWAIT); 4515 } 4516 4517 if (device != NULL) { 4518 struct cam_ed *cur_device; 4519 4520 bzero(device, sizeof(*device)); 4521 4522 SLIST_INIT(&device->asyncs); 4523 SLIST_INIT(&device->periphs); 4524 callout_handle_init(&device->c_handle); 4525 device->refcount = 1; 4526 device->flags |= CAM_DEV_UNCONFIGURED; 4527 4528 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4529 device->alloc_ccb_entry.device = device; 4530 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4531 device->send_ccb_entry.device = device; 4532 4533 device->target = target; 4534 /* 4535 * Hold a reference to our parent target so it 4536 * will not go away before we do. 4537 */ 4538 target->refcount++; 4539 4540 device->lun_id = lun_id; 4541 4542 /* Initialize our queues */ 4543 if (camq_init(&device->drvq, 0) != 0) { 4544 free(device, M_DEVBUF); 4545 return (NULL); 4546 } 4547 4548 if (cam_ccbq_init(&device->ccbq, 4549 bus->sim->max_dev_openings) != 0) { 4550 camq_fini(&device->drvq); 4551 free(device, M_DEVBUF); 4552 return (NULL); 4553 } 4554 /* 4555 * XXX should be limited by number of CCBs this bus can 4556 * do. 4557 */ 4558 xpt_max_ccbs += device->ccbq.devq_openings; 4559 /* Insertion sort into our target's device list */ 4560 cur_device = TAILQ_FIRST(&target->ed_entries); 4561 while (cur_device != NULL && cur_device->lun_id < lun_id) 4562 cur_device = TAILQ_NEXT(cur_device, links); 4563 if (cur_device != NULL) { 4564 TAILQ_INSERT_BEFORE(cur_device, device, links); 4565 } else { 4566 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4567 } 4568 target->generation++; 4569 } 4570 return (device); 4571} 4572 4573static void 4574xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4575 struct cam_ed *device) 4576{ 4577 int s; 4578 4579 s = splcam(); 4580 if ((--device->refcount == 0) 4581 && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) { 4582 struct cam_devq *devq; 4583 4584 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4585 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4586 panic("Removing device while still queued for ccbs"); 4587 TAILQ_REMOVE(&target->ed_entries, device,links); 4588 target->generation++; 4589 xpt_max_ccbs -= device->ccbq.devq_openings; 4590 /* Release our slot in the devq */ 4591 devq = bus->sim->devq; 4592 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4593 splx(s); 4594 free(device, M_DEVBUF); 4595 } else 4596 splx(s); 4597} 4598 4599static u_int32_t 4600xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4601{ 4602 int s; 4603 int diff; 4604 int result; 4605 struct cam_ed *dev; 4606 4607 dev = path->device; 4608 s = splsoftcam(); 4609 4610 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4611 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4612 if (result == CAM_REQ_CMP && (diff < 0)) { 4613 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4614 } 4615 /* Adjust the global limit */ 4616 xpt_max_ccbs += diff; 4617 splx(s); 4618 return (result); 4619} 4620 4621static struct cam_eb * 4622xpt_find_bus(path_id_t path_id) 4623{ 4624 struct cam_eb *bus; 4625 4626 for (bus = TAILQ_FIRST(&xpt_busses); 4627 bus != NULL; 4628 bus = TAILQ_NEXT(bus, links)) { 4629 if (bus->path_id == path_id) { 4630 bus->refcount++; 4631 break; 4632 } 4633 } 4634 return (bus); 4635} 4636 4637static struct cam_et * 4638xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4639{ 4640 struct cam_et *target; 4641 4642 for (target = TAILQ_FIRST(&bus->et_entries); 4643 target != NULL; 4644 target = TAILQ_NEXT(target, links)) { 4645 if (target->target_id == target_id) { 4646 target->refcount++; 4647 break; 4648 } 4649 } 4650 return (target); 4651} 4652 4653static struct cam_ed * 4654xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4655{ 4656 struct cam_ed *device; 4657 4658 for (device = TAILQ_FIRST(&target->ed_entries); 4659 device != NULL; 4660 device = TAILQ_NEXT(device, links)) { 4661 if (device->lun_id == lun_id) { 4662 device->refcount++; 4663 break; 4664 } 4665 } 4666 return (device); 4667} 4668 4669typedef struct { 4670 union ccb *request_ccb; 4671 struct ccb_pathinq *cpi; 4672 int pending_count; 4673} xpt_scan_bus_info; 4674 4675/* 4676 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4677 * As the scan progresses, xpt_scan_bus is used as the 4678 * callback on completion function. 4679 */ 4680static void 4681xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 4682{ 4683 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4684 ("xpt_scan_bus\n")); 4685 switch (request_ccb->ccb_h.func_code) { 4686 case XPT_SCAN_BUS: 4687 { 4688 xpt_scan_bus_info *scan_info; 4689 union ccb *work_ccb; 4690 struct cam_path *path; 4691 u_int i; 4692 u_int max_target; 4693 u_int initiator_id; 4694 4695 /* Find out the characteristics of the bus */ 4696 work_ccb = xpt_alloc_ccb(); 4697 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 4698 request_ccb->ccb_h.pinfo.priority); 4699 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4700 xpt_action(work_ccb); 4701 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4702 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 4703 xpt_free_ccb(work_ccb); 4704 xpt_done(request_ccb); 4705 return; 4706 } 4707 4708 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4709 /* 4710 * Can't scan the bus on an adapter that 4711 * cannot perform the initiator role. 4712 */ 4713 request_ccb->ccb_h.status = CAM_REQ_CMP; 4714 xpt_free_ccb(work_ccb); 4715 xpt_done(request_ccb); 4716 return; 4717 } 4718 4719 /* Save some state for use while we probe for devices */ 4720 scan_info = (xpt_scan_bus_info *) 4721 malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_WAITOK); 4722 scan_info->request_ccb = request_ccb; 4723 scan_info->cpi = &work_ccb->cpi; 4724 4725 /* Cache on our stack so we can work asynchronously */ 4726 max_target = scan_info->cpi->max_target; 4727 initiator_id = scan_info->cpi->initiator_id; 4728 4729 /* 4730 * Don't count the initiator if the 4731 * initiator is addressable. 4732 */ 4733 scan_info->pending_count = max_target + 1; 4734 if (initiator_id <= max_target) 4735 scan_info->pending_count--; 4736 4737 for (i = 0; i <= max_target; i++) { 4738 cam_status status; 4739 if (i == initiator_id) 4740 continue; 4741 4742 status = xpt_create_path(&path, xpt_periph, 4743 request_ccb->ccb_h.path_id, 4744 i, 0); 4745 if (status != CAM_REQ_CMP) { 4746 printf("xpt_scan_bus: xpt_create_path failed" 4747 " with status %#x, bus scan halted\n", 4748 status); 4749 break; 4750 } 4751 work_ccb = xpt_alloc_ccb(); 4752 xpt_setup_ccb(&work_ccb->ccb_h, path, 4753 request_ccb->ccb_h.pinfo.priority); 4754 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4755 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4756 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 4757 work_ccb->crcn.flags = request_ccb->crcn.flags; 4758#if 0 4759 printf("xpt_scan_bus: probing %d:%d:%d\n", 4760 request_ccb->ccb_h.path_id, i, 0); 4761#endif 4762 xpt_action(work_ccb); 4763 } 4764 break; 4765 } 4766 case XPT_SCAN_LUN: 4767 { 4768 xpt_scan_bus_info *scan_info; 4769 path_id_t path_id; 4770 target_id_t target_id; 4771 lun_id_t lun_id; 4772 4773 /* Reuse the same CCB to query if a device was really found */ 4774 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 4775 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 4776 request_ccb->ccb_h.pinfo.priority); 4777 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 4778 4779 path_id = request_ccb->ccb_h.path_id; 4780 target_id = request_ccb->ccb_h.target_id; 4781 lun_id = request_ccb->ccb_h.target_lun; 4782 xpt_action(request_ccb); 4783 4784#if 0 4785 printf("xpt_scan_bus: got back probe from %d:%d:%d\n", 4786 path_id, target_id, lun_id); 4787#endif 4788 4789 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 4790 struct cam_ed *device; 4791 struct cam_et *target; 4792 int s; 4793 4794 /* 4795 * If we already probed lun 0 successfully, or 4796 * we have additional configured luns on this 4797 * target that might have "gone away", go onto 4798 * the next lun. 4799 */ 4800 target = request_ccb->ccb_h.path->target; 4801 s = splcam(); 4802 device = TAILQ_FIRST(&target->ed_entries); 4803 if (device != NULL) 4804 device = TAILQ_NEXT(device, links); 4805 splx(s); 4806 4807 if ((lun_id != 0) || (device != NULL)) { 4808 /* Try the next lun */ 4809 lun_id++; 4810 } 4811 } else { 4812 struct cam_ed *device; 4813 4814 device = request_ccb->ccb_h.path->device; 4815 4816 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 4817 /* Try the next lun */ 4818 lun_id++; 4819 } 4820 } 4821 4822 xpt_free_path(request_ccb->ccb_h.path); 4823 4824 /* Check Bounds */ 4825 if ((lun_id == request_ccb->ccb_h.target_lun) 4826 || lun_id > scan_info->cpi->max_lun) { 4827 /* We're done */ 4828 4829 xpt_free_ccb(request_ccb); 4830 scan_info->pending_count--; 4831 if (scan_info->pending_count == 0) { 4832 xpt_free_ccb((union ccb *)scan_info->cpi); 4833 request_ccb = scan_info->request_ccb; 4834 free(scan_info, M_TEMP); 4835 request_ccb->ccb_h.status = CAM_REQ_CMP; 4836 xpt_done(request_ccb); 4837 } 4838 } else { 4839 /* Try the next device */ 4840 struct cam_path *path; 4841 cam_status status; 4842 4843 path = request_ccb->ccb_h.path; 4844 status = xpt_create_path(&path, xpt_periph, 4845 path_id, target_id, lun_id); 4846 if (status != CAM_REQ_CMP) { 4847 printf("xpt_scan_bus: xpt_create_path failed " 4848 "with status %#x, halting LUN scan\n", 4849 status); 4850 xpt_free_ccb(request_ccb); 4851 scan_info->pending_count--; 4852 if (scan_info->pending_count == 0) { 4853 xpt_free_ccb( 4854 (union ccb *)scan_info->cpi); 4855 request_ccb = scan_info->request_ccb; 4856 free(scan_info, M_TEMP); 4857 request_ccb->ccb_h.status = CAM_REQ_CMP; 4858 xpt_done(request_ccb); 4859 break; 4860 } 4861 } 4862 xpt_setup_ccb(&request_ccb->ccb_h, path, 4863 request_ccb->ccb_h.pinfo.priority); 4864 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4865 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4866 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 4867 request_ccb->crcn.flags = 4868 scan_info->request_ccb->crcn.flags; 4869#if 0 4870 xpt_print_path(path); 4871 printf("xpt_scan bus probing\n"); 4872#endif 4873 xpt_action(request_ccb); 4874 } 4875 break; 4876 } 4877 default: 4878 break; 4879 } 4880} 4881 4882typedef enum { 4883 PROBE_TUR, 4884 PROBE_INQUIRY, 4885 PROBE_MODE_SENSE, 4886 PROBE_SERIAL_NUM, 4887 PROBE_TUR_FOR_NEGOTIATION 4888} probe_action; 4889 4890typedef enum { 4891 PROBE_INQUIRY_CKSUM = 0x01, 4892 PROBE_SERIAL_CKSUM = 0x02, 4893 PROBE_NO_ANNOUNCE = 0x04 4894} probe_flags; 4895 4896typedef struct { 4897 TAILQ_HEAD(, ccb_hdr) request_ccbs; 4898 probe_action action; 4899 union ccb saved_ccb; 4900 probe_flags flags; 4901 MD5_CTX context; 4902 u_int8_t digest[16]; 4903} probe_softc; 4904 4905static void 4906xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 4907 cam_flags flags, union ccb *request_ccb) 4908{ 4909 struct ccb_pathinq cpi; 4910 cam_status status; 4911 struct cam_path *new_path; 4912 struct cam_periph *old_periph; 4913 int s; 4914 4915 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4916 ("xpt_scan_lun\n")); 4917 4918 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 4919 cpi.ccb_h.func_code = XPT_PATH_INQ; 4920 xpt_action((union ccb *)&cpi); 4921 4922 if (cpi.ccb_h.status != CAM_REQ_CMP) { 4923 if (request_ccb != NULL) { 4924 request_ccb->ccb_h.status = cpi.ccb_h.status; 4925 xpt_done(request_ccb); 4926 } 4927 return; 4928 } 4929 4930 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4931 /* 4932 * Can't scan the bus on an adapter that 4933 * cannot perform the initiator role. 4934 */ 4935 if (request_ccb != NULL) { 4936 request_ccb->ccb_h.status = CAM_REQ_CMP; 4937 xpt_done(request_ccb); 4938 } 4939 return; 4940 } 4941 4942 if (request_ccb == NULL) { 4943 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_NOWAIT); 4944 if (request_ccb == NULL) { 4945 xpt_print_path(path); 4946 printf("xpt_scan_lun: can't allocate CCB, can't " 4947 "continue\n"); 4948 return; 4949 } 4950 new_path = malloc(sizeof(*new_path), M_TEMP, M_NOWAIT); 4951 if (new_path == NULL) { 4952 xpt_print_path(path); 4953 printf("xpt_scan_lun: can't allocate path, can't " 4954 "continue\n"); 4955 free(request_ccb, M_TEMP); 4956 return; 4957 } 4958 status = xpt_compile_path(new_path, xpt_periph, 4959 path->bus->path_id, 4960 path->target->target_id, 4961 path->device->lun_id); 4962 4963 if (status != CAM_REQ_CMP) { 4964 xpt_print_path(path); 4965 printf("xpt_scan_lun: can't compile path, can't " 4966 "continue\n"); 4967 free(request_ccb, M_TEMP); 4968 free(new_path, M_TEMP); 4969 return; 4970 } 4971 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 4972 request_ccb->ccb_h.cbfcnp = xptscandone; 4973 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4974 request_ccb->crcn.flags = flags; 4975 } 4976 4977 s = splsoftcam(); 4978 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 4979 probe_softc *softc; 4980 4981 softc = (probe_softc *)old_periph->softc; 4982 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 4983 periph_links.tqe); 4984 } else { 4985 status = cam_periph_alloc(proberegister, NULL, probecleanup, 4986 probestart, "probe", 4987 CAM_PERIPH_BIO, 4988 request_ccb->ccb_h.path, NULL, 0, 4989 request_ccb); 4990 4991 if (status != CAM_REQ_CMP) { 4992 xpt_print_path(path); 4993 printf("xpt_scan_lun: cam_alloc_periph returned an " 4994 "error, can't continue probe\n"); 4995 request_ccb->ccb_h.status = status; 4996 xpt_done(request_ccb); 4997 } 4998 } 4999 splx(s); 5000} 5001 5002static void 5003xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5004{ 5005 xpt_release_path(done_ccb->ccb_h.path); 5006 free(done_ccb->ccb_h.path, M_TEMP); 5007 free(done_ccb, M_TEMP); 5008} 5009 5010static cam_status 5011proberegister(struct cam_periph *periph, void *arg) 5012{ 5013 struct ccb_getdev *cgd; 5014 probe_softc *softc; 5015 union ccb *ccb; 5016 5017 cgd = (struct ccb_getdev *)arg; 5018 if (periph == NULL) { 5019 printf("proberegister: periph was NULL!!\n"); 5020 return(CAM_REQ_CMP_ERR); 5021 } 5022 5023 if (cgd == NULL) { 5024 printf("proberegister: no getdev CCB, can't register device\n"); 5025 return(CAM_REQ_CMP_ERR); 5026 } 5027 5028 softc = (probe_softc *)malloc(sizeof(*softc), M_TEMP, M_NOWAIT); 5029 5030 if (softc == NULL) { 5031 printf("proberegister: Unable to probe new device. " 5032 "Unable to allocate softc\n"); 5033 return(CAM_REQ_CMP_ERR); 5034 } 5035 ccb = (union ccb *)cgd; 5036 TAILQ_INIT(&softc->request_ccbs); 5037 TAILQ_INSERT_TAIL(&softc->request_ccbs, &ccb->ccb_h, periph_links.tqe); 5038 softc->flags = 0; 5039 periph->softc = softc; 5040 cam_periph_acquire(periph); 5041 probeschedule(periph); 5042 return(CAM_REQ_CMP); 5043} 5044 5045static void 5046probeschedule(struct cam_periph *periph) 5047{ 5048 union ccb *ccb; 5049 probe_softc *softc; 5050 5051 softc = (probe_softc *)periph->softc; 5052 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5053 5054 /* 5055 * If a device has gone away and another device, or the same one, 5056 * is back in the same place, it should have a unit attention 5057 * condition pending. It will not report the unit attention in 5058 * response to an inquiry, which may leave invalid transfer 5059 * negotiations in effect. The TUR will reveal the unit attention 5060 * condition. Only send the TUR for lun 0, since some devices 5061 * will get confused by commands other than inquiry to non-existent 5062 * luns. If you think a device has gone away start your scan from 5063 * lun 0. This will insure that any bogus transfer settings are 5064 * invalidated. 5065 */ 5066 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5067 && (ccb->ccb_h.target_lun == 0)) 5068 softc->action = PROBE_TUR; 5069 else 5070 softc->action = PROBE_INQUIRY; 5071 5072 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5073 softc->flags |= PROBE_NO_ANNOUNCE; 5074 else 5075 softc->flags &= ~PROBE_NO_ANNOUNCE; 5076 5077 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5078} 5079 5080static void 5081probestart(struct cam_periph *periph, union ccb *start_ccb) 5082{ 5083 /* Probe the device that our peripheral driver points to */ 5084 struct ccb_scsiio *csio; 5085 probe_softc *softc; 5086 5087 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5088 5089 softc = (probe_softc *)periph->softc; 5090 csio = &start_ccb->csio; 5091 5092 switch (softc->action) { 5093 case PROBE_TUR: 5094 case PROBE_TUR_FOR_NEGOTIATION: 5095 { 5096 scsi_test_unit_ready(csio, 5097 /*retries*/4, 5098 probedone, 5099 MSG_SIMPLE_Q_TAG, 5100 SSD_FULL_SIZE, 5101 /*timeout*/60000); 5102 break; 5103 } 5104 case PROBE_INQUIRY: 5105 { 5106 struct scsi_inquiry_data *inq_buf; 5107 5108 inq_buf = &periph->path->device->inq_data; 5109 /* 5110 * If the device is currently configured, we calculate an 5111 * MD5 checksum of the inquiry data, and if the serial number 5112 * length is greater than 0, add the serial number data 5113 * into the checksum as well. Once the inquiry and the 5114 * serial number check finish, we attempt to figure out 5115 * whether we still have the same device. 5116 */ 5117 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5118 5119 MD5Init(&softc->context); 5120 MD5Update(&softc->context, (unsigned char *)inq_buf, 5121 sizeof(struct scsi_inquiry_data)); 5122 softc->flags |= PROBE_INQUIRY_CKSUM; 5123 if (periph->path->device->serial_num_len > 0) { 5124 MD5Update(&softc->context, 5125 periph->path->device->serial_num, 5126 periph->path->device->serial_num_len); 5127 softc->flags |= PROBE_SERIAL_CKSUM; 5128 } 5129 MD5Final(softc->digest, &softc->context); 5130 } 5131 5132 scsi_inquiry(csio, 5133 /*retries*/4, 5134 probedone, 5135 MSG_SIMPLE_Q_TAG, 5136 (u_int8_t *)inq_buf, 5137 sizeof(*inq_buf), 5138 /*evpd*/FALSE, 5139 /*page_code*/0, 5140 SSD_MIN_SIZE, 5141 /*timeout*/60 * 1000); 5142 break; 5143 } 5144 case PROBE_MODE_SENSE: 5145 { 5146 void *mode_buf; 5147 int mode_buf_len; 5148 5149 mode_buf_len = sizeof(struct scsi_mode_header_6) 5150 + sizeof(struct scsi_mode_blk_desc) 5151 + sizeof(struct scsi_control_page); 5152 mode_buf = malloc(mode_buf_len, M_TEMP, M_NOWAIT); 5153 if (mode_buf != NULL) { 5154 scsi_mode_sense(csio, 5155 /*retries*/4, 5156 probedone, 5157 MSG_SIMPLE_Q_TAG, 5158 /*dbd*/FALSE, 5159 SMS_PAGE_CTRL_CURRENT, 5160 SMS_CONTROL_MODE_PAGE, 5161 mode_buf, 5162 mode_buf_len, 5163 SSD_FULL_SIZE, 5164 /*timeout*/60000); 5165 break; 5166 } 5167 xpt_print_path(periph->path); 5168 printf("Unable to mode sense control page - malloc failure\n"); 5169 softc->action = PROBE_SERIAL_NUM; 5170 /* FALLTHROUGH */ 5171 } 5172 case PROBE_SERIAL_NUM: 5173 { 5174 struct scsi_vpd_unit_serial_number *serial_buf; 5175 struct cam_ed* device; 5176 5177 serial_buf = NULL; 5178 device = periph->path->device; 5179 device->serial_num = NULL; 5180 device->serial_num_len = 0; 5181 5182 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) 5183 serial_buf = (struct scsi_vpd_unit_serial_number *) 5184 malloc(sizeof(*serial_buf), M_TEMP, M_NOWAIT); 5185 5186 if (serial_buf != NULL) { 5187 bzero(serial_buf, sizeof(*serial_buf)); 5188 scsi_inquiry(csio, 5189 /*retries*/4, 5190 probedone, 5191 MSG_SIMPLE_Q_TAG, 5192 (u_int8_t *)serial_buf, 5193 sizeof(*serial_buf), 5194 /*evpd*/TRUE, 5195 SVPD_UNIT_SERIAL_NUMBER, 5196 SSD_MIN_SIZE, 5197 /*timeout*/60 * 1000); 5198 break; 5199 } 5200 /* 5201 * We'll have to do without, let our probedone 5202 * routine finish up for us. 5203 */ 5204 start_ccb->csio.data_ptr = NULL; 5205 probedone(periph, start_ccb); 5206 return; 5207 } 5208 } 5209 xpt_action(start_ccb); 5210} 5211 5212static void 5213probedone(struct cam_periph *periph, union ccb *done_ccb) 5214{ 5215 probe_softc *softc; 5216 struct cam_path *path; 5217 u_int32_t priority; 5218 5219 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5220 5221 softc = (probe_softc *)periph->softc; 5222 path = done_ccb->ccb_h.path; 5223 priority = done_ccb->ccb_h.pinfo.priority; 5224 5225 switch (softc->action) { 5226 case PROBE_TUR: 5227 { 5228 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5229 5230 if (cam_periph_error(done_ccb, 0, 5231 SF_NO_PRINT, NULL) == ERESTART) 5232 return; 5233 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5234 /* Don't wedge the queue */ 5235 xpt_release_devq(done_ccb->ccb_h.path->device, 5236 /*run_queue*/TRUE); 5237 } 5238 softc->action = PROBE_INQUIRY; 5239 xpt_release_ccb(done_ccb); 5240 xpt_schedule(periph, priority); 5241 return; 5242 } 5243 case PROBE_INQUIRY: 5244 { 5245 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5246 struct scsi_inquiry_data *inq_buf; 5247 u_int8_t periph_qual; 5248 u_int8_t periph_dtype; 5249 5250 inq_buf = &path->device->inq_data; 5251 5252 periph_qual = SID_QUAL(inq_buf); 5253 periph_dtype = SID_TYPE(inq_buf); 5254 if (periph_dtype != T_NODEVICE) { 5255 switch(periph_qual) { 5256 case SID_QUAL_LU_CONNECTED: 5257 { 5258 xpt_find_quirk(path->device); 5259 5260 if ((inq_buf->flags & SID_CmdQue) != 0) 5261 softc->action = 5262 PROBE_MODE_SENSE; 5263 else 5264 softc->action = 5265 PROBE_SERIAL_NUM; 5266 5267 path->device->flags &= 5268 ~CAM_DEV_UNCONFIGURED; 5269 5270 xpt_release_ccb(done_ccb); 5271 xpt_schedule(periph, priority); 5272 return; 5273 } 5274 default: 5275 break; 5276 } 5277 } 5278 } else if (cam_periph_error(done_ccb, 0, 5279 done_ccb->ccb_h.target_lun > 0 5280 ? SF_RETRY_UA|SF_QUIET_IR 5281 : SF_RETRY_UA, 5282 &softc->saved_ccb) == ERESTART) { 5283 return; 5284 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5285 /* Don't wedge the queue */ 5286 xpt_release_devq(done_ccb->ccb_h.path->device, 5287 /*run_queue*/TRUE); 5288 } 5289 /* 5290 * If we get to this point, we got an error status back 5291 * from the inquiry and the error status doesn't require 5292 * automatically retrying the command. Therefore, the 5293 * inquiry failed. If we had inquiry information before 5294 * for this device, but this latest inquiry command failed, 5295 * the device has probably gone away. If this device isn't 5296 * already marked unconfigured, notify the peripheral 5297 * drivers that this device is no more. 5298 */ 5299 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5300 /* Send the async notification. */ 5301 xpt_async(AC_LOST_DEVICE, path, NULL); 5302 5303 xpt_release_ccb(done_ccb); 5304 break; 5305 } 5306 case PROBE_MODE_SENSE: 5307 { 5308 struct ccb_scsiio *csio; 5309 struct scsi_mode_header_6 *mode_hdr; 5310 5311 csio = &done_ccb->csio; 5312 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5313 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5314 struct scsi_control_page *page; 5315 u_int8_t *offset; 5316 5317 offset = ((u_int8_t *)&mode_hdr[1]) 5318 + mode_hdr->blk_desc_len; 5319 page = (struct scsi_control_page *)offset; 5320 path->device->queue_flags = page->queue_flags; 5321 } else if (cam_periph_error(done_ccb, 0, 5322 SF_RETRY_UA|SF_NO_PRINT, 5323 &softc->saved_ccb) == ERESTART) { 5324 return; 5325 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5326 /* Don't wedge the queue */ 5327 xpt_release_devq(done_ccb->ccb_h.path->device, 5328 /*run_queue*/TRUE); 5329 } 5330 xpt_release_ccb(done_ccb); 5331 free(mode_hdr, M_TEMP); 5332 softc->action = PROBE_SERIAL_NUM; 5333 xpt_schedule(periph, priority); 5334 return; 5335 } 5336 case PROBE_SERIAL_NUM: 5337 { 5338 struct ccb_scsiio *csio; 5339 struct scsi_vpd_unit_serial_number *serial_buf; 5340 u_int32_t priority; 5341 int changed; 5342 int have_serialnum; 5343 5344 changed = 1; 5345 have_serialnum = 0; 5346 csio = &done_ccb->csio; 5347 priority = done_ccb->ccb_h.pinfo.priority; 5348 serial_buf = 5349 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5350 5351 /* Clean up from previous instance of this device */ 5352 if (path->device->serial_num != NULL) { 5353 free(path->device->serial_num, M_DEVBUF); 5354 path->device->serial_num = NULL; 5355 path->device->serial_num_len = 0; 5356 } 5357 5358 if (serial_buf == NULL) { 5359 /* 5360 * Don't process the command as it was never sent 5361 */ 5362 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5363 && (serial_buf->length > 0)) { 5364 5365 have_serialnum = 1; 5366 path->device->serial_num = 5367 (u_int8_t *)malloc((serial_buf->length + 1), 5368 M_DEVBUF, M_NOWAIT); 5369 if (path->device->serial_num != NULL) { 5370 bcopy(serial_buf->serial_num, 5371 path->device->serial_num, 5372 serial_buf->length); 5373 path->device->serial_num_len = 5374 serial_buf->length; 5375 path->device->serial_num[serial_buf->length] 5376 = '\0'; 5377 } 5378 } else if (cam_periph_error(done_ccb, 0, 5379 SF_RETRY_UA|SF_NO_PRINT, 5380 &softc->saved_ccb) == ERESTART) { 5381 return; 5382 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5383 /* Don't wedge the queue */ 5384 xpt_release_devq(done_ccb->ccb_h.path->device, 5385 /*run_queue*/TRUE); 5386 } 5387 5388 /* 5389 * Let's see if we have seen this device before. 5390 */ 5391 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5392 MD5_CTX context; 5393 u_int8_t digest[16]; 5394 5395 MD5Init(&context); 5396 5397 MD5Update(&context, 5398 (unsigned char *)&path->device->inq_data, 5399 sizeof(struct scsi_inquiry_data)); 5400 5401 if (have_serialnum) 5402 MD5Update(&context, serial_buf->serial_num, 5403 serial_buf->length); 5404 5405 MD5Final(digest, &context); 5406 if (bcmp(softc->digest, digest, 16) == 0) 5407 changed = 0; 5408 5409 /* 5410 * XXX Do we need to do a TUR in order to ensure 5411 * that the device really hasn't changed??? 5412 */ 5413 if ((changed != 0) 5414 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5415 xpt_async(AC_LOST_DEVICE, path, NULL); 5416 } 5417 if (serial_buf != NULL) 5418 free(serial_buf, M_TEMP); 5419 5420 if (changed != 0) { 5421 /* 5422 * Now that we have all the necessary 5423 * information to safely perform transfer 5424 * negotiations... Controllers don't perform 5425 * any negotiation or tagged queuing until 5426 * after the first XPT_SET_TRAN_SETTINGS ccb is 5427 * received. So, on a new device, just retreive 5428 * the user settings, and set them as the current 5429 * settings to set the device up. 5430 */ 5431 done_ccb->ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5432 done_ccb->cts.flags = CCB_TRANS_USER_SETTINGS; 5433 xpt_action(done_ccb); 5434 done_ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5435 done_ccb->cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5436 done_ccb->cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5437 xpt_action(done_ccb); 5438 xpt_release_ccb(done_ccb); 5439 5440 /* 5441 * Perform a TUR to allow the controller to 5442 * perform any necessary transfer negotiation. 5443 */ 5444 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5445 xpt_schedule(periph, priority); 5446 return; 5447 } 5448 xpt_release_ccb(done_ccb); 5449 break; 5450 } 5451 case PROBE_TUR_FOR_NEGOTIATION: 5452 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5453 /* Don't wedge the queue */ 5454 xpt_release_devq(done_ccb->ccb_h.path->device, 5455 /*run_queue*/TRUE); 5456 } 5457 5458 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5459 5460 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5461 /* Inform the XPT that a new device has been found */ 5462 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5463 xpt_action(done_ccb); 5464 5465 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5466 } 5467 xpt_release_ccb(done_ccb); 5468 break; 5469 } 5470 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5471 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5472 done_ccb->ccb_h.status = CAM_REQ_CMP; 5473 xpt_done(done_ccb); 5474 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5475 cam_periph_invalidate(periph); 5476 cam_periph_release(periph); 5477 } else { 5478 probeschedule(periph); 5479 } 5480} 5481 5482static void 5483probecleanup(struct cam_periph *periph) 5484{ 5485 free(periph->softc, M_TEMP); 5486} 5487 5488static void 5489xpt_find_quirk(struct cam_ed *device) 5490{ 5491 caddr_t match; 5492 5493 match = cam_quirkmatch((caddr_t)&device->inq_data, 5494 (caddr_t)xpt_quirk_table, 5495 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5496 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5497 5498 if (match == NULL) 5499 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5500 5501 device->quirk = (struct xpt_quirk_entry *)match; 5502} 5503 5504static void 5505xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5506 int async_update) 5507{ 5508 struct cam_sim *sim; 5509 int qfrozen; 5510 5511 sim = cts->ccb_h.path->bus->sim; 5512 if (async_update == FALSE) { 5513 struct scsi_inquiry_data *inq_data; 5514 struct ccb_pathinq cpi; 5515 5516 if (device == NULL) { 5517 cts->ccb_h.status = CAM_PATH_INVALID; 5518 xpt_done((union ccb *)cts); 5519 return; 5520 } 5521 5522 /* 5523 * Perform sanity checking against what the 5524 * controller and device can do. 5525 */ 5526 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 5527 cpi.ccb_h.func_code = XPT_PATH_INQ; 5528 xpt_action((union ccb *)&cpi); 5529 5530 inq_data = &device->inq_data; 5531 if ((inq_data->flags & SID_Sync) == 0 5532 || (cpi.hba_inquiry & PI_SDTR_ABLE) == 0) { 5533 /* Force async */ 5534 cts->sync_period = 0; 5535 cts->sync_offset = 0; 5536 } 5537 5538 switch (cts->bus_width) { 5539 case MSG_EXT_WDTR_BUS_32_BIT: 5540 if ((inq_data->flags & SID_WBus32) != 0 5541 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 5542 break; 5543 /* Fall Through to 16-bit */ 5544 case MSG_EXT_WDTR_BUS_16_BIT: 5545 if ((inq_data->flags & SID_WBus16) != 0 5546 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 5547 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 5548 break; 5549 } 5550 /* Fall Through to 8-bit */ 5551 default: /* New bus width?? */ 5552 case MSG_EXT_WDTR_BUS_8_BIT: 5553 /* All targets can do this */ 5554 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 5555 break; 5556 } 5557 5558 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 5559 /* 5560 * Can't tag queue without disconnection. 5561 */ 5562 cts->flags &= ~CCB_TRANS_TAG_ENB; 5563 cts->valid |= CCB_TRANS_TQ_VALID; 5564 } 5565 5566 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 5567 || (inq_data->flags & SID_CmdQue) == 0 5568 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 5569 || (device->quirk->mintags == 0)) { 5570 /* 5571 * Can't tag on hardware that doesn't support, 5572 * doesn't have it enabled, or has broken tag support. 5573 */ 5574 cts->flags &= ~CCB_TRANS_TAG_ENB; 5575 } 5576 } 5577 5578 qfrozen = FALSE; 5579 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0 5580 && (async_update == FALSE)) { 5581 int device_tagenb; 5582 5583 /* 5584 * If we are transitioning from tags to no-tags or 5585 * vice-versa, we need to carefully freeze and restart 5586 * the queue so that we don't overlap tagged and non-tagged 5587 * commands. We also temporarily stop tags if there is 5588 * a change in transfer negotiation settings to allow 5589 * "tag-less" negotiation. 5590 */ 5591 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5592 || (device->inq_flags & SID_CmdQue) != 0) 5593 device_tagenb = TRUE; 5594 else 5595 device_tagenb = FALSE; 5596 5597 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 5598 && device_tagenb == FALSE) 5599 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 5600 && device_tagenb == TRUE)) { 5601 5602 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 5603 /* 5604 * Delay change to use tags until after a 5605 * few commands have gone to this device so 5606 * the controller has time to perform transfer 5607 * negotiations without tagged messages getting 5608 * in the way. 5609 */ 5610 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 5611 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 5612 } else { 5613 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 5614 qfrozen = TRUE; 5615 device->inq_flags &= ~SID_CmdQue; 5616 xpt_dev_ccbq_resize(cts->ccb_h.path, 5617 sim->max_dev_openings); 5618 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5619 device->tag_delay_count = 0; 5620 } 5621 } 5622 } 5623 5624 if (async_update == FALSE) { 5625 /* 5626 * If we are currently performing tagged transactions to 5627 * this device and want to change its negotiation parameters, 5628 * go non-tagged for a bit to give the controller a chance to 5629 * negotiate unhampered by tag messages. 5630 */ 5631 if ((device->inq_flags & SID_CmdQue) != 0 5632 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 5633 CCB_TRANS_SYNC_OFFSET_VALID| 5634 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 5635 xpt_toggle_tags(cts->ccb_h.path); 5636 5637 (*(sim->sim_action))(sim, (union ccb *)cts); 5638 } 5639 5640 if (qfrozen) { 5641 struct ccb_relsim crs; 5642 5643 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 5644 /*priority*/1); 5645 crs.ccb_h.func_code = XPT_REL_SIMQ; 5646 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5647 crs.openings 5648 = crs.release_timeout 5649 = crs.qfrozen_cnt 5650 = 0; 5651 xpt_action((union ccb *)&crs); 5652 } 5653} 5654 5655static void 5656xpt_toggle_tags(struct cam_path *path) 5657{ 5658 /* 5659 * Give controllers a chance to renegotiate 5660 * before starting tag operations. We 5661 * "toggle" tagged queuing off then on 5662 * which causes the tag enable command delay 5663 * counter to come into effect. 5664 */ 5665 if ((path->device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5666 || (path->device->inq_flags & SID_CmdQue) != 0) { 5667 struct ccb_trans_settings cts; 5668 5669 xpt_setup_ccb(&cts.ccb_h, path, 1); 5670 cts.flags = 0; 5671 cts.valid = CCB_TRANS_TQ_VALID; 5672 xpt_set_transfer_settings(&cts, path->device, 5673 /*async_update*/TRUE); 5674 cts.flags = CCB_TRANS_TAG_ENB; 5675 xpt_set_transfer_settings(&cts, path->device, 5676 /*async_update*/TRUE); 5677 } 5678} 5679 5680static void 5681xpt_start_tags(struct cam_path *path) 5682{ 5683 struct ccb_relsim crs; 5684 struct cam_ed *device; 5685 struct cam_sim *sim; 5686 int newopenings; 5687 5688 device = path->device; 5689 sim = path->bus->sim; 5690 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5691 xpt_freeze_devq(path, /*count*/1); 5692 device->inq_flags |= SID_CmdQue; 5693 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 5694 xpt_dev_ccbq_resize(path, newopenings); 5695 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 5696 crs.ccb_h.func_code = XPT_REL_SIMQ; 5697 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5698 crs.openings 5699 = crs.release_timeout 5700 = crs.qfrozen_cnt 5701 = 0; 5702 xpt_action((union ccb *)&crs); 5703} 5704 5705static int busses_to_config; 5706 5707static int 5708xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 5709{ 5710 if (bus->path_id != CAM_XPT_PATH_ID) 5711 busses_to_config++; 5712 5713 return(1); 5714} 5715 5716static int 5717xptconfigfunc(struct cam_eb *bus, void *arg) 5718{ 5719 struct cam_path *path; 5720 union ccb *work_ccb; 5721 5722 if (bus->path_id != CAM_XPT_PATH_ID) { 5723 cam_status status; 5724 5725 work_ccb = xpt_alloc_ccb(); 5726 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 5727 CAM_TARGET_WILDCARD, 5728 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 5729 printf("xptconfigfunc: xpt_create_path failed with " 5730 "status %#x for bus %d\n", status, bus->path_id); 5731 printf("xptconfigfunc: halting bus configuration\n"); 5732 xpt_free_ccb(work_ccb); 5733 busses_to_config--; 5734 xpt_finishconfig(xpt_periph, NULL); 5735 return(0); 5736 } 5737 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5738 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5739 xpt_action(work_ccb); 5740 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5741 printf("xptconfigfunc: CPI failed on bus %d " 5742 "with status %d\n", bus->path_id, 5743 work_ccb->ccb_h.status); 5744 xpt_finishconfig(xpt_periph, work_ccb); 5745 return(1); 5746 } 5747 5748 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0) { 5749 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5750 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5751 work_ccb->ccb_h.cbfcnp = NULL; 5752 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 5753 ("Resetting Bus\n")); 5754 xpt_action(work_ccb); 5755 xpt_finishconfig(xpt_periph, work_ccb); 5756 } else { 5757 /* Act as though we performed a successful BUS RESET */ 5758 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5759 xpt_finishconfig(xpt_periph, work_ccb); 5760 } 5761 } 5762 5763 return(1); 5764} 5765 5766static void 5767xpt_config(void *arg) 5768{ 5769 /* Now that interrupts are enabled, go find our devices */ 5770 5771#ifdef CAMDEBUG 5772 /* Setup debugging flags and path */ 5773#ifdef CAM_DEBUG_FLAGS 5774 cam_dflags = CAM_DEBUG_FLAGS; 5775#else /* !CAM_DEBUG_FLAGS */ 5776 cam_dflags = CAM_DEBUG_NONE; 5777#endif /* CAM_DEBUG_FLAGS */ 5778#ifdef CAM_DEBUG_BUS 5779 if (cam_dflags != CAM_DEBUG_NONE) { 5780 if (xpt_create_path(&cam_dpath, xpt_periph, 5781 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 5782 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 5783 printf("xpt_config: xpt_create_path() failed for debug" 5784 " target %d:%d:%d, debugging disabled\n", 5785 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 5786 cam_dflags = CAM_DEBUG_NONE; 5787 } 5788 } else 5789 cam_dpath = NULL; 5790#else /* !CAM_DEBUG_BUS */ 5791 cam_dpath = NULL; 5792#endif /* CAM_DEBUG_BUS */ 5793#endif /* CAMDEBUG */ 5794 5795 /* 5796 * Scan all installed busses. 5797 */ 5798 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 5799 5800 if (busses_to_config == 0) { 5801 /* Call manually because we don't have any busses */ 5802 xpt_finishconfig(xpt_periph, NULL); 5803 } else { 5804 if (SCSI_DELAY >= 2000) { 5805 printf("Waiting %d seconds for SCSI " 5806 "devices to settle\n", SCSI_DELAY/1000); 5807 } 5808 xpt_for_all_busses(xptconfigfunc, NULL); 5809 } 5810} 5811 5812/* 5813 * If the given device only has one peripheral attached to it, and if that 5814 * peripheral is the passthrough driver, announce it. This insures that the 5815 * user sees some sort of announcement for every peripheral in their system. 5816 */ 5817static int 5818xptpassannouncefunc(struct cam_ed *device, void *arg) 5819{ 5820 struct cam_periph *periph; 5821 int i; 5822 5823 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 5824 periph = SLIST_NEXT(periph, periph_links), i++); 5825 5826 periph = SLIST_FIRST(&device->periphs); 5827 if ((i == 1) 5828 && (strncmp(periph->periph_name, "pass", 4) == 0)) 5829 xpt_announce_periph(periph, NULL); 5830 5831 return(1); 5832} 5833 5834static void 5835xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 5836{ 5837 struct periph_driver **p_drv; 5838 int i; 5839 5840 if (done_ccb != NULL) { 5841 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5842 ("xpt_finishconfig\n")); 5843 switch(done_ccb->ccb_h.func_code) { 5844 case XPT_RESET_BUS: 5845 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 5846 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 5847 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 5848 xpt_action(done_ccb); 5849 return; 5850 } 5851 /* FALLTHROUGH */ 5852 case XPT_SCAN_BUS: 5853 default: 5854 xpt_free_path(done_ccb->ccb_h.path); 5855 busses_to_config--; 5856 break; 5857 } 5858 } 5859 5860 if (busses_to_config == 0) { 5861 /* Register all the peripheral drivers */ 5862 /* XXX This will have to change when we have LKMs */ 5863 p_drv = (struct periph_driver **)periphdriver_set.ls_items; 5864 for (i = 0; p_drv[i] != NULL; i++) { 5865 (*p_drv[i]->init)(); 5866 } 5867 5868 /* 5869 * Check for devices with no "standard" peripheral driver 5870 * attached. For any devices like that, announce the 5871 * passthrough driver so the user will see something. 5872 */ 5873 xpt_for_all_devices(xptpassannouncefunc, NULL); 5874 5875 /* Release our hook so that the boot can continue. */ 5876 config_intrhook_disestablish(xpt_config_hook); 5877 } 5878 if (done_ccb != NULL) 5879 xpt_free_ccb(done_ccb); 5880} 5881 5882static void 5883xptaction(struct cam_sim *sim, union ccb *work_ccb) 5884{ 5885 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 5886 5887 switch (work_ccb->ccb_h.func_code) { 5888 /* Common cases first */ 5889 case XPT_PATH_INQ: /* Path routing inquiry */ 5890 { 5891 struct ccb_pathinq *cpi; 5892 5893 cpi = &work_ccb->cpi; 5894 cpi->version_num = 1; /* XXX??? */ 5895 cpi->hba_inquiry = 0; 5896 cpi->target_sprt = 0; 5897 cpi->hba_misc = 0; 5898 cpi->hba_eng_cnt = 0; 5899 cpi->max_target = 0; 5900 cpi->max_lun = 0; 5901 cpi->initiator_id = 0; 5902 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 5903 strncpy(cpi->hba_vid, "", HBA_IDLEN); 5904 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 5905 cpi->unit_number = sim->unit_number; 5906 cpi->bus_id = sim->bus_id; 5907 cpi->ccb_h.status = CAM_REQ_CMP; 5908 xpt_done(work_ccb); 5909 break; 5910 } 5911 default: 5912 work_ccb->ccb_h.status = CAM_REQ_INVALID; 5913 xpt_done(work_ccb); 5914 break; 5915 } 5916} 5917 5918/* 5919 * Should only be called by the machine interrupt dispatch routines, 5920 * so put these prototypes here instead of in the header. 5921 */ 5922 5923static void 5924swi_camnet(void) 5925{ 5926 camisr(&cam_netq); 5927} 5928 5929static void 5930swi_cambio(void) 5931{ 5932 camisr(&cam_bioq); 5933} 5934 5935static void 5936camisr(cam_isrq_t *queue) 5937{ 5938 int s; 5939 struct ccb_hdr *ccb_h; 5940 5941 s = splcam(); 5942 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 5943 int runq; 5944 5945 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 5946 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 5947 splx(s); 5948 5949 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 5950 ("camisr")); 5951 5952 runq = FALSE; 5953 5954 if (ccb_h->flags & CAM_HIGH_POWER) { 5955 struct highpowerlist *hphead; 5956 struct cam_ed *device; 5957 union ccb *send_ccb; 5958 5959 hphead = &highpowerq; 5960 5961 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 5962 5963 /* 5964 * Increment the count since this command is done. 5965 */ 5966 num_highpower++; 5967 5968 /* 5969 * Any high powered commands queued up? 5970 */ 5971 if (send_ccb != NULL) { 5972 device = send_ccb->ccb_h.path->device; 5973 5974 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 5975 5976 xpt_release_devq(send_ccb->ccb_h.path->device, 5977 TRUE); 5978 } 5979 } 5980 if ((ccb_h->func_code != XPT_ACCEPT_TARGET_IO) 5981 && (ccb_h->func_code != XPT_IMMED_NOTIFY) 5982 && (ccb_h->func_code != XPT_SCAN_LUN) 5983 && (ccb_h->func_code != XPT_SCAN_BUS)) { 5984 struct cam_ed *dev; 5985 5986 dev = ccb_h->path->device; 5987 5988 s = splcam(); 5989 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 5990 5991 ccb_h->path->bus->sim->devq->send_active--; 5992 ccb_h->path->bus->sim->devq->send_openings++; 5993 splx(s); 5994 5995 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 5996 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 5997 && (dev->ccbq.dev_active == 0))) { 5998 5999 xpt_release_devq(ccb_h->path->device, 6000 /*run_queue*/TRUE); 6001 } 6002 6003 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6004 && (--dev->tag_delay_count == 0)) 6005 xpt_start_tags(ccb_h->path); 6006 6007 if ((dev->ccbq.queue.entries > 0) 6008 && (dev->qfrozen_cnt == 0) 6009 && (device_is_send_queued(dev) == 0)) { 6010 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6011 dev); 6012 } 6013 } 6014 6015 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6016 xpt_release_simq(ccb_h->path->bus->sim, 6017 /*run_queue*/TRUE); 6018 } else if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6019 && (ccb_h->status & CAM_DEV_QFRZN)) { 6020 xpt_release_devq(ccb_h->path->device, 6021 /*run_queue*/TRUE); 6022 ccb_h->status &= ~CAM_DEV_QFRZN; 6023 } else if (runq) { 6024 xpt_run_dev_sendq(ccb_h->path->bus); 6025 } 6026 6027 /* Call the peripheral driver's callback */ 6028 (*ccb_h->cbfcnp)(ccb_h->path->periph, 6029 (union ccb *)ccb_h); 6030 6031 /* Raise IPL for while test */ 6032 s = splcam(); 6033 } 6034 splx(s); 6035} 6036