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 */ 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/types.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/time.h> 37 #include <sys/conf.h> 38 #include <sys/device.h> 39 #include <sys/fcntl.h> 40 #include <sys/md5.h> 41 #include <sys/devicestat.h> 42 #include <sys/interrupt.h> 43 #include <sys/sbuf.h> 44 #include <sys/taskqueue.h> 45 #include <sys/bus.h> 46 #include <sys/thread.h> 47 #include <sys/lock.h> 48 #include <sys/spinlock.h> 49 50 #include <sys/thread2.h> 51 #include <sys/spinlock2.h> 52 #include <sys/mplock2.h> 53 54 #include <machine/clock.h> 55 #include <machine/stdarg.h> 56 57 #include "cam.h" 58 #include "cam_ccb.h" 59 #include "cam_periph.h" 60 #include "cam_sim.h" 61 #include "cam_xpt.h" 62 #include "cam_xpt_sim.h" 63 #include "cam_xpt_periph.h" 64 #include "cam_debug.h" 65 66 #include "scsi/scsi_all.h" 67 #include "scsi/scsi_message.h" 68 #include "scsi/scsi_pass.h" 69 #include <sys/kthread.h> 70 #include "opt_cam.h" 71 72 /* Datastructures internal to the xpt layer */ 73 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 74 75 /* Object for defering XPT actions to a taskqueue */ 76 struct xpt_task { 77 struct task task; 78 void *data1; 79 uintptr_t data2; 80 }; 81 82 /* 83 * Definition of an async handler callback block. These are used to add 84 * SIMs and peripherals to the async callback lists. 85 */ 86 struct async_node { 87 SLIST_ENTRY(async_node) links; 88 u_int32_t event_enable; /* Async Event enables */ 89 void (*callback)(void *arg, u_int32_t code, 90 struct cam_path *path, void *args); 91 void *callback_arg; 92 }; 93 94 SLIST_HEAD(async_list, async_node); 95 SLIST_HEAD(periph_list, cam_periph); 96 97 /* 98 * This is the maximum number of high powered commands (e.g. start unit) 99 * that can be outstanding at a particular time. 100 */ 101 #ifndef CAM_MAX_HIGHPOWER 102 #define CAM_MAX_HIGHPOWER 4 103 #endif 104 105 /* 106 * Structure for queueing a device in a run queue. 107 * There is one run queue for allocating new ccbs, 108 * and another for sending ccbs to the controller. 109 */ 110 struct cam_ed_qinfo { 111 cam_pinfo pinfo; 112 struct cam_ed *device; 113 }; 114 115 /* 116 * The CAM EDT (Existing Device Table) contains the device information for 117 * all devices for all busses in the system. The table contains a 118 * cam_ed structure for each device on the bus. 119 */ 120 struct cam_ed { 121 TAILQ_ENTRY(cam_ed) links; 122 struct cam_ed_qinfo alloc_ccb_entry; 123 struct cam_ed_qinfo send_ccb_entry; 124 struct cam_et *target; 125 struct cam_sim *sim; 126 lun_id_t lun_id; 127 struct camq drvq; /* 128 * Queue of type drivers wanting to do 129 * work on this device. 130 */ 131 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 132 struct async_list asyncs; /* Async callback info for this B/T/L */ 133 struct periph_list periphs; /* All attached devices */ 134 u_int generation; /* Generation number */ 135 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 136 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 137 /* Storage for the inquiry data */ 138 cam_proto protocol; 139 u_int protocol_version; 140 cam_xport transport; 141 u_int transport_version; 142 struct scsi_inquiry_data inq_data; 143 u_int8_t inq_flags; /* 144 * Current settings for inquiry flags. 145 * This allows us to override settings 146 * like disconnection and tagged 147 * queuing for a device. 148 */ 149 u_int8_t queue_flags; /* Queue flags from the control page */ 150 u_int8_t serial_num_len; 151 u_int8_t *serial_num; 152 u_int32_t qfrozen_cnt; 153 u_int32_t flags; 154 #define CAM_DEV_UNCONFIGURED 0x01 155 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 156 #define CAM_DEV_REL_ON_COMPLETE 0x04 157 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 158 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 159 #define CAM_DEV_TAG_AFTER_COUNT 0x20 160 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 161 #define CAM_DEV_IN_DV 0x80 162 #define CAM_DEV_DV_HIT_BOTTOM 0x100 163 u_int32_t tag_delay_count; 164 #define CAM_TAG_DELAY_COUNT 5 165 u_int32_t tag_saved_openings; 166 u_int32_t refcount; 167 struct callout callout; 168 }; 169 170 /* 171 * Each target is represented by an ET (Existing Target). These 172 * entries are created when a target is successfully probed with an 173 * identify, and removed when a device fails to respond after a number 174 * of retries, or a bus rescan finds the device missing. 175 */ 176 struct cam_et { 177 TAILQ_HEAD(, cam_ed) ed_entries; 178 TAILQ_ENTRY(cam_et) links; 179 struct cam_eb *bus; 180 target_id_t target_id; 181 u_int32_t refcount; 182 u_int generation; 183 struct timeval last_reset; /* uptime of last reset */ 184 }; 185 186 /* 187 * Each bus is represented by an EB (Existing Bus). These entries 188 * are created by calls to xpt_bus_register and deleted by calls to 189 * xpt_bus_deregister. 190 */ 191 struct cam_eb { 192 TAILQ_HEAD(, cam_et) et_entries; 193 TAILQ_ENTRY(cam_eb) links; 194 path_id_t path_id; 195 struct cam_sim *sim; 196 struct timeval last_reset; /* uptime of last reset */ 197 u_int32_t flags; 198 #define CAM_EB_RUNQ_SCHEDULED 0x01 199 u_int32_t refcount; 200 u_int generation; 201 int counted_to_config; /* busses_to_config */ 202 }; 203 204 struct cam_path { 205 struct cam_periph *periph; 206 struct cam_eb *bus; 207 struct cam_et *target; 208 struct cam_ed *device; 209 }; 210 211 struct xpt_quirk_entry { 212 struct scsi_inquiry_pattern inq_pat; 213 u_int8_t quirks; 214 #define CAM_QUIRK_NOLUNS 0x01 215 #define CAM_QUIRK_NOSERIAL 0x02 216 #define CAM_QUIRK_HILUNS 0x04 217 #define CAM_QUIRK_NOHILUNS 0x08 218 u_int mintags; 219 u_int maxtags; 220 }; 221 222 static int cam_srch_hi = 0; 223 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi); 224 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS); 225 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0, 226 sysctl_cam_search_luns, "I", 227 "allow search above LUN 7 for SCSI3 and greater devices"); 228 229 #define CAM_SCSI2_MAXLUN 8 230 /* 231 * If we're not quirked to search <= the first 8 luns 232 * and we are either quirked to search above lun 8, 233 * or we're > SCSI-2 and we've enabled hilun searching, 234 * or we're > SCSI-2 and the last lun was a success, 235 * we can look for luns above lun 8. 236 */ 237 #define CAN_SRCH_HI_SPARSE(dv) \ 238 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 239 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 240 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi))) 241 242 #define CAN_SRCH_HI_DENSE(dv) \ 243 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 244 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 245 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))) 246 247 typedef enum { 248 XPT_FLAG_OPEN = 0x01 249 } xpt_flags; 250 251 struct xpt_softc { 252 xpt_flags flags; 253 u_int32_t xpt_generation; 254 255 /* number of high powered commands that can go through right now */ 256 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 257 int num_highpower; 258 259 /* queue for handling async rescan requests. */ 260 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 261 int ccb_scanq_running; 262 263 /* Registered busses */ 264 TAILQ_HEAD(,cam_eb) xpt_busses; 265 u_int bus_generation; 266 267 struct intr_config_hook *xpt_config_hook; 268 269 struct lock xpt_topo_lock; 270 struct lock xpt_lock; 271 }; 272 273 static const char quantum[] = "QUANTUM"; 274 static const char sony[] = "SONY"; 275 static const char west_digital[] = "WDIGTL"; 276 static const char samsung[] = "SAMSUNG"; 277 static const char seagate[] = "SEAGATE"; 278 static const char microp[] = "MICROP"; 279 280 static struct xpt_quirk_entry xpt_quirk_table[] = 281 { 282 { 283 /* Reports QUEUE FULL for temporary resource shortages */ 284 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 285 /*quirks*/0, /*mintags*/24, /*maxtags*/32 286 }, 287 { 288 /* Reports QUEUE FULL for temporary resource shortages */ 289 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 290 /*quirks*/0, /*mintags*/24, /*maxtags*/32 291 }, 292 { 293 /* Reports QUEUE FULL for temporary resource shortages */ 294 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 295 /*quirks*/0, /*mintags*/24, /*maxtags*/32 296 }, 297 { 298 /* Broken tagged queuing drive */ 299 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 300 /*quirks*/0, /*mintags*/0, /*maxtags*/0 301 }, 302 { 303 /* Broken tagged queuing drive */ 304 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 305 /*quirks*/0, /*mintags*/0, /*maxtags*/0 306 }, 307 { 308 /* Broken tagged queuing drive */ 309 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 310 /*quirks*/0, /*mintags*/0, /*maxtags*/0 311 }, 312 { 313 /* 314 * Unfortunately, the Quantum Atlas III has the same 315 * problem as the Atlas II drives above. 316 * Reported by: "Johan Granlund" <johan@granlund.nu> 317 * 318 * For future reference, the drive with the problem was: 319 * QUANTUM QM39100TD-SW N1B0 320 * 321 * It's possible that Quantum will fix the problem in later 322 * firmware revisions. If that happens, the quirk entry 323 * will need to be made specific to the firmware revisions 324 * with the problem. 325 * 326 */ 327 /* Reports QUEUE FULL for temporary resource shortages */ 328 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 329 /*quirks*/0, /*mintags*/24, /*maxtags*/32 330 }, 331 { 332 /* 333 * 18 Gig Atlas III, same problem as the 9G version. 334 * Reported by: Andre Albsmeier 335 * <andre.albsmeier@mchp.siemens.de> 336 * 337 * For future reference, the drive with the problem was: 338 * QUANTUM QM318000TD-S N491 339 */ 340 /* Reports QUEUE FULL for temporary resource shortages */ 341 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 342 /*quirks*/0, /*mintags*/24, /*maxtags*/32 343 }, 344 { 345 /* 346 * Broken tagged queuing drive 347 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 348 * and: Martin Renters <martin@tdc.on.ca> 349 */ 350 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 351 /*quirks*/0, /*mintags*/0, /*maxtags*/0 352 }, 353 /* 354 * The Seagate Medalist Pro drives have very poor write 355 * performance with anything more than 2 tags. 356 * 357 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 358 * Drive: <SEAGATE ST36530N 1444> 359 * 360 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 361 * Drive: <SEAGATE ST34520W 1281> 362 * 363 * No one has actually reported that the 9G version 364 * (ST39140*) of the Medalist Pro has the same problem, but 365 * we're assuming that it does because the 4G and 6.5G 366 * versions of the drive are broken. 367 */ 368 { 369 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 370 /*quirks*/0, /*mintags*/2, /*maxtags*/2 371 }, 372 { 373 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 374 /*quirks*/0, /*mintags*/2, /*maxtags*/2 375 }, 376 { 377 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 378 /*quirks*/0, /*mintags*/2, /*maxtags*/2 379 }, 380 { 381 /* 382 * Slow when tagged queueing is enabled. Write performance 383 * steadily drops off with more and more concurrent 384 * transactions. Best sequential write performance with 385 * tagged queueing turned off and write caching turned on. 386 * 387 * PR: kern/10398 388 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 389 * Drive: DCAS-34330 w/ "S65A" firmware. 390 * 391 * The drive with the problem had the "S65A" firmware 392 * revision, and has also been reported (by Stephen J. 393 * Roznowski <sjr@home.net>) for a drive with the "S61A" 394 * firmware revision. 395 * 396 * Although no one has reported problems with the 2 gig 397 * version of the DCAS drive, the assumption is that it 398 * has the same problems as the 4 gig version. Therefore 399 * this quirk entries disables tagged queueing for all 400 * DCAS drives. 401 */ 402 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 403 /*quirks*/0, /*mintags*/0, /*maxtags*/0 404 }, 405 { 406 /* Broken tagged queuing drive */ 407 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 408 /*quirks*/0, /*mintags*/0, /*maxtags*/0 409 }, 410 { 411 /* Broken tagged queuing drive */ 412 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 413 /*quirks*/0, /*mintags*/0, /*maxtags*/0 414 }, 415 { 416 /* This does not support other than LUN 0 */ 417 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" }, 418 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 419 }, 420 { 421 /* 422 * Broken tagged queuing drive. 423 * Submitted by: 424 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 425 * in PR kern/9535 426 */ 427 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 428 /*quirks*/0, /*mintags*/0, /*maxtags*/0 429 }, 430 { 431 /* 432 * Slow when tagged queueing is enabled. (1.5MB/sec versus 433 * 8MB/sec.) 434 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 435 * Best performance with these drives is achieved with 436 * tagged queueing turned off, and write caching turned on. 437 */ 438 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 439 /*quirks*/0, /*mintags*/0, /*maxtags*/0 440 }, 441 { 442 /* 443 * Slow when tagged queueing is enabled. (1.5MB/sec versus 444 * 8MB/sec.) 445 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 446 * Best performance with these drives is achieved with 447 * tagged queueing turned off, and write caching turned on. 448 */ 449 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 450 /*quirks*/0, /*mintags*/0, /*maxtags*/0 451 }, 452 { 453 /* 454 * Doesn't handle queue full condition correctly, 455 * so we need to limit maxtags to what the device 456 * can handle instead of determining this automatically. 457 */ 458 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 459 /*quirks*/0, /*mintags*/2, /*maxtags*/32 460 }, 461 { 462 /* Really only one LUN */ 463 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 464 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 465 }, 466 { 467 /* I can't believe we need a quirk for DPT volumes. */ 468 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 469 CAM_QUIRK_NOLUNS, 470 /*mintags*/0, /*maxtags*/255 471 }, 472 { 473 /* 474 * Many Sony CDROM drives don't like multi-LUN probing. 475 */ 476 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 477 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 478 }, 479 { 480 /* 481 * This drive doesn't like multiple LUN probing. 482 * Submitted by: Parag Patel <parag@cgt.com> 483 */ 484 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 485 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 486 }, 487 { 488 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 489 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 490 }, 491 { 492 /* 493 * The 8200 doesn't like multi-lun probing, and probably 494 * don't like serial number requests either. 495 */ 496 { 497 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 498 "EXB-8200*", "*" 499 }, 500 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 501 }, 502 { 503 /* 504 * Let's try the same as above, but for a drive that says 505 * it's an IPL-6860 but is actually an EXB 8200. 506 */ 507 { 508 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 509 "IPL-6860*", "*" 510 }, 511 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 512 }, 513 { 514 /* 515 * These Hitachi drives don't like multi-lun probing. 516 * The PR submitter has a DK319H, but says that the Linux 517 * kernel has a similar work-around for the DK312 and DK314, 518 * so all DK31* drives are quirked here. 519 * PR: misc/18793 520 * Submitted by: Paul Haddad <paul@pth.com> 521 */ 522 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 523 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 524 }, 525 { 526 /* 527 * The Hitachi CJ series with J8A8 firmware apparantly has 528 * problems with tagged commands. 529 * PR: 23536 530 * Reported by: amagai@nue.org 531 */ 532 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" }, 533 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 534 }, 535 { 536 /* 537 * These are the large storage arrays. 538 * Submitted by: William Carrel <william.carrel@infospace.com> 539 */ 540 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" }, 541 CAM_QUIRK_HILUNS, 2, 1024 542 }, 543 { 544 /* 545 * This old revision of the TDC3600 is also SCSI-1, and 546 * hangs upon serial number probing. 547 */ 548 { 549 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 550 " TDC 3600", "U07:" 551 }, 552 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 553 }, 554 { 555 /* 556 * Would repond to all LUNs if asked for. 557 */ 558 { 559 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 560 "CP150", "*" 561 }, 562 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 563 }, 564 { 565 /* 566 * Would repond to all LUNs if asked for. 567 */ 568 { 569 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 570 "96X2*", "*" 571 }, 572 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 573 }, 574 { 575 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 576 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 577 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 578 }, 579 { 580 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 581 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 582 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 583 }, 584 { 585 /* TeraSolutions special settings for TRC-22 RAID */ 586 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 587 /*quirks*/0, /*mintags*/55, /*maxtags*/255 588 }, 589 { 590 /* Veritas Storage Appliance */ 591 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 592 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 593 }, 594 { 595 /* 596 * Would respond to all LUNs. Device type and removable 597 * flag are jumper-selectable. 598 */ 599 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 600 "Tahiti 1", "*" 601 }, 602 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 603 }, 604 { 605 /* EasyRAID E5A aka. areca ARC-6010 */ 606 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" }, 607 CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255 608 }, 609 { 610 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" }, 611 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 612 }, 613 { 614 /* Default tagged queuing parameters for all devices */ 615 { 616 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 617 /*vendor*/"*", /*product*/"*", /*revision*/"*" 618 }, 619 /*quirks*/0, /*mintags*/2, /*maxtags*/255 620 }, 621 }; 622 623 static const int xpt_quirk_table_size = NELEM(xpt_quirk_table); 624 625 typedef enum { 626 DM_RET_COPY = 0x01, 627 DM_RET_FLAG_MASK = 0x0f, 628 DM_RET_NONE = 0x00, 629 DM_RET_STOP = 0x10, 630 DM_RET_DESCEND = 0x20, 631 DM_RET_ERROR = 0x30, 632 DM_RET_ACTION_MASK = 0xf0 633 } dev_match_ret; 634 635 typedef enum { 636 XPT_DEPTH_BUS, 637 XPT_DEPTH_TARGET, 638 XPT_DEPTH_DEVICE, 639 XPT_DEPTH_PERIPH 640 } xpt_traverse_depth; 641 642 struct xpt_traverse_config { 643 xpt_traverse_depth depth; 644 void *tr_func; 645 void *tr_arg; 646 }; 647 648 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 649 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 650 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 651 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 652 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 653 654 /* Transport layer configuration information */ 655 static struct xpt_softc xsoftc; 656 657 /* Queues for our software interrupt handler */ 658 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 659 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 660 static cam_simq_t cam_simq; 661 static struct spinlock cam_simq_spin; 662 663 struct cam_periph *xpt_periph; 664 665 static periph_init_t xpt_periph_init; 666 667 static periph_init_t probe_periph_init; 668 669 static struct periph_driver xpt_driver = 670 { 671 xpt_periph_init, "xpt", 672 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 673 }; 674 675 static struct periph_driver probe_driver = 676 { 677 probe_periph_init, "probe", 678 TAILQ_HEAD_INITIALIZER(probe_driver.units) 679 }; 680 681 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 682 PERIPHDRIVER_DECLARE(probe, probe_driver); 683 684 static d_open_t xptopen; 685 static d_close_t xptclose; 686 static d_ioctl_t xptioctl; 687 688 static struct dev_ops xpt_ops = { 689 { "xpt", 0, 0 }, 690 .d_open = xptopen, 691 .d_close = xptclose, 692 .d_ioctl = xptioctl 693 }; 694 695 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb); 696 static void dead_sim_poll(struct cam_sim *sim); 697 698 /* Dummy SIM that is used when the real one has gone. */ 699 static struct cam_sim cam_dead_sim; 700 static struct lock cam_dead_lock; 701 702 /* Storage for debugging datastructures */ 703 #ifdef CAMDEBUG 704 struct cam_path *cam_dpath; 705 u_int32_t cam_dflags; 706 u_int32_t cam_debug_delay; 707 #endif 708 709 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 710 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 711 #endif 712 713 /* 714 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 715 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 716 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 717 */ 718 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 719 || defined(CAM_DEBUG_LUN) 720 #ifdef CAMDEBUG 721 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 722 || !defined(CAM_DEBUG_LUN) 723 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 724 and CAM_DEBUG_LUN" 725 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 726 #else /* !CAMDEBUG */ 727 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 728 #endif /* CAMDEBUG */ 729 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 730 731 /* Our boot-time initialization hook */ 732 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 733 734 static moduledata_t cam_moduledata = { 735 "cam", 736 cam_module_event_handler, 737 NULL 738 }; 739 740 static int xpt_init(void *); 741 742 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 743 MODULE_VERSION(cam, 1); 744 745 746 static cam_status xpt_compile_path(struct cam_path *new_path, 747 struct cam_periph *perph, 748 path_id_t path_id, 749 target_id_t target_id, 750 lun_id_t lun_id); 751 752 static void xpt_release_path(struct cam_path *path); 753 754 static void xpt_async_bcast(struct async_list *async_head, 755 u_int32_t async_code, 756 struct cam_path *path, 757 void *async_arg); 758 static void xpt_dev_async(u_int32_t async_code, 759 struct cam_eb *bus, 760 struct cam_et *target, 761 struct cam_ed *device, 762 void *async_arg); 763 static path_id_t xptnextfreepathid(void); 764 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 765 static union ccb *xpt_get_ccb(struct cam_ed *device); 766 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 767 u_int32_t new_priority); 768 static void xpt_run_dev_allocq(struct cam_eb *bus); 769 static void xpt_run_dev_sendq(struct cam_eb *bus); 770 static timeout_t xpt_release_devq_timeout; 771 static void xpt_release_bus(struct cam_eb *bus); 772 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 773 int run_queue); 774 static struct cam_et* 775 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 776 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 777 static struct cam_ed* 778 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 779 lun_id_t lun_id); 780 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 781 struct cam_ed *device); 782 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 783 static struct cam_eb* 784 xpt_find_bus(path_id_t path_id); 785 static struct cam_et* 786 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 787 static struct cam_ed* 788 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 789 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 790 static void xpt_scan_lun(struct cam_periph *periph, 791 struct cam_path *path, cam_flags flags, 792 union ccb *ccb); 793 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 794 static xpt_busfunc_t xptconfigbuscountfunc; 795 static xpt_busfunc_t xptconfigfunc; 796 static void xpt_config(void *arg); 797 static xpt_devicefunc_t xptpassannouncefunc; 798 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 799 static void xpt_uncount_bus (struct cam_eb *bus); 800 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 801 static void xptpoll(struct cam_sim *sim); 802 static inthand2_t swi_cambio; 803 static void camisr(void *); 804 static void camisr_runqueue(struct cam_sim *); 805 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 806 u_int num_patterns, struct cam_eb *bus); 807 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 808 u_int num_patterns, 809 struct cam_ed *device); 810 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 811 u_int num_patterns, 812 struct cam_periph *periph); 813 static xpt_busfunc_t xptedtbusfunc; 814 static xpt_targetfunc_t xptedttargetfunc; 815 static xpt_devicefunc_t xptedtdevicefunc; 816 static xpt_periphfunc_t xptedtperiphfunc; 817 static xpt_pdrvfunc_t xptplistpdrvfunc; 818 static xpt_periphfunc_t xptplistperiphfunc; 819 static int xptedtmatch(struct ccb_dev_match *cdm); 820 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 821 static int xptbustraverse(struct cam_eb *start_bus, 822 xpt_busfunc_t *tr_func, void *arg); 823 static int xpttargettraverse(struct cam_eb *bus, 824 struct cam_et *start_target, 825 xpt_targetfunc_t *tr_func, void *arg); 826 static int xptdevicetraverse(struct cam_et *target, 827 struct cam_ed *start_device, 828 xpt_devicefunc_t *tr_func, void *arg); 829 static int xptperiphtraverse(struct cam_ed *device, 830 struct cam_periph *start_periph, 831 xpt_periphfunc_t *tr_func, void *arg); 832 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 833 xpt_pdrvfunc_t *tr_func, void *arg); 834 static int xptpdperiphtraverse(struct periph_driver **pdrv, 835 struct cam_periph *start_periph, 836 xpt_periphfunc_t *tr_func, 837 void *arg); 838 static xpt_busfunc_t xptdefbusfunc; 839 static xpt_targetfunc_t xptdeftargetfunc; 840 static xpt_devicefunc_t xptdefdevicefunc; 841 static xpt_periphfunc_t xptdefperiphfunc; 842 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 843 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 844 void *arg); 845 static xpt_devicefunc_t xptsetasyncfunc; 846 static xpt_busfunc_t xptsetasyncbusfunc; 847 static cam_status xptregister(struct cam_periph *periph, 848 void *arg); 849 static cam_status proberegister(struct cam_periph *periph, 850 void *arg); 851 static void probeschedule(struct cam_periph *probe_periph); 852 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 853 static void proberequestdefaultnegotiation(struct cam_periph *periph); 854 static int proberequestbackoff(struct cam_periph *periph, 855 struct cam_ed *device); 856 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 857 static void probecleanup(struct cam_periph *periph); 858 static void xpt_find_quirk(struct cam_ed *device); 859 static void xpt_devise_transport(struct cam_path *path); 860 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 861 struct cam_ed *device, 862 int async_update); 863 static void xpt_toggle_tags(struct cam_path *path); 864 static void xpt_start_tags(struct cam_path *path); 865 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 866 struct cam_ed *dev); 867 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 868 struct cam_ed *dev); 869 static __inline int periph_is_queued(struct cam_periph *periph); 870 static __inline int device_is_alloc_queued(struct cam_ed *device); 871 static __inline int device_is_send_queued(struct cam_ed *device); 872 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 873 874 static __inline int 875 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 876 { 877 int retval; 878 879 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 880 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 881 cam_ccbq_resize(&dev->ccbq, 882 dev->ccbq.dev_openings 883 + dev->ccbq.dev_active); 884 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 885 } 886 /* 887 * The priority of a device waiting for CCB resources 888 * is that of the the highest priority peripheral driver 889 * enqueued. 890 */ 891 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 892 &dev->alloc_ccb_entry.pinfo, 893 CAMQ_GET_HEAD(&dev->drvq)->priority); 894 } else { 895 retval = 0; 896 } 897 898 return (retval); 899 } 900 901 static __inline int 902 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 903 { 904 int retval; 905 906 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 907 /* 908 * The priority of a device waiting for controller 909 * resources is that of the the highest priority CCB 910 * enqueued. 911 */ 912 retval = 913 xpt_schedule_dev(&bus->sim->devq->send_queue, 914 &dev->send_ccb_entry.pinfo, 915 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 916 } else { 917 retval = 0; 918 } 919 return (retval); 920 } 921 922 static __inline int 923 periph_is_queued(struct cam_periph *periph) 924 { 925 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 926 } 927 928 static __inline int 929 device_is_alloc_queued(struct cam_ed *device) 930 { 931 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 932 } 933 934 static __inline int 935 device_is_send_queued(struct cam_ed *device) 936 { 937 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 938 } 939 940 static __inline int 941 dev_allocq_is_runnable(struct cam_devq *devq) 942 { 943 /* 944 * Have work to do. 945 * Have space to do more work. 946 * Allowed to do work. 947 */ 948 return ((devq->alloc_queue.qfrozen_cnt == 0) 949 && (devq->alloc_queue.entries > 0) 950 && (devq->alloc_openings > 0)); 951 } 952 953 static void 954 xpt_periph_init(void) 955 { 956 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 957 } 958 959 static void 960 probe_periph_init(void) 961 { 962 } 963 964 965 static void 966 xptdone(struct cam_periph *periph, union ccb *done_ccb) 967 { 968 /* Caller will release the CCB */ 969 wakeup(&done_ccb->ccb_h.cbfcnp); 970 } 971 972 static int 973 xptopen(struct dev_open_args *ap) 974 { 975 cdev_t dev = ap->a_head.a_dev; 976 977 /* 978 * Only allow read-write access. 979 */ 980 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) 981 return(EPERM); 982 983 /* 984 * We don't allow nonblocking access. 985 */ 986 if ((ap->a_oflags & O_NONBLOCK) != 0) { 987 kprintf("%s: can't do nonblocking access\n", devtoname(dev)); 988 return(ENODEV); 989 } 990 991 /* Mark ourselves open */ 992 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 993 xsoftc.flags |= XPT_FLAG_OPEN; 994 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 995 996 return(0); 997 } 998 999 static int 1000 xptclose(struct dev_close_args *ap) 1001 { 1002 1003 /* Mark ourselves closed */ 1004 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 1005 xsoftc.flags &= ~XPT_FLAG_OPEN; 1006 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1007 1008 return(0); 1009 } 1010 1011 /* 1012 * Don't automatically grab the xpt softc lock here even though this is going 1013 * through the xpt device. The xpt device is really just a back door for 1014 * accessing other devices and SIMs, so the right thing to do is to grab 1015 * the appropriate SIM lock once the bus/SIM is located. 1016 */ 1017 static int 1018 xptioctl(struct dev_ioctl_args *ap) 1019 { 1020 int error; 1021 1022 error = 0; 1023 1024 switch(ap->a_cmd) { 1025 /* 1026 * For the transport layer CAMIOCOMMAND ioctl, we really only want 1027 * to accept CCB types that don't quite make sense to send through a 1028 * passthrough driver. 1029 */ 1030 case CAMIOCOMMAND: { 1031 union ccb *ccb; 1032 union ccb *inccb; 1033 struct cam_eb *bus; 1034 1035 inccb = (union ccb *)ap->a_data; 1036 1037 bus = xpt_find_bus(inccb->ccb_h.path_id); 1038 if (bus == NULL) { 1039 error = EINVAL; 1040 break; 1041 } 1042 1043 switch(inccb->ccb_h.func_code) { 1044 case XPT_SCAN_BUS: 1045 case XPT_RESET_BUS: 1046 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 1047 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 1048 error = EINVAL; 1049 break; 1050 } 1051 /* FALLTHROUGH */ 1052 case XPT_PATH_INQ: 1053 case XPT_ENG_INQ: 1054 case XPT_SCAN_LUN: 1055 1056 ccb = xpt_alloc_ccb(); 1057 1058 CAM_SIM_LOCK(bus->sim); 1059 1060 /* 1061 * Create a path using the bus, target, and lun the 1062 * user passed in. 1063 */ 1064 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1065 inccb->ccb_h.path_id, 1066 inccb->ccb_h.target_id, 1067 inccb->ccb_h.target_lun) != 1068 CAM_REQ_CMP){ 1069 error = EINVAL; 1070 CAM_SIM_UNLOCK(bus->sim); 1071 xpt_free_ccb(ccb); 1072 break; 1073 } 1074 /* Ensure all of our fields are correct */ 1075 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1076 inccb->ccb_h.pinfo.priority); 1077 xpt_merge_ccb(ccb, inccb); 1078 ccb->ccb_h.cbfcnp = xptdone; 1079 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1080 bcopy(ccb, inccb, sizeof(union ccb)); 1081 xpt_free_path(ccb->ccb_h.path); 1082 xpt_free_ccb(ccb); 1083 CAM_SIM_UNLOCK(bus->sim); 1084 break; 1085 1086 case XPT_DEBUG: { 1087 union ccb ccb; 1088 1089 /* 1090 * This is an immediate CCB, so it's okay to 1091 * allocate it on the stack. 1092 */ 1093 1094 CAM_SIM_LOCK(bus->sim); 1095 1096 /* 1097 * Create a path using the bus, target, and lun the 1098 * user passed in. 1099 */ 1100 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1101 inccb->ccb_h.path_id, 1102 inccb->ccb_h.target_id, 1103 inccb->ccb_h.target_lun) != 1104 CAM_REQ_CMP){ 1105 error = EINVAL; 1106 CAM_SIM_UNLOCK(bus->sim); 1107 break; 1108 } 1109 /* Ensure all of our fields are correct */ 1110 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1111 inccb->ccb_h.pinfo.priority); 1112 xpt_merge_ccb(&ccb, inccb); 1113 ccb.ccb_h.cbfcnp = xptdone; 1114 xpt_action(&ccb); 1115 CAM_SIM_UNLOCK(bus->sim); 1116 bcopy(&ccb, inccb, sizeof(union ccb)); 1117 xpt_free_path(ccb.ccb_h.path); 1118 break; 1119 1120 } 1121 case XPT_DEV_MATCH: { 1122 struct cam_periph_map_info mapinfo; 1123 struct cam_path *old_path; 1124 1125 /* 1126 * We can't deal with physical addresses for this 1127 * type of transaction. 1128 */ 1129 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1130 error = EINVAL; 1131 break; 1132 } 1133 1134 /* 1135 * Save this in case the caller had it set to 1136 * something in particular. 1137 */ 1138 old_path = inccb->ccb_h.path; 1139 1140 /* 1141 * We really don't need a path for the matching 1142 * code. The path is needed because of the 1143 * debugging statements in xpt_action(). They 1144 * assume that the CCB has a valid path. 1145 */ 1146 inccb->ccb_h.path = xpt_periph->path; 1147 1148 bzero(&mapinfo, sizeof(mapinfo)); 1149 1150 /* 1151 * Map the pattern and match buffers into kernel 1152 * virtual address space. 1153 */ 1154 error = cam_periph_mapmem(inccb, &mapinfo); 1155 1156 if (error) { 1157 inccb->ccb_h.path = old_path; 1158 break; 1159 } 1160 1161 /* 1162 * This is an immediate CCB, we can send it on directly. 1163 */ 1164 xpt_action(inccb); 1165 1166 /* 1167 * Map the buffers back into user space. 1168 */ 1169 cam_periph_unmapmem(inccb, &mapinfo); 1170 1171 inccb->ccb_h.path = old_path; 1172 1173 error = 0; 1174 break; 1175 } 1176 default: 1177 error = ENOTSUP; 1178 break; 1179 } 1180 xpt_release_bus(bus); 1181 break; 1182 } 1183 /* 1184 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1185 * with the periphal driver name and unit name filled in. The other 1186 * fields don't really matter as input. The passthrough driver name 1187 * ("pass"), and unit number are passed back in the ccb. The current 1188 * device generation number, and the index into the device peripheral 1189 * driver list, and the status are also passed back. Note that 1190 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1191 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1192 * (or rather should be) impossible for the device peripheral driver 1193 * list to change since we look at the whole thing in one pass, and 1194 * we do it with lock protection. 1195 * 1196 */ 1197 case CAMGETPASSTHRU: { 1198 union ccb *ccb; 1199 struct cam_periph *periph; 1200 struct periph_driver **p_drv; 1201 char *name; 1202 u_int unit; 1203 u_int cur_generation; 1204 int base_periph_found; 1205 int splbreaknum; 1206 1207 ccb = (union ccb *)ap->a_data; 1208 unit = ccb->cgdl.unit_number; 1209 name = ccb->cgdl.periph_name; 1210 /* 1211 * Every 100 devices, we want to drop our lock protection to 1212 * give the software interrupt handler a chance to run. 1213 * Most systems won't run into this check, but this should 1214 * avoid starvation in the software interrupt handler in 1215 * large systems. 1216 */ 1217 splbreaknum = 100; 1218 1219 ccb = (union ccb *)ap->a_data; 1220 1221 base_periph_found = 0; 1222 1223 /* 1224 * Sanity check -- make sure we don't get a null peripheral 1225 * driver name. 1226 */ 1227 if (*ccb->cgdl.periph_name == '\0') { 1228 error = EINVAL; 1229 break; 1230 } 1231 1232 /* Keep the list from changing while we traverse it */ 1233 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1234 ptstartover: 1235 cur_generation = xsoftc.xpt_generation; 1236 1237 /* first find our driver in the list of drivers */ 1238 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 1239 if (strcmp((*p_drv)->driver_name, name) == 0) 1240 break; 1241 } 1242 1243 if (*p_drv == NULL) { 1244 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1245 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1246 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1247 *ccb->cgdl.periph_name = '\0'; 1248 ccb->cgdl.unit_number = 0; 1249 error = ENOENT; 1250 break; 1251 } 1252 1253 /* 1254 * Run through every peripheral instance of this driver 1255 * and check to see whether it matches the unit passed 1256 * in by the user. If it does, get out of the loops and 1257 * find the passthrough driver associated with that 1258 * peripheral driver. 1259 */ 1260 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 1261 1262 if (periph->unit_number == unit) { 1263 break; 1264 } else if (--splbreaknum == 0) { 1265 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1266 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1267 splbreaknum = 100; 1268 if (cur_generation != xsoftc.xpt_generation) 1269 goto ptstartover; 1270 } 1271 } 1272 /* 1273 * If we found the peripheral driver that the user passed 1274 * in, go through all of the peripheral drivers for that 1275 * particular device and look for a passthrough driver. 1276 */ 1277 if (periph != NULL) { 1278 struct cam_ed *device; 1279 int i; 1280 1281 base_periph_found = 1; 1282 device = periph->path->device; 1283 for (i = 0, periph = SLIST_FIRST(&device->periphs); 1284 periph != NULL; 1285 periph = SLIST_NEXT(periph, periph_links), i++) { 1286 /* 1287 * Check to see whether we have a 1288 * passthrough device or not. 1289 */ 1290 if (strcmp(periph->periph_name, "pass") == 0) { 1291 /* 1292 * Fill in the getdevlist fields. 1293 */ 1294 strcpy(ccb->cgdl.periph_name, 1295 periph->periph_name); 1296 ccb->cgdl.unit_number = 1297 periph->unit_number; 1298 if (SLIST_NEXT(periph, periph_links)) 1299 ccb->cgdl.status = 1300 CAM_GDEVLIST_MORE_DEVS; 1301 else 1302 ccb->cgdl.status = 1303 CAM_GDEVLIST_LAST_DEVICE; 1304 ccb->cgdl.generation = 1305 device->generation; 1306 ccb->cgdl.index = i; 1307 /* 1308 * Fill in some CCB header fields 1309 * that the user may want. 1310 */ 1311 ccb->ccb_h.path_id = 1312 periph->path->bus->path_id; 1313 ccb->ccb_h.target_id = 1314 periph->path->target->target_id; 1315 ccb->ccb_h.target_lun = 1316 periph->path->device->lun_id; 1317 ccb->ccb_h.status = CAM_REQ_CMP; 1318 break; 1319 } 1320 } 1321 } 1322 1323 /* 1324 * If the periph is null here, one of two things has 1325 * happened. The first possibility is that we couldn't 1326 * find the unit number of the particular peripheral driver 1327 * that the user is asking about. e.g. the user asks for 1328 * the passthrough driver for "da11". We find the list of 1329 * "da" peripherals all right, but there is no unit 11. 1330 * The other possibility is that we went through the list 1331 * of peripheral drivers attached to the device structure, 1332 * but didn't find one with the name "pass". Either way, 1333 * we return ENOENT, since we couldn't find something. 1334 */ 1335 if (periph == NULL) { 1336 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1337 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1338 *ccb->cgdl.periph_name = '\0'; 1339 ccb->cgdl.unit_number = 0; 1340 error = ENOENT; 1341 /* 1342 * It is unfortunate that this is even necessary, 1343 * but there are many, many clueless users out there. 1344 * If this is true, the user is looking for the 1345 * passthrough driver, but doesn't have one in his 1346 * kernel. 1347 */ 1348 if (base_periph_found == 1) { 1349 kprintf("xptioctl: pass driver is not in the " 1350 "kernel\n"); 1351 kprintf("xptioctl: put \"device pass\" in " 1352 "your kernel config file\n"); 1353 } 1354 } 1355 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1356 break; 1357 } 1358 default: 1359 error = ENOTTY; 1360 break; 1361 } 1362 1363 return(error); 1364 } 1365 1366 static int 1367 cam_module_event_handler(module_t mod, int what, void *arg) 1368 { 1369 int error; 1370 1371 switch (what) { 1372 case MOD_LOAD: 1373 if ((error = xpt_init(NULL)) != 0) 1374 return (error); 1375 break; 1376 case MOD_UNLOAD: 1377 return EBUSY; 1378 default: 1379 return EOPNOTSUPP; 1380 } 1381 1382 return 0; 1383 } 1384 1385 /* 1386 * Thread to handle asynchronous main-context requests. 1387 * 1388 * This function is typically used by drivers to perform complex actions 1389 * such as bus scans and engineering requests in a main context instead 1390 * of an interrupt context. 1391 */ 1392 static void 1393 xpt_scanner_thread(void *dummy) 1394 { 1395 union ccb *ccb; 1396 struct cam_sim *sim; 1397 1398 get_mplock(); 1399 1400 for (;;) { 1401 xpt_lock_buses(); 1402 xsoftc.ccb_scanq_running = 1; 1403 while ((ccb = (void *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 1404 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, 1405 sim_links.tqe); 1406 xpt_unlock_buses(); 1407 1408 sim = ccb->ccb_h.path->bus->sim; 1409 CAM_SIM_LOCK(sim); 1410 xpt_action(ccb); 1411 CAM_SIM_UNLOCK(sim); 1412 1413 xpt_lock_buses(); 1414 } 1415 xsoftc.ccb_scanq_running = 0; 1416 tsleep_interlock(&xsoftc.ccb_scanq, 0); 1417 xpt_unlock_buses(); 1418 tsleep(&xsoftc.ccb_scanq, PINTERLOCKED, "ccb_scanq", 0); 1419 } 1420 1421 rel_mplock(); /* not reached */ 1422 } 1423 1424 /* 1425 * Issue an asynchronous asction 1426 */ 1427 void 1428 xpt_action_async(union ccb *ccb) 1429 { 1430 xpt_lock_buses(); 1431 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 1432 if (xsoftc.ccb_scanq_running == 0) { 1433 xsoftc.ccb_scanq_running = 1; 1434 wakeup(&xsoftc.ccb_scanq); 1435 } 1436 xpt_unlock_buses(); 1437 } 1438 1439 1440 /* Functions accessed by the peripheral drivers */ 1441 static int 1442 xpt_init(void *dummy) 1443 { 1444 struct cam_sim *xpt_sim; 1445 struct cam_path *path; 1446 struct cam_devq *devq; 1447 cam_status status; 1448 1449 TAILQ_INIT(&xsoftc.xpt_busses); 1450 TAILQ_INIT(&cam_simq); 1451 TAILQ_INIT(&xsoftc.ccb_scanq); 1452 STAILQ_INIT(&xsoftc.highpowerq); 1453 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 1454 1455 spin_init(&cam_simq_spin); 1456 lockinit(&xsoftc.xpt_lock, "XPT lock", 0, LK_CANRECURSE); 1457 lockinit(&xsoftc.xpt_topo_lock, "XPT topology lock", 0, LK_CANRECURSE); 1458 1459 SLIST_INIT(&cam_dead_sim.ccb_freeq); 1460 TAILQ_INIT(&cam_dead_sim.sim_doneq); 1461 spin_init(&cam_dead_sim.sim_spin); 1462 cam_dead_sim.sim_action = dead_sim_action; 1463 cam_dead_sim.sim_poll = dead_sim_poll; 1464 cam_dead_sim.sim_name = "dead_sim"; 1465 cam_dead_sim.lock = &cam_dead_lock; 1466 lockinit(&cam_dead_lock, "XPT dead_sim lock", 0, LK_CANRECURSE); 1467 cam_dead_sim.flags |= CAM_SIM_DEREGISTERED; 1468 1469 /* 1470 * The xpt layer is, itself, the equivelent of a SIM. 1471 * Allow 16 ccbs in the ccb pool for it. This should 1472 * give decent parallelism when we probe busses and 1473 * perform other XPT functions. 1474 */ 1475 devq = cam_simq_alloc(16); 1476 xpt_sim = cam_sim_alloc(xptaction, 1477 xptpoll, 1478 "xpt", 1479 /*softc*/NULL, 1480 /*unit*/0, 1481 /*lock*/&xsoftc.xpt_lock, 1482 /*max_dev_transactions*/0, 1483 /*max_tagged_dev_transactions*/0, 1484 devq); 1485 cam_simq_release(devq); 1486 if (xpt_sim == NULL) 1487 return (ENOMEM); 1488 1489 xpt_sim->max_ccbs = 16; 1490 1491 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 1492 if ((status = xpt_bus_register(xpt_sim, /*bus #*/0)) != CAM_SUCCESS) { 1493 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1494 kprintf("xpt_init: xpt_bus_register failed with status %#x," 1495 " failing attach\n", status); 1496 return (EINVAL); 1497 } 1498 1499 /* 1500 * Looking at the XPT from the SIM layer, the XPT is 1501 * the equivelent of a peripheral driver. Allocate 1502 * a peripheral driver entry for us. 1503 */ 1504 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1505 CAM_TARGET_WILDCARD, 1506 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1507 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1508 kprintf("xpt_init: xpt_create_path failed with status %#x," 1509 " failing attach\n", status); 1510 return (EINVAL); 1511 } 1512 1513 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1514 path, NULL, 0, xpt_sim); 1515 xpt_free_path(path); 1516 1517 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1518 1519 /* 1520 * Register a callback for when interrupts are enabled. 1521 */ 1522 xsoftc.xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1523 M_CAMXPT, M_INTWAIT | M_ZERO); 1524 xsoftc.xpt_config_hook->ich_func = xpt_config; 1525 xsoftc.xpt_config_hook->ich_desc = "xpt"; 1526 xsoftc.xpt_config_hook->ich_order = 1000; 1527 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 1528 kfree (xsoftc.xpt_config_hook, M_CAMXPT); 1529 kprintf("xpt_init: config_intrhook_establish failed " 1530 "- failing attach\n"); 1531 } 1532 1533 /* fire up rescan thread */ 1534 if (kthread_create(xpt_scanner_thread, NULL, NULL, "xpt_thrd")) { 1535 kprintf("xpt_init: failed to create rescan thread\n"); 1536 } 1537 /* Install our software interrupt handlers */ 1538 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL, -1); 1539 1540 return (0); 1541 } 1542 1543 static cam_status 1544 xptregister(struct cam_periph *periph, void *arg) 1545 { 1546 struct cam_sim *xpt_sim; 1547 1548 if (periph == NULL) { 1549 kprintf("xptregister: periph was NULL!!\n"); 1550 return(CAM_REQ_CMP_ERR); 1551 } 1552 1553 xpt_sim = (struct cam_sim *)arg; 1554 xpt_sim->softc = periph; 1555 xpt_periph = periph; 1556 periph->softc = NULL; 1557 1558 return(CAM_REQ_CMP); 1559 } 1560 1561 int32_t 1562 xpt_add_periph(struct cam_periph *periph) 1563 { 1564 struct cam_ed *device; 1565 int32_t status; 1566 struct periph_list *periph_head; 1567 1568 sim_lock_assert_owned(periph->sim->lock); 1569 1570 device = periph->path->device; 1571 1572 periph_head = &device->periphs; 1573 1574 status = CAM_REQ_CMP; 1575 1576 if (device != NULL) { 1577 /* 1578 * Make room for this peripheral 1579 * so it will fit in the queue 1580 * when it's scheduled to run 1581 */ 1582 status = camq_resize(&device->drvq, 1583 device->drvq.array_size + 1); 1584 1585 device->generation++; 1586 1587 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1588 } 1589 1590 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1591 xsoftc.xpt_generation++; 1592 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1593 1594 return (status); 1595 } 1596 1597 void 1598 xpt_remove_periph(struct cam_periph *periph) 1599 { 1600 struct cam_ed *device; 1601 1602 sim_lock_assert_owned(periph->sim->lock); 1603 1604 device = periph->path->device; 1605 1606 if (device != NULL) { 1607 struct periph_list *periph_head; 1608 1609 periph_head = &device->periphs; 1610 1611 /* Release the slot for this peripheral */ 1612 camq_resize(&device->drvq, device->drvq.array_size - 1); 1613 1614 device->generation++; 1615 1616 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1617 } 1618 1619 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1620 xsoftc.xpt_generation++; 1621 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1622 } 1623 1624 void 1625 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1626 { 1627 struct ccb_pathinq cpi; 1628 struct ccb_trans_settings cts; 1629 struct cam_path *path; 1630 u_int speed; 1631 u_int freq; 1632 u_int mb; 1633 1634 sim_lock_assert_owned(periph->sim->lock); 1635 1636 path = periph->path; 1637 1638 /* Report basic attachment and inquiry data */ 1639 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1640 periph->periph_name, periph->unit_number, 1641 path->bus->sim->sim_name, 1642 path->bus->sim->unit_number, 1643 path->bus->sim->bus_id, 1644 path->target->target_id, 1645 path->device->lun_id); 1646 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1647 scsi_print_inquiry(&path->device->inq_data); 1648 1649 /* Report serial number */ 1650 if (path->device->serial_num_len > 0) { 1651 /* Don't wrap the screen - print only the first 60 chars */ 1652 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1653 periph->unit_number, path->device->serial_num); 1654 } 1655 1656 /* Acquire and report transfer speed */ 1657 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1658 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1659 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1660 xpt_action((union ccb*)&cts); 1661 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1662 return; 1663 } 1664 1665 /* Ask the SIM for its base transfer speed */ 1666 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1667 cpi.ccb_h.func_code = XPT_PATH_INQ; 1668 xpt_action((union ccb *)&cpi); 1669 1670 speed = cpi.base_transfer_speed; 1671 freq = 0; 1672 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1673 struct ccb_trans_settings_spi *spi; 1674 1675 spi = &cts.xport_specific.spi; 1676 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1677 && spi->sync_offset != 0) { 1678 freq = scsi_calc_syncsrate(spi->sync_period); 1679 speed = freq; 1680 } 1681 1682 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1683 speed *= (0x01 << spi->bus_width); 1684 } 1685 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1686 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; 1687 if (fc->valid & CTS_FC_VALID_SPEED) { 1688 speed = fc->bitrate; 1689 } 1690 } 1691 1692 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { 1693 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; 1694 if (sas->valid & CTS_SAS_VALID_SPEED) { 1695 speed = sas->bitrate; 1696 } 1697 } 1698 1699 mb = speed / 1000; 1700 if (mb > 0) 1701 kprintf("%s%d: %d.%03dMB/s transfers", 1702 periph->periph_name, periph->unit_number, 1703 mb, speed % 1000); 1704 else 1705 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1706 periph->unit_number, speed); 1707 1708 /* Report additional information about SPI connections */ 1709 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1710 struct ccb_trans_settings_spi *spi; 1711 1712 spi = &cts.xport_specific.spi; 1713 if (freq != 0) { 1714 kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1715 freq % 1000, 1716 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1717 ? " DT" : "", 1718 spi->sync_offset); 1719 } 1720 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1721 && spi->bus_width > 0) { 1722 if (freq != 0) { 1723 kprintf(", "); 1724 } else { 1725 kprintf(" ("); 1726 } 1727 kprintf("%dbit)", 8 * (0x01 << spi->bus_width)); 1728 } else if (freq != 0) { 1729 kprintf(")"); 1730 } 1731 } 1732 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1733 struct ccb_trans_settings_fc *fc; 1734 1735 fc = &cts.xport_specific.fc; 1736 if (fc->valid & CTS_FC_VALID_WWNN) 1737 kprintf(" WWNN 0x%llx", (long long) fc->wwnn); 1738 if (fc->valid & CTS_FC_VALID_WWPN) 1739 kprintf(" WWPN 0x%llx", (long long) fc->wwpn); 1740 if (fc->valid & CTS_FC_VALID_PORT) 1741 kprintf(" PortID 0x%x", fc->port); 1742 } 1743 1744 if (path->device->inq_flags & SID_CmdQue 1745 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1746 kprintf("\n%s%d: Command Queueing Enabled", 1747 periph->periph_name, periph->unit_number); 1748 } 1749 kprintf("\n"); 1750 1751 /* 1752 * We only want to print the caller's announce string if they've 1753 * passed one in.. 1754 */ 1755 if (announce_string != NULL) 1756 kprintf("%s%d: %s\n", periph->periph_name, 1757 periph->unit_number, announce_string); 1758 } 1759 1760 static dev_match_ret 1761 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1762 struct cam_eb *bus) 1763 { 1764 dev_match_ret retval; 1765 int i; 1766 1767 retval = DM_RET_NONE; 1768 1769 /* 1770 * If we aren't given something to match against, that's an error. 1771 */ 1772 if (bus == NULL) 1773 return(DM_RET_ERROR); 1774 1775 /* 1776 * If there are no match entries, then this bus matches no 1777 * matter what. 1778 */ 1779 if ((patterns == NULL) || (num_patterns == 0)) 1780 return(DM_RET_DESCEND | DM_RET_COPY); 1781 1782 for (i = 0; i < num_patterns; i++) { 1783 struct bus_match_pattern *cur_pattern; 1784 1785 /* 1786 * If the pattern in question isn't for a bus node, we 1787 * aren't interested. However, we do indicate to the 1788 * calling routine that we should continue descending the 1789 * tree, since the user wants to match against lower-level 1790 * EDT elements. 1791 */ 1792 if (patterns[i].type != DEV_MATCH_BUS) { 1793 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1794 retval |= DM_RET_DESCEND; 1795 continue; 1796 } 1797 1798 cur_pattern = &patterns[i].pattern.bus_pattern; 1799 1800 /* 1801 * If they want to match any bus node, we give them any 1802 * device node. 1803 */ 1804 if (cur_pattern->flags == BUS_MATCH_ANY) { 1805 /* set the copy flag */ 1806 retval |= DM_RET_COPY; 1807 1808 /* 1809 * If we've already decided on an action, go ahead 1810 * and return. 1811 */ 1812 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1813 return(retval); 1814 } 1815 1816 /* 1817 * Not sure why someone would do this... 1818 */ 1819 if (cur_pattern->flags == BUS_MATCH_NONE) 1820 continue; 1821 1822 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1823 && (cur_pattern->path_id != bus->path_id)) 1824 continue; 1825 1826 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1827 && (cur_pattern->bus_id != bus->sim->bus_id)) 1828 continue; 1829 1830 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1831 && (cur_pattern->unit_number != bus->sim->unit_number)) 1832 continue; 1833 1834 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1835 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1836 DEV_IDLEN) != 0)) 1837 continue; 1838 1839 /* 1840 * If we get to this point, the user definitely wants 1841 * information on this bus. So tell the caller to copy the 1842 * data out. 1843 */ 1844 retval |= DM_RET_COPY; 1845 1846 /* 1847 * If the return action has been set to descend, then we 1848 * know that we've already seen a non-bus matching 1849 * expression, therefore we need to further descend the tree. 1850 * This won't change by continuing around the loop, so we 1851 * go ahead and return. If we haven't seen a non-bus 1852 * matching expression, we keep going around the loop until 1853 * we exhaust the matching expressions. We'll set the stop 1854 * flag once we fall out of the loop. 1855 */ 1856 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1857 return(retval); 1858 } 1859 1860 /* 1861 * If the return action hasn't been set to descend yet, that means 1862 * we haven't seen anything other than bus matching patterns. So 1863 * tell the caller to stop descending the tree -- the user doesn't 1864 * want to match against lower level tree elements. 1865 */ 1866 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1867 retval |= DM_RET_STOP; 1868 1869 return(retval); 1870 } 1871 1872 static dev_match_ret 1873 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1874 struct cam_ed *device) 1875 { 1876 dev_match_ret retval; 1877 int i; 1878 1879 retval = DM_RET_NONE; 1880 1881 /* 1882 * If we aren't given something to match against, that's an error. 1883 */ 1884 if (device == NULL) 1885 return(DM_RET_ERROR); 1886 1887 /* 1888 * If there are no match entries, then this device matches no 1889 * matter what. 1890 */ 1891 if ((patterns == NULL) || (num_patterns == 0)) 1892 return(DM_RET_DESCEND | DM_RET_COPY); 1893 1894 for (i = 0; i < num_patterns; i++) { 1895 struct device_match_pattern *cur_pattern; 1896 1897 /* 1898 * If the pattern in question isn't for a device node, we 1899 * aren't interested. 1900 */ 1901 if (patterns[i].type != DEV_MATCH_DEVICE) { 1902 if ((patterns[i].type == DEV_MATCH_PERIPH) 1903 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1904 retval |= DM_RET_DESCEND; 1905 continue; 1906 } 1907 1908 cur_pattern = &patterns[i].pattern.device_pattern; 1909 1910 /* 1911 * If they want to match any device node, we give them any 1912 * device node. 1913 */ 1914 if (cur_pattern->flags == DEV_MATCH_ANY) { 1915 /* set the copy flag */ 1916 retval |= DM_RET_COPY; 1917 1918 1919 /* 1920 * If we've already decided on an action, go ahead 1921 * and return. 1922 */ 1923 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1924 return(retval); 1925 } 1926 1927 /* 1928 * Not sure why someone would do this... 1929 */ 1930 if (cur_pattern->flags == DEV_MATCH_NONE) 1931 continue; 1932 1933 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1934 && (cur_pattern->path_id != device->target->bus->path_id)) 1935 continue; 1936 1937 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1938 && (cur_pattern->target_id != device->target->target_id)) 1939 continue; 1940 1941 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1942 && (cur_pattern->target_lun != device->lun_id)) 1943 continue; 1944 1945 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1946 && (cam_quirkmatch((caddr_t)&device->inq_data, 1947 (caddr_t)&cur_pattern->inq_pat, 1948 1, sizeof(cur_pattern->inq_pat), 1949 scsi_static_inquiry_match) == NULL)) 1950 continue; 1951 1952 /* 1953 * If we get to this point, the user definitely wants 1954 * information on this device. So tell the caller to copy 1955 * the data out. 1956 */ 1957 retval |= DM_RET_COPY; 1958 1959 /* 1960 * If the return action has been set to descend, then we 1961 * know that we've already seen a peripheral matching 1962 * expression, therefore we need to further descend the tree. 1963 * This won't change by continuing around the loop, so we 1964 * go ahead and return. If we haven't seen a peripheral 1965 * matching expression, we keep going around the loop until 1966 * we exhaust the matching expressions. We'll set the stop 1967 * flag once we fall out of the loop. 1968 */ 1969 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1970 return(retval); 1971 } 1972 1973 /* 1974 * If the return action hasn't been set to descend yet, that means 1975 * we haven't seen any peripheral matching patterns. So tell the 1976 * caller to stop descending the tree -- the user doesn't want to 1977 * match against lower level tree elements. 1978 */ 1979 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1980 retval |= DM_RET_STOP; 1981 1982 return(retval); 1983 } 1984 1985 /* 1986 * Match a single peripheral against any number of match patterns. 1987 */ 1988 static dev_match_ret 1989 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1990 struct cam_periph *periph) 1991 { 1992 dev_match_ret retval; 1993 int i; 1994 1995 /* 1996 * If we aren't given something to match against, that's an error. 1997 */ 1998 if (periph == NULL) 1999 return(DM_RET_ERROR); 2000 2001 /* 2002 * If there are no match entries, then this peripheral matches no 2003 * matter what. 2004 */ 2005 if ((patterns == NULL) || (num_patterns == 0)) 2006 return(DM_RET_STOP | DM_RET_COPY); 2007 2008 /* 2009 * There aren't any nodes below a peripheral node, so there's no 2010 * reason to descend the tree any further. 2011 */ 2012 retval = DM_RET_STOP; 2013 2014 for (i = 0; i < num_patterns; i++) { 2015 struct periph_match_pattern *cur_pattern; 2016 2017 /* 2018 * If the pattern in question isn't for a peripheral, we 2019 * aren't interested. 2020 */ 2021 if (patterns[i].type != DEV_MATCH_PERIPH) 2022 continue; 2023 2024 cur_pattern = &patterns[i].pattern.periph_pattern; 2025 2026 /* 2027 * If they want to match on anything, then we will do so. 2028 */ 2029 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 2030 /* set the copy flag */ 2031 retval |= DM_RET_COPY; 2032 2033 /* 2034 * We've already set the return action to stop, 2035 * since there are no nodes below peripherals in 2036 * the tree. 2037 */ 2038 return(retval); 2039 } 2040 2041 /* 2042 * Not sure why someone would do this... 2043 */ 2044 if (cur_pattern->flags == PERIPH_MATCH_NONE) 2045 continue; 2046 2047 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 2048 && (cur_pattern->path_id != periph->path->bus->path_id)) 2049 continue; 2050 2051 /* 2052 * For the target and lun id's, we have to make sure the 2053 * target and lun pointers aren't NULL. The xpt peripheral 2054 * has a wildcard target and device. 2055 */ 2056 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 2057 && ((periph->path->target == NULL) 2058 ||(cur_pattern->target_id != periph->path->target->target_id))) 2059 continue; 2060 2061 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 2062 && ((periph->path->device == NULL) 2063 || (cur_pattern->target_lun != periph->path->device->lun_id))) 2064 continue; 2065 2066 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 2067 && (cur_pattern->unit_number != periph->unit_number)) 2068 continue; 2069 2070 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 2071 && (strncmp(cur_pattern->periph_name, periph->periph_name, 2072 DEV_IDLEN) != 0)) 2073 continue; 2074 2075 /* 2076 * If we get to this point, the user definitely wants 2077 * information on this peripheral. So tell the caller to 2078 * copy the data out. 2079 */ 2080 retval |= DM_RET_COPY; 2081 2082 /* 2083 * The return action has already been set to stop, since 2084 * peripherals don't have any nodes below them in the EDT. 2085 */ 2086 return(retval); 2087 } 2088 2089 /* 2090 * If we get to this point, the peripheral that was passed in 2091 * doesn't match any of the patterns. 2092 */ 2093 return(retval); 2094 } 2095 2096 static int 2097 xptedtbusfunc(struct cam_eb *bus, void *arg) 2098 { 2099 struct ccb_dev_match *cdm; 2100 dev_match_ret retval; 2101 2102 cdm = (struct ccb_dev_match *)arg; 2103 2104 /* 2105 * If our position is for something deeper in the tree, that means 2106 * that we've already seen this node. So, we keep going down. 2107 */ 2108 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2109 && (cdm->pos.cookie.bus == bus) 2110 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2111 && (cdm->pos.cookie.target != NULL)) 2112 retval = DM_RET_DESCEND; 2113 else 2114 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 2115 2116 /* 2117 * If we got an error, bail out of the search. 2118 */ 2119 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2120 cdm->status = CAM_DEV_MATCH_ERROR; 2121 return(0); 2122 } 2123 2124 /* 2125 * If the copy flag is set, copy this bus out. 2126 */ 2127 if (retval & DM_RET_COPY) { 2128 int spaceleft, j; 2129 2130 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2131 sizeof(struct dev_match_result)); 2132 2133 /* 2134 * If we don't have enough space to put in another 2135 * match result, save our position and tell the 2136 * user there are more devices to check. 2137 */ 2138 if (spaceleft < sizeof(struct dev_match_result)) { 2139 bzero(&cdm->pos, sizeof(cdm->pos)); 2140 cdm->pos.position_type = 2141 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 2142 2143 cdm->pos.cookie.bus = bus; 2144 cdm->pos.generations[CAM_BUS_GENERATION]= 2145 xsoftc.bus_generation; 2146 cdm->status = CAM_DEV_MATCH_MORE; 2147 return(0); 2148 } 2149 j = cdm->num_matches; 2150 cdm->num_matches++; 2151 cdm->matches[j].type = DEV_MATCH_BUS; 2152 cdm->matches[j].result.bus_result.path_id = bus->path_id; 2153 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 2154 cdm->matches[j].result.bus_result.unit_number = 2155 bus->sim->unit_number; 2156 strncpy(cdm->matches[j].result.bus_result.dev_name, 2157 bus->sim->sim_name, DEV_IDLEN); 2158 } 2159 2160 /* 2161 * If the user is only interested in busses, there's no 2162 * reason to descend to the next level in the tree. 2163 */ 2164 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2165 return(1); 2166 2167 /* 2168 * If there is a target generation recorded, check it to 2169 * make sure the target list hasn't changed. 2170 */ 2171 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2172 && (bus == cdm->pos.cookie.bus) 2173 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2174 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 2175 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 2176 bus->generation)) { 2177 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2178 return(0); 2179 } 2180 2181 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2182 && (cdm->pos.cookie.bus == bus) 2183 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2184 && (cdm->pos.cookie.target != NULL)) 2185 return(xpttargettraverse(bus, 2186 (struct cam_et *)cdm->pos.cookie.target, 2187 xptedttargetfunc, arg)); 2188 else 2189 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 2190 } 2191 2192 static int 2193 xptedttargetfunc(struct cam_et *target, void *arg) 2194 { 2195 struct ccb_dev_match *cdm; 2196 2197 cdm = (struct ccb_dev_match *)arg; 2198 2199 /* 2200 * If there is a device list generation recorded, check it to 2201 * make sure the device list hasn't changed. 2202 */ 2203 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2204 && (cdm->pos.cookie.bus == target->bus) 2205 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2206 && (cdm->pos.cookie.target == target) 2207 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2208 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2209 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2210 target->generation)) { 2211 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2212 return(0); 2213 } 2214 2215 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2216 && (cdm->pos.cookie.bus == target->bus) 2217 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2218 && (cdm->pos.cookie.target == target) 2219 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2220 && (cdm->pos.cookie.device != NULL)) 2221 return(xptdevicetraverse(target, 2222 (struct cam_ed *)cdm->pos.cookie.device, 2223 xptedtdevicefunc, arg)); 2224 else 2225 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2226 } 2227 2228 static int 2229 xptedtdevicefunc(struct cam_ed *device, void *arg) 2230 { 2231 2232 struct ccb_dev_match *cdm; 2233 dev_match_ret retval; 2234 2235 cdm = (struct ccb_dev_match *)arg; 2236 2237 /* 2238 * If our position is for something deeper in the tree, that means 2239 * that we've already seen this node. So, we keep going down. 2240 */ 2241 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2242 && (cdm->pos.cookie.device == device) 2243 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2244 && (cdm->pos.cookie.periph != NULL)) 2245 retval = DM_RET_DESCEND; 2246 else 2247 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2248 device); 2249 2250 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2251 cdm->status = CAM_DEV_MATCH_ERROR; 2252 return(0); 2253 } 2254 2255 /* 2256 * If the copy flag is set, copy this device out. 2257 */ 2258 if (retval & DM_RET_COPY) { 2259 int spaceleft, j; 2260 2261 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2262 sizeof(struct dev_match_result)); 2263 2264 /* 2265 * If we don't have enough space to put in another 2266 * match result, save our position and tell the 2267 * user there are more devices to check. 2268 */ 2269 if (spaceleft < sizeof(struct dev_match_result)) { 2270 bzero(&cdm->pos, sizeof(cdm->pos)); 2271 cdm->pos.position_type = 2272 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2273 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2274 2275 cdm->pos.cookie.bus = device->target->bus; 2276 cdm->pos.generations[CAM_BUS_GENERATION]= 2277 xsoftc.bus_generation; 2278 cdm->pos.cookie.target = device->target; 2279 cdm->pos.generations[CAM_TARGET_GENERATION] = 2280 device->target->bus->generation; 2281 cdm->pos.cookie.device = device; 2282 cdm->pos.generations[CAM_DEV_GENERATION] = 2283 device->target->generation; 2284 cdm->status = CAM_DEV_MATCH_MORE; 2285 return(0); 2286 } 2287 j = cdm->num_matches; 2288 cdm->num_matches++; 2289 cdm->matches[j].type = DEV_MATCH_DEVICE; 2290 cdm->matches[j].result.device_result.path_id = 2291 device->target->bus->path_id; 2292 cdm->matches[j].result.device_result.target_id = 2293 device->target->target_id; 2294 cdm->matches[j].result.device_result.target_lun = 2295 device->lun_id; 2296 bcopy(&device->inq_data, 2297 &cdm->matches[j].result.device_result.inq_data, 2298 sizeof(struct scsi_inquiry_data)); 2299 2300 /* Let the user know whether this device is unconfigured */ 2301 if (device->flags & CAM_DEV_UNCONFIGURED) 2302 cdm->matches[j].result.device_result.flags = 2303 DEV_RESULT_UNCONFIGURED; 2304 else 2305 cdm->matches[j].result.device_result.flags = 2306 DEV_RESULT_NOFLAG; 2307 } 2308 2309 /* 2310 * If the user isn't interested in peripherals, don't descend 2311 * the tree any further. 2312 */ 2313 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2314 return(1); 2315 2316 /* 2317 * If there is a peripheral list generation recorded, make sure 2318 * it hasn't changed. 2319 */ 2320 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2321 && (device->target->bus == cdm->pos.cookie.bus) 2322 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2323 && (device->target == cdm->pos.cookie.target) 2324 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2325 && (device == cdm->pos.cookie.device) 2326 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2327 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2328 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2329 device->generation)){ 2330 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2331 return(0); 2332 } 2333 2334 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2335 && (cdm->pos.cookie.bus == device->target->bus) 2336 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2337 && (cdm->pos.cookie.target == device->target) 2338 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2339 && (cdm->pos.cookie.device == device) 2340 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2341 && (cdm->pos.cookie.periph != NULL)) 2342 return(xptperiphtraverse(device, 2343 (struct cam_periph *)cdm->pos.cookie.periph, 2344 xptedtperiphfunc, arg)); 2345 else 2346 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2347 } 2348 2349 static int 2350 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2351 { 2352 struct ccb_dev_match *cdm; 2353 dev_match_ret retval; 2354 2355 cdm = (struct ccb_dev_match *)arg; 2356 2357 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2358 2359 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2360 cdm->status = CAM_DEV_MATCH_ERROR; 2361 return(0); 2362 } 2363 2364 /* 2365 * If the copy flag is set, copy this peripheral out. 2366 */ 2367 if (retval & DM_RET_COPY) { 2368 int spaceleft, j; 2369 2370 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2371 sizeof(struct dev_match_result)); 2372 2373 /* 2374 * If we don't have enough space to put in another 2375 * match result, save our position and tell the 2376 * user there are more devices to check. 2377 */ 2378 if (spaceleft < sizeof(struct dev_match_result)) { 2379 bzero(&cdm->pos, sizeof(cdm->pos)); 2380 cdm->pos.position_type = 2381 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2382 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2383 CAM_DEV_POS_PERIPH; 2384 2385 cdm->pos.cookie.bus = periph->path->bus; 2386 cdm->pos.generations[CAM_BUS_GENERATION]= 2387 xsoftc.bus_generation; 2388 cdm->pos.cookie.target = periph->path->target; 2389 cdm->pos.generations[CAM_TARGET_GENERATION] = 2390 periph->path->bus->generation; 2391 cdm->pos.cookie.device = periph->path->device; 2392 cdm->pos.generations[CAM_DEV_GENERATION] = 2393 periph->path->target->generation; 2394 cdm->pos.cookie.periph = periph; 2395 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2396 periph->path->device->generation; 2397 cdm->status = CAM_DEV_MATCH_MORE; 2398 return(0); 2399 } 2400 2401 j = cdm->num_matches; 2402 cdm->num_matches++; 2403 cdm->matches[j].type = DEV_MATCH_PERIPH; 2404 cdm->matches[j].result.periph_result.path_id = 2405 periph->path->bus->path_id; 2406 cdm->matches[j].result.periph_result.target_id = 2407 periph->path->target->target_id; 2408 cdm->matches[j].result.periph_result.target_lun = 2409 periph->path->device->lun_id; 2410 cdm->matches[j].result.periph_result.unit_number = 2411 periph->unit_number; 2412 strncpy(cdm->matches[j].result.periph_result.periph_name, 2413 periph->periph_name, DEV_IDLEN); 2414 } 2415 2416 return(1); 2417 } 2418 2419 static int 2420 xptedtmatch(struct ccb_dev_match *cdm) 2421 { 2422 int ret; 2423 2424 cdm->num_matches = 0; 2425 2426 /* 2427 * Check the bus list generation. If it has changed, the user 2428 * needs to reset everything and start over. 2429 */ 2430 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2431 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2432 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 2433 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2434 return(0); 2435 } 2436 2437 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2438 && (cdm->pos.cookie.bus != NULL)) 2439 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2440 xptedtbusfunc, cdm); 2441 else 2442 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2443 2444 /* 2445 * If we get back 0, that means that we had to stop before fully 2446 * traversing the EDT. It also means that one of the subroutines 2447 * has set the status field to the proper value. If we get back 1, 2448 * we've fully traversed the EDT and copied out any matching entries. 2449 */ 2450 if (ret == 1) 2451 cdm->status = CAM_DEV_MATCH_LAST; 2452 2453 return(ret); 2454 } 2455 2456 static int 2457 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2458 { 2459 struct ccb_dev_match *cdm; 2460 2461 cdm = (struct ccb_dev_match *)arg; 2462 2463 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2464 && (cdm->pos.cookie.pdrv == pdrv) 2465 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2466 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2467 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2468 (*pdrv)->generation)) { 2469 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2470 return(0); 2471 } 2472 2473 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2474 && (cdm->pos.cookie.pdrv == pdrv) 2475 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2476 && (cdm->pos.cookie.periph != NULL)) 2477 return(xptpdperiphtraverse(pdrv, 2478 (struct cam_periph *)cdm->pos.cookie.periph, 2479 xptplistperiphfunc, arg)); 2480 else 2481 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2482 } 2483 2484 static int 2485 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2486 { 2487 struct ccb_dev_match *cdm; 2488 dev_match_ret retval; 2489 2490 cdm = (struct ccb_dev_match *)arg; 2491 2492 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2493 2494 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2495 cdm->status = CAM_DEV_MATCH_ERROR; 2496 return(0); 2497 } 2498 2499 /* 2500 * If the copy flag is set, copy this peripheral out. 2501 */ 2502 if (retval & DM_RET_COPY) { 2503 int spaceleft, j; 2504 2505 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2506 sizeof(struct dev_match_result)); 2507 2508 /* 2509 * If we don't have enough space to put in another 2510 * match result, save our position and tell the 2511 * user there are more devices to check. 2512 */ 2513 if (spaceleft < sizeof(struct dev_match_result)) { 2514 struct periph_driver **pdrv; 2515 2516 pdrv = NULL; 2517 bzero(&cdm->pos, sizeof(cdm->pos)); 2518 cdm->pos.position_type = 2519 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2520 CAM_DEV_POS_PERIPH; 2521 2522 /* 2523 * This may look a bit non-sensical, but it is 2524 * actually quite logical. There are very few 2525 * peripheral drivers, and bloating every peripheral 2526 * structure with a pointer back to its parent 2527 * peripheral driver linker set entry would cost 2528 * more in the long run than doing this quick lookup. 2529 */ 2530 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2531 if (strcmp((*pdrv)->driver_name, 2532 periph->periph_name) == 0) 2533 break; 2534 } 2535 2536 if (*pdrv == NULL) { 2537 cdm->status = CAM_DEV_MATCH_ERROR; 2538 return(0); 2539 } 2540 2541 cdm->pos.cookie.pdrv = pdrv; 2542 /* 2543 * The periph generation slot does double duty, as 2544 * does the periph pointer slot. They are used for 2545 * both edt and pdrv lookups and positioning. 2546 */ 2547 cdm->pos.cookie.periph = periph; 2548 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2549 (*pdrv)->generation; 2550 cdm->status = CAM_DEV_MATCH_MORE; 2551 return(0); 2552 } 2553 2554 j = cdm->num_matches; 2555 cdm->num_matches++; 2556 cdm->matches[j].type = DEV_MATCH_PERIPH; 2557 cdm->matches[j].result.periph_result.path_id = 2558 periph->path->bus->path_id; 2559 2560 /* 2561 * The transport layer peripheral doesn't have a target or 2562 * lun. 2563 */ 2564 if (periph->path->target) 2565 cdm->matches[j].result.periph_result.target_id = 2566 periph->path->target->target_id; 2567 else 2568 cdm->matches[j].result.periph_result.target_id = -1; 2569 2570 if (periph->path->device) 2571 cdm->matches[j].result.periph_result.target_lun = 2572 periph->path->device->lun_id; 2573 else 2574 cdm->matches[j].result.periph_result.target_lun = -1; 2575 2576 cdm->matches[j].result.periph_result.unit_number = 2577 periph->unit_number; 2578 strncpy(cdm->matches[j].result.periph_result.periph_name, 2579 periph->periph_name, DEV_IDLEN); 2580 } 2581 2582 return(1); 2583 } 2584 2585 static int 2586 xptperiphlistmatch(struct ccb_dev_match *cdm) 2587 { 2588 int ret; 2589 2590 cdm->num_matches = 0; 2591 2592 /* 2593 * At this point in the edt traversal function, we check the bus 2594 * list generation to make sure that no busses have been added or 2595 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2596 * For the peripheral driver list traversal function, however, we 2597 * don't have to worry about new peripheral driver types coming or 2598 * going; they're in a linker set, and therefore can't change 2599 * without a recompile. 2600 */ 2601 2602 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2603 && (cdm->pos.cookie.pdrv != NULL)) 2604 ret = xptpdrvtraverse( 2605 (struct periph_driver **)cdm->pos.cookie.pdrv, 2606 xptplistpdrvfunc, cdm); 2607 else 2608 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2609 2610 /* 2611 * If we get back 0, that means that we had to stop before fully 2612 * traversing the peripheral driver tree. It also means that one of 2613 * the subroutines has set the status field to the proper value. If 2614 * we get back 1, we've fully traversed the EDT and copied out any 2615 * matching entries. 2616 */ 2617 if (ret == 1) 2618 cdm->status = CAM_DEV_MATCH_LAST; 2619 2620 return(ret); 2621 } 2622 2623 static int 2624 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2625 { 2626 struct cam_eb *bus, *next_bus; 2627 int retval; 2628 2629 retval = 1; 2630 2631 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2632 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 2633 bus != NULL; 2634 bus = next_bus) { 2635 next_bus = TAILQ_NEXT(bus, links); 2636 2637 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2638 CAM_SIM_LOCK(bus->sim); 2639 retval = tr_func(bus, arg); 2640 CAM_SIM_UNLOCK(bus->sim); 2641 if (retval == 0) 2642 return(retval); 2643 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2644 } 2645 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2646 2647 return(retval); 2648 } 2649 2650 static int 2651 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2652 xpt_targetfunc_t *tr_func, void *arg) 2653 { 2654 struct cam_et *target, *next_target; 2655 int retval; 2656 2657 retval = 1; 2658 for (target = (start_target ? start_target : 2659 TAILQ_FIRST(&bus->et_entries)); 2660 target != NULL; target = next_target) { 2661 2662 next_target = TAILQ_NEXT(target, links); 2663 2664 retval = tr_func(target, arg); 2665 2666 if (retval == 0) 2667 return(retval); 2668 } 2669 2670 return(retval); 2671 } 2672 2673 static int 2674 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2675 xpt_devicefunc_t *tr_func, void *arg) 2676 { 2677 struct cam_ed *device, *next_device; 2678 int retval; 2679 2680 retval = 1; 2681 for (device = (start_device ? start_device : 2682 TAILQ_FIRST(&target->ed_entries)); 2683 device != NULL; 2684 device = next_device) { 2685 2686 next_device = TAILQ_NEXT(device, links); 2687 2688 retval = tr_func(device, arg); 2689 2690 if (retval == 0) 2691 return(retval); 2692 } 2693 2694 return(retval); 2695 } 2696 2697 static int 2698 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2699 xpt_periphfunc_t *tr_func, void *arg) 2700 { 2701 struct cam_periph *periph, *next_periph; 2702 int retval; 2703 2704 retval = 1; 2705 2706 for (periph = (start_periph ? start_periph : 2707 SLIST_FIRST(&device->periphs)); 2708 periph != NULL; 2709 periph = next_periph) { 2710 2711 next_periph = SLIST_NEXT(periph, periph_links); 2712 2713 retval = tr_func(periph, arg); 2714 if (retval == 0) 2715 return(retval); 2716 } 2717 2718 return(retval); 2719 } 2720 2721 static int 2722 xptpdrvtraverse(struct periph_driver **start_pdrv, 2723 xpt_pdrvfunc_t *tr_func, void *arg) 2724 { 2725 struct periph_driver **pdrv; 2726 int retval; 2727 2728 retval = 1; 2729 2730 /* 2731 * We don't traverse the peripheral driver list like we do the 2732 * other lists, because it is a linker set, and therefore cannot be 2733 * changed during runtime. If the peripheral driver list is ever 2734 * re-done to be something other than a linker set (i.e. it can 2735 * change while the system is running), the list traversal should 2736 * be modified to work like the other traversal functions. 2737 */ 2738 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2739 *pdrv != NULL; pdrv++) { 2740 retval = tr_func(pdrv, arg); 2741 2742 if (retval == 0) 2743 return(retval); 2744 } 2745 2746 return(retval); 2747 } 2748 2749 static int 2750 xptpdperiphtraverse(struct periph_driver **pdrv, 2751 struct cam_periph *start_periph, 2752 xpt_periphfunc_t *tr_func, void *arg) 2753 { 2754 struct cam_periph *periph, *next_periph; 2755 int retval; 2756 2757 retval = 1; 2758 2759 for (periph = (start_periph ? start_periph : 2760 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2761 periph = next_periph) { 2762 2763 next_periph = TAILQ_NEXT(periph, unit_links); 2764 2765 retval = tr_func(periph, arg); 2766 if (retval == 0) 2767 return(retval); 2768 } 2769 return(retval); 2770 } 2771 2772 static int 2773 xptdefbusfunc(struct cam_eb *bus, void *arg) 2774 { 2775 struct xpt_traverse_config *tr_config; 2776 2777 tr_config = (struct xpt_traverse_config *)arg; 2778 2779 if (tr_config->depth == XPT_DEPTH_BUS) { 2780 xpt_busfunc_t *tr_func; 2781 2782 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2783 2784 return(tr_func(bus, tr_config->tr_arg)); 2785 } else 2786 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2787 } 2788 2789 static int 2790 xptdeftargetfunc(struct cam_et *target, void *arg) 2791 { 2792 struct xpt_traverse_config *tr_config; 2793 2794 tr_config = (struct xpt_traverse_config *)arg; 2795 2796 if (tr_config->depth == XPT_DEPTH_TARGET) { 2797 xpt_targetfunc_t *tr_func; 2798 2799 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2800 2801 return(tr_func(target, tr_config->tr_arg)); 2802 } else 2803 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2804 } 2805 2806 static int 2807 xptdefdevicefunc(struct cam_ed *device, void *arg) 2808 { 2809 struct xpt_traverse_config *tr_config; 2810 2811 tr_config = (struct xpt_traverse_config *)arg; 2812 2813 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2814 xpt_devicefunc_t *tr_func; 2815 2816 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2817 2818 return(tr_func(device, tr_config->tr_arg)); 2819 } else 2820 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2821 } 2822 2823 static int 2824 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2825 { 2826 struct xpt_traverse_config *tr_config; 2827 xpt_periphfunc_t *tr_func; 2828 2829 tr_config = (struct xpt_traverse_config *)arg; 2830 2831 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2832 2833 /* 2834 * Unlike the other default functions, we don't check for depth 2835 * here. The peripheral driver level is the last level in the EDT, 2836 * so if we're here, we should execute the function in question. 2837 */ 2838 return(tr_func(periph, tr_config->tr_arg)); 2839 } 2840 2841 /* 2842 * Execute the given function for every bus in the EDT. 2843 */ 2844 static int 2845 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2846 { 2847 struct xpt_traverse_config tr_config; 2848 2849 tr_config.depth = XPT_DEPTH_BUS; 2850 tr_config.tr_func = tr_func; 2851 tr_config.tr_arg = arg; 2852 2853 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2854 } 2855 2856 /* 2857 * Execute the given function for every device in the EDT. 2858 */ 2859 static int 2860 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2861 { 2862 struct xpt_traverse_config tr_config; 2863 2864 tr_config.depth = XPT_DEPTH_DEVICE; 2865 tr_config.tr_func = tr_func; 2866 tr_config.tr_arg = arg; 2867 2868 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2869 } 2870 2871 static int 2872 xptsetasyncfunc(struct cam_ed *device, void *arg) 2873 { 2874 struct cam_path path; 2875 struct ccb_getdev cgd; 2876 struct async_node *cur_entry; 2877 2878 cur_entry = (struct async_node *)arg; 2879 2880 /* 2881 * Don't report unconfigured devices (Wildcard devs, 2882 * devices only for target mode, device instances 2883 * that have been invalidated but are waiting for 2884 * their last reference count to be released). 2885 */ 2886 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2887 return (1); 2888 2889 xpt_compile_path(&path, 2890 NULL, 2891 device->target->bus->path_id, 2892 device->target->target_id, 2893 device->lun_id); 2894 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2895 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2896 xpt_action((union ccb *)&cgd); 2897 cur_entry->callback(cur_entry->callback_arg, 2898 AC_FOUND_DEVICE, 2899 &path, &cgd); 2900 xpt_release_path(&path); 2901 2902 return(1); 2903 } 2904 2905 static int 2906 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2907 { 2908 struct cam_path path; 2909 struct ccb_pathinq cpi; 2910 struct async_node *cur_entry; 2911 2912 cur_entry = (struct async_node *)arg; 2913 2914 xpt_compile_path(&path, /*periph*/NULL, 2915 bus->sim->path_id, 2916 CAM_TARGET_WILDCARD, 2917 CAM_LUN_WILDCARD); 2918 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2919 cpi.ccb_h.func_code = XPT_PATH_INQ; 2920 xpt_action((union ccb *)&cpi); 2921 cur_entry->callback(cur_entry->callback_arg, 2922 AC_PATH_REGISTERED, 2923 &path, &cpi); 2924 xpt_release_path(&path); 2925 2926 return(1); 2927 } 2928 2929 static void 2930 xpt_action_sasync_cb(void *context, int pending) 2931 { 2932 struct async_node *cur_entry; 2933 struct xpt_task *task; 2934 uint32_t added; 2935 2936 task = (struct xpt_task *)context; 2937 cur_entry = (struct async_node *)task->data1; 2938 added = task->data2; 2939 2940 if ((added & AC_FOUND_DEVICE) != 0) { 2941 /* 2942 * Get this peripheral up to date with all 2943 * the currently existing devices. 2944 */ 2945 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 2946 } 2947 if ((added & AC_PATH_REGISTERED) != 0) { 2948 /* 2949 * Get this peripheral up to date with all 2950 * the currently existing busses. 2951 */ 2952 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 2953 } 2954 kfree(task, M_CAMXPT); 2955 } 2956 2957 void 2958 xpt_action(union ccb *start_ccb) 2959 { 2960 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2961 2962 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2963 2964 switch (start_ccb->ccb_h.func_code) { 2965 case XPT_SCSI_IO: 2966 case XPT_TRIM: 2967 { 2968 struct cam_ed *device; 2969 #ifdef CAMDEBUG 2970 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2971 struct cam_path *path; 2972 2973 path = start_ccb->ccb_h.path; 2974 #endif 2975 2976 /* 2977 * For the sake of compatibility with SCSI-1 2978 * devices that may not understand the identify 2979 * message, we include lun information in the 2980 * second byte of all commands. SCSI-1 specifies 2981 * that luns are a 3 bit value and reserves only 3 2982 * bits for lun information in the CDB. Later 2983 * revisions of the SCSI spec allow for more than 8 2984 * luns, but have deprecated lun information in the 2985 * CDB. So, if the lun won't fit, we must omit. 2986 * 2987 * Also be aware that during initial probing for devices, 2988 * the inquiry information is unknown but initialized to 0. 2989 * This means that this code will be exercised while probing 2990 * devices with an ANSI revision greater than 2. 2991 */ 2992 device = start_ccb->ccb_h.path->device; 2993 if (device->protocol_version <= SCSI_REV_2 2994 && start_ccb->ccb_h.target_lun < 8 2995 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2996 2997 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2998 start_ccb->ccb_h.target_lun << 5; 2999 } 3000 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 3001 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 3002 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 3003 &path->device->inq_data), 3004 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 3005 cdb_str, sizeof(cdb_str)))); 3006 /* FALLTHROUGH */ 3007 } 3008 case XPT_TARGET_IO: 3009 case XPT_CONT_TARGET_IO: 3010 start_ccb->csio.sense_resid = 0; 3011 start_ccb->csio.resid = 0; 3012 /* FALLTHROUGH */ 3013 case XPT_RESET_DEV: 3014 case XPT_ENG_EXEC: 3015 { 3016 struct cam_path *path; 3017 struct cam_sim *sim; 3018 int runq; 3019 3020 path = start_ccb->ccb_h.path; 3021 3022 sim = path->bus->sim; 3023 if (sim == &cam_dead_sim) { 3024 /* The SIM has gone; just execute the CCB directly. */ 3025 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); 3026 (*(sim->sim_action))(sim, start_ccb); 3027 break; 3028 } 3029 3030 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 3031 if (path->device->qfrozen_cnt == 0) 3032 runq = xpt_schedule_dev_sendq(path->bus, path->device); 3033 else 3034 runq = 0; 3035 if (runq != 0) 3036 xpt_run_dev_sendq(path->bus); 3037 break; 3038 } 3039 case XPT_SET_TRAN_SETTINGS: 3040 { 3041 xpt_set_transfer_settings(&start_ccb->cts, 3042 start_ccb->ccb_h.path->device, 3043 /*async_update*/FALSE); 3044 break; 3045 } 3046 case XPT_CALC_GEOMETRY: 3047 { 3048 struct cam_sim *sim; 3049 3050 /* Filter out garbage */ 3051 if (start_ccb->ccg.block_size == 0 3052 || start_ccb->ccg.volume_size == 0) { 3053 start_ccb->ccg.cylinders = 0; 3054 start_ccb->ccg.heads = 0; 3055 start_ccb->ccg.secs_per_track = 0; 3056 start_ccb->ccb_h.status = CAM_REQ_CMP; 3057 break; 3058 } 3059 sim = start_ccb->ccb_h.path->bus->sim; 3060 (*(sim->sim_action))(sim, start_ccb); 3061 break; 3062 } 3063 case XPT_ABORT: 3064 { 3065 union ccb* abort_ccb; 3066 3067 abort_ccb = start_ccb->cab.abort_ccb; 3068 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 3069 3070 if (abort_ccb->ccb_h.pinfo.index >= 0) { 3071 struct cam_ccbq *ccbq; 3072 3073 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3074 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3075 abort_ccb->ccb_h.status = 3076 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3077 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3078 xpt_done(abort_ccb); 3079 start_ccb->ccb_h.status = CAM_REQ_CMP; 3080 break; 3081 } 3082 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3083 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3084 /* 3085 * We've caught this ccb en route to 3086 * the SIM. Flag it for abort and the 3087 * SIM will do so just before starting 3088 * real work on the CCB. 3089 */ 3090 abort_ccb->ccb_h.status = 3091 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3092 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3093 start_ccb->ccb_h.status = CAM_REQ_CMP; 3094 break; 3095 } 3096 } 3097 if (XPT_FC_IS_QUEUED(abort_ccb) 3098 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3099 /* 3100 * It's already completed but waiting 3101 * for our SWI to get to it. 3102 */ 3103 start_ccb->ccb_h.status = CAM_UA_ABORT; 3104 break; 3105 } 3106 /* 3107 * If we weren't able to take care of the abort request 3108 * in the XPT, pass the request down to the SIM for processing. 3109 */ 3110 /* FALLTHROUGH */ 3111 } 3112 case XPT_ACCEPT_TARGET_IO: 3113 case XPT_EN_LUN: 3114 case XPT_IMMED_NOTIFY: 3115 case XPT_NOTIFY_ACK: 3116 case XPT_GET_TRAN_SETTINGS: 3117 case XPT_RESET_BUS: 3118 { 3119 struct cam_sim *sim; 3120 3121 sim = start_ccb->ccb_h.path->bus->sim; 3122 (*(sim->sim_action))(sim, start_ccb); 3123 break; 3124 } 3125 case XPT_PATH_INQ: 3126 { 3127 struct cam_sim *sim; 3128 3129 sim = start_ccb->ccb_h.path->bus->sim; 3130 (*(sim->sim_action))(sim, start_ccb); 3131 break; 3132 } 3133 case XPT_PATH_STATS: 3134 start_ccb->cpis.last_reset = 3135 start_ccb->ccb_h.path->bus->last_reset; 3136 start_ccb->ccb_h.status = CAM_REQ_CMP; 3137 break; 3138 case XPT_GDEV_TYPE: 3139 { 3140 struct cam_ed *dev; 3141 3142 dev = start_ccb->ccb_h.path->device; 3143 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3144 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3145 } else { 3146 struct ccb_getdev *cgd; 3147 3148 cgd = &start_ccb->cgd; 3149 cgd->inq_data = dev->inq_data; 3150 cgd->ccb_h.status = CAM_REQ_CMP; 3151 cgd->serial_num_len = dev->serial_num_len; 3152 if ((dev->serial_num_len > 0) 3153 && (dev->serial_num != NULL)) 3154 bcopy(dev->serial_num, cgd->serial_num, 3155 dev->serial_num_len); 3156 } 3157 break; 3158 } 3159 case XPT_GDEV_STATS: 3160 { 3161 struct cam_ed *dev; 3162 3163 dev = start_ccb->ccb_h.path->device; 3164 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3165 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3166 } else { 3167 struct ccb_getdevstats *cgds; 3168 struct cam_eb *bus; 3169 struct cam_et *tar; 3170 3171 cgds = &start_ccb->cgds; 3172 bus = cgds->ccb_h.path->bus; 3173 tar = cgds->ccb_h.path->target; 3174 cgds->dev_openings = dev->ccbq.dev_openings; 3175 cgds->dev_active = dev->ccbq.dev_active; 3176 cgds->devq_openings = dev->ccbq.devq_openings; 3177 cgds->devq_queued = dev->ccbq.queue.entries; 3178 cgds->held = dev->ccbq.held; 3179 cgds->last_reset = tar->last_reset; 3180 cgds->maxtags = dev->quirk->maxtags; 3181 cgds->mintags = dev->quirk->mintags; 3182 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3183 cgds->last_reset = bus->last_reset; 3184 cgds->ccb_h.status = CAM_REQ_CMP; 3185 } 3186 break; 3187 } 3188 case XPT_GDEVLIST: 3189 { 3190 struct cam_periph *nperiph; 3191 struct periph_list *periph_head; 3192 struct ccb_getdevlist *cgdl; 3193 u_int i; 3194 struct cam_ed *device; 3195 int found; 3196 3197 3198 found = 0; 3199 3200 /* 3201 * Don't want anyone mucking with our data. 3202 */ 3203 device = start_ccb->ccb_h.path->device; 3204 periph_head = &device->periphs; 3205 cgdl = &start_ccb->cgdl; 3206 3207 /* 3208 * Check and see if the list has changed since the user 3209 * last requested a list member. If so, tell them that the 3210 * list has changed, and therefore they need to start over 3211 * from the beginning. 3212 */ 3213 if ((cgdl->index != 0) && 3214 (cgdl->generation != device->generation)) { 3215 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3216 break; 3217 } 3218 3219 /* 3220 * Traverse the list of peripherals and attempt to find 3221 * the requested peripheral. 3222 */ 3223 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3224 (nperiph != NULL) && (i <= cgdl->index); 3225 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3226 if (i == cgdl->index) { 3227 strncpy(cgdl->periph_name, 3228 nperiph->periph_name, 3229 DEV_IDLEN); 3230 cgdl->unit_number = nperiph->unit_number; 3231 found = 1; 3232 } 3233 } 3234 if (found == 0) { 3235 cgdl->status = CAM_GDEVLIST_ERROR; 3236 break; 3237 } 3238 3239 if (nperiph == NULL) 3240 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3241 else 3242 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3243 3244 cgdl->index++; 3245 cgdl->generation = device->generation; 3246 3247 cgdl->ccb_h.status = CAM_REQ_CMP; 3248 break; 3249 } 3250 case XPT_DEV_MATCH: 3251 { 3252 dev_pos_type position_type; 3253 struct ccb_dev_match *cdm; 3254 int ret; 3255 3256 cdm = &start_ccb->cdm; 3257 3258 /* 3259 * There are two ways of getting at information in the EDT. 3260 * The first way is via the primary EDT tree. It starts 3261 * with a list of busses, then a list of targets on a bus, 3262 * then devices/luns on a target, and then peripherals on a 3263 * device/lun. The "other" way is by the peripheral driver 3264 * lists. The peripheral driver lists are organized by 3265 * peripheral driver. (obviously) So it makes sense to 3266 * use the peripheral driver list if the user is looking 3267 * for something like "da1", or all "da" devices. If the 3268 * user is looking for something on a particular bus/target 3269 * or lun, it's generally better to go through the EDT tree. 3270 */ 3271 3272 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3273 position_type = cdm->pos.position_type; 3274 else { 3275 u_int i; 3276 3277 position_type = CAM_DEV_POS_NONE; 3278 3279 for (i = 0; i < cdm->num_patterns; i++) { 3280 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3281 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3282 position_type = CAM_DEV_POS_EDT; 3283 break; 3284 } 3285 } 3286 3287 if (cdm->num_patterns == 0) 3288 position_type = CAM_DEV_POS_EDT; 3289 else if (position_type == CAM_DEV_POS_NONE) 3290 position_type = CAM_DEV_POS_PDRV; 3291 } 3292 3293 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3294 case CAM_DEV_POS_EDT: 3295 ret = xptedtmatch(cdm); 3296 break; 3297 case CAM_DEV_POS_PDRV: 3298 ret = xptperiphlistmatch(cdm); 3299 break; 3300 default: 3301 cdm->status = CAM_DEV_MATCH_ERROR; 3302 break; 3303 } 3304 3305 if (cdm->status == CAM_DEV_MATCH_ERROR) 3306 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3307 else 3308 start_ccb->ccb_h.status = CAM_REQ_CMP; 3309 3310 break; 3311 } 3312 case XPT_SASYNC_CB: 3313 { 3314 struct ccb_setasync *csa; 3315 struct async_node *cur_entry; 3316 struct async_list *async_head; 3317 u_int32_t added; 3318 3319 csa = &start_ccb->csa; 3320 added = csa->event_enable; 3321 async_head = &csa->ccb_h.path->device->asyncs; 3322 3323 /* 3324 * If there is already an entry for us, simply 3325 * update it. 3326 */ 3327 cur_entry = SLIST_FIRST(async_head); 3328 while (cur_entry != NULL) { 3329 if ((cur_entry->callback_arg == csa->callback_arg) 3330 && (cur_entry->callback == csa->callback)) 3331 break; 3332 cur_entry = SLIST_NEXT(cur_entry, links); 3333 } 3334 3335 if (cur_entry != NULL) { 3336 /* 3337 * If the request has no flags set, 3338 * remove the entry. 3339 */ 3340 added &= ~cur_entry->event_enable; 3341 if (csa->event_enable == 0) { 3342 SLIST_REMOVE(async_head, cur_entry, 3343 async_node, links); 3344 csa->ccb_h.path->device->refcount--; 3345 kfree(cur_entry, M_CAMXPT); 3346 } else { 3347 cur_entry->event_enable = csa->event_enable; 3348 } 3349 } else { 3350 cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, 3351 M_INTWAIT); 3352 cur_entry->event_enable = csa->event_enable; 3353 cur_entry->callback_arg = csa->callback_arg; 3354 cur_entry->callback = csa->callback; 3355 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3356 csa->ccb_h.path->device->refcount++; 3357 } 3358 3359 /* 3360 * Need to decouple this operation via a taskqueue so that 3361 * the locking doesn't become a mess. 3362 */ 3363 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 3364 struct xpt_task *task; 3365 3366 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 3367 M_INTWAIT); 3368 3369 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 3370 task->data1 = cur_entry; 3371 task->data2 = added; 3372 taskqueue_enqueue(taskqueue_thread[mycpuid], 3373 &task->task); 3374 } 3375 3376 start_ccb->ccb_h.status = CAM_REQ_CMP; 3377 break; 3378 } 3379 case XPT_REL_SIMQ: 3380 { 3381 struct ccb_relsim *crs; 3382 struct cam_ed *dev; 3383 3384 crs = &start_ccb->crs; 3385 dev = crs->ccb_h.path->device; 3386 if (dev == NULL) { 3387 3388 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3389 break; 3390 } 3391 3392 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3393 3394 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 3395 /* Don't ever go below one opening */ 3396 if (crs->openings > 0) { 3397 xpt_dev_ccbq_resize(crs->ccb_h.path, 3398 crs->openings); 3399 3400 if (bootverbose) { 3401 xpt_print(crs->ccb_h.path, 3402 "tagged openings now %d\n", 3403 crs->openings); 3404 } 3405 } 3406 } 3407 } 3408 3409 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3410 3411 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3412 3413 /* 3414 * Just extend the old timeout and decrement 3415 * the freeze count so that a single timeout 3416 * is sufficient for releasing the queue. 3417 */ 3418 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3419 callout_stop(&dev->callout); 3420 } else { 3421 3422 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3423 } 3424 3425 callout_reset(&dev->callout, 3426 (crs->release_timeout * hz) / 1000, 3427 xpt_release_devq_timeout, dev); 3428 3429 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3430 3431 } 3432 3433 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3434 3435 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3436 /* 3437 * Decrement the freeze count so that a single 3438 * completion is still sufficient to unfreeze 3439 * the queue. 3440 */ 3441 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3442 } else { 3443 3444 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3445 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3446 } 3447 } 3448 3449 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3450 3451 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3452 || (dev->ccbq.dev_active == 0)) { 3453 3454 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3455 } else { 3456 3457 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3458 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3459 } 3460 } 3461 3462 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3463 3464 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3465 /*run_queue*/TRUE); 3466 } 3467 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3468 start_ccb->ccb_h.status = CAM_REQ_CMP; 3469 break; 3470 } 3471 case XPT_SCAN_BUS: 3472 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3473 break; 3474 case XPT_SCAN_LUN: 3475 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3476 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3477 start_ccb); 3478 break; 3479 case XPT_DEBUG: { 3480 #ifdef CAMDEBUG 3481 #ifdef CAM_DEBUG_DELAY 3482 cam_debug_delay = CAM_DEBUG_DELAY; 3483 #endif 3484 cam_dflags = start_ccb->cdbg.flags; 3485 if (cam_dpath != NULL) { 3486 xpt_free_path(cam_dpath); 3487 cam_dpath = NULL; 3488 } 3489 3490 if (cam_dflags != CAM_DEBUG_NONE) { 3491 if (xpt_create_path(&cam_dpath, xpt_periph, 3492 start_ccb->ccb_h.path_id, 3493 start_ccb->ccb_h.target_id, 3494 start_ccb->ccb_h.target_lun) != 3495 CAM_REQ_CMP) { 3496 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3497 cam_dflags = CAM_DEBUG_NONE; 3498 } else { 3499 start_ccb->ccb_h.status = CAM_REQ_CMP; 3500 xpt_print(cam_dpath, "debugging flags now %x\n", 3501 cam_dflags); 3502 } 3503 } else { 3504 cam_dpath = NULL; 3505 start_ccb->ccb_h.status = CAM_REQ_CMP; 3506 } 3507 #else /* !CAMDEBUG */ 3508 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3509 #endif /* CAMDEBUG */ 3510 break; 3511 } 3512 case XPT_NOOP: 3513 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3514 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3515 start_ccb->ccb_h.status = CAM_REQ_CMP; 3516 break; 3517 default: 3518 case XPT_SDEV_TYPE: 3519 case XPT_TERM_IO: 3520 case XPT_ENG_INQ: 3521 /* XXX Implement */ 3522 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3523 break; 3524 } 3525 } 3526 3527 void 3528 xpt_polled_action(union ccb *start_ccb) 3529 { 3530 u_int32_t timeout; 3531 struct cam_sim *sim; 3532 struct cam_devq *devq; 3533 struct cam_ed *dev; 3534 3535 timeout = start_ccb->ccb_h.timeout; 3536 sim = start_ccb->ccb_h.path->bus->sim; 3537 devq = sim->devq; 3538 dev = start_ccb->ccb_h.path->device; 3539 3540 sim_lock_assert_owned(sim->lock); 3541 3542 /* 3543 * Steal an opening so that no other queued requests 3544 * can get it before us while we simulate interrupts. 3545 */ 3546 dev->ccbq.devq_openings--; 3547 dev->ccbq.dev_openings--; 3548 3549 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3550 && (--timeout > 0)) { 3551 DELAY(1000); 3552 (*(sim->sim_poll))(sim); 3553 camisr_runqueue(sim); 3554 } 3555 3556 dev->ccbq.devq_openings++; 3557 dev->ccbq.dev_openings++; 3558 3559 if (timeout != 0) { 3560 xpt_action(start_ccb); 3561 while(--timeout > 0) { 3562 (*(sim->sim_poll))(sim); 3563 camisr_runqueue(sim); 3564 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3565 != CAM_REQ_INPROG) 3566 break; 3567 DELAY(1000); 3568 } 3569 if (timeout == 0) { 3570 /* 3571 * XXX Is it worth adding a sim_timeout entry 3572 * point so we can attempt recovery? If 3573 * this is only used for dumps, I don't think 3574 * it is. 3575 */ 3576 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3577 } 3578 } else { 3579 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3580 } 3581 } 3582 3583 /* 3584 * Schedule a peripheral driver to receive a ccb when it's 3585 * target device has space for more transactions. 3586 */ 3587 void 3588 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3589 { 3590 struct cam_ed *device; 3591 union ccb *work_ccb; 3592 int runq; 3593 3594 sim_lock_assert_owned(perph->sim->lock); 3595 3596 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3597 device = perph->path->device; 3598 if (periph_is_queued(perph)) { 3599 /* Simply reorder based on new priority */ 3600 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3601 (" change priority to %d\n", new_priority)); 3602 if (new_priority < perph->pinfo.priority) { 3603 camq_change_priority(&device->drvq, 3604 perph->pinfo.index, 3605 new_priority); 3606 } 3607 runq = 0; 3608 } else if (perph->path->bus->sim == &cam_dead_sim) { 3609 /* The SIM is gone so just call periph_start directly. */ 3610 work_ccb = xpt_get_ccb(perph->path->device); 3611 if (work_ccb == NULL) 3612 return; /* XXX */ 3613 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); 3614 perph->pinfo.priority = new_priority; 3615 perph->periph_start(perph, work_ccb); 3616 return; 3617 } else { 3618 /* New entry on the queue */ 3619 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3620 (" added periph to queue\n")); 3621 perph->pinfo.priority = new_priority; 3622 perph->pinfo.generation = ++device->drvq.generation; 3623 camq_insert(&device->drvq, &perph->pinfo); 3624 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3625 } 3626 if (runq != 0) { 3627 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3628 (" calling xpt_run_devq\n")); 3629 xpt_run_dev_allocq(perph->path->bus); 3630 } 3631 } 3632 3633 3634 /* 3635 * Schedule a device to run on a given queue. 3636 * If the device was inserted as a new entry on the queue, 3637 * return 1 meaning the device queue should be run. If we 3638 * were already queued, implying someone else has already 3639 * started the queue, return 0 so the caller doesn't attempt 3640 * to run the queue. 3641 */ 3642 static int 3643 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3644 u_int32_t new_priority) 3645 { 3646 int retval; 3647 u_int32_t old_priority; 3648 3649 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3650 3651 old_priority = pinfo->priority; 3652 3653 /* 3654 * Are we already queued? 3655 */ 3656 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3657 /* Simply reorder based on new priority */ 3658 if (new_priority < old_priority) { 3659 camq_change_priority(queue, pinfo->index, 3660 new_priority); 3661 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3662 ("changed priority to %d\n", 3663 new_priority)); 3664 } 3665 retval = 0; 3666 } else { 3667 /* New entry on the queue */ 3668 if (new_priority < old_priority) 3669 pinfo->priority = new_priority; 3670 3671 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3672 ("Inserting onto queue\n")); 3673 pinfo->generation = ++queue->generation; 3674 camq_insert(queue, pinfo); 3675 retval = 1; 3676 } 3677 return (retval); 3678 } 3679 3680 static void 3681 xpt_run_dev_allocq(struct cam_eb *bus) 3682 { 3683 struct cam_devq *devq; 3684 3685 if ((devq = bus->sim->devq) == NULL) { 3686 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3687 return; 3688 } 3689 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3690 3691 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3692 (" qfrozen_cnt == 0x%x, entries == %d, " 3693 "openings == %d, active == %d\n", 3694 devq->alloc_queue.qfrozen_cnt, 3695 devq->alloc_queue.entries, 3696 devq->alloc_openings, 3697 devq->alloc_active)); 3698 3699 devq->alloc_queue.qfrozen_cnt++; 3700 while ((devq->alloc_queue.entries > 0) 3701 && (devq->alloc_openings > 0) 3702 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3703 struct cam_ed_qinfo *qinfo; 3704 struct cam_ed *device; 3705 union ccb *work_ccb; 3706 struct cam_periph *drv; 3707 struct camq *drvq; 3708 3709 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3710 CAMQ_HEAD); 3711 device = qinfo->device; 3712 3713 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3714 ("running device %p\n", device)); 3715 3716 drvq = &device->drvq; 3717 3718 #ifdef CAMDEBUG 3719 if (drvq->entries <= 0) { 3720 panic("xpt_run_dev_allocq: " 3721 "Device on queue without any work to do"); 3722 } 3723 #endif 3724 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3725 devq->alloc_openings--; 3726 devq->alloc_active++; 3727 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3728 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3729 drv->pinfo.priority); 3730 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3731 ("calling periph start\n")); 3732 drv->periph_start(drv, work_ccb); 3733 } else { 3734 /* 3735 * Malloc failure in alloc_ccb 3736 */ 3737 /* 3738 * XXX add us to a list to be run from free_ccb 3739 * if we don't have any ccbs active on this 3740 * device queue otherwise we may never get run 3741 * again. 3742 */ 3743 break; 3744 } 3745 3746 if (drvq->entries > 0) { 3747 /* We have more work. Attempt to reschedule */ 3748 xpt_schedule_dev_allocq(bus, device); 3749 } 3750 } 3751 devq->alloc_queue.qfrozen_cnt--; 3752 } 3753 3754 static void 3755 xpt_run_dev_sendq(struct cam_eb *bus) 3756 { 3757 struct cam_devq *devq; 3758 3759 if ((devq = bus->sim->devq) == NULL) { 3760 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3761 return; 3762 } 3763 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3764 3765 devq->send_queue.qfrozen_cnt++; 3766 while ((devq->send_queue.entries > 0) 3767 && (devq->send_openings > 0)) { 3768 struct cam_ed_qinfo *qinfo; 3769 struct cam_ed *device; 3770 union ccb *work_ccb; 3771 struct cam_sim *sim; 3772 3773 if (devq->send_queue.qfrozen_cnt > 1) { 3774 break; 3775 } 3776 3777 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3778 CAMQ_HEAD); 3779 device = qinfo->device; 3780 3781 /* 3782 * If the device has been "frozen", don't attempt 3783 * to run it. 3784 */ 3785 if (device->qfrozen_cnt > 0) { 3786 continue; 3787 } 3788 3789 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3790 ("running device %p\n", device)); 3791 3792 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3793 if (work_ccb == NULL) { 3794 kprintf("device on run queue with no ccbs???\n"); 3795 continue; 3796 } 3797 3798 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3799 3800 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 3801 if (xsoftc.num_highpower <= 0) { 3802 /* 3803 * We got a high power command, but we 3804 * don't have any available slots. Freeze 3805 * the device queue until we have a slot 3806 * available. 3807 */ 3808 device->qfrozen_cnt++; 3809 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3810 &work_ccb->ccb_h, 3811 xpt_links.stqe); 3812 3813 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3814 continue; 3815 } else { 3816 /* 3817 * Consume a high power slot while 3818 * this ccb runs. 3819 */ 3820 xsoftc.num_highpower--; 3821 } 3822 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3823 } 3824 devq->active_dev = device; 3825 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3826 3827 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3828 3829 devq->send_openings--; 3830 devq->send_active++; 3831 3832 if (device->ccbq.queue.entries > 0) 3833 xpt_schedule_dev_sendq(bus, device); 3834 3835 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3836 /* 3837 * The client wants to freeze the queue 3838 * after this CCB is sent. 3839 */ 3840 device->qfrozen_cnt++; 3841 } 3842 3843 /* In Target mode, the peripheral driver knows best... */ 3844 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3845 if ((device->inq_flags & SID_CmdQue) != 0 3846 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3847 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3848 else 3849 /* 3850 * Clear this in case of a retried CCB that 3851 * failed due to a rejected tag. 3852 */ 3853 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3854 } 3855 3856 /* 3857 * Device queues can be shared among multiple sim instances 3858 * that reside on different busses. Use the SIM in the queue 3859 * CCB's path, rather than the one in the bus that was passed 3860 * into this function. 3861 */ 3862 sim = work_ccb->ccb_h.path->bus->sim; 3863 (*(sim->sim_action))(sim, work_ccb); 3864 3865 devq->active_dev = NULL; 3866 } 3867 devq->send_queue.qfrozen_cnt--; 3868 } 3869 3870 /* 3871 * This function merges stuff from the slave ccb into the master ccb, while 3872 * keeping important fields in the master ccb constant. 3873 */ 3874 void 3875 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3876 { 3877 /* 3878 * Pull fields that are valid for peripheral drivers to set 3879 * into the master CCB along with the CCB "payload". 3880 */ 3881 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3882 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3883 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3884 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3885 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3886 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3887 } 3888 3889 void 3890 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3891 { 3892 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3893 callout_init(&ccb_h->timeout_ch); 3894 ccb_h->pinfo.priority = priority; 3895 ccb_h->path = path; 3896 ccb_h->path_id = path->bus->path_id; 3897 if (path->target) 3898 ccb_h->target_id = path->target->target_id; 3899 else 3900 ccb_h->target_id = CAM_TARGET_WILDCARD; 3901 if (path->device) { 3902 ccb_h->target_lun = path->device->lun_id; 3903 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3904 } else { 3905 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3906 } 3907 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3908 ccb_h->flags = 0; 3909 } 3910 3911 /* Path manipulation functions */ 3912 cam_status 3913 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3914 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3915 { 3916 struct cam_path *path; 3917 cam_status status; 3918 3919 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); 3920 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3921 if (status != CAM_REQ_CMP) { 3922 kfree(path, M_CAMXPT); 3923 path = NULL; 3924 } 3925 *new_path_ptr = path; 3926 return (status); 3927 } 3928 3929 cam_status 3930 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3931 struct cam_periph *periph, path_id_t path_id, 3932 target_id_t target_id, lun_id_t lun_id) 3933 { 3934 struct cam_path *path; 3935 struct cam_eb *bus = NULL; 3936 cam_status status; 3937 int need_unlock = 0; 3938 3939 path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3940 3941 if (path_id != CAM_BUS_WILDCARD) { 3942 bus = xpt_find_bus(path_id); 3943 if (bus != NULL) { 3944 need_unlock = 1; 3945 CAM_SIM_LOCK(bus->sim); 3946 } 3947 } 3948 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3949 if (need_unlock) 3950 CAM_SIM_UNLOCK(bus->sim); 3951 if (status != CAM_REQ_CMP) { 3952 kfree(path, M_CAMXPT); 3953 path = NULL; 3954 } 3955 *new_path_ptr = path; 3956 return (status); 3957 } 3958 3959 static cam_status 3960 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3961 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3962 { 3963 struct cam_eb *bus; 3964 struct cam_et *target; 3965 struct cam_ed *device; 3966 cam_status status; 3967 3968 status = CAM_REQ_CMP; /* Completed without error */ 3969 target = NULL; /* Wildcarded */ 3970 device = NULL; /* Wildcarded */ 3971 3972 /* 3973 * We will potentially modify the EDT, so block interrupts 3974 * that may attempt to create cam paths. 3975 */ 3976 bus = xpt_find_bus(path_id); 3977 if (bus == NULL) { 3978 status = CAM_PATH_INVALID; 3979 } else { 3980 target = xpt_find_target(bus, target_id); 3981 if (target == NULL) { 3982 /* Create one */ 3983 struct cam_et *new_target; 3984 3985 new_target = xpt_alloc_target(bus, target_id); 3986 if (new_target == NULL) { 3987 status = CAM_RESRC_UNAVAIL; 3988 } else { 3989 target = new_target; 3990 } 3991 } 3992 if (target != NULL) { 3993 device = xpt_find_device(target, lun_id); 3994 if (device == NULL) { 3995 /* Create one */ 3996 struct cam_ed *new_device; 3997 3998 new_device = xpt_alloc_device(bus, 3999 target, 4000 lun_id); 4001 if (new_device == NULL) { 4002 status = CAM_RESRC_UNAVAIL; 4003 } else { 4004 device = new_device; 4005 } 4006 } 4007 } 4008 } 4009 4010 /* 4011 * Only touch the user's data if we are successful. 4012 */ 4013 if (status == CAM_REQ_CMP) { 4014 new_path->periph = perph; 4015 new_path->bus = bus; 4016 new_path->target = target; 4017 new_path->device = device; 4018 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 4019 } else { 4020 if (device != NULL) 4021 xpt_release_device(bus, target, device); 4022 if (target != NULL) 4023 xpt_release_target(bus, target); 4024 if (bus != NULL) 4025 xpt_release_bus(bus); 4026 } 4027 return (status); 4028 } 4029 4030 static void 4031 xpt_release_path(struct cam_path *path) 4032 { 4033 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 4034 if (path->device != NULL) { 4035 xpt_release_device(path->bus, path->target, path->device); 4036 path->device = NULL; 4037 } 4038 if (path->target != NULL) { 4039 xpt_release_target(path->bus, path->target); 4040 path->target = NULL; 4041 } 4042 if (path->bus != NULL) { 4043 xpt_release_bus(path->bus); 4044 path->bus = NULL; 4045 } 4046 } 4047 4048 void 4049 xpt_free_path(struct cam_path *path) 4050 { 4051 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 4052 xpt_release_path(path); 4053 kfree(path, M_CAMXPT); 4054 } 4055 4056 4057 /* 4058 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 4059 * in path1, 2 for match with wildcards in path2. 4060 */ 4061 int 4062 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 4063 { 4064 int retval = 0; 4065 4066 if (path1->bus != path2->bus) { 4067 if (path1->bus->path_id == CAM_BUS_WILDCARD) 4068 retval = 1; 4069 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 4070 retval = 2; 4071 else 4072 return (-1); 4073 } 4074 if (path1->target != path2->target) { 4075 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 4076 if (retval == 0) 4077 retval = 1; 4078 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 4079 retval = 2; 4080 else 4081 return (-1); 4082 } 4083 if (path1->device != path2->device) { 4084 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4085 if (retval == 0) 4086 retval = 1; 4087 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4088 retval = 2; 4089 else 4090 return (-1); 4091 } 4092 return (retval); 4093 } 4094 4095 void 4096 xpt_print_path(struct cam_path *path) 4097 { 4098 4099 if (path == NULL) 4100 kprintf("(nopath): "); 4101 else { 4102 if (path->periph != NULL) 4103 kprintf("(%s%d:", path->periph->periph_name, 4104 path->periph->unit_number); 4105 else 4106 kprintf("(noperiph:"); 4107 4108 if (path->bus != NULL) 4109 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4110 path->bus->sim->unit_number, 4111 path->bus->sim->bus_id); 4112 else 4113 kprintf("nobus:"); 4114 4115 if (path->target != NULL) 4116 kprintf("%d:", path->target->target_id); 4117 else 4118 kprintf("X:"); 4119 4120 if (path->device != NULL) 4121 kprintf("%d): ", path->device->lun_id); 4122 else 4123 kprintf("X): "); 4124 } 4125 } 4126 4127 void 4128 xpt_print(struct cam_path *path, const char *fmt, ...) 4129 { 4130 __va_list ap; 4131 xpt_print_path(path); 4132 __va_start(ap, fmt); 4133 kvprintf(fmt, ap); 4134 __va_end(ap); 4135 } 4136 4137 int 4138 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4139 { 4140 struct sbuf sb; 4141 4142 sim_lock_assert_owned(path->bus->sim->lock); 4143 4144 sbuf_new(&sb, str, str_len, 0); 4145 4146 if (path == NULL) 4147 sbuf_printf(&sb, "(nopath): "); 4148 else { 4149 if (path->periph != NULL) 4150 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4151 path->periph->unit_number); 4152 else 4153 sbuf_printf(&sb, "(noperiph:"); 4154 4155 if (path->bus != NULL) 4156 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4157 path->bus->sim->unit_number, 4158 path->bus->sim->bus_id); 4159 else 4160 sbuf_printf(&sb, "nobus:"); 4161 4162 if (path->target != NULL) 4163 sbuf_printf(&sb, "%d:", path->target->target_id); 4164 else 4165 sbuf_printf(&sb, "X:"); 4166 4167 if (path->device != NULL) 4168 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4169 else 4170 sbuf_printf(&sb, "X): "); 4171 } 4172 sbuf_finish(&sb); 4173 4174 return(sbuf_len(&sb)); 4175 } 4176 4177 path_id_t 4178 xpt_path_path_id(struct cam_path *path) 4179 { 4180 sim_lock_assert_owned(path->bus->sim->lock); 4181 4182 return(path->bus->path_id); 4183 } 4184 4185 target_id_t 4186 xpt_path_target_id(struct cam_path *path) 4187 { 4188 sim_lock_assert_owned(path->bus->sim->lock); 4189 4190 if (path->target != NULL) 4191 return (path->target->target_id); 4192 else 4193 return (CAM_TARGET_WILDCARD); 4194 } 4195 4196 lun_id_t 4197 xpt_path_lun_id(struct cam_path *path) 4198 { 4199 sim_lock_assert_owned(path->bus->sim->lock); 4200 4201 if (path->device != NULL) 4202 return (path->device->lun_id); 4203 else 4204 return (CAM_LUN_WILDCARD); 4205 } 4206 4207 struct cam_sim * 4208 xpt_path_sim(struct cam_path *path) 4209 { 4210 return (path->bus->sim); 4211 } 4212 4213 struct cam_periph* 4214 xpt_path_periph(struct cam_path *path) 4215 { 4216 sim_lock_assert_owned(path->bus->sim->lock); 4217 4218 return (path->periph); 4219 } 4220 4221 char * 4222 xpt_path_serialno(struct cam_path *path) 4223 { 4224 return (path->device->serial_num); 4225 } 4226 4227 /* 4228 * Release a CAM control block for the caller. Remit the cost of the structure 4229 * to the device referenced by the path. If the this device had no 'credits' 4230 * and peripheral drivers have registered async callbacks for this notification 4231 * call them now. 4232 */ 4233 void 4234 xpt_release_ccb(union ccb *free_ccb) 4235 { 4236 struct cam_path *path; 4237 struct cam_ed *device; 4238 struct cam_eb *bus; 4239 struct cam_sim *sim; 4240 4241 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4242 path = free_ccb->ccb_h.path; 4243 device = path->device; 4244 bus = path->bus; 4245 sim = bus->sim; 4246 4247 sim_lock_assert_owned(sim->lock); 4248 4249 cam_ccbq_release_opening(&device->ccbq); 4250 if (sim->ccb_count > sim->max_ccbs) { 4251 xpt_free_ccb(free_ccb); 4252 sim->ccb_count--; 4253 } else if (sim == &cam_dead_sim) { 4254 xpt_free_ccb(free_ccb); 4255 } else { 4256 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 4257 xpt_links.sle); 4258 } 4259 if (sim->devq == NULL) { 4260 return; 4261 } 4262 sim->devq->alloc_openings++; 4263 sim->devq->alloc_active--; 4264 /* XXX Turn this into an inline function - xpt_run_device?? */ 4265 if ((device_is_alloc_queued(device) == 0) 4266 && (device->drvq.entries > 0)) { 4267 xpt_schedule_dev_allocq(bus, device); 4268 } 4269 if (dev_allocq_is_runnable(sim->devq)) 4270 xpt_run_dev_allocq(bus); 4271 } 4272 4273 /* Functions accessed by SIM drivers */ 4274 4275 /* 4276 * A sim structure, listing the SIM entry points and instance 4277 * identification info is passed to xpt_bus_register to hook the SIM 4278 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4279 * for this new bus and places it in the array of busses and assigns 4280 * it a path_id. The path_id may be influenced by "hard wiring" 4281 * information specified by the user. Once interrupt services are 4282 * availible, the bus will be probed. 4283 */ 4284 int32_t 4285 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4286 { 4287 struct cam_eb *new_bus; 4288 struct cam_eb *old_bus; 4289 struct ccb_pathinq cpi; 4290 4291 sim_lock_assert_owned(sim->lock); 4292 4293 sim->bus_id = bus; 4294 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); 4295 4296 if (strcmp(sim->sim_name, "xpt") != 0) { 4297 sim->path_id = 4298 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4299 } 4300 4301 TAILQ_INIT(&new_bus->et_entries); 4302 new_bus->path_id = sim->path_id; 4303 new_bus->sim = sim; 4304 ++sim->refcount; 4305 timevalclear(&new_bus->last_reset); 4306 new_bus->flags = 0; 4307 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4308 new_bus->generation = 0; 4309 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4310 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4311 while (old_bus != NULL 4312 && old_bus->path_id < new_bus->path_id) 4313 old_bus = TAILQ_NEXT(old_bus, links); 4314 if (old_bus != NULL) 4315 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4316 else 4317 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4318 xsoftc.bus_generation++; 4319 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4320 4321 /* Notify interested parties */ 4322 if (sim->path_id != CAM_XPT_PATH_ID) { 4323 struct cam_path path; 4324 4325 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4326 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4327 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4328 cpi.ccb_h.func_code = XPT_PATH_INQ; 4329 xpt_action((union ccb *)&cpi); 4330 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4331 xpt_release_path(&path); 4332 } 4333 return (CAM_SUCCESS); 4334 } 4335 4336 /* 4337 * Deregister a bus. We must clean out all transactions pending on the bus. 4338 * This routine is typically called prior to cam_sim_free() (e.g. see 4339 * dev/usbmisc/umass/umass.c) 4340 */ 4341 int32_t 4342 xpt_bus_deregister(path_id_t pathid) 4343 { 4344 struct cam_path bus_path; 4345 struct cam_et *target; 4346 struct cam_ed *device; 4347 struct cam_ed_qinfo *qinfo; 4348 struct cam_devq *devq; 4349 struct cam_periph *periph; 4350 struct cam_sim *ccbsim; 4351 union ccb *work_ccb; 4352 cam_status status; 4353 int retries = 0; 4354 4355 status = xpt_compile_path(&bus_path, NULL, pathid, 4356 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4357 if (status != CAM_REQ_CMP) 4358 return (status); 4359 4360 /* 4361 * This should clear out all pending requests and timeouts, but 4362 * the ccb's may be queued to a software interrupt. 4363 * 4364 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4365 * and it really ought to. 4366 */ 4367 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4368 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4369 4370 /* 4371 * Mark the SIM as having been deregistered. This prevents 4372 * certain operations from re-queueing to it, stops new devices 4373 * from being added, etc. 4374 */ 4375 devq = bus_path.bus->sim->devq; 4376 ccbsim = bus_path.bus->sim; 4377 ccbsim->flags |= CAM_SIM_DEREGISTERED; 4378 4379 again: 4380 /* 4381 * Execute any pending operations now. 4382 */ 4383 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 4384 CAMQ_HEAD)) != NULL || 4385 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 4386 CAMQ_HEAD)) != NULL) { 4387 do { 4388 device = qinfo->device; 4389 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 4390 if (work_ccb != NULL) { 4391 devq->active_dev = device; 4392 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 4393 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 4394 (*(ccbsim->sim_action))(ccbsim, work_ccb); 4395 } 4396 4397 periph = (struct cam_periph *)camq_remove(&device->drvq, 4398 CAMQ_HEAD); 4399 if (periph != NULL) 4400 xpt_schedule(periph, periph->pinfo.priority); 4401 } while (work_ccb != NULL || periph != NULL); 4402 } 4403 4404 /* 4405 * Make sure all completed CCBs are processed. 4406 */ 4407 while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { 4408 camisr_runqueue(ccbsim); 4409 } 4410 4411 /* 4412 * Check for requeues, reissues asyncs if necessary 4413 */ 4414 if (CAMQ_GET_HEAD(&devq->send_queue)) 4415 kprintf("camq: devq send_queue still in use (%d entries)\n", 4416 devq->send_queue.entries); 4417 if (CAMQ_GET_HEAD(&devq->alloc_queue)) 4418 kprintf("camq: devq alloc_queue still in use (%d entries)\n", 4419 devq->alloc_queue.entries); 4420 if (CAMQ_GET_HEAD(&devq->send_queue) || 4421 CAMQ_GET_HEAD(&devq->alloc_queue)) { 4422 if (++retries < 5) { 4423 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4424 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4425 goto again; 4426 } 4427 } 4428 4429 /* 4430 * Retarget the bus and all cached sim pointers to dead_sim. 4431 * 4432 * Various CAM subsystems may be holding on to targets, devices, 4433 * and/or peripherals and may attempt to use the sim pointer cached 4434 * in some of these structures during close. 4435 */ 4436 bus_path.bus->sim = &cam_dead_sim; 4437 TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { 4438 TAILQ_FOREACH(device, &target->ed_entries, links) { 4439 device->sim = &cam_dead_sim; 4440 SLIST_FOREACH(periph, &device->periphs, periph_links) { 4441 periph->sim = &cam_dead_sim; 4442 } 4443 } 4444 } 4445 4446 /* 4447 * Repeat the async's for the benefit of any new devices, such as 4448 * might be created from completed probes. Any new device 4449 * ops will run on dead_sim. 4450 * 4451 * XXX There are probably races :-( 4452 */ 4453 CAM_SIM_LOCK(&cam_dead_sim); 4454 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4455 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4456 CAM_SIM_UNLOCK(&cam_dead_sim); 4457 4458 /* Release the reference count held while registered. */ 4459 xpt_release_bus(bus_path.bus); 4460 xpt_release_path(&bus_path); 4461 4462 /* Release the ref we got when the bus was registered */ 4463 cam_sim_release(ccbsim, 0); 4464 4465 return (CAM_REQ_CMP); 4466 } 4467 4468 static path_id_t 4469 xptnextfreepathid(void) 4470 { 4471 struct cam_eb *bus; 4472 path_id_t pathid; 4473 const char *strval; 4474 4475 pathid = 0; 4476 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4477 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4478 retry: 4479 /* Find an unoccupied pathid */ 4480 while (bus != NULL && bus->path_id <= pathid) { 4481 if (bus->path_id == pathid) 4482 pathid++; 4483 bus = TAILQ_NEXT(bus, links); 4484 } 4485 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4486 4487 /* 4488 * Ensure that this pathid is not reserved for 4489 * a bus that may be registered in the future. 4490 */ 4491 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4492 ++pathid; 4493 /* Start the search over */ 4494 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4495 goto retry; 4496 } 4497 return (pathid); 4498 } 4499 4500 static path_id_t 4501 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4502 { 4503 path_id_t pathid; 4504 int i, dunit, val; 4505 char buf[32]; 4506 4507 pathid = CAM_XPT_PATH_ID; 4508 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4509 i = -1; 4510 while ((i = resource_query_string(i, "at", buf)) != -1) { 4511 if (strcmp(resource_query_name(i), "scbus")) { 4512 /* Avoid a bit of foot shooting. */ 4513 continue; 4514 } 4515 dunit = resource_query_unit(i); 4516 if (dunit < 0) /* unwired?! */ 4517 continue; 4518 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4519 if (sim_bus == val) { 4520 pathid = dunit; 4521 break; 4522 } 4523 } else if (sim_bus == 0) { 4524 /* Unspecified matches bus 0 */ 4525 pathid = dunit; 4526 break; 4527 } else { 4528 kprintf("Ambiguous scbus configuration for %s%d " 4529 "bus %d, cannot wire down. The kernel " 4530 "config entry for scbus%d should " 4531 "specify a controller bus.\n" 4532 "Scbus will be assigned dynamically.\n", 4533 sim_name, sim_unit, sim_bus, dunit); 4534 break; 4535 } 4536 } 4537 4538 if (pathid == CAM_XPT_PATH_ID) 4539 pathid = xptnextfreepathid(); 4540 return (pathid); 4541 } 4542 4543 void 4544 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4545 { 4546 struct cam_eb *bus; 4547 struct cam_et *target, *next_target; 4548 struct cam_ed *device, *next_device; 4549 4550 sim_lock_assert_owned(path->bus->sim->lock); 4551 4552 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4553 4554 /* 4555 * Most async events come from a CAM interrupt context. In 4556 * a few cases, the error recovery code at the peripheral layer, 4557 * which may run from our SWI or a process context, may signal 4558 * deferred events with a call to xpt_async. 4559 */ 4560 4561 bus = path->bus; 4562 4563 if (async_code == AC_BUS_RESET) { 4564 /* Update our notion of when the last reset occurred */ 4565 microuptime(&bus->last_reset); 4566 } 4567 4568 for (target = TAILQ_FIRST(&bus->et_entries); 4569 target != NULL; 4570 target = next_target) { 4571 4572 next_target = TAILQ_NEXT(target, links); 4573 4574 if (path->target != target 4575 && path->target->target_id != CAM_TARGET_WILDCARD 4576 && target->target_id != CAM_TARGET_WILDCARD) 4577 continue; 4578 4579 if (async_code == AC_SENT_BDR) { 4580 /* Update our notion of when the last reset occurred */ 4581 microuptime(&path->target->last_reset); 4582 } 4583 4584 for (device = TAILQ_FIRST(&target->ed_entries); 4585 device != NULL; 4586 device = next_device) { 4587 4588 next_device = TAILQ_NEXT(device, links); 4589 4590 if (path->device != device 4591 && path->device->lun_id != CAM_LUN_WILDCARD 4592 && device->lun_id != CAM_LUN_WILDCARD) 4593 continue; 4594 4595 xpt_dev_async(async_code, bus, target, 4596 device, async_arg); 4597 4598 xpt_async_bcast(&device->asyncs, async_code, 4599 path, async_arg); 4600 } 4601 } 4602 4603 /* 4604 * If this wasn't a fully wildcarded async, tell all 4605 * clients that want all async events. 4606 */ 4607 if (bus != xpt_periph->path->bus) 4608 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4609 path, async_arg); 4610 } 4611 4612 static void 4613 xpt_async_bcast(struct async_list *async_head, 4614 u_int32_t async_code, 4615 struct cam_path *path, void *async_arg) 4616 { 4617 struct async_node *cur_entry; 4618 4619 cur_entry = SLIST_FIRST(async_head); 4620 while (cur_entry != NULL) { 4621 struct async_node *next_entry; 4622 /* 4623 * Grab the next list entry before we call the current 4624 * entry's callback. This is because the callback function 4625 * can delete its async callback entry. 4626 */ 4627 next_entry = SLIST_NEXT(cur_entry, links); 4628 if ((cur_entry->event_enable & async_code) != 0) 4629 cur_entry->callback(cur_entry->callback_arg, 4630 async_code, path, 4631 async_arg); 4632 cur_entry = next_entry; 4633 } 4634 } 4635 4636 /* 4637 * Handle any per-device event notifications that require action by the XPT. 4638 */ 4639 static void 4640 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4641 struct cam_ed *device, void *async_arg) 4642 { 4643 cam_status status; 4644 struct cam_path newpath; 4645 4646 /* 4647 * We only need to handle events for real devices. 4648 */ 4649 if (target->target_id == CAM_TARGET_WILDCARD 4650 || device->lun_id == CAM_LUN_WILDCARD) 4651 return; 4652 4653 /* 4654 * We need our own path with wildcards expanded to 4655 * handle certain types of events. 4656 */ 4657 if ((async_code == AC_SENT_BDR) 4658 || (async_code == AC_BUS_RESET) 4659 || (async_code == AC_INQ_CHANGED)) 4660 status = xpt_compile_path(&newpath, NULL, 4661 bus->path_id, 4662 target->target_id, 4663 device->lun_id); 4664 else 4665 status = CAM_REQ_CMP_ERR; 4666 4667 if (status == CAM_REQ_CMP) { 4668 4669 /* 4670 * Allow transfer negotiation to occur in a 4671 * tag free environment. 4672 */ 4673 if (async_code == AC_SENT_BDR 4674 || async_code == AC_BUS_RESET) 4675 xpt_toggle_tags(&newpath); 4676 4677 if (async_code == AC_INQ_CHANGED) { 4678 /* 4679 * We've sent a start unit command, or 4680 * something similar to a device that 4681 * may have caused its inquiry data to 4682 * change. So we re-scan the device to 4683 * refresh the inquiry data for it. 4684 */ 4685 xpt_scan_lun(newpath.periph, &newpath, 4686 CAM_EXPECT_INQ_CHANGE, NULL); 4687 } 4688 xpt_release_path(&newpath); 4689 } else if (async_code == AC_LOST_DEVICE) { 4690 /* 4691 * When we lose a device the device may be about to detach 4692 * the sim, we have to clear out all pending timeouts and 4693 * requests before that happens. 4694 * 4695 * This typically happens most often with USB/UMASS devices. 4696 * 4697 * XXX it would be nice if we could abort the requests 4698 * pertaining to the device. 4699 */ 4700 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4701 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4702 device->flags |= CAM_DEV_UNCONFIGURED; 4703 xpt_release_device(bus, target, device); 4704 } 4705 } else if (async_code == AC_TRANSFER_NEG) { 4706 struct ccb_trans_settings *settings; 4707 4708 settings = (struct ccb_trans_settings *)async_arg; 4709 xpt_set_transfer_settings(settings, device, 4710 /*async_update*/TRUE); 4711 } 4712 } 4713 4714 u_int32_t 4715 xpt_freeze_devq(struct cam_path *path, u_int count) 4716 { 4717 struct ccb_hdr *ccbh; 4718 4719 sim_lock_assert_owned(path->bus->sim->lock); 4720 4721 path->device->qfrozen_cnt += count; 4722 4723 /* 4724 * Mark the last CCB in the queue as needing 4725 * to be requeued if the driver hasn't 4726 * changed it's state yet. This fixes a race 4727 * where a ccb is just about to be queued to 4728 * a controller driver when it's interrupt routine 4729 * freezes the queue. To completly close the 4730 * hole, controller drives must check to see 4731 * if a ccb's status is still CAM_REQ_INPROG 4732 * just before they queue 4733 * the CCB. See ahc_action/ahc_freeze_devq for 4734 * an example. 4735 */ 4736 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4737 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4738 ccbh->status = CAM_REQUEUE_REQ; 4739 return (path->device->qfrozen_cnt); 4740 } 4741 4742 u_int32_t 4743 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4744 { 4745 sim_lock_assert_owned(sim->lock); 4746 4747 if (sim->devq == NULL) 4748 return(count); 4749 sim->devq->send_queue.qfrozen_cnt += count; 4750 if (sim->devq->active_dev != NULL) { 4751 struct ccb_hdr *ccbh; 4752 4753 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4754 ccb_hdr_tailq); 4755 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4756 ccbh->status = CAM_REQUEUE_REQ; 4757 } 4758 return (sim->devq->send_queue.qfrozen_cnt); 4759 } 4760 4761 /* 4762 * Release the device queue after a timeout has expired, typically used to 4763 * introduce a delay before retrying after an I/O error or other problem. 4764 */ 4765 static void 4766 xpt_release_devq_timeout(void *arg) 4767 { 4768 struct cam_ed *device; 4769 4770 device = (struct cam_ed *)arg; 4771 CAM_SIM_LOCK(device->sim); 4772 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4773 CAM_SIM_UNLOCK(device->sim); 4774 } 4775 4776 void 4777 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4778 { 4779 sim_lock_assert_owned(path->bus->sim->lock); 4780 4781 xpt_release_devq_device(path->device, count, run_queue); 4782 } 4783 4784 static void 4785 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4786 { 4787 int rundevq; 4788 4789 rundevq = 0; 4790 4791 if (dev->qfrozen_cnt > 0) { 4792 4793 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4794 dev->qfrozen_cnt -= count; 4795 if (dev->qfrozen_cnt == 0) { 4796 4797 /* 4798 * No longer need to wait for a successful 4799 * command completion. 4800 */ 4801 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4802 4803 /* 4804 * Remove any timeouts that might be scheduled 4805 * to release this queue. 4806 */ 4807 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4808 callout_stop(&dev->callout); 4809 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4810 } 4811 4812 /* 4813 * Now that we are unfrozen schedule the 4814 * device so any pending transactions are 4815 * run. 4816 */ 4817 if ((dev->ccbq.queue.entries > 0) 4818 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4819 && (run_queue != 0)) { 4820 rundevq = 1; 4821 } 4822 } 4823 } 4824 if (rundevq != 0) 4825 xpt_run_dev_sendq(dev->target->bus); 4826 } 4827 4828 void 4829 xpt_release_simq(struct cam_sim *sim, int run_queue) 4830 { 4831 struct camq *sendq; 4832 4833 sim_lock_assert_owned(sim->lock); 4834 4835 if (sim->devq == NULL) 4836 return; 4837 4838 sendq = &(sim->devq->send_queue); 4839 if (sendq->qfrozen_cnt > 0) { 4840 sendq->qfrozen_cnt--; 4841 if (sendq->qfrozen_cnt == 0) { 4842 struct cam_eb *bus; 4843 4844 /* 4845 * If there is a timeout scheduled to release this 4846 * sim queue, remove it. The queue frozen count is 4847 * already at 0. 4848 */ 4849 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4850 callout_stop(&sim->callout); 4851 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4852 } 4853 bus = xpt_find_bus(sim->path_id); 4854 4855 if (run_queue) { 4856 /* 4857 * Now that we are unfrozen run the send queue. 4858 */ 4859 xpt_run_dev_sendq(bus); 4860 } 4861 xpt_release_bus(bus); 4862 } 4863 } 4864 } 4865 4866 void 4867 xpt_done(union ccb *done_ccb) 4868 { 4869 struct cam_sim *sim; 4870 4871 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4872 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4873 /* 4874 * Queue up the request for handling by our SWI handler 4875 * any of the "non-immediate" type of ccbs. 4876 */ 4877 sim = done_ccb->ccb_h.path->bus->sim; 4878 switch (done_ccb->ccb_h.path->periph->type) { 4879 case CAM_PERIPH_BIO: 4880 spin_lock(&sim->sim_spin); 4881 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4882 sim_links.tqe); 4883 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4884 spin_unlock(&sim->sim_spin); 4885 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4886 spin_lock(&cam_simq_spin); 4887 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4888 TAILQ_INSERT_TAIL(&cam_simq, sim, 4889 links); 4890 sim->flags |= CAM_SIM_ON_DONEQ; 4891 } 4892 spin_unlock(&cam_simq_spin); 4893 } 4894 if ((done_ccb->ccb_h.flags & CAM_POLLED) == 0) 4895 setsoftcambio(); 4896 break; 4897 default: 4898 panic("unknown periph type %d", 4899 done_ccb->ccb_h.path->periph->type); 4900 } 4901 } 4902 } 4903 4904 union ccb * 4905 xpt_alloc_ccb(void) 4906 { 4907 union ccb *new_ccb; 4908 4909 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); 4910 return (new_ccb); 4911 } 4912 4913 void 4914 xpt_free_ccb(union ccb *free_ccb) 4915 { 4916 kfree(free_ccb, M_CAMXPT); 4917 } 4918 4919 4920 4921 /* Private XPT functions */ 4922 4923 /* 4924 * Get a CAM control block for the caller. Charge the structure to the device 4925 * referenced by the path. If the this device has no 'credits' then the 4926 * device already has the maximum number of outstanding operations under way 4927 * and we return NULL. If we don't have sufficient resources to allocate more 4928 * ccbs, we also return NULL. 4929 */ 4930 static union ccb * 4931 xpt_get_ccb(struct cam_ed *device) 4932 { 4933 union ccb *new_ccb; 4934 struct cam_sim *sim; 4935 4936 sim = device->sim; 4937 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4938 new_ccb = xpt_alloc_ccb(); 4939 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4940 callout_init(&new_ccb->ccb_h.timeout_ch); 4941 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4942 xpt_links.sle); 4943 sim->ccb_count++; 4944 } 4945 cam_ccbq_take_opening(&device->ccbq); 4946 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4947 return (new_ccb); 4948 } 4949 4950 static void 4951 xpt_release_bus(struct cam_eb *bus) 4952 { 4953 4954 if ((--bus->refcount == 0) 4955 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4956 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4957 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4958 xsoftc.bus_generation++; 4959 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4960 kfree(bus, M_CAMXPT); 4961 } 4962 } 4963 4964 static struct cam_et * 4965 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4966 { 4967 struct cam_et *target; 4968 struct cam_et *cur_target; 4969 4970 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); 4971 4972 TAILQ_INIT(&target->ed_entries); 4973 target->bus = bus; 4974 target->target_id = target_id; 4975 target->refcount = 1; 4976 target->generation = 0; 4977 timevalclear(&target->last_reset); 4978 /* 4979 * Hold a reference to our parent bus so it 4980 * will not go away before we do. 4981 */ 4982 bus->refcount++; 4983 4984 /* Insertion sort into our bus's target list */ 4985 cur_target = TAILQ_FIRST(&bus->et_entries); 4986 while (cur_target != NULL && cur_target->target_id < target_id) 4987 cur_target = TAILQ_NEXT(cur_target, links); 4988 4989 if (cur_target != NULL) { 4990 TAILQ_INSERT_BEFORE(cur_target, target, links); 4991 } else { 4992 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4993 } 4994 bus->generation++; 4995 return (target); 4996 } 4997 4998 static void 4999 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 5000 { 5001 if (target->refcount == 1) { 5002 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 5003 TAILQ_REMOVE(&bus->et_entries, target, links); 5004 bus->generation++; 5005 xpt_release_bus(bus); 5006 KKASSERT(target->refcount == 1); 5007 kfree(target, M_CAMXPT); 5008 } else { 5009 --target->refcount; 5010 } 5011 } 5012 5013 static struct cam_ed * 5014 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 5015 { 5016 struct cam_path path; 5017 struct cam_ed *device; 5018 struct cam_devq *devq; 5019 cam_status status; 5020 5021 /* 5022 * Disallow new devices while trying to deregister a sim 5023 */ 5024 if (bus->sim->flags & CAM_SIM_DEREGISTERED) 5025 return (NULL); 5026 5027 /* 5028 * Make space for us in the device queue on our bus 5029 */ 5030 devq = bus->sim->devq; 5031 if (devq == NULL) 5032 return(NULL); 5033 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 5034 5035 if (status != CAM_REQ_CMP) { 5036 device = NULL; 5037 } else { 5038 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); 5039 } 5040 5041 if (device != NULL) { 5042 struct cam_ed *cur_device; 5043 5044 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 5045 device->alloc_ccb_entry.device = device; 5046 cam_init_pinfo(&device->send_ccb_entry.pinfo); 5047 device->send_ccb_entry.device = device; 5048 device->target = target; 5049 device->lun_id = lun_id; 5050 device->sim = bus->sim; 5051 /* Initialize our queues */ 5052 if (camq_init(&device->drvq, 0) != 0) { 5053 kfree(device, M_CAMXPT); 5054 return (NULL); 5055 } 5056 if (cam_ccbq_init(&device->ccbq, 5057 bus->sim->max_dev_openings) != 0) { 5058 camq_fini(&device->drvq); 5059 kfree(device, M_CAMXPT); 5060 return (NULL); 5061 } 5062 SLIST_INIT(&device->asyncs); 5063 SLIST_INIT(&device->periphs); 5064 device->generation = 0; 5065 device->owner = NULL; 5066 /* 5067 * Take the default quirk entry until we have inquiry 5068 * data and can determine a better quirk to use. 5069 */ 5070 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 5071 bzero(&device->inq_data, sizeof(device->inq_data)); 5072 device->inq_flags = 0; 5073 device->queue_flags = 0; 5074 device->serial_num = NULL; 5075 device->serial_num_len = 0; 5076 device->qfrozen_cnt = 0; 5077 device->flags = CAM_DEV_UNCONFIGURED; 5078 device->tag_delay_count = 0; 5079 device->tag_saved_openings = 0; 5080 device->refcount = 1; 5081 callout_init(&device->callout); 5082 5083 /* 5084 * Hold a reference to our parent target so it 5085 * will not go away before we do. 5086 */ 5087 target->refcount++; 5088 5089 /* 5090 * XXX should be limited by number of CCBs this bus can 5091 * do. 5092 */ 5093 bus->sim->max_ccbs += device->ccbq.devq_openings; 5094 /* Insertion sort into our target's device list */ 5095 cur_device = TAILQ_FIRST(&target->ed_entries); 5096 while (cur_device != NULL && cur_device->lun_id < lun_id) 5097 cur_device = TAILQ_NEXT(cur_device, links); 5098 if (cur_device != NULL) { 5099 TAILQ_INSERT_BEFORE(cur_device, device, links); 5100 } else { 5101 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 5102 } 5103 target->generation++; 5104 if (lun_id != CAM_LUN_WILDCARD) { 5105 xpt_compile_path(&path, 5106 NULL, 5107 bus->path_id, 5108 target->target_id, 5109 lun_id); 5110 xpt_devise_transport(&path); 5111 xpt_release_path(&path); 5112 } 5113 } 5114 return (device); 5115 } 5116 5117 static void 5118 xpt_reference_device(struct cam_ed *device) 5119 { 5120 ++device->refcount; 5121 } 5122 5123 static void 5124 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 5125 struct cam_ed *device) 5126 { 5127 struct cam_devq *devq; 5128 5129 if (device->refcount == 1) { 5130 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 5131 5132 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 5133 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 5134 panic("Removing device while still queued for ccbs"); 5135 5136 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 5137 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 5138 callout_stop(&device->callout); 5139 } 5140 5141 TAILQ_REMOVE(&target->ed_entries, device,links); 5142 target->generation++; 5143 bus->sim->max_ccbs -= device->ccbq.devq_openings; 5144 if ((devq = bus->sim->devq) != NULL) { 5145 /* Release our slot in the devq */ 5146 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 5147 } 5148 camq_fini(&device->drvq); 5149 camq_fini(&device->ccbq.queue); 5150 xpt_release_target(bus, target); 5151 KKASSERT(device->refcount == 1); 5152 kfree(device, M_CAMXPT); 5153 } else { 5154 --device->refcount; 5155 } 5156 } 5157 5158 static u_int32_t 5159 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5160 { 5161 int diff; 5162 int result; 5163 struct cam_ed *dev; 5164 5165 dev = path->device; 5166 5167 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 5168 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5169 if (result == CAM_REQ_CMP && (diff < 0)) { 5170 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 5171 } 5172 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5173 || (dev->inq_flags & SID_CmdQue) != 0) 5174 dev->tag_saved_openings = newopenings; 5175 /* Adjust the global limit */ 5176 dev->sim->max_ccbs += diff; 5177 return (result); 5178 } 5179 5180 static struct cam_eb * 5181 xpt_find_bus(path_id_t path_id) 5182 { 5183 struct cam_eb *bus; 5184 5185 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5186 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 5187 if (bus->path_id == path_id) { 5188 bus->refcount++; 5189 break; 5190 } 5191 } 5192 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5193 return (bus); 5194 } 5195 5196 static struct cam_et * 5197 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5198 { 5199 struct cam_et *target; 5200 5201 TAILQ_FOREACH(target, &bus->et_entries, links) { 5202 if (target->target_id == target_id) { 5203 target->refcount++; 5204 break; 5205 } 5206 } 5207 return (target); 5208 } 5209 5210 static struct cam_ed * 5211 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5212 { 5213 struct cam_ed *device; 5214 5215 TAILQ_FOREACH(device, &target->ed_entries, links) { 5216 if (device->lun_id == lun_id) { 5217 device->refcount++; 5218 break; 5219 } 5220 } 5221 return (device); 5222 } 5223 5224 typedef struct { 5225 union ccb *request_ccb; 5226 struct ccb_pathinq *cpi; 5227 int counter; 5228 } xpt_scan_bus_info; 5229 5230 /* 5231 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5232 * As the scan progresses, xpt_scan_bus is used as the 5233 * callback on completion function. 5234 */ 5235 static void 5236 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5237 { 5238 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5239 ("xpt_scan_bus\n")); 5240 switch (request_ccb->ccb_h.func_code) { 5241 case XPT_SCAN_BUS: 5242 { 5243 xpt_scan_bus_info *scan_info; 5244 union ccb *work_ccb; 5245 struct cam_path *path; 5246 u_int i; 5247 u_int max_target; 5248 u_int initiator_id; 5249 5250 /* Find out the characteristics of the bus */ 5251 work_ccb = xpt_alloc_ccb(); 5252 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5253 request_ccb->ccb_h.pinfo.priority); 5254 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5255 xpt_action(work_ccb); 5256 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5257 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5258 xpt_free_ccb(work_ccb); 5259 xpt_done(request_ccb); 5260 return; 5261 } 5262 5263 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5264 /* 5265 * Can't scan the bus on an adapter that 5266 * cannot perform the initiator role. 5267 */ 5268 request_ccb->ccb_h.status = CAM_REQ_CMP; 5269 xpt_free_ccb(work_ccb); 5270 xpt_done(request_ccb); 5271 return; 5272 } 5273 5274 /* Save some state for use while we probe for devices */ 5275 scan_info = (xpt_scan_bus_info *) 5276 kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); 5277 scan_info->request_ccb = request_ccb; 5278 scan_info->cpi = &work_ccb->cpi; 5279 5280 /* Cache on our stack so we can work asynchronously */ 5281 max_target = scan_info->cpi->max_target; 5282 initiator_id = scan_info->cpi->initiator_id; 5283 5284 5285 /* 5286 * We can scan all targets in parallel, or do it sequentially. 5287 */ 5288 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5289 max_target = 0; 5290 scan_info->counter = 0; 5291 } else { 5292 scan_info->counter = scan_info->cpi->max_target + 1; 5293 if (scan_info->cpi->initiator_id < scan_info->counter) { 5294 scan_info->counter--; 5295 } 5296 } 5297 5298 for (i = 0; i <= max_target; i++) { 5299 cam_status status; 5300 if (i == initiator_id) 5301 continue; 5302 5303 status = xpt_create_path(&path, xpt_periph, 5304 request_ccb->ccb_h.path_id, 5305 i, 0); 5306 if (status != CAM_REQ_CMP) { 5307 kprintf("xpt_scan_bus: xpt_create_path failed" 5308 " with status %#x, bus scan halted\n", 5309 status); 5310 kfree(scan_info, M_CAMXPT); 5311 request_ccb->ccb_h.status = status; 5312 xpt_free_ccb(work_ccb); 5313 xpt_done(request_ccb); 5314 break; 5315 } 5316 work_ccb = xpt_alloc_ccb(); 5317 xpt_setup_ccb(&work_ccb->ccb_h, path, 5318 request_ccb->ccb_h.pinfo.priority); 5319 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5320 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5321 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5322 work_ccb->crcn.flags = request_ccb->crcn.flags; 5323 xpt_action(work_ccb); 5324 } 5325 break; 5326 } 5327 case XPT_SCAN_LUN: 5328 { 5329 cam_status status; 5330 struct cam_path *path; 5331 xpt_scan_bus_info *scan_info; 5332 path_id_t path_id; 5333 target_id_t target_id; 5334 lun_id_t lun_id; 5335 5336 /* Reuse the same CCB to query if a device was really found */ 5337 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5338 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5339 request_ccb->ccb_h.pinfo.priority); 5340 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5341 5342 path_id = request_ccb->ccb_h.path_id; 5343 target_id = request_ccb->ccb_h.target_id; 5344 lun_id = request_ccb->ccb_h.target_lun; 5345 xpt_action(request_ccb); 5346 5347 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5348 struct cam_ed *device; 5349 struct cam_et *target; 5350 int phl; 5351 5352 /* 5353 * If we already probed lun 0 successfully, or 5354 * we have additional configured luns on this 5355 * target that might have "gone away", go onto 5356 * the next lun. 5357 */ 5358 target = request_ccb->ccb_h.path->target; 5359 /* 5360 * We may touch devices that we don't 5361 * hold references too, so ensure they 5362 * don't disappear out from under us. 5363 * The target above is referenced by the 5364 * path in the request ccb. 5365 */ 5366 phl = 0; 5367 device = TAILQ_FIRST(&target->ed_entries); 5368 if (device != NULL) { 5369 phl = CAN_SRCH_HI_SPARSE(device); 5370 if (device->lun_id == 0) 5371 device = TAILQ_NEXT(device, links); 5372 } 5373 if ((lun_id != 0) || (device != NULL)) { 5374 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5375 lun_id++; 5376 } 5377 } else { 5378 struct cam_ed *device; 5379 5380 device = request_ccb->ccb_h.path->device; 5381 5382 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5383 /* Try the next lun */ 5384 if (lun_id < (CAM_SCSI2_MAXLUN-1) 5385 || CAN_SRCH_HI_DENSE(device)) 5386 lun_id++; 5387 } 5388 } 5389 5390 /* 5391 * Free the current request path- we're done with it. 5392 */ 5393 xpt_free_path(request_ccb->ccb_h.path); 5394 5395 /* 5396 * Check to see if we scan any further luns. 5397 */ 5398 if (lun_id == request_ccb->ccb_h.target_lun 5399 || lun_id > scan_info->cpi->max_lun) { 5400 int done; 5401 5402 hop_again: 5403 done = 0; 5404 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5405 scan_info->counter++; 5406 if (scan_info->counter == 5407 scan_info->cpi->initiator_id) { 5408 scan_info->counter++; 5409 } 5410 if (scan_info->counter >= 5411 scan_info->cpi->max_target+1) { 5412 done = 1; 5413 } 5414 } else { 5415 scan_info->counter--; 5416 if (scan_info->counter == 0) { 5417 done = 1; 5418 } 5419 } 5420 if (done) { 5421 xpt_free_ccb(request_ccb); 5422 xpt_free_ccb((union ccb *)scan_info->cpi); 5423 request_ccb = scan_info->request_ccb; 5424 kfree(scan_info, M_CAMXPT); 5425 request_ccb->ccb_h.status = CAM_REQ_CMP; 5426 xpt_done(request_ccb); 5427 break; 5428 } 5429 5430 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { 5431 break; 5432 } 5433 status = xpt_create_path(&path, xpt_periph, 5434 scan_info->request_ccb->ccb_h.path_id, 5435 scan_info->counter, 0); 5436 if (status != CAM_REQ_CMP) { 5437 kprintf("xpt_scan_bus: xpt_create_path failed" 5438 " with status %#x, bus scan halted\n", 5439 status); 5440 xpt_free_ccb(request_ccb); 5441 xpt_free_ccb((union ccb *)scan_info->cpi); 5442 request_ccb = scan_info->request_ccb; 5443 kfree(scan_info, M_CAMXPT); 5444 request_ccb->ccb_h.status = status; 5445 xpt_done(request_ccb); 5446 break; 5447 } 5448 xpt_setup_ccb(&request_ccb->ccb_h, path, 5449 request_ccb->ccb_h.pinfo.priority); 5450 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5451 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5452 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5453 request_ccb->crcn.flags = 5454 scan_info->request_ccb->crcn.flags; 5455 } else { 5456 status = xpt_create_path(&path, xpt_periph, 5457 path_id, target_id, lun_id); 5458 if (status != CAM_REQ_CMP) { 5459 kprintf("xpt_scan_bus: xpt_create_path failed " 5460 "with status %#x, halting LUN scan\n", 5461 status); 5462 goto hop_again; 5463 } 5464 xpt_setup_ccb(&request_ccb->ccb_h, path, 5465 request_ccb->ccb_h.pinfo.priority); 5466 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5467 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5468 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5469 request_ccb->crcn.flags = 5470 scan_info->request_ccb->crcn.flags; 5471 } 5472 xpt_action(request_ccb); 5473 break; 5474 } 5475 default: 5476 break; 5477 } 5478 } 5479 5480 typedef enum { 5481 PROBE_TUR, 5482 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ 5483 PROBE_FULL_INQUIRY, 5484 PROBE_MODE_SENSE, 5485 PROBE_SERIAL_NUM_0, 5486 PROBE_SERIAL_NUM_1, 5487 PROBE_TUR_FOR_NEGOTIATION, 5488 PROBE_INQUIRY_BASIC_DV1, 5489 PROBE_INQUIRY_BASIC_DV2, 5490 PROBE_DV_EXIT, 5491 PROBE_INVALID 5492 } probe_action; 5493 5494 static char *probe_action_text[] = { 5495 "PROBE_TUR", 5496 "PROBE_INQUIRY", 5497 "PROBE_FULL_INQUIRY", 5498 "PROBE_MODE_SENSE", 5499 "PROBE_SERIAL_NUM_0", 5500 "PROBE_SERIAL_NUM_1", 5501 "PROBE_TUR_FOR_NEGOTIATION", 5502 "PROBE_INQUIRY_BASIC_DV1", 5503 "PROBE_INQUIRY_BASIC_DV2", 5504 "PROBE_DV_EXIT", 5505 "PROBE_INVALID" 5506 }; 5507 5508 #define PROBE_SET_ACTION(softc, newaction) \ 5509 do { \ 5510 char **text; \ 5511 text = probe_action_text; \ 5512 CAM_DEBUG((softc)->periph->path, CAM_DEBUG_INFO, \ 5513 ("Probe %s to %s\n", text[(softc)->action], \ 5514 text[(newaction)])); \ 5515 (softc)->action = (newaction); \ 5516 } while(0) 5517 5518 typedef enum { 5519 PROBE_INQUIRY_CKSUM = 0x01, 5520 PROBE_SERIAL_CKSUM = 0x02, 5521 PROBE_NO_ANNOUNCE = 0x04 5522 } probe_flags; 5523 5524 typedef struct { 5525 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5526 probe_action action; 5527 union ccb saved_ccb; 5528 probe_flags flags; 5529 MD5_CTX context; 5530 u_int8_t digest[16]; 5531 struct cam_periph *periph; 5532 } probe_softc; 5533 5534 static void 5535 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5536 cam_flags flags, union ccb *request_ccb) 5537 { 5538 struct ccb_pathinq cpi; 5539 cam_status status; 5540 struct cam_path *new_path; 5541 struct cam_periph *old_periph; 5542 5543 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5544 ("xpt_scan_lun\n")); 5545 5546 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5547 cpi.ccb_h.func_code = XPT_PATH_INQ; 5548 xpt_action((union ccb *)&cpi); 5549 5550 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5551 if (request_ccb != NULL) { 5552 request_ccb->ccb_h.status = cpi.ccb_h.status; 5553 xpt_done(request_ccb); 5554 } 5555 return; 5556 } 5557 5558 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5559 /* 5560 * Can't scan the bus on an adapter that 5561 * cannot perform the initiator role. 5562 */ 5563 if (request_ccb != NULL) { 5564 request_ccb->ccb_h.status = CAM_REQ_CMP; 5565 xpt_done(request_ccb); 5566 } 5567 return; 5568 } 5569 5570 if (request_ccb == NULL) { 5571 request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); 5572 new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); 5573 status = xpt_compile_path(new_path, xpt_periph, 5574 path->bus->path_id, 5575 path->target->target_id, 5576 path->device->lun_id); 5577 5578 if (status != CAM_REQ_CMP) { 5579 xpt_print(path, "xpt_scan_lun: can't compile path, " 5580 "can't continue\n"); 5581 kfree(request_ccb, M_CAMXPT); 5582 kfree(new_path, M_CAMXPT); 5583 return; 5584 } 5585 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5586 request_ccb->ccb_h.cbfcnp = xptscandone; 5587 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5588 request_ccb->crcn.flags = flags; 5589 } 5590 5591 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5592 probe_softc *softc; 5593 5594 softc = (probe_softc *)old_periph->softc; 5595 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5596 periph_links.tqe); 5597 } else { 5598 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5599 probestart, "probe", 5600 CAM_PERIPH_BIO, 5601 request_ccb->ccb_h.path, NULL, 0, 5602 request_ccb); 5603 5604 if (status != CAM_REQ_CMP) { 5605 xpt_print(path, "xpt_scan_lun: cam_alloc_periph " 5606 "returned an error, can't continue probe\n"); 5607 request_ccb->ccb_h.status = status; 5608 xpt_done(request_ccb); 5609 } 5610 } 5611 } 5612 5613 static void 5614 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5615 { 5616 xpt_release_path(done_ccb->ccb_h.path); 5617 kfree(done_ccb->ccb_h.path, M_CAMXPT); 5618 kfree(done_ccb, M_CAMXPT); 5619 } 5620 5621 static cam_status 5622 proberegister(struct cam_periph *periph, void *arg) 5623 { 5624 union ccb *request_ccb; /* CCB representing the probe request */ 5625 cam_status status; 5626 probe_softc *softc; 5627 5628 request_ccb = (union ccb *)arg; 5629 if (periph == NULL) { 5630 kprintf("proberegister: periph was NULL!!\n"); 5631 return(CAM_REQ_CMP_ERR); 5632 } 5633 5634 if (request_ccb == NULL) { 5635 kprintf("proberegister: no probe CCB, " 5636 "can't register device\n"); 5637 return(CAM_REQ_CMP_ERR); 5638 } 5639 5640 softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); 5641 TAILQ_INIT(&softc->request_ccbs); 5642 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5643 periph_links.tqe); 5644 softc->flags = 0; 5645 periph->softc = softc; 5646 softc->periph = periph; 5647 softc->action = PROBE_INVALID; 5648 status = cam_periph_acquire(periph); 5649 if (status != CAM_REQ_CMP) { 5650 return (status); 5651 } 5652 5653 5654 /* 5655 * Ensure we've waited at least a bus settle 5656 * delay before attempting to probe the device. 5657 * For HBAs that don't do bus resets, this won't make a difference. 5658 */ 5659 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5660 scsi_delay); 5661 probeschedule(periph); 5662 return(CAM_REQ_CMP); 5663 } 5664 5665 static void 5666 probeschedule(struct cam_periph *periph) 5667 { 5668 struct ccb_pathinq cpi; 5669 union ccb *ccb; 5670 probe_softc *softc; 5671 5672 softc = (probe_softc *)periph->softc; 5673 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5674 5675 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5676 cpi.ccb_h.func_code = XPT_PATH_INQ; 5677 xpt_action((union ccb *)&cpi); 5678 5679 /* 5680 * If a device has gone away and another device, or the same one, 5681 * is back in the same place, it should have a unit attention 5682 * condition pending. It will not report the unit attention in 5683 * response to an inquiry, which may leave invalid transfer 5684 * negotiations in effect. The TUR will reveal the unit attention 5685 * condition. Only send the TUR for lun 0, since some devices 5686 * will get confused by commands other than inquiry to non-existent 5687 * luns. If you think a device has gone away start your scan from 5688 * lun 0. This will insure that any bogus transfer settings are 5689 * invalidated. 5690 * 5691 * If we haven't seen the device before and the controller supports 5692 * some kind of transfer negotiation, negotiate with the first 5693 * sent command if no bus reset was performed at startup. This 5694 * ensures that the device is not confused by transfer negotiation 5695 * settings left over by loader or BIOS action. 5696 */ 5697 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5698 && (ccb->ccb_h.target_lun == 0)) { 5699 PROBE_SET_ACTION(softc, PROBE_TUR); 5700 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5701 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5702 proberequestdefaultnegotiation(periph); 5703 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 5704 } else { 5705 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 5706 } 5707 5708 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5709 softc->flags |= PROBE_NO_ANNOUNCE; 5710 else 5711 softc->flags &= ~PROBE_NO_ANNOUNCE; 5712 5713 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5714 } 5715 5716 static void 5717 probestart(struct cam_periph *periph, union ccb *start_ccb) 5718 { 5719 /* Probe the device that our peripheral driver points to */ 5720 struct ccb_scsiio *csio; 5721 probe_softc *softc; 5722 5723 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5724 5725 softc = (probe_softc *)periph->softc; 5726 csio = &start_ccb->csio; 5727 5728 switch (softc->action) { 5729 case PROBE_TUR: 5730 case PROBE_TUR_FOR_NEGOTIATION: 5731 case PROBE_DV_EXIT: 5732 { 5733 scsi_test_unit_ready(csio, 5734 /*retries*/4, 5735 probedone, 5736 MSG_SIMPLE_Q_TAG, 5737 SSD_FULL_SIZE, 5738 /*timeout*/60000); 5739 break; 5740 } 5741 case PROBE_INQUIRY: 5742 case PROBE_FULL_INQUIRY: 5743 case PROBE_INQUIRY_BASIC_DV1: 5744 case PROBE_INQUIRY_BASIC_DV2: 5745 { 5746 u_int inquiry_len; 5747 struct scsi_inquiry_data *inq_buf; 5748 5749 inq_buf = &periph->path->device->inq_data; 5750 5751 /* 5752 * If the device is currently configured, we calculate an 5753 * MD5 checksum of the inquiry data, and if the serial number 5754 * length is greater than 0, add the serial number data 5755 * into the checksum as well. Once the inquiry and the 5756 * serial number check finish, we attempt to figure out 5757 * whether we still have the same device. 5758 */ 5759 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5760 5761 MD5Init(&softc->context); 5762 MD5Update(&softc->context, (unsigned char *)inq_buf, 5763 sizeof(struct scsi_inquiry_data)); 5764 softc->flags |= PROBE_INQUIRY_CKSUM; 5765 if (periph->path->device->serial_num_len > 0) { 5766 MD5Update(&softc->context, 5767 periph->path->device->serial_num, 5768 periph->path->device->serial_num_len); 5769 softc->flags |= PROBE_SERIAL_CKSUM; 5770 } 5771 MD5Final(softc->digest, &softc->context); 5772 } 5773 5774 if (softc->action == PROBE_INQUIRY) 5775 inquiry_len = SHORT_INQUIRY_LENGTH; 5776 else 5777 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); 5778 5779 /* 5780 * Some parallel SCSI devices fail to send an 5781 * ignore wide residue message when dealing with 5782 * odd length inquiry requests. Round up to be 5783 * safe. 5784 */ 5785 inquiry_len = roundup2(inquiry_len, 2); 5786 5787 if (softc->action == PROBE_INQUIRY_BASIC_DV1 5788 || softc->action == PROBE_INQUIRY_BASIC_DV2) { 5789 inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); 5790 } 5791 scsi_inquiry(csio, 5792 /*retries*/4, 5793 probedone, 5794 MSG_SIMPLE_Q_TAG, 5795 (u_int8_t *)inq_buf, 5796 inquiry_len, 5797 /*evpd*/FALSE, 5798 /*page_code*/0, 5799 SSD_MIN_SIZE, 5800 /*timeout*/60 * 1000); 5801 break; 5802 } 5803 case PROBE_MODE_SENSE: 5804 { 5805 void *mode_buf; 5806 int mode_buf_len; 5807 5808 mode_buf_len = sizeof(struct scsi_mode_header_6) 5809 + sizeof(struct scsi_mode_blk_desc) 5810 + sizeof(struct scsi_control_page); 5811 mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); 5812 scsi_mode_sense(csio, 5813 /*retries*/4, 5814 probedone, 5815 MSG_SIMPLE_Q_TAG, 5816 /*dbd*/FALSE, 5817 SMS_PAGE_CTRL_CURRENT, 5818 SMS_CONTROL_MODE_PAGE, 5819 mode_buf, 5820 mode_buf_len, 5821 SSD_FULL_SIZE, 5822 /*timeout*/60000); 5823 break; 5824 } 5825 case PROBE_SERIAL_NUM_0: 5826 { 5827 struct scsi_vpd_supported_page_list *vpd_list = NULL; 5828 struct cam_ed *device; 5829 5830 device = periph->path->device; 5831 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5832 vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, 5833 M_INTWAIT | M_ZERO); 5834 } 5835 5836 if (vpd_list != NULL) { 5837 scsi_inquiry(csio, 5838 /*retries*/4, 5839 probedone, 5840 MSG_SIMPLE_Q_TAG, 5841 (u_int8_t *)vpd_list, 5842 sizeof(*vpd_list), 5843 /*evpd*/TRUE, 5844 SVPD_SUPPORTED_PAGE_LIST, 5845 SSD_MIN_SIZE, 5846 /*timeout*/60 * 1000); 5847 break; 5848 } 5849 /* 5850 * We'll have to do without, let our probedone 5851 * routine finish up for us. 5852 */ 5853 start_ccb->csio.data_ptr = NULL; 5854 probedone(periph, start_ccb); 5855 return; 5856 } 5857 case PROBE_SERIAL_NUM_1: 5858 { 5859 struct scsi_vpd_unit_serial_number *serial_buf; 5860 struct cam_ed* device; 5861 5862 serial_buf = NULL; 5863 device = periph->path->device; 5864 device->serial_num = NULL; 5865 device->serial_num_len = 0; 5866 5867 serial_buf = (struct scsi_vpd_unit_serial_number *) 5868 kmalloc(sizeof(*serial_buf), M_CAMXPT, 5869 M_INTWAIT | M_ZERO); 5870 scsi_inquiry(csio, 5871 /*retries*/4, 5872 probedone, 5873 MSG_SIMPLE_Q_TAG, 5874 (u_int8_t *)serial_buf, 5875 sizeof(*serial_buf), 5876 /*evpd*/TRUE, 5877 SVPD_UNIT_SERIAL_NUMBER, 5878 SSD_MIN_SIZE, 5879 /*timeout*/60 * 1000); 5880 break; 5881 } 5882 case PROBE_INVALID: 5883 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 5884 ("probestart: invalid action state\n")); 5885 default: 5886 break; 5887 } 5888 xpt_action(start_ccb); 5889 } 5890 5891 static void 5892 proberequestdefaultnegotiation(struct cam_periph *periph) 5893 { 5894 struct ccb_trans_settings cts; 5895 5896 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5897 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5898 cts.type = CTS_TYPE_USER_SETTINGS; 5899 xpt_action((union ccb *)&cts); 5900 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5901 return; 5902 } 5903 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5904 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5905 xpt_action((union ccb *)&cts); 5906 } 5907 5908 /* 5909 * Backoff Negotiation Code- only pertinent for SPI devices. 5910 */ 5911 static int 5912 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) 5913 { 5914 struct ccb_trans_settings cts; 5915 struct ccb_trans_settings_spi *spi; 5916 5917 memset(&cts, 0, sizeof (cts)); 5918 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5919 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5920 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5921 xpt_action((union ccb *)&cts); 5922 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5923 if (bootverbose) { 5924 xpt_print(periph->path, 5925 "failed to get current device settings\n"); 5926 } 5927 return (0); 5928 } 5929 if (cts.transport != XPORT_SPI) { 5930 if (bootverbose) { 5931 xpt_print(periph->path, "not SPI transport\n"); 5932 } 5933 return (0); 5934 } 5935 spi = &cts.xport_specific.spi; 5936 5937 /* 5938 * We cannot renegotiate sync rate if we don't have one. 5939 */ 5940 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { 5941 if (bootverbose) { 5942 xpt_print(periph->path, "no sync rate known\n"); 5943 } 5944 return (0); 5945 } 5946 5947 /* 5948 * We'll assert that we don't have to touch PPR options- the 5949 * SIM will see what we do with period and offset and adjust 5950 * the PPR options as appropriate. 5951 */ 5952 5953 /* 5954 * A sync rate with unknown or zero offset is nonsensical. 5955 * A sync period of zero means Async. 5956 */ 5957 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 5958 || spi->sync_offset == 0 || spi->sync_period == 0) { 5959 if (bootverbose) { 5960 xpt_print(periph->path, "no sync rate available\n"); 5961 } 5962 return (0); 5963 } 5964 5965 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { 5966 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5967 ("hit async: giving up on DV\n")); 5968 return (0); 5969 } 5970 5971 5972 /* 5973 * Jump sync_period up by one, but stop at 5MHz and fall back to Async. 5974 * We don't try to remember 'last' settings to see if the SIM actually 5975 * gets into the speed we want to set. We check on the SIM telling 5976 * us that a requested speed is bad, but otherwise don't try and 5977 * check the speed due to the asynchronous and handshake nature 5978 * of speed setting. 5979 */ 5980 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; 5981 for (;;) { 5982 spi->sync_period++; 5983 if (spi->sync_period >= 0xf) { 5984 spi->sync_period = 0; 5985 spi->sync_offset = 0; 5986 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5987 ("setting to async for DV\n")); 5988 /* 5989 * Once we hit async, we don't want to try 5990 * any more settings. 5991 */ 5992 device->flags |= CAM_DEV_DV_HIT_BOTTOM; 5993 } else if (bootverbose) { 5994 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5995 ("DV: period 0x%x\n", spi->sync_period)); 5996 kprintf("setting period to 0x%x\n", spi->sync_period); 5997 } 5998 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5999 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6000 xpt_action((union ccb *)&cts); 6001 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6002 break; 6003 } 6004 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6005 ("DV: failed to set period 0x%x\n", spi->sync_period)); 6006 if (spi->sync_period == 0) { 6007 return (0); 6008 } 6009 } 6010 return (1); 6011 } 6012 6013 static void 6014 probedone(struct cam_periph *periph, union ccb *done_ccb) 6015 { 6016 probe_softc *softc; 6017 struct cam_path *path; 6018 u_int32_t priority; 6019 6020 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 6021 6022 softc = (probe_softc *)periph->softc; 6023 path = done_ccb->ccb_h.path; 6024 priority = done_ccb->ccb_h.pinfo.priority; 6025 6026 switch (softc->action) { 6027 case PROBE_TUR: 6028 { 6029 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6030 6031 if (cam_periph_error(done_ccb, 0, 6032 SF_NO_PRINT, NULL) == ERESTART) 6033 return; 6034 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 6035 /* Don't wedge the queue */ 6036 xpt_release_devq(done_ccb->ccb_h.path, 6037 /*count*/1, 6038 /*run_queue*/TRUE); 6039 } 6040 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 6041 xpt_release_ccb(done_ccb); 6042 xpt_schedule(periph, priority); 6043 return; 6044 } 6045 case PROBE_INQUIRY: 6046 case PROBE_FULL_INQUIRY: 6047 { 6048 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6049 struct scsi_inquiry_data *inq_buf; 6050 u_int8_t periph_qual; 6051 6052 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 6053 inq_buf = &path->device->inq_data; 6054 6055 periph_qual = SID_QUAL(inq_buf); 6056 6057 switch(periph_qual) { 6058 case SID_QUAL_LU_CONNECTED: 6059 { 6060 u_int8_t len; 6061 6062 /* 6063 * We conservatively request only 6064 * SHORT_INQUIRY_LEN bytes of inquiry 6065 * information during our first try 6066 * at sending an INQUIRY. If the device 6067 * has more information to give, 6068 * perform a second request specifying 6069 * the amount of information the device 6070 * is willing to give. 6071 */ 6072 len = inq_buf->additional_length 6073 + offsetof(struct scsi_inquiry_data, 6074 additional_length) + 1; 6075 if (softc->action == PROBE_INQUIRY 6076 && len > SHORT_INQUIRY_LENGTH) { 6077 PROBE_SET_ACTION(softc, 6078 PROBE_FULL_INQUIRY); 6079 xpt_release_ccb(done_ccb); 6080 xpt_schedule(periph, priority); 6081 return; 6082 } 6083 6084 xpt_find_quirk(path->device); 6085 6086 xpt_devise_transport(path); 6087 if (INQ_DATA_TQ_ENABLED(inq_buf)) 6088 PROBE_SET_ACTION(softc, PROBE_MODE_SENSE); 6089 else 6090 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0); 6091 6092 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 6093 xpt_reference_device(path->device); 6094 6095 xpt_release_ccb(done_ccb); 6096 xpt_schedule(periph, priority); 6097 return; 6098 } 6099 default: 6100 break; 6101 } 6102 } else if (cam_periph_error(done_ccb, 0, 6103 done_ccb->ccb_h.target_lun > 0 6104 ? SF_RETRY_UA|SF_QUIET_IR 6105 : SF_RETRY_UA, 6106 &softc->saved_ccb) == ERESTART) { 6107 return; 6108 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6109 /* Don't wedge the queue */ 6110 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6111 /*run_queue*/TRUE); 6112 } 6113 /* 6114 * If we get to this point, we got an error status back 6115 * from the inquiry and the error status doesn't require 6116 * automatically retrying the command. Therefore, the 6117 * inquiry failed. If we had inquiry information before 6118 * for this device, but this latest inquiry command failed, 6119 * the device has probably gone away. If this device isn't 6120 * already marked unconfigured, notify the peripheral 6121 * drivers that this device is no more. 6122 */ 6123 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 6124 /* Send the async notification. */ 6125 xpt_async(AC_LOST_DEVICE, path, NULL); 6126 } 6127 6128 xpt_release_ccb(done_ccb); 6129 break; 6130 } 6131 case PROBE_MODE_SENSE: 6132 { 6133 struct ccb_scsiio *csio; 6134 struct scsi_mode_header_6 *mode_hdr; 6135 6136 csio = &done_ccb->csio; 6137 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 6138 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6139 struct scsi_control_page *page; 6140 u_int8_t *offset; 6141 6142 offset = ((u_int8_t *)&mode_hdr[1]) 6143 + mode_hdr->blk_desc_len; 6144 page = (struct scsi_control_page *)offset; 6145 path->device->queue_flags = page->queue_flags; 6146 } else if (cam_periph_error(done_ccb, 0, 6147 SF_RETRY_UA|SF_NO_PRINT, 6148 &softc->saved_ccb) == ERESTART) { 6149 return; 6150 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6151 /* Don't wedge the queue */ 6152 xpt_release_devq(done_ccb->ccb_h.path, 6153 /*count*/1, /*run_queue*/TRUE); 6154 } 6155 xpt_release_ccb(done_ccb); 6156 kfree(mode_hdr, M_CAMXPT); 6157 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0); 6158 xpt_schedule(periph, priority); 6159 return; 6160 } 6161 case PROBE_SERIAL_NUM_0: 6162 { 6163 struct ccb_scsiio *csio; 6164 struct scsi_vpd_supported_page_list *page_list; 6165 int length, serialnum_supported, i; 6166 6167 serialnum_supported = 0; 6168 csio = &done_ccb->csio; 6169 page_list = 6170 (struct scsi_vpd_supported_page_list *)csio->data_ptr; 6171 6172 if (page_list == NULL) { 6173 /* 6174 * Don't process the command as it was never sent 6175 */ 6176 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6177 && (page_list->length > 0)) { 6178 length = min(page_list->length, 6179 SVPD_SUPPORTED_PAGES_SIZE); 6180 for (i = 0; i < length; i++) { 6181 if (page_list->list[i] == 6182 SVPD_UNIT_SERIAL_NUMBER) { 6183 serialnum_supported = 1; 6184 break; 6185 } 6186 } 6187 } else if (cam_periph_error(done_ccb, 0, 6188 SF_RETRY_UA|SF_NO_PRINT, 6189 &softc->saved_ccb) == ERESTART) { 6190 return; 6191 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6192 /* Don't wedge the queue */ 6193 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6194 /*run_queue*/TRUE); 6195 } 6196 6197 if (page_list != NULL) 6198 kfree(page_list, M_DEVBUF); 6199 6200 if (serialnum_supported) { 6201 xpt_release_ccb(done_ccb); 6202 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_1); 6203 xpt_schedule(periph, priority); 6204 return; 6205 } 6206 6207 csio->data_ptr = NULL; 6208 /* FALLTHROUGH */ 6209 } 6210 6211 case PROBE_SERIAL_NUM_1: 6212 { 6213 struct ccb_scsiio *csio; 6214 struct scsi_vpd_unit_serial_number *serial_buf; 6215 u_int32_t priority; 6216 int changed; 6217 int have_serialnum; 6218 6219 changed = 1; 6220 have_serialnum = 0; 6221 csio = &done_ccb->csio; 6222 priority = done_ccb->ccb_h.pinfo.priority; 6223 serial_buf = 6224 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 6225 6226 /* Clean up from previous instance of this device */ 6227 if (path->device->serial_num != NULL) { 6228 kfree(path->device->serial_num, M_CAMXPT); 6229 path->device->serial_num = NULL; 6230 path->device->serial_num_len = 0; 6231 } 6232 6233 if (serial_buf == NULL) { 6234 /* 6235 * Don't process the command as it was never sent 6236 */ 6237 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6238 && (serial_buf->length > 0)) { 6239 6240 have_serialnum = 1; 6241 path->device->serial_num = 6242 kmalloc((serial_buf->length + 1), 6243 M_CAMXPT, M_INTWAIT); 6244 bcopy(serial_buf->serial_num, 6245 path->device->serial_num, 6246 serial_buf->length); 6247 path->device->serial_num_len = serial_buf->length; 6248 path->device->serial_num[serial_buf->length] = '\0'; 6249 } else if (cam_periph_error(done_ccb, 0, 6250 SF_RETRY_UA|SF_NO_PRINT, 6251 &softc->saved_ccb) == ERESTART) { 6252 return; 6253 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6254 /* Don't wedge the queue */ 6255 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6256 /*run_queue*/TRUE); 6257 } 6258 6259 /* 6260 * Let's see if we have seen this device before. 6261 */ 6262 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 6263 MD5_CTX context; 6264 u_int8_t digest[16]; 6265 6266 MD5Init(&context); 6267 6268 MD5Update(&context, 6269 (unsigned char *)&path->device->inq_data, 6270 sizeof(struct scsi_inquiry_data)); 6271 6272 if (have_serialnum) 6273 MD5Update(&context, serial_buf->serial_num, 6274 serial_buf->length); 6275 6276 MD5Final(digest, &context); 6277 if (bcmp(softc->digest, digest, 16) == 0) 6278 changed = 0; 6279 6280 /* 6281 * XXX Do we need to do a TUR in order to ensure 6282 * that the device really hasn't changed??? 6283 */ 6284 if ((changed != 0) 6285 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 6286 xpt_async(AC_LOST_DEVICE, path, NULL); 6287 } 6288 if (serial_buf != NULL) 6289 kfree(serial_buf, M_CAMXPT); 6290 6291 if (changed != 0) { 6292 /* 6293 * Now that we have all the necessary 6294 * information to safely perform transfer 6295 * negotiations... Controllers don't perform 6296 * any negotiation or tagged queuing until 6297 * after the first XPT_SET_TRAN_SETTINGS ccb is 6298 * received. So, on a new device, just retrieve 6299 * the user settings, and set them as the current 6300 * settings to set the device up. 6301 */ 6302 proberequestdefaultnegotiation(periph); 6303 xpt_release_ccb(done_ccb); 6304 6305 /* 6306 * Perform a TUR to allow the controller to 6307 * perform any necessary transfer negotiation. 6308 */ 6309 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION); 6310 xpt_schedule(periph, priority); 6311 return; 6312 } 6313 xpt_release_ccb(done_ccb); 6314 break; 6315 } 6316 case PROBE_TUR_FOR_NEGOTIATION: 6317 case PROBE_DV_EXIT: 6318 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6319 /* Don't wedge the queue */ 6320 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6321 /*run_queue*/TRUE); 6322 } 6323 6324 xpt_reference_device(path->device); 6325 /* 6326 * Do Domain Validation for lun 0 on devices that claim 6327 * to support Synchronous Transfer modes. 6328 */ 6329 if (softc->action == PROBE_TUR_FOR_NEGOTIATION 6330 && done_ccb->ccb_h.target_lun == 0 6331 && (path->device->inq_data.flags & SID_Sync) != 0 6332 && (path->device->flags & CAM_DEV_IN_DV) == 0) { 6333 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6334 ("Begin Domain Validation\n")); 6335 path->device->flags |= CAM_DEV_IN_DV; 6336 xpt_release_ccb(done_ccb); 6337 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV1); 6338 xpt_schedule(periph, priority); 6339 return; 6340 } 6341 if (softc->action == PROBE_DV_EXIT) { 6342 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6343 ("Leave Domain Validation\n")); 6344 } 6345 path->device->flags &= 6346 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6347 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6348 /* Inform the XPT that a new device has been found */ 6349 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6350 xpt_action(done_ccb); 6351 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6352 done_ccb); 6353 } 6354 xpt_release_ccb(done_ccb); 6355 break; 6356 case PROBE_INQUIRY_BASIC_DV1: 6357 case PROBE_INQUIRY_BASIC_DV2: 6358 { 6359 struct scsi_inquiry_data *nbuf; 6360 struct ccb_scsiio *csio; 6361 6362 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6363 /* Don't wedge the queue */ 6364 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6365 /*run_queue*/TRUE); 6366 } 6367 csio = &done_ccb->csio; 6368 nbuf = (struct scsi_inquiry_data *)csio->data_ptr; 6369 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { 6370 xpt_print(path, 6371 "inquiry data fails comparison at DV%d step\n", 6372 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); 6373 if (proberequestbackoff(periph, path->device)) { 6374 path->device->flags &= ~CAM_DEV_IN_DV; 6375 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION); 6376 } else { 6377 /* give up */ 6378 PROBE_SET_ACTION(softc, PROBE_DV_EXIT); 6379 } 6380 kfree(nbuf, M_CAMXPT); 6381 xpt_release_ccb(done_ccb); 6382 xpt_schedule(periph, priority); 6383 return; 6384 } 6385 kfree(nbuf, M_CAMXPT); 6386 if (softc->action == PROBE_INQUIRY_BASIC_DV1) { 6387 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV2); 6388 xpt_release_ccb(done_ccb); 6389 xpt_schedule(periph, priority); 6390 return; 6391 } 6392 if (softc->action == PROBE_DV_EXIT) { 6393 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6394 ("Leave Domain Validation Successfully\n")); 6395 } 6396 path->device->flags &= 6397 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6398 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6399 /* Inform the XPT that a new device has been found */ 6400 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6401 xpt_action(done_ccb); 6402 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6403 done_ccb); 6404 } 6405 xpt_release_ccb(done_ccb); 6406 break; 6407 } 6408 case PROBE_INVALID: 6409 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_INFO, 6410 ("probedone: invalid action state\n")); 6411 default: 6412 break; 6413 } 6414 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 6415 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 6416 done_ccb->ccb_h.status = CAM_REQ_CMP; 6417 xpt_done(done_ccb); 6418 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 6419 cam_periph_invalidate(periph); 6420 cam_periph_release(periph); 6421 } else { 6422 probeschedule(periph); 6423 } 6424 } 6425 6426 static void 6427 probecleanup(struct cam_periph *periph) 6428 { 6429 kfree(periph->softc, M_CAMXPT); 6430 } 6431 6432 static void 6433 xpt_find_quirk(struct cam_ed *device) 6434 { 6435 caddr_t match; 6436 6437 match = cam_quirkmatch((caddr_t)&device->inq_data, 6438 (caddr_t)xpt_quirk_table, 6439 NELEM(xpt_quirk_table), 6440 sizeof(*xpt_quirk_table), scsi_inquiry_match); 6441 6442 if (match == NULL) 6443 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 6444 6445 device->quirk = (struct xpt_quirk_entry *)match; 6446 } 6447 6448 static int 6449 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) 6450 { 6451 int error, lbool; 6452 6453 lbool = cam_srch_hi; 6454 error = sysctl_handle_int(oidp, &lbool, 0, req); 6455 if (error != 0 || req->newptr == NULL) 6456 return (error); 6457 if (lbool == 0 || lbool == 1) { 6458 cam_srch_hi = lbool; 6459 return (0); 6460 } else { 6461 return (EINVAL); 6462 } 6463 } 6464 6465 static void 6466 xpt_devise_transport(struct cam_path *path) 6467 { 6468 struct ccb_pathinq cpi; 6469 struct ccb_trans_settings cts; 6470 struct scsi_inquiry_data *inq_buf; 6471 6472 /* Get transport information from the SIM */ 6473 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 6474 cpi.ccb_h.func_code = XPT_PATH_INQ; 6475 xpt_action((union ccb *)&cpi); 6476 6477 inq_buf = NULL; 6478 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 6479 inq_buf = &path->device->inq_data; 6480 path->device->protocol = PROTO_SCSI; 6481 path->device->protocol_version = 6482 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 6483 path->device->transport = cpi.transport; 6484 path->device->transport_version = cpi.transport_version; 6485 6486 /* 6487 * Any device not using SPI3 features should 6488 * be considered SPI2 or lower. 6489 */ 6490 if (inq_buf != NULL) { 6491 if (path->device->transport == XPORT_SPI 6492 && (inq_buf->spi3data & SID_SPI_MASK) == 0 6493 && path->device->transport_version > 2) 6494 path->device->transport_version = 2; 6495 } else { 6496 struct cam_ed* otherdev; 6497 6498 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 6499 otherdev != NULL; 6500 otherdev = TAILQ_NEXT(otherdev, links)) { 6501 if (otherdev != path->device) 6502 break; 6503 } 6504 6505 if (otherdev != NULL) { 6506 /* 6507 * Initially assume the same versioning as 6508 * prior luns for this target. 6509 */ 6510 path->device->protocol_version = 6511 otherdev->protocol_version; 6512 path->device->transport_version = 6513 otherdev->transport_version; 6514 } else { 6515 /* Until we know better, opt for safty */ 6516 path->device->protocol_version = 2; 6517 if (path->device->transport == XPORT_SPI) 6518 path->device->transport_version = 2; 6519 else 6520 path->device->transport_version = 0; 6521 } 6522 } 6523 6524 /* 6525 * XXX 6526 * For a device compliant with SPC-2 we should be able 6527 * to determine the transport version supported by 6528 * scrutinizing the version descriptors in the 6529 * inquiry buffer. 6530 */ 6531 6532 /* Tell the controller what we think */ 6533 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 6534 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6535 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6536 cts.transport = path->device->transport; 6537 cts.transport_version = path->device->transport_version; 6538 cts.protocol = path->device->protocol; 6539 cts.protocol_version = path->device->protocol_version; 6540 cts.proto_specific.valid = 0; 6541 cts.xport_specific.valid = 0; 6542 xpt_action((union ccb *)&cts); 6543 } 6544 6545 static void 6546 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6547 int async_update) 6548 { 6549 struct ccb_pathinq cpi; 6550 struct ccb_trans_settings cur_cts; 6551 struct ccb_trans_settings_scsi *scsi; 6552 struct ccb_trans_settings_scsi *cur_scsi; 6553 struct cam_sim *sim; 6554 struct scsi_inquiry_data *inq_data; 6555 6556 if (device == NULL) { 6557 cts->ccb_h.status = CAM_PATH_INVALID; 6558 xpt_done((union ccb *)cts); 6559 return; 6560 } 6561 6562 if (cts->protocol == PROTO_UNKNOWN 6563 || cts->protocol == PROTO_UNSPECIFIED) { 6564 cts->protocol = device->protocol; 6565 cts->protocol_version = device->protocol_version; 6566 } 6567 6568 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 6569 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 6570 cts->protocol_version = device->protocol_version; 6571 6572 if (cts->protocol != device->protocol) { 6573 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", 6574 cts->protocol, device->protocol); 6575 cts->protocol = device->protocol; 6576 } 6577 6578 if (cts->protocol_version > device->protocol_version) { 6579 if (bootverbose) { 6580 xpt_print(cts->ccb_h.path, "Down reving Protocol " 6581 "Version from %d to %d?\n", cts->protocol_version, 6582 device->protocol_version); 6583 } 6584 cts->protocol_version = device->protocol_version; 6585 } 6586 6587 if (cts->transport == XPORT_UNKNOWN 6588 || cts->transport == XPORT_UNSPECIFIED) { 6589 cts->transport = device->transport; 6590 cts->transport_version = device->transport_version; 6591 } 6592 6593 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6594 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6595 cts->transport_version = device->transport_version; 6596 6597 if (cts->transport != device->transport) { 6598 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", 6599 cts->transport, device->transport); 6600 cts->transport = device->transport; 6601 } 6602 6603 if (cts->transport_version > device->transport_version) { 6604 if (bootverbose) { 6605 xpt_print(cts->ccb_h.path, "Down reving Transport " 6606 "Version from %d to %d?\n", cts->transport_version, 6607 device->transport_version); 6608 } 6609 cts->transport_version = device->transport_version; 6610 } 6611 6612 sim = cts->ccb_h.path->bus->sim; 6613 6614 /* 6615 * Nothing more of interest to do unless 6616 * this is a device connected via the 6617 * SCSI protocol. 6618 */ 6619 if (cts->protocol != PROTO_SCSI) { 6620 if (async_update == FALSE) 6621 (*(sim->sim_action))(sim, (union ccb *)cts); 6622 return; 6623 } 6624 6625 inq_data = &device->inq_data; 6626 scsi = &cts->proto_specific.scsi; 6627 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6628 cpi.ccb_h.func_code = XPT_PATH_INQ; 6629 xpt_action((union ccb *)&cpi); 6630 6631 /* SCSI specific sanity checking */ 6632 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6633 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 6634 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6635 || (device->quirk->mintags == 0)) { 6636 /* 6637 * Can't tag on hardware that doesn't support tags, 6638 * doesn't have it enabled, or has broken tag support. 6639 */ 6640 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6641 } 6642 6643 if (async_update == FALSE) { 6644 /* 6645 * Perform sanity checking against what the 6646 * controller and device can do. 6647 */ 6648 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6649 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6650 cur_cts.type = cts->type; 6651 xpt_action((union ccb *)&cur_cts); 6652 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6653 return; 6654 } 6655 cur_scsi = &cur_cts.proto_specific.scsi; 6656 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6657 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6658 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6659 } 6660 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6661 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6662 } 6663 6664 /* SPI specific sanity checking */ 6665 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6666 u_int spi3caps; 6667 struct ccb_trans_settings_spi *spi; 6668 struct ccb_trans_settings_spi *cur_spi; 6669 6670 spi = &cts->xport_specific.spi; 6671 6672 cur_spi = &cur_cts.xport_specific.spi; 6673 6674 /* Fill in any gaps in what the user gave us */ 6675 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6676 spi->sync_period = cur_spi->sync_period; 6677 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6678 spi->sync_period = 0; 6679 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6680 spi->sync_offset = cur_spi->sync_offset; 6681 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6682 spi->sync_offset = 0; 6683 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6684 spi->ppr_options = cur_spi->ppr_options; 6685 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6686 spi->ppr_options = 0; 6687 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6688 spi->bus_width = cur_spi->bus_width; 6689 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6690 spi->bus_width = 0; 6691 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6692 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6693 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6694 } 6695 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6696 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6697 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6698 && (inq_data->flags & SID_Sync) == 0 6699 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6700 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)) { 6701 /* Force async */ 6702 spi->sync_period = 0; 6703 spi->sync_offset = 0; 6704 } 6705 6706 switch (spi->bus_width) { 6707 case MSG_EXT_WDTR_BUS_32_BIT: 6708 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6709 || (inq_data->flags & SID_WBus32) != 0 6710 || cts->type == CTS_TYPE_USER_SETTINGS) 6711 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6712 break; 6713 /* Fall Through to 16-bit */ 6714 case MSG_EXT_WDTR_BUS_16_BIT: 6715 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6716 || (inq_data->flags & SID_WBus16) != 0 6717 || cts->type == CTS_TYPE_USER_SETTINGS) 6718 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6719 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6720 break; 6721 } 6722 /* Fall Through to 8-bit */ 6723 default: /* New bus width?? */ 6724 case MSG_EXT_WDTR_BUS_8_BIT: 6725 /* All targets can do this */ 6726 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6727 break; 6728 } 6729 6730 spi3caps = cpi.xport_specific.spi.ppr_options; 6731 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6732 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6733 spi3caps &= inq_data->spi3data; 6734 6735 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6736 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6737 6738 if ((spi3caps & SID_SPI_IUS) == 0) 6739 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6740 6741 if ((spi3caps & SID_SPI_QAS) == 0) 6742 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6743 6744 /* No SPI Transfer settings are allowed unless we are wide */ 6745 if (spi->bus_width == 0) 6746 spi->ppr_options = 0; 6747 6748 if ((spi->valid & CTS_SPI_VALID_DISC) 6749 && ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0)) { 6750 /* 6751 * Can't tag queue without disconnection. 6752 */ 6753 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6754 scsi->valid |= CTS_SCSI_VALID_TQ; 6755 } 6756 6757 /* 6758 * If we are currently performing tagged transactions to 6759 * this device and want to change its negotiation parameters, 6760 * go non-tagged for a bit to give the controller a chance to 6761 * negotiate unhampered by tag messages. 6762 */ 6763 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6764 && (device->inq_flags & SID_CmdQue) != 0 6765 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6766 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6767 CTS_SPI_VALID_SYNC_OFFSET| 6768 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6769 xpt_toggle_tags(cts->ccb_h.path); 6770 } 6771 6772 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6773 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6774 int device_tagenb; 6775 6776 /* 6777 * If we are transitioning from tags to no-tags or 6778 * vice-versa, we need to carefully freeze and restart 6779 * the queue so that we don't overlap tagged and non-tagged 6780 * commands. We also temporarily stop tags if there is 6781 * a change in transfer negotiation settings to allow 6782 * "tag-less" negotiation. 6783 */ 6784 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6785 || (device->inq_flags & SID_CmdQue) != 0) 6786 device_tagenb = TRUE; 6787 else 6788 device_tagenb = FALSE; 6789 6790 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6791 && device_tagenb == FALSE) 6792 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6793 && device_tagenb == TRUE)) { 6794 6795 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6796 /* 6797 * Delay change to use tags until after a 6798 * few commands have gone to this device so 6799 * the controller has time to perform transfer 6800 * negotiations without tagged messages getting 6801 * in the way. 6802 */ 6803 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6804 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6805 } else { 6806 struct ccb_relsim crs; 6807 6808 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6809 device->inq_flags &= ~SID_CmdQue; 6810 xpt_dev_ccbq_resize(cts->ccb_h.path, 6811 sim->max_dev_openings); 6812 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6813 device->tag_delay_count = 0; 6814 6815 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6816 /*priority*/1); 6817 crs.ccb_h.func_code = XPT_REL_SIMQ; 6818 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6819 crs.openings 6820 = crs.release_timeout 6821 = crs.qfrozen_cnt 6822 = 0; 6823 xpt_action((union ccb *)&crs); 6824 } 6825 } 6826 } 6827 if (async_update == FALSE) 6828 (*(sim->sim_action))(sim, (union ccb *)cts); 6829 } 6830 6831 static void 6832 xpt_toggle_tags(struct cam_path *path) 6833 { 6834 struct cam_ed *dev; 6835 6836 /* 6837 * Give controllers a chance to renegotiate 6838 * before starting tag operations. We 6839 * "toggle" tagged queuing off then on 6840 * which causes the tag enable command delay 6841 * counter to come into effect. 6842 */ 6843 dev = path->device; 6844 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6845 || ((dev->inq_flags & SID_CmdQue) != 0 6846 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6847 struct ccb_trans_settings cts; 6848 6849 xpt_setup_ccb(&cts.ccb_h, path, 1); 6850 cts.protocol = PROTO_SCSI; 6851 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6852 cts.transport = XPORT_UNSPECIFIED; 6853 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6854 cts.proto_specific.scsi.flags = 0; 6855 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6856 xpt_set_transfer_settings(&cts, path->device, 6857 /*async_update*/TRUE); 6858 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6859 xpt_set_transfer_settings(&cts, path->device, 6860 /*async_update*/TRUE); 6861 } 6862 } 6863 6864 static void 6865 xpt_start_tags(struct cam_path *path) 6866 { 6867 struct ccb_relsim crs; 6868 struct cam_ed *device; 6869 struct cam_sim *sim; 6870 int newopenings; 6871 6872 device = path->device; 6873 sim = path->bus->sim; 6874 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6875 xpt_freeze_devq(path, /*count*/1); 6876 device->inq_flags |= SID_CmdQue; 6877 if (device->tag_saved_openings != 0) 6878 newopenings = device->tag_saved_openings; 6879 else 6880 newopenings = min(device->quirk->maxtags, 6881 sim->max_tagged_dev_openings); 6882 xpt_dev_ccbq_resize(path, newopenings); 6883 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6884 crs.ccb_h.func_code = XPT_REL_SIMQ; 6885 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6886 crs.openings 6887 = crs.release_timeout 6888 = crs.qfrozen_cnt 6889 = 0; 6890 xpt_action((union ccb *)&crs); 6891 } 6892 6893 static int busses_to_config; 6894 static int busses_to_reset; 6895 6896 static int 6897 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6898 { 6899 sim_lock_assert_owned(bus->sim->lock); 6900 6901 if (bus->counted_to_config == 0 && bus->path_id != CAM_XPT_PATH_ID) { 6902 struct cam_path path; 6903 struct ccb_pathinq cpi; 6904 int can_negotiate; 6905 6906 if (bootverbose) { 6907 kprintf("CAM: Configuring bus:"); 6908 if (bus->sim) { 6909 kprintf(" %s%d\n", 6910 bus->sim->sim_name, 6911 bus->sim->unit_number); 6912 } else { 6913 kprintf(" (unknown)\n"); 6914 } 6915 } 6916 atomic_add_int(&busses_to_config, 1); 6917 bus->counted_to_config = 1; 6918 xpt_compile_path(&path, NULL, bus->path_id, 6919 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6920 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6921 cpi.ccb_h.func_code = XPT_PATH_INQ; 6922 xpt_action((union ccb *)&cpi); 6923 can_negotiate = cpi.hba_inquiry; 6924 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6925 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 && can_negotiate) 6926 busses_to_reset++; 6927 xpt_release_path(&path); 6928 } else 6929 if (bus->counted_to_config == 0 && bus->path_id == CAM_XPT_PATH_ID) { 6930 /* this is our dummy periph/bus */ 6931 atomic_add_int(&busses_to_config, 1); 6932 bus->counted_to_config = 1; 6933 } 6934 6935 return(1); 6936 } 6937 6938 static int 6939 xptconfigfunc(struct cam_eb *bus, void *arg) 6940 { 6941 struct cam_path *path; 6942 union ccb *work_ccb; 6943 6944 sim_lock_assert_owned(bus->sim->lock); 6945 6946 if (bus->path_id != CAM_XPT_PATH_ID) { 6947 cam_status status; 6948 int can_negotiate; 6949 6950 work_ccb = xpt_alloc_ccb(); 6951 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6952 CAM_TARGET_WILDCARD, 6953 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6954 kprintf("xptconfigfunc: xpt_create_path failed with " 6955 "status %#x for bus %d\n", status, bus->path_id); 6956 kprintf("xptconfigfunc: halting bus configuration\n"); 6957 xpt_free_ccb(work_ccb); 6958 xpt_uncount_bus(bus); 6959 return(0); 6960 } 6961 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6962 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6963 xpt_action(work_ccb); 6964 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6965 kprintf("xptconfigfunc: CPI failed on bus %d " 6966 "with status %d\n", bus->path_id, 6967 work_ccb->ccb_h.status); 6968 xpt_finishconfig(xpt_periph, work_ccb); 6969 return(1); 6970 } 6971 6972 can_negotiate = work_ccb->cpi.hba_inquiry; 6973 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6974 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6975 && (can_negotiate != 0)) { 6976 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6977 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6978 work_ccb->ccb_h.cbfcnp = NULL; 6979 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6980 ("Resetting Bus\n")); 6981 xpt_action(work_ccb); 6982 xpt_finishconfig(xpt_periph, work_ccb); 6983 } else { 6984 /* Act as though we performed a successful BUS RESET */ 6985 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6986 xpt_finishconfig(xpt_periph, work_ccb); 6987 } 6988 } else { 6989 xpt_uncount_bus(bus); 6990 } 6991 6992 return(1); 6993 } 6994 6995 /* 6996 * Now that interrupts are enabled, go find our devices. 6997 * 6998 * This hook function is called once by run_interrupt_driven_config_hooks(). 6999 * XPT is expected to disestablish its hook when done. 7000 */ 7001 static void 7002 xpt_config(void *arg) 7003 { 7004 7005 #ifdef CAMDEBUG 7006 /* Setup debugging flags and path */ 7007 #ifdef CAM_DEBUG_FLAGS 7008 cam_dflags = CAM_DEBUG_FLAGS; 7009 #else /* !CAM_DEBUG_FLAGS */ 7010 cam_dflags = CAM_DEBUG_NONE; 7011 #endif /* CAM_DEBUG_FLAGS */ 7012 #ifdef CAM_DEBUG_BUS 7013 if (cam_dflags != CAM_DEBUG_NONE) { 7014 /* 7015 * Locking is specifically omitted here. No SIMs have 7016 * registered yet, so xpt_create_path will only be searching 7017 * empty lists of targets and devices. 7018 */ 7019 if (xpt_create_path(&cam_dpath, xpt_periph, 7020 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 7021 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 7022 kprintf("xpt_config: xpt_create_path() failed for debug" 7023 " target %d:%d:%d, debugging disabled\n", 7024 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 7025 cam_dflags = CAM_DEBUG_NONE; 7026 } 7027 } else { 7028 cam_dpath = NULL; 7029 } 7030 #else /* !CAM_DEBUG_BUS */ 7031 cam_dpath = NULL; 7032 #endif /* CAM_DEBUG_BUS */ 7033 #endif /* CAMDEBUG */ 7034 7035 /* 7036 * Scan all installed busses. This will also add a count 7037 * for our dummy placeholder (xpt_periph). 7038 */ 7039 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 7040 7041 kprintf("CAM: Configuring %d busses\n", busses_to_config - 1); 7042 if (busses_to_reset > 0 && scsi_delay >= 2000) { 7043 kprintf("Waiting %d seconds for SCSI " 7044 "devices to settle\n", 7045 scsi_delay/1000); 7046 } 7047 xpt_for_all_busses(xptconfigfunc, NULL); 7048 } 7049 7050 /* 7051 * If the given device only has one peripheral attached to it, and if that 7052 * peripheral is the passthrough driver, announce it. This insures that the 7053 * user sees some sort of announcement for every peripheral in their system. 7054 */ 7055 static int 7056 xptpassannouncefunc(struct cam_ed *device, void *arg) 7057 { 7058 struct cam_periph *periph; 7059 int i; 7060 7061 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 7062 periph = SLIST_NEXT(periph, periph_links), i++); 7063 7064 periph = SLIST_FIRST(&device->periphs); 7065 if ((i == 1) 7066 && (strncmp(periph->periph_name, "pass", 4) == 0)) 7067 xpt_announce_periph(periph, NULL); 7068 7069 return(1); 7070 } 7071 7072 static void 7073 xpt_finishconfig_task(void *context, int pending) 7074 { 7075 struct periph_driver **p_drv; 7076 int i; 7077 7078 kprintf("CAM: finished configuring all busses\n"); 7079 7080 if (busses_to_config == 0) { 7081 /* Register all the peripheral drivers */ 7082 /* XXX This will have to change when we have loadable modules */ 7083 p_drv = periph_drivers; 7084 for (i = 0; p_drv[i] != NULL; i++) { 7085 (*p_drv[i]->init)(); 7086 } 7087 7088 /* 7089 * Check for devices with no "standard" peripheral driver 7090 * attached. For any devices like that, announce the 7091 * passthrough driver so the user will see something. 7092 */ 7093 xpt_for_all_devices(xptpassannouncefunc, NULL); 7094 7095 /* Release our hook so that the boot can continue. */ 7096 config_intrhook_disestablish(xsoftc.xpt_config_hook); 7097 kfree(xsoftc.xpt_config_hook, M_CAMXPT); 7098 xsoftc.xpt_config_hook = NULL; 7099 } 7100 kfree(context, M_CAMXPT); 7101 } 7102 7103 static void 7104 xpt_uncount_bus (struct cam_eb *bus) 7105 { 7106 struct xpt_task *task; 7107 7108 if (bus->counted_to_config) { 7109 bus->counted_to_config = 0; 7110 if (atomic_fetchadd_int(&busses_to_config, -1) == 1) { 7111 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 7112 M_INTWAIT | M_ZERO); 7113 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 7114 taskqueue_enqueue(taskqueue_thread[mycpuid], 7115 &task->task); 7116 } 7117 } 7118 } 7119 7120 static void 7121 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 7122 { 7123 struct cam_path *path; 7124 7125 path = done_ccb->ccb_h.path; 7126 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_finishconfig\n")); 7127 7128 switch(done_ccb->ccb_h.func_code) { 7129 case XPT_RESET_BUS: 7130 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 7131 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 7132 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 7133 done_ccb->crcn.flags = 0; 7134 xpt_action(done_ccb); 7135 return; 7136 } 7137 /* FALLTHROUGH */ 7138 case XPT_SCAN_BUS: 7139 default: 7140 if (bootverbose) { 7141 kprintf("CAM: Finished configuring bus:"); 7142 if (path->bus->sim) { 7143 kprintf(" %s%d\n", 7144 path->bus->sim->sim_name, 7145 path->bus->sim->unit_number); 7146 } else { 7147 kprintf(" (unknown)\n"); 7148 } 7149 } 7150 xpt_uncount_bus(path->bus); 7151 xpt_free_path(path); 7152 xpt_free_ccb(done_ccb); 7153 break; 7154 } 7155 } 7156 7157 cam_status 7158 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 7159 struct cam_path *path) 7160 { 7161 struct ccb_setasync csa; 7162 cam_status status; 7163 int xptpath = 0; 7164 7165 if (path == NULL) { 7166 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7167 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 7168 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 7169 if (status != CAM_REQ_CMP) { 7170 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7171 return (status); 7172 } 7173 xptpath = 1; 7174 } 7175 7176 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 7177 csa.ccb_h.func_code = XPT_SASYNC_CB; 7178 csa.event_enable = event; 7179 csa.callback = cbfunc; 7180 csa.callback_arg = cbarg; 7181 xpt_action((union ccb *)&csa); 7182 status = csa.ccb_h.status; 7183 if (xptpath) { 7184 xpt_free_path(path); 7185 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7186 } 7187 return (status); 7188 } 7189 7190 static void 7191 xptaction(struct cam_sim *sim, union ccb *work_ccb) 7192 { 7193 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 7194 7195 switch (work_ccb->ccb_h.func_code) { 7196 /* Common cases first */ 7197 case XPT_PATH_INQ: /* Path routing inquiry */ 7198 { 7199 struct ccb_pathinq *cpi; 7200 7201 cpi = &work_ccb->cpi; 7202 cpi->version_num = 1; /* XXX??? */ 7203 cpi->hba_inquiry = 0; 7204 cpi->target_sprt = 0; 7205 cpi->hba_misc = 0; 7206 cpi->hba_eng_cnt = 0; 7207 cpi->max_target = 0; 7208 cpi->max_lun = 0; 7209 cpi->initiator_id = 0; 7210 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 7211 strncpy(cpi->hba_vid, "", HBA_IDLEN); 7212 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 7213 cpi->unit_number = sim->unit_number; 7214 cpi->bus_id = sim->bus_id; 7215 cpi->base_transfer_speed = 0; 7216 cpi->protocol = PROTO_UNSPECIFIED; 7217 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 7218 cpi->transport = XPORT_UNSPECIFIED; 7219 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 7220 cpi->ccb_h.status = CAM_REQ_CMP; 7221 xpt_done(work_ccb); 7222 break; 7223 } 7224 default: 7225 work_ccb->ccb_h.status = CAM_REQ_INVALID; 7226 xpt_done(work_ccb); 7227 break; 7228 } 7229 } 7230 7231 /* 7232 * The xpt as a "controller" has no interrupt sources, so polling 7233 * is a no-op. 7234 */ 7235 static void 7236 xptpoll(struct cam_sim *sim) 7237 { 7238 } 7239 7240 void 7241 xpt_lock_buses(void) 7242 { 7243 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 7244 } 7245 7246 void 7247 xpt_unlock_buses(void) 7248 { 7249 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 7250 } 7251 7252 7253 /* 7254 * Should only be called by the machine interrupt dispatch routines, 7255 * so put these prototypes here instead of in the header. 7256 */ 7257 7258 static void 7259 swi_cambio(void *arg, void *frame) 7260 { 7261 camisr(NULL); 7262 } 7263 7264 static void 7265 camisr(void *dummy) 7266 { 7267 cam_simq_t queue; 7268 struct cam_sim *sim; 7269 7270 spin_lock(&cam_simq_spin); 7271 TAILQ_INIT(&queue); 7272 TAILQ_CONCAT(&queue, &cam_simq, links); 7273 spin_unlock(&cam_simq_spin); 7274 7275 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 7276 TAILQ_REMOVE(&queue, sim, links); 7277 CAM_SIM_LOCK(sim); 7278 sim->flags &= ~CAM_SIM_ON_DONEQ; 7279 camisr_runqueue(sim); 7280 CAM_SIM_UNLOCK(sim); 7281 } 7282 } 7283 7284 static void 7285 camisr_runqueue(struct cam_sim *sim) 7286 { 7287 struct ccb_hdr *ccb_h; 7288 int runq; 7289 7290 spin_lock(&sim->sim_spin); 7291 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { 7292 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); 7293 spin_unlock(&sim->sim_spin); 7294 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 7295 7296 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 7297 ("camisr\n")); 7298 7299 runq = FALSE; 7300 7301 if (ccb_h->flags & CAM_HIGH_POWER) { 7302 struct highpowerlist *hphead; 7303 union ccb *send_ccb; 7304 7305 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7306 hphead = &xsoftc.highpowerq; 7307 7308 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 7309 7310 /* 7311 * Increment the count since this command is done. 7312 */ 7313 xsoftc.num_highpower++; 7314 7315 /* 7316 * Any high powered commands queued up? 7317 */ 7318 if (send_ccb != NULL) { 7319 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 7320 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7321 7322 xpt_release_devq(send_ccb->ccb_h.path, 7323 /*count*/1, /*runqueue*/TRUE); 7324 } else 7325 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7326 } 7327 7328 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 7329 struct cam_ed *dev; 7330 7331 dev = ccb_h->path->device; 7332 7333 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 7334 7335 /* 7336 * devq may be NULL if this is cam_dead_sim 7337 */ 7338 if (ccb_h->path->bus->sim->devq) { 7339 ccb_h->path->bus->sim->devq->send_active--; 7340 ccb_h->path->bus->sim->devq->send_openings++; 7341 } 7342 7343 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 7344 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 7345 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 7346 && (dev->ccbq.dev_active == 0))) { 7347 7348 xpt_release_devq(ccb_h->path, /*count*/1, 7349 /*run_queue*/TRUE); 7350 } 7351 7352 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 7353 && (--dev->tag_delay_count == 0)) 7354 xpt_start_tags(ccb_h->path); 7355 7356 if ((dev->ccbq.queue.entries > 0) 7357 && (dev->qfrozen_cnt == 0) 7358 && (device_is_send_queued(dev) == 0)) { 7359 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 7360 dev); 7361 } 7362 } 7363 7364 if (ccb_h->status & CAM_RELEASE_SIMQ) { 7365 xpt_release_simq(ccb_h->path->bus->sim, 7366 /*run_queue*/TRUE); 7367 ccb_h->status &= ~CAM_RELEASE_SIMQ; 7368 runq = FALSE; 7369 } 7370 7371 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 7372 && (ccb_h->status & CAM_DEV_QFRZN)) { 7373 xpt_release_devq(ccb_h->path, /*count*/1, 7374 /*run_queue*/TRUE); 7375 ccb_h->status &= ~CAM_DEV_QFRZN; 7376 } else if (runq) { 7377 xpt_run_dev_sendq(ccb_h->path->bus); 7378 } 7379 7380 /* Call the peripheral driver's callback */ 7381 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 7382 spin_lock(&sim->sim_spin); 7383 } 7384 spin_unlock(&sim->sim_spin); 7385 } 7386 7387 /* 7388 * The dead_sim isn't completely hooked into CAM, we have to make sure 7389 * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() 7390 * doesn't block. 7391 */ 7392 static void 7393 dead_sim_action(struct cam_sim *sim, union ccb *ccb) 7394 { 7395 7396 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 7397 xpt_done(ccb); 7398 camisr_runqueue(sim); 7399 } 7400 7401 static void 7402 dead_sim_poll(struct cam_sim *sim) 7403 { 7404 } 7405