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 struct cam_eb *bus; 3148 struct cam_et *tar; 3149 3150 cgd = &start_ccb->cgd; 3151 bus = cgd->ccb_h.path->bus; 3152 tar = cgd->ccb_h.path->target; 3153 cgd->inq_data = dev->inq_data; 3154 cgd->ccb_h.status = CAM_REQ_CMP; 3155 cgd->serial_num_len = dev->serial_num_len; 3156 if ((dev->serial_num_len > 0) 3157 && (dev->serial_num != NULL)) 3158 bcopy(dev->serial_num, cgd->serial_num, 3159 dev->serial_num_len); 3160 } 3161 break; 3162 } 3163 case XPT_GDEV_STATS: 3164 { 3165 struct cam_ed *dev; 3166 3167 dev = start_ccb->ccb_h.path->device; 3168 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3169 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3170 } else { 3171 struct ccb_getdevstats *cgds; 3172 struct cam_eb *bus; 3173 struct cam_et *tar; 3174 3175 cgds = &start_ccb->cgds; 3176 bus = cgds->ccb_h.path->bus; 3177 tar = cgds->ccb_h.path->target; 3178 cgds->dev_openings = dev->ccbq.dev_openings; 3179 cgds->dev_active = dev->ccbq.dev_active; 3180 cgds->devq_openings = dev->ccbq.devq_openings; 3181 cgds->devq_queued = dev->ccbq.queue.entries; 3182 cgds->held = dev->ccbq.held; 3183 cgds->last_reset = tar->last_reset; 3184 cgds->maxtags = dev->quirk->maxtags; 3185 cgds->mintags = dev->quirk->mintags; 3186 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3187 cgds->last_reset = bus->last_reset; 3188 cgds->ccb_h.status = CAM_REQ_CMP; 3189 } 3190 break; 3191 } 3192 case XPT_GDEVLIST: 3193 { 3194 struct cam_periph *nperiph; 3195 struct periph_list *periph_head; 3196 struct ccb_getdevlist *cgdl; 3197 u_int i; 3198 struct cam_ed *device; 3199 int found; 3200 3201 3202 found = 0; 3203 3204 /* 3205 * Don't want anyone mucking with our data. 3206 */ 3207 device = start_ccb->ccb_h.path->device; 3208 periph_head = &device->periphs; 3209 cgdl = &start_ccb->cgdl; 3210 3211 /* 3212 * Check and see if the list has changed since the user 3213 * last requested a list member. If so, tell them that the 3214 * list has changed, and therefore they need to start over 3215 * from the beginning. 3216 */ 3217 if ((cgdl->index != 0) && 3218 (cgdl->generation != device->generation)) { 3219 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3220 break; 3221 } 3222 3223 /* 3224 * Traverse the list of peripherals and attempt to find 3225 * the requested peripheral. 3226 */ 3227 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3228 (nperiph != NULL) && (i <= cgdl->index); 3229 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3230 if (i == cgdl->index) { 3231 strncpy(cgdl->periph_name, 3232 nperiph->periph_name, 3233 DEV_IDLEN); 3234 cgdl->unit_number = nperiph->unit_number; 3235 found = 1; 3236 } 3237 } 3238 if (found == 0) { 3239 cgdl->status = CAM_GDEVLIST_ERROR; 3240 break; 3241 } 3242 3243 if (nperiph == NULL) 3244 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3245 else 3246 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3247 3248 cgdl->index++; 3249 cgdl->generation = device->generation; 3250 3251 cgdl->ccb_h.status = CAM_REQ_CMP; 3252 break; 3253 } 3254 case XPT_DEV_MATCH: 3255 { 3256 dev_pos_type position_type; 3257 struct ccb_dev_match *cdm; 3258 int ret; 3259 3260 cdm = &start_ccb->cdm; 3261 3262 /* 3263 * There are two ways of getting at information in the EDT. 3264 * The first way is via the primary EDT tree. It starts 3265 * with a list of busses, then a list of targets on a bus, 3266 * then devices/luns on a target, and then peripherals on a 3267 * device/lun. The "other" way is by the peripheral driver 3268 * lists. The peripheral driver lists are organized by 3269 * peripheral driver. (obviously) So it makes sense to 3270 * use the peripheral driver list if the user is looking 3271 * for something like "da1", or all "da" devices. If the 3272 * user is looking for something on a particular bus/target 3273 * or lun, it's generally better to go through the EDT tree. 3274 */ 3275 3276 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3277 position_type = cdm->pos.position_type; 3278 else { 3279 u_int i; 3280 3281 position_type = CAM_DEV_POS_NONE; 3282 3283 for (i = 0; i < cdm->num_patterns; i++) { 3284 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3285 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3286 position_type = CAM_DEV_POS_EDT; 3287 break; 3288 } 3289 } 3290 3291 if (cdm->num_patterns == 0) 3292 position_type = CAM_DEV_POS_EDT; 3293 else if (position_type == CAM_DEV_POS_NONE) 3294 position_type = CAM_DEV_POS_PDRV; 3295 } 3296 3297 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3298 case CAM_DEV_POS_EDT: 3299 ret = xptedtmatch(cdm); 3300 break; 3301 case CAM_DEV_POS_PDRV: 3302 ret = xptperiphlistmatch(cdm); 3303 break; 3304 default: 3305 cdm->status = CAM_DEV_MATCH_ERROR; 3306 break; 3307 } 3308 3309 if (cdm->status == CAM_DEV_MATCH_ERROR) 3310 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3311 else 3312 start_ccb->ccb_h.status = CAM_REQ_CMP; 3313 3314 break; 3315 } 3316 case XPT_SASYNC_CB: 3317 { 3318 struct ccb_setasync *csa; 3319 struct async_node *cur_entry; 3320 struct async_list *async_head; 3321 u_int32_t added; 3322 3323 csa = &start_ccb->csa; 3324 added = csa->event_enable; 3325 async_head = &csa->ccb_h.path->device->asyncs; 3326 3327 /* 3328 * If there is already an entry for us, simply 3329 * update it. 3330 */ 3331 cur_entry = SLIST_FIRST(async_head); 3332 while (cur_entry != NULL) { 3333 if ((cur_entry->callback_arg == csa->callback_arg) 3334 && (cur_entry->callback == csa->callback)) 3335 break; 3336 cur_entry = SLIST_NEXT(cur_entry, links); 3337 } 3338 3339 if (cur_entry != NULL) { 3340 /* 3341 * If the request has no flags set, 3342 * remove the entry. 3343 */ 3344 added &= ~cur_entry->event_enable; 3345 if (csa->event_enable == 0) { 3346 SLIST_REMOVE(async_head, cur_entry, 3347 async_node, links); 3348 csa->ccb_h.path->device->refcount--; 3349 kfree(cur_entry, M_CAMXPT); 3350 } else { 3351 cur_entry->event_enable = csa->event_enable; 3352 } 3353 } else { 3354 cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, 3355 M_INTWAIT); 3356 cur_entry->event_enable = csa->event_enable; 3357 cur_entry->callback_arg = csa->callback_arg; 3358 cur_entry->callback = csa->callback; 3359 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3360 csa->ccb_h.path->device->refcount++; 3361 } 3362 3363 /* 3364 * Need to decouple this operation via a taskqueue so that 3365 * the locking doesn't become a mess. 3366 */ 3367 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 3368 struct xpt_task *task; 3369 3370 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 3371 M_INTWAIT); 3372 3373 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 3374 task->data1 = cur_entry; 3375 task->data2 = added; 3376 taskqueue_enqueue(taskqueue_thread[mycpuid], 3377 &task->task); 3378 } 3379 3380 start_ccb->ccb_h.status = CAM_REQ_CMP; 3381 break; 3382 } 3383 case XPT_REL_SIMQ: 3384 { 3385 struct ccb_relsim *crs; 3386 struct cam_ed *dev; 3387 3388 crs = &start_ccb->crs; 3389 dev = crs->ccb_h.path->device; 3390 if (dev == NULL) { 3391 3392 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3393 break; 3394 } 3395 3396 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3397 3398 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 3399 /* Don't ever go below one opening */ 3400 if (crs->openings > 0) { 3401 xpt_dev_ccbq_resize(crs->ccb_h.path, 3402 crs->openings); 3403 3404 if (bootverbose) { 3405 xpt_print(crs->ccb_h.path, 3406 "tagged openings now %d\n", 3407 crs->openings); 3408 } 3409 } 3410 } 3411 } 3412 3413 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3414 3415 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3416 3417 /* 3418 * Just extend the old timeout and decrement 3419 * the freeze count so that a single timeout 3420 * is sufficient for releasing the queue. 3421 */ 3422 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3423 callout_stop(&dev->callout); 3424 } else { 3425 3426 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3427 } 3428 3429 callout_reset(&dev->callout, 3430 (crs->release_timeout * hz) / 1000, 3431 xpt_release_devq_timeout, dev); 3432 3433 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3434 3435 } 3436 3437 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3438 3439 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3440 /* 3441 * Decrement the freeze count so that a single 3442 * completion is still sufficient to unfreeze 3443 * the queue. 3444 */ 3445 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3446 } else { 3447 3448 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3449 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3450 } 3451 } 3452 3453 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3454 3455 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3456 || (dev->ccbq.dev_active == 0)) { 3457 3458 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3459 } else { 3460 3461 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3462 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3463 } 3464 } 3465 3466 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3467 3468 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3469 /*run_queue*/TRUE); 3470 } 3471 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3472 start_ccb->ccb_h.status = CAM_REQ_CMP; 3473 break; 3474 } 3475 case XPT_SCAN_BUS: 3476 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3477 break; 3478 case XPT_SCAN_LUN: 3479 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3480 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3481 start_ccb); 3482 break; 3483 case XPT_DEBUG: { 3484 #ifdef CAMDEBUG 3485 #ifdef CAM_DEBUG_DELAY 3486 cam_debug_delay = CAM_DEBUG_DELAY; 3487 #endif 3488 cam_dflags = start_ccb->cdbg.flags; 3489 if (cam_dpath != NULL) { 3490 xpt_free_path(cam_dpath); 3491 cam_dpath = NULL; 3492 } 3493 3494 if (cam_dflags != CAM_DEBUG_NONE) { 3495 if (xpt_create_path(&cam_dpath, xpt_periph, 3496 start_ccb->ccb_h.path_id, 3497 start_ccb->ccb_h.target_id, 3498 start_ccb->ccb_h.target_lun) != 3499 CAM_REQ_CMP) { 3500 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3501 cam_dflags = CAM_DEBUG_NONE; 3502 } else { 3503 start_ccb->ccb_h.status = CAM_REQ_CMP; 3504 xpt_print(cam_dpath, "debugging flags now %x\n", 3505 cam_dflags); 3506 } 3507 } else { 3508 cam_dpath = NULL; 3509 start_ccb->ccb_h.status = CAM_REQ_CMP; 3510 } 3511 #else /* !CAMDEBUG */ 3512 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3513 #endif /* CAMDEBUG */ 3514 break; 3515 } 3516 case XPT_NOOP: 3517 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3518 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3519 start_ccb->ccb_h.status = CAM_REQ_CMP; 3520 break; 3521 default: 3522 case XPT_SDEV_TYPE: 3523 case XPT_TERM_IO: 3524 case XPT_ENG_INQ: 3525 /* XXX Implement */ 3526 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3527 break; 3528 } 3529 } 3530 3531 void 3532 xpt_polled_action(union ccb *start_ccb) 3533 { 3534 u_int32_t timeout; 3535 struct cam_sim *sim; 3536 struct cam_devq *devq; 3537 struct cam_ed *dev; 3538 3539 timeout = start_ccb->ccb_h.timeout; 3540 sim = start_ccb->ccb_h.path->bus->sim; 3541 devq = sim->devq; 3542 dev = start_ccb->ccb_h.path->device; 3543 3544 sim_lock_assert_owned(sim->lock); 3545 3546 /* 3547 * Steal an opening so that no other queued requests 3548 * can get it before us while we simulate interrupts. 3549 */ 3550 dev->ccbq.devq_openings--; 3551 dev->ccbq.dev_openings--; 3552 3553 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3554 && (--timeout > 0)) { 3555 DELAY(1000); 3556 (*(sim->sim_poll))(sim); 3557 camisr_runqueue(sim); 3558 } 3559 3560 dev->ccbq.devq_openings++; 3561 dev->ccbq.dev_openings++; 3562 3563 if (timeout != 0) { 3564 xpt_action(start_ccb); 3565 while(--timeout > 0) { 3566 (*(sim->sim_poll))(sim); 3567 camisr_runqueue(sim); 3568 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3569 != CAM_REQ_INPROG) 3570 break; 3571 DELAY(1000); 3572 } 3573 if (timeout == 0) { 3574 /* 3575 * XXX Is it worth adding a sim_timeout entry 3576 * point so we can attempt recovery? If 3577 * this is only used for dumps, I don't think 3578 * it is. 3579 */ 3580 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3581 } 3582 } else { 3583 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3584 } 3585 } 3586 3587 /* 3588 * Schedule a peripheral driver to receive a ccb when it's 3589 * target device has space for more transactions. 3590 */ 3591 void 3592 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3593 { 3594 struct cam_ed *device; 3595 union ccb *work_ccb; 3596 int runq; 3597 3598 sim_lock_assert_owned(perph->sim->lock); 3599 3600 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3601 device = perph->path->device; 3602 if (periph_is_queued(perph)) { 3603 /* Simply reorder based on new priority */ 3604 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3605 (" change priority to %d\n", new_priority)); 3606 if (new_priority < perph->pinfo.priority) { 3607 camq_change_priority(&device->drvq, 3608 perph->pinfo.index, 3609 new_priority); 3610 } 3611 runq = 0; 3612 } else if (perph->path->bus->sim == &cam_dead_sim) { 3613 /* The SIM is gone so just call periph_start directly. */ 3614 work_ccb = xpt_get_ccb(perph->path->device); 3615 if (work_ccb == NULL) 3616 return; /* XXX */ 3617 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); 3618 perph->pinfo.priority = new_priority; 3619 perph->periph_start(perph, work_ccb); 3620 return; 3621 } else { 3622 /* New entry on the queue */ 3623 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3624 (" added periph to queue\n")); 3625 perph->pinfo.priority = new_priority; 3626 perph->pinfo.generation = ++device->drvq.generation; 3627 camq_insert(&device->drvq, &perph->pinfo); 3628 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3629 } 3630 if (runq != 0) { 3631 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3632 (" calling xpt_run_devq\n")); 3633 xpt_run_dev_allocq(perph->path->bus); 3634 } 3635 } 3636 3637 3638 /* 3639 * Schedule a device to run on a given queue. 3640 * If the device was inserted as a new entry on the queue, 3641 * return 1 meaning the device queue should be run. If we 3642 * were already queued, implying someone else has already 3643 * started the queue, return 0 so the caller doesn't attempt 3644 * to run the queue. 3645 */ 3646 static int 3647 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3648 u_int32_t new_priority) 3649 { 3650 int retval; 3651 u_int32_t old_priority; 3652 3653 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3654 3655 old_priority = pinfo->priority; 3656 3657 /* 3658 * Are we already queued? 3659 */ 3660 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3661 /* Simply reorder based on new priority */ 3662 if (new_priority < old_priority) { 3663 camq_change_priority(queue, pinfo->index, 3664 new_priority); 3665 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3666 ("changed priority to %d\n", 3667 new_priority)); 3668 } 3669 retval = 0; 3670 } else { 3671 /* New entry on the queue */ 3672 if (new_priority < old_priority) 3673 pinfo->priority = new_priority; 3674 3675 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3676 ("Inserting onto queue\n")); 3677 pinfo->generation = ++queue->generation; 3678 camq_insert(queue, pinfo); 3679 retval = 1; 3680 } 3681 return (retval); 3682 } 3683 3684 static void 3685 xpt_run_dev_allocq(struct cam_eb *bus) 3686 { 3687 struct cam_devq *devq; 3688 3689 if ((devq = bus->sim->devq) == NULL) { 3690 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3691 return; 3692 } 3693 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3694 3695 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3696 (" qfrozen_cnt == 0x%x, entries == %d, " 3697 "openings == %d, active == %d\n", 3698 devq->alloc_queue.qfrozen_cnt, 3699 devq->alloc_queue.entries, 3700 devq->alloc_openings, 3701 devq->alloc_active)); 3702 3703 devq->alloc_queue.qfrozen_cnt++; 3704 while ((devq->alloc_queue.entries > 0) 3705 && (devq->alloc_openings > 0) 3706 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3707 struct cam_ed_qinfo *qinfo; 3708 struct cam_ed *device; 3709 union ccb *work_ccb; 3710 struct cam_periph *drv; 3711 struct camq *drvq; 3712 3713 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3714 CAMQ_HEAD); 3715 device = qinfo->device; 3716 3717 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3718 ("running device %p\n", device)); 3719 3720 drvq = &device->drvq; 3721 3722 #ifdef CAMDEBUG 3723 if (drvq->entries <= 0) { 3724 panic("xpt_run_dev_allocq: " 3725 "Device on queue without any work to do"); 3726 } 3727 #endif 3728 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3729 devq->alloc_openings--; 3730 devq->alloc_active++; 3731 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3732 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3733 drv->pinfo.priority); 3734 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3735 ("calling periph start\n")); 3736 drv->periph_start(drv, work_ccb); 3737 } else { 3738 /* 3739 * Malloc failure in alloc_ccb 3740 */ 3741 /* 3742 * XXX add us to a list to be run from free_ccb 3743 * if we don't have any ccbs active on this 3744 * device queue otherwise we may never get run 3745 * again. 3746 */ 3747 break; 3748 } 3749 3750 if (drvq->entries > 0) { 3751 /* We have more work. Attempt to reschedule */ 3752 xpt_schedule_dev_allocq(bus, device); 3753 } 3754 } 3755 devq->alloc_queue.qfrozen_cnt--; 3756 } 3757 3758 static void 3759 xpt_run_dev_sendq(struct cam_eb *bus) 3760 { 3761 struct cam_devq *devq; 3762 3763 if ((devq = bus->sim->devq) == NULL) { 3764 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3765 return; 3766 } 3767 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3768 3769 devq->send_queue.qfrozen_cnt++; 3770 while ((devq->send_queue.entries > 0) 3771 && (devq->send_openings > 0)) { 3772 struct cam_ed_qinfo *qinfo; 3773 struct cam_ed *device; 3774 union ccb *work_ccb; 3775 struct cam_sim *sim; 3776 3777 if (devq->send_queue.qfrozen_cnt > 1) { 3778 break; 3779 } 3780 3781 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3782 CAMQ_HEAD); 3783 device = qinfo->device; 3784 3785 /* 3786 * If the device has been "frozen", don't attempt 3787 * to run it. 3788 */ 3789 if (device->qfrozen_cnt > 0) { 3790 continue; 3791 } 3792 3793 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3794 ("running device %p\n", device)); 3795 3796 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3797 if (work_ccb == NULL) { 3798 kprintf("device on run queue with no ccbs???\n"); 3799 continue; 3800 } 3801 3802 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3803 3804 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 3805 if (xsoftc.num_highpower <= 0) { 3806 /* 3807 * We got a high power command, but we 3808 * don't have any available slots. Freeze 3809 * the device queue until we have a slot 3810 * available. 3811 */ 3812 device->qfrozen_cnt++; 3813 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3814 &work_ccb->ccb_h, 3815 xpt_links.stqe); 3816 3817 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3818 continue; 3819 } else { 3820 /* 3821 * Consume a high power slot while 3822 * this ccb runs. 3823 */ 3824 xsoftc.num_highpower--; 3825 } 3826 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3827 } 3828 devq->active_dev = device; 3829 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3830 3831 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3832 3833 devq->send_openings--; 3834 devq->send_active++; 3835 3836 if (device->ccbq.queue.entries > 0) 3837 xpt_schedule_dev_sendq(bus, device); 3838 3839 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3840 /* 3841 * The client wants to freeze the queue 3842 * after this CCB is sent. 3843 */ 3844 device->qfrozen_cnt++; 3845 } 3846 3847 /* In Target mode, the peripheral driver knows best... */ 3848 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3849 if ((device->inq_flags & SID_CmdQue) != 0 3850 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3851 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3852 else 3853 /* 3854 * Clear this in case of a retried CCB that 3855 * failed due to a rejected tag. 3856 */ 3857 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3858 } 3859 3860 /* 3861 * Device queues can be shared among multiple sim instances 3862 * that reside on different busses. Use the SIM in the queue 3863 * CCB's path, rather than the one in the bus that was passed 3864 * into this function. 3865 */ 3866 sim = work_ccb->ccb_h.path->bus->sim; 3867 (*(sim->sim_action))(sim, work_ccb); 3868 3869 devq->active_dev = NULL; 3870 } 3871 devq->send_queue.qfrozen_cnt--; 3872 } 3873 3874 /* 3875 * This function merges stuff from the slave ccb into the master ccb, while 3876 * keeping important fields in the master ccb constant. 3877 */ 3878 void 3879 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3880 { 3881 /* 3882 * Pull fields that are valid for peripheral drivers to set 3883 * into the master CCB along with the CCB "payload". 3884 */ 3885 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3886 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3887 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3888 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3889 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3890 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3891 } 3892 3893 void 3894 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3895 { 3896 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3897 callout_init(&ccb_h->timeout_ch); 3898 ccb_h->pinfo.priority = priority; 3899 ccb_h->path = path; 3900 ccb_h->path_id = path->bus->path_id; 3901 if (path->target) 3902 ccb_h->target_id = path->target->target_id; 3903 else 3904 ccb_h->target_id = CAM_TARGET_WILDCARD; 3905 if (path->device) { 3906 ccb_h->target_lun = path->device->lun_id; 3907 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3908 } else { 3909 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3910 } 3911 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3912 ccb_h->flags = 0; 3913 } 3914 3915 /* Path manipulation functions */ 3916 cam_status 3917 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3918 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3919 { 3920 struct cam_path *path; 3921 cam_status status; 3922 3923 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); 3924 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3925 if (status != CAM_REQ_CMP) { 3926 kfree(path, M_CAMXPT); 3927 path = NULL; 3928 } 3929 *new_path_ptr = path; 3930 return (status); 3931 } 3932 3933 cam_status 3934 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3935 struct cam_periph *periph, path_id_t path_id, 3936 target_id_t target_id, lun_id_t lun_id) 3937 { 3938 struct cam_path *path; 3939 struct cam_eb *bus = NULL; 3940 cam_status status; 3941 int need_unlock = 0; 3942 3943 path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3944 3945 if (path_id != CAM_BUS_WILDCARD) { 3946 bus = xpt_find_bus(path_id); 3947 if (bus != NULL) { 3948 need_unlock = 1; 3949 CAM_SIM_LOCK(bus->sim); 3950 } 3951 } 3952 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3953 if (need_unlock) 3954 CAM_SIM_UNLOCK(bus->sim); 3955 if (status != CAM_REQ_CMP) { 3956 kfree(path, M_CAMXPT); 3957 path = NULL; 3958 } 3959 *new_path_ptr = path; 3960 return (status); 3961 } 3962 3963 static cam_status 3964 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3965 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3966 { 3967 struct cam_eb *bus; 3968 struct cam_et *target; 3969 struct cam_ed *device; 3970 cam_status status; 3971 3972 status = CAM_REQ_CMP; /* Completed without error */ 3973 target = NULL; /* Wildcarded */ 3974 device = NULL; /* Wildcarded */ 3975 3976 /* 3977 * We will potentially modify the EDT, so block interrupts 3978 * that may attempt to create cam paths. 3979 */ 3980 bus = xpt_find_bus(path_id); 3981 if (bus == NULL) { 3982 status = CAM_PATH_INVALID; 3983 } else { 3984 target = xpt_find_target(bus, target_id); 3985 if (target == NULL) { 3986 /* Create one */ 3987 struct cam_et *new_target; 3988 3989 new_target = xpt_alloc_target(bus, target_id); 3990 if (new_target == NULL) { 3991 status = CAM_RESRC_UNAVAIL; 3992 } else { 3993 target = new_target; 3994 } 3995 } 3996 if (target != NULL) { 3997 device = xpt_find_device(target, lun_id); 3998 if (device == NULL) { 3999 /* Create one */ 4000 struct cam_ed *new_device; 4001 4002 new_device = xpt_alloc_device(bus, 4003 target, 4004 lun_id); 4005 if (new_device == NULL) { 4006 status = CAM_RESRC_UNAVAIL; 4007 } else { 4008 device = new_device; 4009 } 4010 } 4011 } 4012 } 4013 4014 /* 4015 * Only touch the user's data if we are successful. 4016 */ 4017 if (status == CAM_REQ_CMP) { 4018 new_path->periph = perph; 4019 new_path->bus = bus; 4020 new_path->target = target; 4021 new_path->device = device; 4022 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 4023 } else { 4024 if (device != NULL) 4025 xpt_release_device(bus, target, device); 4026 if (target != NULL) 4027 xpt_release_target(bus, target); 4028 if (bus != NULL) 4029 xpt_release_bus(bus); 4030 } 4031 return (status); 4032 } 4033 4034 static void 4035 xpt_release_path(struct cam_path *path) 4036 { 4037 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 4038 if (path->device != NULL) { 4039 xpt_release_device(path->bus, path->target, path->device); 4040 path->device = NULL; 4041 } 4042 if (path->target != NULL) { 4043 xpt_release_target(path->bus, path->target); 4044 path->target = NULL; 4045 } 4046 if (path->bus != NULL) { 4047 xpt_release_bus(path->bus); 4048 path->bus = NULL; 4049 } 4050 } 4051 4052 void 4053 xpt_free_path(struct cam_path *path) 4054 { 4055 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 4056 xpt_release_path(path); 4057 kfree(path, M_CAMXPT); 4058 } 4059 4060 4061 /* 4062 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 4063 * in path1, 2 for match with wildcards in path2. 4064 */ 4065 int 4066 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 4067 { 4068 int retval = 0; 4069 4070 if (path1->bus != path2->bus) { 4071 if (path1->bus->path_id == CAM_BUS_WILDCARD) 4072 retval = 1; 4073 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 4074 retval = 2; 4075 else 4076 return (-1); 4077 } 4078 if (path1->target != path2->target) { 4079 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 4080 if (retval == 0) 4081 retval = 1; 4082 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 4083 retval = 2; 4084 else 4085 return (-1); 4086 } 4087 if (path1->device != path2->device) { 4088 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4089 if (retval == 0) 4090 retval = 1; 4091 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4092 retval = 2; 4093 else 4094 return (-1); 4095 } 4096 return (retval); 4097 } 4098 4099 void 4100 xpt_print_path(struct cam_path *path) 4101 { 4102 4103 if (path == NULL) 4104 kprintf("(nopath): "); 4105 else { 4106 if (path->periph != NULL) 4107 kprintf("(%s%d:", path->periph->periph_name, 4108 path->periph->unit_number); 4109 else 4110 kprintf("(noperiph:"); 4111 4112 if (path->bus != NULL) 4113 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4114 path->bus->sim->unit_number, 4115 path->bus->sim->bus_id); 4116 else 4117 kprintf("nobus:"); 4118 4119 if (path->target != NULL) 4120 kprintf("%d:", path->target->target_id); 4121 else 4122 kprintf("X:"); 4123 4124 if (path->device != NULL) 4125 kprintf("%d): ", path->device->lun_id); 4126 else 4127 kprintf("X): "); 4128 } 4129 } 4130 4131 void 4132 xpt_print(struct cam_path *path, const char *fmt, ...) 4133 { 4134 __va_list ap; 4135 xpt_print_path(path); 4136 __va_start(ap, fmt); 4137 kvprintf(fmt, ap); 4138 __va_end(ap); 4139 } 4140 4141 int 4142 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4143 { 4144 struct sbuf sb; 4145 4146 sim_lock_assert_owned(path->bus->sim->lock); 4147 4148 sbuf_new(&sb, str, str_len, 0); 4149 4150 if (path == NULL) 4151 sbuf_printf(&sb, "(nopath): "); 4152 else { 4153 if (path->periph != NULL) 4154 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4155 path->periph->unit_number); 4156 else 4157 sbuf_printf(&sb, "(noperiph:"); 4158 4159 if (path->bus != NULL) 4160 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4161 path->bus->sim->unit_number, 4162 path->bus->sim->bus_id); 4163 else 4164 sbuf_printf(&sb, "nobus:"); 4165 4166 if (path->target != NULL) 4167 sbuf_printf(&sb, "%d:", path->target->target_id); 4168 else 4169 sbuf_printf(&sb, "X:"); 4170 4171 if (path->device != NULL) 4172 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4173 else 4174 sbuf_printf(&sb, "X): "); 4175 } 4176 sbuf_finish(&sb); 4177 4178 return(sbuf_len(&sb)); 4179 } 4180 4181 path_id_t 4182 xpt_path_path_id(struct cam_path *path) 4183 { 4184 sim_lock_assert_owned(path->bus->sim->lock); 4185 4186 return(path->bus->path_id); 4187 } 4188 4189 target_id_t 4190 xpt_path_target_id(struct cam_path *path) 4191 { 4192 sim_lock_assert_owned(path->bus->sim->lock); 4193 4194 if (path->target != NULL) 4195 return (path->target->target_id); 4196 else 4197 return (CAM_TARGET_WILDCARD); 4198 } 4199 4200 lun_id_t 4201 xpt_path_lun_id(struct cam_path *path) 4202 { 4203 sim_lock_assert_owned(path->bus->sim->lock); 4204 4205 if (path->device != NULL) 4206 return (path->device->lun_id); 4207 else 4208 return (CAM_LUN_WILDCARD); 4209 } 4210 4211 struct cam_sim * 4212 xpt_path_sim(struct cam_path *path) 4213 { 4214 return (path->bus->sim); 4215 } 4216 4217 struct cam_periph* 4218 xpt_path_periph(struct cam_path *path) 4219 { 4220 sim_lock_assert_owned(path->bus->sim->lock); 4221 4222 return (path->periph); 4223 } 4224 4225 char * 4226 xpt_path_serialno(struct cam_path *path) 4227 { 4228 return (path->device->serial_num); 4229 } 4230 4231 /* 4232 * Release a CAM control block for the caller. Remit the cost of the structure 4233 * to the device referenced by the path. If the this device had no 'credits' 4234 * and peripheral drivers have registered async callbacks for this notification 4235 * call them now. 4236 */ 4237 void 4238 xpt_release_ccb(union ccb *free_ccb) 4239 { 4240 struct cam_path *path; 4241 struct cam_ed *device; 4242 struct cam_eb *bus; 4243 struct cam_sim *sim; 4244 4245 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4246 path = free_ccb->ccb_h.path; 4247 device = path->device; 4248 bus = path->bus; 4249 sim = bus->sim; 4250 4251 sim_lock_assert_owned(sim->lock); 4252 4253 cam_ccbq_release_opening(&device->ccbq); 4254 if (sim->ccb_count > sim->max_ccbs) { 4255 xpt_free_ccb(free_ccb); 4256 sim->ccb_count--; 4257 } else if (sim == &cam_dead_sim) { 4258 xpt_free_ccb(free_ccb); 4259 } else { 4260 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 4261 xpt_links.sle); 4262 } 4263 if (sim->devq == NULL) { 4264 return; 4265 } 4266 sim->devq->alloc_openings++; 4267 sim->devq->alloc_active--; 4268 /* XXX Turn this into an inline function - xpt_run_device?? */ 4269 if ((device_is_alloc_queued(device) == 0) 4270 && (device->drvq.entries > 0)) { 4271 xpt_schedule_dev_allocq(bus, device); 4272 } 4273 if (dev_allocq_is_runnable(sim->devq)) 4274 xpt_run_dev_allocq(bus); 4275 } 4276 4277 /* Functions accessed by SIM drivers */ 4278 4279 /* 4280 * A sim structure, listing the SIM entry points and instance 4281 * identification info is passed to xpt_bus_register to hook the SIM 4282 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4283 * for this new bus and places it in the array of busses and assigns 4284 * it a path_id. The path_id may be influenced by "hard wiring" 4285 * information specified by the user. Once interrupt services are 4286 * availible, the bus will be probed. 4287 */ 4288 int32_t 4289 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4290 { 4291 struct cam_eb *new_bus; 4292 struct cam_eb *old_bus; 4293 struct ccb_pathinq cpi; 4294 4295 sim_lock_assert_owned(sim->lock); 4296 4297 sim->bus_id = bus; 4298 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); 4299 4300 if (strcmp(sim->sim_name, "xpt") != 0) { 4301 sim->path_id = 4302 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4303 } 4304 4305 TAILQ_INIT(&new_bus->et_entries); 4306 new_bus->path_id = sim->path_id; 4307 new_bus->sim = sim; 4308 ++sim->refcount; 4309 timevalclear(&new_bus->last_reset); 4310 new_bus->flags = 0; 4311 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4312 new_bus->generation = 0; 4313 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4314 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4315 while (old_bus != NULL 4316 && old_bus->path_id < new_bus->path_id) 4317 old_bus = TAILQ_NEXT(old_bus, links); 4318 if (old_bus != NULL) 4319 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4320 else 4321 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4322 xsoftc.bus_generation++; 4323 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4324 4325 /* Notify interested parties */ 4326 if (sim->path_id != CAM_XPT_PATH_ID) { 4327 struct cam_path path; 4328 4329 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4330 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4331 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4332 cpi.ccb_h.func_code = XPT_PATH_INQ; 4333 xpt_action((union ccb *)&cpi); 4334 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4335 xpt_release_path(&path); 4336 } 4337 return (CAM_SUCCESS); 4338 } 4339 4340 /* 4341 * Deregister a bus. We must clean out all transactions pending on the bus. 4342 * This routine is typically called prior to cam_sim_free() (e.g. see 4343 * dev/usbmisc/umass/umass.c) 4344 */ 4345 int32_t 4346 xpt_bus_deregister(path_id_t pathid) 4347 { 4348 struct cam_path bus_path; 4349 struct cam_et *target; 4350 struct cam_ed *device; 4351 struct cam_ed_qinfo *qinfo; 4352 struct cam_devq *devq; 4353 struct cam_periph *periph; 4354 struct cam_sim *ccbsim; 4355 union ccb *work_ccb; 4356 cam_status status; 4357 int retries = 0; 4358 4359 status = xpt_compile_path(&bus_path, NULL, pathid, 4360 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4361 if (status != CAM_REQ_CMP) 4362 return (status); 4363 4364 /* 4365 * This should clear out all pending requests and timeouts, but 4366 * the ccb's may be queued to a software interrupt. 4367 * 4368 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4369 * and it really ought to. 4370 */ 4371 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4372 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4373 4374 /* 4375 * Mark the SIM as having been deregistered. This prevents 4376 * certain operations from re-queueing to it, stops new devices 4377 * from being added, etc. 4378 */ 4379 devq = bus_path.bus->sim->devq; 4380 ccbsim = bus_path.bus->sim; 4381 ccbsim->flags |= CAM_SIM_DEREGISTERED; 4382 4383 again: 4384 /* 4385 * Execute any pending operations now. 4386 */ 4387 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 4388 CAMQ_HEAD)) != NULL || 4389 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 4390 CAMQ_HEAD)) != NULL) { 4391 do { 4392 device = qinfo->device; 4393 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 4394 if (work_ccb != NULL) { 4395 devq->active_dev = device; 4396 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 4397 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 4398 (*(ccbsim->sim_action))(ccbsim, work_ccb); 4399 } 4400 4401 periph = (struct cam_periph *)camq_remove(&device->drvq, 4402 CAMQ_HEAD); 4403 if (periph != NULL) 4404 xpt_schedule(periph, periph->pinfo.priority); 4405 } while (work_ccb != NULL || periph != NULL); 4406 } 4407 4408 /* 4409 * Make sure all completed CCBs are processed. 4410 */ 4411 while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { 4412 camisr_runqueue(ccbsim); 4413 } 4414 4415 /* 4416 * Check for requeues, reissues asyncs if necessary 4417 */ 4418 if (CAMQ_GET_HEAD(&devq->send_queue)) 4419 kprintf("camq: devq send_queue still in use (%d entries)\n", 4420 devq->send_queue.entries); 4421 if (CAMQ_GET_HEAD(&devq->alloc_queue)) 4422 kprintf("camq: devq alloc_queue still in use (%d entries)\n", 4423 devq->alloc_queue.entries); 4424 if (CAMQ_GET_HEAD(&devq->send_queue) || 4425 CAMQ_GET_HEAD(&devq->alloc_queue)) { 4426 if (++retries < 5) { 4427 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4428 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4429 goto again; 4430 } 4431 } 4432 4433 /* 4434 * Retarget the bus and all cached sim pointers to dead_sim. 4435 * 4436 * Various CAM subsystems may be holding on to targets, devices, 4437 * and/or peripherals and may attempt to use the sim pointer cached 4438 * in some of these structures during close. 4439 */ 4440 bus_path.bus->sim = &cam_dead_sim; 4441 TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { 4442 TAILQ_FOREACH(device, &target->ed_entries, links) { 4443 device->sim = &cam_dead_sim; 4444 SLIST_FOREACH(periph, &device->periphs, periph_links) { 4445 periph->sim = &cam_dead_sim; 4446 } 4447 } 4448 } 4449 4450 /* 4451 * Repeat the async's for the benefit of any new devices, such as 4452 * might be created from completed probes. Any new device 4453 * ops will run on dead_sim. 4454 * 4455 * XXX There are probably races :-( 4456 */ 4457 CAM_SIM_LOCK(&cam_dead_sim); 4458 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4459 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4460 CAM_SIM_UNLOCK(&cam_dead_sim); 4461 4462 /* Release the reference count held while registered. */ 4463 xpt_release_bus(bus_path.bus); 4464 xpt_release_path(&bus_path); 4465 4466 /* Release the ref we got when the bus was registered */ 4467 cam_sim_release(ccbsim, 0); 4468 4469 return (CAM_REQ_CMP); 4470 } 4471 4472 static path_id_t 4473 xptnextfreepathid(void) 4474 { 4475 struct cam_eb *bus; 4476 path_id_t pathid; 4477 char *strval; 4478 4479 pathid = 0; 4480 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4481 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4482 retry: 4483 /* Find an unoccupied pathid */ 4484 while (bus != NULL && bus->path_id <= pathid) { 4485 if (bus->path_id == pathid) 4486 pathid++; 4487 bus = TAILQ_NEXT(bus, links); 4488 } 4489 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4490 4491 /* 4492 * Ensure that this pathid is not reserved for 4493 * a bus that may be registered in the future. 4494 */ 4495 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4496 ++pathid; 4497 /* Start the search over */ 4498 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4499 goto retry; 4500 } 4501 return (pathid); 4502 } 4503 4504 static path_id_t 4505 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4506 { 4507 path_id_t pathid; 4508 int i, dunit, val; 4509 char buf[32]; 4510 4511 pathid = CAM_XPT_PATH_ID; 4512 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4513 i = -1; 4514 while ((i = resource_query_string(i, "at", buf)) != -1) { 4515 if (strcmp(resource_query_name(i), "scbus")) { 4516 /* Avoid a bit of foot shooting. */ 4517 continue; 4518 } 4519 dunit = resource_query_unit(i); 4520 if (dunit < 0) /* unwired?! */ 4521 continue; 4522 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4523 if (sim_bus == val) { 4524 pathid = dunit; 4525 break; 4526 } 4527 } else if (sim_bus == 0) { 4528 /* Unspecified matches bus 0 */ 4529 pathid = dunit; 4530 break; 4531 } else { 4532 kprintf("Ambiguous scbus configuration for %s%d " 4533 "bus %d, cannot wire down. The kernel " 4534 "config entry for scbus%d should " 4535 "specify a controller bus.\n" 4536 "Scbus will be assigned dynamically.\n", 4537 sim_name, sim_unit, sim_bus, dunit); 4538 break; 4539 } 4540 } 4541 4542 if (pathid == CAM_XPT_PATH_ID) 4543 pathid = xptnextfreepathid(); 4544 return (pathid); 4545 } 4546 4547 void 4548 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4549 { 4550 struct cam_eb *bus; 4551 struct cam_et *target, *next_target; 4552 struct cam_ed *device, *next_device; 4553 4554 sim_lock_assert_owned(path->bus->sim->lock); 4555 4556 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4557 4558 /* 4559 * Most async events come from a CAM interrupt context. In 4560 * a few cases, the error recovery code at the peripheral layer, 4561 * which may run from our SWI or a process context, may signal 4562 * deferred events with a call to xpt_async. 4563 */ 4564 4565 bus = path->bus; 4566 4567 if (async_code == AC_BUS_RESET) { 4568 /* Update our notion of when the last reset occurred */ 4569 microuptime(&bus->last_reset); 4570 } 4571 4572 for (target = TAILQ_FIRST(&bus->et_entries); 4573 target != NULL; 4574 target = next_target) { 4575 4576 next_target = TAILQ_NEXT(target, links); 4577 4578 if (path->target != target 4579 && path->target->target_id != CAM_TARGET_WILDCARD 4580 && target->target_id != CAM_TARGET_WILDCARD) 4581 continue; 4582 4583 if (async_code == AC_SENT_BDR) { 4584 /* Update our notion of when the last reset occurred */ 4585 microuptime(&path->target->last_reset); 4586 } 4587 4588 for (device = TAILQ_FIRST(&target->ed_entries); 4589 device != NULL; 4590 device = next_device) { 4591 4592 next_device = TAILQ_NEXT(device, links); 4593 4594 if (path->device != device 4595 && path->device->lun_id != CAM_LUN_WILDCARD 4596 && device->lun_id != CAM_LUN_WILDCARD) 4597 continue; 4598 4599 xpt_dev_async(async_code, bus, target, 4600 device, async_arg); 4601 4602 xpt_async_bcast(&device->asyncs, async_code, 4603 path, async_arg); 4604 } 4605 } 4606 4607 /* 4608 * If this wasn't a fully wildcarded async, tell all 4609 * clients that want all async events. 4610 */ 4611 if (bus != xpt_periph->path->bus) 4612 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4613 path, async_arg); 4614 } 4615 4616 static void 4617 xpt_async_bcast(struct async_list *async_head, 4618 u_int32_t async_code, 4619 struct cam_path *path, void *async_arg) 4620 { 4621 struct async_node *cur_entry; 4622 4623 cur_entry = SLIST_FIRST(async_head); 4624 while (cur_entry != NULL) { 4625 struct async_node *next_entry; 4626 /* 4627 * Grab the next list entry before we call the current 4628 * entry's callback. This is because the callback function 4629 * can delete its async callback entry. 4630 */ 4631 next_entry = SLIST_NEXT(cur_entry, links); 4632 if ((cur_entry->event_enable & async_code) != 0) 4633 cur_entry->callback(cur_entry->callback_arg, 4634 async_code, path, 4635 async_arg); 4636 cur_entry = next_entry; 4637 } 4638 } 4639 4640 /* 4641 * Handle any per-device event notifications that require action by the XPT. 4642 */ 4643 static void 4644 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4645 struct cam_ed *device, void *async_arg) 4646 { 4647 cam_status status; 4648 struct cam_path newpath; 4649 4650 /* 4651 * We only need to handle events for real devices. 4652 */ 4653 if (target->target_id == CAM_TARGET_WILDCARD 4654 || device->lun_id == CAM_LUN_WILDCARD) 4655 return; 4656 4657 /* 4658 * We need our own path with wildcards expanded to 4659 * handle certain types of events. 4660 */ 4661 if ((async_code == AC_SENT_BDR) 4662 || (async_code == AC_BUS_RESET) 4663 || (async_code == AC_INQ_CHANGED)) 4664 status = xpt_compile_path(&newpath, NULL, 4665 bus->path_id, 4666 target->target_id, 4667 device->lun_id); 4668 else 4669 status = CAM_REQ_CMP_ERR; 4670 4671 if (status == CAM_REQ_CMP) { 4672 4673 /* 4674 * Allow transfer negotiation to occur in a 4675 * tag free environment. 4676 */ 4677 if (async_code == AC_SENT_BDR 4678 || async_code == AC_BUS_RESET) 4679 xpt_toggle_tags(&newpath); 4680 4681 if (async_code == AC_INQ_CHANGED) { 4682 /* 4683 * We've sent a start unit command, or 4684 * something similar to a device that 4685 * may have caused its inquiry data to 4686 * change. So we re-scan the device to 4687 * refresh the inquiry data for it. 4688 */ 4689 xpt_scan_lun(newpath.periph, &newpath, 4690 CAM_EXPECT_INQ_CHANGE, NULL); 4691 } 4692 xpt_release_path(&newpath); 4693 } else if (async_code == AC_LOST_DEVICE) { 4694 /* 4695 * When we lose a device the device may be about to detach 4696 * the sim, we have to clear out all pending timeouts and 4697 * requests before that happens. 4698 * 4699 * This typically happens most often with USB/UMASS devices. 4700 * 4701 * XXX it would be nice if we could abort the requests 4702 * pertaining to the device. 4703 */ 4704 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4705 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4706 device->flags |= CAM_DEV_UNCONFIGURED; 4707 xpt_release_device(bus, target, device); 4708 } 4709 } else if (async_code == AC_TRANSFER_NEG) { 4710 struct ccb_trans_settings *settings; 4711 4712 settings = (struct ccb_trans_settings *)async_arg; 4713 xpt_set_transfer_settings(settings, device, 4714 /*async_update*/TRUE); 4715 } 4716 } 4717 4718 u_int32_t 4719 xpt_freeze_devq(struct cam_path *path, u_int count) 4720 { 4721 struct ccb_hdr *ccbh; 4722 4723 sim_lock_assert_owned(path->bus->sim->lock); 4724 4725 path->device->qfrozen_cnt += count; 4726 4727 /* 4728 * Mark the last CCB in the queue as needing 4729 * to be requeued if the driver hasn't 4730 * changed it's state yet. This fixes a race 4731 * where a ccb is just about to be queued to 4732 * a controller driver when it's interrupt routine 4733 * freezes the queue. To completly close the 4734 * hole, controller drives must check to see 4735 * if a ccb's status is still CAM_REQ_INPROG 4736 * just before they queue 4737 * the CCB. See ahc_action/ahc_freeze_devq for 4738 * an example. 4739 */ 4740 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4741 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4742 ccbh->status = CAM_REQUEUE_REQ; 4743 return (path->device->qfrozen_cnt); 4744 } 4745 4746 u_int32_t 4747 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4748 { 4749 sim_lock_assert_owned(sim->lock); 4750 4751 if (sim->devq == NULL) 4752 return(count); 4753 sim->devq->send_queue.qfrozen_cnt += count; 4754 if (sim->devq->active_dev != NULL) { 4755 struct ccb_hdr *ccbh; 4756 4757 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4758 ccb_hdr_tailq); 4759 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4760 ccbh->status = CAM_REQUEUE_REQ; 4761 } 4762 return (sim->devq->send_queue.qfrozen_cnt); 4763 } 4764 4765 /* 4766 * Release the device queue after a timeout has expired, typically used to 4767 * introduce a delay before retrying after an I/O error or other problem. 4768 */ 4769 static void 4770 xpt_release_devq_timeout(void *arg) 4771 { 4772 struct cam_ed *device; 4773 4774 device = (struct cam_ed *)arg; 4775 CAM_SIM_LOCK(device->sim); 4776 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4777 CAM_SIM_UNLOCK(device->sim); 4778 } 4779 4780 void 4781 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4782 { 4783 sim_lock_assert_owned(path->bus->sim->lock); 4784 4785 xpt_release_devq_device(path->device, count, run_queue); 4786 } 4787 4788 static void 4789 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4790 { 4791 int rundevq; 4792 4793 rundevq = 0; 4794 4795 if (dev->qfrozen_cnt > 0) { 4796 4797 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4798 dev->qfrozen_cnt -= count; 4799 if (dev->qfrozen_cnt == 0) { 4800 4801 /* 4802 * No longer need to wait for a successful 4803 * command completion. 4804 */ 4805 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4806 4807 /* 4808 * Remove any timeouts that might be scheduled 4809 * to release this queue. 4810 */ 4811 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4812 callout_stop(&dev->callout); 4813 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4814 } 4815 4816 /* 4817 * Now that we are unfrozen schedule the 4818 * device so any pending transactions are 4819 * run. 4820 */ 4821 if ((dev->ccbq.queue.entries > 0) 4822 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4823 && (run_queue != 0)) { 4824 rundevq = 1; 4825 } 4826 } 4827 } 4828 if (rundevq != 0) 4829 xpt_run_dev_sendq(dev->target->bus); 4830 } 4831 4832 void 4833 xpt_release_simq(struct cam_sim *sim, int run_queue) 4834 { 4835 struct camq *sendq; 4836 4837 sim_lock_assert_owned(sim->lock); 4838 4839 if (sim->devq == NULL) 4840 return; 4841 4842 sendq = &(sim->devq->send_queue); 4843 if (sendq->qfrozen_cnt > 0) { 4844 sendq->qfrozen_cnt--; 4845 if (sendq->qfrozen_cnt == 0) { 4846 struct cam_eb *bus; 4847 4848 /* 4849 * If there is a timeout scheduled to release this 4850 * sim queue, remove it. The queue frozen count is 4851 * already at 0. 4852 */ 4853 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4854 callout_stop(&sim->callout); 4855 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4856 } 4857 bus = xpt_find_bus(sim->path_id); 4858 4859 if (run_queue) { 4860 /* 4861 * Now that we are unfrozen run the send queue. 4862 */ 4863 xpt_run_dev_sendq(bus); 4864 } 4865 xpt_release_bus(bus); 4866 } 4867 } 4868 } 4869 4870 void 4871 xpt_done(union ccb *done_ccb) 4872 { 4873 struct cam_sim *sim; 4874 4875 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4876 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4877 /* 4878 * Queue up the request for handling by our SWI handler 4879 * any of the "non-immediate" type of ccbs. 4880 */ 4881 sim = done_ccb->ccb_h.path->bus->sim; 4882 switch (done_ccb->ccb_h.path->periph->type) { 4883 case CAM_PERIPH_BIO: 4884 spin_lock(&sim->sim_spin); 4885 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4886 sim_links.tqe); 4887 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4888 spin_unlock(&sim->sim_spin); 4889 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4890 spin_lock(&cam_simq_spin); 4891 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4892 TAILQ_INSERT_TAIL(&cam_simq, sim, 4893 links); 4894 sim->flags |= CAM_SIM_ON_DONEQ; 4895 } 4896 spin_unlock(&cam_simq_spin); 4897 } 4898 if ((done_ccb->ccb_h.flags & CAM_POLLED) == 0) 4899 setsoftcambio(); 4900 break; 4901 default: 4902 panic("unknown periph type %d", 4903 done_ccb->ccb_h.path->periph->type); 4904 } 4905 } 4906 } 4907 4908 union ccb * 4909 xpt_alloc_ccb(void) 4910 { 4911 union ccb *new_ccb; 4912 4913 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); 4914 return (new_ccb); 4915 } 4916 4917 void 4918 xpt_free_ccb(union ccb *free_ccb) 4919 { 4920 kfree(free_ccb, M_CAMXPT); 4921 } 4922 4923 4924 4925 /* Private XPT functions */ 4926 4927 /* 4928 * Get a CAM control block for the caller. Charge the structure to the device 4929 * referenced by the path. If the this device has no 'credits' then the 4930 * device already has the maximum number of outstanding operations under way 4931 * and we return NULL. If we don't have sufficient resources to allocate more 4932 * ccbs, we also return NULL. 4933 */ 4934 static union ccb * 4935 xpt_get_ccb(struct cam_ed *device) 4936 { 4937 union ccb *new_ccb; 4938 struct cam_sim *sim; 4939 4940 sim = device->sim; 4941 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4942 new_ccb = xpt_alloc_ccb(); 4943 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4944 callout_init(&new_ccb->ccb_h.timeout_ch); 4945 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4946 xpt_links.sle); 4947 sim->ccb_count++; 4948 } 4949 cam_ccbq_take_opening(&device->ccbq); 4950 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4951 return (new_ccb); 4952 } 4953 4954 static void 4955 xpt_release_bus(struct cam_eb *bus) 4956 { 4957 4958 if ((--bus->refcount == 0) 4959 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4960 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4961 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4962 xsoftc.bus_generation++; 4963 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4964 kfree(bus, M_CAMXPT); 4965 } 4966 } 4967 4968 static struct cam_et * 4969 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4970 { 4971 struct cam_et *target; 4972 struct cam_et *cur_target; 4973 4974 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); 4975 4976 TAILQ_INIT(&target->ed_entries); 4977 target->bus = bus; 4978 target->target_id = target_id; 4979 target->refcount = 1; 4980 target->generation = 0; 4981 timevalclear(&target->last_reset); 4982 /* 4983 * Hold a reference to our parent bus so it 4984 * will not go away before we do. 4985 */ 4986 bus->refcount++; 4987 4988 /* Insertion sort into our bus's target list */ 4989 cur_target = TAILQ_FIRST(&bus->et_entries); 4990 while (cur_target != NULL && cur_target->target_id < target_id) 4991 cur_target = TAILQ_NEXT(cur_target, links); 4992 4993 if (cur_target != NULL) { 4994 TAILQ_INSERT_BEFORE(cur_target, target, links); 4995 } else { 4996 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4997 } 4998 bus->generation++; 4999 return (target); 5000 } 5001 5002 static void 5003 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 5004 { 5005 if (target->refcount == 1) { 5006 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 5007 TAILQ_REMOVE(&bus->et_entries, target, links); 5008 bus->generation++; 5009 xpt_release_bus(bus); 5010 KKASSERT(target->refcount == 1); 5011 kfree(target, M_CAMXPT); 5012 } else { 5013 --target->refcount; 5014 } 5015 } 5016 5017 static struct cam_ed * 5018 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 5019 { 5020 struct cam_path path; 5021 struct cam_ed *device; 5022 struct cam_devq *devq; 5023 cam_status status; 5024 5025 /* 5026 * Disallow new devices while trying to deregister a sim 5027 */ 5028 if (bus->sim->flags & CAM_SIM_DEREGISTERED) 5029 return (NULL); 5030 5031 /* 5032 * Make space for us in the device queue on our bus 5033 */ 5034 devq = bus->sim->devq; 5035 if (devq == NULL) 5036 return(NULL); 5037 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 5038 5039 if (status != CAM_REQ_CMP) { 5040 device = NULL; 5041 } else { 5042 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); 5043 } 5044 5045 if (device != NULL) { 5046 struct cam_ed *cur_device; 5047 5048 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 5049 device->alloc_ccb_entry.device = device; 5050 cam_init_pinfo(&device->send_ccb_entry.pinfo); 5051 device->send_ccb_entry.device = device; 5052 device->target = target; 5053 device->lun_id = lun_id; 5054 device->sim = bus->sim; 5055 /* Initialize our queues */ 5056 if (camq_init(&device->drvq, 0) != 0) { 5057 kfree(device, M_CAMXPT); 5058 return (NULL); 5059 } 5060 if (cam_ccbq_init(&device->ccbq, 5061 bus->sim->max_dev_openings) != 0) { 5062 camq_fini(&device->drvq); 5063 kfree(device, M_CAMXPT); 5064 return (NULL); 5065 } 5066 SLIST_INIT(&device->asyncs); 5067 SLIST_INIT(&device->periphs); 5068 device->generation = 0; 5069 device->owner = NULL; 5070 /* 5071 * Take the default quirk entry until we have inquiry 5072 * data and can determine a better quirk to use. 5073 */ 5074 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 5075 bzero(&device->inq_data, sizeof(device->inq_data)); 5076 device->inq_flags = 0; 5077 device->queue_flags = 0; 5078 device->serial_num = NULL; 5079 device->serial_num_len = 0; 5080 device->qfrozen_cnt = 0; 5081 device->flags = CAM_DEV_UNCONFIGURED; 5082 device->tag_delay_count = 0; 5083 device->tag_saved_openings = 0; 5084 device->refcount = 1; 5085 callout_init(&device->callout); 5086 5087 /* 5088 * Hold a reference to our parent target so it 5089 * will not go away before we do. 5090 */ 5091 target->refcount++; 5092 5093 /* 5094 * XXX should be limited by number of CCBs this bus can 5095 * do. 5096 */ 5097 bus->sim->max_ccbs += device->ccbq.devq_openings; 5098 /* Insertion sort into our target's device list */ 5099 cur_device = TAILQ_FIRST(&target->ed_entries); 5100 while (cur_device != NULL && cur_device->lun_id < lun_id) 5101 cur_device = TAILQ_NEXT(cur_device, links); 5102 if (cur_device != NULL) { 5103 TAILQ_INSERT_BEFORE(cur_device, device, links); 5104 } else { 5105 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 5106 } 5107 target->generation++; 5108 if (lun_id != CAM_LUN_WILDCARD) { 5109 xpt_compile_path(&path, 5110 NULL, 5111 bus->path_id, 5112 target->target_id, 5113 lun_id); 5114 xpt_devise_transport(&path); 5115 xpt_release_path(&path); 5116 } 5117 } 5118 return (device); 5119 } 5120 5121 static void 5122 xpt_reference_device(struct cam_ed *device) 5123 { 5124 ++device->refcount; 5125 } 5126 5127 static void 5128 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 5129 struct cam_ed *device) 5130 { 5131 struct cam_devq *devq; 5132 5133 if (device->refcount == 1) { 5134 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 5135 5136 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 5137 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 5138 panic("Removing device while still queued for ccbs"); 5139 5140 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 5141 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 5142 callout_stop(&device->callout); 5143 } 5144 5145 TAILQ_REMOVE(&target->ed_entries, device,links); 5146 target->generation++; 5147 bus->sim->max_ccbs -= device->ccbq.devq_openings; 5148 if ((devq = bus->sim->devq) != NULL) { 5149 /* Release our slot in the devq */ 5150 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 5151 } 5152 camq_fini(&device->drvq); 5153 camq_fini(&device->ccbq.queue); 5154 xpt_release_target(bus, target); 5155 KKASSERT(device->refcount == 1); 5156 kfree(device, M_CAMXPT); 5157 } else { 5158 --device->refcount; 5159 } 5160 } 5161 5162 static u_int32_t 5163 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5164 { 5165 int diff; 5166 int result; 5167 struct cam_ed *dev; 5168 5169 dev = path->device; 5170 5171 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 5172 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5173 if (result == CAM_REQ_CMP && (diff < 0)) { 5174 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 5175 } 5176 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5177 || (dev->inq_flags & SID_CmdQue) != 0) 5178 dev->tag_saved_openings = newopenings; 5179 /* Adjust the global limit */ 5180 dev->sim->max_ccbs += diff; 5181 return (result); 5182 } 5183 5184 static struct cam_eb * 5185 xpt_find_bus(path_id_t path_id) 5186 { 5187 struct cam_eb *bus; 5188 5189 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5190 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 5191 if (bus->path_id == path_id) { 5192 bus->refcount++; 5193 break; 5194 } 5195 } 5196 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5197 return (bus); 5198 } 5199 5200 static struct cam_et * 5201 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5202 { 5203 struct cam_et *target; 5204 5205 TAILQ_FOREACH(target, &bus->et_entries, links) { 5206 if (target->target_id == target_id) { 5207 target->refcount++; 5208 break; 5209 } 5210 } 5211 return (target); 5212 } 5213 5214 static struct cam_ed * 5215 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5216 { 5217 struct cam_ed *device; 5218 5219 TAILQ_FOREACH(device, &target->ed_entries, links) { 5220 if (device->lun_id == lun_id) { 5221 device->refcount++; 5222 break; 5223 } 5224 } 5225 return (device); 5226 } 5227 5228 typedef struct { 5229 union ccb *request_ccb; 5230 struct ccb_pathinq *cpi; 5231 int counter; 5232 } xpt_scan_bus_info; 5233 5234 /* 5235 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5236 * As the scan progresses, xpt_scan_bus is used as the 5237 * callback on completion function. 5238 */ 5239 static void 5240 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5241 { 5242 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5243 ("xpt_scan_bus\n")); 5244 switch (request_ccb->ccb_h.func_code) { 5245 case XPT_SCAN_BUS: 5246 { 5247 xpt_scan_bus_info *scan_info; 5248 union ccb *work_ccb; 5249 struct cam_path *path; 5250 u_int i; 5251 u_int max_target; 5252 u_int initiator_id; 5253 5254 /* Find out the characteristics of the bus */ 5255 work_ccb = xpt_alloc_ccb(); 5256 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5257 request_ccb->ccb_h.pinfo.priority); 5258 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5259 xpt_action(work_ccb); 5260 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5261 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5262 xpt_free_ccb(work_ccb); 5263 xpt_done(request_ccb); 5264 return; 5265 } 5266 5267 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5268 /* 5269 * Can't scan the bus on an adapter that 5270 * cannot perform the initiator role. 5271 */ 5272 request_ccb->ccb_h.status = CAM_REQ_CMP; 5273 xpt_free_ccb(work_ccb); 5274 xpt_done(request_ccb); 5275 return; 5276 } 5277 5278 /* Save some state for use while we probe for devices */ 5279 scan_info = (xpt_scan_bus_info *) 5280 kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); 5281 scan_info->request_ccb = request_ccb; 5282 scan_info->cpi = &work_ccb->cpi; 5283 5284 /* Cache on our stack so we can work asynchronously */ 5285 max_target = scan_info->cpi->max_target; 5286 initiator_id = scan_info->cpi->initiator_id; 5287 5288 5289 /* 5290 * We can scan all targets in parallel, or do it sequentially. 5291 */ 5292 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5293 max_target = 0; 5294 scan_info->counter = 0; 5295 } else { 5296 scan_info->counter = scan_info->cpi->max_target + 1; 5297 if (scan_info->cpi->initiator_id < scan_info->counter) { 5298 scan_info->counter--; 5299 } 5300 } 5301 5302 for (i = 0; i <= max_target; i++) { 5303 cam_status status; 5304 if (i == initiator_id) 5305 continue; 5306 5307 status = xpt_create_path(&path, xpt_periph, 5308 request_ccb->ccb_h.path_id, 5309 i, 0); 5310 if (status != CAM_REQ_CMP) { 5311 kprintf("xpt_scan_bus: xpt_create_path failed" 5312 " with status %#x, bus scan halted\n", 5313 status); 5314 kfree(scan_info, M_CAMXPT); 5315 request_ccb->ccb_h.status = status; 5316 xpt_free_ccb(work_ccb); 5317 xpt_done(request_ccb); 5318 break; 5319 } 5320 work_ccb = xpt_alloc_ccb(); 5321 xpt_setup_ccb(&work_ccb->ccb_h, path, 5322 request_ccb->ccb_h.pinfo.priority); 5323 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5324 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5325 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5326 work_ccb->crcn.flags = request_ccb->crcn.flags; 5327 xpt_action(work_ccb); 5328 } 5329 break; 5330 } 5331 case XPT_SCAN_LUN: 5332 { 5333 cam_status status; 5334 struct cam_path *path; 5335 xpt_scan_bus_info *scan_info; 5336 path_id_t path_id; 5337 target_id_t target_id; 5338 lun_id_t lun_id; 5339 5340 /* Reuse the same CCB to query if a device was really found */ 5341 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5342 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5343 request_ccb->ccb_h.pinfo.priority); 5344 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5345 5346 path_id = request_ccb->ccb_h.path_id; 5347 target_id = request_ccb->ccb_h.target_id; 5348 lun_id = request_ccb->ccb_h.target_lun; 5349 xpt_action(request_ccb); 5350 5351 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5352 struct cam_ed *device; 5353 struct cam_et *target; 5354 int phl; 5355 5356 /* 5357 * If we already probed lun 0 successfully, or 5358 * we have additional configured luns on this 5359 * target that might have "gone away", go onto 5360 * the next lun. 5361 */ 5362 target = request_ccb->ccb_h.path->target; 5363 /* 5364 * We may touch devices that we don't 5365 * hold references too, so ensure they 5366 * don't disappear out from under us. 5367 * The target above is referenced by the 5368 * path in the request ccb. 5369 */ 5370 phl = 0; 5371 device = TAILQ_FIRST(&target->ed_entries); 5372 if (device != NULL) { 5373 phl = CAN_SRCH_HI_SPARSE(device); 5374 if (device->lun_id == 0) 5375 device = TAILQ_NEXT(device, links); 5376 } 5377 if ((lun_id != 0) || (device != NULL)) { 5378 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5379 lun_id++; 5380 } 5381 } else { 5382 struct cam_ed *device; 5383 5384 device = request_ccb->ccb_h.path->device; 5385 5386 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5387 /* Try the next lun */ 5388 if (lun_id < (CAM_SCSI2_MAXLUN-1) 5389 || CAN_SRCH_HI_DENSE(device)) 5390 lun_id++; 5391 } 5392 } 5393 5394 /* 5395 * Free the current request path- we're done with it. 5396 */ 5397 xpt_free_path(request_ccb->ccb_h.path); 5398 5399 /* 5400 * Check to see if we scan any further luns. 5401 */ 5402 if (lun_id == request_ccb->ccb_h.target_lun 5403 || lun_id > scan_info->cpi->max_lun) { 5404 int done; 5405 5406 hop_again: 5407 done = 0; 5408 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5409 scan_info->counter++; 5410 if (scan_info->counter == 5411 scan_info->cpi->initiator_id) { 5412 scan_info->counter++; 5413 } 5414 if (scan_info->counter >= 5415 scan_info->cpi->max_target+1) { 5416 done = 1; 5417 } 5418 } else { 5419 scan_info->counter--; 5420 if (scan_info->counter == 0) { 5421 done = 1; 5422 } 5423 } 5424 if (done) { 5425 xpt_free_ccb(request_ccb); 5426 xpt_free_ccb((union ccb *)scan_info->cpi); 5427 request_ccb = scan_info->request_ccb; 5428 kfree(scan_info, M_CAMXPT); 5429 request_ccb->ccb_h.status = CAM_REQ_CMP; 5430 xpt_done(request_ccb); 5431 break; 5432 } 5433 5434 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { 5435 break; 5436 } 5437 status = xpt_create_path(&path, xpt_periph, 5438 scan_info->request_ccb->ccb_h.path_id, 5439 scan_info->counter, 0); 5440 if (status != CAM_REQ_CMP) { 5441 kprintf("xpt_scan_bus: xpt_create_path failed" 5442 " with status %#x, bus scan halted\n", 5443 status); 5444 xpt_free_ccb(request_ccb); 5445 xpt_free_ccb((union ccb *)scan_info->cpi); 5446 request_ccb = scan_info->request_ccb; 5447 kfree(scan_info, M_CAMXPT); 5448 request_ccb->ccb_h.status = status; 5449 xpt_done(request_ccb); 5450 break; 5451 } 5452 xpt_setup_ccb(&request_ccb->ccb_h, path, 5453 request_ccb->ccb_h.pinfo.priority); 5454 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5455 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5456 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5457 request_ccb->crcn.flags = 5458 scan_info->request_ccb->crcn.flags; 5459 } else { 5460 status = xpt_create_path(&path, xpt_periph, 5461 path_id, target_id, lun_id); 5462 if (status != CAM_REQ_CMP) { 5463 kprintf("xpt_scan_bus: xpt_create_path failed " 5464 "with status %#x, halting LUN scan\n", 5465 status); 5466 goto hop_again; 5467 } 5468 xpt_setup_ccb(&request_ccb->ccb_h, path, 5469 request_ccb->ccb_h.pinfo.priority); 5470 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5471 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5472 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5473 request_ccb->crcn.flags = 5474 scan_info->request_ccb->crcn.flags; 5475 } 5476 xpt_action(request_ccb); 5477 break; 5478 } 5479 default: 5480 break; 5481 } 5482 } 5483 5484 typedef enum { 5485 PROBE_TUR, 5486 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ 5487 PROBE_FULL_INQUIRY, 5488 PROBE_MODE_SENSE, 5489 PROBE_SERIAL_NUM_0, 5490 PROBE_SERIAL_NUM_1, 5491 PROBE_TUR_FOR_NEGOTIATION, 5492 PROBE_INQUIRY_BASIC_DV1, 5493 PROBE_INQUIRY_BASIC_DV2, 5494 PROBE_DV_EXIT 5495 } probe_action; 5496 5497 typedef enum { 5498 PROBE_INQUIRY_CKSUM = 0x01, 5499 PROBE_SERIAL_CKSUM = 0x02, 5500 PROBE_NO_ANNOUNCE = 0x04 5501 } probe_flags; 5502 5503 typedef struct { 5504 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5505 probe_action action; 5506 union ccb saved_ccb; 5507 probe_flags flags; 5508 MD5_CTX context; 5509 u_int8_t digest[16]; 5510 }probe_softc; 5511 5512 static void 5513 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5514 cam_flags flags, union ccb *request_ccb) 5515 { 5516 struct ccb_pathinq cpi; 5517 cam_status status; 5518 struct cam_path *new_path; 5519 struct cam_periph *old_periph; 5520 5521 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5522 ("xpt_scan_lun\n")); 5523 5524 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5525 cpi.ccb_h.func_code = XPT_PATH_INQ; 5526 xpt_action((union ccb *)&cpi); 5527 5528 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5529 if (request_ccb != NULL) { 5530 request_ccb->ccb_h.status = cpi.ccb_h.status; 5531 xpt_done(request_ccb); 5532 } 5533 return; 5534 } 5535 5536 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5537 /* 5538 * Can't scan the bus on an adapter that 5539 * cannot perform the initiator role. 5540 */ 5541 if (request_ccb != NULL) { 5542 request_ccb->ccb_h.status = CAM_REQ_CMP; 5543 xpt_done(request_ccb); 5544 } 5545 return; 5546 } 5547 5548 if (request_ccb == NULL) { 5549 request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); 5550 new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); 5551 status = xpt_compile_path(new_path, xpt_periph, 5552 path->bus->path_id, 5553 path->target->target_id, 5554 path->device->lun_id); 5555 5556 if (status != CAM_REQ_CMP) { 5557 xpt_print(path, "xpt_scan_lun: can't compile path, " 5558 "can't continue\n"); 5559 kfree(request_ccb, M_CAMXPT); 5560 kfree(new_path, M_CAMXPT); 5561 return; 5562 } 5563 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5564 request_ccb->ccb_h.cbfcnp = xptscandone; 5565 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5566 request_ccb->crcn.flags = flags; 5567 } 5568 5569 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5570 probe_softc *softc; 5571 5572 softc = (probe_softc *)old_periph->softc; 5573 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5574 periph_links.tqe); 5575 } else { 5576 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5577 probestart, "probe", 5578 CAM_PERIPH_BIO, 5579 request_ccb->ccb_h.path, NULL, 0, 5580 request_ccb); 5581 5582 if (status != CAM_REQ_CMP) { 5583 xpt_print(path, "xpt_scan_lun: cam_alloc_periph " 5584 "returned an error, can't continue probe\n"); 5585 request_ccb->ccb_h.status = status; 5586 xpt_done(request_ccb); 5587 } 5588 } 5589 } 5590 5591 static void 5592 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5593 { 5594 xpt_release_path(done_ccb->ccb_h.path); 5595 kfree(done_ccb->ccb_h.path, M_CAMXPT); 5596 kfree(done_ccb, M_CAMXPT); 5597 } 5598 5599 static cam_status 5600 proberegister(struct cam_periph *periph, void *arg) 5601 { 5602 union ccb *request_ccb; /* CCB representing the probe request */ 5603 cam_status status; 5604 probe_softc *softc; 5605 5606 request_ccb = (union ccb *)arg; 5607 if (periph == NULL) { 5608 kprintf("proberegister: periph was NULL!!\n"); 5609 return(CAM_REQ_CMP_ERR); 5610 } 5611 5612 if (request_ccb == NULL) { 5613 kprintf("proberegister: no probe CCB, " 5614 "can't register device\n"); 5615 return(CAM_REQ_CMP_ERR); 5616 } 5617 5618 softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); 5619 TAILQ_INIT(&softc->request_ccbs); 5620 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5621 periph_links.tqe); 5622 softc->flags = 0; 5623 periph->softc = softc; 5624 status = cam_periph_acquire(periph); 5625 if (status != CAM_REQ_CMP) { 5626 return (status); 5627 } 5628 5629 5630 /* 5631 * Ensure we've waited at least a bus settle 5632 * delay before attempting to probe the device. 5633 * For HBAs that don't do bus resets, this won't make a difference. 5634 */ 5635 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5636 scsi_delay); 5637 probeschedule(periph); 5638 return(CAM_REQ_CMP); 5639 } 5640 5641 static void 5642 probeschedule(struct cam_periph *periph) 5643 { 5644 struct ccb_pathinq cpi; 5645 union ccb *ccb; 5646 probe_softc *softc; 5647 5648 softc = (probe_softc *)periph->softc; 5649 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5650 5651 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5652 cpi.ccb_h.func_code = XPT_PATH_INQ; 5653 xpt_action((union ccb *)&cpi); 5654 5655 /* 5656 * If a device has gone away and another device, or the same one, 5657 * is back in the same place, it should have a unit attention 5658 * condition pending. It will not report the unit attention in 5659 * response to an inquiry, which may leave invalid transfer 5660 * negotiations in effect. The TUR will reveal the unit attention 5661 * condition. Only send the TUR for lun 0, since some devices 5662 * will get confused by commands other than inquiry to non-existent 5663 * luns. If you think a device has gone away start your scan from 5664 * lun 0. This will insure that any bogus transfer settings are 5665 * invalidated. 5666 * 5667 * If we haven't seen the device before and the controller supports 5668 * some kind of transfer negotiation, negotiate with the first 5669 * sent command if no bus reset was performed at startup. This 5670 * ensures that the device is not confused by transfer negotiation 5671 * settings left over by loader or BIOS action. 5672 */ 5673 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5674 && (ccb->ccb_h.target_lun == 0)) { 5675 softc->action = PROBE_TUR; 5676 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5677 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5678 proberequestdefaultnegotiation(periph); 5679 softc->action = PROBE_INQUIRY; 5680 } else { 5681 softc->action = PROBE_INQUIRY; 5682 } 5683 5684 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5685 softc->flags |= PROBE_NO_ANNOUNCE; 5686 else 5687 softc->flags &= ~PROBE_NO_ANNOUNCE; 5688 5689 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5690 } 5691 5692 static void 5693 probestart(struct cam_periph *periph, union ccb *start_ccb) 5694 { 5695 /* Probe the device that our peripheral driver points to */ 5696 struct ccb_scsiio *csio; 5697 probe_softc *softc; 5698 5699 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5700 5701 softc = (probe_softc *)periph->softc; 5702 csio = &start_ccb->csio; 5703 5704 switch (softc->action) { 5705 case PROBE_TUR: 5706 case PROBE_TUR_FOR_NEGOTIATION: 5707 case PROBE_DV_EXIT: 5708 { 5709 scsi_test_unit_ready(csio, 5710 /*retries*/4, 5711 probedone, 5712 MSG_SIMPLE_Q_TAG, 5713 SSD_FULL_SIZE, 5714 /*timeout*/60000); 5715 break; 5716 } 5717 case PROBE_INQUIRY: 5718 case PROBE_FULL_INQUIRY: 5719 case PROBE_INQUIRY_BASIC_DV1: 5720 case PROBE_INQUIRY_BASIC_DV2: 5721 { 5722 u_int inquiry_len; 5723 struct scsi_inquiry_data *inq_buf; 5724 5725 inq_buf = &periph->path->device->inq_data; 5726 5727 /* 5728 * If the device is currently configured, we calculate an 5729 * MD5 checksum of the inquiry data, and if the serial number 5730 * length is greater than 0, add the serial number data 5731 * into the checksum as well. Once the inquiry and the 5732 * serial number check finish, we attempt to figure out 5733 * whether we still have the same device. 5734 */ 5735 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5736 5737 MD5Init(&softc->context); 5738 MD5Update(&softc->context, (unsigned char *)inq_buf, 5739 sizeof(struct scsi_inquiry_data)); 5740 softc->flags |= PROBE_INQUIRY_CKSUM; 5741 if (periph->path->device->serial_num_len > 0) { 5742 MD5Update(&softc->context, 5743 periph->path->device->serial_num, 5744 periph->path->device->serial_num_len); 5745 softc->flags |= PROBE_SERIAL_CKSUM; 5746 } 5747 MD5Final(softc->digest, &softc->context); 5748 } 5749 5750 if (softc->action == PROBE_INQUIRY) 5751 inquiry_len = SHORT_INQUIRY_LENGTH; 5752 else 5753 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); 5754 5755 /* 5756 * Some parallel SCSI devices fail to send an 5757 * ignore wide residue message when dealing with 5758 * odd length inquiry requests. Round up to be 5759 * safe. 5760 */ 5761 inquiry_len = roundup2(inquiry_len, 2); 5762 5763 if (softc->action == PROBE_INQUIRY_BASIC_DV1 5764 || softc->action == PROBE_INQUIRY_BASIC_DV2) { 5765 inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); 5766 } 5767 scsi_inquiry(csio, 5768 /*retries*/4, 5769 probedone, 5770 MSG_SIMPLE_Q_TAG, 5771 (u_int8_t *)inq_buf, 5772 inquiry_len, 5773 /*evpd*/FALSE, 5774 /*page_code*/0, 5775 SSD_MIN_SIZE, 5776 /*timeout*/60 * 1000); 5777 break; 5778 } 5779 case PROBE_MODE_SENSE: 5780 { 5781 void *mode_buf; 5782 int mode_buf_len; 5783 5784 mode_buf_len = sizeof(struct scsi_mode_header_6) 5785 + sizeof(struct scsi_mode_blk_desc) 5786 + sizeof(struct scsi_control_page); 5787 mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); 5788 scsi_mode_sense(csio, 5789 /*retries*/4, 5790 probedone, 5791 MSG_SIMPLE_Q_TAG, 5792 /*dbd*/FALSE, 5793 SMS_PAGE_CTRL_CURRENT, 5794 SMS_CONTROL_MODE_PAGE, 5795 mode_buf, 5796 mode_buf_len, 5797 SSD_FULL_SIZE, 5798 /*timeout*/60000); 5799 break; 5800 } 5801 case PROBE_SERIAL_NUM_0: 5802 { 5803 struct scsi_vpd_supported_page_list *vpd_list = NULL; 5804 struct cam_ed *device; 5805 5806 device = periph->path->device; 5807 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5808 vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, 5809 M_INTWAIT | M_ZERO); 5810 } 5811 5812 if (vpd_list != NULL) { 5813 scsi_inquiry(csio, 5814 /*retries*/4, 5815 probedone, 5816 MSG_SIMPLE_Q_TAG, 5817 (u_int8_t *)vpd_list, 5818 sizeof(*vpd_list), 5819 /*evpd*/TRUE, 5820 SVPD_SUPPORTED_PAGE_LIST, 5821 SSD_MIN_SIZE, 5822 /*timeout*/60 * 1000); 5823 break; 5824 } 5825 /* 5826 * We'll have to do without, let our probedone 5827 * routine finish up for us. 5828 */ 5829 start_ccb->csio.data_ptr = NULL; 5830 probedone(periph, start_ccb); 5831 return; 5832 } 5833 case PROBE_SERIAL_NUM_1: 5834 { 5835 struct scsi_vpd_unit_serial_number *serial_buf; 5836 struct cam_ed* device; 5837 5838 serial_buf = NULL; 5839 device = periph->path->device; 5840 device->serial_num = NULL; 5841 device->serial_num_len = 0; 5842 5843 serial_buf = (struct scsi_vpd_unit_serial_number *) 5844 kmalloc(sizeof(*serial_buf), M_CAMXPT, 5845 M_INTWAIT | M_ZERO); 5846 scsi_inquiry(csio, 5847 /*retries*/4, 5848 probedone, 5849 MSG_SIMPLE_Q_TAG, 5850 (u_int8_t *)serial_buf, 5851 sizeof(*serial_buf), 5852 /*evpd*/TRUE, 5853 SVPD_UNIT_SERIAL_NUMBER, 5854 SSD_MIN_SIZE, 5855 /*timeout*/60 * 1000); 5856 break; 5857 } 5858 } 5859 xpt_action(start_ccb); 5860 } 5861 5862 static void 5863 proberequestdefaultnegotiation(struct cam_periph *periph) 5864 { 5865 struct ccb_trans_settings cts; 5866 5867 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5868 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5869 cts.type = CTS_TYPE_USER_SETTINGS; 5870 xpt_action((union ccb *)&cts); 5871 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5872 return; 5873 } 5874 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5875 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5876 xpt_action((union ccb *)&cts); 5877 } 5878 5879 /* 5880 * Backoff Negotiation Code- only pertinent for SPI devices. 5881 */ 5882 static int 5883 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) 5884 { 5885 struct ccb_trans_settings cts; 5886 struct ccb_trans_settings_spi *spi; 5887 5888 memset(&cts, 0, sizeof (cts)); 5889 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5890 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5891 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5892 xpt_action((union ccb *)&cts); 5893 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5894 if (bootverbose) { 5895 xpt_print(periph->path, 5896 "failed to get current device settings\n"); 5897 } 5898 return (0); 5899 } 5900 if (cts.transport != XPORT_SPI) { 5901 if (bootverbose) { 5902 xpt_print(periph->path, "not SPI transport\n"); 5903 } 5904 return (0); 5905 } 5906 spi = &cts.xport_specific.spi; 5907 5908 /* 5909 * We cannot renegotiate sync rate if we don't have one. 5910 */ 5911 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { 5912 if (bootverbose) { 5913 xpt_print(periph->path, "no sync rate known\n"); 5914 } 5915 return (0); 5916 } 5917 5918 /* 5919 * We'll assert that we don't have to touch PPR options- the 5920 * SIM will see what we do with period and offset and adjust 5921 * the PPR options as appropriate. 5922 */ 5923 5924 /* 5925 * A sync rate with unknown or zero offset is nonsensical. 5926 * A sync period of zero means Async. 5927 */ 5928 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 5929 || spi->sync_offset == 0 || spi->sync_period == 0) { 5930 if (bootverbose) { 5931 xpt_print(periph->path, "no sync rate available\n"); 5932 } 5933 return (0); 5934 } 5935 5936 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { 5937 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5938 ("hit async: giving up on DV\n")); 5939 return (0); 5940 } 5941 5942 5943 /* 5944 * Jump sync_period up by one, but stop at 5MHz and fall back to Async. 5945 * We don't try to remember 'last' settings to see if the SIM actually 5946 * gets into the speed we want to set. We check on the SIM telling 5947 * us that a requested speed is bad, but otherwise don't try and 5948 * check the speed due to the asynchronous and handshake nature 5949 * of speed setting. 5950 */ 5951 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; 5952 for (;;) { 5953 spi->sync_period++; 5954 if (spi->sync_period >= 0xf) { 5955 spi->sync_period = 0; 5956 spi->sync_offset = 0; 5957 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5958 ("setting to async for DV\n")); 5959 /* 5960 * Once we hit async, we don't want to try 5961 * any more settings. 5962 */ 5963 device->flags |= CAM_DEV_DV_HIT_BOTTOM; 5964 } else if (bootverbose) { 5965 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5966 ("DV: period 0x%x\n", spi->sync_period)); 5967 kprintf("setting period to 0x%x\n", spi->sync_period); 5968 } 5969 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5970 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5971 xpt_action((union ccb *)&cts); 5972 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5973 break; 5974 } 5975 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5976 ("DV: failed to set period 0x%x\n", spi->sync_period)); 5977 if (spi->sync_period == 0) { 5978 return (0); 5979 } 5980 } 5981 return (1); 5982 } 5983 5984 static void 5985 probedone(struct cam_periph *periph, union ccb *done_ccb) 5986 { 5987 probe_softc *softc; 5988 struct cam_path *path; 5989 u_int32_t priority; 5990 5991 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5992 5993 softc = (probe_softc *)periph->softc; 5994 path = done_ccb->ccb_h.path; 5995 priority = done_ccb->ccb_h.pinfo.priority; 5996 5997 switch (softc->action) { 5998 case PROBE_TUR: 5999 { 6000 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6001 6002 if (cam_periph_error(done_ccb, 0, 6003 SF_NO_PRINT, NULL) == ERESTART) 6004 return; 6005 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 6006 /* Don't wedge the queue */ 6007 xpt_release_devq(done_ccb->ccb_h.path, 6008 /*count*/1, 6009 /*run_queue*/TRUE); 6010 } 6011 softc->action = PROBE_INQUIRY; 6012 xpt_release_ccb(done_ccb); 6013 xpt_schedule(periph, priority); 6014 return; 6015 } 6016 case PROBE_INQUIRY: 6017 case PROBE_FULL_INQUIRY: 6018 { 6019 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6020 struct scsi_inquiry_data *inq_buf; 6021 u_int8_t periph_qual; 6022 6023 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 6024 inq_buf = &path->device->inq_data; 6025 6026 periph_qual = SID_QUAL(inq_buf); 6027 6028 switch(periph_qual) { 6029 case SID_QUAL_LU_CONNECTED: 6030 { 6031 u_int8_t len; 6032 6033 /* 6034 * We conservatively request only 6035 * SHORT_INQUIRY_LEN bytes of inquiry 6036 * information during our first try 6037 * at sending an INQUIRY. If the device 6038 * has more information to give, 6039 * perform a second request specifying 6040 * the amount of information the device 6041 * is willing to give. 6042 */ 6043 len = inq_buf->additional_length 6044 + offsetof(struct scsi_inquiry_data, 6045 additional_length) + 1; 6046 if (softc->action == PROBE_INQUIRY 6047 && len > SHORT_INQUIRY_LENGTH) { 6048 softc->action = PROBE_FULL_INQUIRY; 6049 xpt_release_ccb(done_ccb); 6050 xpt_schedule(periph, priority); 6051 return; 6052 } 6053 6054 xpt_find_quirk(path->device); 6055 6056 xpt_devise_transport(path); 6057 if (INQ_DATA_TQ_ENABLED(inq_buf)) 6058 softc->action = PROBE_MODE_SENSE; 6059 else 6060 softc->action = PROBE_SERIAL_NUM_0; 6061 6062 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 6063 xpt_reference_device(path->device); 6064 6065 xpt_release_ccb(done_ccb); 6066 xpt_schedule(periph, priority); 6067 return; 6068 } 6069 default: 6070 break; 6071 } 6072 } else if (cam_periph_error(done_ccb, 0, 6073 done_ccb->ccb_h.target_lun > 0 6074 ? SF_RETRY_UA|SF_QUIET_IR 6075 : SF_RETRY_UA, 6076 &softc->saved_ccb) == ERESTART) { 6077 return; 6078 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6079 /* Don't wedge the queue */ 6080 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6081 /*run_queue*/TRUE); 6082 } 6083 /* 6084 * If we get to this point, we got an error status back 6085 * from the inquiry and the error status doesn't require 6086 * automatically retrying the command. Therefore, the 6087 * inquiry failed. If we had inquiry information before 6088 * for this device, but this latest inquiry command failed, 6089 * the device has probably gone away. If this device isn't 6090 * already marked unconfigured, notify the peripheral 6091 * drivers that this device is no more. 6092 */ 6093 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 6094 /* Send the async notification. */ 6095 xpt_async(AC_LOST_DEVICE, path, NULL); 6096 } 6097 6098 xpt_release_ccb(done_ccb); 6099 break; 6100 } 6101 case PROBE_MODE_SENSE: 6102 { 6103 struct ccb_scsiio *csio; 6104 struct scsi_mode_header_6 *mode_hdr; 6105 6106 csio = &done_ccb->csio; 6107 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 6108 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6109 struct scsi_control_page *page; 6110 u_int8_t *offset; 6111 6112 offset = ((u_int8_t *)&mode_hdr[1]) 6113 + mode_hdr->blk_desc_len; 6114 page = (struct scsi_control_page *)offset; 6115 path->device->queue_flags = page->queue_flags; 6116 } else if (cam_periph_error(done_ccb, 0, 6117 SF_RETRY_UA|SF_NO_PRINT, 6118 &softc->saved_ccb) == ERESTART) { 6119 return; 6120 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6121 /* Don't wedge the queue */ 6122 xpt_release_devq(done_ccb->ccb_h.path, 6123 /*count*/1, /*run_queue*/TRUE); 6124 } 6125 xpt_release_ccb(done_ccb); 6126 kfree(mode_hdr, M_CAMXPT); 6127 softc->action = PROBE_SERIAL_NUM_0; 6128 xpt_schedule(periph, priority); 6129 return; 6130 } 6131 case PROBE_SERIAL_NUM_0: 6132 { 6133 struct ccb_scsiio *csio; 6134 struct scsi_vpd_supported_page_list *page_list; 6135 int length, serialnum_supported, i; 6136 6137 serialnum_supported = 0; 6138 csio = &done_ccb->csio; 6139 page_list = 6140 (struct scsi_vpd_supported_page_list *)csio->data_ptr; 6141 6142 if (page_list == NULL) { 6143 /* 6144 * Don't process the command as it was never sent 6145 */ 6146 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6147 && (page_list->length > 0)) { 6148 length = min(page_list->length, 6149 SVPD_SUPPORTED_PAGES_SIZE); 6150 for (i = 0; i < length; i++) { 6151 if (page_list->list[i] == 6152 SVPD_UNIT_SERIAL_NUMBER) { 6153 serialnum_supported = 1; 6154 break; 6155 } 6156 } 6157 } else if (cam_periph_error(done_ccb, 0, 6158 SF_RETRY_UA|SF_NO_PRINT, 6159 &softc->saved_ccb) == ERESTART) { 6160 return; 6161 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6162 /* Don't wedge the queue */ 6163 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6164 /*run_queue*/TRUE); 6165 } 6166 6167 if (page_list != NULL) 6168 kfree(page_list, M_DEVBUF); 6169 6170 if (serialnum_supported) { 6171 xpt_release_ccb(done_ccb); 6172 softc->action = PROBE_SERIAL_NUM_1; 6173 xpt_schedule(periph, priority); 6174 return; 6175 } 6176 xpt_release_ccb(done_ccb); 6177 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6178 xpt_schedule(periph, done_ccb->ccb_h.pinfo.priority); 6179 return; 6180 } 6181 6182 case PROBE_SERIAL_NUM_1: 6183 { 6184 struct ccb_scsiio *csio; 6185 struct scsi_vpd_unit_serial_number *serial_buf; 6186 u_int32_t priority; 6187 int changed; 6188 int have_serialnum; 6189 6190 changed = 1; 6191 have_serialnum = 0; 6192 csio = &done_ccb->csio; 6193 priority = done_ccb->ccb_h.pinfo.priority; 6194 serial_buf = 6195 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 6196 6197 /* Clean up from previous instance of this device */ 6198 if (path->device->serial_num != NULL) { 6199 kfree(path->device->serial_num, M_CAMXPT); 6200 path->device->serial_num = NULL; 6201 path->device->serial_num_len = 0; 6202 } 6203 6204 if (serial_buf == NULL) { 6205 /* 6206 * Don't process the command as it was never sent 6207 */ 6208 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6209 && (serial_buf->length > 0)) { 6210 6211 have_serialnum = 1; 6212 path->device->serial_num = 6213 kmalloc((serial_buf->length + 1), 6214 M_CAMXPT, M_INTWAIT); 6215 bcopy(serial_buf->serial_num, 6216 path->device->serial_num, 6217 serial_buf->length); 6218 path->device->serial_num_len = serial_buf->length; 6219 path->device->serial_num[serial_buf->length] = '\0'; 6220 } else if (cam_periph_error(done_ccb, 0, 6221 SF_RETRY_UA|SF_NO_PRINT, 6222 &softc->saved_ccb) == ERESTART) { 6223 return; 6224 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6225 /* Don't wedge the queue */ 6226 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6227 /*run_queue*/TRUE); 6228 } 6229 6230 /* 6231 * Let's see if we have seen this device before. 6232 */ 6233 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 6234 MD5_CTX context; 6235 u_int8_t digest[16]; 6236 6237 MD5Init(&context); 6238 6239 MD5Update(&context, 6240 (unsigned char *)&path->device->inq_data, 6241 sizeof(struct scsi_inquiry_data)); 6242 6243 if (have_serialnum) 6244 MD5Update(&context, serial_buf->serial_num, 6245 serial_buf->length); 6246 6247 MD5Final(digest, &context); 6248 if (bcmp(softc->digest, digest, 16) == 0) 6249 changed = 0; 6250 6251 /* 6252 * XXX Do we need to do a TUR in order to ensure 6253 * that the device really hasn't changed??? 6254 */ 6255 if ((changed != 0) 6256 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 6257 xpt_async(AC_LOST_DEVICE, path, NULL); 6258 } 6259 if (serial_buf != NULL) 6260 kfree(serial_buf, M_CAMXPT); 6261 6262 if (changed != 0) { 6263 /* 6264 * Now that we have all the necessary 6265 * information to safely perform transfer 6266 * negotiations... Controllers don't perform 6267 * any negotiation or tagged queuing until 6268 * after the first XPT_SET_TRAN_SETTINGS ccb is 6269 * received. So, on a new device, just retrieve 6270 * the user settings, and set them as the current 6271 * settings to set the device up. 6272 */ 6273 proberequestdefaultnegotiation(periph); 6274 xpt_release_ccb(done_ccb); 6275 6276 /* 6277 * Perform a TUR to allow the controller to 6278 * perform any necessary transfer negotiation. 6279 */ 6280 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6281 xpt_schedule(periph, priority); 6282 return; 6283 } 6284 xpt_release_ccb(done_ccb); 6285 break; 6286 } 6287 case PROBE_TUR_FOR_NEGOTIATION: 6288 case PROBE_DV_EXIT: 6289 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6290 /* Don't wedge the queue */ 6291 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6292 /*run_queue*/TRUE); 6293 } 6294 6295 xpt_reference_device(path->device); 6296 /* 6297 * Do Domain Validation for lun 0 on devices that claim 6298 * to support Synchronous Transfer modes. 6299 */ 6300 if (softc->action == PROBE_TUR_FOR_NEGOTIATION 6301 && done_ccb->ccb_h.target_lun == 0 6302 && (path->device->inq_data.flags & SID_Sync) != 0 6303 && (path->device->flags & CAM_DEV_IN_DV) == 0) { 6304 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6305 ("Begin Domain Validation\n")); 6306 path->device->flags |= CAM_DEV_IN_DV; 6307 xpt_release_ccb(done_ccb); 6308 softc->action = PROBE_INQUIRY_BASIC_DV1; 6309 xpt_schedule(periph, priority); 6310 return; 6311 } 6312 if (softc->action == PROBE_DV_EXIT) { 6313 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6314 ("Leave Domain Validation\n")); 6315 } 6316 path->device->flags &= 6317 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6318 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6319 /* Inform the XPT that a new device has been found */ 6320 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6321 xpt_action(done_ccb); 6322 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6323 done_ccb); 6324 } 6325 xpt_release_ccb(done_ccb); 6326 break; 6327 case PROBE_INQUIRY_BASIC_DV1: 6328 case PROBE_INQUIRY_BASIC_DV2: 6329 { 6330 struct scsi_inquiry_data *nbuf; 6331 struct ccb_scsiio *csio; 6332 6333 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6334 /* Don't wedge the queue */ 6335 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6336 /*run_queue*/TRUE); 6337 } 6338 csio = &done_ccb->csio; 6339 nbuf = (struct scsi_inquiry_data *)csio->data_ptr; 6340 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { 6341 xpt_print(path, 6342 "inquiry data fails comparison at DV%d step\n", 6343 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); 6344 if (proberequestbackoff(periph, path->device)) { 6345 path->device->flags &= ~CAM_DEV_IN_DV; 6346 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6347 } else { 6348 /* give up */ 6349 softc->action = PROBE_DV_EXIT; 6350 } 6351 kfree(nbuf, M_CAMXPT); 6352 xpt_release_ccb(done_ccb); 6353 xpt_schedule(periph, priority); 6354 return; 6355 } 6356 kfree(nbuf, M_CAMXPT); 6357 if (softc->action == PROBE_INQUIRY_BASIC_DV1) { 6358 softc->action = PROBE_INQUIRY_BASIC_DV2; 6359 xpt_release_ccb(done_ccb); 6360 xpt_schedule(periph, priority); 6361 return; 6362 } 6363 if (softc->action == PROBE_DV_EXIT) { 6364 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6365 ("Leave Domain Validation Successfully\n")); 6366 } 6367 path->device->flags &= 6368 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6369 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6370 /* Inform the XPT that a new device has been found */ 6371 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6372 xpt_action(done_ccb); 6373 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6374 done_ccb); 6375 } 6376 xpt_release_ccb(done_ccb); 6377 break; 6378 } 6379 } 6380 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 6381 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 6382 done_ccb->ccb_h.status = CAM_REQ_CMP; 6383 xpt_done(done_ccb); 6384 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 6385 cam_periph_invalidate(periph); 6386 cam_periph_release(periph); 6387 } else { 6388 probeschedule(periph); 6389 } 6390 } 6391 6392 static void 6393 probecleanup(struct cam_periph *periph) 6394 { 6395 kfree(periph->softc, M_CAMXPT); 6396 } 6397 6398 static void 6399 xpt_find_quirk(struct cam_ed *device) 6400 { 6401 caddr_t match; 6402 6403 match = cam_quirkmatch((caddr_t)&device->inq_data, 6404 (caddr_t)xpt_quirk_table, 6405 NELEM(xpt_quirk_table), 6406 sizeof(*xpt_quirk_table), scsi_inquiry_match); 6407 6408 if (match == NULL) 6409 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 6410 6411 device->quirk = (struct xpt_quirk_entry *)match; 6412 } 6413 6414 static int 6415 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) 6416 { 6417 int error, bool; 6418 6419 bool = cam_srch_hi; 6420 error = sysctl_handle_int(oidp, &bool, 0, req); 6421 if (error != 0 || req->newptr == NULL) 6422 return (error); 6423 if (bool == 0 || bool == 1) { 6424 cam_srch_hi = bool; 6425 return (0); 6426 } else { 6427 return (EINVAL); 6428 } 6429 } 6430 6431 static void 6432 xpt_devise_transport(struct cam_path *path) 6433 { 6434 struct ccb_pathinq cpi; 6435 struct ccb_trans_settings cts; 6436 struct scsi_inquiry_data *inq_buf; 6437 6438 /* Get transport information from the SIM */ 6439 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 6440 cpi.ccb_h.func_code = XPT_PATH_INQ; 6441 xpt_action((union ccb *)&cpi); 6442 6443 inq_buf = NULL; 6444 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 6445 inq_buf = &path->device->inq_data; 6446 path->device->protocol = PROTO_SCSI; 6447 path->device->protocol_version = 6448 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 6449 path->device->transport = cpi.transport; 6450 path->device->transport_version = cpi.transport_version; 6451 6452 /* 6453 * Any device not using SPI3 features should 6454 * be considered SPI2 or lower. 6455 */ 6456 if (inq_buf != NULL) { 6457 if (path->device->transport == XPORT_SPI 6458 && (inq_buf->spi3data & SID_SPI_MASK) == 0 6459 && path->device->transport_version > 2) 6460 path->device->transport_version = 2; 6461 } else { 6462 struct cam_ed* otherdev; 6463 6464 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 6465 otherdev != NULL; 6466 otherdev = TAILQ_NEXT(otherdev, links)) { 6467 if (otherdev != path->device) 6468 break; 6469 } 6470 6471 if (otherdev != NULL) { 6472 /* 6473 * Initially assume the same versioning as 6474 * prior luns for this target. 6475 */ 6476 path->device->protocol_version = 6477 otherdev->protocol_version; 6478 path->device->transport_version = 6479 otherdev->transport_version; 6480 } else { 6481 /* Until we know better, opt for safty */ 6482 path->device->protocol_version = 2; 6483 if (path->device->transport == XPORT_SPI) 6484 path->device->transport_version = 2; 6485 else 6486 path->device->transport_version = 0; 6487 } 6488 } 6489 6490 /* 6491 * XXX 6492 * For a device compliant with SPC-2 we should be able 6493 * to determine the transport version supported by 6494 * scrutinizing the version descriptors in the 6495 * inquiry buffer. 6496 */ 6497 6498 /* Tell the controller what we think */ 6499 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 6500 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6501 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6502 cts.transport = path->device->transport; 6503 cts.transport_version = path->device->transport_version; 6504 cts.protocol = path->device->protocol; 6505 cts.protocol_version = path->device->protocol_version; 6506 cts.proto_specific.valid = 0; 6507 cts.xport_specific.valid = 0; 6508 xpt_action((union ccb *)&cts); 6509 } 6510 6511 static void 6512 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6513 int async_update) 6514 { 6515 struct ccb_pathinq cpi; 6516 struct ccb_trans_settings cur_cts; 6517 struct ccb_trans_settings_scsi *scsi; 6518 struct ccb_trans_settings_scsi *cur_scsi; 6519 struct cam_sim *sim; 6520 struct scsi_inquiry_data *inq_data; 6521 6522 if (device == NULL) { 6523 cts->ccb_h.status = CAM_PATH_INVALID; 6524 xpt_done((union ccb *)cts); 6525 return; 6526 } 6527 6528 if (cts->protocol == PROTO_UNKNOWN 6529 || cts->protocol == PROTO_UNSPECIFIED) { 6530 cts->protocol = device->protocol; 6531 cts->protocol_version = device->protocol_version; 6532 } 6533 6534 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 6535 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 6536 cts->protocol_version = device->protocol_version; 6537 6538 if (cts->protocol != device->protocol) { 6539 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", 6540 cts->protocol, device->protocol); 6541 cts->protocol = device->protocol; 6542 } 6543 6544 if (cts->protocol_version > device->protocol_version) { 6545 if (bootverbose) { 6546 xpt_print(cts->ccb_h.path, "Down reving Protocol " 6547 "Version from %d to %d?\n", cts->protocol_version, 6548 device->protocol_version); 6549 } 6550 cts->protocol_version = device->protocol_version; 6551 } 6552 6553 if (cts->transport == XPORT_UNKNOWN 6554 || cts->transport == XPORT_UNSPECIFIED) { 6555 cts->transport = device->transport; 6556 cts->transport_version = device->transport_version; 6557 } 6558 6559 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6560 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6561 cts->transport_version = device->transport_version; 6562 6563 if (cts->transport != device->transport) { 6564 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", 6565 cts->transport, device->transport); 6566 cts->transport = device->transport; 6567 } 6568 6569 if (cts->transport_version > device->transport_version) { 6570 if (bootverbose) { 6571 xpt_print(cts->ccb_h.path, "Down reving Transport " 6572 "Version from %d to %d?\n", cts->transport_version, 6573 device->transport_version); 6574 } 6575 cts->transport_version = device->transport_version; 6576 } 6577 6578 sim = cts->ccb_h.path->bus->sim; 6579 6580 /* 6581 * Nothing more of interest to do unless 6582 * this is a device connected via the 6583 * SCSI protocol. 6584 */ 6585 if (cts->protocol != PROTO_SCSI) { 6586 if (async_update == FALSE) 6587 (*(sim->sim_action))(sim, (union ccb *)cts); 6588 return; 6589 } 6590 6591 inq_data = &device->inq_data; 6592 scsi = &cts->proto_specific.scsi; 6593 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6594 cpi.ccb_h.func_code = XPT_PATH_INQ; 6595 xpt_action((union ccb *)&cpi); 6596 6597 /* SCSI specific sanity checking */ 6598 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6599 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 6600 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6601 || (device->quirk->mintags == 0)) { 6602 /* 6603 * Can't tag on hardware that doesn't support tags, 6604 * doesn't have it enabled, or has broken tag support. 6605 */ 6606 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6607 } 6608 6609 if (async_update == FALSE) { 6610 /* 6611 * Perform sanity checking against what the 6612 * controller and device can do. 6613 */ 6614 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6615 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6616 cur_cts.type = cts->type; 6617 xpt_action((union ccb *)&cur_cts); 6618 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6619 return; 6620 } 6621 cur_scsi = &cur_cts.proto_specific.scsi; 6622 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6623 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6624 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6625 } 6626 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6627 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6628 } 6629 6630 /* SPI specific sanity checking */ 6631 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6632 u_int spi3caps; 6633 struct ccb_trans_settings_spi *spi; 6634 struct ccb_trans_settings_spi *cur_spi; 6635 6636 spi = &cts->xport_specific.spi; 6637 6638 cur_spi = &cur_cts.xport_specific.spi; 6639 6640 /* Fill in any gaps in what the user gave us */ 6641 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6642 spi->sync_period = cur_spi->sync_period; 6643 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6644 spi->sync_period = 0; 6645 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6646 spi->sync_offset = cur_spi->sync_offset; 6647 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6648 spi->sync_offset = 0; 6649 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6650 spi->ppr_options = cur_spi->ppr_options; 6651 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6652 spi->ppr_options = 0; 6653 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6654 spi->bus_width = cur_spi->bus_width; 6655 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6656 spi->bus_width = 0; 6657 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6658 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6659 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6660 } 6661 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6662 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6663 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6664 && (inq_data->flags & SID_Sync) == 0 6665 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6666 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6667 || (spi->sync_offset == 0) 6668 || (spi->sync_period == 0)) { 6669 /* Force async */ 6670 spi->sync_period = 0; 6671 spi->sync_offset = 0; 6672 } 6673 6674 switch (spi->bus_width) { 6675 case MSG_EXT_WDTR_BUS_32_BIT: 6676 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6677 || (inq_data->flags & SID_WBus32) != 0 6678 || cts->type == CTS_TYPE_USER_SETTINGS) 6679 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6680 break; 6681 /* Fall Through to 16-bit */ 6682 case MSG_EXT_WDTR_BUS_16_BIT: 6683 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6684 || (inq_data->flags & SID_WBus16) != 0 6685 || cts->type == CTS_TYPE_USER_SETTINGS) 6686 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6687 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6688 break; 6689 } 6690 /* Fall Through to 8-bit */ 6691 default: /* New bus width?? */ 6692 case MSG_EXT_WDTR_BUS_8_BIT: 6693 /* All targets can do this */ 6694 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6695 break; 6696 } 6697 6698 spi3caps = cpi.xport_specific.spi.ppr_options; 6699 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6700 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6701 spi3caps &= inq_data->spi3data; 6702 6703 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6704 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6705 6706 if ((spi3caps & SID_SPI_IUS) == 0) 6707 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6708 6709 if ((spi3caps & SID_SPI_QAS) == 0) 6710 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6711 6712 /* No SPI Transfer settings are allowed unless we are wide */ 6713 if (spi->bus_width == 0) 6714 spi->ppr_options = 0; 6715 6716 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { 6717 /* 6718 * Can't tag queue without disconnection. 6719 */ 6720 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6721 scsi->valid |= CTS_SCSI_VALID_TQ; 6722 } 6723 6724 /* 6725 * If we are currently performing tagged transactions to 6726 * this device and want to change its negotiation parameters, 6727 * go non-tagged for a bit to give the controller a chance to 6728 * negotiate unhampered by tag messages. 6729 */ 6730 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6731 && (device->inq_flags & SID_CmdQue) != 0 6732 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6733 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6734 CTS_SPI_VALID_SYNC_OFFSET| 6735 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6736 xpt_toggle_tags(cts->ccb_h.path); 6737 } 6738 6739 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6740 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6741 int device_tagenb; 6742 6743 /* 6744 * If we are transitioning from tags to no-tags or 6745 * vice-versa, we need to carefully freeze and restart 6746 * the queue so that we don't overlap tagged and non-tagged 6747 * commands. We also temporarily stop tags if there is 6748 * a change in transfer negotiation settings to allow 6749 * "tag-less" negotiation. 6750 */ 6751 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6752 || (device->inq_flags & SID_CmdQue) != 0) 6753 device_tagenb = TRUE; 6754 else 6755 device_tagenb = FALSE; 6756 6757 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6758 && device_tagenb == FALSE) 6759 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6760 && device_tagenb == TRUE)) { 6761 6762 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6763 /* 6764 * Delay change to use tags until after a 6765 * few commands have gone to this device so 6766 * the controller has time to perform transfer 6767 * negotiations without tagged messages getting 6768 * in the way. 6769 */ 6770 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6771 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6772 } else { 6773 struct ccb_relsim crs; 6774 6775 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6776 device->inq_flags &= ~SID_CmdQue; 6777 xpt_dev_ccbq_resize(cts->ccb_h.path, 6778 sim->max_dev_openings); 6779 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6780 device->tag_delay_count = 0; 6781 6782 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6783 /*priority*/1); 6784 crs.ccb_h.func_code = XPT_REL_SIMQ; 6785 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6786 crs.openings 6787 = crs.release_timeout 6788 = crs.qfrozen_cnt 6789 = 0; 6790 xpt_action((union ccb *)&crs); 6791 } 6792 } 6793 } 6794 if (async_update == FALSE) 6795 (*(sim->sim_action))(sim, (union ccb *)cts); 6796 } 6797 6798 static void 6799 xpt_toggle_tags(struct cam_path *path) 6800 { 6801 struct cam_ed *dev; 6802 6803 /* 6804 * Give controllers a chance to renegotiate 6805 * before starting tag operations. We 6806 * "toggle" tagged queuing off then on 6807 * which causes the tag enable command delay 6808 * counter to come into effect. 6809 */ 6810 dev = path->device; 6811 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6812 || ((dev->inq_flags & SID_CmdQue) != 0 6813 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6814 struct ccb_trans_settings cts; 6815 6816 xpt_setup_ccb(&cts.ccb_h, path, 1); 6817 cts.protocol = PROTO_SCSI; 6818 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6819 cts.transport = XPORT_UNSPECIFIED; 6820 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6821 cts.proto_specific.scsi.flags = 0; 6822 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6823 xpt_set_transfer_settings(&cts, path->device, 6824 /*async_update*/TRUE); 6825 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6826 xpt_set_transfer_settings(&cts, path->device, 6827 /*async_update*/TRUE); 6828 } 6829 } 6830 6831 static void 6832 xpt_start_tags(struct cam_path *path) 6833 { 6834 struct ccb_relsim crs; 6835 struct cam_ed *device; 6836 struct cam_sim *sim; 6837 int newopenings; 6838 6839 device = path->device; 6840 sim = path->bus->sim; 6841 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6842 xpt_freeze_devq(path, /*count*/1); 6843 device->inq_flags |= SID_CmdQue; 6844 if (device->tag_saved_openings != 0) 6845 newopenings = device->tag_saved_openings; 6846 else 6847 newopenings = min(device->quirk->maxtags, 6848 sim->max_tagged_dev_openings); 6849 xpt_dev_ccbq_resize(path, newopenings); 6850 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6851 crs.ccb_h.func_code = XPT_REL_SIMQ; 6852 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6853 crs.openings 6854 = crs.release_timeout 6855 = crs.qfrozen_cnt 6856 = 0; 6857 xpt_action((union ccb *)&crs); 6858 } 6859 6860 static int busses_to_config; 6861 static int busses_to_reset; 6862 6863 static int 6864 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6865 { 6866 sim_lock_assert_owned(bus->sim->lock); 6867 6868 if (bus->counted_to_config == 0 && bus->path_id != CAM_XPT_PATH_ID) { 6869 struct cam_path path; 6870 struct ccb_pathinq cpi; 6871 int can_negotiate; 6872 6873 if (bootverbose) { 6874 kprintf("CAM: Configuring bus:"); 6875 if (bus->sim) { 6876 kprintf(" %s%d\n", 6877 bus->sim->sim_name, 6878 bus->sim->unit_number); 6879 } else { 6880 kprintf(" (unknown)\n"); 6881 } 6882 } 6883 atomic_add_int(&busses_to_config, 1); 6884 bus->counted_to_config = 1; 6885 xpt_compile_path(&path, NULL, bus->path_id, 6886 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6887 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6888 cpi.ccb_h.func_code = XPT_PATH_INQ; 6889 xpt_action((union ccb *)&cpi); 6890 can_negotiate = cpi.hba_inquiry; 6891 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6892 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 && can_negotiate) 6893 busses_to_reset++; 6894 xpt_release_path(&path); 6895 } else 6896 if (bus->counted_to_config == 0 && bus->path_id == CAM_XPT_PATH_ID) { 6897 /* this is our dummy periph/bus */ 6898 atomic_add_int(&busses_to_config, 1); 6899 bus->counted_to_config = 1; 6900 } 6901 6902 return(1); 6903 } 6904 6905 static int 6906 xptconfigfunc(struct cam_eb *bus, void *arg) 6907 { 6908 struct cam_path *path; 6909 union ccb *work_ccb; 6910 6911 sim_lock_assert_owned(bus->sim->lock); 6912 6913 if (bus->path_id != CAM_XPT_PATH_ID) { 6914 cam_status status; 6915 int can_negotiate; 6916 6917 work_ccb = xpt_alloc_ccb(); 6918 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6919 CAM_TARGET_WILDCARD, 6920 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6921 kprintf("xptconfigfunc: xpt_create_path failed with " 6922 "status %#x for bus %d\n", status, bus->path_id); 6923 kprintf("xptconfigfunc: halting bus configuration\n"); 6924 xpt_free_ccb(work_ccb); 6925 xpt_uncount_bus(bus); 6926 return(0); 6927 } 6928 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6929 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6930 xpt_action(work_ccb); 6931 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6932 kprintf("xptconfigfunc: CPI failed on bus %d " 6933 "with status %d\n", bus->path_id, 6934 work_ccb->ccb_h.status); 6935 xpt_finishconfig(xpt_periph, work_ccb); 6936 return(1); 6937 } 6938 6939 can_negotiate = work_ccb->cpi.hba_inquiry; 6940 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6941 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6942 && (can_negotiate != 0)) { 6943 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6944 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6945 work_ccb->ccb_h.cbfcnp = NULL; 6946 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6947 ("Resetting Bus\n")); 6948 xpt_action(work_ccb); 6949 xpt_finishconfig(xpt_periph, work_ccb); 6950 } else { 6951 /* Act as though we performed a successful BUS RESET */ 6952 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6953 xpt_finishconfig(xpt_periph, work_ccb); 6954 } 6955 } else { 6956 xpt_uncount_bus(bus); 6957 } 6958 6959 return(1); 6960 } 6961 6962 /* 6963 * Now that interrupts are enabled, go find our devices. 6964 * 6965 * This hook function is called once by run_interrupt_driven_config_hooks(). 6966 * XPT is expected to disestablish its hook when done. 6967 */ 6968 static void 6969 xpt_config(void *arg) 6970 { 6971 6972 #ifdef CAMDEBUG 6973 /* Setup debugging flags and path */ 6974 #ifdef CAM_DEBUG_FLAGS 6975 cam_dflags = CAM_DEBUG_FLAGS; 6976 #else /* !CAM_DEBUG_FLAGS */ 6977 cam_dflags = CAM_DEBUG_NONE; 6978 #endif /* CAM_DEBUG_FLAGS */ 6979 #ifdef CAM_DEBUG_BUS 6980 if (cam_dflags != CAM_DEBUG_NONE) { 6981 /* 6982 * Locking is specifically omitted here. No SIMs have 6983 * registered yet, so xpt_create_path will only be searching 6984 * empty lists of targets and devices. 6985 */ 6986 if (xpt_create_path(&cam_dpath, xpt_periph, 6987 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6988 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6989 kprintf("xpt_config: xpt_create_path() failed for debug" 6990 " target %d:%d:%d, debugging disabled\n", 6991 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6992 cam_dflags = CAM_DEBUG_NONE; 6993 } 6994 } else { 6995 cam_dpath = NULL; 6996 } 6997 #else /* !CAM_DEBUG_BUS */ 6998 cam_dpath = NULL; 6999 #endif /* CAM_DEBUG_BUS */ 7000 #endif /* CAMDEBUG */ 7001 7002 /* 7003 * Scan all installed busses. This will also add a count 7004 * for our dummy placeholder (xpt_periph). 7005 */ 7006 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 7007 7008 kprintf("CAM: Configuring %d busses\n", busses_to_config - 1); 7009 if (busses_to_reset > 0 && scsi_delay >= 2000) { 7010 kprintf("Waiting %d seconds for SCSI " 7011 "devices to settle\n", 7012 scsi_delay/1000); 7013 } 7014 xpt_for_all_busses(xptconfigfunc, NULL); 7015 } 7016 7017 /* 7018 * If the given device only has one peripheral attached to it, and if that 7019 * peripheral is the passthrough driver, announce it. This insures that the 7020 * user sees some sort of announcement for every peripheral in their system. 7021 */ 7022 static int 7023 xptpassannouncefunc(struct cam_ed *device, void *arg) 7024 { 7025 struct cam_periph *periph; 7026 int i; 7027 7028 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 7029 periph = SLIST_NEXT(periph, periph_links), i++); 7030 7031 periph = SLIST_FIRST(&device->periphs); 7032 if ((i == 1) 7033 && (strncmp(periph->periph_name, "pass", 4) == 0)) 7034 xpt_announce_periph(periph, NULL); 7035 7036 return(1); 7037 } 7038 7039 static void 7040 xpt_finishconfig_task(void *context, int pending) 7041 { 7042 struct periph_driver **p_drv; 7043 int i; 7044 7045 kprintf("CAM: finished configuring all busses\n"); 7046 7047 if (busses_to_config == 0) { 7048 /* Register all the peripheral drivers */ 7049 /* XXX This will have to change when we have loadable modules */ 7050 p_drv = periph_drivers; 7051 for (i = 0; p_drv[i] != NULL; i++) { 7052 (*p_drv[i]->init)(); 7053 } 7054 7055 /* 7056 * Check for devices with no "standard" peripheral driver 7057 * attached. For any devices like that, announce the 7058 * passthrough driver so the user will see something. 7059 */ 7060 xpt_for_all_devices(xptpassannouncefunc, NULL); 7061 7062 /* Release our hook so that the boot can continue. */ 7063 config_intrhook_disestablish(xsoftc.xpt_config_hook); 7064 kfree(xsoftc.xpt_config_hook, M_CAMXPT); 7065 xsoftc.xpt_config_hook = NULL; 7066 } 7067 kfree(context, M_CAMXPT); 7068 } 7069 7070 static void 7071 xpt_uncount_bus (struct cam_eb *bus) 7072 { 7073 struct xpt_task *task; 7074 7075 if (bus->counted_to_config) { 7076 bus->counted_to_config = 0; 7077 if (atomic_fetchadd_int(&busses_to_config, -1) == 1) { 7078 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 7079 M_INTWAIT | M_ZERO); 7080 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 7081 taskqueue_enqueue(taskqueue_thread[mycpuid], 7082 &task->task); 7083 } 7084 } 7085 } 7086 7087 static void 7088 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 7089 { 7090 struct cam_path *path; 7091 7092 path = done_ccb->ccb_h.path; 7093 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_finishconfig\n")); 7094 7095 switch(done_ccb->ccb_h.func_code) { 7096 case XPT_RESET_BUS: 7097 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 7098 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 7099 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 7100 done_ccb->crcn.flags = 0; 7101 xpt_action(done_ccb); 7102 return; 7103 } 7104 /* FALLTHROUGH */ 7105 case XPT_SCAN_BUS: 7106 default: 7107 if (bootverbose) { 7108 kprintf("CAM: Finished configuring bus:"); 7109 if (path->bus->sim) { 7110 kprintf(" %s%d\n", 7111 path->bus->sim->sim_name, 7112 path->bus->sim->unit_number); 7113 } else { 7114 kprintf(" (unknown)\n"); 7115 } 7116 } 7117 xpt_uncount_bus(path->bus); 7118 xpt_free_path(path); 7119 xpt_free_ccb(done_ccb); 7120 break; 7121 } 7122 } 7123 7124 cam_status 7125 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 7126 struct cam_path *path) 7127 { 7128 struct ccb_setasync csa; 7129 cam_status status; 7130 int xptpath = 0; 7131 7132 if (path == NULL) { 7133 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7134 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 7135 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 7136 if (status != CAM_REQ_CMP) { 7137 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7138 return (status); 7139 } 7140 xptpath = 1; 7141 } 7142 7143 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 7144 csa.ccb_h.func_code = XPT_SASYNC_CB; 7145 csa.event_enable = event; 7146 csa.callback = cbfunc; 7147 csa.callback_arg = cbarg; 7148 xpt_action((union ccb *)&csa); 7149 status = csa.ccb_h.status; 7150 if (xptpath) { 7151 xpt_free_path(path); 7152 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7153 } 7154 return (status); 7155 } 7156 7157 static void 7158 xptaction(struct cam_sim *sim, union ccb *work_ccb) 7159 { 7160 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 7161 7162 switch (work_ccb->ccb_h.func_code) { 7163 /* Common cases first */ 7164 case XPT_PATH_INQ: /* Path routing inquiry */ 7165 { 7166 struct ccb_pathinq *cpi; 7167 7168 cpi = &work_ccb->cpi; 7169 cpi->version_num = 1; /* XXX??? */ 7170 cpi->hba_inquiry = 0; 7171 cpi->target_sprt = 0; 7172 cpi->hba_misc = 0; 7173 cpi->hba_eng_cnt = 0; 7174 cpi->max_target = 0; 7175 cpi->max_lun = 0; 7176 cpi->initiator_id = 0; 7177 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 7178 strncpy(cpi->hba_vid, "", HBA_IDLEN); 7179 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 7180 cpi->unit_number = sim->unit_number; 7181 cpi->bus_id = sim->bus_id; 7182 cpi->base_transfer_speed = 0; 7183 cpi->protocol = PROTO_UNSPECIFIED; 7184 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 7185 cpi->transport = XPORT_UNSPECIFIED; 7186 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 7187 cpi->ccb_h.status = CAM_REQ_CMP; 7188 xpt_done(work_ccb); 7189 break; 7190 } 7191 default: 7192 work_ccb->ccb_h.status = CAM_REQ_INVALID; 7193 xpt_done(work_ccb); 7194 break; 7195 } 7196 } 7197 7198 /* 7199 * The xpt as a "controller" has no interrupt sources, so polling 7200 * is a no-op. 7201 */ 7202 static void 7203 xptpoll(struct cam_sim *sim) 7204 { 7205 } 7206 7207 void 7208 xpt_lock_buses(void) 7209 { 7210 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 7211 } 7212 7213 void 7214 xpt_unlock_buses(void) 7215 { 7216 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 7217 } 7218 7219 7220 /* 7221 * Should only be called by the machine interrupt dispatch routines, 7222 * so put these prototypes here instead of in the header. 7223 */ 7224 7225 static void 7226 swi_cambio(void *arg, void *frame) 7227 { 7228 camisr(NULL); 7229 } 7230 7231 static void 7232 camisr(void *dummy) 7233 { 7234 cam_simq_t queue; 7235 struct cam_sim *sim; 7236 7237 spin_lock(&cam_simq_spin); 7238 TAILQ_INIT(&queue); 7239 TAILQ_CONCAT(&queue, &cam_simq, links); 7240 spin_unlock(&cam_simq_spin); 7241 7242 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 7243 TAILQ_REMOVE(&queue, sim, links); 7244 CAM_SIM_LOCK(sim); 7245 sim->flags &= ~CAM_SIM_ON_DONEQ; 7246 camisr_runqueue(sim); 7247 CAM_SIM_UNLOCK(sim); 7248 } 7249 } 7250 7251 static void 7252 camisr_runqueue(struct cam_sim *sim) 7253 { 7254 struct ccb_hdr *ccb_h; 7255 int runq; 7256 7257 spin_lock(&sim->sim_spin); 7258 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { 7259 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); 7260 spin_unlock(&sim->sim_spin); 7261 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 7262 7263 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 7264 ("camisr\n")); 7265 7266 runq = FALSE; 7267 7268 if (ccb_h->flags & CAM_HIGH_POWER) { 7269 struct highpowerlist *hphead; 7270 struct cam_ed *device; 7271 union ccb *send_ccb; 7272 7273 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7274 hphead = &xsoftc.highpowerq; 7275 7276 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 7277 7278 /* 7279 * Increment the count since this command is done. 7280 */ 7281 xsoftc.num_highpower++; 7282 7283 /* 7284 * Any high powered commands queued up? 7285 */ 7286 if (send_ccb != NULL) { 7287 device = send_ccb->ccb_h.path->device; 7288 7289 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 7290 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7291 7292 xpt_release_devq(send_ccb->ccb_h.path, 7293 /*count*/1, /*runqueue*/TRUE); 7294 } else 7295 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7296 } 7297 7298 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 7299 struct cam_ed *dev; 7300 7301 dev = ccb_h->path->device; 7302 7303 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 7304 7305 /* 7306 * devq may be NULL if this is cam_dead_sim 7307 */ 7308 if (ccb_h->path->bus->sim->devq) { 7309 ccb_h->path->bus->sim->devq->send_active--; 7310 ccb_h->path->bus->sim->devq->send_openings++; 7311 } 7312 7313 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 7314 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 7315 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 7316 && (dev->ccbq.dev_active == 0))) { 7317 7318 xpt_release_devq(ccb_h->path, /*count*/1, 7319 /*run_queue*/TRUE); 7320 } 7321 7322 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 7323 && (--dev->tag_delay_count == 0)) 7324 xpt_start_tags(ccb_h->path); 7325 7326 if ((dev->ccbq.queue.entries > 0) 7327 && (dev->qfrozen_cnt == 0) 7328 && (device_is_send_queued(dev) == 0)) { 7329 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 7330 dev); 7331 } 7332 } 7333 7334 if (ccb_h->status & CAM_RELEASE_SIMQ) { 7335 xpt_release_simq(ccb_h->path->bus->sim, 7336 /*run_queue*/TRUE); 7337 ccb_h->status &= ~CAM_RELEASE_SIMQ; 7338 runq = FALSE; 7339 } 7340 7341 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 7342 && (ccb_h->status & CAM_DEV_QFRZN)) { 7343 xpt_release_devq(ccb_h->path, /*count*/1, 7344 /*run_queue*/TRUE); 7345 ccb_h->status &= ~CAM_DEV_QFRZN; 7346 } else if (runq) { 7347 xpt_run_dev_sendq(ccb_h->path->bus); 7348 } 7349 7350 /* Call the peripheral driver's callback */ 7351 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 7352 spin_lock(&sim->sim_spin); 7353 } 7354 spin_unlock(&sim->sim_spin); 7355 } 7356 7357 /* 7358 * The dead_sim isn't completely hooked into CAM, we have to make sure 7359 * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() 7360 * doesn't block. 7361 */ 7362 static void 7363 dead_sim_action(struct cam_sim *sim, union ccb *ccb) 7364 { 7365 7366 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 7367 xpt_done(ccb); 7368 camisr_runqueue(sim); 7369 } 7370 7371 static void 7372 dead_sim_poll(struct cam_sim *sim) 7373 { 7374 } 7375