1 /* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ 30 * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.26 2005/07/17 03:49:50 dillon Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/fcntl.h> 40 #include <sys/md5.h> 41 #include <sys/devicestat.h> 42 #include <sys/interrupt.h> 43 #include <sys/bus.h> 44 #include <sys/thread.h> 45 #include <sys/thread2.h> 46 47 #include <machine/clock.h> 48 #include <machine/ipl.h> 49 50 #include "cam.h" 51 #include "cam_ccb.h" 52 #include "cam_periph.h" 53 #include "cam_sim.h" 54 #include "cam_xpt.h" 55 #include "cam_xpt_sim.h" 56 #include "cam_xpt_periph.h" 57 #include "cam_debug.h" 58 59 #include "scsi/scsi_all.h" 60 #include "scsi/scsi_message.h" 61 #include "scsi/scsi_pass.h" 62 #include "opt_cam.h" 63 64 /* Datastructures internal to the xpt layer */ 65 66 /* 67 * Definition of an async handler callback block. These are used to add 68 * SIMs and peripherals to the async callback lists. 69 */ 70 struct async_node { 71 SLIST_ENTRY(async_node) links; 72 u_int32_t event_enable; /* Async Event enables */ 73 void (*callback)(void *arg, u_int32_t code, 74 struct cam_path *path, void *args); 75 void *callback_arg; 76 }; 77 78 SLIST_HEAD(async_list, async_node); 79 SLIST_HEAD(periph_list, cam_periph); 80 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 81 82 /* 83 * This is the maximum number of high powered commands (e.g. start unit) 84 * that can be outstanding at a particular time. 85 */ 86 #ifndef CAM_MAX_HIGHPOWER 87 #define CAM_MAX_HIGHPOWER 4 88 #endif 89 90 /* number of high powered commands that can go through right now */ 91 static int num_highpower = CAM_MAX_HIGHPOWER; 92 93 /* 94 * Structure for queueing a device in a run queue. 95 * There is one run queue for allocating new ccbs, 96 * and another for sending ccbs to the controller. 97 */ 98 struct cam_ed_qinfo { 99 cam_pinfo pinfo; 100 struct cam_ed *device; 101 }; 102 103 /* 104 * The CAM EDT (Existing Device Table) contains the device information for 105 * all devices for all busses in the system. The table contains a 106 * cam_ed structure for each device on the bus. 107 */ 108 struct cam_ed { 109 TAILQ_ENTRY(cam_ed) links; 110 struct cam_ed_qinfo alloc_ccb_entry; 111 struct cam_ed_qinfo send_ccb_entry; 112 struct cam_et *target; 113 lun_id_t lun_id; 114 struct camq drvq; /* 115 * Queue of type drivers wanting to do 116 * work on this device. 117 */ 118 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 119 struct async_list asyncs; /* Async callback info for this B/T/L */ 120 struct periph_list periphs; /* All attached devices */ 121 u_int generation; /* Generation number */ 122 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 123 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 124 /* Storage for the inquiry data */ 125 struct scsi_inquiry_data inq_data; 126 u_int8_t inq_flags; /* 127 * Current settings for inquiry flags. 128 * This allows us to override settings 129 * like disconnection and tagged 130 * queuing for a device. 131 */ 132 u_int8_t queue_flags; /* Queue flags from the control page */ 133 u_int8_t serial_num_len; 134 u_int8_t *serial_num; 135 u_int32_t qfrozen_cnt; 136 u_int32_t flags; 137 #define CAM_DEV_UNCONFIGURED 0x01 138 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 139 #define CAM_DEV_REL_ON_COMPLETE 0x04 140 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 141 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 142 #define CAM_DEV_TAG_AFTER_COUNT 0x20 143 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 144 u_int32_t tag_delay_count; 145 #define CAM_TAG_DELAY_COUNT 5 146 u_int32_t refcount; 147 struct callout c_handle; 148 }; 149 150 /* 151 * Each target is represented by an ET (Existing Target). These 152 * entries are created when a target is successfully probed with an 153 * identify, and removed when a device fails to respond after a number 154 * of retries, or a bus rescan finds the device missing. 155 */ 156 struct cam_et { 157 TAILQ_HEAD(, cam_ed) ed_entries; 158 TAILQ_ENTRY(cam_et) links; 159 struct cam_eb *bus; 160 target_id_t target_id; 161 u_int32_t refcount; 162 u_int generation; 163 struct timeval last_reset; /* uptime of last reset */ 164 }; 165 166 /* 167 * Each bus is represented by an EB (Existing Bus). These entries 168 * are created by calls to xpt_bus_register and deleted by calls to 169 * xpt_bus_deregister. 170 */ 171 struct cam_eb { 172 TAILQ_HEAD(, cam_et) et_entries; 173 TAILQ_ENTRY(cam_eb) links; 174 path_id_t path_id; 175 struct cam_sim *sim; 176 struct timeval last_reset; /* uptime of last reset */ 177 u_int32_t flags; 178 #define CAM_EB_RUNQ_SCHEDULED 0x01 179 u_int32_t refcount; 180 u_int generation; 181 }; 182 183 struct cam_path { 184 struct cam_periph *periph; 185 struct cam_eb *bus; 186 struct cam_et *target; 187 struct cam_ed *device; 188 }; 189 190 struct xpt_quirk_entry { 191 struct scsi_inquiry_pattern inq_pat; 192 u_int8_t quirks; 193 #define CAM_QUIRK_NOLUNS 0x01 194 #define CAM_QUIRK_NOSERIAL 0x02 195 #define CAM_QUIRK_HILUNS 0x04 196 u_int mintags; 197 u_int maxtags; 198 }; 199 #define CAM_SCSI2_MAXLUN 8 200 201 typedef enum { 202 XPT_FLAG_OPEN = 0x01 203 } xpt_flags; 204 205 struct xpt_softc { 206 xpt_flags flags; 207 u_int32_t generation; 208 }; 209 210 static const char quantum[] = "QUANTUM"; 211 static const char sony[] = "SONY"; 212 static const char west_digital[] = "WDIGTL"; 213 static const char samsung[] = "SAMSUNG"; 214 static const char seagate[] = "SEAGATE"; 215 static const char microp[] = "MICROP"; 216 217 static struct xpt_quirk_entry xpt_quirk_table[] = 218 { 219 { 220 /* Reports QUEUE FULL for temporary resource shortages */ 221 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 222 /*quirks*/0, /*mintags*/24, /*maxtags*/32 223 }, 224 { 225 /* Reports QUEUE FULL for temporary resource shortages */ 226 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 227 /*quirks*/0, /*mintags*/24, /*maxtags*/32 228 }, 229 { 230 /* Reports QUEUE FULL for temporary resource shortages */ 231 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 232 /*quirks*/0, /*mintags*/24, /*maxtags*/32 233 }, 234 { 235 /* Broken tagged queuing drive */ 236 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 237 /*quirks*/0, /*mintags*/0, /*maxtags*/0 238 }, 239 { 240 /* Broken tagged queuing drive */ 241 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 242 /*quirks*/0, /*mintags*/0, /*maxtags*/0 243 }, 244 { 245 /* Broken tagged queuing drive */ 246 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 247 /*quirks*/0, /*mintags*/0, /*maxtags*/0 248 }, 249 { 250 /* 251 * Unfortunately, the Quantum Atlas III has the same 252 * problem as the Atlas II drives above. 253 * Reported by: "Johan Granlund" <johan@granlund.nu> 254 * 255 * For future reference, the drive with the problem was: 256 * QUANTUM QM39100TD-SW N1B0 257 * 258 * It's possible that Quantum will fix the problem in later 259 * firmware revisions. If that happens, the quirk entry 260 * will need to be made specific to the firmware revisions 261 * with the problem. 262 * 263 */ 264 /* Reports QUEUE FULL for temporary resource shortages */ 265 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 266 /*quirks*/0, /*mintags*/24, /*maxtags*/32 267 }, 268 { 269 /* 270 * 18 Gig Atlas III, same problem as the 9G version. 271 * Reported by: Andre Albsmeier 272 * <andre.albsmeier@mchp.siemens.de> 273 * 274 * For future reference, the drive with the problem was: 275 * QUANTUM QM318000TD-S N491 276 */ 277 /* Reports QUEUE FULL for temporary resource shortages */ 278 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 279 /*quirks*/0, /*mintags*/24, /*maxtags*/32 280 }, 281 { 282 /* 283 * Broken tagged queuing drive 284 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 285 * and: Martin Renters <martin@tdc.on.ca> 286 */ 287 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 288 /*quirks*/0, /*mintags*/0, /*maxtags*/0 289 }, 290 /* 291 * The Seagate Medalist Pro drives have very poor write 292 * performance with anything more than 2 tags. 293 * 294 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 295 * Drive: <SEAGATE ST36530N 1444> 296 * 297 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 298 * Drive: <SEAGATE ST34520W 1281> 299 * 300 * No one has actually reported that the 9G version 301 * (ST39140*) of the Medalist Pro has the same problem, but 302 * we're assuming that it does because the 4G and 6.5G 303 * versions of the drive are broken. 304 */ 305 { 306 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 307 /*quirks*/0, /*mintags*/2, /*maxtags*/2 308 }, 309 { 310 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 311 /*quirks*/0, /*mintags*/2, /*maxtags*/2 312 }, 313 { 314 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 315 /*quirks*/0, /*mintags*/2, /*maxtags*/2 316 }, 317 { 318 /* 319 * Slow when tagged queueing is enabled. Write performance 320 * steadily drops off with more and more concurrent 321 * transactions. Best sequential write performance with 322 * tagged queueing turned off and write caching turned on. 323 * 324 * PR: kern/10398 325 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 326 * Drive: DCAS-34330 w/ "S65A" firmware. 327 * 328 * The drive with the problem had the "S65A" firmware 329 * revision, and has also been reported (by Stephen J. 330 * Roznowski <sjr@home.net>) for a drive with the "S61A" 331 * firmware revision. 332 * 333 * Although no one has reported problems with the 2 gig 334 * version of the DCAS drive, the assumption is that it 335 * has the same problems as the 4 gig version. Therefore 336 * this quirk entries disables tagged queueing for all 337 * DCAS drives. 338 */ 339 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 340 /*quirks*/0, /*mintags*/0, /*maxtags*/0 341 }, 342 { 343 /* Broken tagged queuing drive */ 344 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 345 /*quirks*/0, /*mintags*/0, /*maxtags*/0 346 }, 347 { 348 /* Broken tagged queuing drive */ 349 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 350 /*quirks*/0, /*mintags*/0, /*maxtags*/0 351 }, 352 { 353 /* 354 * Broken tagged queuing drive. 355 * Submitted by: 356 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 357 * in PR kern/9535 358 */ 359 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 360 /*quirks*/0, /*mintags*/0, /*maxtags*/0 361 }, 362 { 363 /* 364 * Slow when tagged queueing is enabled. (1.5MB/sec versus 365 * 8MB/sec.) 366 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 367 * Best performance with these drives is achieved with 368 * tagged queueing turned off, and write caching turned on. 369 */ 370 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 371 /*quirks*/0, /*mintags*/0, /*maxtags*/0 372 }, 373 { 374 /* 375 * Slow when tagged queueing is enabled. (1.5MB/sec versus 376 * 8MB/sec.) 377 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 378 * Best performance with these drives is achieved with 379 * tagged queueing turned off, and write caching turned on. 380 */ 381 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 382 /*quirks*/0, /*mintags*/0, /*maxtags*/0 383 }, 384 { 385 /* 386 * Doesn't handle queue full condition correctly, 387 * so we need to limit maxtags to what the device 388 * can handle instead of determining this automatically. 389 */ 390 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 391 /*quirks*/0, /*mintags*/2, /*maxtags*/32 392 }, 393 { 394 /* Really only one LUN */ 395 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 396 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 397 }, 398 { 399 /* I can't believe we need a quirk for DPT volumes. */ 400 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 401 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 402 /*mintags*/0, /*maxtags*/255 403 }, 404 { 405 /* 406 * Many Sony CDROM drives don't like multi-LUN probing. 407 */ 408 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 409 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 410 }, 411 { 412 /* 413 * This drive doesn't like multiple LUN probing. 414 * Submitted by: Parag Patel <parag@cgt.com> 415 */ 416 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 417 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 418 }, 419 { 420 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 421 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 422 }, 423 { 424 /* 425 * The 8200 doesn't like multi-lun probing, and probably 426 * don't like serial number requests either. 427 */ 428 { 429 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 430 "EXB-8200*", "*" 431 }, 432 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 433 }, 434 { 435 /* 436 * Let's try the same as above, but for a drive that says 437 * it's an IPL-6860 but is actually an EXB 8200. 438 */ 439 { 440 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 441 "IPL-6860*", "*" 442 }, 443 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 444 }, 445 { 446 /* 447 * These Hitachi drives don't like multi-lun probing. 448 * The PR submitter has a DK319H, but says that the Linux 449 * kernel has a similar work-around for the DK312 and DK314, 450 * so all DK31* drives are quirked here. 451 * PR: misc/18793 452 * Submitted by: Paul Haddad <paul@pth.com> 453 */ 454 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 455 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 456 }, 457 { 458 /* 459 * This old revision of the TDC3600 is also SCSI-1, and 460 * hangs upon serial number probing. 461 */ 462 { 463 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 464 " TDC 3600", "U07:" 465 }, 466 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 467 }, 468 { 469 /* 470 * Would repond to all LUNs if asked for. 471 */ 472 { 473 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 474 "CP150", "*" 475 }, 476 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 477 }, 478 { 479 /* 480 * Would repond to all LUNs if asked for. 481 */ 482 { 483 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 484 "96X2*", "*" 485 }, 486 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 487 }, 488 { 489 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 490 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 491 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 492 }, 493 { 494 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 495 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 496 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 497 }, 498 { 499 /* TeraSolutions special settings for TRC-22 RAID */ 500 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 501 /*quirks*/0, /*mintags*/55, /*maxtags*/255 502 }, 503 { 504 /* Veritas Storage Appliance */ 505 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 506 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 507 }, 508 { 509 /* 510 * Would respond to all LUNs. Device type and removable 511 * flag are jumper-selectable. 512 */ 513 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 514 "Tahiti 1", "*" 515 }, 516 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 517 }, 518 { 519 /* Default tagged queuing parameters for all devices */ 520 { 521 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 522 /*vendor*/"*", /*product*/"*", /*revision*/"*" 523 }, 524 /*quirks*/0, /*mintags*/2, /*maxtags*/255 525 }, 526 }; 527 528 static const int xpt_quirk_table_size = 529 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 530 531 typedef enum { 532 DM_RET_COPY = 0x01, 533 DM_RET_FLAG_MASK = 0x0f, 534 DM_RET_NONE = 0x00, 535 DM_RET_STOP = 0x10, 536 DM_RET_DESCEND = 0x20, 537 DM_RET_ERROR = 0x30, 538 DM_RET_ACTION_MASK = 0xf0 539 } dev_match_ret; 540 541 typedef enum { 542 XPT_DEPTH_BUS, 543 XPT_DEPTH_TARGET, 544 XPT_DEPTH_DEVICE, 545 XPT_DEPTH_PERIPH 546 } xpt_traverse_depth; 547 548 struct xpt_traverse_config { 549 xpt_traverse_depth depth; 550 void *tr_func; 551 void *tr_arg; 552 }; 553 554 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 555 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 556 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 557 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 558 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 559 560 /* Transport layer configuration information */ 561 static struct xpt_softc xsoftc; 562 563 /* Queues for our software interrupt handler */ 564 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 565 static cam_isrq_t cam_bioq; 566 static cam_isrq_t cam_netq; 567 568 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 569 static SLIST_HEAD(,ccb_hdr) ccb_freeq; 570 static u_int xpt_max_ccbs; /* 571 * Maximum size of ccb pool. Modified as 572 * devices are added/removed or have their 573 * opening counts changed. 574 */ 575 static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 576 577 struct cam_periph *xpt_periph; 578 579 static periph_init_t xpt_periph_init; 580 581 static periph_init_t probe_periph_init; 582 583 static struct periph_driver xpt_driver = 584 { 585 xpt_periph_init, "xpt", 586 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 587 }; 588 589 static struct periph_driver probe_driver = 590 { 591 probe_periph_init, "probe", 592 TAILQ_HEAD_INITIALIZER(probe_driver.units) 593 }; 594 595 DATA_SET(periphdriver_set, xpt_driver); 596 DATA_SET(periphdriver_set, probe_driver); 597 598 #define XPT_CDEV_MAJOR 104 599 600 static d_open_t xptopen; 601 static d_close_t xptclose; 602 static d_ioctl_t xptioctl; 603 604 static struct cdevsw xpt_cdevsw = { 605 /* name */ "xpt", 606 /* maj */ XPT_CDEV_MAJOR, 607 /* flags */ 0, 608 /* port */ NULL, 609 /* clone */ NULL, 610 611 /* open */ xptopen, 612 /* close */ xptclose, 613 /* read */ noread, 614 /* write */ nowrite, 615 /* ioctl */ xptioctl, 616 /* poll */ nopoll, 617 /* mmap */ nommap, 618 /* strategy */ nostrategy, 619 /* dump */ nodump, 620 /* psize */ nopsize 621 }; 622 623 static struct intr_config_hook *xpt_config_hook; 624 625 /* Registered busses */ 626 static TAILQ_HEAD(,cam_eb) xpt_busses; 627 static u_int bus_generation; 628 629 /* Storage for debugging datastructures */ 630 #ifdef CAMDEBUG 631 struct cam_path *cam_dpath; 632 u_int32_t cam_dflags; 633 u_int32_t cam_debug_delay; 634 #endif 635 636 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 637 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 638 #endif 639 640 /* 641 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 642 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 643 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 644 */ 645 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 646 || defined(CAM_DEBUG_LUN) 647 #ifdef CAMDEBUG 648 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 649 || !defined(CAM_DEBUG_LUN) 650 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 651 and CAM_DEBUG_LUN" 652 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 653 #else /* !CAMDEBUG */ 654 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 655 #endif /* CAMDEBUG */ 656 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 657 658 /* Our boot-time initialization hook */ 659 static void xpt_init(void *); 660 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL); 661 662 static cam_status xpt_compile_path(struct cam_path *new_path, 663 struct cam_periph *perph, 664 path_id_t path_id, 665 target_id_t target_id, 666 lun_id_t lun_id); 667 668 static void xpt_release_path(struct cam_path *path); 669 670 static void xpt_async_bcast(struct async_list *async_head, 671 u_int32_t async_code, 672 struct cam_path *path, 673 void *async_arg); 674 static void xpt_dev_async(u_int32_t async_code, 675 struct cam_eb *bus, 676 struct cam_et *target, 677 struct cam_ed *device, 678 void *async_arg); 679 static path_id_t xptnextfreepathid(void); 680 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 681 static union ccb *xpt_get_ccb(struct cam_ed *device); 682 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 683 u_int32_t new_priority); 684 static void xpt_run_dev_allocq(struct cam_eb *bus); 685 static void xpt_run_dev_sendq(struct cam_eb *bus); 686 static timeout_t xpt_release_devq_timeout; 687 static void xpt_release_bus(struct cam_eb *bus); 688 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 689 int run_queue); 690 static struct cam_et* 691 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 692 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 693 static struct cam_ed* 694 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 695 lun_id_t lun_id); 696 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 697 struct cam_ed *device); 698 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 699 static struct cam_eb* 700 xpt_find_bus(path_id_t path_id); 701 static struct cam_et* 702 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 703 static struct cam_ed* 704 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 705 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 706 static void xpt_scan_lun(struct cam_periph *periph, 707 struct cam_path *path, cam_flags flags, 708 union ccb *ccb); 709 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 710 static xpt_busfunc_t xptconfigbuscountfunc; 711 static xpt_busfunc_t xptconfigfunc; 712 static void xpt_config(void *arg); 713 static xpt_devicefunc_t xptpassannouncefunc; 714 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 715 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 716 static void xptpoll(struct cam_sim *sim); 717 static inthand2_t swi_camnet; 718 static inthand2_t swi_cambio; 719 static void camisr(cam_isrq_t *queue); 720 #if 0 721 static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 722 static void xptasync(struct cam_periph *periph, 723 u_int32_t code, cam_path *path); 724 #endif 725 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 726 int num_patterns, struct cam_eb *bus); 727 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 728 int num_patterns, struct cam_ed *device); 729 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 730 int num_patterns, 731 struct cam_periph *periph); 732 static xpt_busfunc_t xptedtbusfunc; 733 static xpt_targetfunc_t xptedttargetfunc; 734 static xpt_devicefunc_t xptedtdevicefunc; 735 static xpt_periphfunc_t xptedtperiphfunc; 736 static xpt_pdrvfunc_t xptplistpdrvfunc; 737 static xpt_periphfunc_t xptplistperiphfunc; 738 static int xptedtmatch(struct ccb_dev_match *cdm); 739 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 740 static int xptbustraverse(struct cam_eb *start_bus, 741 xpt_busfunc_t *tr_func, void *arg); 742 static int xpttargettraverse(struct cam_eb *bus, 743 struct cam_et *start_target, 744 xpt_targetfunc_t *tr_func, void *arg); 745 static int xptdevicetraverse(struct cam_et *target, 746 struct cam_ed *start_device, 747 xpt_devicefunc_t *tr_func, void *arg); 748 static int xptperiphtraverse(struct cam_ed *device, 749 struct cam_periph *start_periph, 750 xpt_periphfunc_t *tr_func, void *arg); 751 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 752 xpt_pdrvfunc_t *tr_func, void *arg); 753 static int xptpdperiphtraverse(struct periph_driver **pdrv, 754 struct cam_periph *start_periph, 755 xpt_periphfunc_t *tr_func, 756 void *arg); 757 static xpt_busfunc_t xptdefbusfunc; 758 static xpt_targetfunc_t xptdeftargetfunc; 759 static xpt_devicefunc_t xptdefdevicefunc; 760 static xpt_periphfunc_t xptdefperiphfunc; 761 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 762 #ifdef notusedyet 763 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 764 void *arg); 765 #endif 766 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 767 void *arg); 768 #ifdef notusedyet 769 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 770 void *arg); 771 #endif 772 static xpt_devicefunc_t xptsetasyncfunc; 773 static xpt_busfunc_t xptsetasyncbusfunc; 774 static cam_status xptregister(struct cam_periph *periph, 775 void *arg); 776 static cam_status proberegister(struct cam_periph *periph, 777 void *arg); 778 static void probeschedule(struct cam_periph *probe_periph); 779 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 780 static void proberequestdefaultnegotiation(struct cam_periph *periph); 781 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 782 static void probecleanup(struct cam_periph *periph); 783 static void xpt_find_quirk(struct cam_ed *device); 784 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 785 struct cam_ed *device, 786 int async_update); 787 static void xpt_toggle_tags(struct cam_path *path); 788 static void xpt_start_tags(struct cam_path *path); 789 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 790 struct cam_ed *dev); 791 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 792 struct cam_ed *dev); 793 static __inline int periph_is_queued(struct cam_periph *periph); 794 static __inline int device_is_alloc_queued(struct cam_ed *device); 795 static __inline int device_is_send_queued(struct cam_ed *device); 796 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 797 798 static __inline int 799 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 800 { 801 int retval; 802 803 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 804 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 805 cam_ccbq_resize(&dev->ccbq, 806 dev->ccbq.dev_openings 807 + dev->ccbq.dev_active); 808 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 809 } 810 /* 811 * The priority of a device waiting for CCB resources 812 * is that of the the highest priority peripheral driver 813 * enqueued. 814 */ 815 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 816 &dev->alloc_ccb_entry.pinfo, 817 CAMQ_GET_HEAD(&dev->drvq)->priority); 818 } else { 819 retval = 0; 820 } 821 822 return (retval); 823 } 824 825 static __inline int 826 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 827 { 828 int retval; 829 830 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 831 /* 832 * The priority of a device waiting for controller 833 * resources is that of the the highest priority CCB 834 * enqueued. 835 */ 836 retval = 837 xpt_schedule_dev(&bus->sim->devq->send_queue, 838 &dev->send_ccb_entry.pinfo, 839 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 840 } else { 841 retval = 0; 842 } 843 return (retval); 844 } 845 846 static __inline int 847 periph_is_queued(struct cam_periph *periph) 848 { 849 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 850 } 851 852 static __inline int 853 device_is_alloc_queued(struct cam_ed *device) 854 { 855 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 856 } 857 858 static __inline int 859 device_is_send_queued(struct cam_ed *device) 860 { 861 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 862 } 863 864 static __inline int 865 dev_allocq_is_runnable(struct cam_devq *devq) 866 { 867 /* 868 * Have work to do. 869 * Have space to do more work. 870 * Allowed to do work. 871 */ 872 return ((devq->alloc_queue.qfrozen_cnt == 0) 873 && (devq->alloc_queue.entries > 0) 874 && (devq->alloc_openings > 0)); 875 } 876 877 static void 878 xpt_periph_init() 879 { 880 cdevsw_add(&xpt_cdevsw, 0, 0); 881 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 882 } 883 884 static void 885 probe_periph_init() 886 { 887 } 888 889 890 static void 891 xptdone(struct cam_periph *periph, union ccb *done_ccb) 892 { 893 /* Caller will release the CCB */ 894 wakeup(&done_ccb->ccb_h.cbfcnp); 895 } 896 897 static int 898 xptopen(dev_t dev, int flags, int fmt, struct thread *td) 899 { 900 int unit; 901 902 unit = minor(dev) & 0xff; 903 904 /* 905 * Only allow read-write access. 906 */ 907 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 908 return(EPERM); 909 910 /* 911 * We don't allow nonblocking access. 912 */ 913 if ((flags & O_NONBLOCK) != 0) { 914 printf("xpt%d: can't do nonblocking access\n", unit); 915 return(ENODEV); 916 } 917 918 /* 919 * We only have one transport layer right now. If someone accesses 920 * us via something other than minor number 1, point out their 921 * mistake. 922 */ 923 if (unit != 0) { 924 printf("xptopen: got invalid xpt unit %d\n", unit); 925 return(ENXIO); 926 } 927 928 /* Mark ourselves open */ 929 xsoftc.flags |= XPT_FLAG_OPEN; 930 931 return(0); 932 } 933 934 static int 935 xptclose(dev_t dev, int flag, int fmt, struct thread *td) 936 { 937 int unit; 938 939 unit = minor(dev) & 0xff; 940 941 /* 942 * We only have one transport layer right now. If someone accesses 943 * us via something other than minor number 1, point out their 944 * mistake. 945 */ 946 if (unit != 0) { 947 printf("xptclose: got invalid xpt unit %d\n", unit); 948 return(ENXIO); 949 } 950 951 /* Mark ourselves closed */ 952 xsoftc.flags &= ~XPT_FLAG_OPEN; 953 954 return(0); 955 } 956 957 static int 958 xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 959 { 960 int unit, error; 961 962 error = 0; 963 unit = minor(dev) & 0xff; 964 965 /* 966 * We only have one transport layer right now. If someone accesses 967 * us via something other than minor number 1, point out their 968 * mistake. 969 */ 970 if (unit != 0) { 971 printf("xptioctl: got invalid xpt unit %d\n", unit); 972 return(ENXIO); 973 } 974 975 switch(cmd) { 976 /* 977 * For the transport layer CAMIOCOMMAND ioctl, we really only want 978 * to accept CCB types that don't quite make sense to send through a 979 * passthrough driver. 980 */ 981 case CAMIOCOMMAND: { 982 union ccb *ccb; 983 union ccb *inccb; 984 985 inccb = (union ccb *)addr; 986 987 switch(inccb->ccb_h.func_code) { 988 case XPT_SCAN_BUS: 989 case XPT_RESET_BUS: 990 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 991 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 992 error = EINVAL; 993 break; 994 } 995 /* FALLTHROUGH */ 996 case XPT_PATH_INQ: 997 case XPT_ENG_INQ: 998 case XPT_SCAN_LUN: 999 1000 ccb = xpt_alloc_ccb(); 1001 1002 /* 1003 * Create a path using the bus, target, and lun the 1004 * user passed in. 1005 */ 1006 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1007 inccb->ccb_h.path_id, 1008 inccb->ccb_h.target_id, 1009 inccb->ccb_h.target_lun) != 1010 CAM_REQ_CMP){ 1011 error = EINVAL; 1012 xpt_free_ccb(ccb); 1013 break; 1014 } 1015 /* Ensure all of our fields are correct */ 1016 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1017 inccb->ccb_h.pinfo.priority); 1018 xpt_merge_ccb(ccb, inccb); 1019 ccb->ccb_h.cbfcnp = xptdone; 1020 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1021 bcopy(ccb, inccb, sizeof(union ccb)); 1022 xpt_free_path(ccb->ccb_h.path); 1023 xpt_free_ccb(ccb); 1024 break; 1025 1026 case XPT_DEBUG: { 1027 union ccb ccb; 1028 1029 /* 1030 * This is an immediate CCB, so it's okay to 1031 * allocate it on the stack. 1032 */ 1033 1034 /* 1035 * Create a path using the bus, target, and lun the 1036 * user passed in. 1037 */ 1038 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1039 inccb->ccb_h.path_id, 1040 inccb->ccb_h.target_id, 1041 inccb->ccb_h.target_lun) != 1042 CAM_REQ_CMP){ 1043 error = EINVAL; 1044 break; 1045 } 1046 /* Ensure all of our fields are correct */ 1047 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1048 inccb->ccb_h.pinfo.priority); 1049 xpt_merge_ccb(&ccb, inccb); 1050 ccb.ccb_h.cbfcnp = xptdone; 1051 xpt_action(&ccb); 1052 bcopy(&ccb, inccb, sizeof(union ccb)); 1053 xpt_free_path(ccb.ccb_h.path); 1054 break; 1055 1056 } 1057 case XPT_DEV_MATCH: { 1058 struct cam_periph_map_info mapinfo; 1059 struct cam_path *old_path; 1060 1061 /* 1062 * We can't deal with physical addresses for this 1063 * type of transaction. 1064 */ 1065 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1066 error = EINVAL; 1067 break; 1068 } 1069 1070 /* 1071 * Save this in case the caller had it set to 1072 * something in particular. 1073 */ 1074 old_path = inccb->ccb_h.path; 1075 1076 /* 1077 * We really don't need a path for the matching 1078 * code. The path is needed because of the 1079 * debugging statements in xpt_action(). They 1080 * assume that the CCB has a valid path. 1081 */ 1082 inccb->ccb_h.path = xpt_periph->path; 1083 1084 bzero(&mapinfo, sizeof(mapinfo)); 1085 1086 /* 1087 * Map the pattern and match buffers into kernel 1088 * virtual address space. 1089 */ 1090 error = cam_periph_mapmem(inccb, &mapinfo); 1091 1092 if (error) { 1093 inccb->ccb_h.path = old_path; 1094 break; 1095 } 1096 1097 /* 1098 * This is an immediate CCB, we can send it on directly. 1099 */ 1100 xpt_action(inccb); 1101 1102 /* 1103 * Map the buffers back into user space. 1104 */ 1105 cam_periph_unmapmem(inccb, &mapinfo); 1106 1107 inccb->ccb_h.path = old_path; 1108 1109 error = 0; 1110 break; 1111 } 1112 default: 1113 error = ENOTSUP; 1114 break; 1115 } 1116 break; 1117 } 1118 /* 1119 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1120 * with the periphal driver name and unit name filled in. The other 1121 * fields don't really matter as input. The passthrough driver name 1122 * ("pass"), and unit number are passed back in the ccb. The current 1123 * device generation number, and the index into the device peripheral 1124 * driver list, and the status are also passed back. Note that 1125 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1126 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1127 * (or rather should be) impossible for the device peripheral driver 1128 * list to change since we look at the whole thing in one pass, and 1129 * we do it within a critical section. 1130 * 1131 */ 1132 case CAMGETPASSTHRU: { 1133 union ccb *ccb; 1134 struct cam_periph *periph; 1135 struct periph_driver **p_drv; 1136 char *name; 1137 int unit; 1138 int cur_generation; 1139 int base_periph_found; 1140 int splbreaknum; 1141 1142 ccb = (union ccb *)addr; 1143 unit = ccb->cgdl.unit_number; 1144 name = ccb->cgdl.periph_name; 1145 /* 1146 * Every 100 devices, we want to call splz() to check for 1147 * and allow the software interrupt handler a chance to run. 1148 * 1149 * Most systems won't run into this check, but this should 1150 * avoid starvation in the software interrupt handler in 1151 * large systems. 1152 */ 1153 splbreaknum = 100; 1154 1155 ccb = (union ccb *)addr; 1156 1157 base_periph_found = 0; 1158 1159 /* 1160 * Sanity check -- make sure we don't get a null peripheral 1161 * driver name. 1162 */ 1163 if (*ccb->cgdl.periph_name == '\0') { 1164 error = EINVAL; 1165 break; 1166 } 1167 1168 /* Keep the list from changing while we traverse it */ 1169 crit_enter(); 1170 ptstartover: 1171 cur_generation = xsoftc.generation; 1172 1173 /* first find our driver in the list of drivers */ 1174 SET_FOREACH(p_drv, periphdriver_set) { 1175 if (strcmp((*p_drv)->driver_name, name) == 0) 1176 break; 1177 } 1178 1179 if (*p_drv == NULL) { 1180 crit_exit(); 1181 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1182 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1183 *ccb->cgdl.periph_name = '\0'; 1184 ccb->cgdl.unit_number = 0; 1185 error = ENOENT; 1186 break; 1187 } 1188 1189 /* 1190 * Run through every peripheral instance of this driver 1191 * and check to see whether it matches the unit passed 1192 * in by the user. If it does, get out of the loops and 1193 * find the passthrough driver associated with that 1194 * peripheral driver. 1195 */ 1196 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 1197 periph = TAILQ_NEXT(periph, unit_links)) { 1198 1199 if (periph->unit_number == unit) { 1200 break; 1201 } else if (--splbreaknum == 0) { 1202 splz(); 1203 splbreaknum = 100; 1204 if (cur_generation != xsoftc.generation) 1205 goto ptstartover; 1206 } 1207 } 1208 /* 1209 * If we found the peripheral driver that the user passed 1210 * in, go through all of the peripheral drivers for that 1211 * particular device and look for a passthrough driver. 1212 */ 1213 if (periph != NULL) { 1214 struct cam_ed *device; 1215 int i; 1216 1217 base_periph_found = 1; 1218 device = periph->path->device; 1219 for (i = 0, periph = device->periphs.slh_first; 1220 periph != NULL; 1221 periph = periph->periph_links.sle_next, i++) { 1222 /* 1223 * Check to see whether we have a 1224 * passthrough device or not. 1225 */ 1226 if (strcmp(periph->periph_name, "pass") == 0) { 1227 /* 1228 * Fill in the getdevlist fields. 1229 */ 1230 strcpy(ccb->cgdl.periph_name, 1231 periph->periph_name); 1232 ccb->cgdl.unit_number = 1233 periph->unit_number; 1234 if (periph->periph_links.sle_next) 1235 ccb->cgdl.status = 1236 CAM_GDEVLIST_MORE_DEVS; 1237 else 1238 ccb->cgdl.status = 1239 CAM_GDEVLIST_LAST_DEVICE; 1240 ccb->cgdl.generation = 1241 device->generation; 1242 ccb->cgdl.index = i; 1243 /* 1244 * Fill in some CCB header fields 1245 * that the user may want. 1246 */ 1247 ccb->ccb_h.path_id = 1248 periph->path->bus->path_id; 1249 ccb->ccb_h.target_id = 1250 periph->path->target->target_id; 1251 ccb->ccb_h.target_lun = 1252 periph->path->device->lun_id; 1253 ccb->ccb_h.status = CAM_REQ_CMP; 1254 break; 1255 } 1256 } 1257 } 1258 1259 /* 1260 * If the periph is null here, one of two things has 1261 * happened. The first possibility is that we couldn't 1262 * find the unit number of the particular peripheral driver 1263 * that the user is asking about. e.g. the user asks for 1264 * the passthrough driver for "da11". We find the list of 1265 * "da" peripherals all right, but there is no unit 11. 1266 * The other possibility is that we went through the list 1267 * of peripheral drivers attached to the device structure, 1268 * but didn't find one with the name "pass". Either way, 1269 * we return ENOENT, since we couldn't find something. 1270 */ 1271 if (periph == NULL) { 1272 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1273 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1274 *ccb->cgdl.periph_name = '\0'; 1275 ccb->cgdl.unit_number = 0; 1276 error = ENOENT; 1277 /* 1278 * It is unfortunate that this is even necessary, 1279 * but there are many, many clueless users out there. 1280 * If this is true, the user is looking for the 1281 * passthrough driver, but doesn't have one in his 1282 * kernel. 1283 */ 1284 if (base_periph_found == 1) { 1285 printf("xptioctl: pass driver is not in the " 1286 "kernel\n"); 1287 printf("xptioctl: put \"device pass0\" in " 1288 "your kernel config file\n"); 1289 } 1290 } 1291 crit_exit(); 1292 break; 1293 } 1294 default: 1295 error = ENOTTY; 1296 break; 1297 } 1298 1299 return(error); 1300 } 1301 1302 /* Functions accessed by the peripheral drivers */ 1303 static void 1304 xpt_init(dummy) 1305 void *dummy; 1306 { 1307 struct cam_sim *xpt_sim; 1308 struct cam_path *path; 1309 struct cam_devq *devq; 1310 cam_status status; 1311 1312 TAILQ_INIT(&xpt_busses); 1313 TAILQ_INIT(&cam_bioq); 1314 TAILQ_INIT(&cam_netq); 1315 SLIST_INIT(&ccb_freeq); 1316 STAILQ_INIT(&highpowerq); 1317 1318 /* 1319 * The xpt layer is, itself, the equivelent of a SIM. 1320 * Allow 16 ccbs in the ccb pool for it. This should 1321 * give decent parallelism when we probe busses and 1322 * perform other XPT functions. 1323 */ 1324 devq = cam_simq_alloc(16); 1325 xpt_sim = cam_sim_alloc(xptaction, 1326 xptpoll, 1327 "xpt", 1328 /*softc*/NULL, 1329 /*unit*/0, 1330 /*max_dev_transactions*/0, 1331 /*max_tagged_dev_transactions*/0, 1332 devq); 1333 cam_simq_release(devq); 1334 xpt_max_ccbs = 16; 1335 1336 xpt_bus_register(xpt_sim, /*bus #*/0); 1337 1338 /* 1339 * Looking at the XPT from the SIM layer, the XPT is 1340 * the equivelent of a peripheral driver. Allocate 1341 * a peripheral driver entry for us. 1342 */ 1343 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1344 CAM_TARGET_WILDCARD, 1345 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1346 printf("xpt_init: xpt_create_path failed with status %#x," 1347 " failing attach\n", status); 1348 return; 1349 } 1350 1351 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1352 path, NULL, 0, NULL); 1353 xpt_free_path(path); 1354 1355 xpt_sim->softc = xpt_periph; 1356 1357 /* 1358 * Register a callback for when interrupts are enabled. 1359 */ 1360 xpt_config_hook = malloc(sizeof(struct intr_config_hook), 1361 M_TEMP, M_INTWAIT | M_ZERO); 1362 xpt_config_hook->ich_func = xpt_config; 1363 xpt_config_hook->ich_desc = "xpt"; 1364 if (config_intrhook_establish(xpt_config_hook) != 0) { 1365 free (xpt_config_hook, M_TEMP); 1366 printf("xpt_init: config_intrhook_establish failed " 1367 "- failing attach\n"); 1368 } 1369 1370 /* Install our software interrupt handlers */ 1371 register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet"); 1372 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio"); 1373 } 1374 1375 static cam_status 1376 xptregister(struct cam_periph *periph, void *arg) 1377 { 1378 if (periph == NULL) { 1379 printf("xptregister: periph was NULL!!\n"); 1380 return(CAM_REQ_CMP_ERR); 1381 } 1382 1383 periph->softc = NULL; 1384 1385 xpt_periph = periph; 1386 1387 return(CAM_REQ_CMP); 1388 } 1389 1390 int32_t 1391 xpt_add_periph(struct cam_periph *periph) 1392 { 1393 struct cam_ed *device; 1394 int32_t status; 1395 struct periph_list *periph_head; 1396 1397 device = periph->path->device; 1398 1399 periph_head = &device->periphs; 1400 1401 status = CAM_REQ_CMP; 1402 1403 if (device != NULL) { 1404 /* 1405 * Make room for this peripheral 1406 * so it will fit in the queue 1407 * when it's scheduled to run 1408 */ 1409 crit_enter(); 1410 status = camq_resize(&device->drvq, 1411 device->drvq.array_size + 1); 1412 1413 device->generation++; 1414 1415 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1416 crit_exit(); 1417 } 1418 1419 xsoftc.generation++; 1420 1421 return (status); 1422 } 1423 1424 void 1425 xpt_remove_periph(struct cam_periph *periph) 1426 { 1427 struct cam_ed *device; 1428 1429 device = periph->path->device; 1430 1431 if (device != NULL) { 1432 struct periph_list *periph_head; 1433 1434 periph_head = &device->periphs; 1435 1436 /* Release the slot for this peripheral */ 1437 crit_enter(); 1438 camq_resize(&device->drvq, device->drvq.array_size - 1); 1439 1440 device->generation++; 1441 1442 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1443 crit_exit(); 1444 } 1445 1446 xsoftc.generation++; 1447 1448 } 1449 1450 void 1451 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1452 { 1453 u_int mb; 1454 struct cam_path *path; 1455 struct ccb_trans_settings cts; 1456 1457 path = periph->path; 1458 /* 1459 * To ensure that this is printed in one piece, 1460 * mask out CAM interrupts. 1461 */ 1462 crit_enter(); 1463 printf("%s%d at %s%d bus %d target %d lun %d\n", 1464 periph->periph_name, periph->unit_number, 1465 path->bus->sim->sim_name, 1466 path->bus->sim->unit_number, 1467 path->bus->sim->bus_id, 1468 path->target->target_id, 1469 path->device->lun_id); 1470 printf("%s%d: ", periph->periph_name, periph->unit_number); 1471 scsi_print_inquiry(&path->device->inq_data); 1472 if ((bootverbose) 1473 && (path->device->serial_num_len > 0)) { 1474 /* Don't wrap the screen - print only the first 60 chars */ 1475 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1476 periph->unit_number, path->device->serial_num); 1477 } 1478 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1479 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1480 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1481 xpt_action((union ccb*)&cts); 1482 if (cts.ccb_h.status == CAM_REQ_CMP) { 1483 u_int speed; 1484 u_int freq; 1485 1486 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1487 && cts.sync_offset != 0) { 1488 freq = scsi_calc_syncsrate(cts.sync_period); 1489 speed = freq; 1490 } else { 1491 struct ccb_pathinq cpi; 1492 1493 /* Ask the SIM for its base transfer speed */ 1494 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1495 cpi.ccb_h.func_code = XPT_PATH_INQ; 1496 xpt_action((union ccb *)&cpi); 1497 1498 speed = cpi.base_transfer_speed; 1499 freq = 0; 1500 } 1501 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1502 speed *= (0x01 << cts.bus_width); 1503 mb = speed / 1000; 1504 if (mb > 0) 1505 printf("%s%d: %d.%03dMB/s transfers", 1506 periph->periph_name, periph->unit_number, 1507 mb, speed % 1000); 1508 else 1509 printf("%s%d: %dKB/s transfers", periph->periph_name, 1510 periph->unit_number, speed); 1511 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1512 && cts.sync_offset != 0) { 1513 printf(" (%d.%03dMHz, offset %d", freq / 1000, 1514 freq % 1000, cts.sync_offset); 1515 } 1516 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1517 && cts.bus_width > 0) { 1518 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1519 && cts.sync_offset != 0) { 1520 printf(", "); 1521 } else { 1522 printf(" ("); 1523 } 1524 printf("%dbit)", 8 * (0x01 << cts.bus_width)); 1525 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1526 && cts.sync_offset != 0) { 1527 printf(")"); 1528 } 1529 1530 if (path->device->inq_flags & SID_CmdQue 1531 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1532 printf(", Tagged Queueing Enabled"); 1533 } 1534 1535 printf("\n"); 1536 } else if (path->device->inq_flags & SID_CmdQue 1537 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1538 printf("%s%d: Tagged Queueing Enabled\n", 1539 periph->periph_name, periph->unit_number); 1540 } 1541 1542 /* 1543 * We only want to print the caller's announce string if they've 1544 * passed one in.. 1545 */ 1546 if (announce_string != NULL) 1547 printf("%s%d: %s\n", periph->periph_name, 1548 periph->unit_number, announce_string); 1549 crit_exit(); 1550 } 1551 1552 1553 static dev_match_ret 1554 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns, 1555 struct cam_eb *bus) 1556 { 1557 dev_match_ret retval; 1558 int i; 1559 1560 retval = DM_RET_NONE; 1561 1562 /* 1563 * If we aren't given something to match against, that's an error. 1564 */ 1565 if (bus == NULL) 1566 return(DM_RET_ERROR); 1567 1568 /* 1569 * If there are no match entries, then this bus matches no 1570 * matter what. 1571 */ 1572 if ((patterns == NULL) || (num_patterns == 0)) 1573 return(DM_RET_DESCEND | DM_RET_COPY); 1574 1575 for (i = 0; i < num_patterns; i++) { 1576 struct bus_match_pattern *cur_pattern; 1577 1578 /* 1579 * If the pattern in question isn't for a bus node, we 1580 * aren't interested. However, we do indicate to the 1581 * calling routine that we should continue descending the 1582 * tree, since the user wants to match against lower-level 1583 * EDT elements. 1584 */ 1585 if (patterns[i].type != DEV_MATCH_BUS) { 1586 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1587 retval |= DM_RET_DESCEND; 1588 continue; 1589 } 1590 1591 cur_pattern = &patterns[i].pattern.bus_pattern; 1592 1593 /* 1594 * If they want to match any bus node, we give them any 1595 * device node. 1596 */ 1597 if (cur_pattern->flags == BUS_MATCH_ANY) { 1598 /* set the copy flag */ 1599 retval |= DM_RET_COPY; 1600 1601 /* 1602 * If we've already decided on an action, go ahead 1603 * and return. 1604 */ 1605 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1606 return(retval); 1607 } 1608 1609 /* 1610 * Not sure why someone would do this... 1611 */ 1612 if (cur_pattern->flags == BUS_MATCH_NONE) 1613 continue; 1614 1615 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1616 && (cur_pattern->path_id != bus->path_id)) 1617 continue; 1618 1619 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1620 && (cur_pattern->bus_id != bus->sim->bus_id)) 1621 continue; 1622 1623 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1624 && (cur_pattern->unit_number != bus->sim->unit_number)) 1625 continue; 1626 1627 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1628 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1629 DEV_IDLEN) != 0)) 1630 continue; 1631 1632 /* 1633 * If we get to this point, the user definitely wants 1634 * information on this bus. So tell the caller to copy the 1635 * data out. 1636 */ 1637 retval |= DM_RET_COPY; 1638 1639 /* 1640 * If the return action has been set to descend, then we 1641 * know that we've already seen a non-bus matching 1642 * expression, therefore we need to further descend the tree. 1643 * This won't change by continuing around the loop, so we 1644 * go ahead and return. If we haven't seen a non-bus 1645 * matching expression, we keep going around the loop until 1646 * we exhaust the matching expressions. We'll set the stop 1647 * flag once we fall out of the loop. 1648 */ 1649 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1650 return(retval); 1651 } 1652 1653 /* 1654 * If the return action hasn't been set to descend yet, that means 1655 * we haven't seen anything other than bus matching patterns. So 1656 * tell the caller to stop descending the tree -- the user doesn't 1657 * want to match against lower level tree elements. 1658 */ 1659 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1660 retval |= DM_RET_STOP; 1661 1662 return(retval); 1663 } 1664 1665 static dev_match_ret 1666 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns, 1667 struct cam_ed *device) 1668 { 1669 dev_match_ret retval; 1670 int i; 1671 1672 retval = DM_RET_NONE; 1673 1674 /* 1675 * If we aren't given something to match against, that's an error. 1676 */ 1677 if (device == NULL) 1678 return(DM_RET_ERROR); 1679 1680 /* 1681 * If there are no match entries, then this device matches no 1682 * matter what. 1683 */ 1684 if ((patterns == NULL) || (patterns == 0)) 1685 return(DM_RET_DESCEND | DM_RET_COPY); 1686 1687 for (i = 0; i < num_patterns; i++) { 1688 struct device_match_pattern *cur_pattern; 1689 1690 /* 1691 * If the pattern in question isn't for a device node, we 1692 * aren't interested. 1693 */ 1694 if (patterns[i].type != DEV_MATCH_DEVICE) { 1695 if ((patterns[i].type == DEV_MATCH_PERIPH) 1696 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1697 retval |= DM_RET_DESCEND; 1698 continue; 1699 } 1700 1701 cur_pattern = &patterns[i].pattern.device_pattern; 1702 1703 /* 1704 * If they want to match any device node, we give them any 1705 * device node. 1706 */ 1707 if (cur_pattern->flags == DEV_MATCH_ANY) { 1708 /* set the copy flag */ 1709 retval |= DM_RET_COPY; 1710 1711 1712 /* 1713 * If we've already decided on an action, go ahead 1714 * and return. 1715 */ 1716 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1717 return(retval); 1718 } 1719 1720 /* 1721 * Not sure why someone would do this... 1722 */ 1723 if (cur_pattern->flags == DEV_MATCH_NONE) 1724 continue; 1725 1726 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1727 && (cur_pattern->path_id != device->target->bus->path_id)) 1728 continue; 1729 1730 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1731 && (cur_pattern->target_id != device->target->target_id)) 1732 continue; 1733 1734 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1735 && (cur_pattern->target_lun != device->lun_id)) 1736 continue; 1737 1738 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1739 && (cam_quirkmatch((caddr_t)&device->inq_data, 1740 (caddr_t)&cur_pattern->inq_pat, 1741 1, sizeof(cur_pattern->inq_pat), 1742 scsi_static_inquiry_match) == NULL)) 1743 continue; 1744 1745 /* 1746 * If we get to this point, the user definitely wants 1747 * information on this device. So tell the caller to copy 1748 * the data out. 1749 */ 1750 retval |= DM_RET_COPY; 1751 1752 /* 1753 * If the return action has been set to descend, then we 1754 * know that we've already seen a peripheral matching 1755 * expression, therefore we need to further descend the tree. 1756 * This won't change by continuing around the loop, so we 1757 * go ahead and return. If we haven't seen a peripheral 1758 * matching expression, we keep going around the loop until 1759 * we exhaust the matching expressions. We'll set the stop 1760 * flag once we fall out of the loop. 1761 */ 1762 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1763 return(retval); 1764 } 1765 1766 /* 1767 * If the return action hasn't been set to descend yet, that means 1768 * we haven't seen any peripheral matching patterns. So tell the 1769 * caller to stop descending the tree -- the user doesn't want to 1770 * match against lower level tree elements. 1771 */ 1772 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1773 retval |= DM_RET_STOP; 1774 1775 return(retval); 1776 } 1777 1778 /* 1779 * Match a single peripheral against any number of match patterns. 1780 */ 1781 static dev_match_ret 1782 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns, 1783 struct cam_periph *periph) 1784 { 1785 dev_match_ret retval; 1786 int i; 1787 1788 /* 1789 * If we aren't given something to match against, that's an error. 1790 */ 1791 if (periph == NULL) 1792 return(DM_RET_ERROR); 1793 1794 /* 1795 * If there are no match entries, then this peripheral matches no 1796 * matter what. 1797 */ 1798 if ((patterns == NULL) || (num_patterns == 0)) 1799 return(DM_RET_STOP | DM_RET_COPY); 1800 1801 /* 1802 * There aren't any nodes below a peripheral node, so there's no 1803 * reason to descend the tree any further. 1804 */ 1805 retval = DM_RET_STOP; 1806 1807 for (i = 0; i < num_patterns; i++) { 1808 struct periph_match_pattern *cur_pattern; 1809 1810 /* 1811 * If the pattern in question isn't for a peripheral, we 1812 * aren't interested. 1813 */ 1814 if (patterns[i].type != DEV_MATCH_PERIPH) 1815 continue; 1816 1817 cur_pattern = &patterns[i].pattern.periph_pattern; 1818 1819 /* 1820 * If they want to match on anything, then we will do so. 1821 */ 1822 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1823 /* set the copy flag */ 1824 retval |= DM_RET_COPY; 1825 1826 /* 1827 * We've already set the return action to stop, 1828 * since there are no nodes below peripherals in 1829 * the tree. 1830 */ 1831 return(retval); 1832 } 1833 1834 /* 1835 * Not sure why someone would do this... 1836 */ 1837 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1838 continue; 1839 1840 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1841 && (cur_pattern->path_id != periph->path->bus->path_id)) 1842 continue; 1843 1844 /* 1845 * For the target and lun id's, we have to make sure the 1846 * target and lun pointers aren't NULL. The xpt peripheral 1847 * has a wildcard target and device. 1848 */ 1849 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1850 && ((periph->path->target == NULL) 1851 ||(cur_pattern->target_id != periph->path->target->target_id))) 1852 continue; 1853 1854 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1855 && ((periph->path->device == NULL) 1856 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1857 continue; 1858 1859 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1860 && (cur_pattern->unit_number != periph->unit_number)) 1861 continue; 1862 1863 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1864 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1865 DEV_IDLEN) != 0)) 1866 continue; 1867 1868 /* 1869 * If we get to this point, the user definitely wants 1870 * information on this peripheral. So tell the caller to 1871 * copy the data out. 1872 */ 1873 retval |= DM_RET_COPY; 1874 1875 /* 1876 * The return action has already been set to stop, since 1877 * peripherals don't have any nodes below them in the EDT. 1878 */ 1879 return(retval); 1880 } 1881 1882 /* 1883 * If we get to this point, the peripheral that was passed in 1884 * doesn't match any of the patterns. 1885 */ 1886 return(retval); 1887 } 1888 1889 static int 1890 xptedtbusfunc(struct cam_eb *bus, void *arg) 1891 { 1892 struct ccb_dev_match *cdm; 1893 dev_match_ret retval; 1894 1895 cdm = (struct ccb_dev_match *)arg; 1896 1897 /* 1898 * If our position is for something deeper in the tree, that means 1899 * that we've already seen this node. So, we keep going down. 1900 */ 1901 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1902 && (cdm->pos.cookie.bus == bus) 1903 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1904 && (cdm->pos.cookie.target != NULL)) 1905 retval = DM_RET_DESCEND; 1906 else 1907 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1908 1909 /* 1910 * If we got an error, bail out of the search. 1911 */ 1912 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1913 cdm->status = CAM_DEV_MATCH_ERROR; 1914 return(0); 1915 } 1916 1917 /* 1918 * If the copy flag is set, copy this bus out. 1919 */ 1920 if (retval & DM_RET_COPY) { 1921 int spaceleft, j; 1922 1923 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1924 sizeof(struct dev_match_result)); 1925 1926 /* 1927 * If we don't have enough space to put in another 1928 * match result, save our position and tell the 1929 * user there are more devices to check. 1930 */ 1931 if (spaceleft < sizeof(struct dev_match_result)) { 1932 bzero(&cdm->pos, sizeof(cdm->pos)); 1933 cdm->pos.position_type = 1934 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1935 1936 cdm->pos.cookie.bus = bus; 1937 cdm->pos.generations[CAM_BUS_GENERATION]= 1938 bus_generation; 1939 cdm->status = CAM_DEV_MATCH_MORE; 1940 return(0); 1941 } 1942 j = cdm->num_matches; 1943 cdm->num_matches++; 1944 cdm->matches[j].type = DEV_MATCH_BUS; 1945 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1946 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1947 cdm->matches[j].result.bus_result.unit_number = 1948 bus->sim->unit_number; 1949 strncpy(cdm->matches[j].result.bus_result.dev_name, 1950 bus->sim->sim_name, DEV_IDLEN); 1951 } 1952 1953 /* 1954 * If the user is only interested in busses, there's no 1955 * reason to descend to the next level in the tree. 1956 */ 1957 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1958 return(1); 1959 1960 /* 1961 * If there is a target generation recorded, check it to 1962 * make sure the target list hasn't changed. 1963 */ 1964 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1965 && (bus == cdm->pos.cookie.bus) 1966 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1967 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1968 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1969 bus->generation)) { 1970 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1971 return(0); 1972 } 1973 1974 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1975 && (cdm->pos.cookie.bus == bus) 1976 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1977 && (cdm->pos.cookie.target != NULL)) 1978 return(xpttargettraverse(bus, 1979 (struct cam_et *)cdm->pos.cookie.target, 1980 xptedttargetfunc, arg)); 1981 else 1982 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1983 } 1984 1985 static int 1986 xptedttargetfunc(struct cam_et *target, void *arg) 1987 { 1988 struct ccb_dev_match *cdm; 1989 1990 cdm = (struct ccb_dev_match *)arg; 1991 1992 /* 1993 * If there is a device list generation recorded, check it to 1994 * make sure the device list hasn't changed. 1995 */ 1996 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1997 && (cdm->pos.cookie.bus == target->bus) 1998 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1999 && (cdm->pos.cookie.target == target) 2000 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2001 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2002 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2003 target->generation)) { 2004 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2005 return(0); 2006 } 2007 2008 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2009 && (cdm->pos.cookie.bus == target->bus) 2010 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2011 && (cdm->pos.cookie.target == target) 2012 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2013 && (cdm->pos.cookie.device != NULL)) 2014 return(xptdevicetraverse(target, 2015 (struct cam_ed *)cdm->pos.cookie.device, 2016 xptedtdevicefunc, arg)); 2017 else 2018 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2019 } 2020 2021 static int 2022 xptedtdevicefunc(struct cam_ed *device, void *arg) 2023 { 2024 2025 struct ccb_dev_match *cdm; 2026 dev_match_ret retval; 2027 2028 cdm = (struct ccb_dev_match *)arg; 2029 2030 /* 2031 * If our position is for something deeper in the tree, that means 2032 * that we've already seen this node. So, we keep going down. 2033 */ 2034 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2035 && (cdm->pos.cookie.device == device) 2036 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2037 && (cdm->pos.cookie.periph != NULL)) 2038 retval = DM_RET_DESCEND; 2039 else 2040 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2041 device); 2042 2043 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2044 cdm->status = CAM_DEV_MATCH_ERROR; 2045 return(0); 2046 } 2047 2048 /* 2049 * If the copy flag is set, copy this device out. 2050 */ 2051 if (retval & DM_RET_COPY) { 2052 int spaceleft, j; 2053 2054 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2055 sizeof(struct dev_match_result)); 2056 2057 /* 2058 * If we don't have enough space to put in another 2059 * match result, save our position and tell the 2060 * user there are more devices to check. 2061 */ 2062 if (spaceleft < sizeof(struct dev_match_result)) { 2063 bzero(&cdm->pos, sizeof(cdm->pos)); 2064 cdm->pos.position_type = 2065 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2066 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2067 2068 cdm->pos.cookie.bus = device->target->bus; 2069 cdm->pos.generations[CAM_BUS_GENERATION]= 2070 bus_generation; 2071 cdm->pos.cookie.target = device->target; 2072 cdm->pos.generations[CAM_TARGET_GENERATION] = 2073 device->target->bus->generation; 2074 cdm->pos.cookie.device = device; 2075 cdm->pos.generations[CAM_DEV_GENERATION] = 2076 device->target->generation; 2077 cdm->status = CAM_DEV_MATCH_MORE; 2078 return(0); 2079 } 2080 j = cdm->num_matches; 2081 cdm->num_matches++; 2082 cdm->matches[j].type = DEV_MATCH_DEVICE; 2083 cdm->matches[j].result.device_result.path_id = 2084 device->target->bus->path_id; 2085 cdm->matches[j].result.device_result.target_id = 2086 device->target->target_id; 2087 cdm->matches[j].result.device_result.target_lun = 2088 device->lun_id; 2089 bcopy(&device->inq_data, 2090 &cdm->matches[j].result.device_result.inq_data, 2091 sizeof(struct scsi_inquiry_data)); 2092 2093 /* Let the user know whether this device is unconfigured */ 2094 if (device->flags & CAM_DEV_UNCONFIGURED) 2095 cdm->matches[j].result.device_result.flags = 2096 DEV_RESULT_UNCONFIGURED; 2097 else 2098 cdm->matches[j].result.device_result.flags = 2099 DEV_RESULT_NOFLAG; 2100 } 2101 2102 /* 2103 * If the user isn't interested in peripherals, don't descend 2104 * the tree any further. 2105 */ 2106 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2107 return(1); 2108 2109 /* 2110 * If there is a peripheral list generation recorded, make sure 2111 * it hasn't changed. 2112 */ 2113 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2114 && (device->target->bus == cdm->pos.cookie.bus) 2115 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2116 && (device->target == cdm->pos.cookie.target) 2117 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2118 && (device == cdm->pos.cookie.device) 2119 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2120 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2121 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2122 device->generation)){ 2123 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2124 return(0); 2125 } 2126 2127 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2128 && (cdm->pos.cookie.bus == device->target->bus) 2129 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2130 && (cdm->pos.cookie.target == device->target) 2131 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2132 && (cdm->pos.cookie.device == device) 2133 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2134 && (cdm->pos.cookie.periph != NULL)) 2135 return(xptperiphtraverse(device, 2136 (struct cam_periph *)cdm->pos.cookie.periph, 2137 xptedtperiphfunc, arg)); 2138 else 2139 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2140 } 2141 2142 static int 2143 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2144 { 2145 struct ccb_dev_match *cdm; 2146 dev_match_ret retval; 2147 2148 cdm = (struct ccb_dev_match *)arg; 2149 2150 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2151 2152 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2153 cdm->status = CAM_DEV_MATCH_ERROR; 2154 return(0); 2155 } 2156 2157 /* 2158 * If the copy flag is set, copy this peripheral out. 2159 */ 2160 if (retval & DM_RET_COPY) { 2161 int spaceleft, j; 2162 2163 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2164 sizeof(struct dev_match_result)); 2165 2166 /* 2167 * If we don't have enough space to put in another 2168 * match result, save our position and tell the 2169 * user there are more devices to check. 2170 */ 2171 if (spaceleft < sizeof(struct dev_match_result)) { 2172 bzero(&cdm->pos, sizeof(cdm->pos)); 2173 cdm->pos.position_type = 2174 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2175 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2176 CAM_DEV_POS_PERIPH; 2177 2178 cdm->pos.cookie.bus = periph->path->bus; 2179 cdm->pos.generations[CAM_BUS_GENERATION]= 2180 bus_generation; 2181 cdm->pos.cookie.target = periph->path->target; 2182 cdm->pos.generations[CAM_TARGET_GENERATION] = 2183 periph->path->bus->generation; 2184 cdm->pos.cookie.device = periph->path->device; 2185 cdm->pos.generations[CAM_DEV_GENERATION] = 2186 periph->path->target->generation; 2187 cdm->pos.cookie.periph = periph; 2188 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2189 periph->path->device->generation; 2190 cdm->status = CAM_DEV_MATCH_MORE; 2191 return(0); 2192 } 2193 2194 j = cdm->num_matches; 2195 cdm->num_matches++; 2196 cdm->matches[j].type = DEV_MATCH_PERIPH; 2197 cdm->matches[j].result.periph_result.path_id = 2198 periph->path->bus->path_id; 2199 cdm->matches[j].result.periph_result.target_id = 2200 periph->path->target->target_id; 2201 cdm->matches[j].result.periph_result.target_lun = 2202 periph->path->device->lun_id; 2203 cdm->matches[j].result.periph_result.unit_number = 2204 periph->unit_number; 2205 strncpy(cdm->matches[j].result.periph_result.periph_name, 2206 periph->periph_name, DEV_IDLEN); 2207 } 2208 2209 return(1); 2210 } 2211 2212 static int 2213 xptedtmatch(struct ccb_dev_match *cdm) 2214 { 2215 int ret; 2216 2217 cdm->num_matches = 0; 2218 2219 /* 2220 * Check the bus list generation. If it has changed, the user 2221 * needs to reset everything and start over. 2222 */ 2223 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2224 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2225 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2226 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2227 return(0); 2228 } 2229 2230 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2231 && (cdm->pos.cookie.bus != NULL)) 2232 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2233 xptedtbusfunc, cdm); 2234 else 2235 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2236 2237 /* 2238 * If we get back 0, that means that we had to stop before fully 2239 * traversing the EDT. It also means that one of the subroutines 2240 * has set the status field to the proper value. If we get back 1, 2241 * we've fully traversed the EDT and copied out any matching entries. 2242 */ 2243 if (ret == 1) 2244 cdm->status = CAM_DEV_MATCH_LAST; 2245 2246 return(ret); 2247 } 2248 2249 static int 2250 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2251 { 2252 struct ccb_dev_match *cdm; 2253 2254 cdm = (struct ccb_dev_match *)arg; 2255 2256 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2257 && (cdm->pos.cookie.pdrv == pdrv) 2258 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2259 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2260 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2261 (*pdrv)->generation)) { 2262 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2263 return(0); 2264 } 2265 2266 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2267 && (cdm->pos.cookie.pdrv == pdrv) 2268 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2269 && (cdm->pos.cookie.periph != NULL)) 2270 return(xptpdperiphtraverse(pdrv, 2271 (struct cam_periph *)cdm->pos.cookie.periph, 2272 xptplistperiphfunc, arg)); 2273 else 2274 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2275 } 2276 2277 static int 2278 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2279 { 2280 struct ccb_dev_match *cdm; 2281 dev_match_ret retval; 2282 2283 cdm = (struct ccb_dev_match *)arg; 2284 2285 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2286 2287 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2288 cdm->status = CAM_DEV_MATCH_ERROR; 2289 return(0); 2290 } 2291 2292 /* 2293 * If the copy flag is set, copy this peripheral out. 2294 */ 2295 if (retval & DM_RET_COPY) { 2296 int spaceleft, j; 2297 2298 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2299 sizeof(struct dev_match_result)); 2300 2301 /* 2302 * If we don't have enough space to put in another 2303 * match result, save our position and tell the 2304 * user there are more devices to check. 2305 */ 2306 if (spaceleft < sizeof(struct dev_match_result)) { 2307 struct periph_driver **pdrv; 2308 2309 pdrv = NULL; 2310 bzero(&cdm->pos, sizeof(cdm->pos)); 2311 cdm->pos.position_type = 2312 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2313 CAM_DEV_POS_PERIPH; 2314 2315 /* 2316 * This may look a bit non-sensical, but it is 2317 * actually quite logical. There are very few 2318 * peripheral drivers, and bloating every peripheral 2319 * structure with a pointer back to its parent 2320 * peripheral driver linker set entry would cost 2321 * more in the long run than doing this quick lookup. 2322 */ 2323 SET_FOREACH(pdrv, periphdriver_set) { 2324 if (strcmp((*pdrv)->driver_name, 2325 periph->periph_name) == 0) 2326 break; 2327 } 2328 2329 if (*pdrv == NULL) { 2330 cdm->status = CAM_DEV_MATCH_ERROR; 2331 return(0); 2332 } 2333 2334 cdm->pos.cookie.pdrv = pdrv; 2335 /* 2336 * The periph generation slot does double duty, as 2337 * does the periph pointer slot. They are used for 2338 * both edt and pdrv lookups and positioning. 2339 */ 2340 cdm->pos.cookie.periph = periph; 2341 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2342 (*pdrv)->generation; 2343 cdm->status = CAM_DEV_MATCH_MORE; 2344 return(0); 2345 } 2346 2347 j = cdm->num_matches; 2348 cdm->num_matches++; 2349 cdm->matches[j].type = DEV_MATCH_PERIPH; 2350 cdm->matches[j].result.periph_result.path_id = 2351 periph->path->bus->path_id; 2352 2353 /* 2354 * The transport layer peripheral doesn't have a target or 2355 * lun. 2356 */ 2357 if (periph->path->target) 2358 cdm->matches[j].result.periph_result.target_id = 2359 periph->path->target->target_id; 2360 else 2361 cdm->matches[j].result.periph_result.target_id = -1; 2362 2363 if (periph->path->device) 2364 cdm->matches[j].result.periph_result.target_lun = 2365 periph->path->device->lun_id; 2366 else 2367 cdm->matches[j].result.periph_result.target_lun = -1; 2368 2369 cdm->matches[j].result.periph_result.unit_number = 2370 periph->unit_number; 2371 strncpy(cdm->matches[j].result.periph_result.periph_name, 2372 periph->periph_name, DEV_IDLEN); 2373 } 2374 2375 return(1); 2376 } 2377 2378 static int 2379 xptperiphlistmatch(struct ccb_dev_match *cdm) 2380 { 2381 int ret; 2382 2383 cdm->num_matches = 0; 2384 2385 /* 2386 * At this point in the edt traversal function, we check the bus 2387 * list generation to make sure that no busses have been added or 2388 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2389 * For the peripheral driver list traversal function, however, we 2390 * don't have to worry about new peripheral driver types coming or 2391 * going; they're in a linker set, and therefore can't change 2392 * without a recompile. 2393 */ 2394 2395 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2396 && (cdm->pos.cookie.pdrv != NULL)) 2397 ret = xptpdrvtraverse( 2398 (struct periph_driver **)cdm->pos.cookie.pdrv, 2399 xptplistpdrvfunc, cdm); 2400 else 2401 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2402 2403 /* 2404 * If we get back 0, that means that we had to stop before fully 2405 * traversing the peripheral driver tree. It also means that one of 2406 * the subroutines has set the status field to the proper value. If 2407 * we get back 1, we've fully traversed the EDT and copied out any 2408 * matching entries. 2409 */ 2410 if (ret == 1) 2411 cdm->status = CAM_DEV_MATCH_LAST; 2412 2413 return(ret); 2414 } 2415 2416 static int 2417 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2418 { 2419 struct cam_eb *bus, *next_bus; 2420 int retval; 2421 2422 retval = 1; 2423 2424 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2425 bus != NULL; 2426 bus = next_bus) { 2427 next_bus = TAILQ_NEXT(bus, links); 2428 2429 retval = tr_func(bus, arg); 2430 if (retval == 0) 2431 return(retval); 2432 } 2433 2434 return(retval); 2435 } 2436 2437 static int 2438 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2439 xpt_targetfunc_t *tr_func, void *arg) 2440 { 2441 struct cam_et *target, *next_target; 2442 int retval; 2443 2444 retval = 1; 2445 for (target = (start_target ? start_target : 2446 TAILQ_FIRST(&bus->et_entries)); 2447 target != NULL; target = next_target) { 2448 2449 next_target = TAILQ_NEXT(target, links); 2450 2451 retval = tr_func(target, arg); 2452 2453 if (retval == 0) 2454 return(retval); 2455 } 2456 2457 return(retval); 2458 } 2459 2460 static int 2461 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2462 xpt_devicefunc_t *tr_func, void *arg) 2463 { 2464 struct cam_ed *device, *next_device; 2465 int retval; 2466 2467 retval = 1; 2468 for (device = (start_device ? start_device : 2469 TAILQ_FIRST(&target->ed_entries)); 2470 device != NULL; 2471 device = next_device) { 2472 2473 next_device = TAILQ_NEXT(device, links); 2474 2475 retval = tr_func(device, arg); 2476 2477 if (retval == 0) 2478 return(retval); 2479 } 2480 2481 return(retval); 2482 } 2483 2484 static int 2485 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2486 xpt_periphfunc_t *tr_func, void *arg) 2487 { 2488 struct cam_periph *periph, *next_periph; 2489 int retval; 2490 2491 retval = 1; 2492 2493 for (periph = (start_periph ? start_periph : 2494 SLIST_FIRST(&device->periphs)); 2495 periph != NULL; 2496 periph = next_periph) { 2497 2498 next_periph = SLIST_NEXT(periph, periph_links); 2499 2500 retval = tr_func(periph, arg); 2501 if (retval == 0) 2502 return(retval); 2503 } 2504 2505 return(retval); 2506 } 2507 2508 static int 2509 xptpdrvtraverse(struct periph_driver **start_pdrv, 2510 xpt_pdrvfunc_t *tr_func, void *arg) 2511 { 2512 struct periph_driver **pdrv; 2513 int retval; 2514 2515 retval = 1; 2516 2517 /* 2518 * We don't traverse the peripheral driver list like we do the 2519 * other lists, because it is a linker set, and therefore cannot be 2520 * changed during runtime. If the peripheral driver list is ever 2521 * re-done to be something other than a linker set (i.e. it can 2522 * change while the system is running), the list traversal should 2523 * be modified to work like the other traversal functions. 2524 */ 2525 SET_FOREACH(pdrv, periphdriver_set) { 2526 if (start_pdrv == NULL || start_pdrv == pdrv) { 2527 retval = tr_func(pdrv, arg); 2528 if (retval == 0) 2529 return(retval); 2530 start_pdrv = NULL; /* traverse remainder */ 2531 } 2532 } 2533 return(retval); 2534 } 2535 2536 static int 2537 xptpdperiphtraverse(struct periph_driver **pdrv, 2538 struct cam_periph *start_periph, 2539 xpt_periphfunc_t *tr_func, void *arg) 2540 { 2541 struct cam_periph *periph, *next_periph; 2542 int retval; 2543 2544 retval = 1; 2545 2546 for (periph = (start_periph ? start_periph : 2547 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2548 periph = next_periph) { 2549 2550 next_periph = TAILQ_NEXT(periph, unit_links); 2551 2552 retval = tr_func(periph, arg); 2553 if (retval == 0) 2554 return(retval); 2555 } 2556 return(retval); 2557 } 2558 2559 static int 2560 xptdefbusfunc(struct cam_eb *bus, void *arg) 2561 { 2562 struct xpt_traverse_config *tr_config; 2563 2564 tr_config = (struct xpt_traverse_config *)arg; 2565 2566 if (tr_config->depth == XPT_DEPTH_BUS) { 2567 xpt_busfunc_t *tr_func; 2568 2569 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2570 2571 return(tr_func(bus, tr_config->tr_arg)); 2572 } else 2573 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2574 } 2575 2576 static int 2577 xptdeftargetfunc(struct cam_et *target, void *arg) 2578 { 2579 struct xpt_traverse_config *tr_config; 2580 2581 tr_config = (struct xpt_traverse_config *)arg; 2582 2583 if (tr_config->depth == XPT_DEPTH_TARGET) { 2584 xpt_targetfunc_t *tr_func; 2585 2586 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2587 2588 return(tr_func(target, tr_config->tr_arg)); 2589 } else 2590 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2591 } 2592 2593 static int 2594 xptdefdevicefunc(struct cam_ed *device, void *arg) 2595 { 2596 struct xpt_traverse_config *tr_config; 2597 2598 tr_config = (struct xpt_traverse_config *)arg; 2599 2600 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2601 xpt_devicefunc_t *tr_func; 2602 2603 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2604 2605 return(tr_func(device, tr_config->tr_arg)); 2606 } else 2607 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2608 } 2609 2610 static int 2611 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2612 { 2613 struct xpt_traverse_config *tr_config; 2614 xpt_periphfunc_t *tr_func; 2615 2616 tr_config = (struct xpt_traverse_config *)arg; 2617 2618 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2619 2620 /* 2621 * Unlike the other default functions, we don't check for depth 2622 * here. The peripheral driver level is the last level in the EDT, 2623 * so if we're here, we should execute the function in question. 2624 */ 2625 return(tr_func(periph, tr_config->tr_arg)); 2626 } 2627 2628 /* 2629 * Execute the given function for every bus in the EDT. 2630 */ 2631 static int 2632 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2633 { 2634 struct xpt_traverse_config tr_config; 2635 2636 tr_config.depth = XPT_DEPTH_BUS; 2637 tr_config.tr_func = tr_func; 2638 tr_config.tr_arg = arg; 2639 2640 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2641 } 2642 2643 #ifdef notusedyet 2644 /* 2645 * Execute the given function for every target in the EDT. 2646 */ 2647 static int 2648 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2649 { 2650 struct xpt_traverse_config tr_config; 2651 2652 tr_config.depth = XPT_DEPTH_TARGET; 2653 tr_config.tr_func = tr_func; 2654 tr_config.tr_arg = arg; 2655 2656 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2657 } 2658 #endif /* notusedyet */ 2659 2660 /* 2661 * Execute the given function for every device in the EDT. 2662 */ 2663 static int 2664 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2665 { 2666 struct xpt_traverse_config tr_config; 2667 2668 tr_config.depth = XPT_DEPTH_DEVICE; 2669 tr_config.tr_func = tr_func; 2670 tr_config.tr_arg = arg; 2671 2672 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2673 } 2674 2675 #ifdef notusedyet 2676 /* 2677 * Execute the given function for every peripheral in the EDT. 2678 */ 2679 static int 2680 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2681 { 2682 struct xpt_traverse_config tr_config; 2683 2684 tr_config.depth = XPT_DEPTH_PERIPH; 2685 tr_config.tr_func = tr_func; 2686 tr_config.tr_arg = arg; 2687 2688 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2689 } 2690 #endif /* notusedyet */ 2691 2692 static int 2693 xptsetasyncfunc(struct cam_ed *device, void *arg) 2694 { 2695 struct cam_path path; 2696 struct ccb_getdev cgd; 2697 struct async_node *cur_entry; 2698 2699 cur_entry = (struct async_node *)arg; 2700 2701 /* 2702 * Don't report unconfigured devices (Wildcard devs, 2703 * devices only for target mode, device instances 2704 * that have been invalidated but are waiting for 2705 * their last reference count to be released). 2706 */ 2707 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2708 return (1); 2709 2710 xpt_compile_path(&path, 2711 NULL, 2712 device->target->bus->path_id, 2713 device->target->target_id, 2714 device->lun_id); 2715 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2716 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2717 xpt_action((union ccb *)&cgd); 2718 cur_entry->callback(cur_entry->callback_arg, 2719 AC_FOUND_DEVICE, 2720 &path, &cgd); 2721 xpt_release_path(&path); 2722 2723 return(1); 2724 } 2725 2726 static int 2727 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2728 { 2729 struct cam_path path; 2730 struct ccb_pathinq cpi; 2731 struct async_node *cur_entry; 2732 2733 cur_entry = (struct async_node *)arg; 2734 2735 xpt_compile_path(&path, /*periph*/NULL, 2736 bus->sim->path_id, 2737 CAM_TARGET_WILDCARD, 2738 CAM_LUN_WILDCARD); 2739 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2740 cpi.ccb_h.func_code = XPT_PATH_INQ; 2741 xpt_action((union ccb *)&cpi); 2742 cur_entry->callback(cur_entry->callback_arg, 2743 AC_PATH_REGISTERED, 2744 &path, &cpi); 2745 xpt_release_path(&path); 2746 2747 return(1); 2748 } 2749 2750 void 2751 xpt_action(union ccb *start_ccb) 2752 { 2753 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2754 2755 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2756 2757 crit_enter(); 2758 2759 switch (start_ccb->ccb_h.func_code) { 2760 case XPT_SCSI_IO: 2761 { 2762 #ifdef CAMDEBUG 2763 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2764 struct cam_path *path; 2765 2766 path = start_ccb->ccb_h.path; 2767 #endif 2768 2769 /* 2770 * For the sake of compatibility with SCSI-1 2771 * devices that may not understand the identify 2772 * message, we include lun information in the 2773 * second byte of all commands. SCSI-1 specifies 2774 * that luns are a 3 bit value and reserves only 3 2775 * bits for lun information in the CDB. Later 2776 * revisions of the SCSI spec allow for more than 8 2777 * luns, but have deprecated lun information in the 2778 * CDB. So, if the lun won't fit, we must omit. 2779 * 2780 * Also be aware that during initial probing for devices, 2781 * the inquiry information is unknown but initialized to 0. 2782 * This means that this code will be exercised while probing 2783 * devices with an ANSI revision greater than 2. 2784 */ 2785 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2786 && start_ccb->ccb_h.target_lun < 8 2787 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2788 2789 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2790 start_ccb->ccb_h.target_lun << 5; 2791 } 2792 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2793 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2794 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2795 &path->device->inq_data), 2796 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2797 cdb_str, sizeof(cdb_str)))); 2798 /* FALLTHROUGH */ 2799 } 2800 case XPT_TARGET_IO: 2801 case XPT_CONT_TARGET_IO: 2802 start_ccb->csio.sense_resid = 0; 2803 start_ccb->csio.resid = 0; 2804 /* FALLTHROUGH */ 2805 case XPT_RESET_DEV: 2806 case XPT_ENG_EXEC: 2807 { 2808 struct cam_path *path; 2809 int runq; 2810 2811 path = start_ccb->ccb_h.path; 2812 2813 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2814 if (path->device->qfrozen_cnt == 0) 2815 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2816 else 2817 runq = 0; 2818 if (runq != 0) 2819 xpt_run_dev_sendq(path->bus); 2820 break; 2821 } 2822 case XPT_SET_TRAN_SETTINGS: 2823 { 2824 xpt_set_transfer_settings(&start_ccb->cts, 2825 start_ccb->ccb_h.path->device, 2826 /*async_update*/FALSE); 2827 break; 2828 } 2829 case XPT_CALC_GEOMETRY: 2830 { 2831 struct cam_sim *sim; 2832 2833 /* Filter out garbage */ 2834 if (start_ccb->ccg.block_size == 0 2835 || start_ccb->ccg.volume_size == 0) { 2836 start_ccb->ccg.cylinders = 0; 2837 start_ccb->ccg.heads = 0; 2838 start_ccb->ccg.secs_per_track = 0; 2839 start_ccb->ccb_h.status = CAM_REQ_CMP; 2840 break; 2841 } 2842 sim = start_ccb->ccb_h.path->bus->sim; 2843 (*(sim->sim_action))(sim, start_ccb); 2844 break; 2845 } 2846 case XPT_ABORT: 2847 { 2848 union ccb* abort_ccb; 2849 2850 abort_ccb = start_ccb->cab.abort_ccb; 2851 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2852 2853 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2854 struct cam_ccbq *ccbq; 2855 2856 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 2857 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2858 abort_ccb->ccb_h.status = 2859 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2860 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2861 xpt_done(abort_ccb); 2862 start_ccb->ccb_h.status = CAM_REQ_CMP; 2863 break; 2864 } 2865 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2866 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2867 /* 2868 * We've caught this ccb en route to 2869 * the SIM. Flag it for abort and the 2870 * SIM will do so just before starting 2871 * real work on the CCB. 2872 */ 2873 abort_ccb->ccb_h.status = 2874 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2875 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2876 start_ccb->ccb_h.status = CAM_REQ_CMP; 2877 break; 2878 } 2879 } 2880 if (XPT_FC_IS_QUEUED(abort_ccb) 2881 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2882 /* 2883 * It's already completed but waiting 2884 * for our SWI to get to it. 2885 */ 2886 start_ccb->ccb_h.status = CAM_UA_ABORT; 2887 break; 2888 } 2889 /* 2890 * If we weren't able to take care of the abort request 2891 * in the XPT, pass the request down to the SIM for processing. 2892 */ 2893 /* FALLTHROUGH */ 2894 } 2895 case XPT_ACCEPT_TARGET_IO: 2896 case XPT_EN_LUN: 2897 case XPT_IMMED_NOTIFY: 2898 case XPT_NOTIFY_ACK: 2899 case XPT_GET_TRAN_SETTINGS: 2900 case XPT_RESET_BUS: 2901 { 2902 struct cam_sim *sim; 2903 2904 sim = start_ccb->ccb_h.path->bus->sim; 2905 (*(sim->sim_action))(sim, start_ccb); 2906 break; 2907 } 2908 case XPT_PATH_INQ: 2909 { 2910 struct cam_sim *sim; 2911 2912 sim = start_ccb->ccb_h.path->bus->sim; 2913 (*(sim->sim_action))(sim, start_ccb); 2914 break; 2915 } 2916 case XPT_PATH_STATS: 2917 start_ccb->cpis.last_reset = 2918 start_ccb->ccb_h.path->bus->last_reset; 2919 start_ccb->ccb_h.status = CAM_REQ_CMP; 2920 break; 2921 case XPT_GDEV_TYPE: 2922 { 2923 struct cam_ed *dev; 2924 2925 dev = start_ccb->ccb_h.path->device; 2926 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2927 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2928 } else { 2929 struct ccb_getdev *cgd; 2930 struct cam_eb *bus; 2931 struct cam_et *tar; 2932 2933 cgd = &start_ccb->cgd; 2934 bus = cgd->ccb_h.path->bus; 2935 tar = cgd->ccb_h.path->target; 2936 cgd->inq_data = dev->inq_data; 2937 cgd->ccb_h.status = CAM_REQ_CMP; 2938 cgd->serial_num_len = dev->serial_num_len; 2939 if ((dev->serial_num_len > 0) 2940 && (dev->serial_num != NULL)) 2941 bcopy(dev->serial_num, cgd->serial_num, 2942 dev->serial_num_len); 2943 } 2944 break; 2945 } 2946 case XPT_GDEV_STATS: 2947 { 2948 struct cam_ed *dev; 2949 2950 dev = start_ccb->ccb_h.path->device; 2951 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2952 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2953 } else { 2954 struct ccb_getdevstats *cgds; 2955 struct cam_eb *bus; 2956 struct cam_et *tar; 2957 2958 cgds = &start_ccb->cgds; 2959 bus = cgds->ccb_h.path->bus; 2960 tar = cgds->ccb_h.path->target; 2961 cgds->dev_openings = dev->ccbq.dev_openings; 2962 cgds->dev_active = dev->ccbq.dev_active; 2963 cgds->devq_openings = dev->ccbq.devq_openings; 2964 cgds->devq_queued = dev->ccbq.queue.entries; 2965 cgds->held = dev->ccbq.held; 2966 cgds->last_reset = tar->last_reset; 2967 cgds->maxtags = dev->quirk->maxtags; 2968 cgds->mintags = dev->quirk->mintags; 2969 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2970 cgds->last_reset = bus->last_reset; 2971 cgds->ccb_h.status = CAM_REQ_CMP; 2972 } 2973 break; 2974 } 2975 case XPT_GDEVLIST: 2976 { 2977 struct cam_periph *nperiph; 2978 struct periph_list *periph_head; 2979 struct ccb_getdevlist *cgdl; 2980 int i; 2981 struct cam_ed *device; 2982 int found; 2983 2984 2985 found = 0; 2986 2987 /* 2988 * Don't want anyone mucking with our data. 2989 */ 2990 device = start_ccb->ccb_h.path->device; 2991 periph_head = &device->periphs; 2992 cgdl = &start_ccb->cgdl; 2993 2994 /* 2995 * Check and see if the list has changed since the user 2996 * last requested a list member. If so, tell them that the 2997 * list has changed, and therefore they need to start over 2998 * from the beginning. 2999 */ 3000 if ((cgdl->index != 0) && 3001 (cgdl->generation != device->generation)) { 3002 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3003 break; 3004 } 3005 3006 /* 3007 * Traverse the list of peripherals and attempt to find 3008 * the requested peripheral. 3009 */ 3010 for (nperiph = periph_head->slh_first, i = 0; 3011 (nperiph != NULL) && (i <= cgdl->index); 3012 nperiph = nperiph->periph_links.sle_next, i++) { 3013 if (i == cgdl->index) { 3014 strncpy(cgdl->periph_name, 3015 nperiph->periph_name, 3016 DEV_IDLEN); 3017 cgdl->unit_number = nperiph->unit_number; 3018 found = 1; 3019 } 3020 } 3021 if (found == 0) { 3022 cgdl->status = CAM_GDEVLIST_ERROR; 3023 break; 3024 } 3025 3026 if (nperiph == NULL) 3027 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3028 else 3029 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3030 3031 cgdl->index++; 3032 cgdl->generation = device->generation; 3033 3034 cgdl->ccb_h.status = CAM_REQ_CMP; 3035 break; 3036 } 3037 case XPT_DEV_MATCH: 3038 { 3039 dev_pos_type position_type; 3040 struct ccb_dev_match *cdm; 3041 int ret; 3042 3043 cdm = &start_ccb->cdm; 3044 3045 /* 3046 * Prevent EDT changes while we traverse it. 3047 */ 3048 /* 3049 * There are two ways of getting at information in the EDT. 3050 * The first way is via the primary EDT tree. It starts 3051 * with a list of busses, then a list of targets on a bus, 3052 * then devices/luns on a target, and then peripherals on a 3053 * device/lun. The "other" way is by the peripheral driver 3054 * lists. The peripheral driver lists are organized by 3055 * peripheral driver. (obviously) So it makes sense to 3056 * use the peripheral driver list if the user is looking 3057 * for something like "da1", or all "da" devices. If the 3058 * user is looking for something on a particular bus/target 3059 * or lun, it's generally better to go through the EDT tree. 3060 */ 3061 3062 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3063 position_type = cdm->pos.position_type; 3064 else { 3065 int i; 3066 3067 position_type = CAM_DEV_POS_NONE; 3068 3069 for (i = 0; i < cdm->num_patterns; i++) { 3070 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3071 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3072 position_type = CAM_DEV_POS_EDT; 3073 break; 3074 } 3075 } 3076 3077 if (cdm->num_patterns == 0) 3078 position_type = CAM_DEV_POS_EDT; 3079 else if (position_type == CAM_DEV_POS_NONE) 3080 position_type = CAM_DEV_POS_PDRV; 3081 } 3082 3083 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3084 case CAM_DEV_POS_EDT: 3085 ret = xptedtmatch(cdm); 3086 break; 3087 case CAM_DEV_POS_PDRV: 3088 ret = xptperiphlistmatch(cdm); 3089 break; 3090 default: 3091 cdm->status = CAM_DEV_MATCH_ERROR; 3092 break; 3093 } 3094 3095 if (cdm->status == CAM_DEV_MATCH_ERROR) 3096 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3097 else 3098 start_ccb->ccb_h.status = CAM_REQ_CMP; 3099 3100 break; 3101 } 3102 case XPT_SASYNC_CB: 3103 { 3104 struct ccb_setasync *csa; 3105 struct async_node *cur_entry; 3106 struct async_list *async_head; 3107 u_int32_t added; 3108 3109 csa = &start_ccb->csa; 3110 added = csa->event_enable; 3111 async_head = &csa->ccb_h.path->device->asyncs; 3112 3113 /* 3114 * If there is already an entry for us, simply 3115 * update it. 3116 */ 3117 cur_entry = SLIST_FIRST(async_head); 3118 while (cur_entry != NULL) { 3119 if ((cur_entry->callback_arg == csa->callback_arg) 3120 && (cur_entry->callback == csa->callback)) 3121 break; 3122 cur_entry = SLIST_NEXT(cur_entry, links); 3123 } 3124 3125 if (cur_entry != NULL) { 3126 /* 3127 * If the request has no flags set, 3128 * remove the entry. 3129 */ 3130 added &= ~cur_entry->event_enable; 3131 if (csa->event_enable == 0) { 3132 SLIST_REMOVE(async_head, cur_entry, 3133 async_node, links); 3134 csa->ccb_h.path->device->refcount--; 3135 free(cur_entry, M_DEVBUF); 3136 } else { 3137 cur_entry->event_enable = csa->event_enable; 3138 } 3139 } else { 3140 cur_entry = malloc(sizeof(*cur_entry), 3141 M_DEVBUF, M_INTWAIT); 3142 cur_entry->event_enable = csa->event_enable; 3143 cur_entry->callback_arg = csa->callback_arg; 3144 cur_entry->callback = csa->callback; 3145 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3146 csa->ccb_h.path->device->refcount++; 3147 } 3148 3149 if ((added & AC_FOUND_DEVICE) != 0) { 3150 /* 3151 * Get this peripheral up to date with all 3152 * the currently existing devices. 3153 */ 3154 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3155 } 3156 if ((added & AC_PATH_REGISTERED) != 0) { 3157 /* 3158 * Get this peripheral up to date with all 3159 * the currently existing busses. 3160 */ 3161 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3162 } 3163 start_ccb->ccb_h.status = CAM_REQ_CMP; 3164 break; 3165 } 3166 case XPT_REL_SIMQ: 3167 { 3168 struct ccb_relsim *crs; 3169 struct cam_ed *dev; 3170 3171 crs = &start_ccb->crs; 3172 dev = crs->ccb_h.path->device; 3173 if (dev == NULL) { 3174 3175 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3176 break; 3177 } 3178 3179 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3180 3181 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3182 3183 /* Don't ever go below one opening */ 3184 if (crs->openings > 0) { 3185 xpt_dev_ccbq_resize(crs->ccb_h.path, 3186 crs->openings); 3187 3188 if (bootverbose) { 3189 xpt_print_path(crs->ccb_h.path); 3190 printf("tagged openings " 3191 "now %d\n", 3192 crs->openings); 3193 } 3194 } 3195 } 3196 } 3197 3198 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3199 3200 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3201 3202 /* 3203 * Just extend the old timeout and decrement 3204 * the freeze count so that a single timeout 3205 * is sufficient for releasing the queue. 3206 */ 3207 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3208 callout_stop(&dev->c_handle); 3209 } else { 3210 3211 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3212 } 3213 3214 callout_reset(&dev->c_handle, 3215 (crs->release_timeout * hz) / 1000, 3216 xpt_release_devq_timeout, dev); 3217 3218 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3219 3220 } 3221 3222 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3223 3224 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3225 /* 3226 * Decrement the freeze count so that a single 3227 * completion is still sufficient to unfreeze 3228 * the queue. 3229 */ 3230 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3231 } else { 3232 3233 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3234 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3235 } 3236 } 3237 3238 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3239 3240 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3241 || (dev->ccbq.dev_active == 0)) { 3242 3243 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3244 } else { 3245 3246 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3247 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3248 } 3249 } 3250 3251 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3252 3253 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3254 /*run_queue*/TRUE); 3255 } 3256 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3257 start_ccb->ccb_h.status = CAM_REQ_CMP; 3258 break; 3259 } 3260 case XPT_SCAN_BUS: 3261 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3262 break; 3263 case XPT_SCAN_LUN: 3264 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3265 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3266 start_ccb); 3267 break; 3268 case XPT_DEBUG: { 3269 #ifdef CAMDEBUG 3270 #ifdef CAM_DEBUG_DELAY 3271 cam_debug_delay = CAM_DEBUG_DELAY; 3272 #endif 3273 cam_dflags = start_ccb->cdbg.flags; 3274 if (cam_dpath != NULL) { 3275 xpt_free_path(cam_dpath); 3276 cam_dpath = NULL; 3277 } 3278 3279 if (cam_dflags != CAM_DEBUG_NONE) { 3280 if (xpt_create_path(&cam_dpath, xpt_periph, 3281 start_ccb->ccb_h.path_id, 3282 start_ccb->ccb_h.target_id, 3283 start_ccb->ccb_h.target_lun) != 3284 CAM_REQ_CMP) { 3285 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3286 cam_dflags = CAM_DEBUG_NONE; 3287 } else { 3288 start_ccb->ccb_h.status = CAM_REQ_CMP; 3289 xpt_print_path(cam_dpath); 3290 printf("debugging flags now %x\n", cam_dflags); 3291 } 3292 } else { 3293 cam_dpath = NULL; 3294 start_ccb->ccb_h.status = CAM_REQ_CMP; 3295 } 3296 #else /* !CAMDEBUG */ 3297 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3298 #endif /* CAMDEBUG */ 3299 break; 3300 } 3301 case XPT_NOOP: 3302 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3303 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3304 start_ccb->ccb_h.status = CAM_REQ_CMP; 3305 break; 3306 default: 3307 case XPT_SDEV_TYPE: 3308 case XPT_TERM_IO: 3309 case XPT_ENG_INQ: 3310 /* XXX Implement */ 3311 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3312 break; 3313 } 3314 crit_exit(); 3315 } 3316 3317 void 3318 xpt_polled_action(union ccb *start_ccb) 3319 { 3320 u_int32_t timeout; 3321 struct cam_sim *sim; 3322 struct cam_devq *devq; 3323 struct cam_ed *dev; 3324 3325 timeout = start_ccb->ccb_h.timeout; 3326 sim = start_ccb->ccb_h.path->bus->sim; 3327 devq = sim->devq; 3328 dev = start_ccb->ccb_h.path->device; 3329 3330 crit_enter(); 3331 3332 /* 3333 * Steal an opening so that no other queued requests 3334 * can get it before us while we simulate interrupts. 3335 */ 3336 dev->ccbq.devq_openings--; 3337 dev->ccbq.dev_openings--; 3338 3339 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3340 && (--timeout > 0)) { 3341 DELAY(1000); 3342 (*(sim->sim_poll))(sim); 3343 swi_camnet(NULL); 3344 swi_cambio(NULL); 3345 } 3346 3347 dev->ccbq.devq_openings++; 3348 dev->ccbq.dev_openings++; 3349 3350 if (timeout != 0) { 3351 xpt_action(start_ccb); 3352 while(--timeout > 0) { 3353 (*(sim->sim_poll))(sim); 3354 swi_camnet(NULL); 3355 swi_cambio(NULL); 3356 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3357 != CAM_REQ_INPROG) 3358 break; 3359 DELAY(1000); 3360 } 3361 if (timeout == 0) { 3362 /* 3363 * XXX Is it worth adding a sim_timeout entry 3364 * point so we can attempt recovery? If 3365 * this is only used for dumps, I don't think 3366 * it is. 3367 */ 3368 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3369 } 3370 } else { 3371 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3372 } 3373 crit_exit(); 3374 } 3375 3376 /* 3377 * Schedule a peripheral driver to receive a ccb when it's 3378 * target device has space for more transactions. 3379 */ 3380 void 3381 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3382 { 3383 struct cam_ed *device; 3384 int runq; 3385 3386 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3387 device = perph->path->device; 3388 crit_enter(); 3389 if (periph_is_queued(perph)) { 3390 /* Simply reorder based on new priority */ 3391 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3392 (" change priority to %d\n", new_priority)); 3393 if (new_priority < perph->pinfo.priority) { 3394 camq_change_priority(&device->drvq, 3395 perph->pinfo.index, 3396 new_priority); 3397 } 3398 runq = 0; 3399 } else { 3400 /* New entry on the queue */ 3401 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3402 (" added periph to queue\n")); 3403 perph->pinfo.priority = new_priority; 3404 perph->pinfo.generation = ++device->drvq.generation; 3405 camq_insert(&device->drvq, &perph->pinfo); 3406 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3407 } 3408 crit_exit(); 3409 if (runq != 0) { 3410 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3411 (" calling xpt_run_devq\n")); 3412 xpt_run_dev_allocq(perph->path->bus); 3413 } 3414 } 3415 3416 3417 /* 3418 * Schedule a device to run on a given queue. 3419 * If the device was inserted as a new entry on the queue, 3420 * return 1 meaning the device queue should be run. If we 3421 * were already queued, implying someone else has already 3422 * started the queue, return 0 so the caller doesn't attempt 3423 * to run the queue. Must be run in a critical section. 3424 */ 3425 static int 3426 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3427 u_int32_t new_priority) 3428 { 3429 int retval; 3430 u_int32_t old_priority; 3431 3432 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3433 3434 old_priority = pinfo->priority; 3435 3436 /* 3437 * Are we already queued? 3438 */ 3439 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3440 /* Simply reorder based on new priority */ 3441 if (new_priority < old_priority) { 3442 camq_change_priority(queue, pinfo->index, 3443 new_priority); 3444 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3445 ("changed priority to %d\n", 3446 new_priority)); 3447 } 3448 retval = 0; 3449 } else { 3450 /* New entry on the queue */ 3451 if (new_priority < old_priority) 3452 pinfo->priority = new_priority; 3453 3454 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3455 ("Inserting onto queue\n")); 3456 pinfo->generation = ++queue->generation; 3457 camq_insert(queue, pinfo); 3458 retval = 1; 3459 } 3460 return (retval); 3461 } 3462 3463 static void 3464 xpt_run_dev_allocq(struct cam_eb *bus) 3465 { 3466 struct cam_devq *devq; 3467 3468 if ((devq = bus->sim->devq) == NULL) { 3469 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3470 return; 3471 } 3472 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3473 3474 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3475 (" qfrozen_cnt == 0x%x, entries == %d, " 3476 "openings == %d, active == %d\n", 3477 devq->alloc_queue.qfrozen_cnt, 3478 devq->alloc_queue.entries, 3479 devq->alloc_openings, 3480 devq->alloc_active)); 3481 3482 crit_enter(); 3483 devq->alloc_queue.qfrozen_cnt++; 3484 while ((devq->alloc_queue.entries > 0) 3485 && (devq->alloc_openings > 0) 3486 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3487 struct cam_ed_qinfo *qinfo; 3488 struct cam_ed *device; 3489 union ccb *work_ccb; 3490 struct cam_periph *drv; 3491 struct camq *drvq; 3492 3493 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3494 CAMQ_HEAD); 3495 device = qinfo->device; 3496 3497 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3498 ("running device %p\n", device)); 3499 3500 drvq = &device->drvq; 3501 3502 #ifdef CAMDEBUG 3503 if (drvq->entries <= 0) { 3504 panic("xpt_run_dev_allocq: " 3505 "Device on queue without any work to do"); 3506 } 3507 #endif 3508 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3509 devq->alloc_openings--; 3510 devq->alloc_active++; 3511 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3512 crit_exit(); 3513 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3514 drv->pinfo.priority); 3515 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3516 ("calling periph start\n")); 3517 drv->periph_start(drv, work_ccb); 3518 } else { 3519 /* 3520 * Malloc failure in alloc_ccb 3521 */ 3522 /* 3523 * XXX add us to a list to be run from free_ccb 3524 * if we don't have any ccbs active on this 3525 * device queue otherwise we may never get run 3526 * again. 3527 */ 3528 break; 3529 } 3530 3531 /* Raise IPL for possible insertion and test at top of loop */ 3532 crit_enter(); 3533 3534 if (drvq->entries > 0) { 3535 /* We have more work. Attempt to reschedule */ 3536 xpt_schedule_dev_allocq(bus, device); 3537 } 3538 } 3539 devq->alloc_queue.qfrozen_cnt--; 3540 crit_exit(); 3541 } 3542 3543 static void 3544 xpt_run_dev_sendq(struct cam_eb *bus) 3545 { 3546 struct cam_devq *devq; 3547 3548 if ((devq = bus->sim->devq) == NULL) { 3549 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3550 return; 3551 } 3552 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3553 3554 crit_enter(); 3555 devq->send_queue.qfrozen_cnt++; 3556 while ((devq->send_queue.entries > 0) 3557 && (devq->send_openings > 0)) { 3558 struct cam_ed_qinfo *qinfo; 3559 struct cam_ed *device; 3560 union ccb *work_ccb; 3561 struct cam_sim *sim; 3562 3563 if (devq->send_queue.qfrozen_cnt > 1) { 3564 break; 3565 } 3566 3567 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3568 CAMQ_HEAD); 3569 device = qinfo->device; 3570 3571 /* 3572 * If the device has been "frozen", don't attempt 3573 * to run it. 3574 */ 3575 if (device->qfrozen_cnt > 0) { 3576 continue; 3577 } 3578 3579 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3580 ("running device %p\n", device)); 3581 3582 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3583 if (work_ccb == NULL) { 3584 printf("device on run queue with no ccbs???\n"); 3585 continue; 3586 } 3587 3588 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3589 3590 if (num_highpower <= 0) { 3591 /* 3592 * We got a high power command, but we 3593 * don't have any available slots. Freeze 3594 * the device queue until we have a slot 3595 * available. 3596 */ 3597 device->qfrozen_cnt++; 3598 STAILQ_INSERT_TAIL(&highpowerq, 3599 &work_ccb->ccb_h, 3600 xpt_links.stqe); 3601 3602 continue; 3603 } else { 3604 /* 3605 * Consume a high power slot while 3606 * this ccb runs. 3607 */ 3608 num_highpower--; 3609 } 3610 } 3611 devq->active_dev = device; 3612 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3613 3614 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3615 3616 devq->send_openings--; 3617 devq->send_active++; 3618 3619 if (device->ccbq.queue.entries > 0) 3620 xpt_schedule_dev_sendq(bus, device); 3621 3622 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3623 /* 3624 * The client wants to freeze the queue 3625 * after this CCB is sent. 3626 */ 3627 device->qfrozen_cnt++; 3628 } 3629 3630 /* In Target mode, the peripheral driver knows best... */ 3631 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3632 if ((device->inq_flags & SID_CmdQue) != 0 3633 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3634 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3635 else 3636 /* 3637 * Clear this in case of a retried CCB that 3638 * failed due to a rejected tag. 3639 */ 3640 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3641 } 3642 3643 /* 3644 * Device queues can be shared among multiple sim instances 3645 * that reside on different busses. Use the SIM in the queue 3646 * CCB's path, rather than the one in the bus that was passed 3647 * into this function. 3648 */ 3649 sim = work_ccb->ccb_h.path->bus->sim; 3650 (*(sim->sim_action))(sim, work_ccb); 3651 3652 devq->active_dev = NULL; 3653 /* Raise IPL for possible insertion and test at top of loop */ 3654 } 3655 devq->send_queue.qfrozen_cnt--; 3656 crit_exit(); 3657 } 3658 3659 /* 3660 * This function merges stuff from the slave ccb into the master ccb, while 3661 * keeping important fields in the master ccb constant. 3662 */ 3663 void 3664 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3665 { 3666 /* 3667 * Pull fields that are valid for peripheral drivers to set 3668 * into the master CCB along with the CCB "payload". 3669 */ 3670 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3671 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3672 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3673 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3674 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3675 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3676 } 3677 3678 void 3679 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3680 { 3681 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3682 callout_init(&ccb_h->timeout_ch); 3683 ccb_h->pinfo.priority = priority; 3684 ccb_h->path = path; 3685 ccb_h->path_id = path->bus->path_id; 3686 if (path->target) 3687 ccb_h->target_id = path->target->target_id; 3688 else 3689 ccb_h->target_id = CAM_TARGET_WILDCARD; 3690 if (path->device) { 3691 ccb_h->target_lun = path->device->lun_id; 3692 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3693 } else { 3694 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3695 } 3696 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3697 ccb_h->flags = 0; 3698 } 3699 3700 /* Path manipulation functions */ 3701 cam_status 3702 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3703 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3704 { 3705 struct cam_path *path; 3706 cam_status status; 3707 3708 path = malloc(sizeof(*path), M_DEVBUF, M_INTWAIT); 3709 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3710 if (status != CAM_REQ_CMP) { 3711 free(path, M_DEVBUF); 3712 path = NULL; 3713 } 3714 *new_path_ptr = path; 3715 return (status); 3716 } 3717 3718 static cam_status 3719 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3720 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3721 { 3722 struct cam_eb *bus; 3723 struct cam_et *target; 3724 struct cam_ed *device; 3725 cam_status status; 3726 3727 status = CAM_REQ_CMP; /* Completed without error */ 3728 target = NULL; /* Wildcarded */ 3729 device = NULL; /* Wildcarded */ 3730 3731 /* 3732 * We will potentially modify the EDT, so block interrupts 3733 * that may attempt to create cam paths. 3734 */ 3735 crit_enter(); 3736 bus = xpt_find_bus(path_id); 3737 if (bus == NULL) { 3738 status = CAM_PATH_INVALID; 3739 } else { 3740 target = xpt_find_target(bus, target_id); 3741 if (target == NULL) { 3742 /* Create one */ 3743 struct cam_et *new_target; 3744 3745 new_target = xpt_alloc_target(bus, target_id); 3746 if (new_target == NULL) { 3747 status = CAM_RESRC_UNAVAIL; 3748 } else { 3749 target = new_target; 3750 } 3751 } 3752 if (target != NULL) { 3753 device = xpt_find_device(target, lun_id); 3754 if (device == NULL) { 3755 /* Create one */ 3756 struct cam_ed *new_device; 3757 3758 new_device = xpt_alloc_device(bus, 3759 target, 3760 lun_id); 3761 if (new_device == NULL) { 3762 status = CAM_RESRC_UNAVAIL; 3763 } else { 3764 device = new_device; 3765 } 3766 } 3767 } 3768 } 3769 crit_exit(); 3770 3771 /* 3772 * Only touch the user's data if we are successful. 3773 */ 3774 if (status == CAM_REQ_CMP) { 3775 new_path->periph = perph; 3776 new_path->bus = bus; 3777 new_path->target = target; 3778 new_path->device = device; 3779 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3780 } else { 3781 if (device != NULL) 3782 xpt_release_device(bus, target, device); 3783 if (target != NULL) 3784 xpt_release_target(bus, target); 3785 if (bus != NULL) 3786 xpt_release_bus(bus); 3787 } 3788 return (status); 3789 } 3790 3791 static void 3792 xpt_release_path(struct cam_path *path) 3793 { 3794 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3795 if (path->device != NULL) { 3796 xpt_release_device(path->bus, path->target, path->device); 3797 path->device = NULL; 3798 } 3799 if (path->target != NULL) { 3800 xpt_release_target(path->bus, path->target); 3801 path->target = NULL; 3802 } 3803 if (path->bus != NULL) { 3804 xpt_release_bus(path->bus); 3805 path->bus = NULL; 3806 } 3807 } 3808 3809 void 3810 xpt_free_path(struct cam_path *path) 3811 { 3812 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3813 xpt_release_path(path); 3814 free(path, M_DEVBUF); 3815 } 3816 3817 3818 /* 3819 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3820 * in path1, 2 for match with wildcards in path2. 3821 */ 3822 int 3823 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3824 { 3825 int retval = 0; 3826 3827 if (path1->bus != path2->bus) { 3828 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3829 retval = 1; 3830 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3831 retval = 2; 3832 else 3833 return (-1); 3834 } 3835 if (path1->target != path2->target) { 3836 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3837 if (retval == 0) 3838 retval = 1; 3839 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3840 retval = 2; 3841 else 3842 return (-1); 3843 } 3844 if (path1->device != path2->device) { 3845 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3846 if (retval == 0) 3847 retval = 1; 3848 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3849 retval = 2; 3850 else 3851 return (-1); 3852 } 3853 return (retval); 3854 } 3855 3856 void 3857 xpt_print_path(struct cam_path *path) 3858 { 3859 if (path == NULL) 3860 printf("(nopath): "); 3861 else { 3862 if (path->periph != NULL) 3863 printf("(%s%d:", path->periph->periph_name, 3864 path->periph->unit_number); 3865 else 3866 printf("(noperiph:"); 3867 3868 if (path->bus != NULL) 3869 printf("%s%d:%d:", path->bus->sim->sim_name, 3870 path->bus->sim->unit_number, 3871 path->bus->sim->bus_id); 3872 else 3873 printf("nobus:"); 3874 3875 if (path->target != NULL) 3876 printf("%d:", path->target->target_id); 3877 else 3878 printf("X:"); 3879 3880 if (path->device != NULL) 3881 printf("%d): ", path->device->lun_id); 3882 else 3883 printf("X): "); 3884 } 3885 } 3886 3887 path_id_t 3888 xpt_path_path_id(struct cam_path *path) 3889 { 3890 return(path->bus->path_id); 3891 } 3892 3893 target_id_t 3894 xpt_path_target_id(struct cam_path *path) 3895 { 3896 if (path->target != NULL) 3897 return (path->target->target_id); 3898 else 3899 return (CAM_TARGET_WILDCARD); 3900 } 3901 3902 lun_id_t 3903 xpt_path_lun_id(struct cam_path *path) 3904 { 3905 if (path->device != NULL) 3906 return (path->device->lun_id); 3907 else 3908 return (CAM_LUN_WILDCARD); 3909 } 3910 3911 struct cam_sim * 3912 xpt_path_sim(struct cam_path *path) 3913 { 3914 return (path->bus->sim); 3915 } 3916 3917 struct cam_periph* 3918 xpt_path_periph(struct cam_path *path) 3919 { 3920 return (path->periph); 3921 } 3922 3923 /* 3924 * Release a CAM control block for the caller. Remit the cost of the structure 3925 * to the device referenced by the path. If the this device had no 'credits' 3926 * and peripheral drivers have registered async callbacks for this notification 3927 * call them now. 3928 */ 3929 void 3930 xpt_release_ccb(union ccb *free_ccb) 3931 { 3932 struct cam_path *path; 3933 struct cam_ed *device; 3934 struct cam_eb *bus; 3935 3936 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3937 path = free_ccb->ccb_h.path; 3938 device = path->device; 3939 bus = path->bus; 3940 crit_enter(); 3941 cam_ccbq_release_opening(&device->ccbq); 3942 if (xpt_ccb_count > xpt_max_ccbs) { 3943 xpt_free_ccb(free_ccb); 3944 xpt_ccb_count--; 3945 } else { 3946 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 3947 } 3948 if (bus->sim->devq) { 3949 bus->sim->devq->alloc_openings++; 3950 bus->sim->devq->alloc_active--; 3951 } 3952 /* XXX Turn this into an inline function - xpt_run_device?? */ 3953 if ((device_is_alloc_queued(device) == 0) 3954 && (device->drvq.entries > 0)) { 3955 xpt_schedule_dev_allocq(bus, device); 3956 } 3957 crit_exit(); 3958 if (bus->sim->devq && dev_allocq_is_runnable(bus->sim->devq)) 3959 xpt_run_dev_allocq(bus); 3960 } 3961 3962 /* Functions accessed by SIM drivers */ 3963 3964 /* 3965 * A sim structure, listing the SIM entry points and instance 3966 * identification info is passed to xpt_bus_register to hook the SIM 3967 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3968 * for this new bus and places it in the array of busses and assigns 3969 * it a path_id. The path_id may be influenced by "hard wiring" 3970 * information specified by the user. Once interrupt services are 3971 * availible, the bus will be probed. 3972 */ 3973 int32_t 3974 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 3975 { 3976 struct cam_eb *new_bus; 3977 struct cam_eb *old_bus; 3978 struct ccb_pathinq cpi; 3979 3980 sim->bus_id = bus; 3981 new_bus = malloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT); 3982 3983 if (strcmp(sim->sim_name, "xpt") != 0) { 3984 sim->path_id = 3985 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3986 } 3987 3988 TAILQ_INIT(&new_bus->et_entries); 3989 new_bus->path_id = sim->path_id; 3990 new_bus->sim = sim; 3991 ++sim->refcount; 3992 timevalclear(&new_bus->last_reset); 3993 new_bus->flags = 0; 3994 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3995 new_bus->generation = 0; 3996 crit_enter(); 3997 old_bus = TAILQ_FIRST(&xpt_busses); 3998 while (old_bus != NULL 3999 && old_bus->path_id < new_bus->path_id) 4000 old_bus = TAILQ_NEXT(old_bus, links); 4001 if (old_bus != NULL) 4002 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4003 else 4004 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 4005 bus_generation++; 4006 crit_exit(); 4007 4008 /* Notify interested parties */ 4009 if (sim->path_id != CAM_XPT_PATH_ID) { 4010 struct cam_path path; 4011 4012 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4013 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4014 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4015 cpi.ccb_h.func_code = XPT_PATH_INQ; 4016 xpt_action((union ccb *)&cpi); 4017 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi); 4018 xpt_release_path(&path); 4019 } 4020 return (CAM_SUCCESS); 4021 } 4022 4023 /* 4024 * Deregister a bus. We must clean out all transactions pending on the bus. 4025 * This routine is typically called prior to cam_sim_free() (e.g. see 4026 * dev/usbmisc/umass/umass.c) 4027 */ 4028 int32_t 4029 xpt_bus_deregister(path_id_t pathid) 4030 { 4031 struct cam_path bus_path; 4032 cam_status status; 4033 4034 status = xpt_compile_path(&bus_path, NULL, pathid, 4035 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4036 if (status != CAM_REQ_CMP) 4037 return (status); 4038 4039 /* 4040 * This should clear out all pending requests and timeouts, but 4041 * the ccb's may be queued to a software interrupt. 4042 * 4043 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4044 * and it really ought to. 4045 */ 4046 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4047 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4048 4049 /* make sure all responses have been processed */ 4050 camisr(&cam_netq); 4051 camisr(&cam_bioq); 4052 4053 /* Release the reference count held while registered. */ 4054 xpt_release_bus(bus_path.bus); 4055 xpt_release_path(&bus_path); 4056 4057 return (CAM_REQ_CMP); 4058 } 4059 4060 static path_id_t 4061 xptnextfreepathid(void) 4062 { 4063 struct cam_eb *bus; 4064 path_id_t pathid; 4065 char *strval; 4066 4067 pathid = 0; 4068 bus = TAILQ_FIRST(&xpt_busses); 4069 retry: 4070 /* Find an unoccupied pathid */ 4071 while (bus != NULL 4072 && bus->path_id <= pathid) { 4073 if (bus->path_id == pathid) 4074 pathid++; 4075 bus = TAILQ_NEXT(bus, links); 4076 } 4077 4078 /* 4079 * Ensure that this pathid is not reserved for 4080 * a bus that may be registered in the future. 4081 */ 4082 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4083 ++pathid; 4084 /* Start the search over */ 4085 goto retry; 4086 } 4087 return (pathid); 4088 } 4089 4090 static path_id_t 4091 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4092 { 4093 path_id_t pathid; 4094 int i, dunit, val; 4095 char buf[32], *strval; 4096 4097 pathid = CAM_XPT_PATH_ID; 4098 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4099 i = -1; 4100 while ((i = resource_locate(i, "scbus")) != -1) { 4101 dunit = resource_query_unit(i); 4102 if (dunit < 0) /* unwired?! */ 4103 continue; 4104 if (resource_string_value("scbus", dunit, "at", &strval) != 0) 4105 continue; 4106 if (strcmp(buf, strval) != 0) 4107 continue; 4108 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4109 if (sim_bus == val) { 4110 pathid = dunit; 4111 break; 4112 } 4113 } else if (sim_bus == 0) { 4114 /* Unspecified matches bus 0 */ 4115 pathid = dunit; 4116 break; 4117 } else { 4118 printf("Ambiguous scbus configuration for %s%d " 4119 "bus %d, cannot wire down. The kernel " 4120 "config entry for scbus%d should " 4121 "specify a controller bus.\n" 4122 "Scbus will be assigned dynamically.\n", 4123 sim_name, sim_unit, sim_bus, dunit); 4124 break; 4125 } 4126 } 4127 4128 if (pathid == CAM_XPT_PATH_ID) 4129 pathid = xptnextfreepathid(); 4130 return (pathid); 4131 } 4132 4133 void 4134 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4135 { 4136 struct cam_eb *bus; 4137 struct cam_et *target, *next_target; 4138 struct cam_ed *device, *next_device; 4139 4140 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4141 4142 /* 4143 * Most async events come from a CAM interrupt context. In 4144 * a few cases, the error recovery code at the peripheral layer, 4145 * which may run from our SWI or a process context, may signal 4146 * deferred events with a call to xpt_async. Ensure async 4147 * notifications are serialized by blocking cam interrupts. 4148 */ 4149 crit_enter(); 4150 4151 bus = path->bus; 4152 4153 if (async_code == AC_BUS_RESET) { 4154 /* Update our notion of when the last reset occurred */ 4155 microuptime(&bus->last_reset); 4156 } 4157 4158 for (target = TAILQ_FIRST(&bus->et_entries); 4159 target != NULL; 4160 target = next_target) { 4161 4162 next_target = TAILQ_NEXT(target, links); 4163 4164 if (path->target != target 4165 && path->target->target_id != CAM_TARGET_WILDCARD 4166 && target->target_id != CAM_TARGET_WILDCARD) 4167 continue; 4168 4169 if (async_code == AC_SENT_BDR) { 4170 /* Update our notion of when the last reset occurred */ 4171 microuptime(&path->target->last_reset); 4172 } 4173 4174 for (device = TAILQ_FIRST(&target->ed_entries); 4175 device != NULL; 4176 device = next_device) { 4177 4178 next_device = TAILQ_NEXT(device, links); 4179 4180 if (path->device != device 4181 && path->device->lun_id != CAM_LUN_WILDCARD 4182 && device->lun_id != CAM_LUN_WILDCARD) 4183 continue; 4184 4185 xpt_dev_async(async_code, bus, target, 4186 device, async_arg); 4187 4188 xpt_async_bcast(&device->asyncs, async_code, 4189 path, async_arg); 4190 } 4191 } 4192 4193 /* 4194 * If this wasn't a fully wildcarded async, tell all 4195 * clients that want all async events. 4196 */ 4197 if (bus != xpt_periph->path->bus) 4198 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4199 path, async_arg); 4200 crit_exit(); 4201 } 4202 4203 static void 4204 xpt_async_bcast(struct async_list *async_head, 4205 u_int32_t async_code, 4206 struct cam_path *path, void *async_arg) 4207 { 4208 struct async_node *cur_entry; 4209 4210 cur_entry = SLIST_FIRST(async_head); 4211 while (cur_entry != NULL) { 4212 struct async_node *next_entry; 4213 /* 4214 * Grab the next list entry before we call the current 4215 * entry's callback. This is because the callback function 4216 * can delete its async callback entry. 4217 */ 4218 next_entry = SLIST_NEXT(cur_entry, links); 4219 if ((cur_entry->event_enable & async_code) != 0) 4220 cur_entry->callback(cur_entry->callback_arg, 4221 async_code, path, 4222 async_arg); 4223 cur_entry = next_entry; 4224 } 4225 } 4226 4227 /* 4228 * Handle any per-device event notifications that require action by the XPT. 4229 */ 4230 static void 4231 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4232 struct cam_ed *device, void *async_arg) 4233 { 4234 cam_status status; 4235 struct cam_path newpath; 4236 4237 /* 4238 * We only need to handle events for real devices. 4239 */ 4240 if (target->target_id == CAM_TARGET_WILDCARD 4241 || device->lun_id == CAM_LUN_WILDCARD) 4242 return; 4243 4244 /* 4245 * We need our own path with wildcards expanded to 4246 * handle certain types of events. 4247 */ 4248 if ((async_code == AC_SENT_BDR) 4249 || (async_code == AC_BUS_RESET) 4250 || (async_code == AC_INQ_CHANGED)) 4251 status = xpt_compile_path(&newpath, NULL, 4252 bus->path_id, 4253 target->target_id, 4254 device->lun_id); 4255 else 4256 status = CAM_REQ_CMP_ERR; 4257 4258 if (status == CAM_REQ_CMP) { 4259 4260 /* 4261 * Allow transfer negotiation to occur in a 4262 * tag free environment. 4263 */ 4264 if (async_code == AC_SENT_BDR 4265 || async_code == AC_BUS_RESET) 4266 xpt_toggle_tags(&newpath); 4267 4268 if (async_code == AC_INQ_CHANGED) { 4269 /* 4270 * We've sent a start unit command, or 4271 * something similar to a device that 4272 * may have caused its inquiry data to 4273 * change. So we re-scan the device to 4274 * refresh the inquiry data for it. 4275 */ 4276 xpt_scan_lun(newpath.periph, &newpath, 4277 CAM_EXPECT_INQ_CHANGE, NULL); 4278 } 4279 xpt_release_path(&newpath); 4280 } else if (async_code == AC_LOST_DEVICE) { 4281 /* 4282 * When we lose a device the device may be about to detach 4283 * the sim, we have to clear out all pending timeouts and 4284 * requests before that happens. XXX it would be nice if 4285 * we could abort the requests pertaining to the device. 4286 */ 4287 xpt_release_devq_timeout(device); 4288 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4289 device->flags |= CAM_DEV_UNCONFIGURED; 4290 xpt_release_device(bus, target, device); 4291 } 4292 } else if (async_code == AC_TRANSFER_NEG) { 4293 struct ccb_trans_settings *settings; 4294 4295 settings = (struct ccb_trans_settings *)async_arg; 4296 xpt_set_transfer_settings(settings, device, 4297 /*async_update*/TRUE); 4298 } 4299 } 4300 4301 u_int32_t 4302 xpt_freeze_devq(struct cam_path *path, u_int count) 4303 { 4304 struct ccb_hdr *ccbh; 4305 4306 crit_enter(); 4307 path->device->qfrozen_cnt += count; 4308 4309 /* 4310 * Mark the last CCB in the queue as needing 4311 * to be requeued if the driver hasn't 4312 * changed it's state yet. This fixes a race 4313 * where a ccb is just about to be queued to 4314 * a controller driver when it's interrupt routine 4315 * freezes the queue. To completly close the 4316 * hole, controller drives must check to see 4317 * if a ccb's status is still CAM_REQ_INPROG 4318 * under critical section protection just before they queue 4319 * the CCB. See ahc_action/ahc_freeze_devq for 4320 * an example. 4321 */ 4322 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4323 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4324 ccbh->status = CAM_REQUEUE_REQ; 4325 crit_exit(); 4326 return (path->device->qfrozen_cnt); 4327 } 4328 4329 u_int32_t 4330 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4331 { 4332 if (sim->devq == NULL) 4333 return(count); 4334 sim->devq->send_queue.qfrozen_cnt += count; 4335 if (sim->devq->active_dev != NULL) { 4336 struct ccb_hdr *ccbh; 4337 4338 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4339 ccb_hdr_tailq); 4340 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4341 ccbh->status = CAM_REQUEUE_REQ; 4342 } 4343 return (sim->devq->send_queue.qfrozen_cnt); 4344 } 4345 4346 /* 4347 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4348 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4349 * freed, which is not the case here), but the device queue is also freed XXX 4350 * and we have to check that here. 4351 * 4352 * XXX fixme: could we simply not null-out the device queue via 4353 * cam_sim_free()? 4354 */ 4355 static void 4356 xpt_release_devq_timeout(void *arg) 4357 { 4358 struct cam_ed *device; 4359 4360 device = (struct cam_ed *)arg; 4361 4362 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4363 } 4364 4365 void 4366 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4367 { 4368 xpt_release_devq_device(path->device, count, run_queue); 4369 } 4370 4371 static void 4372 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4373 { 4374 int rundevq; 4375 4376 rundevq = 0; 4377 crit_enter(); 4378 4379 if (dev->qfrozen_cnt > 0) { 4380 4381 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4382 dev->qfrozen_cnt -= count; 4383 if (dev->qfrozen_cnt == 0) { 4384 4385 /* 4386 * No longer need to wait for a successful 4387 * command completion. 4388 */ 4389 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4390 4391 /* 4392 * Remove any timeouts that might be scheduled 4393 * to release this queue. 4394 */ 4395 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4396 callout_stop(&dev->c_handle); 4397 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4398 } 4399 4400 /* 4401 * Now that we are unfrozen schedule the 4402 * device so any pending transactions are 4403 * run. 4404 */ 4405 if ((dev->ccbq.queue.entries > 0) 4406 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4407 && (run_queue != 0)) { 4408 rundevq = 1; 4409 } 4410 } 4411 } 4412 if (rundevq != 0) 4413 xpt_run_dev_sendq(dev->target->bus); 4414 crit_exit(); 4415 } 4416 4417 void 4418 xpt_release_simq(struct cam_sim *sim, int run_queue) 4419 { 4420 struct camq *sendq; 4421 4422 if (sim->devq == NULL) 4423 return; 4424 4425 sendq = &(sim->devq->send_queue); 4426 crit_enter(); 4427 4428 if (sendq->qfrozen_cnt > 0) { 4429 sendq->qfrozen_cnt--; 4430 if (sendq->qfrozen_cnt == 0) { 4431 struct cam_eb *bus; 4432 4433 /* 4434 * If there is a timeout scheduled to release this 4435 * sim queue, remove it. The queue frozen count is 4436 * already at 0. 4437 */ 4438 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4439 callout_stop(&sim->c_handle); 4440 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4441 } 4442 bus = xpt_find_bus(sim->path_id); 4443 crit_exit(); 4444 4445 if (run_queue) { 4446 /* 4447 * Now that we are unfrozen run the send queue. 4448 */ 4449 xpt_run_dev_sendq(bus); 4450 } 4451 xpt_release_bus(bus); 4452 } else { 4453 crit_exit(); 4454 } 4455 } else { 4456 crit_exit(); 4457 } 4458 } 4459 4460 void 4461 xpt_done(union ccb *done_ccb) 4462 { 4463 crit_enter(); 4464 4465 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4466 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4467 /* 4468 * Queue up the request for handling by our SWI handler 4469 * any of the "non-immediate" type of ccbs. 4470 */ 4471 switch (done_ccb->ccb_h.path->periph->type) { 4472 case CAM_PERIPH_BIO: 4473 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4474 sim_links.tqe); 4475 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4476 setsoftcambio(); 4477 break; 4478 case CAM_PERIPH_NET: 4479 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4480 sim_links.tqe); 4481 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4482 setsoftcamnet(); 4483 break; 4484 } 4485 } 4486 crit_exit(); 4487 } 4488 4489 union ccb * 4490 xpt_alloc_ccb() 4491 { 4492 union ccb *new_ccb; 4493 4494 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4495 return (new_ccb); 4496 } 4497 4498 void 4499 xpt_free_ccb(union ccb *free_ccb) 4500 { 4501 free(free_ccb, M_DEVBUF); 4502 } 4503 4504 4505 4506 /* Private XPT functions */ 4507 4508 /* 4509 * Get a CAM control block for the caller. Charge the structure to the device 4510 * referenced by the path. If the this device has no 'credits' then the 4511 * device already has the maximum number of outstanding operations under way 4512 * and we return NULL. If we don't have sufficient resources to allocate more 4513 * ccbs, we also return NULL. 4514 */ 4515 static union ccb * 4516 xpt_get_ccb(struct cam_ed *device) 4517 { 4518 union ccb *new_ccb; 4519 4520 crit_enter(); 4521 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) { 4522 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4523 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4524 xpt_links.sle); 4525 xpt_ccb_count++; 4526 } 4527 cam_ccbq_take_opening(&device->ccbq); 4528 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4529 crit_exit(); 4530 return (new_ccb); 4531 } 4532 4533 static void 4534 xpt_release_bus(struct cam_eb *bus) 4535 { 4536 4537 crit_enter(); 4538 if (bus->refcount == 1) { 4539 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL); 4540 TAILQ_REMOVE(&xpt_busses, bus, links); 4541 if (bus->sim) { 4542 cam_sim_release(bus->sim, 0); 4543 bus->sim = NULL; 4544 } 4545 bus_generation++; 4546 KKASSERT(bus->refcount == 1); 4547 free(bus, M_DEVBUF); 4548 } else { 4549 --bus->refcount; 4550 } 4551 crit_exit(); 4552 } 4553 4554 static struct cam_et * 4555 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4556 { 4557 struct cam_et *target; 4558 struct cam_et *cur_target; 4559 4560 target = malloc(sizeof(*target), M_DEVBUF, M_INTWAIT); 4561 4562 TAILQ_INIT(&target->ed_entries); 4563 target->bus = bus; 4564 target->target_id = target_id; 4565 target->refcount = 1; 4566 target->generation = 0; 4567 timevalclear(&target->last_reset); 4568 /* 4569 * Hold a reference to our parent bus so it 4570 * will not go away before we do. 4571 */ 4572 bus->refcount++; 4573 4574 /* Insertion sort into our bus's target list */ 4575 cur_target = TAILQ_FIRST(&bus->et_entries); 4576 while (cur_target != NULL && cur_target->target_id < target_id) 4577 cur_target = TAILQ_NEXT(cur_target, links); 4578 4579 if (cur_target != NULL) { 4580 TAILQ_INSERT_BEFORE(cur_target, target, links); 4581 } else { 4582 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4583 } 4584 bus->generation++; 4585 return (target); 4586 } 4587 4588 static void 4589 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4590 { 4591 crit_enter(); 4592 if (target->refcount == 1) { 4593 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 4594 TAILQ_REMOVE(&bus->et_entries, target, links); 4595 bus->generation++; 4596 xpt_release_bus(bus); 4597 KKASSERT(target->refcount == 1); 4598 free(target, M_DEVBUF); 4599 } else { 4600 --target->refcount; 4601 } 4602 crit_exit(); 4603 } 4604 4605 static struct cam_ed * 4606 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4607 { 4608 struct cam_ed *device; 4609 struct cam_devq *devq; 4610 cam_status status; 4611 4612 /* Make space for us in the device queue on our bus */ 4613 if (bus->sim->devq == NULL) 4614 return(NULL); 4615 devq = bus->sim->devq; 4616 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4617 4618 if (status != CAM_REQ_CMP) { 4619 device = NULL; 4620 } else { 4621 device = malloc(sizeof(*device), M_DEVBUF, M_INTWAIT); 4622 } 4623 4624 if (device != NULL) { 4625 struct cam_ed *cur_device; 4626 4627 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4628 device->alloc_ccb_entry.device = device; 4629 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4630 device->send_ccb_entry.device = device; 4631 device->target = target; 4632 device->lun_id = lun_id; 4633 /* Initialize our queues */ 4634 if (camq_init(&device->drvq, 0) != 0) { 4635 free(device, M_DEVBUF); 4636 return (NULL); 4637 } 4638 if (cam_ccbq_init(&device->ccbq, 4639 bus->sim->max_dev_openings) != 0) { 4640 camq_fini(&device->drvq); 4641 free(device, M_DEVBUF); 4642 return (NULL); 4643 } 4644 SLIST_INIT(&device->asyncs); 4645 SLIST_INIT(&device->periphs); 4646 device->generation = 0; 4647 device->owner = NULL; 4648 /* 4649 * Take the default quirk entry until we have inquiry 4650 * data and can determine a better quirk to use. 4651 */ 4652 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4653 bzero(&device->inq_data, sizeof(device->inq_data)); 4654 device->inq_flags = 0; 4655 device->queue_flags = 0; 4656 device->serial_num = NULL; 4657 device->serial_num_len = 0; 4658 device->qfrozen_cnt = 0; 4659 device->flags = CAM_DEV_UNCONFIGURED; 4660 device->tag_delay_count = 0; 4661 device->refcount = 1; 4662 callout_init(&device->c_handle); 4663 4664 /* 4665 * Hold a reference to our parent target so it 4666 * will not go away before we do. 4667 */ 4668 target->refcount++; 4669 4670 /* 4671 * XXX should be limited by number of CCBs this bus can 4672 * do. 4673 */ 4674 xpt_max_ccbs += device->ccbq.devq_openings; 4675 /* Insertion sort into our target's device list */ 4676 cur_device = TAILQ_FIRST(&target->ed_entries); 4677 while (cur_device != NULL && cur_device->lun_id < lun_id) 4678 cur_device = TAILQ_NEXT(cur_device, links); 4679 if (cur_device != NULL) { 4680 TAILQ_INSERT_BEFORE(cur_device, device, links); 4681 } else { 4682 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4683 } 4684 target->generation++; 4685 } 4686 return (device); 4687 } 4688 4689 static void 4690 xpt_reference_device(struct cam_ed *device) 4691 { 4692 ++device->refcount; 4693 } 4694 4695 static void 4696 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4697 struct cam_ed *device) 4698 { 4699 struct cam_devq *devq; 4700 4701 crit_enter(); 4702 if (device->refcount == 1) { 4703 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 4704 4705 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4706 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4707 panic("Removing device while still queued for ccbs"); 4708 4709 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4710 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4711 callout_stop(&device->c_handle); 4712 } 4713 4714 TAILQ_REMOVE(&target->ed_entries, device,links); 4715 target->generation++; 4716 xpt_max_ccbs -= device->ccbq.devq_openings; 4717 /* Release our slot in the devq */ 4718 devq = bus->sim->devq; 4719 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4720 xpt_release_target(bus, target); 4721 KKASSERT(device->refcount == 1); 4722 free(device, M_DEVBUF); 4723 } else { 4724 --device->refcount; 4725 } 4726 crit_exit(); 4727 } 4728 4729 static u_int32_t 4730 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4731 { 4732 int diff; 4733 int result; 4734 struct cam_ed *dev; 4735 4736 dev = path->device; 4737 4738 crit_enter(); 4739 4740 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4741 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4742 if (result == CAM_REQ_CMP && (diff < 0)) { 4743 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4744 } 4745 /* Adjust the global limit */ 4746 xpt_max_ccbs += diff; 4747 crit_exit(); 4748 return (result); 4749 } 4750 4751 static struct cam_eb * 4752 xpt_find_bus(path_id_t path_id) 4753 { 4754 struct cam_eb *bus; 4755 4756 for (bus = TAILQ_FIRST(&xpt_busses); 4757 bus != NULL; 4758 bus = TAILQ_NEXT(bus, links)) { 4759 if (bus->path_id == path_id) { 4760 bus->refcount++; 4761 break; 4762 } 4763 } 4764 return (bus); 4765 } 4766 4767 static struct cam_et * 4768 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4769 { 4770 struct cam_et *target; 4771 4772 for (target = TAILQ_FIRST(&bus->et_entries); 4773 target != NULL; 4774 target = TAILQ_NEXT(target, links)) { 4775 if (target->target_id == target_id) { 4776 target->refcount++; 4777 break; 4778 } 4779 } 4780 return (target); 4781 } 4782 4783 static struct cam_ed * 4784 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4785 { 4786 struct cam_ed *device; 4787 4788 for (device = TAILQ_FIRST(&target->ed_entries); 4789 device != NULL; 4790 device = TAILQ_NEXT(device, links)) { 4791 if (device->lun_id == lun_id) { 4792 device->refcount++; 4793 break; 4794 } 4795 } 4796 return (device); 4797 } 4798 4799 typedef struct { 4800 union ccb *request_ccb; 4801 struct ccb_pathinq *cpi; 4802 int pending_count; 4803 } xpt_scan_bus_info; 4804 4805 /* 4806 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4807 * As the scan progresses, xpt_scan_bus is used as the 4808 * callback on completion function. 4809 */ 4810 static void 4811 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 4812 { 4813 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4814 ("xpt_scan_bus\n")); 4815 switch (request_ccb->ccb_h.func_code) { 4816 case XPT_SCAN_BUS: 4817 { 4818 xpt_scan_bus_info *scan_info; 4819 union ccb *work_ccb; 4820 struct cam_path *path; 4821 u_int i; 4822 u_int max_target; 4823 u_int initiator_id; 4824 4825 /* Find out the characteristics of the bus */ 4826 work_ccb = xpt_alloc_ccb(); 4827 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 4828 request_ccb->ccb_h.pinfo.priority); 4829 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4830 xpt_action(work_ccb); 4831 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4832 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 4833 xpt_free_ccb(work_ccb); 4834 xpt_done(request_ccb); 4835 return; 4836 } 4837 4838 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4839 /* 4840 * Can't scan the bus on an adapter that 4841 * cannot perform the initiator role. 4842 */ 4843 request_ccb->ccb_h.status = CAM_REQ_CMP; 4844 xpt_free_ccb(work_ccb); 4845 xpt_done(request_ccb); 4846 return; 4847 } 4848 4849 /* Save some state for use while we probe for devices */ 4850 scan_info = (xpt_scan_bus_info *) 4851 malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT); 4852 scan_info->request_ccb = request_ccb; 4853 scan_info->cpi = &work_ccb->cpi; 4854 4855 /* Cache on our stack so we can work asynchronously */ 4856 max_target = scan_info->cpi->max_target; 4857 initiator_id = scan_info->cpi->initiator_id; 4858 4859 /* 4860 * Don't count the initiator if the 4861 * initiator is addressable. 4862 */ 4863 scan_info->pending_count = max_target + 1; 4864 if (initiator_id <= max_target) 4865 scan_info->pending_count--; 4866 4867 for (i = 0; i <= max_target; i++) { 4868 cam_status status; 4869 if (i == initiator_id) 4870 continue; 4871 4872 status = xpt_create_path(&path, xpt_periph, 4873 request_ccb->ccb_h.path_id, 4874 i, 0); 4875 if (status != CAM_REQ_CMP) { 4876 printf("xpt_scan_bus: xpt_create_path failed" 4877 " with status %#x, bus scan halted\n", 4878 status); 4879 break; 4880 } 4881 work_ccb = xpt_alloc_ccb(); 4882 xpt_setup_ccb(&work_ccb->ccb_h, path, 4883 request_ccb->ccb_h.pinfo.priority); 4884 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4885 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4886 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 4887 work_ccb->crcn.flags = request_ccb->crcn.flags; 4888 #if 0 4889 printf("xpt_scan_bus: probing %d:%d:%d\n", 4890 request_ccb->ccb_h.path_id, i, 0); 4891 #endif 4892 xpt_action(work_ccb); 4893 } 4894 break; 4895 } 4896 case XPT_SCAN_LUN: 4897 { 4898 xpt_scan_bus_info *scan_info; 4899 path_id_t path_id; 4900 target_id_t target_id; 4901 lun_id_t lun_id; 4902 4903 /* Reuse the same CCB to query if a device was really found */ 4904 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 4905 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 4906 request_ccb->ccb_h.pinfo.priority); 4907 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 4908 4909 path_id = request_ccb->ccb_h.path_id; 4910 target_id = request_ccb->ccb_h.target_id; 4911 lun_id = request_ccb->ccb_h.target_lun; 4912 xpt_action(request_ccb); 4913 4914 #if 0 4915 printf("xpt_scan_bus: got back probe from %d:%d:%d\n", 4916 path_id, target_id, lun_id); 4917 #endif 4918 4919 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 4920 struct cam_ed *device; 4921 struct cam_et *target; 4922 int phl; 4923 4924 /* 4925 * If we already probed lun 0 successfully, or 4926 * we have additional configured luns on this 4927 * target that might have "gone away", go onto 4928 * the next lun. 4929 */ 4930 target = request_ccb->ccb_h.path->target; 4931 /* 4932 * We may touch devices that we don't 4933 * hold references too, so ensure they 4934 * don't disappear out from under us. 4935 * The target above is referenced by the 4936 * path in the request ccb. 4937 */ 4938 phl = 0; 4939 crit_enter(); 4940 device = TAILQ_FIRST(&target->ed_entries); 4941 if (device != NULL) { 4942 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 4943 if (device->lun_id == 0) 4944 device = TAILQ_NEXT(device, links); 4945 } 4946 crit_exit(); 4947 if ((lun_id != 0) || (device != NULL)) { 4948 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 4949 lun_id++; 4950 } 4951 } else { 4952 struct cam_ed *device; 4953 4954 device = request_ccb->ccb_h.path->device; 4955 4956 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 4957 /* Try the next lun */ 4958 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 4959 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 4960 lun_id++; 4961 } 4962 } 4963 4964 xpt_free_path(request_ccb->ccb_h.path); 4965 4966 /* Check Bounds */ 4967 if ((lun_id == request_ccb->ccb_h.target_lun) 4968 || lun_id > scan_info->cpi->max_lun) { 4969 /* We're done */ 4970 4971 xpt_free_ccb(request_ccb); 4972 scan_info->pending_count--; 4973 if (scan_info->pending_count == 0) { 4974 xpt_free_ccb((union ccb *)scan_info->cpi); 4975 request_ccb = scan_info->request_ccb; 4976 free(scan_info, M_TEMP); 4977 request_ccb->ccb_h.status = CAM_REQ_CMP; 4978 xpt_done(request_ccb); 4979 } 4980 } else { 4981 /* Try the next device */ 4982 struct cam_path *path; 4983 cam_status status; 4984 4985 path = request_ccb->ccb_h.path; 4986 status = xpt_create_path(&path, xpt_periph, 4987 path_id, target_id, lun_id); 4988 if (status != CAM_REQ_CMP) { 4989 printf("xpt_scan_bus: xpt_create_path failed " 4990 "with status %#x, halting LUN scan\n", 4991 status); 4992 xpt_free_ccb(request_ccb); 4993 scan_info->pending_count--; 4994 if (scan_info->pending_count == 0) { 4995 xpt_free_ccb( 4996 (union ccb *)scan_info->cpi); 4997 request_ccb = scan_info->request_ccb; 4998 free(scan_info, M_TEMP); 4999 request_ccb->ccb_h.status = CAM_REQ_CMP; 5000 xpt_done(request_ccb); 5001 break; 5002 } 5003 } 5004 xpt_setup_ccb(&request_ccb->ccb_h, path, 5005 request_ccb->ccb_h.pinfo.priority); 5006 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5007 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5008 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5009 request_ccb->crcn.flags = 5010 scan_info->request_ccb->crcn.flags; 5011 #if 0 5012 xpt_print_path(path); 5013 printf("xpt_scan bus probing\n"); 5014 #endif 5015 xpt_action(request_ccb); 5016 } 5017 break; 5018 } 5019 default: 5020 break; 5021 } 5022 } 5023 5024 typedef enum { 5025 PROBE_TUR, 5026 PROBE_INQUIRY, 5027 PROBE_FULL_INQUIRY, 5028 PROBE_MODE_SENSE, 5029 PROBE_SERIAL_NUM, 5030 PROBE_TUR_FOR_NEGOTIATION 5031 } probe_action; 5032 5033 typedef enum { 5034 PROBE_INQUIRY_CKSUM = 0x01, 5035 PROBE_SERIAL_CKSUM = 0x02, 5036 PROBE_NO_ANNOUNCE = 0x04 5037 } probe_flags; 5038 5039 typedef struct { 5040 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5041 probe_action action; 5042 union ccb saved_ccb; 5043 probe_flags flags; 5044 MD5_CTX context; 5045 u_int8_t digest[16]; 5046 } probe_softc; 5047 5048 static void 5049 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5050 cam_flags flags, union ccb *request_ccb) 5051 { 5052 struct ccb_pathinq cpi; 5053 cam_status status; 5054 struct cam_path *new_path; 5055 struct cam_periph *old_periph; 5056 5057 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5058 ("xpt_scan_lun\n")); 5059 5060 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5061 cpi.ccb_h.func_code = XPT_PATH_INQ; 5062 xpt_action((union ccb *)&cpi); 5063 5064 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5065 if (request_ccb != NULL) { 5066 request_ccb->ccb_h.status = cpi.ccb_h.status; 5067 xpt_done(request_ccb); 5068 } 5069 return; 5070 } 5071 5072 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5073 /* 5074 * Can't scan the bus on an adapter that 5075 * cannot perform the initiator role. 5076 */ 5077 if (request_ccb != NULL) { 5078 request_ccb->ccb_h.status = CAM_REQ_CMP; 5079 xpt_done(request_ccb); 5080 } 5081 return; 5082 } 5083 5084 if (request_ccb == NULL) { 5085 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_INTWAIT); 5086 new_path = malloc(sizeof(*new_path), M_TEMP, M_INTWAIT); 5087 status = xpt_compile_path(new_path, xpt_periph, 5088 path->bus->path_id, 5089 path->target->target_id, 5090 path->device->lun_id); 5091 5092 if (status != CAM_REQ_CMP) { 5093 xpt_print_path(path); 5094 printf("xpt_scan_lun: can't compile path, can't " 5095 "continue\n"); 5096 free(request_ccb, M_TEMP); 5097 free(new_path, M_TEMP); 5098 return; 5099 } 5100 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5101 request_ccb->ccb_h.cbfcnp = xptscandone; 5102 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5103 request_ccb->crcn.flags = flags; 5104 } 5105 5106 crit_enter(); 5107 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5108 probe_softc *softc; 5109 5110 softc = (probe_softc *)old_periph->softc; 5111 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5112 periph_links.tqe); 5113 } else { 5114 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5115 probestart, "probe", 5116 CAM_PERIPH_BIO, 5117 request_ccb->ccb_h.path, NULL, 0, 5118 request_ccb); 5119 5120 if (status != CAM_REQ_CMP) { 5121 xpt_print_path(path); 5122 printf("xpt_scan_lun: cam_alloc_periph returned an " 5123 "error, can't continue probe\n"); 5124 request_ccb->ccb_h.status = status; 5125 xpt_done(request_ccb); 5126 } 5127 } 5128 crit_exit(); 5129 } 5130 5131 static void 5132 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5133 { 5134 xpt_release_path(done_ccb->ccb_h.path); 5135 free(done_ccb->ccb_h.path, M_TEMP); 5136 free(done_ccb, M_TEMP); 5137 } 5138 5139 static cam_status 5140 proberegister(struct cam_periph *periph, void *arg) 5141 { 5142 union ccb *request_ccb; /* CCB representing the probe request */ 5143 probe_softc *softc; 5144 5145 request_ccb = (union ccb *)arg; 5146 if (periph == NULL) { 5147 printf("proberegister: periph was NULL!!\n"); 5148 return(CAM_REQ_CMP_ERR); 5149 } 5150 5151 if (request_ccb == NULL) { 5152 printf("proberegister: no probe CCB, " 5153 "can't register device\n"); 5154 return(CAM_REQ_CMP_ERR); 5155 } 5156 5157 softc = malloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO); 5158 TAILQ_INIT(&softc->request_ccbs); 5159 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5160 periph_links.tqe); 5161 softc->flags = 0; 5162 periph->softc = softc; 5163 cam_periph_acquire(periph); 5164 /* 5165 * Ensure we've waited at least a bus settle 5166 * delay before attempting to probe the device. 5167 * For HBAs that don't do bus resets, this won't make a difference. 5168 */ 5169 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5170 SCSI_DELAY); 5171 probeschedule(periph); 5172 return(CAM_REQ_CMP); 5173 } 5174 5175 static void 5176 probeschedule(struct cam_periph *periph) 5177 { 5178 struct ccb_pathinq cpi; 5179 union ccb *ccb; 5180 probe_softc *softc; 5181 5182 softc = (probe_softc *)periph->softc; 5183 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5184 5185 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5186 cpi.ccb_h.func_code = XPT_PATH_INQ; 5187 xpt_action((union ccb *)&cpi); 5188 5189 /* 5190 * If a device has gone away and another device, or the same one, 5191 * is back in the same place, it should have a unit attention 5192 * condition pending. It will not report the unit attention in 5193 * response to an inquiry, which may leave invalid transfer 5194 * negotiations in effect. The TUR will reveal the unit attention 5195 * condition. Only send the TUR for lun 0, since some devices 5196 * will get confused by commands other than inquiry to non-existent 5197 * luns. If you think a device has gone away start your scan from 5198 * lun 0. This will insure that any bogus transfer settings are 5199 * invalidated. 5200 * 5201 * If we haven't seen the device before and the controller supports 5202 * some kind of transfer negotiation, negotiate with the first 5203 * sent command if no bus reset was performed at startup. This 5204 * ensures that the device is not confused by transfer negotiation 5205 * settings left over by loader or BIOS action. 5206 */ 5207 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5208 && (ccb->ccb_h.target_lun == 0)) { 5209 softc->action = PROBE_TUR; 5210 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5211 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5212 proberequestdefaultnegotiation(periph); 5213 softc->action = PROBE_INQUIRY; 5214 } else { 5215 softc->action = PROBE_INQUIRY; 5216 } 5217 5218 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5219 softc->flags |= PROBE_NO_ANNOUNCE; 5220 else 5221 softc->flags &= ~PROBE_NO_ANNOUNCE; 5222 5223 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5224 } 5225 5226 static void 5227 probestart(struct cam_periph *periph, union ccb *start_ccb) 5228 { 5229 /* Probe the device that our peripheral driver points to */ 5230 struct ccb_scsiio *csio; 5231 probe_softc *softc; 5232 5233 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5234 5235 softc = (probe_softc *)periph->softc; 5236 csio = &start_ccb->csio; 5237 5238 switch (softc->action) { 5239 case PROBE_TUR: 5240 case PROBE_TUR_FOR_NEGOTIATION: 5241 { 5242 scsi_test_unit_ready(csio, 5243 /*retries*/4, 5244 probedone, 5245 MSG_SIMPLE_Q_TAG, 5246 SSD_FULL_SIZE, 5247 /*timeout*/60000); 5248 break; 5249 } 5250 case PROBE_INQUIRY: 5251 case PROBE_FULL_INQUIRY: 5252 { 5253 u_int inquiry_len; 5254 struct scsi_inquiry_data *inq_buf; 5255 5256 inq_buf = &periph->path->device->inq_data; 5257 /* 5258 * If the device is currently configured, we calculate an 5259 * MD5 checksum of the inquiry data, and if the serial number 5260 * length is greater than 0, add the serial number data 5261 * into the checksum as well. Once the inquiry and the 5262 * serial number check finish, we attempt to figure out 5263 * whether we still have the same device. 5264 */ 5265 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5266 5267 MD5Init(&softc->context); 5268 MD5Update(&softc->context, (unsigned char *)inq_buf, 5269 sizeof(struct scsi_inquiry_data)); 5270 softc->flags |= PROBE_INQUIRY_CKSUM; 5271 if (periph->path->device->serial_num_len > 0) { 5272 MD5Update(&softc->context, 5273 periph->path->device->serial_num, 5274 periph->path->device->serial_num_len); 5275 softc->flags |= PROBE_SERIAL_CKSUM; 5276 } 5277 MD5Final(softc->digest, &softc->context); 5278 } 5279 5280 if (softc->action == PROBE_INQUIRY) 5281 inquiry_len = SHORT_INQUIRY_LENGTH; 5282 else 5283 inquiry_len = inq_buf->additional_length + 5; 5284 5285 scsi_inquiry(csio, 5286 /*retries*/4, 5287 probedone, 5288 MSG_SIMPLE_Q_TAG, 5289 (u_int8_t *)inq_buf, 5290 inquiry_len, 5291 /*evpd*/FALSE, 5292 /*page_code*/0, 5293 SSD_MIN_SIZE, 5294 /*timeout*/60 * 1000); 5295 break; 5296 } 5297 case PROBE_MODE_SENSE: 5298 { 5299 void *mode_buf; 5300 int mode_buf_len; 5301 5302 mode_buf_len = sizeof(struct scsi_mode_header_6) 5303 + sizeof(struct scsi_mode_blk_desc) 5304 + sizeof(struct scsi_control_page); 5305 mode_buf = malloc(mode_buf_len, M_TEMP, M_INTWAIT); 5306 scsi_mode_sense(csio, 5307 /*retries*/4, 5308 probedone, 5309 MSG_SIMPLE_Q_TAG, 5310 /*dbd*/FALSE, 5311 SMS_PAGE_CTRL_CURRENT, 5312 SMS_CONTROL_MODE_PAGE, 5313 mode_buf, 5314 mode_buf_len, 5315 SSD_FULL_SIZE, 5316 /*timeout*/60000); 5317 break; 5318 } 5319 case PROBE_SERIAL_NUM: 5320 { 5321 struct scsi_vpd_unit_serial_number *serial_buf; 5322 struct cam_ed* device; 5323 5324 serial_buf = NULL; 5325 device = periph->path->device; 5326 device->serial_num = NULL; 5327 device->serial_num_len = 0; 5328 5329 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5330 serial_buf = malloc(sizeof(*serial_buf), M_TEMP, 5331 M_INTWAIT | M_ZERO); 5332 scsi_inquiry(csio, 5333 /*retries*/4, 5334 probedone, 5335 MSG_SIMPLE_Q_TAG, 5336 (u_int8_t *)serial_buf, 5337 sizeof(*serial_buf), 5338 /*evpd*/TRUE, 5339 SVPD_UNIT_SERIAL_NUMBER, 5340 SSD_MIN_SIZE, 5341 /*timeout*/60 * 1000); 5342 break; 5343 } 5344 /* 5345 * We'll have to do without, let our probedone 5346 * routine finish up for us. 5347 */ 5348 start_ccb->csio.data_ptr = NULL; 5349 probedone(periph, start_ccb); 5350 return; 5351 } 5352 } 5353 xpt_action(start_ccb); 5354 } 5355 5356 static void 5357 proberequestdefaultnegotiation(struct cam_periph *periph) 5358 { 5359 struct ccb_trans_settings cts; 5360 5361 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5362 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5363 cts.flags = CCB_TRANS_USER_SETTINGS; 5364 xpt_action((union ccb *)&cts); 5365 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5366 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5367 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5368 xpt_action((union ccb *)&cts); 5369 } 5370 5371 static void 5372 probedone(struct cam_periph *periph, union ccb *done_ccb) 5373 { 5374 probe_softc *softc; 5375 struct cam_path *path; 5376 u_int32_t priority; 5377 5378 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5379 5380 softc = (probe_softc *)periph->softc; 5381 path = done_ccb->ccb_h.path; 5382 priority = done_ccb->ccb_h.pinfo.priority; 5383 5384 switch (softc->action) { 5385 case PROBE_TUR: 5386 { 5387 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5388 5389 if (cam_periph_error(done_ccb, 0, 5390 SF_NO_PRINT, NULL) == ERESTART) 5391 return; 5392 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5393 /* Don't wedge the queue */ 5394 xpt_release_devq(done_ccb->ccb_h.path, 5395 /*count*/1, 5396 /*run_queue*/TRUE); 5397 } 5398 softc->action = PROBE_INQUIRY; 5399 xpt_release_ccb(done_ccb); 5400 xpt_schedule(periph, priority); 5401 return; 5402 } 5403 case PROBE_INQUIRY: 5404 case PROBE_FULL_INQUIRY: 5405 { 5406 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5407 struct scsi_inquiry_data *inq_buf; 5408 u_int8_t periph_qual; 5409 5410 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5411 inq_buf = &path->device->inq_data; 5412 5413 periph_qual = SID_QUAL(inq_buf); 5414 5415 switch(periph_qual) { 5416 case SID_QUAL_LU_CONNECTED: 5417 { 5418 u_int8_t alen; 5419 5420 /* 5421 * We conservatively request only 5422 * SHORT_INQUIRY_LEN bytes of inquiry 5423 * information during our first try 5424 * at sending an INQUIRY. If the device 5425 * has more information to give, 5426 * perform a second request specifying 5427 * the amount of information the device 5428 * is willing to give. 5429 */ 5430 alen = inq_buf->additional_length; 5431 if (softc->action == PROBE_INQUIRY 5432 && alen > (SHORT_INQUIRY_LENGTH - 5)) { 5433 softc->action = PROBE_FULL_INQUIRY; 5434 xpt_release_ccb(done_ccb); 5435 xpt_schedule(periph, priority); 5436 return; 5437 } 5438 5439 xpt_find_quirk(path->device); 5440 5441 if ((inq_buf->flags & SID_CmdQue) != 0) 5442 softc->action = PROBE_MODE_SENSE; 5443 else 5444 softc->action = PROBE_SERIAL_NUM; 5445 5446 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5447 xpt_reference_device(path->device); 5448 5449 xpt_release_ccb(done_ccb); 5450 xpt_schedule(periph, priority); 5451 return; 5452 } 5453 default: 5454 break; 5455 } 5456 } else if (cam_periph_error(done_ccb, 0, 5457 done_ccb->ccb_h.target_lun > 0 5458 ? SF_RETRY_UA|SF_QUIET_IR 5459 : SF_RETRY_UA, 5460 &softc->saved_ccb) == ERESTART) { 5461 return; 5462 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5463 /* Don't wedge the queue */ 5464 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5465 /*run_queue*/TRUE); 5466 } 5467 /* 5468 * If we get to this point, we got an error status back 5469 * from the inquiry and the error status doesn't require 5470 * automatically retrying the command. Therefore, the 5471 * inquiry failed. If we had inquiry information before 5472 * for this device, but this latest inquiry command failed, 5473 * the device has probably gone away. If this device isn't 5474 * already marked unconfigured, notify the peripheral 5475 * drivers that this device is no more. 5476 */ 5477 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5478 /* Send the async notification. */ 5479 xpt_async(AC_LOST_DEVICE, path, NULL); 5480 } 5481 5482 xpt_release_ccb(done_ccb); 5483 break; 5484 } 5485 case PROBE_MODE_SENSE: 5486 { 5487 struct ccb_scsiio *csio; 5488 struct scsi_mode_header_6 *mode_hdr; 5489 5490 csio = &done_ccb->csio; 5491 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5492 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5493 struct scsi_control_page *page; 5494 u_int8_t *offset; 5495 5496 offset = ((u_int8_t *)&mode_hdr[1]) 5497 + mode_hdr->blk_desc_len; 5498 page = (struct scsi_control_page *)offset; 5499 path->device->queue_flags = page->queue_flags; 5500 } else if (cam_periph_error(done_ccb, 0, 5501 SF_RETRY_UA|SF_NO_PRINT, 5502 &softc->saved_ccb) == ERESTART) { 5503 return; 5504 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5505 /* Don't wedge the queue */ 5506 xpt_release_devq(done_ccb->ccb_h.path, 5507 /*count*/1, /*run_queue*/TRUE); 5508 } 5509 xpt_release_ccb(done_ccb); 5510 free(mode_hdr, M_TEMP); 5511 softc->action = PROBE_SERIAL_NUM; 5512 xpt_schedule(periph, priority); 5513 return; 5514 } 5515 case PROBE_SERIAL_NUM: 5516 { 5517 struct ccb_scsiio *csio; 5518 struct scsi_vpd_unit_serial_number *serial_buf; 5519 u_int32_t priority; 5520 int changed; 5521 int have_serialnum; 5522 5523 changed = 1; 5524 have_serialnum = 0; 5525 csio = &done_ccb->csio; 5526 priority = done_ccb->ccb_h.pinfo.priority; 5527 serial_buf = 5528 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5529 5530 /* Clean up from previous instance of this device */ 5531 if (path->device->serial_num != NULL) { 5532 free(path->device->serial_num, M_DEVBUF); 5533 path->device->serial_num = NULL; 5534 path->device->serial_num_len = 0; 5535 } 5536 5537 if (serial_buf == NULL) { 5538 /* 5539 * Don't process the command as it was never sent 5540 */ 5541 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5542 && (serial_buf->length > 0)) { 5543 5544 have_serialnum = 1; 5545 path->device->serial_num = 5546 malloc((serial_buf->length + 1), 5547 M_DEVBUF, M_INTWAIT); 5548 bcopy(serial_buf->serial_num, 5549 path->device->serial_num, 5550 serial_buf->length); 5551 path->device->serial_num_len = serial_buf->length; 5552 path->device->serial_num[serial_buf->length] = '\0'; 5553 } else if (cam_periph_error(done_ccb, 0, 5554 SF_RETRY_UA|SF_NO_PRINT, 5555 &softc->saved_ccb) == ERESTART) { 5556 return; 5557 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5558 /* Don't wedge the queue */ 5559 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5560 /*run_queue*/TRUE); 5561 } 5562 5563 /* 5564 * Let's see if we have seen this device before. 5565 */ 5566 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5567 MD5_CTX context; 5568 u_int8_t digest[16]; 5569 5570 MD5Init(&context); 5571 5572 MD5Update(&context, 5573 (unsigned char *)&path->device->inq_data, 5574 sizeof(struct scsi_inquiry_data)); 5575 5576 if (have_serialnum) 5577 MD5Update(&context, serial_buf->serial_num, 5578 serial_buf->length); 5579 5580 MD5Final(digest, &context); 5581 if (bcmp(softc->digest, digest, 16) == 0) 5582 changed = 0; 5583 5584 /* 5585 * XXX Do we need to do a TUR in order to ensure 5586 * that the device really hasn't changed??? 5587 */ 5588 if ((changed != 0) 5589 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5590 xpt_async(AC_LOST_DEVICE, path, NULL); 5591 } 5592 if (serial_buf != NULL) 5593 free(serial_buf, M_TEMP); 5594 5595 if (changed != 0) { 5596 /* 5597 * Now that we have all the necessary 5598 * information to safely perform transfer 5599 * negotiations... Controllers don't perform 5600 * any negotiation or tagged queuing until 5601 * after the first XPT_SET_TRAN_SETTINGS ccb is 5602 * received. So, on a new device, just retreive 5603 * the user settings, and set them as the current 5604 * settings to set the device up. 5605 */ 5606 proberequestdefaultnegotiation(periph); 5607 xpt_release_ccb(done_ccb); 5608 5609 /* 5610 * Perform a TUR to allow the controller to 5611 * perform any necessary transfer negotiation. 5612 */ 5613 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5614 xpt_schedule(periph, priority); 5615 return; 5616 } 5617 xpt_release_ccb(done_ccb); 5618 break; 5619 } 5620 case PROBE_TUR_FOR_NEGOTIATION: 5621 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5622 /* Don't wedge the queue */ 5623 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5624 /*run_queue*/TRUE); 5625 } 5626 5627 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5628 xpt_reference_device(path->device); 5629 5630 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5631 /* Inform the XPT that a new device has been found */ 5632 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5633 xpt_action(done_ccb); 5634 5635 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5636 } 5637 xpt_release_ccb(done_ccb); 5638 break; 5639 } 5640 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5641 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5642 done_ccb->ccb_h.status = CAM_REQ_CMP; 5643 xpt_done(done_ccb); 5644 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5645 cam_periph_invalidate(periph); 5646 cam_periph_release(periph); 5647 } else { 5648 probeschedule(periph); 5649 } 5650 } 5651 5652 static void 5653 probecleanup(struct cam_periph *periph) 5654 { 5655 free(periph->softc, M_TEMP); 5656 } 5657 5658 static void 5659 xpt_find_quirk(struct cam_ed *device) 5660 { 5661 caddr_t match; 5662 5663 match = cam_quirkmatch((caddr_t)&device->inq_data, 5664 (caddr_t)xpt_quirk_table, 5665 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5666 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5667 5668 if (match == NULL) 5669 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5670 5671 device->quirk = (struct xpt_quirk_entry *)match; 5672 } 5673 5674 static void 5675 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5676 int async_update) 5677 { 5678 struct cam_sim *sim; 5679 int qfrozen; 5680 5681 sim = cts->ccb_h.path->bus->sim; 5682 if (async_update == FALSE) { 5683 struct scsi_inquiry_data *inq_data; 5684 struct ccb_pathinq cpi; 5685 struct ccb_trans_settings cur_cts; 5686 5687 if (device == NULL) { 5688 cts->ccb_h.status = CAM_PATH_INVALID; 5689 xpt_done((union ccb *)cts); 5690 return; 5691 } 5692 5693 /* 5694 * Perform sanity checking against what the 5695 * controller and device can do. 5696 */ 5697 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 5698 cpi.ccb_h.func_code = XPT_PATH_INQ; 5699 xpt_action((union ccb *)&cpi); 5700 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 5701 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5702 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 5703 xpt_action((union ccb *)&cur_cts); 5704 inq_data = &device->inq_data; 5705 5706 /* Fill in any gaps in what the user gave us */ 5707 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 5708 cts->sync_period = cur_cts.sync_period; 5709 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 5710 cts->sync_offset = cur_cts.sync_offset; 5711 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 5712 cts->bus_width = cur_cts.bus_width; 5713 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 5714 cts->flags &= ~CCB_TRANS_DISC_ENB; 5715 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 5716 } 5717 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 5718 cts->flags &= ~CCB_TRANS_TAG_ENB; 5719 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 5720 } 5721 5722 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 5723 && (inq_data->flags & SID_Sync) == 0) 5724 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 5725 || (cts->sync_offset == 0) 5726 || (cts->sync_period == 0)) { 5727 /* Force async */ 5728 cts->sync_period = 0; 5729 cts->sync_offset = 0; 5730 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) { 5731 5732 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 5733 && cts->sync_period <= 0x9) { 5734 /* 5735 * Don't allow DT transmission rates if the 5736 * device does not support it. 5737 */ 5738 cts->sync_period = 0xa; 5739 } 5740 if ((inq_data->spi3data & SID_SPI_IUS) == 0 5741 && cts->sync_period <= 0x8) { 5742 /* 5743 * Don't allow PACE transmission rates 5744 * if the device does support packetized 5745 * transfers. 5746 */ 5747 cts->sync_period = 0x9; 5748 } 5749 } 5750 5751 switch (cts->bus_width) { 5752 case MSG_EXT_WDTR_BUS_32_BIT: 5753 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5754 || (inq_data->flags & SID_WBus32) != 0) 5755 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 5756 break; 5757 /* Fall Through to 16-bit */ 5758 case MSG_EXT_WDTR_BUS_16_BIT: 5759 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5760 || (inq_data->flags & SID_WBus16) != 0) 5761 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 5762 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 5763 break; 5764 } 5765 /* Fall Through to 8-bit */ 5766 default: /* New bus width?? */ 5767 case MSG_EXT_WDTR_BUS_8_BIT: 5768 /* All targets can do this */ 5769 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 5770 break; 5771 } 5772 5773 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 5774 /* 5775 * Can't tag queue without disconnection. 5776 */ 5777 cts->flags &= ~CCB_TRANS_TAG_ENB; 5778 cts->valid |= CCB_TRANS_TQ_VALID; 5779 } 5780 5781 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 5782 || (inq_data->flags & SID_CmdQue) == 0 5783 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 5784 || (device->quirk->mintags == 0)) { 5785 /* 5786 * Can't tag on hardware that doesn't support, 5787 * doesn't have it enabled, or has broken tag support. 5788 */ 5789 cts->flags &= ~CCB_TRANS_TAG_ENB; 5790 } 5791 } 5792 5793 qfrozen = FALSE; 5794 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 5795 int device_tagenb; 5796 5797 /* 5798 * If we are transitioning from tags to no-tags or 5799 * vice-versa, we need to carefully freeze and restart 5800 * the queue so that we don't overlap tagged and non-tagged 5801 * commands. We also temporarily stop tags if there is 5802 * a change in transfer negotiation settings to allow 5803 * "tag-less" negotiation. 5804 */ 5805 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5806 || (device->inq_flags & SID_CmdQue) != 0) 5807 device_tagenb = TRUE; 5808 else 5809 device_tagenb = FALSE; 5810 5811 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 5812 && device_tagenb == FALSE) 5813 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 5814 && device_tagenb == TRUE)) { 5815 5816 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 5817 /* 5818 * Delay change to use tags until after a 5819 * few commands have gone to this device so 5820 * the controller has time to perform transfer 5821 * negotiations without tagged messages getting 5822 * in the way. 5823 */ 5824 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 5825 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 5826 } else { 5827 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 5828 qfrozen = TRUE; 5829 device->inq_flags &= ~SID_CmdQue; 5830 xpt_dev_ccbq_resize(cts->ccb_h.path, 5831 sim->max_dev_openings); 5832 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5833 device->tag_delay_count = 0; 5834 } 5835 } 5836 } 5837 5838 if (async_update == FALSE) { 5839 /* 5840 * If we are currently performing tagged transactions to 5841 * this device and want to change its negotiation parameters, 5842 * go non-tagged for a bit to give the controller a chance to 5843 * negotiate unhampered by tag messages. 5844 */ 5845 if ((device->inq_flags & SID_CmdQue) != 0 5846 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 5847 CCB_TRANS_SYNC_OFFSET_VALID| 5848 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 5849 xpt_toggle_tags(cts->ccb_h.path); 5850 5851 (*(sim->sim_action))(sim, (union ccb *)cts); 5852 } 5853 5854 if (qfrozen) { 5855 struct ccb_relsim crs; 5856 5857 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 5858 /*priority*/1); 5859 crs.ccb_h.func_code = XPT_REL_SIMQ; 5860 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5861 crs.openings 5862 = crs.release_timeout 5863 = crs.qfrozen_cnt 5864 = 0; 5865 xpt_action((union ccb *)&crs); 5866 } 5867 } 5868 5869 static void 5870 xpt_toggle_tags(struct cam_path *path) 5871 { 5872 struct cam_ed *dev; 5873 5874 /* 5875 * Give controllers a chance to renegotiate 5876 * before starting tag operations. We 5877 * "toggle" tagged queuing off then on 5878 * which causes the tag enable command delay 5879 * counter to come into effect. 5880 */ 5881 dev = path->device; 5882 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5883 || ((dev->inq_flags & SID_CmdQue) != 0 5884 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 5885 struct ccb_trans_settings cts; 5886 5887 xpt_setup_ccb(&cts.ccb_h, path, 1); 5888 cts.flags = 0; 5889 cts.valid = CCB_TRANS_TQ_VALID; 5890 xpt_set_transfer_settings(&cts, path->device, 5891 /*async_update*/TRUE); 5892 cts.flags = CCB_TRANS_TAG_ENB; 5893 xpt_set_transfer_settings(&cts, path->device, 5894 /*async_update*/TRUE); 5895 } 5896 } 5897 5898 static void 5899 xpt_start_tags(struct cam_path *path) 5900 { 5901 struct ccb_relsim crs; 5902 struct cam_ed *device; 5903 struct cam_sim *sim; 5904 int newopenings; 5905 5906 device = path->device; 5907 sim = path->bus->sim; 5908 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5909 xpt_freeze_devq(path, /*count*/1); 5910 device->inq_flags |= SID_CmdQue; 5911 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 5912 xpt_dev_ccbq_resize(path, newopenings); 5913 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 5914 crs.ccb_h.func_code = XPT_REL_SIMQ; 5915 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5916 crs.openings 5917 = crs.release_timeout 5918 = crs.qfrozen_cnt 5919 = 0; 5920 xpt_action((union ccb *)&crs); 5921 } 5922 5923 static int busses_to_config; 5924 static int busses_to_reset; 5925 5926 static int 5927 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 5928 { 5929 if (bus->path_id != CAM_XPT_PATH_ID) { 5930 struct cam_path path; 5931 struct ccb_pathinq cpi; 5932 int can_negotiate; 5933 5934 busses_to_config++; 5935 xpt_compile_path(&path, NULL, bus->path_id, 5936 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5937 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 5938 cpi.ccb_h.func_code = XPT_PATH_INQ; 5939 xpt_action((union ccb *)&cpi); 5940 can_negotiate = cpi.hba_inquiry; 5941 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 5942 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 5943 && can_negotiate) 5944 busses_to_reset++; 5945 xpt_release_path(&path); 5946 } 5947 5948 return(1); 5949 } 5950 5951 static int 5952 xptconfigfunc(struct cam_eb *bus, void *arg) 5953 { 5954 struct cam_path *path; 5955 union ccb *work_ccb; 5956 5957 if (bus->path_id != CAM_XPT_PATH_ID) { 5958 cam_status status; 5959 int can_negotiate; 5960 5961 work_ccb = xpt_alloc_ccb(); 5962 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 5963 CAM_TARGET_WILDCARD, 5964 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 5965 printf("xptconfigfunc: xpt_create_path failed with " 5966 "status %#x for bus %d\n", status, bus->path_id); 5967 printf("xptconfigfunc: halting bus configuration\n"); 5968 xpt_free_ccb(work_ccb); 5969 busses_to_config--; 5970 xpt_finishconfig(xpt_periph, NULL); 5971 return(0); 5972 } 5973 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5974 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5975 xpt_action(work_ccb); 5976 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5977 printf("xptconfigfunc: CPI failed on bus %d " 5978 "with status %d\n", bus->path_id, 5979 work_ccb->ccb_h.status); 5980 xpt_finishconfig(xpt_periph, work_ccb); 5981 return(1); 5982 } 5983 5984 can_negotiate = work_ccb->cpi.hba_inquiry; 5985 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 5986 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 5987 && (can_negotiate != 0)) { 5988 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5989 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5990 work_ccb->ccb_h.cbfcnp = NULL; 5991 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 5992 ("Resetting Bus\n")); 5993 xpt_action(work_ccb); 5994 xpt_finishconfig(xpt_periph, work_ccb); 5995 } else { 5996 /* Act as though we performed a successful BUS RESET */ 5997 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5998 xpt_finishconfig(xpt_periph, work_ccb); 5999 } 6000 } 6001 6002 return(1); 6003 } 6004 6005 static void 6006 xpt_config(void *arg) 6007 { 6008 /* Now that interrupts are enabled, go find our devices */ 6009 6010 #ifdef CAMDEBUG 6011 /* Setup debugging flags and path */ 6012 #ifdef CAM_DEBUG_FLAGS 6013 cam_dflags = CAM_DEBUG_FLAGS; 6014 #else /* !CAM_DEBUG_FLAGS */ 6015 cam_dflags = CAM_DEBUG_NONE; 6016 #endif /* CAM_DEBUG_FLAGS */ 6017 #ifdef CAM_DEBUG_BUS 6018 if (cam_dflags != CAM_DEBUG_NONE) { 6019 if (xpt_create_path(&cam_dpath, xpt_periph, 6020 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6021 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6022 printf("xpt_config: xpt_create_path() failed for debug" 6023 " target %d:%d:%d, debugging disabled\n", 6024 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6025 cam_dflags = CAM_DEBUG_NONE; 6026 } 6027 } else 6028 cam_dpath = NULL; 6029 #else /* !CAM_DEBUG_BUS */ 6030 cam_dpath = NULL; 6031 #endif /* CAM_DEBUG_BUS */ 6032 #endif /* CAMDEBUG */ 6033 6034 /* 6035 * Scan all installed busses. 6036 */ 6037 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6038 6039 if (busses_to_config == 0) { 6040 /* Call manually because we don't have any busses */ 6041 xpt_finishconfig(xpt_periph, NULL); 6042 } else { 6043 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) { 6044 printf("Waiting %d seconds for SCSI " 6045 "devices to settle\n", SCSI_DELAY/1000); 6046 } 6047 xpt_for_all_busses(xptconfigfunc, NULL); 6048 } 6049 } 6050 6051 /* 6052 * If the given device only has one peripheral attached to it, and if that 6053 * peripheral is the passthrough driver, announce it. This insures that the 6054 * user sees some sort of announcement for every peripheral in their system. 6055 */ 6056 static int 6057 xptpassannouncefunc(struct cam_ed *device, void *arg) 6058 { 6059 struct cam_periph *periph; 6060 int i; 6061 6062 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6063 periph = SLIST_NEXT(periph, periph_links), i++); 6064 6065 periph = SLIST_FIRST(&device->periphs); 6066 if ((i == 1) 6067 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6068 xpt_announce_periph(periph, NULL); 6069 6070 return(1); 6071 } 6072 6073 static void 6074 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6075 { 6076 struct periph_driver **p_drv; 6077 6078 if (done_ccb != NULL) { 6079 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6080 ("xpt_finishconfig\n")); 6081 switch(done_ccb->ccb_h.func_code) { 6082 case XPT_RESET_BUS: 6083 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6084 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6085 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6086 xpt_action(done_ccb); 6087 return; 6088 } 6089 /* FALLTHROUGH */ 6090 case XPT_SCAN_BUS: 6091 default: 6092 xpt_free_path(done_ccb->ccb_h.path); 6093 busses_to_config--; 6094 break; 6095 } 6096 } 6097 6098 if (busses_to_config == 0) { 6099 /* Register all the peripheral drivers */ 6100 /* XXX This will have to change when we have loadable modules */ 6101 SET_FOREACH(p_drv, periphdriver_set) { 6102 (*p_drv)->init(); 6103 } 6104 6105 /* 6106 * Check for devices with no "standard" peripheral driver 6107 * attached. For any devices like that, announce the 6108 * passthrough driver so the user will see something. 6109 */ 6110 xpt_for_all_devices(xptpassannouncefunc, NULL); 6111 6112 /* Release our hook so that the boot can continue. */ 6113 config_intrhook_disestablish(xpt_config_hook); 6114 free(xpt_config_hook, M_TEMP); 6115 xpt_config_hook = NULL; 6116 } 6117 if (done_ccb != NULL) 6118 xpt_free_ccb(done_ccb); 6119 } 6120 6121 static void 6122 xptaction(struct cam_sim *sim, union ccb *work_ccb) 6123 { 6124 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6125 6126 switch (work_ccb->ccb_h.func_code) { 6127 /* Common cases first */ 6128 case XPT_PATH_INQ: /* Path routing inquiry */ 6129 { 6130 struct ccb_pathinq *cpi; 6131 6132 cpi = &work_ccb->cpi; 6133 cpi->version_num = 1; /* XXX??? */ 6134 cpi->hba_inquiry = 0; 6135 cpi->target_sprt = 0; 6136 cpi->hba_misc = 0; 6137 cpi->hba_eng_cnt = 0; 6138 cpi->max_target = 0; 6139 cpi->max_lun = 0; 6140 cpi->initiator_id = 0; 6141 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6142 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6143 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6144 cpi->unit_number = sim->unit_number; 6145 cpi->bus_id = sim->bus_id; 6146 cpi->base_transfer_speed = 0; 6147 cpi->ccb_h.status = CAM_REQ_CMP; 6148 xpt_done(work_ccb); 6149 break; 6150 } 6151 default: 6152 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6153 xpt_done(work_ccb); 6154 break; 6155 } 6156 } 6157 6158 /* 6159 * The xpt as a "controller" has no interrupt sources, so polling 6160 * is a no-op. 6161 */ 6162 static void 6163 xptpoll(struct cam_sim *sim) 6164 { 6165 } 6166 6167 /* 6168 * Should only be called by the machine interrupt dispatch routines, 6169 * so put these prototypes here instead of in the header. 6170 */ 6171 6172 static void 6173 swi_camnet(void *arg) 6174 { 6175 camisr(&cam_netq); 6176 } 6177 6178 static void 6179 swi_cambio(void *arg) 6180 { 6181 camisr(&cam_bioq); 6182 } 6183 6184 static void 6185 camisr(cam_isrq_t *queue) 6186 { 6187 struct ccb_hdr *ccb_h; 6188 6189 crit_enter(); 6190 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6191 int runq; 6192 6193 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6194 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6195 splz(); 6196 6197 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6198 ("camisr\n")); 6199 6200 runq = FALSE; 6201 6202 if (ccb_h->flags & CAM_HIGH_POWER) { 6203 struct highpowerlist *hphead; 6204 struct cam_ed *device; 6205 union ccb *send_ccb; 6206 6207 hphead = &highpowerq; 6208 6209 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6210 6211 /* 6212 * Increment the count since this command is done. 6213 */ 6214 num_highpower++; 6215 6216 /* 6217 * Any high powered commands queued up? 6218 */ 6219 if (send_ccb != NULL) { 6220 device = send_ccb->ccb_h.path->device; 6221 6222 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6223 6224 xpt_release_devq(send_ccb->ccb_h.path, 6225 /*count*/1, /*runqueue*/TRUE); 6226 } 6227 } 6228 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6229 struct cam_ed *dev; 6230 6231 dev = ccb_h->path->device; 6232 6233 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6234 6235 if (ccb_h->path->bus->sim->devq) { 6236 ccb_h->path->bus->sim->devq->send_active--; 6237 ccb_h->path->bus->sim->devq->send_openings++; 6238 } 6239 6240 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6241 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6242 && (dev->ccbq.dev_active == 0))) { 6243 6244 xpt_release_devq(ccb_h->path, /*count*/1, 6245 /*run_queue*/TRUE); 6246 } 6247 6248 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6249 && (--dev->tag_delay_count == 0)) 6250 xpt_start_tags(ccb_h->path); 6251 6252 if ((dev->ccbq.queue.entries > 0) 6253 && (dev->qfrozen_cnt == 0) 6254 && (device_is_send_queued(dev) == 0)) { 6255 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6256 dev); 6257 } 6258 } 6259 6260 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6261 xpt_release_simq(ccb_h->path->bus->sim, 6262 /*run_queue*/TRUE); 6263 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6264 runq = FALSE; 6265 } 6266 6267 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6268 && (ccb_h->status & CAM_DEV_QFRZN)) { 6269 xpt_release_devq(ccb_h->path, /*count*/1, 6270 /*run_queue*/TRUE); 6271 ccb_h->status &= ~CAM_DEV_QFRZN; 6272 } else if (runq) { 6273 xpt_run_dev_sendq(ccb_h->path->bus); 6274 } 6275 6276 /* Call the peripheral driver's callback */ 6277 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6278 } 6279 crit_exit(); 6280 } 6281