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, "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, "cam_dead_sim"); 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_mp(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL, -1); 1539 1540 return (0); 1541 } 1542 1543 static cam_status 1544 xptregister(struct cam_periph *periph, void *arg) 1545 { 1546 struct cam_sim *xpt_sim; 1547 1548 if (periph == NULL) { 1549 kprintf("xptregister: periph was NULL!!\n"); 1550 return(CAM_REQ_CMP_ERR); 1551 } 1552 1553 xpt_sim = (struct cam_sim *)arg; 1554 xpt_sim->softc = periph; 1555 xpt_periph = periph; 1556 periph->softc = NULL; 1557 1558 return(CAM_REQ_CMP); 1559 } 1560 1561 int32_t 1562 xpt_add_periph(struct cam_periph *periph) 1563 { 1564 struct cam_ed *device; 1565 int32_t status; 1566 struct periph_list *periph_head; 1567 1568 sim_lock_assert_owned(periph->sim->lock); 1569 1570 device = periph->path->device; 1571 1572 periph_head = &device->periphs; 1573 1574 status = CAM_REQ_CMP; 1575 1576 if (device != NULL) { 1577 /* 1578 * Make room for this peripheral 1579 * so it will fit in the queue 1580 * when it's scheduled to run 1581 */ 1582 status = camq_resize(&device->drvq, 1583 device->drvq.array_size + 1); 1584 1585 device->generation++; 1586 1587 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1588 } 1589 1590 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1591 xsoftc.xpt_generation++; 1592 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1593 1594 return (status); 1595 } 1596 1597 void 1598 xpt_remove_periph(struct cam_periph *periph) 1599 { 1600 struct cam_ed *device; 1601 1602 sim_lock_assert_owned(periph->sim->lock); 1603 1604 device = periph->path->device; 1605 1606 if (device != NULL) { 1607 struct periph_list *periph_head; 1608 1609 periph_head = &device->periphs; 1610 1611 /* Release the slot for this peripheral */ 1612 camq_resize(&device->drvq, device->drvq.array_size - 1); 1613 1614 device->generation++; 1615 1616 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1617 } 1618 1619 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1620 xsoftc.xpt_generation++; 1621 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1622 } 1623 1624 void 1625 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1626 { 1627 struct ccb_pathinq cpi; 1628 struct ccb_trans_settings cts; 1629 struct cam_path *path; 1630 u_int speed; 1631 u_int freq; 1632 u_int mb; 1633 1634 sim_lock_assert_owned(periph->sim->lock); 1635 1636 path = periph->path; 1637 1638 /* Report basic attachment and inquiry data */ 1639 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1640 periph->periph_name, periph->unit_number, 1641 path->bus->sim->sim_name, 1642 path->bus->sim->unit_number, 1643 path->bus->sim->bus_id, 1644 path->target->target_id, 1645 path->device->lun_id); 1646 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1647 scsi_print_inquiry(&path->device->inq_data); 1648 1649 /* Report serial number */ 1650 if (path->device->serial_num_len > 0) { 1651 /* Don't wrap the screen - print only the first 60 chars */ 1652 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1653 periph->unit_number, path->device->serial_num); 1654 } 1655 1656 /* Acquire and report transfer speed */ 1657 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1658 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1659 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1660 xpt_action((union ccb*)&cts); 1661 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1662 return; 1663 } 1664 1665 /* Ask the SIM for its base transfer speed */ 1666 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1667 cpi.ccb_h.func_code = XPT_PATH_INQ; 1668 xpt_action((union ccb *)&cpi); 1669 1670 speed = cpi.base_transfer_speed; 1671 freq = 0; 1672 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1673 struct ccb_trans_settings_spi *spi; 1674 1675 spi = &cts.xport_specific.spi; 1676 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1677 && spi->sync_offset != 0) { 1678 freq = scsi_calc_syncsrate(spi->sync_period); 1679 speed = freq; 1680 } 1681 1682 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1683 speed *= (0x01 << spi->bus_width); 1684 } 1685 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1686 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; 1687 if (fc->valid & CTS_FC_VALID_SPEED) { 1688 speed = fc->bitrate; 1689 } 1690 } 1691 1692 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { 1693 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; 1694 if (sas->valid & CTS_SAS_VALID_SPEED) { 1695 speed = sas->bitrate; 1696 } 1697 } 1698 1699 mb = speed / 1000; 1700 if (mb > 0) 1701 kprintf("%s%d: %d.%03dMB/s transfers", 1702 periph->periph_name, periph->unit_number, 1703 mb, speed % 1000); 1704 else 1705 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1706 periph->unit_number, speed); 1707 1708 /* Report additional information about SPI connections */ 1709 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1710 struct ccb_trans_settings_spi *spi; 1711 1712 spi = &cts.xport_specific.spi; 1713 if (freq != 0) { 1714 kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1715 freq % 1000, 1716 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1717 ? " DT" : "", 1718 spi->sync_offset); 1719 } 1720 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1721 && spi->bus_width > 0) { 1722 if (freq != 0) { 1723 kprintf(", "); 1724 } else { 1725 kprintf(" ("); 1726 } 1727 kprintf("%dbit)", 8 * (0x01 << spi->bus_width)); 1728 } else if (freq != 0) { 1729 kprintf(")"); 1730 } 1731 } 1732 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1733 struct ccb_trans_settings_fc *fc; 1734 1735 fc = &cts.xport_specific.fc; 1736 if (fc->valid & CTS_FC_VALID_WWNN) 1737 kprintf(" WWNN 0x%llx", (long long) fc->wwnn); 1738 if (fc->valid & CTS_FC_VALID_WWPN) 1739 kprintf(" WWPN 0x%llx", (long long) fc->wwpn); 1740 if (fc->valid & CTS_FC_VALID_PORT) 1741 kprintf(" PortID 0x%x", fc->port); 1742 } 1743 1744 if (path->device->inq_flags & SID_CmdQue 1745 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1746 kprintf("\n%s%d: Command Queueing Enabled", 1747 periph->periph_name, periph->unit_number); 1748 } 1749 kprintf("\n"); 1750 1751 /* 1752 * We only want to print the caller's announce string if they've 1753 * passed one in.. 1754 */ 1755 if (announce_string != NULL) 1756 kprintf("%s%d: %s\n", periph->periph_name, 1757 periph->unit_number, announce_string); 1758 } 1759 1760 static dev_match_ret 1761 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1762 struct cam_eb *bus) 1763 { 1764 dev_match_ret retval; 1765 int i; 1766 1767 retval = DM_RET_NONE; 1768 1769 /* 1770 * If we aren't given something to match against, that's an error. 1771 */ 1772 if (bus == NULL) 1773 return(DM_RET_ERROR); 1774 1775 /* 1776 * If there are no match entries, then this bus matches no 1777 * matter what. 1778 */ 1779 if ((patterns == NULL) || (num_patterns == 0)) 1780 return(DM_RET_DESCEND | DM_RET_COPY); 1781 1782 for (i = 0; i < num_patterns; i++) { 1783 struct bus_match_pattern *cur_pattern; 1784 1785 /* 1786 * If the pattern in question isn't for a bus node, we 1787 * aren't interested. However, we do indicate to the 1788 * calling routine that we should continue descending the 1789 * tree, since the user wants to match against lower-level 1790 * EDT elements. 1791 */ 1792 if (patterns[i].type != DEV_MATCH_BUS) { 1793 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1794 retval |= DM_RET_DESCEND; 1795 continue; 1796 } 1797 1798 cur_pattern = &patterns[i].pattern.bus_pattern; 1799 1800 /* 1801 * If they want to match any bus node, we give them any 1802 * device node. 1803 */ 1804 if (cur_pattern->flags == BUS_MATCH_ANY) { 1805 /* set the copy flag */ 1806 retval |= DM_RET_COPY; 1807 1808 /* 1809 * If we've already decided on an action, go ahead 1810 * and return. 1811 */ 1812 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1813 return(retval); 1814 } 1815 1816 /* 1817 * Not sure why someone would do this... 1818 */ 1819 if (cur_pattern->flags == BUS_MATCH_NONE) 1820 continue; 1821 1822 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1823 && (cur_pattern->path_id != bus->path_id)) 1824 continue; 1825 1826 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1827 && (cur_pattern->bus_id != bus->sim->bus_id)) 1828 continue; 1829 1830 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1831 && (cur_pattern->unit_number != bus->sim->unit_number)) 1832 continue; 1833 1834 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1835 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1836 DEV_IDLEN) != 0)) 1837 continue; 1838 1839 /* 1840 * If we get to this point, the user definitely wants 1841 * information on this bus. So tell the caller to copy the 1842 * data out. 1843 */ 1844 retval |= DM_RET_COPY; 1845 1846 /* 1847 * If the return action has been set to descend, then we 1848 * know that we've already seen a non-bus matching 1849 * expression, therefore we need to further descend the tree. 1850 * This won't change by continuing around the loop, so we 1851 * go ahead and return. If we haven't seen a non-bus 1852 * matching expression, we keep going around the loop until 1853 * we exhaust the matching expressions. We'll set the stop 1854 * flag once we fall out of the loop. 1855 */ 1856 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1857 return(retval); 1858 } 1859 1860 /* 1861 * If the return action hasn't been set to descend yet, that means 1862 * we haven't seen anything other than bus matching patterns. So 1863 * tell the caller to stop descending the tree -- the user doesn't 1864 * want to match against lower level tree elements. 1865 */ 1866 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1867 retval |= DM_RET_STOP; 1868 1869 return(retval); 1870 } 1871 1872 static dev_match_ret 1873 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1874 struct cam_ed *device) 1875 { 1876 dev_match_ret retval; 1877 int i; 1878 1879 retval = DM_RET_NONE; 1880 1881 /* 1882 * If we aren't given something to match against, that's an error. 1883 */ 1884 if (device == NULL) 1885 return(DM_RET_ERROR); 1886 1887 /* 1888 * If there are no match entries, then this device matches no 1889 * matter what. 1890 */ 1891 if ((patterns == NULL) || (num_patterns == 0)) 1892 return(DM_RET_DESCEND | DM_RET_COPY); 1893 1894 for (i = 0; i < num_patterns; i++) { 1895 struct device_match_pattern *cur_pattern; 1896 1897 /* 1898 * If the pattern in question isn't for a device node, we 1899 * aren't interested. 1900 */ 1901 if (patterns[i].type != DEV_MATCH_DEVICE) { 1902 if ((patterns[i].type == DEV_MATCH_PERIPH) 1903 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1904 retval |= DM_RET_DESCEND; 1905 continue; 1906 } 1907 1908 cur_pattern = &patterns[i].pattern.device_pattern; 1909 1910 /* 1911 * If they want to match any device node, we give them any 1912 * device node. 1913 */ 1914 if (cur_pattern->flags == DEV_MATCH_ANY) { 1915 /* set the copy flag */ 1916 retval |= DM_RET_COPY; 1917 1918 1919 /* 1920 * If we've already decided on an action, go ahead 1921 * and return. 1922 */ 1923 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1924 return(retval); 1925 } 1926 1927 /* 1928 * Not sure why someone would do this... 1929 */ 1930 if (cur_pattern->flags == DEV_MATCH_NONE) 1931 continue; 1932 1933 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1934 && (cur_pattern->path_id != device->target->bus->path_id)) 1935 continue; 1936 1937 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1938 && (cur_pattern->target_id != device->target->target_id)) 1939 continue; 1940 1941 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1942 && (cur_pattern->target_lun != device->lun_id)) 1943 continue; 1944 1945 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1946 && (cam_quirkmatch((caddr_t)&device->inq_data, 1947 (caddr_t)&cur_pattern->inq_pat, 1948 1, sizeof(cur_pattern->inq_pat), 1949 scsi_static_inquiry_match) == NULL)) 1950 continue; 1951 1952 /* 1953 * If we get to this point, the user definitely wants 1954 * information on this device. So tell the caller to copy 1955 * the data out. 1956 */ 1957 retval |= DM_RET_COPY; 1958 1959 /* 1960 * If the return action has been set to descend, then we 1961 * know that we've already seen a peripheral matching 1962 * expression, therefore we need to further descend the tree. 1963 * This won't change by continuing around the loop, so we 1964 * go ahead and return. If we haven't seen a peripheral 1965 * matching expression, we keep going around the loop until 1966 * we exhaust the matching expressions. We'll set the stop 1967 * flag once we fall out of the loop. 1968 */ 1969 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1970 return(retval); 1971 } 1972 1973 /* 1974 * If the return action hasn't been set to descend yet, that means 1975 * we haven't seen any peripheral matching patterns. So tell the 1976 * caller to stop descending the tree -- the user doesn't want to 1977 * match against lower level tree elements. 1978 */ 1979 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1980 retval |= DM_RET_STOP; 1981 1982 return(retval); 1983 } 1984 1985 /* 1986 * Match a single peripheral against any number of match patterns. 1987 */ 1988 static dev_match_ret 1989 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1990 struct cam_periph *periph) 1991 { 1992 dev_match_ret retval; 1993 int i; 1994 1995 /* 1996 * If we aren't given something to match against, that's an error. 1997 */ 1998 if (periph == NULL) 1999 return(DM_RET_ERROR); 2000 2001 /* 2002 * If there are no match entries, then this peripheral matches no 2003 * matter what. 2004 */ 2005 if ((patterns == NULL) || (num_patterns == 0)) 2006 return(DM_RET_STOP | DM_RET_COPY); 2007 2008 /* 2009 * There aren't any nodes below a peripheral node, so there's no 2010 * reason to descend the tree any further. 2011 */ 2012 retval = DM_RET_STOP; 2013 2014 for (i = 0; i < num_patterns; i++) { 2015 struct periph_match_pattern *cur_pattern; 2016 2017 /* 2018 * If the pattern in question isn't for a peripheral, we 2019 * aren't interested. 2020 */ 2021 if (patterns[i].type != DEV_MATCH_PERIPH) 2022 continue; 2023 2024 cur_pattern = &patterns[i].pattern.periph_pattern; 2025 2026 /* 2027 * If they want to match on anything, then we will do so. 2028 */ 2029 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 2030 /* set the copy flag */ 2031 retval |= DM_RET_COPY; 2032 2033 /* 2034 * We've already set the return action to stop, 2035 * since there are no nodes below peripherals in 2036 * the tree. 2037 */ 2038 return(retval); 2039 } 2040 2041 /* 2042 * Not sure why someone would do this... 2043 */ 2044 if (cur_pattern->flags == PERIPH_MATCH_NONE) 2045 continue; 2046 2047 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 2048 && (cur_pattern->path_id != periph->path->bus->path_id)) 2049 continue; 2050 2051 /* 2052 * For the target and lun id's, we have to make sure the 2053 * target and lun pointers aren't NULL. The xpt peripheral 2054 * has a wildcard target and device. 2055 */ 2056 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 2057 && ((periph->path->target == NULL) 2058 ||(cur_pattern->target_id != periph->path->target->target_id))) 2059 continue; 2060 2061 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 2062 && ((periph->path->device == NULL) 2063 || (cur_pattern->target_lun != periph->path->device->lun_id))) 2064 continue; 2065 2066 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 2067 && (cur_pattern->unit_number != periph->unit_number)) 2068 continue; 2069 2070 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 2071 && (strncmp(cur_pattern->periph_name, periph->periph_name, 2072 DEV_IDLEN) != 0)) 2073 continue; 2074 2075 /* 2076 * If we get to this point, the user definitely wants 2077 * information on this peripheral. So tell the caller to 2078 * copy the data out. 2079 */ 2080 retval |= DM_RET_COPY; 2081 2082 /* 2083 * The return action has already been set to stop, since 2084 * peripherals don't have any nodes below them in the EDT. 2085 */ 2086 return(retval); 2087 } 2088 2089 /* 2090 * If we get to this point, the peripheral that was passed in 2091 * doesn't match any of the patterns. 2092 */ 2093 return(retval); 2094 } 2095 2096 static int 2097 xptedtbusfunc(struct cam_eb *bus, void *arg) 2098 { 2099 struct ccb_dev_match *cdm; 2100 dev_match_ret retval; 2101 2102 cdm = (struct ccb_dev_match *)arg; 2103 2104 /* 2105 * If our position is for something deeper in the tree, that means 2106 * that we've already seen this node. So, we keep going down. 2107 */ 2108 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2109 && (cdm->pos.cookie.bus == bus) 2110 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2111 && (cdm->pos.cookie.target != NULL)) 2112 retval = DM_RET_DESCEND; 2113 else 2114 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 2115 2116 /* 2117 * If we got an error, bail out of the search. 2118 */ 2119 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2120 cdm->status = CAM_DEV_MATCH_ERROR; 2121 return(0); 2122 } 2123 2124 /* 2125 * If the copy flag is set, copy this bus out. 2126 */ 2127 if (retval & DM_RET_COPY) { 2128 int spaceleft, j; 2129 2130 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2131 sizeof(struct dev_match_result)); 2132 2133 /* 2134 * If we don't have enough space to put in another 2135 * match result, save our position and tell the 2136 * user there are more devices to check. 2137 */ 2138 if (spaceleft < sizeof(struct dev_match_result)) { 2139 bzero(&cdm->pos, sizeof(cdm->pos)); 2140 cdm->pos.position_type = 2141 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 2142 2143 cdm->pos.cookie.bus = bus; 2144 cdm->pos.generations[CAM_BUS_GENERATION]= 2145 xsoftc.bus_generation; 2146 cdm->status = CAM_DEV_MATCH_MORE; 2147 return(0); 2148 } 2149 j = cdm->num_matches; 2150 cdm->num_matches++; 2151 cdm->matches[j].type = DEV_MATCH_BUS; 2152 cdm->matches[j].result.bus_result.path_id = bus->path_id; 2153 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 2154 cdm->matches[j].result.bus_result.unit_number = 2155 bus->sim->unit_number; 2156 strncpy(cdm->matches[j].result.bus_result.dev_name, 2157 bus->sim->sim_name, DEV_IDLEN); 2158 } 2159 2160 /* 2161 * If the user is only interested in busses, there's no 2162 * reason to descend to the next level in the tree. 2163 */ 2164 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2165 return(1); 2166 2167 /* 2168 * If there is a target generation recorded, check it to 2169 * make sure the target list hasn't changed. 2170 */ 2171 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2172 && (bus == cdm->pos.cookie.bus) 2173 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2174 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 2175 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 2176 bus->generation)) { 2177 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2178 return(0); 2179 } 2180 2181 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2182 && (cdm->pos.cookie.bus == bus) 2183 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2184 && (cdm->pos.cookie.target != NULL)) 2185 return(xpttargettraverse(bus, 2186 (struct cam_et *)cdm->pos.cookie.target, 2187 xptedttargetfunc, arg)); 2188 else 2189 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 2190 } 2191 2192 static int 2193 xptedttargetfunc(struct cam_et *target, void *arg) 2194 { 2195 struct ccb_dev_match *cdm; 2196 2197 cdm = (struct ccb_dev_match *)arg; 2198 2199 /* 2200 * If there is a device list generation recorded, check it to 2201 * make sure the device list hasn't changed. 2202 */ 2203 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2204 && (cdm->pos.cookie.bus == target->bus) 2205 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2206 && (cdm->pos.cookie.target == target) 2207 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2208 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2209 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2210 target->generation)) { 2211 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2212 return(0); 2213 } 2214 2215 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2216 && (cdm->pos.cookie.bus == target->bus) 2217 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2218 && (cdm->pos.cookie.target == target) 2219 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2220 && (cdm->pos.cookie.device != NULL)) 2221 return(xptdevicetraverse(target, 2222 (struct cam_ed *)cdm->pos.cookie.device, 2223 xptedtdevicefunc, arg)); 2224 else 2225 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2226 } 2227 2228 static int 2229 xptedtdevicefunc(struct cam_ed *device, void *arg) 2230 { 2231 2232 struct ccb_dev_match *cdm; 2233 dev_match_ret retval; 2234 2235 cdm = (struct ccb_dev_match *)arg; 2236 2237 /* 2238 * If our position is for something deeper in the tree, that means 2239 * that we've already seen this node. So, we keep going down. 2240 */ 2241 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2242 && (cdm->pos.cookie.device == device) 2243 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2244 && (cdm->pos.cookie.periph != NULL)) 2245 retval = DM_RET_DESCEND; 2246 else 2247 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2248 device); 2249 2250 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2251 cdm->status = CAM_DEV_MATCH_ERROR; 2252 return(0); 2253 } 2254 2255 /* 2256 * If the copy flag is set, copy this device out. 2257 */ 2258 if (retval & DM_RET_COPY) { 2259 int spaceleft, j; 2260 2261 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2262 sizeof(struct dev_match_result)); 2263 2264 /* 2265 * If we don't have enough space to put in another 2266 * match result, save our position and tell the 2267 * user there are more devices to check. 2268 */ 2269 if (spaceleft < sizeof(struct dev_match_result)) { 2270 bzero(&cdm->pos, sizeof(cdm->pos)); 2271 cdm->pos.position_type = 2272 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2273 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2274 2275 cdm->pos.cookie.bus = device->target->bus; 2276 cdm->pos.generations[CAM_BUS_GENERATION]= 2277 xsoftc.bus_generation; 2278 cdm->pos.cookie.target = device->target; 2279 cdm->pos.generations[CAM_TARGET_GENERATION] = 2280 device->target->bus->generation; 2281 cdm->pos.cookie.device = device; 2282 cdm->pos.generations[CAM_DEV_GENERATION] = 2283 device->target->generation; 2284 cdm->status = CAM_DEV_MATCH_MORE; 2285 return(0); 2286 } 2287 j = cdm->num_matches; 2288 cdm->num_matches++; 2289 cdm->matches[j].type = DEV_MATCH_DEVICE; 2290 cdm->matches[j].result.device_result.path_id = 2291 device->target->bus->path_id; 2292 cdm->matches[j].result.device_result.target_id = 2293 device->target->target_id; 2294 cdm->matches[j].result.device_result.target_lun = 2295 device->lun_id; 2296 bcopy(&device->inq_data, 2297 &cdm->matches[j].result.device_result.inq_data, 2298 sizeof(struct scsi_inquiry_data)); 2299 2300 /* Let the user know whether this device is unconfigured */ 2301 if (device->flags & CAM_DEV_UNCONFIGURED) 2302 cdm->matches[j].result.device_result.flags = 2303 DEV_RESULT_UNCONFIGURED; 2304 else 2305 cdm->matches[j].result.device_result.flags = 2306 DEV_RESULT_NOFLAG; 2307 } 2308 2309 /* 2310 * If the user isn't interested in peripherals, don't descend 2311 * the tree any further. 2312 */ 2313 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2314 return(1); 2315 2316 /* 2317 * If there is a peripheral list generation recorded, make sure 2318 * it hasn't changed. 2319 */ 2320 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2321 && (device->target->bus == cdm->pos.cookie.bus) 2322 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2323 && (device->target == cdm->pos.cookie.target) 2324 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2325 && (device == cdm->pos.cookie.device) 2326 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2327 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2328 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2329 device->generation)){ 2330 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2331 return(0); 2332 } 2333 2334 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2335 && (cdm->pos.cookie.bus == device->target->bus) 2336 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2337 && (cdm->pos.cookie.target == device->target) 2338 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2339 && (cdm->pos.cookie.device == device) 2340 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2341 && (cdm->pos.cookie.periph != NULL)) 2342 return(xptperiphtraverse(device, 2343 (struct cam_periph *)cdm->pos.cookie.periph, 2344 xptedtperiphfunc, arg)); 2345 else 2346 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2347 } 2348 2349 static int 2350 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2351 { 2352 struct ccb_dev_match *cdm; 2353 dev_match_ret retval; 2354 2355 cdm = (struct ccb_dev_match *)arg; 2356 2357 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2358 2359 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2360 cdm->status = CAM_DEV_MATCH_ERROR; 2361 return(0); 2362 } 2363 2364 /* 2365 * If the copy flag is set, copy this peripheral out. 2366 */ 2367 if (retval & DM_RET_COPY) { 2368 int spaceleft, j; 2369 2370 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2371 sizeof(struct dev_match_result)); 2372 2373 /* 2374 * If we don't have enough space to put in another 2375 * match result, save our position and tell the 2376 * user there are more devices to check. 2377 */ 2378 if (spaceleft < sizeof(struct dev_match_result)) { 2379 bzero(&cdm->pos, sizeof(cdm->pos)); 2380 cdm->pos.position_type = 2381 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2382 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2383 CAM_DEV_POS_PERIPH; 2384 2385 cdm->pos.cookie.bus = periph->path->bus; 2386 cdm->pos.generations[CAM_BUS_GENERATION]= 2387 xsoftc.bus_generation; 2388 cdm->pos.cookie.target = periph->path->target; 2389 cdm->pos.generations[CAM_TARGET_GENERATION] = 2390 periph->path->bus->generation; 2391 cdm->pos.cookie.device = periph->path->device; 2392 cdm->pos.generations[CAM_DEV_GENERATION] = 2393 periph->path->target->generation; 2394 cdm->pos.cookie.periph = periph; 2395 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2396 periph->path->device->generation; 2397 cdm->status = CAM_DEV_MATCH_MORE; 2398 return(0); 2399 } 2400 2401 j = cdm->num_matches; 2402 cdm->num_matches++; 2403 cdm->matches[j].type = DEV_MATCH_PERIPH; 2404 cdm->matches[j].result.periph_result.path_id = 2405 periph->path->bus->path_id; 2406 cdm->matches[j].result.periph_result.target_id = 2407 periph->path->target->target_id; 2408 cdm->matches[j].result.periph_result.target_lun = 2409 periph->path->device->lun_id; 2410 cdm->matches[j].result.periph_result.unit_number = 2411 periph->unit_number; 2412 strncpy(cdm->matches[j].result.periph_result.periph_name, 2413 periph->periph_name, DEV_IDLEN); 2414 } 2415 2416 return(1); 2417 } 2418 2419 static int 2420 xptedtmatch(struct ccb_dev_match *cdm) 2421 { 2422 int ret; 2423 2424 cdm->num_matches = 0; 2425 2426 /* 2427 * Check the bus list generation. If it has changed, the user 2428 * needs to reset everything and start over. 2429 */ 2430 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2431 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2432 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 2433 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2434 return(0); 2435 } 2436 2437 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2438 && (cdm->pos.cookie.bus != NULL)) 2439 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2440 xptedtbusfunc, cdm); 2441 else 2442 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2443 2444 /* 2445 * If we get back 0, that means that we had to stop before fully 2446 * traversing the EDT. It also means that one of the subroutines 2447 * has set the status field to the proper value. If we get back 1, 2448 * we've fully traversed the EDT and copied out any matching entries. 2449 */ 2450 if (ret == 1) 2451 cdm->status = CAM_DEV_MATCH_LAST; 2452 2453 return(ret); 2454 } 2455 2456 static int 2457 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2458 { 2459 struct ccb_dev_match *cdm; 2460 2461 cdm = (struct ccb_dev_match *)arg; 2462 2463 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2464 && (cdm->pos.cookie.pdrv == pdrv) 2465 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2466 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2467 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2468 (*pdrv)->generation)) { 2469 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2470 return(0); 2471 } 2472 2473 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2474 && (cdm->pos.cookie.pdrv == pdrv) 2475 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2476 && (cdm->pos.cookie.periph != NULL)) 2477 return(xptpdperiphtraverse(pdrv, 2478 (struct cam_periph *)cdm->pos.cookie.periph, 2479 xptplistperiphfunc, arg)); 2480 else 2481 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2482 } 2483 2484 static int 2485 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2486 { 2487 struct ccb_dev_match *cdm; 2488 dev_match_ret retval; 2489 2490 cdm = (struct ccb_dev_match *)arg; 2491 2492 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2493 2494 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2495 cdm->status = CAM_DEV_MATCH_ERROR; 2496 return(0); 2497 } 2498 2499 /* 2500 * If the copy flag is set, copy this peripheral out. 2501 */ 2502 if (retval & DM_RET_COPY) { 2503 int spaceleft, j; 2504 2505 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2506 sizeof(struct dev_match_result)); 2507 2508 /* 2509 * If we don't have enough space to put in another 2510 * match result, save our position and tell the 2511 * user there are more devices to check. 2512 */ 2513 if (spaceleft < sizeof(struct dev_match_result)) { 2514 struct periph_driver **pdrv; 2515 2516 pdrv = NULL; 2517 bzero(&cdm->pos, sizeof(cdm->pos)); 2518 cdm->pos.position_type = 2519 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2520 CAM_DEV_POS_PERIPH; 2521 2522 /* 2523 * This may look a bit non-sensical, but it is 2524 * actually quite logical. There are very few 2525 * peripheral drivers, and bloating every peripheral 2526 * structure with a pointer back to its parent 2527 * peripheral driver linker set entry would cost 2528 * more in the long run than doing this quick lookup. 2529 */ 2530 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2531 if (strcmp((*pdrv)->driver_name, 2532 periph->periph_name) == 0) 2533 break; 2534 } 2535 2536 if (*pdrv == NULL) { 2537 cdm->status = CAM_DEV_MATCH_ERROR; 2538 return(0); 2539 } 2540 2541 cdm->pos.cookie.pdrv = pdrv; 2542 /* 2543 * The periph generation slot does double duty, as 2544 * does the periph pointer slot. They are used for 2545 * both edt and pdrv lookups and positioning. 2546 */ 2547 cdm->pos.cookie.periph = periph; 2548 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2549 (*pdrv)->generation; 2550 cdm->status = CAM_DEV_MATCH_MORE; 2551 return(0); 2552 } 2553 2554 j = cdm->num_matches; 2555 cdm->num_matches++; 2556 cdm->matches[j].type = DEV_MATCH_PERIPH; 2557 cdm->matches[j].result.periph_result.path_id = 2558 periph->path->bus->path_id; 2559 2560 /* 2561 * The transport layer peripheral doesn't have a target or 2562 * lun. 2563 */ 2564 if (periph->path->target) 2565 cdm->matches[j].result.periph_result.target_id = 2566 periph->path->target->target_id; 2567 else 2568 cdm->matches[j].result.periph_result.target_id = -1; 2569 2570 if (periph->path->device) 2571 cdm->matches[j].result.periph_result.target_lun = 2572 periph->path->device->lun_id; 2573 else 2574 cdm->matches[j].result.periph_result.target_lun = -1; 2575 2576 cdm->matches[j].result.periph_result.unit_number = 2577 periph->unit_number; 2578 strncpy(cdm->matches[j].result.periph_result.periph_name, 2579 periph->periph_name, DEV_IDLEN); 2580 } 2581 2582 return(1); 2583 } 2584 2585 static int 2586 xptperiphlistmatch(struct ccb_dev_match *cdm) 2587 { 2588 int ret; 2589 2590 cdm->num_matches = 0; 2591 2592 /* 2593 * At this point in the edt traversal function, we check the bus 2594 * list generation to make sure that no busses have been added or 2595 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2596 * For the peripheral driver list traversal function, however, we 2597 * don't have to worry about new peripheral driver types coming or 2598 * going; they're in a linker set, and therefore can't change 2599 * without a recompile. 2600 */ 2601 2602 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2603 && (cdm->pos.cookie.pdrv != NULL)) 2604 ret = xptpdrvtraverse( 2605 (struct periph_driver **)cdm->pos.cookie.pdrv, 2606 xptplistpdrvfunc, cdm); 2607 else 2608 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2609 2610 /* 2611 * If we get back 0, that means that we had to stop before fully 2612 * traversing the peripheral driver tree. It also means that one of 2613 * the subroutines has set the status field to the proper value. If 2614 * we get back 1, we've fully traversed the EDT and copied out any 2615 * matching entries. 2616 */ 2617 if (ret == 1) 2618 cdm->status = CAM_DEV_MATCH_LAST; 2619 2620 return(ret); 2621 } 2622 2623 static int 2624 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2625 { 2626 struct cam_eb *bus, *next_bus; 2627 int retval; 2628 2629 retval = 1; 2630 2631 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2632 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 2633 bus != NULL; 2634 bus = next_bus) { 2635 next_bus = TAILQ_NEXT(bus, links); 2636 2637 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2638 CAM_SIM_LOCK(bus->sim); 2639 retval = tr_func(bus, arg); 2640 CAM_SIM_UNLOCK(bus->sim); 2641 if (retval == 0) 2642 return(retval); 2643 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2644 } 2645 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2646 2647 return(retval); 2648 } 2649 2650 static int 2651 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2652 xpt_targetfunc_t *tr_func, void *arg) 2653 { 2654 struct cam_et *target, *next_target; 2655 int retval; 2656 2657 retval = 1; 2658 for (target = (start_target ? start_target : 2659 TAILQ_FIRST(&bus->et_entries)); 2660 target != NULL; target = next_target) { 2661 2662 next_target = TAILQ_NEXT(target, links); 2663 2664 retval = tr_func(target, arg); 2665 2666 if (retval == 0) 2667 return(retval); 2668 } 2669 2670 return(retval); 2671 } 2672 2673 static int 2674 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2675 xpt_devicefunc_t *tr_func, void *arg) 2676 { 2677 struct cam_ed *device, *next_device; 2678 int retval; 2679 2680 retval = 1; 2681 for (device = (start_device ? start_device : 2682 TAILQ_FIRST(&target->ed_entries)); 2683 device != NULL; 2684 device = next_device) { 2685 2686 next_device = TAILQ_NEXT(device, links); 2687 2688 retval = tr_func(device, arg); 2689 2690 if (retval == 0) 2691 return(retval); 2692 } 2693 2694 return(retval); 2695 } 2696 2697 static int 2698 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2699 xpt_periphfunc_t *tr_func, void *arg) 2700 { 2701 struct cam_periph *periph, *next_periph; 2702 int retval; 2703 2704 retval = 1; 2705 2706 for (periph = (start_periph ? start_periph : 2707 SLIST_FIRST(&device->periphs)); 2708 periph != NULL; 2709 periph = next_periph) { 2710 2711 next_periph = SLIST_NEXT(periph, periph_links); 2712 2713 retval = tr_func(periph, arg); 2714 if (retval == 0) 2715 return(retval); 2716 } 2717 2718 return(retval); 2719 } 2720 2721 static int 2722 xptpdrvtraverse(struct periph_driver **start_pdrv, 2723 xpt_pdrvfunc_t *tr_func, void *arg) 2724 { 2725 struct periph_driver **pdrv; 2726 int retval; 2727 2728 retval = 1; 2729 2730 /* 2731 * We don't traverse the peripheral driver list like we do the 2732 * other lists, because it is a linker set, and therefore cannot be 2733 * changed during runtime. If the peripheral driver list is ever 2734 * re-done to be something other than a linker set (i.e. it can 2735 * change while the system is running), the list traversal should 2736 * be modified to work like the other traversal functions. 2737 */ 2738 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2739 *pdrv != NULL; pdrv++) { 2740 retval = tr_func(pdrv, arg); 2741 2742 if (retval == 0) 2743 return(retval); 2744 } 2745 2746 return(retval); 2747 } 2748 2749 static int 2750 xptpdperiphtraverse(struct periph_driver **pdrv, 2751 struct cam_periph *start_periph, 2752 xpt_periphfunc_t *tr_func, void *arg) 2753 { 2754 struct cam_periph *periph, *next_periph; 2755 int retval; 2756 2757 retval = 1; 2758 2759 for (periph = (start_periph ? start_periph : 2760 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2761 periph = next_periph) { 2762 2763 next_periph = TAILQ_NEXT(periph, unit_links); 2764 2765 retval = tr_func(periph, arg); 2766 if (retval == 0) 2767 return(retval); 2768 } 2769 return(retval); 2770 } 2771 2772 static int 2773 xptdefbusfunc(struct cam_eb *bus, void *arg) 2774 { 2775 struct xpt_traverse_config *tr_config; 2776 2777 tr_config = (struct xpt_traverse_config *)arg; 2778 2779 if (tr_config->depth == XPT_DEPTH_BUS) { 2780 xpt_busfunc_t *tr_func; 2781 2782 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2783 2784 return(tr_func(bus, tr_config->tr_arg)); 2785 } else 2786 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2787 } 2788 2789 static int 2790 xptdeftargetfunc(struct cam_et *target, void *arg) 2791 { 2792 struct xpt_traverse_config *tr_config; 2793 2794 tr_config = (struct xpt_traverse_config *)arg; 2795 2796 if (tr_config->depth == XPT_DEPTH_TARGET) { 2797 xpt_targetfunc_t *tr_func; 2798 2799 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2800 2801 return(tr_func(target, tr_config->tr_arg)); 2802 } else 2803 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2804 } 2805 2806 static int 2807 xptdefdevicefunc(struct cam_ed *device, void *arg) 2808 { 2809 struct xpt_traverse_config *tr_config; 2810 2811 tr_config = (struct xpt_traverse_config *)arg; 2812 2813 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2814 xpt_devicefunc_t *tr_func; 2815 2816 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2817 2818 return(tr_func(device, tr_config->tr_arg)); 2819 } else 2820 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2821 } 2822 2823 static int 2824 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2825 { 2826 struct xpt_traverse_config *tr_config; 2827 xpt_periphfunc_t *tr_func; 2828 2829 tr_config = (struct xpt_traverse_config *)arg; 2830 2831 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2832 2833 /* 2834 * Unlike the other default functions, we don't check for depth 2835 * here. The peripheral driver level is the last level in the EDT, 2836 * so if we're here, we should execute the function in question. 2837 */ 2838 return(tr_func(periph, tr_config->tr_arg)); 2839 } 2840 2841 /* 2842 * Execute the given function for every bus in the EDT. 2843 */ 2844 static int 2845 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2846 { 2847 struct xpt_traverse_config tr_config; 2848 2849 tr_config.depth = XPT_DEPTH_BUS; 2850 tr_config.tr_func = tr_func; 2851 tr_config.tr_arg = arg; 2852 2853 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2854 } 2855 2856 /* 2857 * Execute the given function for every device in the EDT. 2858 */ 2859 static int 2860 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2861 { 2862 struct xpt_traverse_config tr_config; 2863 2864 tr_config.depth = XPT_DEPTH_DEVICE; 2865 tr_config.tr_func = tr_func; 2866 tr_config.tr_arg = arg; 2867 2868 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2869 } 2870 2871 static int 2872 xptsetasyncfunc(struct cam_ed *device, void *arg) 2873 { 2874 struct cam_path path; 2875 struct ccb_getdev cgd; 2876 struct async_node *cur_entry; 2877 2878 cur_entry = (struct async_node *)arg; 2879 2880 /* 2881 * Don't report unconfigured devices (Wildcard devs, 2882 * devices only for target mode, device instances 2883 * that have been invalidated but are waiting for 2884 * their last reference count to be released). 2885 */ 2886 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2887 return (1); 2888 2889 xpt_compile_path(&path, 2890 NULL, 2891 device->target->bus->path_id, 2892 device->target->target_id, 2893 device->lun_id); 2894 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2895 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2896 xpt_action((union ccb *)&cgd); 2897 cur_entry->callback(cur_entry->callback_arg, 2898 AC_FOUND_DEVICE, 2899 &path, &cgd); 2900 xpt_release_path(&path); 2901 2902 return(1); 2903 } 2904 2905 static int 2906 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2907 { 2908 struct cam_path path; 2909 struct ccb_pathinq cpi; 2910 struct async_node *cur_entry; 2911 2912 cur_entry = (struct async_node *)arg; 2913 2914 xpt_compile_path(&path, /*periph*/NULL, 2915 bus->sim->path_id, 2916 CAM_TARGET_WILDCARD, 2917 CAM_LUN_WILDCARD); 2918 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2919 cpi.ccb_h.func_code = XPT_PATH_INQ; 2920 xpt_action((union ccb *)&cpi); 2921 cur_entry->callback(cur_entry->callback_arg, 2922 AC_PATH_REGISTERED, 2923 &path, &cpi); 2924 xpt_release_path(&path); 2925 2926 return(1); 2927 } 2928 2929 static void 2930 xpt_action_sasync_cb(void *context, int pending) 2931 { 2932 struct async_node *cur_entry; 2933 struct xpt_task *task; 2934 uint32_t added; 2935 2936 task = (struct xpt_task *)context; 2937 cur_entry = (struct async_node *)task->data1; 2938 added = task->data2; 2939 2940 if ((added & AC_FOUND_DEVICE) != 0) { 2941 /* 2942 * Get this peripheral up to date with all 2943 * the currently existing devices. 2944 */ 2945 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 2946 } 2947 if ((added & AC_PATH_REGISTERED) != 0) { 2948 /* 2949 * Get this peripheral up to date with all 2950 * the currently existing busses. 2951 */ 2952 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 2953 } 2954 kfree(task, M_CAMXPT); 2955 } 2956 2957 void 2958 xpt_action(union ccb *start_ccb) 2959 { 2960 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2961 2962 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2963 2964 switch (start_ccb->ccb_h.func_code) { 2965 case XPT_SCSI_IO: 2966 case XPT_TRIM: 2967 { 2968 struct cam_ed *device; 2969 #ifdef CAMDEBUG 2970 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2971 struct cam_path *path; 2972 2973 path = start_ccb->ccb_h.path; 2974 #endif 2975 2976 /* 2977 * For the sake of compatibility with SCSI-1 2978 * devices that may not understand the identify 2979 * message, we include lun information in the 2980 * second byte of all commands. SCSI-1 specifies 2981 * that luns are a 3 bit value and reserves only 3 2982 * bits for lun information in the CDB. Later 2983 * revisions of the SCSI spec allow for more than 8 2984 * luns, but have deprecated lun information in the 2985 * CDB. So, if the lun won't fit, we must omit. 2986 * 2987 * Also be aware that during initial probing for devices, 2988 * the inquiry information is unknown but initialized to 0. 2989 * This means that this code will be exercised while probing 2990 * devices with an ANSI revision greater than 2. 2991 */ 2992 device = start_ccb->ccb_h.path->device; 2993 if (device->protocol_version <= SCSI_REV_2 2994 && start_ccb->ccb_h.target_lun < 8 2995 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2996 2997 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2998 start_ccb->ccb_h.target_lun << 5; 2999 } 3000 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 3001 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 3002 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 3003 &path->device->inq_data), 3004 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 3005 cdb_str, sizeof(cdb_str)))); 3006 /* FALLTHROUGH */ 3007 } 3008 case XPT_TARGET_IO: 3009 case XPT_CONT_TARGET_IO: 3010 start_ccb->csio.sense_resid = 0; 3011 start_ccb->csio.resid = 0; 3012 /* FALLTHROUGH */ 3013 case XPT_RESET_DEV: 3014 case XPT_ENG_EXEC: 3015 { 3016 struct cam_path *path; 3017 struct cam_sim *sim; 3018 int runq; 3019 3020 path = start_ccb->ccb_h.path; 3021 3022 sim = path->bus->sim; 3023 if (sim == &cam_dead_sim) { 3024 /* The SIM has gone; just execute the CCB directly. */ 3025 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); 3026 (*(sim->sim_action))(sim, start_ccb); 3027 break; 3028 } 3029 3030 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 3031 if (path->device->qfrozen_cnt == 0) 3032 runq = xpt_schedule_dev_sendq(path->bus, path->device); 3033 else 3034 runq = 0; 3035 if (runq != 0) 3036 xpt_run_dev_sendq(path->bus); 3037 break; 3038 } 3039 case XPT_SET_TRAN_SETTINGS: 3040 { 3041 xpt_set_transfer_settings(&start_ccb->cts, 3042 start_ccb->ccb_h.path->device, 3043 /*async_update*/FALSE); 3044 break; 3045 } 3046 case XPT_CALC_GEOMETRY: 3047 { 3048 struct cam_sim *sim; 3049 3050 /* Filter out garbage */ 3051 if (start_ccb->ccg.block_size == 0 3052 || start_ccb->ccg.volume_size == 0) { 3053 start_ccb->ccg.cylinders = 0; 3054 start_ccb->ccg.heads = 0; 3055 start_ccb->ccg.secs_per_track = 0; 3056 start_ccb->ccb_h.status = CAM_REQ_CMP; 3057 break; 3058 } 3059 sim = start_ccb->ccb_h.path->bus->sim; 3060 (*(sim->sim_action))(sim, start_ccb); 3061 break; 3062 } 3063 case XPT_ABORT: 3064 { 3065 union ccb* abort_ccb; 3066 3067 abort_ccb = start_ccb->cab.abort_ccb; 3068 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 3069 3070 if (abort_ccb->ccb_h.pinfo.index >= 0) { 3071 struct cam_ccbq *ccbq; 3072 3073 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3074 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3075 abort_ccb->ccb_h.status = 3076 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3077 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3078 xpt_done(abort_ccb); 3079 start_ccb->ccb_h.status = CAM_REQ_CMP; 3080 break; 3081 } 3082 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3083 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3084 /* 3085 * We've caught this ccb en route to 3086 * the SIM. Flag it for abort and the 3087 * SIM will do so just before starting 3088 * real work on the CCB. 3089 */ 3090 abort_ccb->ccb_h.status = 3091 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3092 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3093 start_ccb->ccb_h.status = CAM_REQ_CMP; 3094 break; 3095 } 3096 } 3097 if (XPT_FC_IS_QUEUED(abort_ccb) 3098 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3099 /* 3100 * It's already completed but waiting 3101 * for our SWI to get to it. 3102 */ 3103 start_ccb->ccb_h.status = CAM_UA_ABORT; 3104 break; 3105 } 3106 /* 3107 * If we weren't able to take care of the abort request 3108 * in the XPT, pass the request down to the SIM for processing. 3109 */ 3110 /* FALLTHROUGH */ 3111 } 3112 case XPT_ACCEPT_TARGET_IO: 3113 case XPT_EN_LUN: 3114 case XPT_IMMED_NOTIFY: 3115 case XPT_NOTIFY_ACK: 3116 case XPT_GET_TRAN_SETTINGS: 3117 case XPT_RESET_BUS: 3118 { 3119 struct cam_sim *sim; 3120 3121 sim = start_ccb->ccb_h.path->bus->sim; 3122 (*(sim->sim_action))(sim, start_ccb); 3123 break; 3124 } 3125 case XPT_PATH_INQ: 3126 { 3127 struct cam_sim *sim; 3128 3129 sim = start_ccb->ccb_h.path->bus->sim; 3130 (*(sim->sim_action))(sim, start_ccb); 3131 break; 3132 } 3133 case XPT_PATH_STATS: 3134 start_ccb->cpis.last_reset = 3135 start_ccb->ccb_h.path->bus->last_reset; 3136 start_ccb->ccb_h.status = CAM_REQ_CMP; 3137 break; 3138 case XPT_GDEV_TYPE: 3139 { 3140 struct cam_ed *dev; 3141 3142 dev = start_ccb->ccb_h.path->device; 3143 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3144 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3145 } else { 3146 struct ccb_getdev *cgd; 3147 3148 cgd = &start_ccb->cgd; 3149 cgd->inq_data = dev->inq_data; 3150 cgd->ccb_h.status = CAM_REQ_CMP; 3151 cgd->serial_num_len = dev->serial_num_len; 3152 if ((dev->serial_num_len > 0) 3153 && (dev->serial_num != NULL)) 3154 bcopy(dev->serial_num, cgd->serial_num, 3155 dev->serial_num_len); 3156 } 3157 break; 3158 } 3159 case XPT_GDEV_STATS: 3160 { 3161 struct cam_ed *dev; 3162 3163 dev = start_ccb->ccb_h.path->device; 3164 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3165 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3166 } else { 3167 struct ccb_getdevstats *cgds; 3168 struct cam_eb *bus; 3169 struct cam_et *tar; 3170 3171 cgds = &start_ccb->cgds; 3172 bus = cgds->ccb_h.path->bus; 3173 tar = cgds->ccb_h.path->target; 3174 cgds->dev_openings = dev->ccbq.dev_openings; 3175 cgds->dev_active = dev->ccbq.dev_active; 3176 cgds->devq_openings = dev->ccbq.devq_openings; 3177 cgds->devq_queued = dev->ccbq.queue.entries; 3178 cgds->held = dev->ccbq.held; 3179 cgds->last_reset = tar->last_reset; 3180 cgds->maxtags = dev->quirk->maxtags; 3181 cgds->mintags = dev->quirk->mintags; 3182 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3183 cgds->last_reset = bus->last_reset; 3184 cgds->ccb_h.status = CAM_REQ_CMP; 3185 } 3186 break; 3187 } 3188 case XPT_GDEVLIST: 3189 { 3190 struct cam_periph *nperiph; 3191 struct periph_list *periph_head; 3192 struct ccb_getdevlist *cgdl; 3193 u_int i; 3194 struct cam_ed *device; 3195 int found; 3196 3197 3198 found = 0; 3199 3200 /* 3201 * Don't want anyone mucking with our data. 3202 */ 3203 device = start_ccb->ccb_h.path->device; 3204 periph_head = &device->periphs; 3205 cgdl = &start_ccb->cgdl; 3206 3207 /* 3208 * Check and see if the list has changed since the user 3209 * last requested a list member. If so, tell them that the 3210 * list has changed, and therefore they need to start over 3211 * from the beginning. 3212 */ 3213 if ((cgdl->index != 0) && 3214 (cgdl->generation != device->generation)) { 3215 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3216 break; 3217 } 3218 3219 /* 3220 * Traverse the list of peripherals and attempt to find 3221 * the requested peripheral. 3222 */ 3223 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3224 (nperiph != NULL) && (i <= cgdl->index); 3225 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3226 if (i == cgdl->index) { 3227 strncpy(cgdl->periph_name, 3228 nperiph->periph_name, 3229 DEV_IDLEN); 3230 cgdl->unit_number = nperiph->unit_number; 3231 found = 1; 3232 } 3233 } 3234 if (found == 0) { 3235 cgdl->status = CAM_GDEVLIST_ERROR; 3236 break; 3237 } 3238 3239 if (nperiph == NULL) 3240 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3241 else 3242 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3243 3244 cgdl->index++; 3245 cgdl->generation = device->generation; 3246 3247 cgdl->ccb_h.status = CAM_REQ_CMP; 3248 break; 3249 } 3250 case XPT_DEV_MATCH: 3251 { 3252 dev_pos_type position_type; 3253 struct ccb_dev_match *cdm; 3254 int ret; 3255 3256 cdm = &start_ccb->cdm; 3257 3258 /* 3259 * There are two ways of getting at information in the EDT. 3260 * The first way is via the primary EDT tree. It starts 3261 * with a list of busses, then a list of targets on a bus, 3262 * then devices/luns on a target, and then peripherals on a 3263 * device/lun. The "other" way is by the peripheral driver 3264 * lists. The peripheral driver lists are organized by 3265 * peripheral driver. (obviously) So it makes sense to 3266 * use the peripheral driver list if the user is looking 3267 * for something like "da1", or all "da" devices. If the 3268 * user is looking for something on a particular bus/target 3269 * or lun, it's generally better to go through the EDT tree. 3270 */ 3271 3272 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3273 position_type = cdm->pos.position_type; 3274 else { 3275 u_int i; 3276 3277 position_type = CAM_DEV_POS_NONE; 3278 3279 for (i = 0; i < cdm->num_patterns; i++) { 3280 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3281 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3282 position_type = CAM_DEV_POS_EDT; 3283 break; 3284 } 3285 } 3286 3287 if (cdm->num_patterns == 0) 3288 position_type = CAM_DEV_POS_EDT; 3289 else if (position_type == CAM_DEV_POS_NONE) 3290 position_type = CAM_DEV_POS_PDRV; 3291 } 3292 3293 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3294 case CAM_DEV_POS_EDT: 3295 ret = xptedtmatch(cdm); 3296 break; 3297 case CAM_DEV_POS_PDRV: 3298 ret = xptperiphlistmatch(cdm); 3299 break; 3300 default: 3301 cdm->status = CAM_DEV_MATCH_ERROR; 3302 break; 3303 } 3304 3305 if (cdm->status == CAM_DEV_MATCH_ERROR) 3306 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3307 else 3308 start_ccb->ccb_h.status = CAM_REQ_CMP; 3309 3310 break; 3311 } 3312 case XPT_SASYNC_CB: 3313 { 3314 struct ccb_setasync *csa; 3315 struct async_node *cur_entry; 3316 struct async_list *async_head; 3317 u_int32_t added; 3318 3319 csa = &start_ccb->csa; 3320 added = csa->event_enable; 3321 async_head = &csa->ccb_h.path->device->asyncs; 3322 3323 /* 3324 * If there is already an entry for us, simply 3325 * update it. 3326 */ 3327 cur_entry = SLIST_FIRST(async_head); 3328 while (cur_entry != NULL) { 3329 if ((cur_entry->callback_arg == csa->callback_arg) 3330 && (cur_entry->callback == csa->callback)) 3331 break; 3332 cur_entry = SLIST_NEXT(cur_entry, links); 3333 } 3334 3335 if (cur_entry != NULL) { 3336 /* 3337 * If the request has no flags set, 3338 * remove the entry. 3339 */ 3340 added &= ~cur_entry->event_enable; 3341 if (csa->event_enable == 0) { 3342 SLIST_REMOVE(async_head, cur_entry, 3343 async_node, links); 3344 atomic_add_int( 3345 &csa->ccb_h.path->device->refcount, -1); 3346 kfree(cur_entry, M_CAMXPT); 3347 } else { 3348 cur_entry->event_enable = csa->event_enable; 3349 } 3350 } else { 3351 cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, 3352 M_INTWAIT); 3353 cur_entry->event_enable = csa->event_enable; 3354 cur_entry->callback_arg = csa->callback_arg; 3355 cur_entry->callback = csa->callback; 3356 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3357 atomic_add_int(&csa->ccb_h.path->device->refcount, 1); 3358 } 3359 3360 /* 3361 * Need to decouple this operation via a taskqueue so that 3362 * the locking doesn't become a mess. 3363 */ 3364 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 3365 struct xpt_task *task; 3366 3367 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 3368 M_INTWAIT); 3369 3370 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 3371 task->data1 = cur_entry; 3372 task->data2 = added; 3373 taskqueue_enqueue(taskqueue_thread[mycpuid], 3374 &task->task); 3375 } 3376 3377 start_ccb->ccb_h.status = CAM_REQ_CMP; 3378 break; 3379 } 3380 case XPT_REL_SIMQ: 3381 { 3382 struct ccb_relsim *crs; 3383 struct cam_ed *dev; 3384 3385 crs = &start_ccb->crs; 3386 dev = crs->ccb_h.path->device; 3387 if (dev == NULL) { 3388 3389 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3390 break; 3391 } 3392 3393 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3394 3395 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 3396 /* Don't ever go below one opening */ 3397 if (crs->openings > 0) { 3398 xpt_dev_ccbq_resize(crs->ccb_h.path, 3399 crs->openings); 3400 3401 if (bootverbose) { 3402 xpt_print(crs->ccb_h.path, 3403 "tagged openings now %d\n", 3404 crs->openings); 3405 } 3406 } 3407 } 3408 } 3409 3410 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3411 3412 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3413 3414 /* 3415 * Just extend the old timeout and decrement 3416 * the freeze count so that a single timeout 3417 * is sufficient for releasing the queue. 3418 */ 3419 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3420 callout_stop(&dev->callout); 3421 } else { 3422 3423 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3424 } 3425 3426 callout_reset(&dev->callout, 3427 (crs->release_timeout * hz) / 1000, 3428 xpt_release_devq_timeout, dev); 3429 3430 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3431 3432 } 3433 3434 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3435 3436 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3437 /* 3438 * Decrement the freeze count so that a single 3439 * completion is still sufficient to unfreeze 3440 * the queue. 3441 */ 3442 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3443 } else { 3444 3445 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3446 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3447 } 3448 } 3449 3450 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3451 3452 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3453 || (dev->ccbq.dev_active == 0)) { 3454 3455 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3456 } else { 3457 3458 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3459 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3460 } 3461 } 3462 3463 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3464 3465 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3466 /*run_queue*/TRUE); 3467 } 3468 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3469 start_ccb->ccb_h.status = CAM_REQ_CMP; 3470 break; 3471 } 3472 case XPT_SCAN_BUS: 3473 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3474 break; 3475 case XPT_SCAN_LUN: 3476 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3477 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3478 start_ccb); 3479 break; 3480 case XPT_DEBUG: { 3481 #ifdef CAMDEBUG 3482 #ifdef CAM_DEBUG_DELAY 3483 cam_debug_delay = CAM_DEBUG_DELAY; 3484 #endif 3485 cam_dflags = start_ccb->cdbg.flags; 3486 if (cam_dpath != NULL) { 3487 xpt_free_path(cam_dpath); 3488 cam_dpath = NULL; 3489 } 3490 3491 if (cam_dflags != CAM_DEBUG_NONE) { 3492 if (xpt_create_path(&cam_dpath, xpt_periph, 3493 start_ccb->ccb_h.path_id, 3494 start_ccb->ccb_h.target_id, 3495 start_ccb->ccb_h.target_lun) != 3496 CAM_REQ_CMP) { 3497 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3498 cam_dflags = CAM_DEBUG_NONE; 3499 } else { 3500 start_ccb->ccb_h.status = CAM_REQ_CMP; 3501 xpt_print(cam_dpath, "debugging flags now %x\n", 3502 cam_dflags); 3503 } 3504 } else { 3505 cam_dpath = NULL; 3506 start_ccb->ccb_h.status = CAM_REQ_CMP; 3507 } 3508 #else /* !CAMDEBUG */ 3509 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3510 #endif /* CAMDEBUG */ 3511 break; 3512 } 3513 case XPT_NOOP: 3514 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3515 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3516 start_ccb->ccb_h.status = CAM_REQ_CMP; 3517 break; 3518 default: 3519 case XPT_SDEV_TYPE: 3520 case XPT_TERM_IO: 3521 case XPT_ENG_INQ: 3522 /* XXX Implement */ 3523 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3524 break; 3525 } 3526 } 3527 3528 void 3529 xpt_polled_action(union ccb *start_ccb) 3530 { 3531 u_int32_t timeout; 3532 struct cam_sim *sim; 3533 struct cam_devq *devq; 3534 struct cam_ed *dev; 3535 3536 timeout = start_ccb->ccb_h.timeout; 3537 sim = start_ccb->ccb_h.path->bus->sim; 3538 devq = sim->devq; 3539 dev = start_ccb->ccb_h.path->device; 3540 3541 sim_lock_assert_owned(sim->lock); 3542 3543 /* 3544 * Steal an opening so that no other queued requests 3545 * can get it before us while we simulate interrupts. 3546 */ 3547 dev->ccbq.devq_openings--; 3548 dev->ccbq.dev_openings--; 3549 3550 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3551 && (--timeout > 0)) { 3552 DELAY(1000); 3553 (*(sim->sim_poll))(sim); 3554 camisr_runqueue(sim); 3555 } 3556 3557 dev->ccbq.devq_openings++; 3558 dev->ccbq.dev_openings++; 3559 3560 if (timeout != 0) { 3561 xpt_action(start_ccb); 3562 while(--timeout > 0) { 3563 (*(sim->sim_poll))(sim); 3564 camisr_runqueue(sim); 3565 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3566 != CAM_REQ_INPROG) 3567 break; 3568 DELAY(1000); 3569 } 3570 if (timeout == 0) { 3571 /* 3572 * XXX Is it worth adding a sim_timeout entry 3573 * point so we can attempt recovery? If 3574 * this is only used for dumps, I don't think 3575 * it is. 3576 */ 3577 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3578 } 3579 } else { 3580 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3581 } 3582 } 3583 3584 /* 3585 * Schedule a peripheral driver to receive a ccb when it's 3586 * target device has space for more transactions. 3587 */ 3588 void 3589 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3590 { 3591 struct cam_ed *device; 3592 union ccb *work_ccb; 3593 int runq; 3594 3595 sim_lock_assert_owned(perph->sim->lock); 3596 3597 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3598 device = perph->path->device; 3599 if (periph_is_queued(perph)) { 3600 /* Simply reorder based on new priority */ 3601 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3602 (" change priority to %d\n", new_priority)); 3603 if (new_priority < perph->pinfo.priority) { 3604 camq_change_priority(&device->drvq, 3605 perph->pinfo.index, 3606 new_priority); 3607 } 3608 runq = 0; 3609 } else if (perph->path->bus->sim == &cam_dead_sim) { 3610 /* The SIM is gone so just call periph_start directly. */ 3611 work_ccb = xpt_get_ccb(perph->path->device); 3612 if (work_ccb == NULL) 3613 return; /* XXX */ 3614 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); 3615 perph->pinfo.priority = new_priority; 3616 perph->periph_start(perph, work_ccb); 3617 return; 3618 } else { 3619 /* New entry on the queue */ 3620 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3621 (" added periph to queue\n")); 3622 perph->pinfo.priority = new_priority; 3623 perph->pinfo.generation = ++device->drvq.generation; 3624 camq_insert(&device->drvq, &perph->pinfo); 3625 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3626 } 3627 if (runq != 0) { 3628 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3629 (" calling xpt_run_devq\n")); 3630 xpt_run_dev_allocq(perph->path->bus); 3631 } 3632 } 3633 3634 3635 /* 3636 * Schedule a device to run on a given queue. 3637 * If the device was inserted as a new entry on the queue, 3638 * return 1 meaning the device queue should be run. If we 3639 * were already queued, implying someone else has already 3640 * started the queue, return 0 so the caller doesn't attempt 3641 * to run the queue. 3642 */ 3643 static int 3644 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3645 u_int32_t new_priority) 3646 { 3647 int retval; 3648 u_int32_t old_priority; 3649 3650 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3651 3652 old_priority = pinfo->priority; 3653 3654 /* 3655 * Are we already queued? 3656 */ 3657 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3658 /* Simply reorder based on new priority */ 3659 if (new_priority < old_priority) { 3660 camq_change_priority(queue, pinfo->index, 3661 new_priority); 3662 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3663 ("changed priority to %d\n", 3664 new_priority)); 3665 } 3666 retval = 0; 3667 } else { 3668 /* New entry on the queue */ 3669 if (new_priority < old_priority) 3670 pinfo->priority = new_priority; 3671 3672 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3673 ("Inserting onto queue\n")); 3674 pinfo->generation = ++queue->generation; 3675 camq_insert(queue, pinfo); 3676 retval = 1; 3677 } 3678 return (retval); 3679 } 3680 3681 static void 3682 xpt_run_dev_allocq(struct cam_eb *bus) 3683 { 3684 struct cam_devq *devq; 3685 3686 if ((devq = bus->sim->devq) == NULL) { 3687 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3688 return; 3689 } 3690 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3691 3692 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3693 (" qfrozen_cnt == 0x%x, entries == %d, " 3694 "openings == %d, active == %d\n", 3695 devq->alloc_queue.qfrozen_cnt, 3696 devq->alloc_queue.entries, 3697 devq->alloc_openings, 3698 devq->alloc_active)); 3699 3700 devq->alloc_queue.qfrozen_cnt++; 3701 while ((devq->alloc_queue.entries > 0) 3702 && (devq->alloc_openings > 0) 3703 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3704 struct cam_ed_qinfo *qinfo; 3705 struct cam_ed *device; 3706 union ccb *work_ccb; 3707 struct cam_periph *drv; 3708 struct camq *drvq; 3709 3710 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3711 CAMQ_HEAD); 3712 device = qinfo->device; 3713 3714 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3715 ("running device %p\n", device)); 3716 3717 drvq = &device->drvq; 3718 3719 #ifdef CAMDEBUG 3720 if (drvq->entries <= 0) { 3721 panic("xpt_run_dev_allocq: " 3722 "Device on queue without any work to do"); 3723 } 3724 #endif 3725 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3726 devq->alloc_openings--; 3727 devq->alloc_active++; 3728 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3729 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3730 drv->pinfo.priority); 3731 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3732 ("calling periph start\n")); 3733 drv->periph_start(drv, work_ccb); 3734 } else { 3735 /* 3736 * Malloc failure in alloc_ccb 3737 */ 3738 /* 3739 * XXX add us to a list to be run from free_ccb 3740 * if we don't have any ccbs active on this 3741 * device queue otherwise we may never get run 3742 * again. 3743 */ 3744 break; 3745 } 3746 3747 if (drvq->entries > 0) { 3748 /* We have more work. Attempt to reschedule */ 3749 xpt_schedule_dev_allocq(bus, device); 3750 } 3751 } 3752 devq->alloc_queue.qfrozen_cnt--; 3753 } 3754 3755 static void 3756 xpt_run_dev_sendq(struct cam_eb *bus) 3757 { 3758 struct cam_devq *devq; 3759 3760 if ((devq = bus->sim->devq) == NULL) { 3761 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3762 return; 3763 } 3764 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3765 3766 devq->send_queue.qfrozen_cnt++; 3767 while ((devq->send_queue.entries > 0) 3768 && (devq->send_openings > 0)) { 3769 struct cam_ed_qinfo *qinfo; 3770 struct cam_ed *device; 3771 union ccb *work_ccb; 3772 struct cam_sim *sim; 3773 3774 if (devq->send_queue.qfrozen_cnt > 1) { 3775 break; 3776 } 3777 3778 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3779 CAMQ_HEAD); 3780 device = qinfo->device; 3781 3782 /* 3783 * If the device has been "frozen", don't attempt 3784 * to run it. 3785 */ 3786 if (device->qfrozen_cnt > 0) { 3787 continue; 3788 } 3789 3790 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3791 ("running device %p\n", device)); 3792 3793 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3794 if (work_ccb == NULL) { 3795 kprintf("device on run queue with no ccbs???\n"); 3796 continue; 3797 } 3798 3799 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3800 3801 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 3802 if (xsoftc.num_highpower <= 0) { 3803 /* 3804 * We got a high power command, but we 3805 * don't have any available slots. Freeze 3806 * the device queue until we have a slot 3807 * available. 3808 */ 3809 device->qfrozen_cnt++; 3810 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3811 &work_ccb->ccb_h, 3812 xpt_links.stqe); 3813 3814 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3815 continue; 3816 } else { 3817 /* 3818 * Consume a high power slot while 3819 * this ccb runs. 3820 */ 3821 xsoftc.num_highpower--; 3822 } 3823 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3824 } 3825 devq->active_dev = device; 3826 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3827 3828 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3829 3830 devq->send_openings--; 3831 devq->send_active++; 3832 3833 if (device->ccbq.queue.entries > 0) 3834 xpt_schedule_dev_sendq(bus, device); 3835 3836 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3837 /* 3838 * The client wants to freeze the queue 3839 * after this CCB is sent. 3840 */ 3841 device->qfrozen_cnt++; 3842 } 3843 3844 /* In Target mode, the peripheral driver knows best... */ 3845 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3846 if ((device->inq_flags & SID_CmdQue) != 0 3847 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3848 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3849 else 3850 /* 3851 * Clear this in case of a retried CCB that 3852 * failed due to a rejected tag. 3853 */ 3854 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3855 } 3856 3857 /* 3858 * Device queues can be shared among multiple sim instances 3859 * that reside on different busses. Use the SIM in the queue 3860 * CCB's path, rather than the one in the bus that was passed 3861 * into this function. 3862 */ 3863 sim = work_ccb->ccb_h.path->bus->sim; 3864 (*(sim->sim_action))(sim, work_ccb); 3865 3866 devq->active_dev = NULL; 3867 } 3868 devq->send_queue.qfrozen_cnt--; 3869 } 3870 3871 /* 3872 * This function merges stuff from the slave ccb into the master ccb, while 3873 * keeping important fields in the master ccb constant. 3874 */ 3875 void 3876 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3877 { 3878 /* 3879 * Pull fields that are valid for peripheral drivers to set 3880 * into the master CCB along with the CCB "payload". 3881 */ 3882 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3883 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3884 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3885 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3886 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3887 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3888 } 3889 3890 void 3891 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3892 { 3893 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3894 callout_init(&ccb_h->timeout_ch); 3895 ccb_h->pinfo.priority = priority; 3896 ccb_h->path = path; 3897 ccb_h->path_id = path->bus->path_id; 3898 if (path->target) 3899 ccb_h->target_id = path->target->target_id; 3900 else 3901 ccb_h->target_id = CAM_TARGET_WILDCARD; 3902 if (path->device) { 3903 ccb_h->target_lun = path->device->lun_id; 3904 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3905 } else { 3906 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3907 } 3908 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3909 ccb_h->flags = 0; 3910 } 3911 3912 /* Path manipulation functions */ 3913 cam_status 3914 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3915 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3916 { 3917 struct cam_path *path; 3918 cam_status status; 3919 3920 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); 3921 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3922 if (status != CAM_REQ_CMP) { 3923 kfree(path, M_CAMXPT); 3924 path = NULL; 3925 } 3926 *new_path_ptr = path; 3927 return (status); 3928 } 3929 3930 cam_status 3931 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3932 struct cam_periph *periph, path_id_t path_id, 3933 target_id_t target_id, lun_id_t lun_id) 3934 { 3935 struct cam_path *path; 3936 struct cam_eb *bus = NULL; 3937 cam_status status; 3938 int need_unlock = 0; 3939 3940 path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3941 3942 if (path_id != CAM_BUS_WILDCARD) { 3943 bus = xpt_find_bus(path_id); 3944 if (bus != NULL) { 3945 need_unlock = 1; 3946 CAM_SIM_LOCK(bus->sim); 3947 } 3948 } 3949 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3950 if (need_unlock) 3951 CAM_SIM_UNLOCK(bus->sim); 3952 if (status != CAM_REQ_CMP) { 3953 kfree(path, M_CAMXPT); 3954 path = NULL; 3955 } 3956 *new_path_ptr = path; 3957 return (status); 3958 } 3959 3960 static cam_status 3961 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3962 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3963 { 3964 struct cam_eb *bus; 3965 struct cam_et *target; 3966 struct cam_ed *device; 3967 cam_status status; 3968 3969 status = CAM_REQ_CMP; /* Completed without error */ 3970 target = NULL; /* Wildcarded */ 3971 device = NULL; /* Wildcarded */ 3972 3973 /* 3974 * We will potentially modify the EDT, so block interrupts 3975 * that may attempt to create cam paths. 3976 */ 3977 bus = xpt_find_bus(path_id); 3978 if (bus == NULL) { 3979 status = CAM_PATH_INVALID; 3980 } else { 3981 target = xpt_find_target(bus, target_id); 3982 if (target == NULL) { 3983 /* Create one */ 3984 struct cam_et *new_target; 3985 3986 new_target = xpt_alloc_target(bus, target_id); 3987 if (new_target == NULL) { 3988 status = CAM_RESRC_UNAVAIL; 3989 } else { 3990 target = new_target; 3991 } 3992 } 3993 if (target != NULL) { 3994 device = xpt_find_device(target, lun_id); 3995 if (device == NULL) { 3996 /* Create one */ 3997 struct cam_ed *new_device; 3998 3999 new_device = xpt_alloc_device(bus, 4000 target, 4001 lun_id); 4002 if (new_device == NULL) { 4003 status = CAM_RESRC_UNAVAIL; 4004 } else { 4005 device = new_device; 4006 } 4007 } 4008 } 4009 } 4010 4011 /* 4012 * Only touch the user's data if we are successful. 4013 */ 4014 if (status == CAM_REQ_CMP) { 4015 new_path->periph = perph; 4016 new_path->bus = bus; 4017 new_path->target = target; 4018 new_path->device = device; 4019 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 4020 } else { 4021 if (device != NULL) 4022 xpt_release_device(bus, target, device); 4023 if (target != NULL) 4024 xpt_release_target(bus, target); 4025 if (bus != NULL) 4026 xpt_release_bus(bus); 4027 } 4028 return (status); 4029 } 4030 4031 static void 4032 xpt_release_path(struct cam_path *path) 4033 { 4034 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 4035 if (path->device != NULL) { 4036 xpt_release_device(path->bus, path->target, path->device); 4037 path->device = NULL; 4038 } 4039 if (path->target != NULL) { 4040 xpt_release_target(path->bus, path->target); 4041 path->target = NULL; 4042 } 4043 if (path->bus != NULL) { 4044 xpt_release_bus(path->bus); 4045 path->bus = NULL; 4046 } 4047 } 4048 4049 void 4050 xpt_free_path(struct cam_path *path) 4051 { 4052 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 4053 xpt_release_path(path); 4054 kfree(path, M_CAMXPT); 4055 } 4056 4057 4058 /* 4059 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 4060 * in path1, 2 for match with wildcards in path2. 4061 */ 4062 int 4063 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 4064 { 4065 int retval = 0; 4066 4067 if (path1->bus != path2->bus) { 4068 if (path1->bus->path_id == CAM_BUS_WILDCARD) 4069 retval = 1; 4070 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 4071 retval = 2; 4072 else 4073 return (-1); 4074 } 4075 if (path1->target != path2->target) { 4076 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 4077 if (retval == 0) 4078 retval = 1; 4079 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 4080 retval = 2; 4081 else 4082 return (-1); 4083 } 4084 if (path1->device != path2->device) { 4085 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4086 if (retval == 0) 4087 retval = 1; 4088 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4089 retval = 2; 4090 else 4091 return (-1); 4092 } 4093 return (retval); 4094 } 4095 4096 void 4097 xpt_print_path(struct cam_path *path) 4098 { 4099 4100 if (path == NULL) 4101 kprintf("(nopath): "); 4102 else { 4103 if (path->periph != NULL) 4104 kprintf("(%s%d:", path->periph->periph_name, 4105 path->periph->unit_number); 4106 else 4107 kprintf("(noperiph:"); 4108 4109 if (path->bus != NULL) 4110 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4111 path->bus->sim->unit_number, 4112 path->bus->sim->bus_id); 4113 else 4114 kprintf("nobus:"); 4115 4116 if (path->target != NULL) 4117 kprintf("%d:", path->target->target_id); 4118 else 4119 kprintf("X:"); 4120 4121 if (path->device != NULL) 4122 kprintf("%d): ", path->device->lun_id); 4123 else 4124 kprintf("X): "); 4125 } 4126 } 4127 4128 void 4129 xpt_print(struct cam_path *path, const char *fmt, ...) 4130 { 4131 __va_list ap; 4132 xpt_print_path(path); 4133 __va_start(ap, fmt); 4134 kvprintf(fmt, ap); 4135 __va_end(ap); 4136 } 4137 4138 int 4139 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4140 { 4141 struct sbuf sb; 4142 4143 sim_lock_assert_owned(path->bus->sim->lock); 4144 4145 sbuf_new(&sb, str, str_len, 0); 4146 4147 if (path == NULL) 4148 sbuf_printf(&sb, "(nopath): "); 4149 else { 4150 if (path->periph != NULL) 4151 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4152 path->periph->unit_number); 4153 else 4154 sbuf_printf(&sb, "(noperiph:"); 4155 4156 if (path->bus != NULL) 4157 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4158 path->bus->sim->unit_number, 4159 path->bus->sim->bus_id); 4160 else 4161 sbuf_printf(&sb, "nobus:"); 4162 4163 if (path->target != NULL) 4164 sbuf_printf(&sb, "%d:", path->target->target_id); 4165 else 4166 sbuf_printf(&sb, "X:"); 4167 4168 if (path->device != NULL) 4169 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4170 else 4171 sbuf_printf(&sb, "X): "); 4172 } 4173 sbuf_finish(&sb); 4174 4175 return(sbuf_len(&sb)); 4176 } 4177 4178 path_id_t 4179 xpt_path_path_id(struct cam_path *path) 4180 { 4181 sim_lock_assert_owned(path->bus->sim->lock); 4182 4183 return(path->bus->path_id); 4184 } 4185 4186 target_id_t 4187 xpt_path_target_id(struct cam_path *path) 4188 { 4189 sim_lock_assert_owned(path->bus->sim->lock); 4190 4191 if (path->target != NULL) 4192 return (path->target->target_id); 4193 else 4194 return (CAM_TARGET_WILDCARD); 4195 } 4196 4197 lun_id_t 4198 xpt_path_lun_id(struct cam_path *path) 4199 { 4200 sim_lock_assert_owned(path->bus->sim->lock); 4201 4202 if (path->device != NULL) 4203 return (path->device->lun_id); 4204 else 4205 return (CAM_LUN_WILDCARD); 4206 } 4207 4208 struct cam_sim * 4209 xpt_path_sim(struct cam_path *path) 4210 { 4211 return (path->bus->sim); 4212 } 4213 4214 struct cam_periph* 4215 xpt_path_periph(struct cam_path *path) 4216 { 4217 sim_lock_assert_owned(path->bus->sim->lock); 4218 4219 return (path->periph); 4220 } 4221 4222 char * 4223 xpt_path_serialno(struct cam_path *path) 4224 { 4225 return (path->device->serial_num); 4226 } 4227 4228 /* 4229 * Release a CAM control block for the caller. Remit the cost of the structure 4230 * to the device referenced by the path. If the this device had no 'credits' 4231 * and peripheral drivers have registered async callbacks for this notification 4232 * call them now. 4233 */ 4234 void 4235 xpt_release_ccb(union ccb *free_ccb) 4236 { 4237 struct cam_path *path; 4238 struct cam_ed *device; 4239 struct cam_eb *bus; 4240 struct cam_sim *sim; 4241 4242 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4243 path = free_ccb->ccb_h.path; 4244 device = path->device; 4245 bus = path->bus; 4246 sim = bus->sim; 4247 4248 sim_lock_assert_owned(sim->lock); 4249 4250 cam_ccbq_release_opening(&device->ccbq); 4251 if (sim->ccb_count > sim->max_ccbs) { 4252 xpt_free_ccb(free_ccb); 4253 sim->ccb_count--; 4254 } else if (sim == &cam_dead_sim) { 4255 xpt_free_ccb(free_ccb); 4256 } else { 4257 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 4258 xpt_links.sle); 4259 } 4260 if (sim->devq == NULL) { 4261 return; 4262 } 4263 sim->devq->alloc_openings++; 4264 sim->devq->alloc_active--; 4265 /* XXX Turn this into an inline function - xpt_run_device?? */ 4266 if ((device_is_alloc_queued(device) == 0) 4267 && (device->drvq.entries > 0)) { 4268 xpt_schedule_dev_allocq(bus, device); 4269 } 4270 if (dev_allocq_is_runnable(sim->devq)) 4271 xpt_run_dev_allocq(bus); 4272 } 4273 4274 /* Functions accessed by SIM drivers */ 4275 4276 /* 4277 * A sim structure, listing the SIM entry points and instance 4278 * identification info is passed to xpt_bus_register to hook the SIM 4279 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4280 * for this new bus and places it in the array of busses and assigns 4281 * it a path_id. The path_id may be influenced by "hard wiring" 4282 * information specified by the user. Once interrupt services are 4283 * availible, the bus will be probed. 4284 */ 4285 int32_t 4286 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4287 { 4288 struct cam_eb *new_bus; 4289 struct cam_eb *old_bus; 4290 struct ccb_pathinq cpi; 4291 4292 sim_lock_assert_owned(sim->lock); 4293 4294 sim->bus_id = bus; 4295 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); 4296 4297 if (strcmp(sim->sim_name, "xpt") != 0) { 4298 sim->path_id = 4299 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4300 } 4301 4302 TAILQ_INIT(&new_bus->et_entries); 4303 new_bus->path_id = sim->path_id; 4304 new_bus->sim = sim; 4305 atomic_add_int(&sim->refcount, 1); 4306 timevalclear(&new_bus->last_reset); 4307 new_bus->flags = 0; 4308 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4309 new_bus->generation = 0; 4310 new_bus->counted_to_config = 0; 4311 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4312 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4313 while (old_bus != NULL 4314 && old_bus->path_id < new_bus->path_id) 4315 old_bus = TAILQ_NEXT(old_bus, links); 4316 if (old_bus != NULL) 4317 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4318 else 4319 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4320 xsoftc.bus_generation++; 4321 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4322 4323 /* Notify interested parties */ 4324 if (sim->path_id != CAM_XPT_PATH_ID) { 4325 struct cam_path path; 4326 4327 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4328 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4329 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4330 cpi.ccb_h.func_code = XPT_PATH_INQ; 4331 xpt_action((union ccb *)&cpi); 4332 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4333 xpt_release_path(&path); 4334 } 4335 return (CAM_SUCCESS); 4336 } 4337 4338 /* 4339 * Deregister a bus. We must clean out all transactions pending on the bus. 4340 * This routine is typically called prior to cam_sim_free() (e.g. see 4341 * dev/usbmisc/umass/umass.c) 4342 */ 4343 int32_t 4344 xpt_bus_deregister(path_id_t pathid) 4345 { 4346 struct cam_path bus_path; 4347 struct cam_et *target; 4348 struct cam_ed *device; 4349 struct cam_ed_qinfo *qinfo; 4350 struct cam_devq *devq; 4351 struct cam_periph *periph; 4352 struct cam_sim *ccbsim; 4353 union ccb *work_ccb; 4354 cam_status status; 4355 int retries = 0; 4356 4357 status = xpt_compile_path(&bus_path, NULL, pathid, 4358 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4359 if (status != CAM_REQ_CMP) 4360 return (status); 4361 4362 /* 4363 * This should clear out all pending requests and timeouts, but 4364 * the ccb's may be queued to a software interrupt. 4365 * 4366 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4367 * and it really ought to. 4368 */ 4369 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4370 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4371 4372 /* 4373 * Mark the SIM as having been deregistered. This prevents 4374 * certain operations from re-queueing to it, stops new devices 4375 * from being added, etc. 4376 */ 4377 devq = bus_path.bus->sim->devq; 4378 ccbsim = bus_path.bus->sim; 4379 ccbsim->flags |= CAM_SIM_DEREGISTERED; 4380 4381 again: 4382 /* 4383 * Execute any pending operations now. 4384 */ 4385 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 4386 CAMQ_HEAD)) != NULL || 4387 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 4388 CAMQ_HEAD)) != NULL) { 4389 do { 4390 device = qinfo->device; 4391 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 4392 if (work_ccb != NULL) { 4393 devq->active_dev = device; 4394 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 4395 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 4396 (*(ccbsim->sim_action))(ccbsim, work_ccb); 4397 } 4398 4399 periph = (struct cam_periph *)camq_remove(&device->drvq, 4400 CAMQ_HEAD); 4401 if (periph != NULL) 4402 xpt_schedule(periph, periph->pinfo.priority); 4403 } while (work_ccb != NULL || periph != NULL); 4404 } 4405 4406 /* 4407 * Make sure all completed CCBs are processed. 4408 */ 4409 while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { 4410 camisr_runqueue(ccbsim); 4411 } 4412 4413 /* 4414 * Check for requeues, reissues asyncs if necessary 4415 */ 4416 if (CAMQ_GET_HEAD(&devq->send_queue)) 4417 kprintf("camq: devq send_queue still in use (%d entries)\n", 4418 devq->send_queue.entries); 4419 if (CAMQ_GET_HEAD(&devq->alloc_queue)) 4420 kprintf("camq: devq alloc_queue still in use (%d entries)\n", 4421 devq->alloc_queue.entries); 4422 if (CAMQ_GET_HEAD(&devq->send_queue) || 4423 CAMQ_GET_HEAD(&devq->alloc_queue)) { 4424 if (++retries < 5) { 4425 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4426 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4427 goto again; 4428 } 4429 } 4430 4431 /* 4432 * Retarget the bus and all cached sim pointers to dead_sim. 4433 * 4434 * Various CAM subsystems may be holding on to targets, devices, 4435 * and/or peripherals and may attempt to use the sim pointer cached 4436 * in some of these structures during close. 4437 */ 4438 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4439 bus_path.bus->sim = &cam_dead_sim; 4440 TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { 4441 TAILQ_FOREACH(device, &target->ed_entries, links) { 4442 device->sim = &cam_dead_sim; 4443 SLIST_FOREACH(periph, &device->periphs, periph_links) { 4444 periph->sim = &cam_dead_sim; 4445 } 4446 } 4447 } 4448 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 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 const 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 for (;;) { 4958 int count = bus->refcount; 4959 4960 cpu_ccfence(); 4961 if (count == 1) { 4962 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4963 if (atomic_cmpset_int(&bus->refcount, 1, 0)) { 4964 if (TAILQ_EMPTY(&bus->et_entries)) { 4965 TAILQ_REMOVE(&xsoftc.xpt_busses, 4966 bus, links); 4967 xsoftc.bus_generation++; 4968 kfree(bus, M_CAMXPT); 4969 } 4970 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4971 return; 4972 } 4973 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4974 } else { 4975 if (atomic_cmpset_int(&bus->refcount, count, count-1)) { 4976 return; 4977 } 4978 } 4979 } 4980 } 4981 4982 static struct cam_et * 4983 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4984 { 4985 struct cam_et *target; 4986 struct cam_et *cur_target; 4987 4988 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); 4989 4990 TAILQ_INIT(&target->ed_entries); 4991 target->bus = bus; 4992 target->target_id = target_id; 4993 target->refcount = 1; 4994 target->generation = 0; 4995 timevalclear(&target->last_reset); 4996 4997 /* 4998 * Hold a reference to our parent bus so it 4999 * will not go away before we do. 5000 */ 5001 atomic_add_int(&bus->refcount, 1); 5002 5003 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5004 /* Insertion sort into our bus's target list */ 5005 cur_target = TAILQ_FIRST(&bus->et_entries); 5006 while (cur_target != NULL && cur_target->target_id < target_id) 5007 cur_target = TAILQ_NEXT(cur_target, links); 5008 5009 if (cur_target != NULL) { 5010 TAILQ_INSERT_BEFORE(cur_target, target, links); 5011 } else { 5012 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 5013 } 5014 bus->generation++; 5015 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5016 5017 return (target); 5018 } 5019 5020 static void 5021 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 5022 { 5023 for (;;) { 5024 int count = target->refcount; 5025 5026 cpu_ccfence(); 5027 if (count == 1) { 5028 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5029 if (atomic_cmpset_int(&target->refcount, 1, 0)) { 5030 KKASSERT(TAILQ_EMPTY(&target->ed_entries)); 5031 TAILQ_REMOVE(&bus->et_entries, target, links); 5032 bus->generation++; 5033 kfree(target, M_CAMXPT); 5034 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5035 xpt_release_bus(bus); 5036 return; 5037 } 5038 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5039 } else { 5040 if (atomic_cmpset_int(&target->refcount, 5041 count, count - 1)) { 5042 return; 5043 } 5044 } 5045 } 5046 } 5047 5048 static struct cam_ed * 5049 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 5050 { 5051 struct cam_path path; 5052 struct cam_ed *device; 5053 struct cam_devq *devq; 5054 cam_status status; 5055 5056 /* 5057 * Disallow new devices while trying to deregister a sim 5058 */ 5059 if (bus->sim->flags & CAM_SIM_DEREGISTERED) 5060 return (NULL); 5061 5062 /* 5063 * Make space for us in the device queue on our bus 5064 */ 5065 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5066 devq = bus->sim->devq; 5067 if (devq == NULL) { 5068 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5069 return(NULL); 5070 } 5071 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 5072 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5073 5074 if (status != CAM_REQ_CMP) { 5075 device = NULL; 5076 } else { 5077 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); 5078 } 5079 5080 if (device != NULL) { 5081 struct cam_ed *cur_device; 5082 5083 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 5084 device->alloc_ccb_entry.device = device; 5085 cam_init_pinfo(&device->send_ccb_entry.pinfo); 5086 device->send_ccb_entry.device = device; 5087 device->target = target; 5088 device->lun_id = lun_id; 5089 device->sim = bus->sim; 5090 /* Initialize our queues */ 5091 if (camq_init(&device->drvq, 0) != 0) { 5092 kfree(device, M_CAMXPT); 5093 return (NULL); 5094 } 5095 if (cam_ccbq_init(&device->ccbq, 5096 bus->sim->max_dev_openings) != 0) { 5097 camq_fini(&device->drvq); 5098 kfree(device, M_CAMXPT); 5099 return (NULL); 5100 } 5101 SLIST_INIT(&device->asyncs); 5102 SLIST_INIT(&device->periphs); 5103 device->generation = 0; 5104 device->owner = NULL; 5105 /* 5106 * Take the default quirk entry until we have inquiry 5107 * data and can determine a better quirk to use. 5108 */ 5109 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 5110 bzero(&device->inq_data, sizeof(device->inq_data)); 5111 device->inq_flags = 0; 5112 device->queue_flags = 0; 5113 device->serial_num = NULL; 5114 device->serial_num_len = 0; 5115 device->qfrozen_cnt = 0; 5116 device->flags = CAM_DEV_UNCONFIGURED; 5117 device->tag_delay_count = 0; 5118 device->tag_saved_openings = 0; 5119 device->refcount = 1; 5120 callout_init(&device->callout); 5121 5122 /* 5123 * Hold a reference to our parent target so it 5124 * will not go away before we do. 5125 */ 5126 atomic_add_int(&target->refcount, 1); 5127 5128 /* 5129 * XXX should be limited by number of CCBs this bus can 5130 * do. 5131 */ 5132 bus->sim->max_ccbs += device->ccbq.devq_openings; 5133 /* Insertion sort into our target's device list */ 5134 cur_device = TAILQ_FIRST(&target->ed_entries); 5135 while (cur_device != NULL && cur_device->lun_id < lun_id) 5136 cur_device = TAILQ_NEXT(cur_device, links); 5137 if (cur_device != NULL) { 5138 TAILQ_INSERT_BEFORE(cur_device, device, links); 5139 } else { 5140 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 5141 } 5142 target->generation++; 5143 if (lun_id != CAM_LUN_WILDCARD) { 5144 xpt_compile_path(&path, 5145 NULL, 5146 bus->path_id, 5147 target->target_id, 5148 lun_id); 5149 xpt_devise_transport(&path); 5150 xpt_release_path(&path); 5151 } 5152 } 5153 return (device); 5154 } 5155 5156 static void 5157 xpt_reference_device(struct cam_ed *device) 5158 { 5159 atomic_add_int(&device->refcount, 1); 5160 } 5161 5162 static void 5163 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 5164 struct cam_ed *device) 5165 { 5166 struct cam_devq *devq; 5167 5168 for (;;) { 5169 int count = device->refcount; 5170 5171 if (count == 1) { 5172 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5173 if (atomic_cmpset_int(&device->refcount, 1, 0)) { 5174 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 5175 if (device->alloc_ccb_entry.pinfo.index != 5176 CAM_UNQUEUED_INDEX || 5177 device->send_ccb_entry.pinfo.index != 5178 CAM_UNQUEUED_INDEX) { 5179 panic("Removing device while " 5180 "still queued for ccbs"); 5181 } 5182 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 5183 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 5184 callout_stop(&device->callout); 5185 } 5186 TAILQ_REMOVE(&target->ed_entries, device, links); 5187 target->generation++; 5188 bus->sim->max_ccbs -= device->ccbq.devq_openings; 5189 if ((devq = bus->sim->devq) != NULL) { 5190 /* Release our slot in the devq */ 5191 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 5192 } 5193 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5194 5195 camq_fini(&device->drvq); 5196 camq_fini(&device->ccbq.queue); 5197 xpt_release_target(bus, target); 5198 kfree(device, M_CAMXPT); 5199 return; 5200 } 5201 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5202 } else { 5203 if (atomic_cmpset_int(&device->refcount, 5204 count, count - 1)) { 5205 return; 5206 } 5207 } 5208 } 5209 } 5210 5211 static u_int32_t 5212 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5213 { 5214 int diff; 5215 int result; 5216 struct cam_ed *dev; 5217 5218 dev = path->device; 5219 5220 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 5221 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5222 if (result == CAM_REQ_CMP && (diff < 0)) { 5223 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 5224 } 5225 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5226 || (dev->inq_flags & SID_CmdQue) != 0) 5227 dev->tag_saved_openings = newopenings; 5228 /* Adjust the global limit */ 5229 dev->sim->max_ccbs += diff; 5230 return (result); 5231 } 5232 5233 static struct cam_eb * 5234 xpt_find_bus(path_id_t path_id) 5235 { 5236 struct cam_eb *bus; 5237 5238 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5239 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 5240 if (bus->path_id == path_id) { 5241 atomic_add_int(&bus->refcount, 1); 5242 break; 5243 } 5244 } 5245 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5246 5247 return (bus); 5248 } 5249 5250 static struct cam_et * 5251 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5252 { 5253 struct cam_et *target; 5254 5255 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5256 TAILQ_FOREACH(target, &bus->et_entries, links) { 5257 if (target->target_id == target_id) { 5258 atomic_add_int(&target->refcount, 1); 5259 break; 5260 } 5261 } 5262 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5263 5264 return (target); 5265 } 5266 5267 static struct cam_ed * 5268 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5269 { 5270 struct cam_ed *device; 5271 5272 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5273 TAILQ_FOREACH(device, &target->ed_entries, links) { 5274 if (device->lun_id == lun_id) { 5275 atomic_add_int(&device->refcount, 1); 5276 break; 5277 } 5278 } 5279 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5280 5281 return (device); 5282 } 5283 5284 typedef struct { 5285 union ccb *request_ccb; 5286 struct ccb_pathinq *cpi; 5287 int counter; 5288 } xpt_scan_bus_info; 5289 5290 /* 5291 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5292 * As the scan progresses, xpt_scan_bus is used as the 5293 * callback on completion function. 5294 */ 5295 static void 5296 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5297 { 5298 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5299 ("xpt_scan_bus\n")); 5300 switch (request_ccb->ccb_h.func_code) { 5301 case XPT_SCAN_BUS: 5302 { 5303 xpt_scan_bus_info *scan_info; 5304 union ccb *work_ccb; 5305 struct cam_path *path; 5306 u_int i; 5307 u_int max_target; 5308 u_int initiator_id; 5309 5310 /* Find out the characteristics of the bus */ 5311 work_ccb = xpt_alloc_ccb(); 5312 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5313 request_ccb->ccb_h.pinfo.priority); 5314 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5315 xpt_action(work_ccb); 5316 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5317 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5318 xpt_free_ccb(work_ccb); 5319 xpt_done(request_ccb); 5320 return; 5321 } 5322 5323 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5324 /* 5325 * Can't scan the bus on an adapter that 5326 * cannot perform the initiator role. 5327 */ 5328 request_ccb->ccb_h.status = CAM_REQ_CMP; 5329 xpt_free_ccb(work_ccb); 5330 xpt_done(request_ccb); 5331 return; 5332 } 5333 5334 /* Save some state for use while we probe for devices */ 5335 scan_info = (xpt_scan_bus_info *) 5336 kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); 5337 scan_info->request_ccb = request_ccb; 5338 scan_info->cpi = &work_ccb->cpi; 5339 5340 /* Cache on our stack so we can work asynchronously */ 5341 max_target = scan_info->cpi->max_target; 5342 initiator_id = scan_info->cpi->initiator_id; 5343 5344 5345 /* 5346 * We can scan all targets in parallel, or do it sequentially. 5347 */ 5348 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5349 max_target = 0; 5350 scan_info->counter = 0; 5351 } else { 5352 scan_info->counter = scan_info->cpi->max_target + 1; 5353 if (scan_info->cpi->initiator_id < scan_info->counter) { 5354 scan_info->counter--; 5355 } 5356 } 5357 5358 for (i = 0; i <= max_target; i++) { 5359 cam_status status; 5360 if (i == initiator_id) 5361 continue; 5362 5363 status = xpt_create_path(&path, xpt_periph, 5364 request_ccb->ccb_h.path_id, 5365 i, 0); 5366 if (status != CAM_REQ_CMP) { 5367 kprintf("xpt_scan_bus: xpt_create_path failed" 5368 " with status %#x, bus scan halted\n", 5369 status); 5370 kfree(scan_info, M_CAMXPT); 5371 request_ccb->ccb_h.status = status; 5372 xpt_free_ccb(work_ccb); 5373 xpt_done(request_ccb); 5374 break; 5375 } 5376 work_ccb = xpt_alloc_ccb(); 5377 xpt_setup_ccb(&work_ccb->ccb_h, path, 5378 request_ccb->ccb_h.pinfo.priority); 5379 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5380 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5381 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5382 work_ccb->crcn.flags = request_ccb->crcn.flags; 5383 xpt_action(work_ccb); 5384 } 5385 break; 5386 } 5387 case XPT_SCAN_LUN: 5388 { 5389 cam_status status; 5390 struct cam_path *path; 5391 xpt_scan_bus_info *scan_info; 5392 path_id_t path_id; 5393 target_id_t target_id; 5394 lun_id_t lun_id; 5395 5396 /* Reuse the same CCB to query if a device was really found */ 5397 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5398 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5399 request_ccb->ccb_h.pinfo.priority); 5400 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5401 5402 path_id = request_ccb->ccb_h.path_id; 5403 target_id = request_ccb->ccb_h.target_id; 5404 lun_id = request_ccb->ccb_h.target_lun; 5405 xpt_action(request_ccb); 5406 5407 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5408 struct cam_ed *device; 5409 struct cam_et *target; 5410 int phl; 5411 5412 /* 5413 * If we already probed lun 0 successfully, or 5414 * we have additional configured luns on this 5415 * target that might have "gone away", go onto 5416 * the next lun. 5417 */ 5418 target = request_ccb->ccb_h.path->target; 5419 /* 5420 * We may touch devices that we don't 5421 * hold references too, so ensure they 5422 * don't disappear out from under us. 5423 * The target above is referenced by the 5424 * path in the request ccb. 5425 */ 5426 phl = 0; 5427 device = TAILQ_FIRST(&target->ed_entries); 5428 if (device != NULL) { 5429 phl = CAN_SRCH_HI_SPARSE(device); 5430 if (device->lun_id == 0) 5431 device = TAILQ_NEXT(device, links); 5432 } 5433 if ((lun_id != 0) || (device != NULL)) { 5434 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5435 lun_id++; 5436 } 5437 } else { 5438 struct cam_ed *device; 5439 5440 device = request_ccb->ccb_h.path->device; 5441 5442 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5443 /* Try the next lun */ 5444 if (lun_id < (CAM_SCSI2_MAXLUN-1) 5445 || CAN_SRCH_HI_DENSE(device)) 5446 lun_id++; 5447 } 5448 } 5449 5450 /* 5451 * Free the current request path- we're done with it. 5452 */ 5453 xpt_free_path(request_ccb->ccb_h.path); 5454 5455 /* 5456 * Check to see if we scan any further luns. 5457 */ 5458 if (lun_id == request_ccb->ccb_h.target_lun 5459 || lun_id > scan_info->cpi->max_lun) { 5460 int done; 5461 5462 hop_again: 5463 done = 0; 5464 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5465 scan_info->counter++; 5466 if (scan_info->counter == 5467 scan_info->cpi->initiator_id) { 5468 scan_info->counter++; 5469 } 5470 if (scan_info->counter >= 5471 scan_info->cpi->max_target+1) { 5472 done = 1; 5473 } 5474 } else { 5475 scan_info->counter--; 5476 if (scan_info->counter == 0) { 5477 done = 1; 5478 } 5479 } 5480 if (done) { 5481 xpt_free_ccb(request_ccb); 5482 xpt_free_ccb((union ccb *)scan_info->cpi); 5483 request_ccb = scan_info->request_ccb; 5484 kfree(scan_info, M_CAMXPT); 5485 request_ccb->ccb_h.status = CAM_REQ_CMP; 5486 xpt_done(request_ccb); 5487 break; 5488 } 5489 5490 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { 5491 break; 5492 } 5493 status = xpt_create_path(&path, xpt_periph, 5494 scan_info->request_ccb->ccb_h.path_id, 5495 scan_info->counter, 0); 5496 if (status != CAM_REQ_CMP) { 5497 kprintf("xpt_scan_bus: xpt_create_path failed" 5498 " with status %#x, bus scan halted\n", 5499 status); 5500 xpt_free_ccb(request_ccb); 5501 xpt_free_ccb((union ccb *)scan_info->cpi); 5502 request_ccb = scan_info->request_ccb; 5503 kfree(scan_info, M_CAMXPT); 5504 request_ccb->ccb_h.status = status; 5505 xpt_done(request_ccb); 5506 break; 5507 } 5508 xpt_setup_ccb(&request_ccb->ccb_h, path, 5509 request_ccb->ccb_h.pinfo.priority); 5510 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5511 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5512 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5513 request_ccb->crcn.flags = 5514 scan_info->request_ccb->crcn.flags; 5515 } else { 5516 status = xpt_create_path(&path, xpt_periph, 5517 path_id, target_id, lun_id); 5518 if (status != CAM_REQ_CMP) { 5519 kprintf("xpt_scan_bus: xpt_create_path failed " 5520 "with status %#x, halting LUN scan\n", 5521 status); 5522 goto hop_again; 5523 } 5524 xpt_setup_ccb(&request_ccb->ccb_h, path, 5525 request_ccb->ccb_h.pinfo.priority); 5526 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5527 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5528 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5529 request_ccb->crcn.flags = 5530 scan_info->request_ccb->crcn.flags; 5531 } 5532 xpt_action(request_ccb); 5533 break; 5534 } 5535 default: 5536 break; 5537 } 5538 } 5539 5540 typedef enum { 5541 PROBE_TUR, 5542 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ 5543 PROBE_FULL_INQUIRY, 5544 PROBE_MODE_SENSE, 5545 PROBE_SERIAL_NUM_0, 5546 PROBE_SERIAL_NUM_1, 5547 PROBE_TUR_FOR_NEGOTIATION, 5548 PROBE_INQUIRY_BASIC_DV1, 5549 PROBE_INQUIRY_BASIC_DV2, 5550 PROBE_DV_EXIT, 5551 PROBE_INVALID 5552 } probe_action; 5553 5554 static char *probe_action_text[] = { 5555 "PROBE_TUR", 5556 "PROBE_INQUIRY", 5557 "PROBE_FULL_INQUIRY", 5558 "PROBE_MODE_SENSE", 5559 "PROBE_SERIAL_NUM_0", 5560 "PROBE_SERIAL_NUM_1", 5561 "PROBE_TUR_FOR_NEGOTIATION", 5562 "PROBE_INQUIRY_BASIC_DV1", 5563 "PROBE_INQUIRY_BASIC_DV2", 5564 "PROBE_DV_EXIT", 5565 "PROBE_INVALID" 5566 }; 5567 5568 #define PROBE_SET_ACTION(softc, newaction) \ 5569 do { \ 5570 char **text; \ 5571 text = probe_action_text; \ 5572 CAM_DEBUG((softc)->periph->path, CAM_DEBUG_INFO, \ 5573 ("Probe %s to %s\n", text[(softc)->action], \ 5574 text[(newaction)])); \ 5575 (softc)->action = (newaction); \ 5576 } while(0) 5577 5578 typedef enum { 5579 PROBE_INQUIRY_CKSUM = 0x01, 5580 PROBE_SERIAL_CKSUM = 0x02, 5581 PROBE_NO_ANNOUNCE = 0x04 5582 } probe_flags; 5583 5584 typedef struct { 5585 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5586 probe_action action; 5587 union ccb saved_ccb; 5588 probe_flags flags; 5589 MD5_CTX context; 5590 u_int8_t digest[16]; 5591 struct cam_periph *periph; 5592 } probe_softc; 5593 5594 static void 5595 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5596 cam_flags flags, union ccb *request_ccb) 5597 { 5598 struct ccb_pathinq cpi; 5599 cam_status status; 5600 struct cam_path *new_path; 5601 struct cam_periph *old_periph; 5602 5603 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5604 ("xpt_scan_lun\n")); 5605 5606 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5607 cpi.ccb_h.func_code = XPT_PATH_INQ; 5608 xpt_action((union ccb *)&cpi); 5609 5610 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5611 if (request_ccb != NULL) { 5612 request_ccb->ccb_h.status = cpi.ccb_h.status; 5613 xpt_done(request_ccb); 5614 } 5615 return; 5616 } 5617 5618 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5619 /* 5620 * Can't scan the bus on an adapter that 5621 * cannot perform the initiator role. 5622 */ 5623 if (request_ccb != NULL) { 5624 request_ccb->ccb_h.status = CAM_REQ_CMP; 5625 xpt_done(request_ccb); 5626 } 5627 return; 5628 } 5629 5630 if (request_ccb == NULL) { 5631 request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); 5632 new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); 5633 status = xpt_compile_path(new_path, xpt_periph, 5634 path->bus->path_id, 5635 path->target->target_id, 5636 path->device->lun_id); 5637 5638 if (status != CAM_REQ_CMP) { 5639 xpt_print(path, "xpt_scan_lun: can't compile path, " 5640 "can't continue\n"); 5641 kfree(request_ccb, M_CAMXPT); 5642 kfree(new_path, M_CAMXPT); 5643 return; 5644 } 5645 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5646 request_ccb->ccb_h.cbfcnp = xptscandone; 5647 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5648 request_ccb->crcn.flags = flags; 5649 } 5650 5651 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5652 probe_softc *softc; 5653 5654 softc = (probe_softc *)old_periph->softc; 5655 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5656 periph_links.tqe); 5657 } else { 5658 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5659 probestart, "probe", 5660 CAM_PERIPH_BIO, 5661 request_ccb->ccb_h.path, NULL, 0, 5662 request_ccb); 5663 5664 if (status != CAM_REQ_CMP) { 5665 xpt_print(path, "xpt_scan_lun: cam_alloc_periph " 5666 "returned an error, can't continue probe\n"); 5667 request_ccb->ccb_h.status = status; 5668 xpt_done(request_ccb); 5669 } 5670 } 5671 } 5672 5673 static void 5674 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5675 { 5676 xpt_release_path(done_ccb->ccb_h.path); 5677 kfree(done_ccb->ccb_h.path, M_CAMXPT); 5678 kfree(done_ccb, M_CAMXPT); 5679 } 5680 5681 static cam_status 5682 proberegister(struct cam_periph *periph, void *arg) 5683 { 5684 union ccb *request_ccb; /* CCB representing the probe request */ 5685 cam_status status; 5686 probe_softc *softc; 5687 5688 request_ccb = (union ccb *)arg; 5689 if (periph == NULL) { 5690 kprintf("proberegister: periph was NULL!!\n"); 5691 return(CAM_REQ_CMP_ERR); 5692 } 5693 5694 if (request_ccb == NULL) { 5695 kprintf("proberegister: no probe CCB, " 5696 "can't register device\n"); 5697 return(CAM_REQ_CMP_ERR); 5698 } 5699 5700 softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); 5701 TAILQ_INIT(&softc->request_ccbs); 5702 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5703 periph_links.tqe); 5704 softc->flags = 0; 5705 periph->softc = softc; 5706 softc->periph = periph; 5707 softc->action = PROBE_INVALID; 5708 status = cam_periph_acquire(periph); 5709 if (status != CAM_REQ_CMP) { 5710 return (status); 5711 } 5712 5713 5714 /* 5715 * Ensure we've waited at least a bus settle 5716 * delay before attempting to probe the device. 5717 * For HBAs that don't do bus resets, this won't make a difference. 5718 */ 5719 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5720 scsi_delay); 5721 probeschedule(periph); 5722 return(CAM_REQ_CMP); 5723 } 5724 5725 static void 5726 probeschedule(struct cam_periph *periph) 5727 { 5728 struct ccb_pathinq cpi; 5729 union ccb *ccb; 5730 probe_softc *softc; 5731 5732 softc = (probe_softc *)periph->softc; 5733 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5734 5735 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5736 cpi.ccb_h.func_code = XPT_PATH_INQ; 5737 xpt_action((union ccb *)&cpi); 5738 5739 /* 5740 * If a device has gone away and another device, or the same one, 5741 * is back in the same place, it should have a unit attention 5742 * condition pending. It will not report the unit attention in 5743 * response to an inquiry, which may leave invalid transfer 5744 * negotiations in effect. The TUR will reveal the unit attention 5745 * condition. Only send the TUR for lun 0, since some devices 5746 * will get confused by commands other than inquiry to non-existent 5747 * luns. If you think a device has gone away start your scan from 5748 * lun 0. This will insure that any bogus transfer settings are 5749 * invalidated. 5750 * 5751 * If we haven't seen the device before and the controller supports 5752 * some kind of transfer negotiation, negotiate with the first 5753 * sent command if no bus reset was performed at startup. This 5754 * ensures that the device is not confused by transfer negotiation 5755 * settings left over by loader or BIOS action. 5756 */ 5757 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5758 && (ccb->ccb_h.target_lun == 0)) { 5759 PROBE_SET_ACTION(softc, PROBE_TUR); 5760 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5761 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5762 proberequestdefaultnegotiation(periph); 5763 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 5764 } else { 5765 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 5766 } 5767 5768 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5769 softc->flags |= PROBE_NO_ANNOUNCE; 5770 else 5771 softc->flags &= ~PROBE_NO_ANNOUNCE; 5772 5773 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5774 } 5775 5776 static void 5777 probestart(struct cam_periph *periph, union ccb *start_ccb) 5778 { 5779 /* Probe the device that our peripheral driver points to */ 5780 struct ccb_scsiio *csio; 5781 probe_softc *softc; 5782 5783 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5784 5785 softc = (probe_softc *)periph->softc; 5786 csio = &start_ccb->csio; 5787 5788 switch (softc->action) { 5789 case PROBE_TUR: 5790 case PROBE_TUR_FOR_NEGOTIATION: 5791 case PROBE_DV_EXIT: 5792 { 5793 scsi_test_unit_ready(csio, 5794 /*retries*/4, 5795 probedone, 5796 MSG_SIMPLE_Q_TAG, 5797 SSD_FULL_SIZE, 5798 /*timeout*/60000); 5799 break; 5800 } 5801 case PROBE_INQUIRY: 5802 case PROBE_FULL_INQUIRY: 5803 case PROBE_INQUIRY_BASIC_DV1: 5804 case PROBE_INQUIRY_BASIC_DV2: 5805 { 5806 u_int inquiry_len; 5807 struct scsi_inquiry_data *inq_buf; 5808 5809 inq_buf = &periph->path->device->inq_data; 5810 5811 /* 5812 * If the device is currently configured, we calculate an 5813 * MD5 checksum of the inquiry data, and if the serial number 5814 * length is greater than 0, add the serial number data 5815 * into the checksum as well. Once the inquiry and the 5816 * serial number check finish, we attempt to figure out 5817 * whether we still have the same device. 5818 */ 5819 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5820 5821 MD5Init(&softc->context); 5822 MD5Update(&softc->context, (unsigned char *)inq_buf, 5823 sizeof(struct scsi_inquiry_data)); 5824 softc->flags |= PROBE_INQUIRY_CKSUM; 5825 if (periph->path->device->serial_num_len > 0) { 5826 MD5Update(&softc->context, 5827 periph->path->device->serial_num, 5828 periph->path->device->serial_num_len); 5829 softc->flags |= PROBE_SERIAL_CKSUM; 5830 } 5831 MD5Final(softc->digest, &softc->context); 5832 } 5833 5834 if (softc->action == PROBE_INQUIRY) 5835 inquiry_len = SHORT_INQUIRY_LENGTH; 5836 else 5837 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); 5838 5839 /* 5840 * Some parallel SCSI devices fail to send an 5841 * ignore wide residue message when dealing with 5842 * odd length inquiry requests. Round up to be 5843 * safe. 5844 */ 5845 inquiry_len = roundup2(inquiry_len, 2); 5846 5847 if (softc->action == PROBE_INQUIRY_BASIC_DV1 5848 || softc->action == PROBE_INQUIRY_BASIC_DV2) { 5849 inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); 5850 } 5851 scsi_inquiry(csio, 5852 /*retries*/4, 5853 probedone, 5854 MSG_SIMPLE_Q_TAG, 5855 (u_int8_t *)inq_buf, 5856 inquiry_len, 5857 /*evpd*/FALSE, 5858 /*page_code*/0, 5859 SSD_MIN_SIZE, 5860 /*timeout*/60 * 1000); 5861 break; 5862 } 5863 case PROBE_MODE_SENSE: 5864 { 5865 void *mode_buf; 5866 int mode_buf_len; 5867 5868 mode_buf_len = sizeof(struct scsi_mode_header_6) 5869 + sizeof(struct scsi_mode_blk_desc) 5870 + sizeof(struct scsi_control_page); 5871 mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); 5872 scsi_mode_sense(csio, 5873 /*retries*/4, 5874 probedone, 5875 MSG_SIMPLE_Q_TAG, 5876 /*dbd*/FALSE, 5877 SMS_PAGE_CTRL_CURRENT, 5878 SMS_CONTROL_MODE_PAGE, 5879 mode_buf, 5880 mode_buf_len, 5881 SSD_FULL_SIZE, 5882 /*timeout*/60000); 5883 break; 5884 } 5885 case PROBE_SERIAL_NUM_0: 5886 { 5887 struct scsi_vpd_supported_page_list *vpd_list = NULL; 5888 struct cam_ed *device; 5889 5890 device = periph->path->device; 5891 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5892 vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, 5893 M_INTWAIT | M_ZERO); 5894 } 5895 5896 if (vpd_list != NULL) { 5897 scsi_inquiry(csio, 5898 /*retries*/4, 5899 probedone, 5900 MSG_SIMPLE_Q_TAG, 5901 (u_int8_t *)vpd_list, 5902 sizeof(*vpd_list), 5903 /*evpd*/TRUE, 5904 SVPD_SUPPORTED_PAGE_LIST, 5905 SSD_MIN_SIZE, 5906 /*timeout*/60 * 1000); 5907 break; 5908 } 5909 /* 5910 * We'll have to do without, let our probedone 5911 * routine finish up for us. 5912 */ 5913 start_ccb->csio.data_ptr = NULL; 5914 probedone(periph, start_ccb); 5915 return; 5916 } 5917 case PROBE_SERIAL_NUM_1: 5918 { 5919 struct scsi_vpd_unit_serial_number *serial_buf; 5920 struct cam_ed* device; 5921 5922 serial_buf = NULL; 5923 device = periph->path->device; 5924 device->serial_num = NULL; 5925 device->serial_num_len = 0; 5926 5927 serial_buf = (struct scsi_vpd_unit_serial_number *) 5928 kmalloc(sizeof(*serial_buf), M_CAMXPT, 5929 M_INTWAIT | M_ZERO); 5930 scsi_inquiry(csio, 5931 /*retries*/4, 5932 probedone, 5933 MSG_SIMPLE_Q_TAG, 5934 (u_int8_t *)serial_buf, 5935 sizeof(*serial_buf), 5936 /*evpd*/TRUE, 5937 SVPD_UNIT_SERIAL_NUMBER, 5938 SSD_MIN_SIZE, 5939 /*timeout*/60 * 1000); 5940 break; 5941 } 5942 case PROBE_INVALID: 5943 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 5944 ("probestart: invalid action state\n")); 5945 default: 5946 break; 5947 } 5948 xpt_action(start_ccb); 5949 } 5950 5951 static void 5952 proberequestdefaultnegotiation(struct cam_periph *periph) 5953 { 5954 struct ccb_trans_settings cts; 5955 5956 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5957 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5958 cts.type = CTS_TYPE_USER_SETTINGS; 5959 xpt_action((union ccb *)&cts); 5960 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5961 return; 5962 } 5963 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5964 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5965 xpt_action((union ccb *)&cts); 5966 } 5967 5968 /* 5969 * Backoff Negotiation Code- only pertinent for SPI devices. 5970 */ 5971 static int 5972 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) 5973 { 5974 struct ccb_trans_settings cts; 5975 struct ccb_trans_settings_spi *spi; 5976 5977 memset(&cts, 0, sizeof (cts)); 5978 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5979 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5980 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5981 xpt_action((union ccb *)&cts); 5982 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5983 if (bootverbose) { 5984 xpt_print(periph->path, 5985 "failed to get current device settings\n"); 5986 } 5987 return (0); 5988 } 5989 if (cts.transport != XPORT_SPI) { 5990 if (bootverbose) { 5991 xpt_print(periph->path, "not SPI transport\n"); 5992 } 5993 return (0); 5994 } 5995 spi = &cts.xport_specific.spi; 5996 5997 /* 5998 * We cannot renegotiate sync rate if we don't have one. 5999 */ 6000 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { 6001 if (bootverbose) { 6002 xpt_print(periph->path, "no sync rate known\n"); 6003 } 6004 return (0); 6005 } 6006 6007 /* 6008 * We'll assert that we don't have to touch PPR options- the 6009 * SIM will see what we do with period and offset and adjust 6010 * the PPR options as appropriate. 6011 */ 6012 6013 /* 6014 * A sync rate with unknown or zero offset is nonsensical. 6015 * A sync period of zero means Async. 6016 */ 6017 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 6018 || spi->sync_offset == 0 || spi->sync_period == 0) { 6019 if (bootverbose) { 6020 xpt_print(periph->path, "no sync rate available\n"); 6021 } 6022 return (0); 6023 } 6024 6025 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { 6026 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6027 ("hit async: giving up on DV\n")); 6028 return (0); 6029 } 6030 6031 6032 /* 6033 * Jump sync_period up by one, but stop at 5MHz and fall back to Async. 6034 * We don't try to remember 'last' settings to see if the SIM actually 6035 * gets into the speed we want to set. We check on the SIM telling 6036 * us that a requested speed is bad, but otherwise don't try and 6037 * check the speed due to the asynchronous and handshake nature 6038 * of speed setting. 6039 */ 6040 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; 6041 for (;;) { 6042 spi->sync_period++; 6043 if (spi->sync_period >= 0xf) { 6044 spi->sync_period = 0; 6045 spi->sync_offset = 0; 6046 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6047 ("setting to async for DV\n")); 6048 /* 6049 * Once we hit async, we don't want to try 6050 * any more settings. 6051 */ 6052 device->flags |= CAM_DEV_DV_HIT_BOTTOM; 6053 } else if (bootverbose) { 6054 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6055 ("DV: period 0x%x\n", spi->sync_period)); 6056 kprintf("setting period to 0x%x\n", spi->sync_period); 6057 } 6058 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6059 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6060 xpt_action((union ccb *)&cts); 6061 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6062 break; 6063 } 6064 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6065 ("DV: failed to set period 0x%x\n", spi->sync_period)); 6066 if (spi->sync_period == 0) { 6067 return (0); 6068 } 6069 } 6070 return (1); 6071 } 6072 6073 static void 6074 probedone(struct cam_periph *periph, union ccb *done_ccb) 6075 { 6076 probe_softc *softc; 6077 struct cam_path *path; 6078 u_int32_t priority; 6079 6080 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 6081 6082 softc = (probe_softc *)periph->softc; 6083 path = done_ccb->ccb_h.path; 6084 priority = done_ccb->ccb_h.pinfo.priority; 6085 6086 switch (softc->action) { 6087 case PROBE_TUR: 6088 { 6089 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6090 6091 if (cam_periph_error(done_ccb, 0, 6092 SF_NO_PRINT, NULL) == ERESTART) 6093 return; 6094 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 6095 /* Don't wedge the queue */ 6096 xpt_release_devq(done_ccb->ccb_h.path, 6097 /*count*/1, 6098 /*run_queue*/TRUE); 6099 } 6100 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 6101 xpt_release_ccb(done_ccb); 6102 xpt_schedule(periph, priority); 6103 return; 6104 } 6105 case PROBE_INQUIRY: 6106 case PROBE_FULL_INQUIRY: 6107 { 6108 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6109 struct scsi_inquiry_data *inq_buf; 6110 u_int8_t periph_qual; 6111 6112 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 6113 inq_buf = &path->device->inq_data; 6114 6115 periph_qual = SID_QUAL(inq_buf); 6116 6117 switch(periph_qual) { 6118 case SID_QUAL_LU_CONNECTED: 6119 { 6120 u_int8_t len; 6121 6122 /* 6123 * We conservatively request only 6124 * SHORT_INQUIRY_LEN bytes of inquiry 6125 * information during our first try 6126 * at sending an INQUIRY. If the device 6127 * has more information to give, 6128 * perform a second request specifying 6129 * the amount of information the device 6130 * is willing to give. 6131 */ 6132 len = inq_buf->additional_length 6133 + offsetof(struct scsi_inquiry_data, 6134 additional_length) + 1; 6135 if (softc->action == PROBE_INQUIRY 6136 && len > SHORT_INQUIRY_LENGTH) { 6137 PROBE_SET_ACTION(softc, 6138 PROBE_FULL_INQUIRY); 6139 xpt_release_ccb(done_ccb); 6140 xpt_schedule(periph, priority); 6141 return; 6142 } 6143 6144 xpt_find_quirk(path->device); 6145 6146 xpt_devise_transport(path); 6147 if (INQ_DATA_TQ_ENABLED(inq_buf)) 6148 PROBE_SET_ACTION(softc, PROBE_MODE_SENSE); 6149 else 6150 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0); 6151 6152 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 6153 xpt_reference_device(path->device); 6154 6155 xpt_release_ccb(done_ccb); 6156 xpt_schedule(periph, priority); 6157 return; 6158 } 6159 default: 6160 break; 6161 } 6162 } else if (cam_periph_error(done_ccb, 0, 6163 done_ccb->ccb_h.target_lun > 0 6164 ? SF_RETRY_UA|SF_QUIET_IR|SF_NO_PRINT 6165 : SF_RETRY_UA|SF_NO_PRINT, 6166 &softc->saved_ccb) == ERESTART) { 6167 return; 6168 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6169 /* Don't wedge the queue */ 6170 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6171 /*run_queue*/TRUE); 6172 } 6173 /* 6174 * If we get to this point, we got an error status back 6175 * from the inquiry and the error status doesn't require 6176 * automatically retrying the command. Therefore, the 6177 * inquiry failed. If we had inquiry information before 6178 * for this device, but this latest inquiry command failed, 6179 * the device has probably gone away. If this device isn't 6180 * already marked unconfigured, notify the peripheral 6181 * drivers that this device is no more. 6182 */ 6183 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 6184 /* Send the async notification. */ 6185 xpt_async(AC_LOST_DEVICE, path, NULL); 6186 } 6187 6188 xpt_release_ccb(done_ccb); 6189 break; 6190 } 6191 case PROBE_MODE_SENSE: 6192 { 6193 struct ccb_scsiio *csio; 6194 struct scsi_mode_header_6 *mode_hdr; 6195 6196 csio = &done_ccb->csio; 6197 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 6198 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6199 struct scsi_control_page *page; 6200 u_int8_t *offset; 6201 6202 offset = ((u_int8_t *)&mode_hdr[1]) 6203 + mode_hdr->blk_desc_len; 6204 page = (struct scsi_control_page *)offset; 6205 path->device->queue_flags = page->queue_flags; 6206 } else if (cam_periph_error(done_ccb, 0, 6207 SF_RETRY_UA|SF_NO_PRINT, 6208 &softc->saved_ccb) == ERESTART) { 6209 return; 6210 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6211 /* Don't wedge the queue */ 6212 xpt_release_devq(done_ccb->ccb_h.path, 6213 /*count*/1, /*run_queue*/TRUE); 6214 } 6215 xpt_release_ccb(done_ccb); 6216 kfree(mode_hdr, M_CAMXPT); 6217 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0); 6218 xpt_schedule(periph, priority); 6219 return; 6220 } 6221 case PROBE_SERIAL_NUM_0: 6222 { 6223 struct ccb_scsiio *csio; 6224 struct scsi_vpd_supported_page_list *page_list; 6225 int length, serialnum_supported, i; 6226 6227 serialnum_supported = 0; 6228 csio = &done_ccb->csio; 6229 page_list = 6230 (struct scsi_vpd_supported_page_list *)csio->data_ptr; 6231 6232 if (page_list == NULL) { 6233 /* 6234 * Don't process the command as it was never sent 6235 */ 6236 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6237 && (page_list->length > 0)) { 6238 length = min(page_list->length, 6239 SVPD_SUPPORTED_PAGES_SIZE); 6240 for (i = 0; i < length; i++) { 6241 if (page_list->list[i] == 6242 SVPD_UNIT_SERIAL_NUMBER) { 6243 serialnum_supported = 1; 6244 break; 6245 } 6246 } 6247 } else if (cam_periph_error(done_ccb, 0, 6248 SF_RETRY_UA|SF_NO_PRINT, 6249 &softc->saved_ccb) == ERESTART) { 6250 return; 6251 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6252 /* Don't wedge the queue */ 6253 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6254 /*run_queue*/TRUE); 6255 } 6256 6257 if (page_list != NULL) 6258 kfree(page_list, M_DEVBUF); 6259 6260 if (serialnum_supported) { 6261 xpt_release_ccb(done_ccb); 6262 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_1); 6263 xpt_schedule(periph, priority); 6264 return; 6265 } 6266 6267 csio->data_ptr = NULL; 6268 /* FALLTHROUGH */ 6269 } 6270 6271 case PROBE_SERIAL_NUM_1: 6272 { 6273 struct ccb_scsiio *csio; 6274 struct scsi_vpd_unit_serial_number *serial_buf; 6275 u_int32_t priority; 6276 int changed; 6277 int have_serialnum; 6278 6279 changed = 1; 6280 have_serialnum = 0; 6281 csio = &done_ccb->csio; 6282 priority = done_ccb->ccb_h.pinfo.priority; 6283 serial_buf = 6284 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 6285 6286 /* Clean up from previous instance of this device */ 6287 if (path->device->serial_num != NULL) { 6288 kfree(path->device->serial_num, M_CAMXPT); 6289 path->device->serial_num = NULL; 6290 path->device->serial_num_len = 0; 6291 } 6292 6293 if (serial_buf == NULL) { 6294 /* 6295 * Don't process the command as it was never sent 6296 */ 6297 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6298 && (serial_buf->length > 0)) { 6299 6300 have_serialnum = 1; 6301 path->device->serial_num = 6302 kmalloc((serial_buf->length + 1), 6303 M_CAMXPT, M_INTWAIT); 6304 bcopy(serial_buf->serial_num, 6305 path->device->serial_num, 6306 serial_buf->length); 6307 path->device->serial_num_len = serial_buf->length; 6308 path->device->serial_num[serial_buf->length] = '\0'; 6309 } else if (cam_periph_error(done_ccb, 0, 6310 SF_RETRY_UA|SF_NO_PRINT, 6311 &softc->saved_ccb) == ERESTART) { 6312 return; 6313 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6314 /* Don't wedge the queue */ 6315 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6316 /*run_queue*/TRUE); 6317 } 6318 6319 /* 6320 * Let's see if we have seen this device before. 6321 */ 6322 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 6323 MD5_CTX context; 6324 u_int8_t digest[16]; 6325 6326 MD5Init(&context); 6327 6328 MD5Update(&context, 6329 (unsigned char *)&path->device->inq_data, 6330 sizeof(struct scsi_inquiry_data)); 6331 6332 if (have_serialnum) 6333 MD5Update(&context, serial_buf->serial_num, 6334 serial_buf->length); 6335 6336 MD5Final(digest, &context); 6337 if (bcmp(softc->digest, digest, 16) == 0) 6338 changed = 0; 6339 6340 /* 6341 * XXX Do we need to do a TUR in order to ensure 6342 * that the device really hasn't changed??? 6343 */ 6344 if ((changed != 0) 6345 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 6346 xpt_async(AC_LOST_DEVICE, path, NULL); 6347 } 6348 if (serial_buf != NULL) 6349 kfree(serial_buf, M_CAMXPT); 6350 6351 if (changed != 0) { 6352 /* 6353 * Now that we have all the necessary 6354 * information to safely perform transfer 6355 * negotiations... Controllers don't perform 6356 * any negotiation or tagged queuing until 6357 * after the first XPT_SET_TRAN_SETTINGS ccb is 6358 * received. So, on a new device, just retrieve 6359 * the user settings, and set them as the current 6360 * settings to set the device up. 6361 */ 6362 proberequestdefaultnegotiation(periph); 6363 xpt_release_ccb(done_ccb); 6364 6365 /* 6366 * Perform a TUR to allow the controller to 6367 * perform any necessary transfer negotiation. 6368 */ 6369 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION); 6370 xpt_schedule(periph, priority); 6371 return; 6372 } 6373 xpt_release_ccb(done_ccb); 6374 break; 6375 } 6376 case PROBE_TUR_FOR_NEGOTIATION: 6377 case PROBE_DV_EXIT: 6378 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6379 /* Don't wedge the queue */ 6380 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6381 /*run_queue*/TRUE); 6382 } 6383 6384 xpt_reference_device(path->device); 6385 /* 6386 * Do Domain Validation for lun 0 on devices that claim 6387 * to support Synchronous Transfer modes. 6388 */ 6389 if (softc->action == PROBE_TUR_FOR_NEGOTIATION 6390 && done_ccb->ccb_h.target_lun == 0 6391 && (path->device->inq_data.flags & SID_Sync) != 0 6392 && (path->device->flags & CAM_DEV_IN_DV) == 0) { 6393 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6394 ("Begin Domain Validation\n")); 6395 path->device->flags |= CAM_DEV_IN_DV; 6396 xpt_release_ccb(done_ccb); 6397 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV1); 6398 xpt_schedule(periph, priority); 6399 return; 6400 } 6401 if (softc->action == PROBE_DV_EXIT) { 6402 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6403 ("Leave Domain Validation\n")); 6404 } 6405 path->device->flags &= 6406 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6407 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6408 /* Inform the XPT that a new device has been found */ 6409 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6410 xpt_action(done_ccb); 6411 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6412 done_ccb); 6413 } 6414 xpt_release_ccb(done_ccb); 6415 break; 6416 case PROBE_INQUIRY_BASIC_DV1: 6417 case PROBE_INQUIRY_BASIC_DV2: 6418 { 6419 struct scsi_inquiry_data *nbuf; 6420 struct ccb_scsiio *csio; 6421 6422 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6423 /* Don't wedge the queue */ 6424 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6425 /*run_queue*/TRUE); 6426 } 6427 csio = &done_ccb->csio; 6428 nbuf = (struct scsi_inquiry_data *)csio->data_ptr; 6429 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { 6430 xpt_print(path, 6431 "inquiry data fails comparison at DV%d step\n", 6432 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); 6433 if (proberequestbackoff(periph, path->device)) { 6434 path->device->flags &= ~CAM_DEV_IN_DV; 6435 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION); 6436 } else { 6437 /* give up */ 6438 PROBE_SET_ACTION(softc, PROBE_DV_EXIT); 6439 } 6440 kfree(nbuf, M_CAMXPT); 6441 xpt_release_ccb(done_ccb); 6442 xpt_schedule(periph, priority); 6443 return; 6444 } 6445 kfree(nbuf, M_CAMXPT); 6446 if (softc->action == PROBE_INQUIRY_BASIC_DV1) { 6447 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV2); 6448 xpt_release_ccb(done_ccb); 6449 xpt_schedule(periph, priority); 6450 return; 6451 } 6452 if (softc->action == PROBE_DV_EXIT) { 6453 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6454 ("Leave Domain Validation Successfully\n")); 6455 } 6456 path->device->flags &= 6457 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6458 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6459 /* Inform the XPT that a new device has been found */ 6460 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6461 xpt_action(done_ccb); 6462 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6463 done_ccb); 6464 } 6465 xpt_release_ccb(done_ccb); 6466 break; 6467 } 6468 case PROBE_INVALID: 6469 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_INFO, 6470 ("probedone: invalid action state\n")); 6471 default: 6472 break; 6473 } 6474 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 6475 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 6476 done_ccb->ccb_h.status = CAM_REQ_CMP; 6477 xpt_done(done_ccb); 6478 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 6479 cam_periph_invalidate(periph); 6480 cam_periph_release(periph); 6481 } else { 6482 probeschedule(periph); 6483 } 6484 } 6485 6486 static void 6487 probecleanup(struct cam_periph *periph) 6488 { 6489 kfree(periph->softc, M_CAMXPT); 6490 } 6491 6492 static void 6493 xpt_find_quirk(struct cam_ed *device) 6494 { 6495 caddr_t match; 6496 6497 match = cam_quirkmatch((caddr_t)&device->inq_data, 6498 (caddr_t)xpt_quirk_table, 6499 NELEM(xpt_quirk_table), 6500 sizeof(*xpt_quirk_table), scsi_inquiry_match); 6501 6502 if (match == NULL) 6503 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 6504 6505 device->quirk = (struct xpt_quirk_entry *)match; 6506 } 6507 6508 static int 6509 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) 6510 { 6511 int error, lbool; 6512 6513 lbool = cam_srch_hi; 6514 error = sysctl_handle_int(oidp, &lbool, 0, req); 6515 if (error != 0 || req->newptr == NULL) 6516 return (error); 6517 if (lbool == 0 || lbool == 1) { 6518 cam_srch_hi = lbool; 6519 return (0); 6520 } else { 6521 return (EINVAL); 6522 } 6523 } 6524 6525 static void 6526 xpt_devise_transport(struct cam_path *path) 6527 { 6528 struct ccb_pathinq cpi; 6529 struct ccb_trans_settings cts; 6530 struct scsi_inquiry_data *inq_buf; 6531 6532 /* Get transport information from the SIM */ 6533 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 6534 cpi.ccb_h.func_code = XPT_PATH_INQ; 6535 xpt_action((union ccb *)&cpi); 6536 6537 inq_buf = NULL; 6538 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 6539 inq_buf = &path->device->inq_data; 6540 path->device->protocol = PROTO_SCSI; 6541 path->device->protocol_version = 6542 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 6543 path->device->transport = cpi.transport; 6544 path->device->transport_version = cpi.transport_version; 6545 6546 /* 6547 * Any device not using SPI3 features should 6548 * be considered SPI2 or lower. 6549 */ 6550 if (inq_buf != NULL) { 6551 if (path->device->transport == XPORT_SPI 6552 && (inq_buf->spi3data & SID_SPI_MASK) == 0 6553 && path->device->transport_version > 2) 6554 path->device->transport_version = 2; 6555 } else { 6556 struct cam_ed* otherdev; 6557 6558 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 6559 otherdev != NULL; 6560 otherdev = TAILQ_NEXT(otherdev, links)) { 6561 if (otherdev != path->device) 6562 break; 6563 } 6564 6565 if (otherdev != NULL) { 6566 /* 6567 * Initially assume the same versioning as 6568 * prior luns for this target. 6569 */ 6570 path->device->protocol_version = 6571 otherdev->protocol_version; 6572 path->device->transport_version = 6573 otherdev->transport_version; 6574 } else { 6575 /* Until we know better, opt for safty */ 6576 path->device->protocol_version = 2; 6577 if (path->device->transport == XPORT_SPI) 6578 path->device->transport_version = 2; 6579 else 6580 path->device->transport_version = 0; 6581 } 6582 } 6583 6584 /* 6585 * XXX 6586 * For a device compliant with SPC-2 we should be able 6587 * to determine the transport version supported by 6588 * scrutinizing the version descriptors in the 6589 * inquiry buffer. 6590 */ 6591 6592 /* Tell the controller what we think */ 6593 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 6594 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6595 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6596 cts.transport = path->device->transport; 6597 cts.transport_version = path->device->transport_version; 6598 cts.protocol = path->device->protocol; 6599 cts.protocol_version = path->device->protocol_version; 6600 cts.proto_specific.valid = 0; 6601 cts.xport_specific.valid = 0; 6602 xpt_action((union ccb *)&cts); 6603 } 6604 6605 static void 6606 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6607 int async_update) 6608 { 6609 struct ccb_pathinq cpi; 6610 struct ccb_trans_settings cur_cts; 6611 struct ccb_trans_settings_scsi *scsi; 6612 struct ccb_trans_settings_scsi *cur_scsi; 6613 struct cam_sim *sim; 6614 struct scsi_inquiry_data *inq_data; 6615 6616 if (device == NULL) { 6617 cts->ccb_h.status = CAM_PATH_INVALID; 6618 xpt_done((union ccb *)cts); 6619 return; 6620 } 6621 6622 if (cts->protocol == PROTO_UNKNOWN 6623 || cts->protocol == PROTO_UNSPECIFIED) { 6624 cts->protocol = device->protocol; 6625 cts->protocol_version = device->protocol_version; 6626 } 6627 6628 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 6629 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 6630 cts->protocol_version = device->protocol_version; 6631 6632 if (cts->protocol != device->protocol) { 6633 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", 6634 cts->protocol, device->protocol); 6635 cts->protocol = device->protocol; 6636 } 6637 6638 if (cts->protocol_version > device->protocol_version) { 6639 if (bootverbose) { 6640 xpt_print(cts->ccb_h.path, "Down reving Protocol " 6641 "Version from %d to %d?\n", cts->protocol_version, 6642 device->protocol_version); 6643 } 6644 cts->protocol_version = device->protocol_version; 6645 } 6646 6647 if (cts->transport == XPORT_UNKNOWN 6648 || cts->transport == XPORT_UNSPECIFIED) { 6649 cts->transport = device->transport; 6650 cts->transport_version = device->transport_version; 6651 } 6652 6653 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6654 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6655 cts->transport_version = device->transport_version; 6656 6657 if (cts->transport != device->transport) { 6658 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", 6659 cts->transport, device->transport); 6660 cts->transport = device->transport; 6661 } 6662 6663 if (cts->transport_version > device->transport_version) { 6664 if (bootverbose) { 6665 xpt_print(cts->ccb_h.path, "Down reving Transport " 6666 "Version from %d to %d?\n", cts->transport_version, 6667 device->transport_version); 6668 } 6669 cts->transport_version = device->transport_version; 6670 } 6671 6672 sim = cts->ccb_h.path->bus->sim; 6673 6674 /* 6675 * Nothing more of interest to do unless 6676 * this is a device connected via the 6677 * SCSI protocol. 6678 */ 6679 if (cts->protocol != PROTO_SCSI) { 6680 if (async_update == FALSE) 6681 (*(sim->sim_action))(sim, (union ccb *)cts); 6682 return; 6683 } 6684 6685 inq_data = &device->inq_data; 6686 scsi = &cts->proto_specific.scsi; 6687 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6688 cpi.ccb_h.func_code = XPT_PATH_INQ; 6689 xpt_action((union ccb *)&cpi); 6690 6691 /* SCSI specific sanity checking */ 6692 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6693 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 6694 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6695 || (device->quirk->mintags == 0)) { 6696 /* 6697 * Can't tag on hardware that doesn't support tags, 6698 * doesn't have it enabled, or has broken tag support. 6699 */ 6700 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6701 } 6702 6703 if (async_update == FALSE) { 6704 /* 6705 * Perform sanity checking against what the 6706 * controller and device can do. 6707 */ 6708 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6709 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6710 cur_cts.type = cts->type; 6711 xpt_action((union ccb *)&cur_cts); 6712 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6713 return; 6714 } 6715 cur_scsi = &cur_cts.proto_specific.scsi; 6716 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6717 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6718 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6719 } 6720 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6721 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6722 } 6723 6724 /* SPI specific sanity checking */ 6725 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6726 u_int spi3caps; 6727 struct ccb_trans_settings_spi *spi; 6728 struct ccb_trans_settings_spi *cur_spi; 6729 6730 spi = &cts->xport_specific.spi; 6731 6732 cur_spi = &cur_cts.xport_specific.spi; 6733 6734 /* Fill in any gaps in what the user gave us */ 6735 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6736 spi->sync_period = cur_spi->sync_period; 6737 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6738 spi->sync_period = 0; 6739 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6740 spi->sync_offset = cur_spi->sync_offset; 6741 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6742 spi->sync_offset = 0; 6743 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6744 spi->ppr_options = cur_spi->ppr_options; 6745 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6746 spi->ppr_options = 0; 6747 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6748 spi->bus_width = cur_spi->bus_width; 6749 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6750 spi->bus_width = 0; 6751 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6752 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6753 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6754 } 6755 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6756 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6757 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6758 && (inq_data->flags & SID_Sync) == 0 6759 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6760 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)) { 6761 /* Force async */ 6762 spi->sync_period = 0; 6763 spi->sync_offset = 0; 6764 } 6765 6766 switch (spi->bus_width) { 6767 case MSG_EXT_WDTR_BUS_32_BIT: 6768 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6769 || (inq_data->flags & SID_WBus32) != 0 6770 || cts->type == CTS_TYPE_USER_SETTINGS) 6771 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6772 break; 6773 /* Fall Through to 16-bit */ 6774 case MSG_EXT_WDTR_BUS_16_BIT: 6775 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6776 || (inq_data->flags & SID_WBus16) != 0 6777 || cts->type == CTS_TYPE_USER_SETTINGS) 6778 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6779 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6780 break; 6781 } 6782 /* Fall Through to 8-bit */ 6783 default: /* New bus width?? */ 6784 case MSG_EXT_WDTR_BUS_8_BIT: 6785 /* All targets can do this */ 6786 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6787 break; 6788 } 6789 6790 spi3caps = cpi.xport_specific.spi.ppr_options; 6791 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6792 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6793 spi3caps &= inq_data->spi3data; 6794 6795 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6796 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6797 6798 if ((spi3caps & SID_SPI_IUS) == 0) 6799 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6800 6801 if ((spi3caps & SID_SPI_QAS) == 0) 6802 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6803 6804 /* No SPI Transfer settings are allowed unless we are wide */ 6805 if (spi->bus_width == 0) 6806 spi->ppr_options = 0; 6807 6808 if ((spi->valid & CTS_SPI_VALID_DISC) 6809 && ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0)) { 6810 /* 6811 * Can't tag queue without disconnection. 6812 */ 6813 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6814 scsi->valid |= CTS_SCSI_VALID_TQ; 6815 } 6816 6817 /* 6818 * If we are currently performing tagged transactions to 6819 * this device and want to change its negotiation parameters, 6820 * go non-tagged for a bit to give the controller a chance to 6821 * negotiate unhampered by tag messages. 6822 */ 6823 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6824 && (device->inq_flags & SID_CmdQue) != 0 6825 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6826 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6827 CTS_SPI_VALID_SYNC_OFFSET| 6828 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6829 xpt_toggle_tags(cts->ccb_h.path); 6830 } 6831 6832 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6833 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6834 int device_tagenb; 6835 6836 /* 6837 * If we are transitioning from tags to no-tags or 6838 * vice-versa, we need to carefully freeze and restart 6839 * the queue so that we don't overlap tagged and non-tagged 6840 * commands. We also temporarily stop tags if there is 6841 * a change in transfer negotiation settings to allow 6842 * "tag-less" negotiation. 6843 */ 6844 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6845 || (device->inq_flags & SID_CmdQue) != 0) 6846 device_tagenb = TRUE; 6847 else 6848 device_tagenb = FALSE; 6849 6850 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6851 && device_tagenb == FALSE) 6852 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6853 && device_tagenb == TRUE)) { 6854 6855 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6856 /* 6857 * Delay change to use tags until after a 6858 * few commands have gone to this device so 6859 * the controller has time to perform transfer 6860 * negotiations without tagged messages getting 6861 * in the way. 6862 */ 6863 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6864 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6865 } else { 6866 struct ccb_relsim crs; 6867 6868 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6869 device->inq_flags &= ~SID_CmdQue; 6870 xpt_dev_ccbq_resize(cts->ccb_h.path, 6871 sim->max_dev_openings); 6872 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6873 device->tag_delay_count = 0; 6874 6875 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6876 /*priority*/1); 6877 crs.ccb_h.func_code = XPT_REL_SIMQ; 6878 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6879 crs.openings 6880 = crs.release_timeout 6881 = crs.qfrozen_cnt 6882 = 0; 6883 xpt_action((union ccb *)&crs); 6884 } 6885 } 6886 } 6887 if (async_update == FALSE) 6888 (*(sim->sim_action))(sim, (union ccb *)cts); 6889 } 6890 6891 static void 6892 xpt_toggle_tags(struct cam_path *path) 6893 { 6894 struct cam_ed *dev; 6895 6896 /* 6897 * Give controllers a chance to renegotiate 6898 * before starting tag operations. We 6899 * "toggle" tagged queuing off then on 6900 * which causes the tag enable command delay 6901 * counter to come into effect. 6902 */ 6903 dev = path->device; 6904 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6905 || ((dev->inq_flags & SID_CmdQue) != 0 6906 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6907 struct ccb_trans_settings cts; 6908 6909 xpt_setup_ccb(&cts.ccb_h, path, 1); 6910 cts.protocol = PROTO_SCSI; 6911 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6912 cts.transport = XPORT_UNSPECIFIED; 6913 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6914 cts.proto_specific.scsi.flags = 0; 6915 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6916 xpt_set_transfer_settings(&cts, path->device, 6917 /*async_update*/TRUE); 6918 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6919 xpt_set_transfer_settings(&cts, path->device, 6920 /*async_update*/TRUE); 6921 } 6922 } 6923 6924 static void 6925 xpt_start_tags(struct cam_path *path) 6926 { 6927 struct ccb_relsim crs; 6928 struct cam_ed *device; 6929 struct cam_sim *sim; 6930 int newopenings; 6931 6932 device = path->device; 6933 sim = path->bus->sim; 6934 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6935 xpt_freeze_devq(path, /*count*/1); 6936 device->inq_flags |= SID_CmdQue; 6937 if (device->tag_saved_openings != 0) 6938 newopenings = device->tag_saved_openings; 6939 else 6940 newopenings = min(device->quirk->maxtags, 6941 sim->max_tagged_dev_openings); 6942 xpt_dev_ccbq_resize(path, newopenings); 6943 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6944 crs.ccb_h.func_code = XPT_REL_SIMQ; 6945 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6946 crs.openings 6947 = crs.release_timeout 6948 = crs.qfrozen_cnt 6949 = 0; 6950 xpt_action((union ccb *)&crs); 6951 } 6952 6953 static int busses_to_config; 6954 static int busses_to_reset; 6955 6956 static int 6957 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6958 { 6959 sim_lock_assert_owned(bus->sim->lock); 6960 6961 if (bus->counted_to_config == 0 && bus->path_id != CAM_XPT_PATH_ID) { 6962 struct cam_path path; 6963 struct ccb_pathinq cpi; 6964 int can_negotiate; 6965 6966 if (bootverbose) { 6967 kprintf("CAM: Configuring bus:"); 6968 if (bus->sim) { 6969 kprintf(" %s%d\n", 6970 bus->sim->sim_name, 6971 bus->sim->unit_number); 6972 } else { 6973 kprintf(" (unknown)\n"); 6974 } 6975 } 6976 atomic_add_int(&busses_to_config, 1); 6977 bus->counted_to_config = 1; 6978 xpt_compile_path(&path, NULL, bus->path_id, 6979 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6980 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6981 cpi.ccb_h.func_code = XPT_PATH_INQ; 6982 xpt_action((union ccb *)&cpi); 6983 can_negotiate = cpi.hba_inquiry; 6984 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6985 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 && can_negotiate) 6986 busses_to_reset++; 6987 xpt_release_path(&path); 6988 } else 6989 if (bus->counted_to_config == 0 && bus->path_id == CAM_XPT_PATH_ID) { 6990 /* this is our dummy periph/bus */ 6991 atomic_add_int(&busses_to_config, 1); 6992 bus->counted_to_config = 1; 6993 } 6994 6995 return(1); 6996 } 6997 6998 static int 6999 xptconfigfunc(struct cam_eb *bus, void *arg) 7000 { 7001 struct cam_path *path; 7002 union ccb *work_ccb; 7003 7004 sim_lock_assert_owned(bus->sim->lock); 7005 7006 if (bus->path_id != CAM_XPT_PATH_ID) { 7007 cam_status status; 7008 int can_negotiate; 7009 7010 work_ccb = xpt_alloc_ccb(); 7011 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 7012 CAM_TARGET_WILDCARD, 7013 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 7014 kprintf("xptconfigfunc: xpt_create_path failed with " 7015 "status %#x for bus %d\n", status, bus->path_id); 7016 kprintf("xptconfigfunc: halting bus configuration\n"); 7017 xpt_free_ccb(work_ccb); 7018 xpt_uncount_bus(bus); 7019 return(0); 7020 } 7021 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 7022 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 7023 xpt_action(work_ccb); 7024 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 7025 kprintf("xptconfigfunc: CPI failed on bus %d " 7026 "with status %d\n", bus->path_id, 7027 work_ccb->ccb_h.status); 7028 xpt_finishconfig(xpt_periph, work_ccb); 7029 return(1); 7030 } 7031 7032 can_negotiate = work_ccb->cpi.hba_inquiry; 7033 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 7034 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 7035 && (can_negotiate != 0)) { 7036 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 7037 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 7038 work_ccb->ccb_h.cbfcnp = NULL; 7039 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 7040 ("Resetting Bus\n")); 7041 xpt_action(work_ccb); 7042 xpt_finishconfig(xpt_periph, work_ccb); 7043 } else { 7044 /* Act as though we performed a successful BUS RESET */ 7045 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 7046 xpt_finishconfig(xpt_periph, work_ccb); 7047 } 7048 } else { 7049 xpt_uncount_bus(bus); 7050 } 7051 7052 return(1); 7053 } 7054 7055 /* 7056 * Now that interrupts are enabled, go find our devices. 7057 * 7058 * This hook function is called once by run_interrupt_driven_config_hooks(). 7059 * XPT is expected to disestablish its hook when done. 7060 */ 7061 static void 7062 xpt_config(void *arg) 7063 { 7064 7065 #ifdef CAMDEBUG 7066 /* Setup debugging flags and path */ 7067 #ifdef CAM_DEBUG_FLAGS 7068 cam_dflags = CAM_DEBUG_FLAGS; 7069 #else /* !CAM_DEBUG_FLAGS */ 7070 cam_dflags = CAM_DEBUG_NONE; 7071 #endif /* CAM_DEBUG_FLAGS */ 7072 #ifdef CAM_DEBUG_BUS 7073 if (cam_dflags != CAM_DEBUG_NONE) { 7074 /* 7075 * Locking is specifically omitted here. No SIMs have 7076 * registered yet, so xpt_create_path will only be searching 7077 * empty lists of targets and devices. 7078 */ 7079 if (xpt_create_path(&cam_dpath, xpt_periph, 7080 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 7081 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 7082 kprintf("xpt_config: xpt_create_path() failed for debug" 7083 " target %d:%d:%d, debugging disabled\n", 7084 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 7085 cam_dflags = CAM_DEBUG_NONE; 7086 } 7087 } else { 7088 cam_dpath = NULL; 7089 } 7090 #else /* !CAM_DEBUG_BUS */ 7091 cam_dpath = NULL; 7092 #endif /* CAM_DEBUG_BUS */ 7093 #endif /* CAMDEBUG */ 7094 7095 /* 7096 * Scan all installed busses. This will also add a count 7097 * for our dummy placeholder (xpt_periph). 7098 */ 7099 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 7100 7101 kprintf("CAM: Configuring %d busses\n", busses_to_config - 1); 7102 if (busses_to_reset > 0 && scsi_delay >= 2000) { 7103 kprintf("Waiting %d seconds for SCSI " 7104 "devices to settle\n", 7105 scsi_delay/1000); 7106 } 7107 xpt_for_all_busses(xptconfigfunc, NULL); 7108 } 7109 7110 /* 7111 * If the given device only has one peripheral attached to it, and if that 7112 * peripheral is the passthrough driver, announce it. This insures that the 7113 * user sees some sort of announcement for every peripheral in their system. 7114 */ 7115 static int 7116 xptpassannouncefunc(struct cam_ed *device, void *arg) 7117 { 7118 struct cam_periph *periph; 7119 int i; 7120 7121 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 7122 periph = SLIST_NEXT(periph, periph_links), i++); 7123 7124 periph = SLIST_FIRST(&device->periphs); 7125 if ((i == 1) 7126 && (strncmp(periph->periph_name, "pass", 4) == 0)) 7127 xpt_announce_periph(periph, NULL); 7128 7129 return(1); 7130 } 7131 7132 static void 7133 xpt_finishconfig_task(void *context, int pending) 7134 { 7135 struct periph_driver **p_drv; 7136 int i; 7137 7138 kprintf("CAM: finished configuring all busses\n"); 7139 7140 if (busses_to_config == 0) { 7141 /* Register all the peripheral drivers */ 7142 /* XXX This will have to change when we have loadable modules */ 7143 p_drv = periph_drivers; 7144 for (i = 0; p_drv[i] != NULL; i++) { 7145 (*p_drv[i]->init)(); 7146 } 7147 7148 /* 7149 * Check for devices with no "standard" peripheral driver 7150 * attached. For any devices like that, announce the 7151 * passthrough driver so the user will see something. 7152 */ 7153 xpt_for_all_devices(xptpassannouncefunc, NULL); 7154 7155 /* Release our hook so that the boot can continue. */ 7156 config_intrhook_disestablish(xsoftc.xpt_config_hook); 7157 kfree(xsoftc.xpt_config_hook, M_CAMXPT); 7158 xsoftc.xpt_config_hook = NULL; 7159 } 7160 kfree(context, M_CAMXPT); 7161 } 7162 7163 static void 7164 xpt_uncount_bus (struct cam_eb *bus) 7165 { 7166 struct xpt_task *task; 7167 7168 if (bus->counted_to_config) { 7169 bus->counted_to_config = 0; 7170 if (atomic_fetchadd_int(&busses_to_config, -1) == 1) { 7171 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 7172 M_INTWAIT | M_ZERO); 7173 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 7174 taskqueue_enqueue(taskqueue_thread[mycpuid], 7175 &task->task); 7176 } 7177 } 7178 } 7179 7180 static void 7181 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 7182 { 7183 struct cam_path *path; 7184 7185 path = done_ccb->ccb_h.path; 7186 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_finishconfig\n")); 7187 7188 switch(done_ccb->ccb_h.func_code) { 7189 case XPT_RESET_BUS: 7190 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 7191 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 7192 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 7193 done_ccb->crcn.flags = 0; 7194 xpt_action(done_ccb); 7195 return; 7196 } 7197 /* FALLTHROUGH */ 7198 case XPT_SCAN_BUS: 7199 default: 7200 if (bootverbose) { 7201 kprintf("CAM: Finished configuring bus:"); 7202 if (path->bus->sim) { 7203 kprintf(" %s%d\n", 7204 path->bus->sim->sim_name, 7205 path->bus->sim->unit_number); 7206 } else { 7207 kprintf(" (unknown)\n"); 7208 } 7209 } 7210 xpt_uncount_bus(path->bus); 7211 xpt_free_path(path); 7212 xpt_free_ccb(done_ccb); 7213 break; 7214 } 7215 } 7216 7217 cam_status 7218 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 7219 struct cam_path *path) 7220 { 7221 struct ccb_setasync csa; 7222 cam_status status; 7223 int xptpath = 0; 7224 7225 if (path == NULL) { 7226 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7227 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 7228 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 7229 if (status != CAM_REQ_CMP) { 7230 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7231 return (status); 7232 } 7233 xptpath = 1; 7234 } 7235 7236 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 7237 csa.ccb_h.func_code = XPT_SASYNC_CB; 7238 csa.event_enable = event; 7239 csa.callback = cbfunc; 7240 csa.callback_arg = cbarg; 7241 xpt_action((union ccb *)&csa); 7242 status = csa.ccb_h.status; 7243 if (xptpath) { 7244 xpt_free_path(path); 7245 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7246 } 7247 return (status); 7248 } 7249 7250 static void 7251 xptaction(struct cam_sim *sim, union ccb *work_ccb) 7252 { 7253 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 7254 7255 switch (work_ccb->ccb_h.func_code) { 7256 /* Common cases first */ 7257 case XPT_PATH_INQ: /* Path routing inquiry */ 7258 { 7259 struct ccb_pathinq *cpi; 7260 7261 cpi = &work_ccb->cpi; 7262 cpi->version_num = 1; /* XXX??? */ 7263 cpi->hba_inquiry = 0; 7264 cpi->target_sprt = 0; 7265 cpi->hba_misc = 0; 7266 cpi->hba_eng_cnt = 0; 7267 cpi->max_target = 0; 7268 cpi->max_lun = 0; 7269 cpi->initiator_id = 0; 7270 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 7271 strncpy(cpi->hba_vid, "", HBA_IDLEN); 7272 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 7273 cpi->unit_number = sim->unit_number; 7274 cpi->bus_id = sim->bus_id; 7275 cpi->base_transfer_speed = 0; 7276 cpi->protocol = PROTO_UNSPECIFIED; 7277 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 7278 cpi->transport = XPORT_UNSPECIFIED; 7279 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 7280 cpi->ccb_h.status = CAM_REQ_CMP; 7281 xpt_done(work_ccb); 7282 break; 7283 } 7284 default: 7285 work_ccb->ccb_h.status = CAM_REQ_INVALID; 7286 xpt_done(work_ccb); 7287 break; 7288 } 7289 } 7290 7291 /* 7292 * The xpt as a "controller" has no interrupt sources, so polling 7293 * is a no-op. 7294 */ 7295 static void 7296 xptpoll(struct cam_sim *sim) 7297 { 7298 } 7299 7300 void 7301 xpt_lock_buses(void) 7302 { 7303 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 7304 } 7305 7306 void 7307 xpt_unlock_buses(void) 7308 { 7309 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 7310 } 7311 7312 7313 /* 7314 * Should only be called by the machine interrupt dispatch routines, 7315 * so put these prototypes here instead of in the header. 7316 */ 7317 7318 static void 7319 swi_cambio(void *arg, void *frame) 7320 { 7321 camisr(NULL); 7322 } 7323 7324 static void 7325 camisr(void *dummy) 7326 { 7327 cam_simq_t queue; 7328 struct cam_sim *sim; 7329 7330 spin_lock(&cam_simq_spin); 7331 TAILQ_INIT(&queue); 7332 TAILQ_CONCAT(&queue, &cam_simq, links); 7333 spin_unlock(&cam_simq_spin); 7334 7335 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 7336 TAILQ_REMOVE(&queue, sim, links); 7337 CAM_SIM_LOCK(sim); 7338 sim->flags &= ~CAM_SIM_ON_DONEQ; 7339 camisr_runqueue(sim); 7340 CAM_SIM_UNLOCK(sim); 7341 } 7342 } 7343 7344 static void 7345 camisr_runqueue(struct cam_sim *sim) 7346 { 7347 struct ccb_hdr *ccb_h; 7348 int runq; 7349 7350 spin_lock(&sim->sim_spin); 7351 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { 7352 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); 7353 spin_unlock(&sim->sim_spin); 7354 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 7355 7356 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 7357 ("camisr\n")); 7358 7359 runq = FALSE; 7360 7361 if (ccb_h->flags & CAM_HIGH_POWER) { 7362 struct highpowerlist *hphead; 7363 union ccb *send_ccb; 7364 7365 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7366 hphead = &xsoftc.highpowerq; 7367 7368 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 7369 7370 /* 7371 * Increment the count since this command is done. 7372 */ 7373 xsoftc.num_highpower++; 7374 7375 /* 7376 * Any high powered commands queued up? 7377 */ 7378 if (send_ccb != NULL) { 7379 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 7380 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7381 7382 xpt_release_devq(send_ccb->ccb_h.path, 7383 /*count*/1, /*runqueue*/TRUE); 7384 } else 7385 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7386 } 7387 7388 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 7389 struct cam_ed *dev; 7390 7391 dev = ccb_h->path->device; 7392 7393 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 7394 7395 /* 7396 * devq may be NULL if this is cam_dead_sim 7397 */ 7398 if (ccb_h->path->bus->sim->devq) { 7399 ccb_h->path->bus->sim->devq->send_active--; 7400 ccb_h->path->bus->sim->devq->send_openings++; 7401 } 7402 7403 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 7404 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 7405 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 7406 && (dev->ccbq.dev_active == 0))) { 7407 7408 xpt_release_devq(ccb_h->path, /*count*/1, 7409 /*run_queue*/TRUE); 7410 } 7411 7412 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 7413 && (--dev->tag_delay_count == 0)) 7414 xpt_start_tags(ccb_h->path); 7415 7416 if ((dev->ccbq.queue.entries > 0) 7417 && (dev->qfrozen_cnt == 0) 7418 && (device_is_send_queued(dev) == 0)) { 7419 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 7420 dev); 7421 } 7422 } 7423 7424 if (ccb_h->status & CAM_RELEASE_SIMQ) { 7425 xpt_release_simq(ccb_h->path->bus->sim, 7426 /*run_queue*/TRUE); 7427 ccb_h->status &= ~CAM_RELEASE_SIMQ; 7428 runq = FALSE; 7429 } 7430 7431 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 7432 && (ccb_h->status & CAM_DEV_QFRZN)) { 7433 xpt_release_devq(ccb_h->path, /*count*/1, 7434 /*run_queue*/TRUE); 7435 ccb_h->status &= ~CAM_DEV_QFRZN; 7436 } else if (runq) { 7437 xpt_run_dev_sendq(ccb_h->path->bus); 7438 } 7439 7440 /* Call the peripheral driver's callback */ 7441 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 7442 spin_lock(&sim->sim_spin); 7443 } 7444 spin_unlock(&sim->sim_spin); 7445 } 7446 7447 /* 7448 * The dead_sim isn't completely hooked into CAM, we have to make sure 7449 * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() 7450 * doesn't block. 7451 */ 7452 static void 7453 dead_sim_action(struct cam_sim *sim, union ccb *ccb) 7454 { 7455 7456 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 7457 xpt_done(ccb); 7458 camisr_runqueue(sim); 7459 } 7460 7461 static void 7462 dead_sim_poll(struct cam_sim *sim) 7463 { 7464 } 7465