1 /* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ 30 * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.68 2008/08/23 17:13:31 pavalos Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/md5.h> 42 #include <sys/devicestat.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/taskqueue.h> 46 #include <sys/bus.h> 47 #include <sys/thread.h> 48 #include <sys/lock.h> 49 #include <sys/spinlock.h> 50 #include <sys/thread2.h> 51 #include <sys/spinlock2.h> 52 53 #include <machine/clock.h> 54 #include <machine/stdarg.h> 55 56 #include "cam.h" 57 #include "cam_ccb.h" 58 #include "cam_periph.h" 59 #include "cam_sim.h" 60 #include "cam_xpt.h" 61 #include "cam_xpt_sim.h" 62 #include "cam_xpt_periph.h" 63 #include "cam_debug.h" 64 65 #include "scsi/scsi_all.h" 66 #include "scsi/scsi_message.h" 67 #include "scsi/scsi_pass.h" 68 #include <sys/kthread.h> 69 #include "opt_cam.h" 70 71 /* Datastructures internal to the xpt layer */ 72 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 73 74 /* Object for defering XPT actions to a taskqueue */ 75 struct xpt_task { 76 struct task task; 77 void *data1; 78 uintptr_t data2; 79 }; 80 81 /* 82 * Definition of an async handler callback block. These are used to add 83 * SIMs and peripherals to the async callback lists. 84 */ 85 struct async_node { 86 SLIST_ENTRY(async_node) links; 87 u_int32_t event_enable; /* Async Event enables */ 88 void (*callback)(void *arg, u_int32_t code, 89 struct cam_path *path, void *args); 90 void *callback_arg; 91 }; 92 93 SLIST_HEAD(async_list, async_node); 94 SLIST_HEAD(periph_list, cam_periph); 95 96 /* 97 * This is the maximum number of high powered commands (e.g. start unit) 98 * that can be outstanding at a particular time. 99 */ 100 #ifndef CAM_MAX_HIGHPOWER 101 #define CAM_MAX_HIGHPOWER 4 102 #endif 103 104 /* 105 * Structure for queueing a device in a run queue. 106 * There is one run queue for allocating new ccbs, 107 * and another for sending ccbs to the controller. 108 */ 109 struct cam_ed_qinfo { 110 cam_pinfo pinfo; 111 struct cam_ed *device; 112 }; 113 114 /* 115 * The CAM EDT (Existing Device Table) contains the device information for 116 * all devices for all busses in the system. The table contains a 117 * cam_ed structure for each device on the bus. 118 */ 119 struct cam_ed { 120 TAILQ_ENTRY(cam_ed) links; 121 struct cam_ed_qinfo alloc_ccb_entry; 122 struct cam_ed_qinfo send_ccb_entry; 123 struct cam_et *target; 124 struct cam_sim *sim; 125 lun_id_t lun_id; 126 struct camq drvq; /* 127 * Queue of type drivers wanting to do 128 * work on this device. 129 */ 130 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 131 struct async_list asyncs; /* Async callback info for this B/T/L */ 132 struct periph_list periphs; /* All attached devices */ 133 u_int generation; /* Generation number */ 134 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 135 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 136 /* Storage for the inquiry data */ 137 cam_proto protocol; 138 u_int protocol_version; 139 cam_xport transport; 140 u_int transport_version; 141 struct scsi_inquiry_data inq_data; 142 u_int8_t inq_flags; /* 143 * Current settings for inquiry flags. 144 * This allows us to override settings 145 * like disconnection and tagged 146 * queuing for a device. 147 */ 148 u_int8_t queue_flags; /* Queue flags from the control page */ 149 u_int8_t serial_num_len; 150 u_int8_t *serial_num; 151 u_int32_t qfrozen_cnt; 152 u_int32_t flags; 153 #define CAM_DEV_UNCONFIGURED 0x01 154 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 155 #define CAM_DEV_REL_ON_COMPLETE 0x04 156 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 157 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 158 #define CAM_DEV_TAG_AFTER_COUNT 0x20 159 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 160 #define CAM_DEV_IN_DV 0x80 161 #define CAM_DEV_DV_HIT_BOTTOM 0x100 162 u_int32_t tag_delay_count; 163 #define CAM_TAG_DELAY_COUNT 5 164 u_int32_t tag_saved_openings; 165 u_int32_t refcount; 166 struct callout callout; 167 }; 168 169 /* 170 * Each target is represented by an ET (Existing Target). These 171 * entries are created when a target is successfully probed with an 172 * identify, and removed when a device fails to respond after a number 173 * of retries, or a bus rescan finds the device missing. 174 */ 175 struct cam_et { 176 TAILQ_HEAD(, cam_ed) ed_entries; 177 TAILQ_ENTRY(cam_et) links; 178 struct cam_eb *bus; 179 target_id_t target_id; 180 u_int32_t refcount; 181 u_int generation; 182 struct timeval last_reset; /* uptime of last reset */ 183 }; 184 185 /* 186 * Each bus is represented by an EB (Existing Bus). These entries 187 * are created by calls to xpt_bus_register and deleted by calls to 188 * xpt_bus_deregister. 189 */ 190 struct cam_eb { 191 TAILQ_HEAD(, cam_et) et_entries; 192 TAILQ_ENTRY(cam_eb) links; 193 path_id_t path_id; 194 struct cam_sim *sim; 195 struct timeval last_reset; /* uptime of last reset */ 196 u_int32_t flags; 197 #define CAM_EB_RUNQ_SCHEDULED 0x01 198 u_int32_t refcount; 199 u_int generation; 200 }; 201 202 struct cam_path { 203 struct cam_periph *periph; 204 struct cam_eb *bus; 205 struct cam_et *target; 206 struct cam_ed *device; 207 }; 208 209 struct xpt_quirk_entry { 210 struct scsi_inquiry_pattern inq_pat; 211 u_int8_t quirks; 212 #define CAM_QUIRK_NOLUNS 0x01 213 #define CAM_QUIRK_NOSERIAL 0x02 214 #define CAM_QUIRK_HILUNS 0x04 215 #define CAM_QUIRK_NOHILUNS 0x08 216 u_int mintags; 217 u_int maxtags; 218 }; 219 220 static int cam_srch_hi = 0; 221 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi); 222 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS); 223 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0, 224 sysctl_cam_search_luns, "I", 225 "allow search above LUN 7 for SCSI3 and greater devices"); 226 227 #define CAM_SCSI2_MAXLUN 8 228 /* 229 * If we're not quirked to search <= the first 8 luns 230 * and we are either quirked to search above lun 8, 231 * or we're > SCSI-2 and we've enabled hilun searching, 232 * or we're > SCSI-2 and the last lun was a success, 233 * we can look for luns above lun 8. 234 */ 235 #define CAN_SRCH_HI_SPARSE(dv) \ 236 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 237 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 238 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi))) 239 240 #define CAN_SRCH_HI_DENSE(dv) \ 241 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 242 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 243 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))) 244 245 typedef enum { 246 XPT_FLAG_OPEN = 0x01 247 } xpt_flags; 248 249 struct xpt_softc { 250 xpt_flags flags; 251 u_int32_t xpt_generation; 252 253 /* number of high powered commands that can go through right now */ 254 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 255 int num_highpower; 256 257 /* queue for handling async rescan requests. */ 258 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 259 260 /* Registered busses */ 261 TAILQ_HEAD(,cam_eb) xpt_busses; 262 u_int bus_generation; 263 264 struct intr_config_hook *xpt_config_hook; 265 266 struct lock xpt_topo_lock; 267 struct lock xpt_lock; 268 }; 269 270 static const char quantum[] = "QUANTUM"; 271 static const char sony[] = "SONY"; 272 static const char west_digital[] = "WDIGTL"; 273 static const char samsung[] = "SAMSUNG"; 274 static const char seagate[] = "SEAGATE"; 275 static const char microp[] = "MICROP"; 276 277 static struct xpt_quirk_entry xpt_quirk_table[] = 278 { 279 { 280 /* Reports QUEUE FULL for temporary resource shortages */ 281 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 282 /*quirks*/0, /*mintags*/24, /*maxtags*/32 283 }, 284 { 285 /* Reports QUEUE FULL for temporary resource shortages */ 286 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 287 /*quirks*/0, /*mintags*/24, /*maxtags*/32 288 }, 289 { 290 /* Reports QUEUE FULL for temporary resource shortages */ 291 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 292 /*quirks*/0, /*mintags*/24, /*maxtags*/32 293 }, 294 { 295 /* Broken tagged queuing drive */ 296 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 297 /*quirks*/0, /*mintags*/0, /*maxtags*/0 298 }, 299 { 300 /* Broken tagged queuing drive */ 301 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 302 /*quirks*/0, /*mintags*/0, /*maxtags*/0 303 }, 304 { 305 /* Broken tagged queuing drive */ 306 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 307 /*quirks*/0, /*mintags*/0, /*maxtags*/0 308 }, 309 { 310 /* 311 * Unfortunately, the Quantum Atlas III has the same 312 * problem as the Atlas II drives above. 313 * Reported by: "Johan Granlund" <johan@granlund.nu> 314 * 315 * For future reference, the drive with the problem was: 316 * QUANTUM QM39100TD-SW N1B0 317 * 318 * It's possible that Quantum will fix the problem in later 319 * firmware revisions. If that happens, the quirk entry 320 * will need to be made specific to the firmware revisions 321 * with the problem. 322 * 323 */ 324 /* Reports QUEUE FULL for temporary resource shortages */ 325 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 326 /*quirks*/0, /*mintags*/24, /*maxtags*/32 327 }, 328 { 329 /* 330 * 18 Gig Atlas III, same problem as the 9G version. 331 * Reported by: Andre Albsmeier 332 * <andre.albsmeier@mchp.siemens.de> 333 * 334 * For future reference, the drive with the problem was: 335 * QUANTUM QM318000TD-S N491 336 */ 337 /* Reports QUEUE FULL for temporary resource shortages */ 338 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 339 /*quirks*/0, /*mintags*/24, /*maxtags*/32 340 }, 341 { 342 /* 343 * Broken tagged queuing drive 344 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 345 * and: Martin Renters <martin@tdc.on.ca> 346 */ 347 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 348 /*quirks*/0, /*mintags*/0, /*maxtags*/0 349 }, 350 /* 351 * The Seagate Medalist Pro drives have very poor write 352 * performance with anything more than 2 tags. 353 * 354 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 355 * Drive: <SEAGATE ST36530N 1444> 356 * 357 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 358 * Drive: <SEAGATE ST34520W 1281> 359 * 360 * No one has actually reported that the 9G version 361 * (ST39140*) of the Medalist Pro has the same problem, but 362 * we're assuming that it does because the 4G and 6.5G 363 * versions of the drive are broken. 364 */ 365 { 366 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 367 /*quirks*/0, /*mintags*/2, /*maxtags*/2 368 }, 369 { 370 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 371 /*quirks*/0, /*mintags*/2, /*maxtags*/2 372 }, 373 { 374 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 375 /*quirks*/0, /*mintags*/2, /*maxtags*/2 376 }, 377 { 378 /* 379 * Slow when tagged queueing is enabled. Write performance 380 * steadily drops off with more and more concurrent 381 * transactions. Best sequential write performance with 382 * tagged queueing turned off and write caching turned on. 383 * 384 * PR: kern/10398 385 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 386 * Drive: DCAS-34330 w/ "S65A" firmware. 387 * 388 * The drive with the problem had the "S65A" firmware 389 * revision, and has also been reported (by Stephen J. 390 * Roznowski <sjr@home.net>) for a drive with the "S61A" 391 * firmware revision. 392 * 393 * Although no one has reported problems with the 2 gig 394 * version of the DCAS drive, the assumption is that it 395 * has the same problems as the 4 gig version. Therefore 396 * this quirk entries disables tagged queueing for all 397 * DCAS drives. 398 */ 399 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 400 /*quirks*/0, /*mintags*/0, /*maxtags*/0 401 }, 402 { 403 /* Broken tagged queuing drive */ 404 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 405 /*quirks*/0, /*mintags*/0, /*maxtags*/0 406 }, 407 { 408 /* Broken tagged queuing drive */ 409 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 410 /*quirks*/0, /*mintags*/0, /*maxtags*/0 411 }, 412 { 413 /* This does not support other than LUN 0 */ 414 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" }, 415 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 416 }, 417 { 418 /* 419 * Broken tagged queuing drive. 420 * Submitted by: 421 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 422 * in PR kern/9535 423 */ 424 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 425 /*quirks*/0, /*mintags*/0, /*maxtags*/0 426 }, 427 { 428 /* 429 * Slow when tagged queueing is enabled. (1.5MB/sec versus 430 * 8MB/sec.) 431 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 432 * Best performance with these drives is achieved with 433 * tagged queueing turned off, and write caching turned on. 434 */ 435 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 436 /*quirks*/0, /*mintags*/0, /*maxtags*/0 437 }, 438 { 439 /* 440 * Slow when tagged queueing is enabled. (1.5MB/sec versus 441 * 8MB/sec.) 442 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 443 * Best performance with these drives is achieved with 444 * tagged queueing turned off, and write caching turned on. 445 */ 446 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 447 /*quirks*/0, /*mintags*/0, /*maxtags*/0 448 }, 449 { 450 /* 451 * Doesn't handle queue full condition correctly, 452 * so we need to limit maxtags to what the device 453 * can handle instead of determining this automatically. 454 */ 455 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 456 /*quirks*/0, /*mintags*/2, /*maxtags*/32 457 }, 458 { 459 /* Really only one LUN */ 460 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 461 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 462 }, 463 { 464 /* I can't believe we need a quirk for DPT volumes. */ 465 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 466 CAM_QUIRK_NOLUNS, 467 /*mintags*/0, /*maxtags*/255 468 }, 469 { 470 /* 471 * Many Sony CDROM drives don't like multi-LUN probing. 472 */ 473 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 474 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 475 }, 476 { 477 /* 478 * This drive doesn't like multiple LUN probing. 479 * Submitted by: Parag Patel <parag@cgt.com> 480 */ 481 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 482 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 483 }, 484 { 485 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 486 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 487 }, 488 { 489 /* 490 * The 8200 doesn't like multi-lun probing, and probably 491 * don't like serial number requests either. 492 */ 493 { 494 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 495 "EXB-8200*", "*" 496 }, 497 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 498 }, 499 { 500 /* 501 * Let's try the same as above, but for a drive that says 502 * it's an IPL-6860 but is actually an EXB 8200. 503 */ 504 { 505 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 506 "IPL-6860*", "*" 507 }, 508 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 509 }, 510 { 511 /* 512 * These Hitachi drives don't like multi-lun probing. 513 * The PR submitter has a DK319H, but says that the Linux 514 * kernel has a similar work-around for the DK312 and DK314, 515 * so all DK31* drives are quirked here. 516 * PR: misc/18793 517 * Submitted by: Paul Haddad <paul@pth.com> 518 */ 519 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 520 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 521 }, 522 { 523 /* 524 * The Hitachi CJ series with J8A8 firmware apparantly has 525 * problems with tagged commands. 526 * PR: 23536 527 * Reported by: amagai@nue.org 528 */ 529 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" }, 530 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 531 }, 532 { 533 /* 534 * These are the large storage arrays. 535 * Submitted by: William Carrel <william.carrel@infospace.com> 536 */ 537 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" }, 538 CAM_QUIRK_HILUNS, 2, 1024 539 }, 540 { 541 /* 542 * This old revision of the TDC3600 is also SCSI-1, and 543 * hangs upon serial number probing. 544 */ 545 { 546 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 547 " TDC 3600", "U07:" 548 }, 549 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 550 }, 551 { 552 /* 553 * Would repond to all LUNs if asked for. 554 */ 555 { 556 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 557 "CP150", "*" 558 }, 559 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 560 }, 561 { 562 /* 563 * Would repond to all LUNs if asked for. 564 */ 565 { 566 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 567 "96X2*", "*" 568 }, 569 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 570 }, 571 { 572 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 573 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 574 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 575 }, 576 { 577 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 578 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 579 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 580 }, 581 { 582 /* TeraSolutions special settings for TRC-22 RAID */ 583 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 584 /*quirks*/0, /*mintags*/55, /*maxtags*/255 585 }, 586 { 587 /* Veritas Storage Appliance */ 588 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 589 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 590 }, 591 { 592 /* 593 * Would respond to all LUNs. Device type and removable 594 * flag are jumper-selectable. 595 */ 596 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 597 "Tahiti 1", "*" 598 }, 599 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 600 }, 601 { 602 /* EasyRAID E5A aka. areca ARC-6010 */ 603 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" }, 604 CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255 605 }, 606 { 607 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" }, 608 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 609 }, 610 { 611 /* Default tagged queuing parameters for all devices */ 612 { 613 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 614 /*vendor*/"*", /*product*/"*", /*revision*/"*" 615 }, 616 /*quirks*/0, /*mintags*/2, /*maxtags*/255 617 }, 618 }; 619 620 static const int xpt_quirk_table_size = 621 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 622 623 typedef enum { 624 DM_RET_COPY = 0x01, 625 DM_RET_FLAG_MASK = 0x0f, 626 DM_RET_NONE = 0x00, 627 DM_RET_STOP = 0x10, 628 DM_RET_DESCEND = 0x20, 629 DM_RET_ERROR = 0x30, 630 DM_RET_ACTION_MASK = 0xf0 631 } dev_match_ret; 632 633 typedef enum { 634 XPT_DEPTH_BUS, 635 XPT_DEPTH_TARGET, 636 XPT_DEPTH_DEVICE, 637 XPT_DEPTH_PERIPH 638 } xpt_traverse_depth; 639 640 struct xpt_traverse_config { 641 xpt_traverse_depth depth; 642 void *tr_func; 643 void *tr_arg; 644 }; 645 646 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 647 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 648 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 649 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 650 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 651 652 /* Transport layer configuration information */ 653 static struct xpt_softc xsoftc; 654 655 /* Queues for our software interrupt handler */ 656 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 657 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 658 static cam_simq_t cam_simq; 659 static struct spinlock cam_simq_spin; 660 661 struct cam_periph *xpt_periph; 662 663 static periph_init_t xpt_periph_init; 664 665 static periph_init_t probe_periph_init; 666 667 static struct periph_driver xpt_driver = 668 { 669 xpt_periph_init, "xpt", 670 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 671 }; 672 673 static struct periph_driver probe_driver = 674 { 675 probe_periph_init, "probe", 676 TAILQ_HEAD_INITIALIZER(probe_driver.units) 677 }; 678 679 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 680 PERIPHDRIVER_DECLARE(probe, probe_driver); 681 682 #define XPT_CDEV_MAJOR 104 683 684 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", XPT_CDEV_MAJOR, 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 xptaction(struct cam_sim *sim, union ccb *work_ccb); 800 static void xptpoll(struct cam_sim *sim); 801 static inthand2_t swi_cambio; 802 static void camisr(void *); 803 static void camisr_runqueue(struct cam_sim *); 804 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 805 u_int num_patterns, struct cam_eb *bus); 806 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 807 u_int num_patterns, 808 struct cam_ed *device); 809 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 810 u_int num_patterns, 811 struct cam_periph *periph); 812 static xpt_busfunc_t xptedtbusfunc; 813 static xpt_targetfunc_t xptedttargetfunc; 814 static xpt_devicefunc_t xptedtdevicefunc; 815 static xpt_periphfunc_t xptedtperiphfunc; 816 static xpt_pdrvfunc_t xptplistpdrvfunc; 817 static xpt_periphfunc_t xptplistperiphfunc; 818 static int xptedtmatch(struct ccb_dev_match *cdm); 819 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 820 static int xptbustraverse(struct cam_eb *start_bus, 821 xpt_busfunc_t *tr_func, void *arg); 822 static int xpttargettraverse(struct cam_eb *bus, 823 struct cam_et *start_target, 824 xpt_targetfunc_t *tr_func, void *arg); 825 static int xptdevicetraverse(struct cam_et *target, 826 struct cam_ed *start_device, 827 xpt_devicefunc_t *tr_func, void *arg); 828 static int xptperiphtraverse(struct cam_ed *device, 829 struct cam_periph *start_periph, 830 xpt_periphfunc_t *tr_func, void *arg); 831 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 832 xpt_pdrvfunc_t *tr_func, void *arg); 833 static int xptpdperiphtraverse(struct periph_driver **pdrv, 834 struct cam_periph *start_periph, 835 xpt_periphfunc_t *tr_func, 836 void *arg); 837 static xpt_busfunc_t xptdefbusfunc; 838 static xpt_targetfunc_t xptdeftargetfunc; 839 static xpt_devicefunc_t xptdefdevicefunc; 840 static xpt_periphfunc_t xptdefperiphfunc; 841 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 842 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 843 void *arg); 844 static xpt_devicefunc_t xptsetasyncfunc; 845 static xpt_busfunc_t xptsetasyncbusfunc; 846 static cam_status xptregister(struct cam_periph *periph, 847 void *arg); 848 static cam_status proberegister(struct cam_periph *periph, 849 void *arg); 850 static void probeschedule(struct cam_periph *probe_periph); 851 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 852 static void proberequestdefaultnegotiation(struct cam_periph *periph); 853 static int proberequestbackoff(struct cam_periph *periph, 854 struct cam_ed *device); 855 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 856 static void probecleanup(struct cam_periph *periph); 857 static void xpt_find_quirk(struct cam_ed *device); 858 static void xpt_devise_transport(struct cam_path *path); 859 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 860 struct cam_ed *device, 861 int async_update); 862 static void xpt_toggle_tags(struct cam_path *path); 863 static void xpt_start_tags(struct cam_path *path); 864 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 865 struct cam_ed *dev); 866 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 867 struct cam_ed *dev); 868 static __inline int periph_is_queued(struct cam_periph *periph); 869 static __inline int device_is_alloc_queued(struct cam_ed *device); 870 static __inline int device_is_send_queued(struct cam_ed *device); 871 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 872 873 static __inline int 874 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 875 { 876 int retval; 877 878 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 879 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 880 cam_ccbq_resize(&dev->ccbq, 881 dev->ccbq.dev_openings 882 + dev->ccbq.dev_active); 883 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 884 } 885 /* 886 * The priority of a device waiting for CCB resources 887 * is that of the the highest priority peripheral driver 888 * enqueued. 889 */ 890 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 891 &dev->alloc_ccb_entry.pinfo, 892 CAMQ_GET_HEAD(&dev->drvq)->priority); 893 } else { 894 retval = 0; 895 } 896 897 return (retval); 898 } 899 900 static __inline int 901 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 902 { 903 int retval; 904 905 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 906 /* 907 * The priority of a device waiting for controller 908 * resources is that of the the highest priority CCB 909 * enqueued. 910 */ 911 retval = 912 xpt_schedule_dev(&bus->sim->devq->send_queue, 913 &dev->send_ccb_entry.pinfo, 914 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 915 } else { 916 retval = 0; 917 } 918 return (retval); 919 } 920 921 static __inline int 922 periph_is_queued(struct cam_periph *periph) 923 { 924 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 925 } 926 927 static __inline int 928 device_is_alloc_queued(struct cam_ed *device) 929 { 930 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 931 } 932 933 static __inline int 934 device_is_send_queued(struct cam_ed *device) 935 { 936 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 937 } 938 939 static __inline int 940 dev_allocq_is_runnable(struct cam_devq *devq) 941 { 942 /* 943 * Have work to do. 944 * Have space to do more work. 945 * Allowed to do work. 946 */ 947 return ((devq->alloc_queue.qfrozen_cnt == 0) 948 && (devq->alloc_queue.entries > 0) 949 && (devq->alloc_openings > 0)); 950 } 951 952 static void 953 xpt_periph_init(void) 954 { 955 dev_ops_add(&xpt_ops, 0, 0); 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 /* thread to handle bus rescans */ 1386 static void 1387 xpt_scanner_thread(void *dummy) 1388 { 1389 cam_isrq_t queue; 1390 union ccb *ccb; 1391 struct cam_sim *sim; 1392 1393 for (;;) { 1394 /* 1395 * Wait for a rescan request to come in. When it does, splice 1396 * it onto a queue from local storage so that the xpt lock 1397 * doesn't need to be held while the requests are being 1398 * processed. 1399 */ 1400 crit_enter(); 1401 tsleep_interlock(&xsoftc.ccb_scanq); 1402 xpt_unlock_buses(); 1403 tsleep(&xsoftc.ccb_scanq, 0, "ccb_scanq", 0); 1404 xpt_lock_buses(); 1405 crit_exit(); 1406 TAILQ_INIT(&queue); 1407 TAILQ_CONCAT(&queue, &xsoftc.ccb_scanq, sim_links.tqe); 1408 xpt_unlock_buses(); 1409 1410 while ((ccb = (union ccb *)TAILQ_FIRST(&queue)) != NULL) { 1411 TAILQ_REMOVE(&queue, &ccb->ccb_h, sim_links.tqe); 1412 1413 sim = ccb->ccb_h.path->bus->sim; 1414 CAM_SIM_LOCK(sim); 1415 1416 ccb->ccb_h.func_code = XPT_SCAN_BUS; 1417 ccb->ccb_h.cbfcnp = xptdone; 1418 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 5); 1419 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1420 xpt_free_path(ccb->ccb_h.path); 1421 xpt_free_ccb(ccb); 1422 CAM_SIM_UNLOCK(sim); 1423 } 1424 } 1425 } 1426 1427 void 1428 xpt_rescan(union ccb *ccb) 1429 { 1430 struct ccb_hdr *hdr; 1431 1432 /* 1433 * Don't make duplicate entries for the same paths. 1434 */ 1435 xpt_lock_buses(); 1436 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 1437 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 1438 xpt_unlock_buses(); 1439 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 1440 xpt_free_path(ccb->ccb_h.path); 1441 xpt_free_ccb(ccb); 1442 return; 1443 } 1444 } 1445 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 1446 wakeup(&xsoftc.ccb_scanq); 1447 xpt_unlock_buses(); 1448 } 1449 1450 1451 /* Functions accessed by the peripheral drivers */ 1452 static int 1453 xpt_init(void *dummy) 1454 { 1455 struct cam_sim *xpt_sim; 1456 struct cam_path *path; 1457 struct cam_devq *devq; 1458 cam_status status; 1459 1460 TAILQ_INIT(&xsoftc.xpt_busses); 1461 TAILQ_INIT(&cam_simq); 1462 TAILQ_INIT(&xsoftc.ccb_scanq); 1463 STAILQ_INIT(&xsoftc.highpowerq); 1464 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 1465 1466 spin_init(&cam_simq_spin); 1467 lockinit(&xsoftc.xpt_lock, "XPT lock", 0, LK_CANRECURSE); 1468 lockinit(&xsoftc.xpt_topo_lock, "XPT topology lock", 0, LK_CANRECURSE); 1469 1470 SLIST_INIT(&cam_dead_sim.ccb_freeq); 1471 TAILQ_INIT(&cam_dead_sim.sim_doneq); 1472 spin_init(&cam_dead_sim.sim_spin); 1473 cam_dead_sim.sim_action = dead_sim_action; 1474 cam_dead_sim.sim_poll = dead_sim_poll; 1475 cam_dead_sim.sim_name = "dead_sim"; 1476 cam_dead_sim.lock = &cam_dead_lock; 1477 lockinit(&cam_dead_lock, "XPT dead_sim lock", 0, LK_CANRECURSE); 1478 cam_dead_sim.flags |= CAM_SIM_DEREGISTERED; 1479 1480 /* 1481 * The xpt layer is, itself, the equivelent of a SIM. 1482 * Allow 16 ccbs in the ccb pool for it. This should 1483 * give decent parallelism when we probe busses and 1484 * perform other XPT functions. 1485 */ 1486 devq = cam_simq_alloc(16); 1487 xpt_sim = cam_sim_alloc(xptaction, 1488 xptpoll, 1489 "xpt", 1490 /*softc*/NULL, 1491 /*unit*/0, 1492 /*lock*/&xsoftc.xpt_lock, 1493 /*max_dev_transactions*/0, 1494 /*max_tagged_dev_transactions*/0, 1495 devq); 1496 cam_simq_release(devq); 1497 if (xpt_sim == NULL) 1498 return (ENOMEM); 1499 1500 xpt_sim->max_ccbs = 16; 1501 1502 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 1503 if ((status = xpt_bus_register(xpt_sim, /*bus #*/0)) != CAM_SUCCESS) { 1504 kprintf("xpt_init: xpt_bus_register failed with status %#x," 1505 " failing attach\n", status); 1506 return (EINVAL); 1507 } 1508 1509 /* 1510 * Looking at the XPT from the SIM layer, the XPT is 1511 * the equivelent of a peripheral driver. Allocate 1512 * a peripheral driver entry for us. 1513 */ 1514 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1515 CAM_TARGET_WILDCARD, 1516 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1517 kprintf("xpt_init: xpt_create_path failed with status %#x," 1518 " failing attach\n", status); 1519 return (EINVAL); 1520 } 1521 1522 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1523 path, NULL, 0, xpt_sim); 1524 xpt_free_path(path); 1525 1526 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1527 1528 /* 1529 * Register a callback for when interrupts are enabled. 1530 */ 1531 xsoftc.xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1532 M_CAMXPT, M_INTWAIT | M_ZERO); 1533 xsoftc.xpt_config_hook->ich_func = xpt_config; 1534 xsoftc.xpt_config_hook->ich_desc = "xpt"; 1535 xsoftc.xpt_config_hook->ich_order = 1000; 1536 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 1537 kfree (xsoftc.xpt_config_hook, M_CAMXPT); 1538 kprintf("xpt_init: config_intrhook_establish failed " 1539 "- failing attach\n"); 1540 } 1541 1542 /* fire up rescan thread */ 1543 if (kthread_create(xpt_scanner_thread, NULL, NULL, "xpt_thrd")) { 1544 kprintf("xpt_init: failed to create rescan thread\n"); 1545 } 1546 /* Install our software interrupt handlers */ 1547 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL); 1548 1549 return (0); 1550 } 1551 1552 static cam_status 1553 xptregister(struct cam_periph *periph, void *arg) 1554 { 1555 struct cam_sim *xpt_sim; 1556 1557 if (periph == NULL) { 1558 kprintf("xptregister: periph was NULL!!\n"); 1559 return(CAM_REQ_CMP_ERR); 1560 } 1561 1562 xpt_sim = (struct cam_sim *)arg; 1563 xpt_sim->softc = periph; 1564 xpt_periph = periph; 1565 periph->softc = NULL; 1566 1567 return(CAM_REQ_CMP); 1568 } 1569 1570 int32_t 1571 xpt_add_periph(struct cam_periph *periph) 1572 { 1573 struct cam_ed *device; 1574 int32_t status; 1575 struct periph_list *periph_head; 1576 1577 sim_lock_assert_owned(periph->sim->lock); 1578 1579 device = periph->path->device; 1580 1581 periph_head = &device->periphs; 1582 1583 status = CAM_REQ_CMP; 1584 1585 if (device != NULL) { 1586 /* 1587 * Make room for this peripheral 1588 * so it will fit in the queue 1589 * when it's scheduled to run 1590 */ 1591 status = camq_resize(&device->drvq, 1592 device->drvq.array_size + 1); 1593 1594 device->generation++; 1595 1596 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1597 } 1598 1599 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1600 xsoftc.xpt_generation++; 1601 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1602 1603 return (status); 1604 } 1605 1606 void 1607 xpt_remove_periph(struct cam_periph *periph) 1608 { 1609 struct cam_ed *device; 1610 1611 sim_lock_assert_owned(periph->sim->lock); 1612 1613 device = periph->path->device; 1614 1615 if (device != NULL) { 1616 struct periph_list *periph_head; 1617 1618 periph_head = &device->periphs; 1619 1620 /* Release the slot for this peripheral */ 1621 camq_resize(&device->drvq, device->drvq.array_size - 1); 1622 1623 device->generation++; 1624 1625 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1626 } 1627 1628 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1629 xsoftc.xpt_generation++; 1630 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1631 } 1632 1633 void 1634 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1635 { 1636 struct ccb_pathinq cpi; 1637 struct ccb_trans_settings cts; 1638 struct cam_path *path; 1639 u_int speed; 1640 u_int freq; 1641 u_int mb; 1642 1643 sim_lock_assert_owned(periph->sim->lock); 1644 1645 path = periph->path; 1646 /* 1647 * To ensure that this is printed in one piece, 1648 * mask out CAM interrupts. 1649 */ 1650 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1651 periph->periph_name, periph->unit_number, 1652 path->bus->sim->sim_name, 1653 path->bus->sim->unit_number, 1654 path->bus->sim->bus_id, 1655 path->target->target_id, 1656 path->device->lun_id); 1657 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1658 scsi_print_inquiry(&path->device->inq_data); 1659 if (bootverbose && path->device->serial_num_len > 0) { 1660 /* Don't wrap the screen - print only the first 60 chars */ 1661 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1662 periph->unit_number, path->device->serial_num); 1663 } 1664 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1665 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1666 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1667 xpt_action((union ccb*)&cts); 1668 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1669 return; 1670 } 1671 1672 /* Ask the SIM for its base transfer speed */ 1673 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1674 cpi.ccb_h.func_code = XPT_PATH_INQ; 1675 xpt_action((union ccb *)&cpi); 1676 1677 speed = cpi.base_transfer_speed; 1678 freq = 0; 1679 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1680 struct ccb_trans_settings_spi *spi; 1681 1682 spi = &cts.xport_specific.spi; 1683 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1684 && spi->sync_offset != 0) { 1685 freq = scsi_calc_syncsrate(spi->sync_period); 1686 speed = freq; 1687 } 1688 1689 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1690 speed *= (0x01 << spi->bus_width); 1691 } 1692 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1693 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; 1694 if (fc->valid & CTS_FC_VALID_SPEED) { 1695 speed = fc->bitrate; 1696 } 1697 } 1698 1699 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { 1700 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; 1701 if (sas->valid & CTS_SAS_VALID_SPEED) { 1702 speed = sas->bitrate; 1703 } 1704 } 1705 1706 mb = speed / 1000; 1707 if (mb > 0) 1708 kprintf("%s%d: %d.%03dMB/s transfers", 1709 periph->periph_name, periph->unit_number, 1710 mb, speed % 1000); 1711 else 1712 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1713 periph->unit_number, speed); 1714 /* Report additional information about SPI connections */ 1715 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1716 struct ccb_trans_settings_spi *spi; 1717 1718 spi = &cts.xport_specific.spi; 1719 if (freq != 0) { 1720 kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1721 freq % 1000, 1722 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1723 ? " DT" : "", 1724 spi->sync_offset); 1725 } 1726 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1727 && spi->bus_width > 0) { 1728 if (freq != 0) { 1729 kprintf(", "); 1730 } else { 1731 kprintf(" ("); 1732 } 1733 kprintf("%dbit)", 8 * (0x01 << spi->bus_width)); 1734 } else if (freq != 0) { 1735 kprintf(")"); 1736 } 1737 } 1738 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1739 struct ccb_trans_settings_fc *fc; 1740 1741 fc = &cts.xport_specific.fc; 1742 if (fc->valid & CTS_FC_VALID_WWNN) 1743 kprintf(" WWNN 0x%llx", (long long) fc->wwnn); 1744 if (fc->valid & CTS_FC_VALID_WWPN) 1745 kprintf(" WWPN 0x%llx", (long long) fc->wwpn); 1746 if (fc->valid & CTS_FC_VALID_PORT) 1747 kprintf(" PortID 0x%x", fc->port); 1748 } 1749 1750 if (path->device->inq_flags & SID_CmdQue 1751 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1752 kprintf("\n%s%d: Command Queueing Enabled", 1753 periph->periph_name, periph->unit_number); 1754 } 1755 kprintf("\n"); 1756 1757 /* 1758 * We only want to print the caller's announce string if they've 1759 * passed one in.. 1760 */ 1761 if (announce_string != NULL) 1762 kprintf("%s%d: %s\n", periph->periph_name, 1763 periph->unit_number, announce_string); 1764 } 1765 1766 static dev_match_ret 1767 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1768 struct cam_eb *bus) 1769 { 1770 dev_match_ret retval; 1771 int i; 1772 1773 retval = DM_RET_NONE; 1774 1775 /* 1776 * If we aren't given something to match against, that's an error. 1777 */ 1778 if (bus == NULL) 1779 return(DM_RET_ERROR); 1780 1781 /* 1782 * If there are no match entries, then this bus matches no 1783 * matter what. 1784 */ 1785 if ((patterns == NULL) || (num_patterns == 0)) 1786 return(DM_RET_DESCEND | DM_RET_COPY); 1787 1788 for (i = 0; i < num_patterns; i++) { 1789 struct bus_match_pattern *cur_pattern; 1790 1791 /* 1792 * If the pattern in question isn't for a bus node, we 1793 * aren't interested. However, we do indicate to the 1794 * calling routine that we should continue descending the 1795 * tree, since the user wants to match against lower-level 1796 * EDT elements. 1797 */ 1798 if (patterns[i].type != DEV_MATCH_BUS) { 1799 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1800 retval |= DM_RET_DESCEND; 1801 continue; 1802 } 1803 1804 cur_pattern = &patterns[i].pattern.bus_pattern; 1805 1806 /* 1807 * If they want to match any bus node, we give them any 1808 * device node. 1809 */ 1810 if (cur_pattern->flags == BUS_MATCH_ANY) { 1811 /* set the copy flag */ 1812 retval |= DM_RET_COPY; 1813 1814 /* 1815 * If we've already decided on an action, go ahead 1816 * and return. 1817 */ 1818 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1819 return(retval); 1820 } 1821 1822 /* 1823 * Not sure why someone would do this... 1824 */ 1825 if (cur_pattern->flags == BUS_MATCH_NONE) 1826 continue; 1827 1828 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1829 && (cur_pattern->path_id != bus->path_id)) 1830 continue; 1831 1832 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1833 && (cur_pattern->bus_id != bus->sim->bus_id)) 1834 continue; 1835 1836 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1837 && (cur_pattern->unit_number != bus->sim->unit_number)) 1838 continue; 1839 1840 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1841 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1842 DEV_IDLEN) != 0)) 1843 continue; 1844 1845 /* 1846 * If we get to this point, the user definitely wants 1847 * information on this bus. So tell the caller to copy the 1848 * data out. 1849 */ 1850 retval |= DM_RET_COPY; 1851 1852 /* 1853 * If the return action has been set to descend, then we 1854 * know that we've already seen a non-bus matching 1855 * expression, therefore we need to further descend the tree. 1856 * This won't change by continuing around the loop, so we 1857 * go ahead and return. If we haven't seen a non-bus 1858 * matching expression, we keep going around the loop until 1859 * we exhaust the matching expressions. We'll set the stop 1860 * flag once we fall out of the loop. 1861 */ 1862 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1863 return(retval); 1864 } 1865 1866 /* 1867 * If the return action hasn't been set to descend yet, that means 1868 * we haven't seen anything other than bus matching patterns. So 1869 * tell the caller to stop descending the tree -- the user doesn't 1870 * want to match against lower level tree elements. 1871 */ 1872 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1873 retval |= DM_RET_STOP; 1874 1875 return(retval); 1876 } 1877 1878 static dev_match_ret 1879 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1880 struct cam_ed *device) 1881 { 1882 dev_match_ret retval; 1883 int i; 1884 1885 retval = DM_RET_NONE; 1886 1887 /* 1888 * If we aren't given something to match against, that's an error. 1889 */ 1890 if (device == NULL) 1891 return(DM_RET_ERROR); 1892 1893 /* 1894 * If there are no match entries, then this device matches no 1895 * matter what. 1896 */ 1897 if ((patterns == NULL) || (num_patterns == 0)) 1898 return(DM_RET_DESCEND | DM_RET_COPY); 1899 1900 for (i = 0; i < num_patterns; i++) { 1901 struct device_match_pattern *cur_pattern; 1902 1903 /* 1904 * If the pattern in question isn't for a device node, we 1905 * aren't interested. 1906 */ 1907 if (patterns[i].type != DEV_MATCH_DEVICE) { 1908 if ((patterns[i].type == DEV_MATCH_PERIPH) 1909 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1910 retval |= DM_RET_DESCEND; 1911 continue; 1912 } 1913 1914 cur_pattern = &patterns[i].pattern.device_pattern; 1915 1916 /* 1917 * If they want to match any device node, we give them any 1918 * device node. 1919 */ 1920 if (cur_pattern->flags == DEV_MATCH_ANY) { 1921 /* set the copy flag */ 1922 retval |= DM_RET_COPY; 1923 1924 1925 /* 1926 * If we've already decided on an action, go ahead 1927 * and return. 1928 */ 1929 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1930 return(retval); 1931 } 1932 1933 /* 1934 * Not sure why someone would do this... 1935 */ 1936 if (cur_pattern->flags == DEV_MATCH_NONE) 1937 continue; 1938 1939 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1940 && (cur_pattern->path_id != device->target->bus->path_id)) 1941 continue; 1942 1943 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1944 && (cur_pattern->target_id != device->target->target_id)) 1945 continue; 1946 1947 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1948 && (cur_pattern->target_lun != device->lun_id)) 1949 continue; 1950 1951 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1952 && (cam_quirkmatch((caddr_t)&device->inq_data, 1953 (caddr_t)&cur_pattern->inq_pat, 1954 1, sizeof(cur_pattern->inq_pat), 1955 scsi_static_inquiry_match) == NULL)) 1956 continue; 1957 1958 /* 1959 * If we get to this point, the user definitely wants 1960 * information on this device. So tell the caller to copy 1961 * the data out. 1962 */ 1963 retval |= DM_RET_COPY; 1964 1965 /* 1966 * If the return action has been set to descend, then we 1967 * know that we've already seen a peripheral matching 1968 * expression, therefore we need to further descend the tree. 1969 * This won't change by continuing around the loop, so we 1970 * go ahead and return. If we haven't seen a peripheral 1971 * matching expression, we keep going around the loop until 1972 * we exhaust the matching expressions. We'll set the stop 1973 * flag once we fall out of the loop. 1974 */ 1975 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1976 return(retval); 1977 } 1978 1979 /* 1980 * If the return action hasn't been set to descend yet, that means 1981 * we haven't seen any peripheral matching patterns. So tell the 1982 * caller to stop descending the tree -- the user doesn't want to 1983 * match against lower level tree elements. 1984 */ 1985 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1986 retval |= DM_RET_STOP; 1987 1988 return(retval); 1989 } 1990 1991 /* 1992 * Match a single peripheral against any number of match patterns. 1993 */ 1994 static dev_match_ret 1995 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1996 struct cam_periph *periph) 1997 { 1998 dev_match_ret retval; 1999 int i; 2000 2001 /* 2002 * If we aren't given something to match against, that's an error. 2003 */ 2004 if (periph == NULL) 2005 return(DM_RET_ERROR); 2006 2007 /* 2008 * If there are no match entries, then this peripheral matches no 2009 * matter what. 2010 */ 2011 if ((patterns == NULL) || (num_patterns == 0)) 2012 return(DM_RET_STOP | DM_RET_COPY); 2013 2014 /* 2015 * There aren't any nodes below a peripheral node, so there's no 2016 * reason to descend the tree any further. 2017 */ 2018 retval = DM_RET_STOP; 2019 2020 for (i = 0; i < num_patterns; i++) { 2021 struct periph_match_pattern *cur_pattern; 2022 2023 /* 2024 * If the pattern in question isn't for a peripheral, we 2025 * aren't interested. 2026 */ 2027 if (patterns[i].type != DEV_MATCH_PERIPH) 2028 continue; 2029 2030 cur_pattern = &patterns[i].pattern.periph_pattern; 2031 2032 /* 2033 * If they want to match on anything, then we will do so. 2034 */ 2035 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 2036 /* set the copy flag */ 2037 retval |= DM_RET_COPY; 2038 2039 /* 2040 * We've already set the return action to stop, 2041 * since there are no nodes below peripherals in 2042 * the tree. 2043 */ 2044 return(retval); 2045 } 2046 2047 /* 2048 * Not sure why someone would do this... 2049 */ 2050 if (cur_pattern->flags == PERIPH_MATCH_NONE) 2051 continue; 2052 2053 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 2054 && (cur_pattern->path_id != periph->path->bus->path_id)) 2055 continue; 2056 2057 /* 2058 * For the target and lun id's, we have to make sure the 2059 * target and lun pointers aren't NULL. The xpt peripheral 2060 * has a wildcard target and device. 2061 */ 2062 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 2063 && ((periph->path->target == NULL) 2064 ||(cur_pattern->target_id != periph->path->target->target_id))) 2065 continue; 2066 2067 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 2068 && ((periph->path->device == NULL) 2069 || (cur_pattern->target_lun != periph->path->device->lun_id))) 2070 continue; 2071 2072 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 2073 && (cur_pattern->unit_number != periph->unit_number)) 2074 continue; 2075 2076 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 2077 && (strncmp(cur_pattern->periph_name, periph->periph_name, 2078 DEV_IDLEN) != 0)) 2079 continue; 2080 2081 /* 2082 * If we get to this point, the user definitely wants 2083 * information on this peripheral. So tell the caller to 2084 * copy the data out. 2085 */ 2086 retval |= DM_RET_COPY; 2087 2088 /* 2089 * The return action has already been set to stop, since 2090 * peripherals don't have any nodes below them in the EDT. 2091 */ 2092 return(retval); 2093 } 2094 2095 /* 2096 * If we get to this point, the peripheral that was passed in 2097 * doesn't match any of the patterns. 2098 */ 2099 return(retval); 2100 } 2101 2102 static int 2103 xptedtbusfunc(struct cam_eb *bus, void *arg) 2104 { 2105 struct ccb_dev_match *cdm; 2106 dev_match_ret retval; 2107 2108 cdm = (struct ccb_dev_match *)arg; 2109 2110 /* 2111 * If our position is for something deeper in the tree, that means 2112 * that we've already seen this node. So, we keep going down. 2113 */ 2114 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2115 && (cdm->pos.cookie.bus == bus) 2116 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2117 && (cdm->pos.cookie.target != NULL)) 2118 retval = DM_RET_DESCEND; 2119 else 2120 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 2121 2122 /* 2123 * If we got an error, bail out of the search. 2124 */ 2125 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2126 cdm->status = CAM_DEV_MATCH_ERROR; 2127 return(0); 2128 } 2129 2130 /* 2131 * If the copy flag is set, copy this bus out. 2132 */ 2133 if (retval & DM_RET_COPY) { 2134 int spaceleft, j; 2135 2136 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2137 sizeof(struct dev_match_result)); 2138 2139 /* 2140 * If we don't have enough space to put in another 2141 * match result, save our position and tell the 2142 * user there are more devices to check. 2143 */ 2144 if (spaceleft < sizeof(struct dev_match_result)) { 2145 bzero(&cdm->pos, sizeof(cdm->pos)); 2146 cdm->pos.position_type = 2147 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 2148 2149 cdm->pos.cookie.bus = bus; 2150 cdm->pos.generations[CAM_BUS_GENERATION]= 2151 xsoftc.bus_generation; 2152 cdm->status = CAM_DEV_MATCH_MORE; 2153 return(0); 2154 } 2155 j = cdm->num_matches; 2156 cdm->num_matches++; 2157 cdm->matches[j].type = DEV_MATCH_BUS; 2158 cdm->matches[j].result.bus_result.path_id = bus->path_id; 2159 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 2160 cdm->matches[j].result.bus_result.unit_number = 2161 bus->sim->unit_number; 2162 strncpy(cdm->matches[j].result.bus_result.dev_name, 2163 bus->sim->sim_name, DEV_IDLEN); 2164 } 2165 2166 /* 2167 * If the user is only interested in busses, there's no 2168 * reason to descend to the next level in the tree. 2169 */ 2170 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2171 return(1); 2172 2173 /* 2174 * If there is a target generation recorded, check it to 2175 * make sure the target list hasn't changed. 2176 */ 2177 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2178 && (bus == cdm->pos.cookie.bus) 2179 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2180 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 2181 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 2182 bus->generation)) { 2183 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2184 return(0); 2185 } 2186 2187 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2188 && (cdm->pos.cookie.bus == bus) 2189 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2190 && (cdm->pos.cookie.target != NULL)) 2191 return(xpttargettraverse(bus, 2192 (struct cam_et *)cdm->pos.cookie.target, 2193 xptedttargetfunc, arg)); 2194 else 2195 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 2196 } 2197 2198 static int 2199 xptedttargetfunc(struct cam_et *target, void *arg) 2200 { 2201 struct ccb_dev_match *cdm; 2202 2203 cdm = (struct ccb_dev_match *)arg; 2204 2205 /* 2206 * If there is a device list generation recorded, check it to 2207 * make sure the device list hasn't changed. 2208 */ 2209 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2210 && (cdm->pos.cookie.bus == target->bus) 2211 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2212 && (cdm->pos.cookie.target == target) 2213 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2214 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2215 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2216 target->generation)) { 2217 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2218 return(0); 2219 } 2220 2221 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2222 && (cdm->pos.cookie.bus == target->bus) 2223 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2224 && (cdm->pos.cookie.target == target) 2225 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2226 && (cdm->pos.cookie.device != NULL)) 2227 return(xptdevicetraverse(target, 2228 (struct cam_ed *)cdm->pos.cookie.device, 2229 xptedtdevicefunc, arg)); 2230 else 2231 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2232 } 2233 2234 static int 2235 xptedtdevicefunc(struct cam_ed *device, void *arg) 2236 { 2237 2238 struct ccb_dev_match *cdm; 2239 dev_match_ret retval; 2240 2241 cdm = (struct ccb_dev_match *)arg; 2242 2243 /* 2244 * If our position is for something deeper in the tree, that means 2245 * that we've already seen this node. So, we keep going down. 2246 */ 2247 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2248 && (cdm->pos.cookie.device == device) 2249 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2250 && (cdm->pos.cookie.periph != NULL)) 2251 retval = DM_RET_DESCEND; 2252 else 2253 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2254 device); 2255 2256 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2257 cdm->status = CAM_DEV_MATCH_ERROR; 2258 return(0); 2259 } 2260 2261 /* 2262 * If the copy flag is set, copy this device out. 2263 */ 2264 if (retval & DM_RET_COPY) { 2265 int spaceleft, j; 2266 2267 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2268 sizeof(struct dev_match_result)); 2269 2270 /* 2271 * If we don't have enough space to put in another 2272 * match result, save our position and tell the 2273 * user there are more devices to check. 2274 */ 2275 if (spaceleft < sizeof(struct dev_match_result)) { 2276 bzero(&cdm->pos, sizeof(cdm->pos)); 2277 cdm->pos.position_type = 2278 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2279 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2280 2281 cdm->pos.cookie.bus = device->target->bus; 2282 cdm->pos.generations[CAM_BUS_GENERATION]= 2283 xsoftc.bus_generation; 2284 cdm->pos.cookie.target = device->target; 2285 cdm->pos.generations[CAM_TARGET_GENERATION] = 2286 device->target->bus->generation; 2287 cdm->pos.cookie.device = device; 2288 cdm->pos.generations[CAM_DEV_GENERATION] = 2289 device->target->generation; 2290 cdm->status = CAM_DEV_MATCH_MORE; 2291 return(0); 2292 } 2293 j = cdm->num_matches; 2294 cdm->num_matches++; 2295 cdm->matches[j].type = DEV_MATCH_DEVICE; 2296 cdm->matches[j].result.device_result.path_id = 2297 device->target->bus->path_id; 2298 cdm->matches[j].result.device_result.target_id = 2299 device->target->target_id; 2300 cdm->matches[j].result.device_result.target_lun = 2301 device->lun_id; 2302 bcopy(&device->inq_data, 2303 &cdm->matches[j].result.device_result.inq_data, 2304 sizeof(struct scsi_inquiry_data)); 2305 2306 /* Let the user know whether this device is unconfigured */ 2307 if (device->flags & CAM_DEV_UNCONFIGURED) 2308 cdm->matches[j].result.device_result.flags = 2309 DEV_RESULT_UNCONFIGURED; 2310 else 2311 cdm->matches[j].result.device_result.flags = 2312 DEV_RESULT_NOFLAG; 2313 } 2314 2315 /* 2316 * If the user isn't interested in peripherals, don't descend 2317 * the tree any further. 2318 */ 2319 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2320 return(1); 2321 2322 /* 2323 * If there is a peripheral list generation recorded, make sure 2324 * it hasn't changed. 2325 */ 2326 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2327 && (device->target->bus == cdm->pos.cookie.bus) 2328 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2329 && (device->target == cdm->pos.cookie.target) 2330 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2331 && (device == cdm->pos.cookie.device) 2332 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2333 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2334 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2335 device->generation)){ 2336 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2337 return(0); 2338 } 2339 2340 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2341 && (cdm->pos.cookie.bus == device->target->bus) 2342 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2343 && (cdm->pos.cookie.target == device->target) 2344 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2345 && (cdm->pos.cookie.device == device) 2346 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2347 && (cdm->pos.cookie.periph != NULL)) 2348 return(xptperiphtraverse(device, 2349 (struct cam_periph *)cdm->pos.cookie.periph, 2350 xptedtperiphfunc, arg)); 2351 else 2352 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2353 } 2354 2355 static int 2356 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2357 { 2358 struct ccb_dev_match *cdm; 2359 dev_match_ret retval; 2360 2361 cdm = (struct ccb_dev_match *)arg; 2362 2363 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2364 2365 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2366 cdm->status = CAM_DEV_MATCH_ERROR; 2367 return(0); 2368 } 2369 2370 /* 2371 * If the copy flag is set, copy this peripheral out. 2372 */ 2373 if (retval & DM_RET_COPY) { 2374 int spaceleft, j; 2375 2376 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2377 sizeof(struct dev_match_result)); 2378 2379 /* 2380 * If we don't have enough space to put in another 2381 * match result, save our position and tell the 2382 * user there are more devices to check. 2383 */ 2384 if (spaceleft < sizeof(struct dev_match_result)) { 2385 bzero(&cdm->pos, sizeof(cdm->pos)); 2386 cdm->pos.position_type = 2387 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2388 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2389 CAM_DEV_POS_PERIPH; 2390 2391 cdm->pos.cookie.bus = periph->path->bus; 2392 cdm->pos.generations[CAM_BUS_GENERATION]= 2393 xsoftc.bus_generation; 2394 cdm->pos.cookie.target = periph->path->target; 2395 cdm->pos.generations[CAM_TARGET_GENERATION] = 2396 periph->path->bus->generation; 2397 cdm->pos.cookie.device = periph->path->device; 2398 cdm->pos.generations[CAM_DEV_GENERATION] = 2399 periph->path->target->generation; 2400 cdm->pos.cookie.periph = periph; 2401 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2402 periph->path->device->generation; 2403 cdm->status = CAM_DEV_MATCH_MORE; 2404 return(0); 2405 } 2406 2407 j = cdm->num_matches; 2408 cdm->num_matches++; 2409 cdm->matches[j].type = DEV_MATCH_PERIPH; 2410 cdm->matches[j].result.periph_result.path_id = 2411 periph->path->bus->path_id; 2412 cdm->matches[j].result.periph_result.target_id = 2413 periph->path->target->target_id; 2414 cdm->matches[j].result.periph_result.target_lun = 2415 periph->path->device->lun_id; 2416 cdm->matches[j].result.periph_result.unit_number = 2417 periph->unit_number; 2418 strncpy(cdm->matches[j].result.periph_result.periph_name, 2419 periph->periph_name, DEV_IDLEN); 2420 } 2421 2422 return(1); 2423 } 2424 2425 static int 2426 xptedtmatch(struct ccb_dev_match *cdm) 2427 { 2428 int ret; 2429 2430 cdm->num_matches = 0; 2431 2432 /* 2433 * Check the bus list generation. If it has changed, the user 2434 * needs to reset everything and start over. 2435 */ 2436 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2437 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2438 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 2439 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2440 return(0); 2441 } 2442 2443 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2444 && (cdm->pos.cookie.bus != NULL)) 2445 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2446 xptedtbusfunc, cdm); 2447 else 2448 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2449 2450 /* 2451 * If we get back 0, that means that we had to stop before fully 2452 * traversing the EDT. It also means that one of the subroutines 2453 * has set the status field to the proper value. If we get back 1, 2454 * we've fully traversed the EDT and copied out any matching entries. 2455 */ 2456 if (ret == 1) 2457 cdm->status = CAM_DEV_MATCH_LAST; 2458 2459 return(ret); 2460 } 2461 2462 static int 2463 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2464 { 2465 struct ccb_dev_match *cdm; 2466 2467 cdm = (struct ccb_dev_match *)arg; 2468 2469 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2470 && (cdm->pos.cookie.pdrv == pdrv) 2471 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2472 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2473 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2474 (*pdrv)->generation)) { 2475 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2476 return(0); 2477 } 2478 2479 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2480 && (cdm->pos.cookie.pdrv == pdrv) 2481 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2482 && (cdm->pos.cookie.periph != NULL)) 2483 return(xptpdperiphtraverse(pdrv, 2484 (struct cam_periph *)cdm->pos.cookie.periph, 2485 xptplistperiphfunc, arg)); 2486 else 2487 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2488 } 2489 2490 static int 2491 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2492 { 2493 struct ccb_dev_match *cdm; 2494 dev_match_ret retval; 2495 2496 cdm = (struct ccb_dev_match *)arg; 2497 2498 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2499 2500 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2501 cdm->status = CAM_DEV_MATCH_ERROR; 2502 return(0); 2503 } 2504 2505 /* 2506 * If the copy flag is set, copy this peripheral out. 2507 */ 2508 if (retval & DM_RET_COPY) { 2509 int spaceleft, j; 2510 2511 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2512 sizeof(struct dev_match_result)); 2513 2514 /* 2515 * If we don't have enough space to put in another 2516 * match result, save our position and tell the 2517 * user there are more devices to check. 2518 */ 2519 if (spaceleft < sizeof(struct dev_match_result)) { 2520 struct periph_driver **pdrv; 2521 2522 pdrv = NULL; 2523 bzero(&cdm->pos, sizeof(cdm->pos)); 2524 cdm->pos.position_type = 2525 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2526 CAM_DEV_POS_PERIPH; 2527 2528 /* 2529 * This may look a bit non-sensical, but it is 2530 * actually quite logical. There are very few 2531 * peripheral drivers, and bloating every peripheral 2532 * structure with a pointer back to its parent 2533 * peripheral driver linker set entry would cost 2534 * more in the long run than doing this quick lookup. 2535 */ 2536 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2537 if (strcmp((*pdrv)->driver_name, 2538 periph->periph_name) == 0) 2539 break; 2540 } 2541 2542 if (*pdrv == NULL) { 2543 cdm->status = CAM_DEV_MATCH_ERROR; 2544 return(0); 2545 } 2546 2547 cdm->pos.cookie.pdrv = pdrv; 2548 /* 2549 * The periph generation slot does double duty, as 2550 * does the periph pointer slot. They are used for 2551 * both edt and pdrv lookups and positioning. 2552 */ 2553 cdm->pos.cookie.periph = periph; 2554 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2555 (*pdrv)->generation; 2556 cdm->status = CAM_DEV_MATCH_MORE; 2557 return(0); 2558 } 2559 2560 j = cdm->num_matches; 2561 cdm->num_matches++; 2562 cdm->matches[j].type = DEV_MATCH_PERIPH; 2563 cdm->matches[j].result.periph_result.path_id = 2564 periph->path->bus->path_id; 2565 2566 /* 2567 * The transport layer peripheral doesn't have a target or 2568 * lun. 2569 */ 2570 if (periph->path->target) 2571 cdm->matches[j].result.periph_result.target_id = 2572 periph->path->target->target_id; 2573 else 2574 cdm->matches[j].result.periph_result.target_id = -1; 2575 2576 if (periph->path->device) 2577 cdm->matches[j].result.periph_result.target_lun = 2578 periph->path->device->lun_id; 2579 else 2580 cdm->matches[j].result.periph_result.target_lun = -1; 2581 2582 cdm->matches[j].result.periph_result.unit_number = 2583 periph->unit_number; 2584 strncpy(cdm->matches[j].result.periph_result.periph_name, 2585 periph->periph_name, DEV_IDLEN); 2586 } 2587 2588 return(1); 2589 } 2590 2591 static int 2592 xptperiphlistmatch(struct ccb_dev_match *cdm) 2593 { 2594 int ret; 2595 2596 cdm->num_matches = 0; 2597 2598 /* 2599 * At this point in the edt traversal function, we check the bus 2600 * list generation to make sure that no busses have been added or 2601 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2602 * For the peripheral driver list traversal function, however, we 2603 * don't have to worry about new peripheral driver types coming or 2604 * going; they're in a linker set, and therefore can't change 2605 * without a recompile. 2606 */ 2607 2608 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2609 && (cdm->pos.cookie.pdrv != NULL)) 2610 ret = xptpdrvtraverse( 2611 (struct periph_driver **)cdm->pos.cookie.pdrv, 2612 xptplistpdrvfunc, cdm); 2613 else 2614 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2615 2616 /* 2617 * If we get back 0, that means that we had to stop before fully 2618 * traversing the peripheral driver tree. It also means that one of 2619 * the subroutines has set the status field to the proper value. If 2620 * we get back 1, we've fully traversed the EDT and copied out any 2621 * matching entries. 2622 */ 2623 if (ret == 1) 2624 cdm->status = CAM_DEV_MATCH_LAST; 2625 2626 return(ret); 2627 } 2628 2629 static int 2630 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2631 { 2632 struct cam_eb *bus, *next_bus; 2633 int retval; 2634 2635 retval = 1; 2636 2637 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2638 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 2639 bus != NULL; 2640 bus = next_bus) { 2641 next_bus = TAILQ_NEXT(bus, links); 2642 2643 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2644 CAM_SIM_LOCK(bus->sim); 2645 retval = tr_func(bus, arg); 2646 CAM_SIM_UNLOCK(bus->sim); 2647 if (retval == 0) 2648 return(retval); 2649 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2650 } 2651 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2652 2653 return(retval); 2654 } 2655 2656 static int 2657 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2658 xpt_targetfunc_t *tr_func, void *arg) 2659 { 2660 struct cam_et *target, *next_target; 2661 int retval; 2662 2663 retval = 1; 2664 for (target = (start_target ? start_target : 2665 TAILQ_FIRST(&bus->et_entries)); 2666 target != NULL; target = next_target) { 2667 2668 next_target = TAILQ_NEXT(target, links); 2669 2670 retval = tr_func(target, arg); 2671 2672 if (retval == 0) 2673 return(retval); 2674 } 2675 2676 return(retval); 2677 } 2678 2679 static int 2680 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2681 xpt_devicefunc_t *tr_func, void *arg) 2682 { 2683 struct cam_ed *device, *next_device; 2684 int retval; 2685 2686 retval = 1; 2687 for (device = (start_device ? start_device : 2688 TAILQ_FIRST(&target->ed_entries)); 2689 device != NULL; 2690 device = next_device) { 2691 2692 next_device = TAILQ_NEXT(device, links); 2693 2694 retval = tr_func(device, arg); 2695 2696 if (retval == 0) 2697 return(retval); 2698 } 2699 2700 return(retval); 2701 } 2702 2703 static int 2704 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2705 xpt_periphfunc_t *tr_func, void *arg) 2706 { 2707 struct cam_periph *periph, *next_periph; 2708 int retval; 2709 2710 retval = 1; 2711 2712 for (periph = (start_periph ? start_periph : 2713 SLIST_FIRST(&device->periphs)); 2714 periph != NULL; 2715 periph = next_periph) { 2716 2717 next_periph = SLIST_NEXT(periph, periph_links); 2718 2719 retval = tr_func(periph, arg); 2720 if (retval == 0) 2721 return(retval); 2722 } 2723 2724 return(retval); 2725 } 2726 2727 static int 2728 xptpdrvtraverse(struct periph_driver **start_pdrv, 2729 xpt_pdrvfunc_t *tr_func, void *arg) 2730 { 2731 struct periph_driver **pdrv; 2732 int retval; 2733 2734 retval = 1; 2735 2736 /* 2737 * We don't traverse the peripheral driver list like we do the 2738 * other lists, because it is a linker set, and therefore cannot be 2739 * changed during runtime. If the peripheral driver list is ever 2740 * re-done to be something other than a linker set (i.e. it can 2741 * change while the system is running), the list traversal should 2742 * be modified to work like the other traversal functions. 2743 */ 2744 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2745 *pdrv != NULL; pdrv++) { 2746 retval = tr_func(pdrv, arg); 2747 2748 if (retval == 0) 2749 return(retval); 2750 } 2751 2752 return(retval); 2753 } 2754 2755 static int 2756 xptpdperiphtraverse(struct periph_driver **pdrv, 2757 struct cam_periph *start_periph, 2758 xpt_periphfunc_t *tr_func, void *arg) 2759 { 2760 struct cam_periph *periph, *next_periph; 2761 int retval; 2762 2763 retval = 1; 2764 2765 for (periph = (start_periph ? start_periph : 2766 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2767 periph = next_periph) { 2768 2769 next_periph = TAILQ_NEXT(periph, unit_links); 2770 2771 retval = tr_func(periph, arg); 2772 if (retval == 0) 2773 return(retval); 2774 } 2775 return(retval); 2776 } 2777 2778 static int 2779 xptdefbusfunc(struct cam_eb *bus, void *arg) 2780 { 2781 struct xpt_traverse_config *tr_config; 2782 2783 tr_config = (struct xpt_traverse_config *)arg; 2784 2785 if (tr_config->depth == XPT_DEPTH_BUS) { 2786 xpt_busfunc_t *tr_func; 2787 2788 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2789 2790 return(tr_func(bus, tr_config->tr_arg)); 2791 } else 2792 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2793 } 2794 2795 static int 2796 xptdeftargetfunc(struct cam_et *target, void *arg) 2797 { 2798 struct xpt_traverse_config *tr_config; 2799 2800 tr_config = (struct xpt_traverse_config *)arg; 2801 2802 if (tr_config->depth == XPT_DEPTH_TARGET) { 2803 xpt_targetfunc_t *tr_func; 2804 2805 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2806 2807 return(tr_func(target, tr_config->tr_arg)); 2808 } else 2809 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2810 } 2811 2812 static int 2813 xptdefdevicefunc(struct cam_ed *device, void *arg) 2814 { 2815 struct xpt_traverse_config *tr_config; 2816 2817 tr_config = (struct xpt_traverse_config *)arg; 2818 2819 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2820 xpt_devicefunc_t *tr_func; 2821 2822 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2823 2824 return(tr_func(device, tr_config->tr_arg)); 2825 } else 2826 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2827 } 2828 2829 static int 2830 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2831 { 2832 struct xpt_traverse_config *tr_config; 2833 xpt_periphfunc_t *tr_func; 2834 2835 tr_config = (struct xpt_traverse_config *)arg; 2836 2837 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2838 2839 /* 2840 * Unlike the other default functions, we don't check for depth 2841 * here. The peripheral driver level is the last level in the EDT, 2842 * so if we're here, we should execute the function in question. 2843 */ 2844 return(tr_func(periph, tr_config->tr_arg)); 2845 } 2846 2847 /* 2848 * Execute the given function for every bus in the EDT. 2849 */ 2850 static int 2851 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2852 { 2853 struct xpt_traverse_config tr_config; 2854 2855 tr_config.depth = XPT_DEPTH_BUS; 2856 tr_config.tr_func = tr_func; 2857 tr_config.tr_arg = arg; 2858 2859 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2860 } 2861 2862 /* 2863 * Execute the given function for every device in the EDT. 2864 */ 2865 static int 2866 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2867 { 2868 struct xpt_traverse_config tr_config; 2869 2870 tr_config.depth = XPT_DEPTH_DEVICE; 2871 tr_config.tr_func = tr_func; 2872 tr_config.tr_arg = arg; 2873 2874 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2875 } 2876 2877 static int 2878 xptsetasyncfunc(struct cam_ed *device, void *arg) 2879 { 2880 struct cam_path path; 2881 struct ccb_getdev cgd; 2882 struct async_node *cur_entry; 2883 2884 cur_entry = (struct async_node *)arg; 2885 2886 /* 2887 * Don't report unconfigured devices (Wildcard devs, 2888 * devices only for target mode, device instances 2889 * that have been invalidated but are waiting for 2890 * their last reference count to be released). 2891 */ 2892 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2893 return (1); 2894 2895 xpt_compile_path(&path, 2896 NULL, 2897 device->target->bus->path_id, 2898 device->target->target_id, 2899 device->lun_id); 2900 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2901 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2902 xpt_action((union ccb *)&cgd); 2903 cur_entry->callback(cur_entry->callback_arg, 2904 AC_FOUND_DEVICE, 2905 &path, &cgd); 2906 xpt_release_path(&path); 2907 2908 return(1); 2909 } 2910 2911 static int 2912 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2913 { 2914 struct cam_path path; 2915 struct ccb_pathinq cpi; 2916 struct async_node *cur_entry; 2917 2918 cur_entry = (struct async_node *)arg; 2919 2920 xpt_compile_path(&path, /*periph*/NULL, 2921 bus->sim->path_id, 2922 CAM_TARGET_WILDCARD, 2923 CAM_LUN_WILDCARD); 2924 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2925 cpi.ccb_h.func_code = XPT_PATH_INQ; 2926 xpt_action((union ccb *)&cpi); 2927 cur_entry->callback(cur_entry->callback_arg, 2928 AC_PATH_REGISTERED, 2929 &path, &cpi); 2930 xpt_release_path(&path); 2931 2932 return(1); 2933 } 2934 2935 static void 2936 xpt_action_sasync_cb(void *context, int pending) 2937 { 2938 struct async_node *cur_entry; 2939 struct xpt_task *task; 2940 uint32_t added; 2941 2942 task = (struct xpt_task *)context; 2943 cur_entry = (struct async_node *)task->data1; 2944 added = task->data2; 2945 2946 if ((added & AC_FOUND_DEVICE) != 0) { 2947 /* 2948 * Get this peripheral up to date with all 2949 * the currently existing devices. 2950 */ 2951 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 2952 } 2953 if ((added & AC_PATH_REGISTERED) != 0) { 2954 /* 2955 * Get this peripheral up to date with all 2956 * the currently existing busses. 2957 */ 2958 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 2959 } 2960 2961 kfree(task, M_CAMXPT); 2962 } 2963 2964 void 2965 xpt_action(union ccb *start_ccb) 2966 { 2967 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2968 2969 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2970 2971 switch (start_ccb->ccb_h.func_code) { 2972 case XPT_SCSI_IO: 2973 { 2974 struct cam_ed *device; 2975 #ifdef CAMDEBUG 2976 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2977 struct cam_path *path; 2978 2979 path = start_ccb->ccb_h.path; 2980 #endif 2981 2982 /* 2983 * For the sake of compatibility with SCSI-1 2984 * devices that may not understand the identify 2985 * message, we include lun information in the 2986 * second byte of all commands. SCSI-1 specifies 2987 * that luns are a 3 bit value and reserves only 3 2988 * bits for lun information in the CDB. Later 2989 * revisions of the SCSI spec allow for more than 8 2990 * luns, but have deprecated lun information in the 2991 * CDB. So, if the lun won't fit, we must omit. 2992 * 2993 * Also be aware that during initial probing for devices, 2994 * the inquiry information is unknown but initialized to 0. 2995 * This means that this code will be exercised while probing 2996 * devices with an ANSI revision greater than 2. 2997 */ 2998 device = start_ccb->ccb_h.path->device; 2999 if (device->protocol_version <= SCSI_REV_2 3000 && start_ccb->ccb_h.target_lun < 8 3001 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 3002 3003 start_ccb->csio.cdb_io.cdb_bytes[1] |= 3004 start_ccb->ccb_h.target_lun << 5; 3005 } 3006 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 3007 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 3008 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 3009 &path->device->inq_data), 3010 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 3011 cdb_str, sizeof(cdb_str)))); 3012 /* FALLTHROUGH */ 3013 } 3014 case XPT_TARGET_IO: 3015 case XPT_CONT_TARGET_IO: 3016 start_ccb->csio.sense_resid = 0; 3017 start_ccb->csio.resid = 0; 3018 /* FALLTHROUGH */ 3019 case XPT_RESET_DEV: 3020 case XPT_ENG_EXEC: 3021 { 3022 struct cam_path *path; 3023 struct cam_sim *sim; 3024 int runq; 3025 3026 path = start_ccb->ccb_h.path; 3027 3028 sim = path->bus->sim; 3029 if (sim == &cam_dead_sim) { 3030 /* The SIM has gone; just execute the CCB directly. */ 3031 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); 3032 (*(sim->sim_action))(sim, start_ccb); 3033 break; 3034 } 3035 3036 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 3037 if (path->device->qfrozen_cnt == 0) 3038 runq = xpt_schedule_dev_sendq(path->bus, path->device); 3039 else 3040 runq = 0; 3041 if (runq != 0) 3042 xpt_run_dev_sendq(path->bus); 3043 break; 3044 } 3045 case XPT_SET_TRAN_SETTINGS: 3046 { 3047 xpt_set_transfer_settings(&start_ccb->cts, 3048 start_ccb->ccb_h.path->device, 3049 /*async_update*/FALSE); 3050 break; 3051 } 3052 case XPT_CALC_GEOMETRY: 3053 { 3054 struct cam_sim *sim; 3055 3056 /* Filter out garbage */ 3057 if (start_ccb->ccg.block_size == 0 3058 || start_ccb->ccg.volume_size == 0) { 3059 start_ccb->ccg.cylinders = 0; 3060 start_ccb->ccg.heads = 0; 3061 start_ccb->ccg.secs_per_track = 0; 3062 start_ccb->ccb_h.status = CAM_REQ_CMP; 3063 break; 3064 } 3065 sim = start_ccb->ccb_h.path->bus->sim; 3066 (*(sim->sim_action))(sim, start_ccb); 3067 break; 3068 } 3069 case XPT_ABORT: 3070 { 3071 union ccb* abort_ccb; 3072 3073 abort_ccb = start_ccb->cab.abort_ccb; 3074 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 3075 3076 if (abort_ccb->ccb_h.pinfo.index >= 0) { 3077 struct cam_ccbq *ccbq; 3078 3079 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3080 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3081 abort_ccb->ccb_h.status = 3082 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3083 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3084 xpt_done(abort_ccb); 3085 start_ccb->ccb_h.status = CAM_REQ_CMP; 3086 break; 3087 } 3088 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3089 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3090 /* 3091 * We've caught this ccb en route to 3092 * the SIM. Flag it for abort and the 3093 * SIM will do so just before starting 3094 * real work on the CCB. 3095 */ 3096 abort_ccb->ccb_h.status = 3097 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3098 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3099 start_ccb->ccb_h.status = CAM_REQ_CMP; 3100 break; 3101 } 3102 } 3103 if (XPT_FC_IS_QUEUED(abort_ccb) 3104 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3105 /* 3106 * It's already completed but waiting 3107 * for our SWI to get to it. 3108 */ 3109 start_ccb->ccb_h.status = CAM_UA_ABORT; 3110 break; 3111 } 3112 /* 3113 * If we weren't able to take care of the abort request 3114 * in the XPT, pass the request down to the SIM for processing. 3115 */ 3116 /* FALLTHROUGH */ 3117 } 3118 case XPT_ACCEPT_TARGET_IO: 3119 case XPT_EN_LUN: 3120 case XPT_IMMED_NOTIFY: 3121 case XPT_NOTIFY_ACK: 3122 case XPT_GET_TRAN_SETTINGS: 3123 case XPT_RESET_BUS: 3124 { 3125 struct cam_sim *sim; 3126 3127 sim = start_ccb->ccb_h.path->bus->sim; 3128 (*(sim->sim_action))(sim, start_ccb); 3129 break; 3130 } 3131 case XPT_PATH_INQ: 3132 { 3133 struct cam_sim *sim; 3134 3135 sim = start_ccb->ccb_h.path->bus->sim; 3136 (*(sim->sim_action))(sim, start_ccb); 3137 break; 3138 } 3139 case XPT_PATH_STATS: 3140 start_ccb->cpis.last_reset = 3141 start_ccb->ccb_h.path->bus->last_reset; 3142 start_ccb->ccb_h.status = CAM_REQ_CMP; 3143 break; 3144 case XPT_GDEV_TYPE: 3145 { 3146 struct cam_ed *dev; 3147 3148 dev = start_ccb->ccb_h.path->device; 3149 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3150 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3151 } else { 3152 struct ccb_getdev *cgd; 3153 struct cam_eb *bus; 3154 struct cam_et *tar; 3155 3156 cgd = &start_ccb->cgd; 3157 bus = cgd->ccb_h.path->bus; 3158 tar = cgd->ccb_h.path->target; 3159 cgd->inq_data = dev->inq_data; 3160 cgd->ccb_h.status = CAM_REQ_CMP; 3161 cgd->serial_num_len = dev->serial_num_len; 3162 if ((dev->serial_num_len > 0) 3163 && (dev->serial_num != NULL)) 3164 bcopy(dev->serial_num, cgd->serial_num, 3165 dev->serial_num_len); 3166 } 3167 break; 3168 } 3169 case XPT_GDEV_STATS: 3170 { 3171 struct cam_ed *dev; 3172 3173 dev = start_ccb->ccb_h.path->device; 3174 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3175 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3176 } else { 3177 struct ccb_getdevstats *cgds; 3178 struct cam_eb *bus; 3179 struct cam_et *tar; 3180 3181 cgds = &start_ccb->cgds; 3182 bus = cgds->ccb_h.path->bus; 3183 tar = cgds->ccb_h.path->target; 3184 cgds->dev_openings = dev->ccbq.dev_openings; 3185 cgds->dev_active = dev->ccbq.dev_active; 3186 cgds->devq_openings = dev->ccbq.devq_openings; 3187 cgds->devq_queued = dev->ccbq.queue.entries; 3188 cgds->held = dev->ccbq.held; 3189 cgds->last_reset = tar->last_reset; 3190 cgds->maxtags = dev->quirk->maxtags; 3191 cgds->mintags = dev->quirk->mintags; 3192 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3193 cgds->last_reset = bus->last_reset; 3194 cgds->ccb_h.status = CAM_REQ_CMP; 3195 } 3196 break; 3197 } 3198 case XPT_GDEVLIST: 3199 { 3200 struct cam_periph *nperiph; 3201 struct periph_list *periph_head; 3202 struct ccb_getdevlist *cgdl; 3203 u_int i; 3204 struct cam_ed *device; 3205 int found; 3206 3207 3208 found = 0; 3209 3210 /* 3211 * Don't want anyone mucking with our data. 3212 */ 3213 device = start_ccb->ccb_h.path->device; 3214 periph_head = &device->periphs; 3215 cgdl = &start_ccb->cgdl; 3216 3217 /* 3218 * Check and see if the list has changed since the user 3219 * last requested a list member. If so, tell them that the 3220 * list has changed, and therefore they need to start over 3221 * from the beginning. 3222 */ 3223 if ((cgdl->index != 0) && 3224 (cgdl->generation != device->generation)) { 3225 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3226 break; 3227 } 3228 3229 /* 3230 * Traverse the list of peripherals and attempt to find 3231 * the requested peripheral. 3232 */ 3233 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3234 (nperiph != NULL) && (i <= cgdl->index); 3235 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3236 if (i == cgdl->index) { 3237 strncpy(cgdl->periph_name, 3238 nperiph->periph_name, 3239 DEV_IDLEN); 3240 cgdl->unit_number = nperiph->unit_number; 3241 found = 1; 3242 } 3243 } 3244 if (found == 0) { 3245 cgdl->status = CAM_GDEVLIST_ERROR; 3246 break; 3247 } 3248 3249 if (nperiph == NULL) 3250 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3251 else 3252 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3253 3254 cgdl->index++; 3255 cgdl->generation = device->generation; 3256 3257 cgdl->ccb_h.status = CAM_REQ_CMP; 3258 break; 3259 } 3260 case XPT_DEV_MATCH: 3261 { 3262 dev_pos_type position_type; 3263 struct ccb_dev_match *cdm; 3264 int ret; 3265 3266 cdm = &start_ccb->cdm; 3267 3268 /* 3269 * There are two ways of getting at information in the EDT. 3270 * The first way is via the primary EDT tree. It starts 3271 * with a list of busses, then a list of targets on a bus, 3272 * then devices/luns on a target, and then peripherals on a 3273 * device/lun. The "other" way is by the peripheral driver 3274 * lists. The peripheral driver lists are organized by 3275 * peripheral driver. (obviously) So it makes sense to 3276 * use the peripheral driver list if the user is looking 3277 * for something like "da1", or all "da" devices. If the 3278 * user is looking for something on a particular bus/target 3279 * or lun, it's generally better to go through the EDT tree. 3280 */ 3281 3282 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3283 position_type = cdm->pos.position_type; 3284 else { 3285 u_int i; 3286 3287 position_type = CAM_DEV_POS_NONE; 3288 3289 for (i = 0; i < cdm->num_patterns; i++) { 3290 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3291 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3292 position_type = CAM_DEV_POS_EDT; 3293 break; 3294 } 3295 } 3296 3297 if (cdm->num_patterns == 0) 3298 position_type = CAM_DEV_POS_EDT; 3299 else if (position_type == CAM_DEV_POS_NONE) 3300 position_type = CAM_DEV_POS_PDRV; 3301 } 3302 3303 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3304 case CAM_DEV_POS_EDT: 3305 ret = xptedtmatch(cdm); 3306 break; 3307 case CAM_DEV_POS_PDRV: 3308 ret = xptperiphlistmatch(cdm); 3309 break; 3310 default: 3311 cdm->status = CAM_DEV_MATCH_ERROR; 3312 break; 3313 } 3314 3315 if (cdm->status == CAM_DEV_MATCH_ERROR) 3316 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3317 else 3318 start_ccb->ccb_h.status = CAM_REQ_CMP; 3319 3320 break; 3321 } 3322 case XPT_SASYNC_CB: 3323 { 3324 struct ccb_setasync *csa; 3325 struct async_node *cur_entry; 3326 struct async_list *async_head; 3327 u_int32_t added; 3328 3329 csa = &start_ccb->csa; 3330 added = csa->event_enable; 3331 async_head = &csa->ccb_h.path->device->asyncs; 3332 3333 /* 3334 * If there is already an entry for us, simply 3335 * update it. 3336 */ 3337 cur_entry = SLIST_FIRST(async_head); 3338 while (cur_entry != NULL) { 3339 if ((cur_entry->callback_arg == csa->callback_arg) 3340 && (cur_entry->callback == csa->callback)) 3341 break; 3342 cur_entry = SLIST_NEXT(cur_entry, links); 3343 } 3344 3345 if (cur_entry != NULL) { 3346 /* 3347 * If the request has no flags set, 3348 * remove the entry. 3349 */ 3350 added &= ~cur_entry->event_enable; 3351 if (csa->event_enable == 0) { 3352 SLIST_REMOVE(async_head, cur_entry, 3353 async_node, links); 3354 csa->ccb_h.path->device->refcount--; 3355 kfree(cur_entry, M_CAMXPT); 3356 } else { 3357 cur_entry->event_enable = csa->event_enable; 3358 } 3359 } else { 3360 cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, 3361 M_INTWAIT); 3362 cur_entry->event_enable = csa->event_enable; 3363 cur_entry->callback_arg = csa->callback_arg; 3364 cur_entry->callback = csa->callback; 3365 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3366 csa->ccb_h.path->device->refcount++; 3367 } 3368 3369 /* 3370 * Need to decouple this operation via a taskqueue so that 3371 * the locking doesn't become a mess. 3372 */ 3373 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 3374 struct xpt_task *task; 3375 3376 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 3377 M_INTWAIT); 3378 3379 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 3380 task->data1 = cur_entry; 3381 task->data2 = added; 3382 taskqueue_enqueue(taskqueue_thread[mycpuid], 3383 &task->task); 3384 } 3385 3386 start_ccb->ccb_h.status = CAM_REQ_CMP; 3387 break; 3388 } 3389 case XPT_REL_SIMQ: 3390 { 3391 struct ccb_relsim *crs; 3392 struct cam_ed *dev; 3393 3394 crs = &start_ccb->crs; 3395 dev = crs->ccb_h.path->device; 3396 if (dev == NULL) { 3397 3398 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3399 break; 3400 } 3401 3402 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3403 3404 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 3405 /* Don't ever go below one opening */ 3406 if (crs->openings > 0) { 3407 xpt_dev_ccbq_resize(crs->ccb_h.path, 3408 crs->openings); 3409 3410 if (bootverbose) { 3411 xpt_print(crs->ccb_h.path, 3412 "tagged openings now %d\n", 3413 crs->openings); 3414 } 3415 } 3416 } 3417 } 3418 3419 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3420 3421 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3422 3423 /* 3424 * Just extend the old timeout and decrement 3425 * the freeze count so that a single timeout 3426 * is sufficient for releasing the queue. 3427 */ 3428 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3429 callout_stop(&dev->callout); 3430 } else { 3431 3432 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3433 } 3434 3435 callout_reset(&dev->callout, 3436 (crs->release_timeout * hz) / 1000, 3437 xpt_release_devq_timeout, dev); 3438 3439 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3440 3441 } 3442 3443 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3444 3445 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3446 /* 3447 * Decrement the freeze count so that a single 3448 * completion is still sufficient to unfreeze 3449 * the queue. 3450 */ 3451 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3452 } else { 3453 3454 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3455 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3456 } 3457 } 3458 3459 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3460 3461 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3462 || (dev->ccbq.dev_active == 0)) { 3463 3464 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3465 } else { 3466 3467 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3468 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3469 } 3470 } 3471 3472 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3473 3474 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3475 /*run_queue*/TRUE); 3476 } 3477 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3478 start_ccb->ccb_h.status = CAM_REQ_CMP; 3479 break; 3480 } 3481 case XPT_SCAN_BUS: 3482 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3483 break; 3484 case XPT_SCAN_LUN: 3485 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3486 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3487 start_ccb); 3488 break; 3489 case XPT_DEBUG: { 3490 #ifdef CAMDEBUG 3491 #ifdef CAM_DEBUG_DELAY 3492 cam_debug_delay = CAM_DEBUG_DELAY; 3493 #endif 3494 cam_dflags = start_ccb->cdbg.flags; 3495 if (cam_dpath != NULL) { 3496 xpt_free_path(cam_dpath); 3497 cam_dpath = NULL; 3498 } 3499 3500 if (cam_dflags != CAM_DEBUG_NONE) { 3501 if (xpt_create_path(&cam_dpath, xpt_periph, 3502 start_ccb->ccb_h.path_id, 3503 start_ccb->ccb_h.target_id, 3504 start_ccb->ccb_h.target_lun) != 3505 CAM_REQ_CMP) { 3506 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3507 cam_dflags = CAM_DEBUG_NONE; 3508 } else { 3509 start_ccb->ccb_h.status = CAM_REQ_CMP; 3510 xpt_print(cam_dpath, "debugging flags now %x\n", 3511 cam_dflags); 3512 } 3513 } else { 3514 cam_dpath = NULL; 3515 start_ccb->ccb_h.status = CAM_REQ_CMP; 3516 } 3517 #else /* !CAMDEBUG */ 3518 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3519 #endif /* CAMDEBUG */ 3520 break; 3521 } 3522 case XPT_NOOP: 3523 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3524 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3525 start_ccb->ccb_h.status = CAM_REQ_CMP; 3526 break; 3527 default: 3528 case XPT_SDEV_TYPE: 3529 case XPT_TERM_IO: 3530 case XPT_ENG_INQ: 3531 /* XXX Implement */ 3532 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3533 break; 3534 } 3535 } 3536 3537 void 3538 xpt_polled_action(union ccb *start_ccb) 3539 { 3540 u_int32_t timeout; 3541 struct cam_sim *sim; 3542 struct cam_devq *devq; 3543 struct cam_ed *dev; 3544 3545 timeout = start_ccb->ccb_h.timeout; 3546 sim = start_ccb->ccb_h.path->bus->sim; 3547 devq = sim->devq; 3548 dev = start_ccb->ccb_h.path->device; 3549 3550 sim_lock_assert_owned(sim->lock); 3551 3552 /* 3553 * Steal an opening so that no other queued requests 3554 * can get it before us while we simulate interrupts. 3555 */ 3556 dev->ccbq.devq_openings--; 3557 dev->ccbq.dev_openings--; 3558 3559 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3560 && (--timeout > 0)) { 3561 DELAY(1000); 3562 (*(sim->sim_poll))(sim); 3563 camisr_runqueue(sim); 3564 } 3565 3566 dev->ccbq.devq_openings++; 3567 dev->ccbq.dev_openings++; 3568 3569 if (timeout != 0) { 3570 xpt_action(start_ccb); 3571 while(--timeout > 0) { 3572 (*(sim->sim_poll))(sim); 3573 camisr_runqueue(sim); 3574 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3575 != CAM_REQ_INPROG) 3576 break; 3577 DELAY(1000); 3578 } 3579 if (timeout == 0) { 3580 /* 3581 * XXX Is it worth adding a sim_timeout entry 3582 * point so we can attempt recovery? If 3583 * this is only used for dumps, I don't think 3584 * it is. 3585 */ 3586 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3587 } 3588 } else { 3589 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3590 } 3591 } 3592 3593 /* 3594 * Schedule a peripheral driver to receive a ccb when it's 3595 * target device has space for more transactions. 3596 */ 3597 void 3598 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3599 { 3600 struct cam_ed *device; 3601 union ccb *work_ccb; 3602 int runq; 3603 3604 sim_lock_assert_owned(perph->sim->lock); 3605 3606 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3607 device = perph->path->device; 3608 if (periph_is_queued(perph)) { 3609 /* Simply reorder based on new priority */ 3610 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3611 (" change priority to %d\n", new_priority)); 3612 if (new_priority < perph->pinfo.priority) { 3613 camq_change_priority(&device->drvq, 3614 perph->pinfo.index, 3615 new_priority); 3616 } 3617 runq = 0; 3618 } else if (perph->path->bus->sim == &cam_dead_sim) { 3619 /* The SIM is gone so just call periph_start directly. */ 3620 work_ccb = xpt_get_ccb(perph->path->device); 3621 if (work_ccb == NULL) 3622 return; /* XXX */ 3623 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); 3624 perph->pinfo.priority = new_priority; 3625 perph->periph_start(perph, work_ccb); 3626 return; 3627 } else { 3628 /* New entry on the queue */ 3629 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3630 (" added periph to queue\n")); 3631 perph->pinfo.priority = new_priority; 3632 perph->pinfo.generation = ++device->drvq.generation; 3633 camq_insert(&device->drvq, &perph->pinfo); 3634 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3635 } 3636 if (runq != 0) { 3637 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3638 (" calling xpt_run_devq\n")); 3639 xpt_run_dev_allocq(perph->path->bus); 3640 } 3641 } 3642 3643 3644 /* 3645 * Schedule a device to run on a given queue. 3646 * If the device was inserted as a new entry on the queue, 3647 * return 1 meaning the device queue should be run. If we 3648 * were already queued, implying someone else has already 3649 * started the queue, return 0 so the caller doesn't attempt 3650 * to run the queue. 3651 */ 3652 static int 3653 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3654 u_int32_t new_priority) 3655 { 3656 int retval; 3657 u_int32_t old_priority; 3658 3659 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3660 3661 old_priority = pinfo->priority; 3662 3663 /* 3664 * Are we already queued? 3665 */ 3666 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3667 /* Simply reorder based on new priority */ 3668 if (new_priority < old_priority) { 3669 camq_change_priority(queue, pinfo->index, 3670 new_priority); 3671 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3672 ("changed priority to %d\n", 3673 new_priority)); 3674 } 3675 retval = 0; 3676 } else { 3677 /* New entry on the queue */ 3678 if (new_priority < old_priority) 3679 pinfo->priority = new_priority; 3680 3681 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3682 ("Inserting onto queue\n")); 3683 pinfo->generation = ++queue->generation; 3684 camq_insert(queue, pinfo); 3685 retval = 1; 3686 } 3687 return (retval); 3688 } 3689 3690 static void 3691 xpt_run_dev_allocq(struct cam_eb *bus) 3692 { 3693 struct cam_devq *devq; 3694 3695 if ((devq = bus->sim->devq) == NULL) { 3696 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3697 return; 3698 } 3699 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3700 3701 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3702 (" qfrozen_cnt == 0x%x, entries == %d, " 3703 "openings == %d, active == %d\n", 3704 devq->alloc_queue.qfrozen_cnt, 3705 devq->alloc_queue.entries, 3706 devq->alloc_openings, 3707 devq->alloc_active)); 3708 3709 devq->alloc_queue.qfrozen_cnt++; 3710 while ((devq->alloc_queue.entries > 0) 3711 && (devq->alloc_openings > 0) 3712 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3713 struct cam_ed_qinfo *qinfo; 3714 struct cam_ed *device; 3715 union ccb *work_ccb; 3716 struct cam_periph *drv; 3717 struct camq *drvq; 3718 3719 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3720 CAMQ_HEAD); 3721 device = qinfo->device; 3722 3723 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3724 ("running device %p\n", device)); 3725 3726 drvq = &device->drvq; 3727 3728 #ifdef CAMDEBUG 3729 if (drvq->entries <= 0) { 3730 panic("xpt_run_dev_allocq: " 3731 "Device on queue without any work to do"); 3732 } 3733 #endif 3734 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3735 devq->alloc_openings--; 3736 devq->alloc_active++; 3737 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3738 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3739 drv->pinfo.priority); 3740 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3741 ("calling periph start\n")); 3742 drv->periph_start(drv, work_ccb); 3743 } else { 3744 /* 3745 * Malloc failure in alloc_ccb 3746 */ 3747 /* 3748 * XXX add us to a list to be run from free_ccb 3749 * if we don't have any ccbs active on this 3750 * device queue otherwise we may never get run 3751 * again. 3752 */ 3753 break; 3754 } 3755 3756 if (drvq->entries > 0) { 3757 /* We have more work. Attempt to reschedule */ 3758 xpt_schedule_dev_allocq(bus, device); 3759 } 3760 } 3761 devq->alloc_queue.qfrozen_cnt--; 3762 } 3763 3764 static void 3765 xpt_run_dev_sendq(struct cam_eb *bus) 3766 { 3767 struct cam_devq *devq; 3768 3769 if ((devq = bus->sim->devq) == NULL) { 3770 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3771 return; 3772 } 3773 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3774 3775 devq->send_queue.qfrozen_cnt++; 3776 while ((devq->send_queue.entries > 0) 3777 && (devq->send_openings > 0)) { 3778 struct cam_ed_qinfo *qinfo; 3779 struct cam_ed *device; 3780 union ccb *work_ccb; 3781 struct cam_sim *sim; 3782 3783 if (devq->send_queue.qfrozen_cnt > 1) { 3784 break; 3785 } 3786 3787 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3788 CAMQ_HEAD); 3789 device = qinfo->device; 3790 3791 /* 3792 * If the device has been "frozen", don't attempt 3793 * to run it. 3794 */ 3795 if (device->qfrozen_cnt > 0) { 3796 continue; 3797 } 3798 3799 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3800 ("running device %p\n", device)); 3801 3802 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3803 if (work_ccb == NULL) { 3804 kprintf("device on run queue with no ccbs???\n"); 3805 continue; 3806 } 3807 3808 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3809 3810 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 3811 if (xsoftc.num_highpower <= 0) { 3812 /* 3813 * We got a high power command, but we 3814 * don't have any available slots. Freeze 3815 * the device queue until we have a slot 3816 * available. 3817 */ 3818 device->qfrozen_cnt++; 3819 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3820 &work_ccb->ccb_h, 3821 xpt_links.stqe); 3822 3823 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3824 continue; 3825 } else { 3826 /* 3827 * Consume a high power slot while 3828 * this ccb runs. 3829 */ 3830 xsoftc.num_highpower--; 3831 } 3832 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3833 } 3834 devq->active_dev = device; 3835 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3836 3837 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3838 3839 devq->send_openings--; 3840 devq->send_active++; 3841 3842 if (device->ccbq.queue.entries > 0) 3843 xpt_schedule_dev_sendq(bus, device); 3844 3845 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3846 /* 3847 * The client wants to freeze the queue 3848 * after this CCB is sent. 3849 */ 3850 device->qfrozen_cnt++; 3851 } 3852 3853 /* In Target mode, the peripheral driver knows best... */ 3854 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3855 if ((device->inq_flags & SID_CmdQue) != 0 3856 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3857 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3858 else 3859 /* 3860 * Clear this in case of a retried CCB that 3861 * failed due to a rejected tag. 3862 */ 3863 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3864 } 3865 3866 /* 3867 * Device queues can be shared among multiple sim instances 3868 * that reside on different busses. Use the SIM in the queue 3869 * CCB's path, rather than the one in the bus that was passed 3870 * into this function. 3871 */ 3872 sim = work_ccb->ccb_h.path->bus->sim; 3873 (*(sim->sim_action))(sim, work_ccb); 3874 3875 devq->active_dev = NULL; 3876 } 3877 devq->send_queue.qfrozen_cnt--; 3878 } 3879 3880 /* 3881 * This function merges stuff from the slave ccb into the master ccb, while 3882 * keeping important fields in the master ccb constant. 3883 */ 3884 void 3885 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3886 { 3887 /* 3888 * Pull fields that are valid for peripheral drivers to set 3889 * into the master CCB along with the CCB "payload". 3890 */ 3891 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3892 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3893 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3894 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3895 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3896 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3897 } 3898 3899 void 3900 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3901 { 3902 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3903 callout_init(&ccb_h->timeout_ch); 3904 ccb_h->pinfo.priority = priority; 3905 ccb_h->path = path; 3906 ccb_h->path_id = path->bus->path_id; 3907 if (path->target) 3908 ccb_h->target_id = path->target->target_id; 3909 else 3910 ccb_h->target_id = CAM_TARGET_WILDCARD; 3911 if (path->device) { 3912 ccb_h->target_lun = path->device->lun_id; 3913 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3914 } else { 3915 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3916 } 3917 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3918 ccb_h->flags = 0; 3919 } 3920 3921 /* Path manipulation functions */ 3922 cam_status 3923 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3924 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3925 { 3926 struct cam_path *path; 3927 cam_status status; 3928 3929 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); 3930 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3931 if (status != CAM_REQ_CMP) { 3932 kfree(path, M_CAMXPT); 3933 path = NULL; 3934 } 3935 *new_path_ptr = path; 3936 return (status); 3937 } 3938 3939 cam_status 3940 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3941 struct cam_periph *periph, path_id_t path_id, 3942 target_id_t target_id, lun_id_t lun_id) 3943 { 3944 struct cam_path *path; 3945 struct cam_eb *bus = NULL; 3946 cam_status status; 3947 int need_unlock = 0; 3948 3949 path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3950 3951 if (path_id != CAM_BUS_WILDCARD) { 3952 bus = xpt_find_bus(path_id); 3953 if (bus != NULL) { 3954 need_unlock = 1; 3955 CAM_SIM_LOCK(bus->sim); 3956 } 3957 } 3958 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3959 if (need_unlock) 3960 CAM_SIM_UNLOCK(bus->sim); 3961 if (status != CAM_REQ_CMP) { 3962 kfree(path, M_CAMXPT); 3963 path = NULL; 3964 } 3965 *new_path_ptr = path; 3966 return (status); 3967 } 3968 3969 static cam_status 3970 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3971 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3972 { 3973 struct cam_eb *bus; 3974 struct cam_et *target; 3975 struct cam_ed *device; 3976 cam_status status; 3977 3978 status = CAM_REQ_CMP; /* Completed without error */ 3979 target = NULL; /* Wildcarded */ 3980 device = NULL; /* Wildcarded */ 3981 3982 /* 3983 * We will potentially modify the EDT, so block interrupts 3984 * that may attempt to create cam paths. 3985 */ 3986 bus = xpt_find_bus(path_id); 3987 if (bus == NULL) { 3988 status = CAM_PATH_INVALID; 3989 } else { 3990 target = xpt_find_target(bus, target_id); 3991 if (target == NULL) { 3992 /* Create one */ 3993 struct cam_et *new_target; 3994 3995 new_target = xpt_alloc_target(bus, target_id); 3996 if (new_target == NULL) { 3997 status = CAM_RESRC_UNAVAIL; 3998 } else { 3999 target = new_target; 4000 } 4001 } 4002 if (target != NULL) { 4003 device = xpt_find_device(target, lun_id); 4004 if (device == NULL) { 4005 /* Create one */ 4006 struct cam_ed *new_device; 4007 4008 new_device = xpt_alloc_device(bus, 4009 target, 4010 lun_id); 4011 if (new_device == NULL) { 4012 status = CAM_RESRC_UNAVAIL; 4013 } else { 4014 device = new_device; 4015 } 4016 } 4017 } 4018 } 4019 4020 /* 4021 * Only touch the user's data if we are successful. 4022 */ 4023 if (status == CAM_REQ_CMP) { 4024 new_path->periph = perph; 4025 new_path->bus = bus; 4026 new_path->target = target; 4027 new_path->device = device; 4028 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 4029 } else { 4030 if (device != NULL) 4031 xpt_release_device(bus, target, device); 4032 if (target != NULL) 4033 xpt_release_target(bus, target); 4034 if (bus != NULL) 4035 xpt_release_bus(bus); 4036 } 4037 return (status); 4038 } 4039 4040 static void 4041 xpt_release_path(struct cam_path *path) 4042 { 4043 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 4044 if (path->device != NULL) { 4045 xpt_release_device(path->bus, path->target, path->device); 4046 path->device = NULL; 4047 } 4048 if (path->target != NULL) { 4049 xpt_release_target(path->bus, path->target); 4050 path->target = NULL; 4051 } 4052 if (path->bus != NULL) { 4053 xpt_release_bus(path->bus); 4054 path->bus = NULL; 4055 } 4056 } 4057 4058 void 4059 xpt_free_path(struct cam_path *path) 4060 { 4061 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 4062 xpt_release_path(path); 4063 kfree(path, M_CAMXPT); 4064 } 4065 4066 4067 /* 4068 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 4069 * in path1, 2 for match with wildcards in path2. 4070 */ 4071 int 4072 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 4073 { 4074 int retval = 0; 4075 4076 if (path1->bus != path2->bus) { 4077 if (path1->bus->path_id == CAM_BUS_WILDCARD) 4078 retval = 1; 4079 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 4080 retval = 2; 4081 else 4082 return (-1); 4083 } 4084 if (path1->target != path2->target) { 4085 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 4086 if (retval == 0) 4087 retval = 1; 4088 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 4089 retval = 2; 4090 else 4091 return (-1); 4092 } 4093 if (path1->device != path2->device) { 4094 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4095 if (retval == 0) 4096 retval = 1; 4097 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4098 retval = 2; 4099 else 4100 return (-1); 4101 } 4102 return (retval); 4103 } 4104 4105 void 4106 xpt_print_path(struct cam_path *path) 4107 { 4108 4109 if (path == NULL) 4110 kprintf("(nopath): "); 4111 else { 4112 if (path->periph != NULL) 4113 kprintf("(%s%d:", path->periph->periph_name, 4114 path->periph->unit_number); 4115 else 4116 kprintf("(noperiph:"); 4117 4118 if (path->bus != NULL) 4119 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4120 path->bus->sim->unit_number, 4121 path->bus->sim->bus_id); 4122 else 4123 kprintf("nobus:"); 4124 4125 if (path->target != NULL) 4126 kprintf("%d:", path->target->target_id); 4127 else 4128 kprintf("X:"); 4129 4130 if (path->device != NULL) 4131 kprintf("%d): ", path->device->lun_id); 4132 else 4133 kprintf("X): "); 4134 } 4135 } 4136 4137 void 4138 xpt_print(struct cam_path *path, const char *fmt, ...) 4139 { 4140 __va_list ap; 4141 xpt_print_path(path); 4142 __va_start(ap, fmt); 4143 kvprintf(fmt, ap); 4144 __va_end(ap); 4145 } 4146 4147 int 4148 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4149 { 4150 struct sbuf sb; 4151 4152 sim_lock_assert_owned(path->bus->sim->lock); 4153 4154 sbuf_new(&sb, str, str_len, 0); 4155 4156 if (path == NULL) 4157 sbuf_printf(&sb, "(nopath): "); 4158 else { 4159 if (path->periph != NULL) 4160 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4161 path->periph->unit_number); 4162 else 4163 sbuf_printf(&sb, "(noperiph:"); 4164 4165 if (path->bus != NULL) 4166 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4167 path->bus->sim->unit_number, 4168 path->bus->sim->bus_id); 4169 else 4170 sbuf_printf(&sb, "nobus:"); 4171 4172 if (path->target != NULL) 4173 sbuf_printf(&sb, "%d:", path->target->target_id); 4174 else 4175 sbuf_printf(&sb, "X:"); 4176 4177 if (path->device != NULL) 4178 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4179 else 4180 sbuf_printf(&sb, "X): "); 4181 } 4182 sbuf_finish(&sb); 4183 4184 return(sbuf_len(&sb)); 4185 } 4186 4187 path_id_t 4188 xpt_path_path_id(struct cam_path *path) 4189 { 4190 sim_lock_assert_owned(path->bus->sim->lock); 4191 4192 return(path->bus->path_id); 4193 } 4194 4195 target_id_t 4196 xpt_path_target_id(struct cam_path *path) 4197 { 4198 sim_lock_assert_owned(path->bus->sim->lock); 4199 4200 if (path->target != NULL) 4201 return (path->target->target_id); 4202 else 4203 return (CAM_TARGET_WILDCARD); 4204 } 4205 4206 lun_id_t 4207 xpt_path_lun_id(struct cam_path *path) 4208 { 4209 sim_lock_assert_owned(path->bus->sim->lock); 4210 4211 if (path->device != NULL) 4212 return (path->device->lun_id); 4213 else 4214 return (CAM_LUN_WILDCARD); 4215 } 4216 4217 struct cam_sim * 4218 xpt_path_sim(struct cam_path *path) 4219 { 4220 return (path->bus->sim); 4221 } 4222 4223 struct cam_periph* 4224 xpt_path_periph(struct cam_path *path) 4225 { 4226 sim_lock_assert_owned(path->bus->sim->lock); 4227 4228 return (path->periph); 4229 } 4230 4231 /* 4232 * Release a CAM control block for the caller. Remit the cost of the structure 4233 * to the device referenced by the path. If the this device had no 'credits' 4234 * and peripheral drivers have registered async callbacks for this notification 4235 * call them now. 4236 */ 4237 void 4238 xpt_release_ccb(union ccb *free_ccb) 4239 { 4240 struct cam_path *path; 4241 struct cam_ed *device; 4242 struct cam_eb *bus; 4243 struct cam_sim *sim; 4244 4245 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4246 path = free_ccb->ccb_h.path; 4247 device = path->device; 4248 bus = path->bus; 4249 sim = bus->sim; 4250 4251 sim_lock_assert_owned(sim->lock); 4252 4253 cam_ccbq_release_opening(&device->ccbq); 4254 if (sim->ccb_count > sim->max_ccbs) { 4255 xpt_free_ccb(free_ccb); 4256 sim->ccb_count--; 4257 } else if (sim == &cam_dead_sim) { 4258 xpt_free_ccb(free_ccb); 4259 } else { 4260 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 4261 xpt_links.sle); 4262 } 4263 if (sim->devq == NULL) { 4264 return; 4265 } 4266 sim->devq->alloc_openings++; 4267 sim->devq->alloc_active--; 4268 /* XXX Turn this into an inline function - xpt_run_device?? */ 4269 if ((device_is_alloc_queued(device) == 0) 4270 && (device->drvq.entries > 0)) { 4271 xpt_schedule_dev_allocq(bus, device); 4272 } 4273 if (dev_allocq_is_runnable(sim->devq)) 4274 xpt_run_dev_allocq(bus); 4275 } 4276 4277 /* Functions accessed by SIM drivers */ 4278 4279 /* 4280 * A sim structure, listing the SIM entry points and instance 4281 * identification info is passed to xpt_bus_register to hook the SIM 4282 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4283 * for this new bus and places it in the array of busses and assigns 4284 * it a path_id. The path_id may be influenced by "hard wiring" 4285 * information specified by the user. Once interrupt services are 4286 * availible, the bus will be probed. 4287 */ 4288 int32_t 4289 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4290 { 4291 struct cam_eb *new_bus; 4292 struct cam_eb *old_bus; 4293 struct ccb_pathinq cpi; 4294 4295 sim_lock_assert_owned(sim->lock); 4296 4297 sim->bus_id = bus; 4298 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); 4299 4300 if (strcmp(sim->sim_name, "xpt") != 0) { 4301 sim->path_id = 4302 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4303 } 4304 4305 TAILQ_INIT(&new_bus->et_entries); 4306 new_bus->path_id = sim->path_id; 4307 new_bus->sim = sim; 4308 ++sim->refcount; 4309 timevalclear(&new_bus->last_reset); 4310 new_bus->flags = 0; 4311 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4312 new_bus->generation = 0; 4313 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4314 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4315 while (old_bus != NULL 4316 && old_bus->path_id < new_bus->path_id) 4317 old_bus = TAILQ_NEXT(old_bus, links); 4318 if (old_bus != NULL) 4319 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4320 else 4321 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4322 xsoftc.bus_generation++; 4323 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4324 4325 /* Notify interested parties */ 4326 if (sim->path_id != CAM_XPT_PATH_ID) { 4327 struct cam_path path; 4328 4329 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4330 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4331 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4332 cpi.ccb_h.func_code = XPT_PATH_INQ; 4333 xpt_action((union ccb *)&cpi); 4334 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4335 xpt_release_path(&path); 4336 } 4337 return (CAM_SUCCESS); 4338 } 4339 4340 /* 4341 * Deregister a bus. We must clean out all transactions pending on the bus. 4342 * This routine is typically called prior to cam_sim_free() (e.g. see 4343 * dev/usbmisc/umass/umass.c) 4344 */ 4345 int32_t 4346 xpt_bus_deregister(path_id_t pathid) 4347 { 4348 struct cam_path bus_path; 4349 struct cam_et *target; 4350 struct cam_ed *device; 4351 struct cam_ed_qinfo *qinfo; 4352 struct cam_devq *devq; 4353 struct cam_periph *periph; 4354 struct cam_sim *ccbsim; 4355 union ccb *work_ccb; 4356 cam_status status; 4357 int retries = 0; 4358 4359 status = xpt_compile_path(&bus_path, NULL, pathid, 4360 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4361 if (status != CAM_REQ_CMP) 4362 return (status); 4363 4364 /* 4365 * This should clear out all pending requests and timeouts, but 4366 * the ccb's may be queued to a software interrupt. 4367 * 4368 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4369 * and it really ought to. 4370 */ 4371 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4372 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4373 4374 /* 4375 * Mark the SIM as having been deregistered. This prevents 4376 * certain operations from re-queueing to it, stops new devices 4377 * from being added, etc. 4378 */ 4379 devq = bus_path.bus->sim->devq; 4380 ccbsim = bus_path.bus->sim; 4381 ccbsim->flags |= CAM_SIM_DEREGISTERED; 4382 4383 again: 4384 /* 4385 * Execute any pending operations now. 4386 */ 4387 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 4388 CAMQ_HEAD)) != NULL || 4389 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 4390 CAMQ_HEAD)) != NULL) { 4391 do { 4392 device = qinfo->device; 4393 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 4394 if (work_ccb != NULL) { 4395 devq->active_dev = device; 4396 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 4397 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 4398 (*(ccbsim->sim_action))(ccbsim, work_ccb); 4399 } 4400 4401 periph = (struct cam_periph *)camq_remove(&device->drvq, 4402 CAMQ_HEAD); 4403 if (periph != NULL) 4404 xpt_schedule(periph, periph->pinfo.priority); 4405 } while (work_ccb != NULL || periph != NULL); 4406 } 4407 4408 /* 4409 * Make sure all completed CCBs are processed. 4410 */ 4411 while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { 4412 camisr_runqueue(ccbsim); 4413 } 4414 4415 /* 4416 * Check for requeues, reissues asyncs if necessary 4417 */ 4418 if (CAMQ_GET_HEAD(&devq->send_queue)) 4419 kprintf("camq: devq send_queue still in use\n"); 4420 if (CAMQ_GET_HEAD(&devq->alloc_queue)) 4421 kprintf("camq: devq alloc_queue still in use\n"); 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 bus_path.bus->sim = &cam_dead_sim; 4439 TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { 4440 TAILQ_FOREACH(device, &target->ed_entries, links) { 4441 device->sim = &cam_dead_sim; 4442 SLIST_FOREACH(periph, &device->periphs, periph_links) { 4443 periph->sim = &cam_dead_sim; 4444 } 4445 } 4446 } 4447 4448 /* 4449 * Repeat the async's for the benefit of any new devices, such as 4450 * might be created from completed probes. Any new device 4451 * ops will run on dead_sim. 4452 * 4453 * XXX There are probably races :-( 4454 */ 4455 CAM_SIM_LOCK(&cam_dead_sim); 4456 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4457 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4458 CAM_SIM_UNLOCK(&cam_dead_sim); 4459 4460 /* Release the reference count held while registered. */ 4461 xpt_release_bus(bus_path.bus); 4462 xpt_release_path(&bus_path); 4463 4464 return (CAM_REQ_CMP); 4465 } 4466 4467 static path_id_t 4468 xptnextfreepathid(void) 4469 { 4470 struct cam_eb *bus; 4471 path_id_t pathid; 4472 char *strval; 4473 4474 pathid = 0; 4475 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4476 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4477 retry: 4478 /* Find an unoccupied pathid */ 4479 while (bus != NULL && bus->path_id <= pathid) { 4480 if (bus->path_id == pathid) 4481 pathid++; 4482 bus = TAILQ_NEXT(bus, links); 4483 } 4484 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4485 4486 /* 4487 * Ensure that this pathid is not reserved for 4488 * a bus that may be registered in the future. 4489 */ 4490 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4491 ++pathid; 4492 /* Start the search over */ 4493 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4494 goto retry; 4495 } 4496 return (pathid); 4497 } 4498 4499 static path_id_t 4500 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4501 { 4502 path_id_t pathid; 4503 int i, dunit, val; 4504 char buf[32]; 4505 4506 pathid = CAM_XPT_PATH_ID; 4507 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4508 i = -1; 4509 while ((i = resource_query_string(i, "at", buf)) != -1) { 4510 if (strcmp(resource_query_name(i), "scbus")) { 4511 /* Avoid a bit of foot shooting. */ 4512 continue; 4513 } 4514 dunit = resource_query_unit(i); 4515 if (dunit < 0) /* unwired?! */ 4516 continue; 4517 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4518 if (sim_bus == val) { 4519 pathid = dunit; 4520 break; 4521 } 4522 } else if (sim_bus == 0) { 4523 /* Unspecified matches bus 0 */ 4524 pathid = dunit; 4525 break; 4526 } else { 4527 kprintf("Ambiguous scbus configuration for %s%d " 4528 "bus %d, cannot wire down. The kernel " 4529 "config entry for scbus%d should " 4530 "specify a controller bus.\n" 4531 "Scbus will be assigned dynamically.\n", 4532 sim_name, sim_unit, sim_bus, dunit); 4533 break; 4534 } 4535 } 4536 4537 if (pathid == CAM_XPT_PATH_ID) 4538 pathid = xptnextfreepathid(); 4539 return (pathid); 4540 } 4541 4542 void 4543 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4544 { 4545 struct cam_eb *bus; 4546 struct cam_et *target, *next_target; 4547 struct cam_ed *device, *next_device; 4548 4549 sim_lock_assert_owned(path->bus->sim->lock); 4550 4551 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4552 4553 /* 4554 * Most async events come from a CAM interrupt context. In 4555 * a few cases, the error recovery code at the peripheral layer, 4556 * which may run from our SWI or a process context, may signal 4557 * deferred events with a call to xpt_async. 4558 */ 4559 4560 bus = path->bus; 4561 4562 if (async_code == AC_BUS_RESET) { 4563 /* Update our notion of when the last reset occurred */ 4564 microuptime(&bus->last_reset); 4565 } 4566 4567 for (target = TAILQ_FIRST(&bus->et_entries); 4568 target != NULL; 4569 target = next_target) { 4570 4571 next_target = TAILQ_NEXT(target, links); 4572 4573 if (path->target != target 4574 && path->target->target_id != CAM_TARGET_WILDCARD 4575 && target->target_id != CAM_TARGET_WILDCARD) 4576 continue; 4577 4578 if (async_code == AC_SENT_BDR) { 4579 /* Update our notion of when the last reset occurred */ 4580 microuptime(&path->target->last_reset); 4581 } 4582 4583 for (device = TAILQ_FIRST(&target->ed_entries); 4584 device != NULL; 4585 device = next_device) { 4586 4587 next_device = TAILQ_NEXT(device, links); 4588 4589 if (path->device != device 4590 && path->device->lun_id != CAM_LUN_WILDCARD 4591 && device->lun_id != CAM_LUN_WILDCARD) 4592 continue; 4593 4594 xpt_dev_async(async_code, bus, target, 4595 device, async_arg); 4596 4597 xpt_async_bcast(&device->asyncs, async_code, 4598 path, async_arg); 4599 } 4600 } 4601 4602 /* 4603 * If this wasn't a fully wildcarded async, tell all 4604 * clients that want all async events. 4605 */ 4606 if (bus != xpt_periph->path->bus) 4607 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4608 path, async_arg); 4609 } 4610 4611 static void 4612 xpt_async_bcast(struct async_list *async_head, 4613 u_int32_t async_code, 4614 struct cam_path *path, void *async_arg) 4615 { 4616 struct async_node *cur_entry; 4617 4618 cur_entry = SLIST_FIRST(async_head); 4619 while (cur_entry != NULL) { 4620 struct async_node *next_entry; 4621 /* 4622 * Grab the next list entry before we call the current 4623 * entry's callback. This is because the callback function 4624 * can delete its async callback entry. 4625 */ 4626 next_entry = SLIST_NEXT(cur_entry, links); 4627 if ((cur_entry->event_enable & async_code) != 0) 4628 cur_entry->callback(cur_entry->callback_arg, 4629 async_code, path, 4630 async_arg); 4631 cur_entry = next_entry; 4632 } 4633 } 4634 4635 /* 4636 * Handle any per-device event notifications that require action by the XPT. 4637 */ 4638 static void 4639 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4640 struct cam_ed *device, void *async_arg) 4641 { 4642 cam_status status; 4643 struct cam_path newpath; 4644 4645 /* 4646 * We only need to handle events for real devices. 4647 */ 4648 if (target->target_id == CAM_TARGET_WILDCARD 4649 || device->lun_id == CAM_LUN_WILDCARD) 4650 return; 4651 4652 /* 4653 * We need our own path with wildcards expanded to 4654 * handle certain types of events. 4655 */ 4656 if ((async_code == AC_SENT_BDR) 4657 || (async_code == AC_BUS_RESET) 4658 || (async_code == AC_INQ_CHANGED)) 4659 status = xpt_compile_path(&newpath, NULL, 4660 bus->path_id, 4661 target->target_id, 4662 device->lun_id); 4663 else 4664 status = CAM_REQ_CMP_ERR; 4665 4666 if (status == CAM_REQ_CMP) { 4667 4668 /* 4669 * Allow transfer negotiation to occur in a 4670 * tag free environment. 4671 */ 4672 if (async_code == AC_SENT_BDR 4673 || async_code == AC_BUS_RESET) 4674 xpt_toggle_tags(&newpath); 4675 4676 if (async_code == AC_INQ_CHANGED) { 4677 /* 4678 * We've sent a start unit command, or 4679 * something similar to a device that 4680 * may have caused its inquiry data to 4681 * change. So we re-scan the device to 4682 * refresh the inquiry data for it. 4683 */ 4684 xpt_scan_lun(newpath.periph, &newpath, 4685 CAM_EXPECT_INQ_CHANGE, NULL); 4686 } 4687 xpt_release_path(&newpath); 4688 } else if (async_code == AC_LOST_DEVICE) { 4689 /* 4690 * When we lose a device the device may be about to detach 4691 * the sim, we have to clear out all pending timeouts and 4692 * requests before that happens. XXX it would be nice if 4693 * we could abort the requests pertaining to the device. 4694 */ 4695 xpt_release_devq_timeout(device); 4696 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4697 device->flags |= CAM_DEV_UNCONFIGURED; 4698 xpt_release_device(bus, target, device); 4699 } 4700 } else if (async_code == AC_TRANSFER_NEG) { 4701 struct ccb_trans_settings *settings; 4702 4703 settings = (struct ccb_trans_settings *)async_arg; 4704 xpt_set_transfer_settings(settings, device, 4705 /*async_update*/TRUE); 4706 } 4707 } 4708 4709 u_int32_t 4710 xpt_freeze_devq(struct cam_path *path, u_int count) 4711 { 4712 struct ccb_hdr *ccbh; 4713 4714 sim_lock_assert_owned(path->bus->sim->lock); 4715 4716 path->device->qfrozen_cnt += count; 4717 4718 /* 4719 * Mark the last CCB in the queue as needing 4720 * to be requeued if the driver hasn't 4721 * changed it's state yet. This fixes a race 4722 * where a ccb is just about to be queued to 4723 * a controller driver when it's interrupt routine 4724 * freezes the queue. To completly close the 4725 * hole, controller drives must check to see 4726 * if a ccb's status is still CAM_REQ_INPROG 4727 * just before they queue 4728 * the CCB. See ahc_action/ahc_freeze_devq for 4729 * an example. 4730 */ 4731 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4732 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4733 ccbh->status = CAM_REQUEUE_REQ; 4734 return (path->device->qfrozen_cnt); 4735 } 4736 4737 u_int32_t 4738 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4739 { 4740 sim_lock_assert_owned(sim->lock); 4741 4742 if (sim->devq == NULL) 4743 return(count); 4744 sim->devq->send_queue.qfrozen_cnt += count; 4745 if (sim->devq->active_dev != NULL) { 4746 struct ccb_hdr *ccbh; 4747 4748 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4749 ccb_hdr_tailq); 4750 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4751 ccbh->status = CAM_REQUEUE_REQ; 4752 } 4753 return (sim->devq->send_queue.qfrozen_cnt); 4754 } 4755 4756 /* 4757 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4758 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4759 * freed, which is not the case here), but the device queue is also freed XXX 4760 * and we have to check that here. 4761 * 4762 * XXX fixme: could we simply not null-out the device queue via 4763 * cam_sim_free()? 4764 */ 4765 static void 4766 xpt_release_devq_timeout(void *arg) 4767 { 4768 struct cam_ed *device; 4769 4770 device = (struct cam_ed *)arg; 4771 4772 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4773 } 4774 4775 void 4776 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4777 { 4778 sim_lock_assert_owned(path->bus->sim->lock); 4779 4780 xpt_release_devq_device(path->device, count, run_queue); 4781 } 4782 4783 static void 4784 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4785 { 4786 int rundevq; 4787 4788 rundevq = 0; 4789 4790 if (dev->qfrozen_cnt > 0) { 4791 4792 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4793 dev->qfrozen_cnt -= count; 4794 if (dev->qfrozen_cnt == 0) { 4795 4796 /* 4797 * No longer need to wait for a successful 4798 * command completion. 4799 */ 4800 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4801 4802 /* 4803 * Remove any timeouts that might be scheduled 4804 * to release this queue. 4805 */ 4806 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4807 callout_stop(&dev->callout); 4808 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4809 } 4810 4811 /* 4812 * Now that we are unfrozen schedule the 4813 * device so any pending transactions are 4814 * run. 4815 */ 4816 if ((dev->ccbq.queue.entries > 0) 4817 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4818 && (run_queue != 0)) { 4819 rundevq = 1; 4820 } 4821 } 4822 } 4823 if (rundevq != 0) 4824 xpt_run_dev_sendq(dev->target->bus); 4825 } 4826 4827 void 4828 xpt_release_simq(struct cam_sim *sim, int run_queue) 4829 { 4830 struct camq *sendq; 4831 4832 sim_lock_assert_owned(sim->lock); 4833 4834 if (sim->devq == NULL) 4835 return; 4836 4837 sendq = &(sim->devq->send_queue); 4838 if (sendq->qfrozen_cnt > 0) { 4839 sendq->qfrozen_cnt--; 4840 if (sendq->qfrozen_cnt == 0) { 4841 struct cam_eb *bus; 4842 4843 /* 4844 * If there is a timeout scheduled to release this 4845 * sim queue, remove it. The queue frozen count is 4846 * already at 0. 4847 */ 4848 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4849 callout_stop(&sim->callout); 4850 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4851 } 4852 bus = xpt_find_bus(sim->path_id); 4853 4854 if (run_queue) { 4855 /* 4856 * Now that we are unfrozen run the send queue. 4857 */ 4858 xpt_run_dev_sendq(bus); 4859 } 4860 xpt_release_bus(bus); 4861 } 4862 } 4863 } 4864 4865 void 4866 xpt_done(union ccb *done_ccb) 4867 { 4868 struct cam_sim *sim; 4869 4870 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4871 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4872 /* 4873 * Queue up the request for handling by our SWI handler 4874 * any of the "non-immediate" type of ccbs. 4875 */ 4876 sim = done_ccb->ccb_h.path->bus->sim; 4877 switch (done_ccb->ccb_h.path->periph->type) { 4878 case CAM_PERIPH_BIO: 4879 spin_lock_wr(&sim->sim_spin); 4880 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4881 sim_links.tqe); 4882 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4883 spin_unlock_wr(&sim->sim_spin); 4884 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4885 spin_lock_wr(&cam_simq_spin); 4886 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4887 TAILQ_INSERT_TAIL(&cam_simq, sim, 4888 links); 4889 sim->flags |= CAM_SIM_ON_DONEQ; 4890 } 4891 spin_unlock_wr(&cam_simq_spin); 4892 } 4893 if ((done_ccb->ccb_h.path->periph->flags & 4894 CAM_PERIPH_POLLED) == 0) 4895 setsoftcambio(); 4896 break; 4897 default: 4898 panic("unknown periph type %d", 4899 done_ccb->ccb_h.path->periph->type); 4900 } 4901 } 4902 } 4903 4904 union ccb * 4905 xpt_alloc_ccb(void) 4906 { 4907 union ccb *new_ccb; 4908 4909 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); 4910 return (new_ccb); 4911 } 4912 4913 void 4914 xpt_free_ccb(union ccb *free_ccb) 4915 { 4916 kfree(free_ccb, M_CAMXPT); 4917 } 4918 4919 4920 4921 /* Private XPT functions */ 4922 4923 /* 4924 * Get a CAM control block for the caller. Charge the structure to the device 4925 * referenced by the path. If the this device has no 'credits' then the 4926 * device already has the maximum number of outstanding operations under way 4927 * and we return NULL. If we don't have sufficient resources to allocate more 4928 * ccbs, we also return NULL. 4929 */ 4930 static union ccb * 4931 xpt_get_ccb(struct cam_ed *device) 4932 { 4933 union ccb *new_ccb; 4934 struct cam_sim *sim; 4935 4936 sim = device->sim; 4937 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4938 new_ccb = xpt_alloc_ccb(); 4939 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4940 callout_init(&new_ccb->ccb_h.timeout_ch); 4941 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4942 xpt_links.sle); 4943 sim->ccb_count++; 4944 } 4945 cam_ccbq_take_opening(&device->ccbq); 4946 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4947 return (new_ccb); 4948 } 4949 4950 static void 4951 xpt_release_bus(struct cam_eb *bus) 4952 { 4953 4954 if ((--bus->refcount == 0) 4955 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4956 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4957 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4958 xsoftc.bus_generation++; 4959 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4960 kfree(bus, M_CAMXPT); 4961 } 4962 } 4963 4964 static struct cam_et * 4965 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4966 { 4967 struct cam_et *target; 4968 struct cam_et *cur_target; 4969 4970 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); 4971 4972 TAILQ_INIT(&target->ed_entries); 4973 target->bus = bus; 4974 target->target_id = target_id; 4975 target->refcount = 1; 4976 target->generation = 0; 4977 timevalclear(&target->last_reset); 4978 /* 4979 * Hold a reference to our parent bus so it 4980 * will not go away before we do. 4981 */ 4982 bus->refcount++; 4983 4984 /* Insertion sort into our bus's target list */ 4985 cur_target = TAILQ_FIRST(&bus->et_entries); 4986 while (cur_target != NULL && cur_target->target_id < target_id) 4987 cur_target = TAILQ_NEXT(cur_target, links); 4988 4989 if (cur_target != NULL) { 4990 TAILQ_INSERT_BEFORE(cur_target, target, links); 4991 } else { 4992 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4993 } 4994 bus->generation++; 4995 return (target); 4996 } 4997 4998 static void 4999 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 5000 { 5001 if (target->refcount == 1) { 5002 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 5003 TAILQ_REMOVE(&bus->et_entries, target, links); 5004 bus->generation++; 5005 xpt_release_bus(bus); 5006 KKASSERT(target->refcount == 1); 5007 kfree(target, M_CAMXPT); 5008 } else { 5009 --target->refcount; 5010 } 5011 } 5012 5013 static struct cam_ed * 5014 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 5015 { 5016 struct cam_path path; 5017 struct cam_ed *device; 5018 struct cam_devq *devq; 5019 cam_status status; 5020 5021 /* 5022 * Disallow new devices while trying to deregister a sim 5023 */ 5024 if (bus->sim->flags & CAM_SIM_DEREGISTERED) 5025 return (NULL); 5026 5027 /* 5028 * Make space for us in the device queue on our bus 5029 */ 5030 devq = bus->sim->devq; 5031 if (devq == NULL) 5032 return(NULL); 5033 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 5034 5035 if (status != CAM_REQ_CMP) { 5036 device = NULL; 5037 } else { 5038 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); 5039 } 5040 5041 if (device != NULL) { 5042 struct cam_ed *cur_device; 5043 5044 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 5045 device->alloc_ccb_entry.device = device; 5046 cam_init_pinfo(&device->send_ccb_entry.pinfo); 5047 device->send_ccb_entry.device = device; 5048 device->target = target; 5049 device->lun_id = lun_id; 5050 device->sim = bus->sim; 5051 /* Initialize our queues */ 5052 if (camq_init(&device->drvq, 0) != 0) { 5053 kfree(device, M_CAMXPT); 5054 return (NULL); 5055 } 5056 if (cam_ccbq_init(&device->ccbq, 5057 bus->sim->max_dev_openings) != 0) { 5058 camq_fini(&device->drvq); 5059 kfree(device, M_CAMXPT); 5060 return (NULL); 5061 } 5062 SLIST_INIT(&device->asyncs); 5063 SLIST_INIT(&device->periphs); 5064 device->generation = 0; 5065 device->owner = NULL; 5066 /* 5067 * Take the default quirk entry until we have inquiry 5068 * data and can determine a better quirk to use. 5069 */ 5070 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 5071 bzero(&device->inq_data, sizeof(device->inq_data)); 5072 device->inq_flags = 0; 5073 device->queue_flags = 0; 5074 device->serial_num = NULL; 5075 device->serial_num_len = 0; 5076 device->qfrozen_cnt = 0; 5077 device->flags = CAM_DEV_UNCONFIGURED; 5078 device->tag_delay_count = 0; 5079 device->tag_saved_openings = 0; 5080 device->refcount = 1; 5081 callout_init(&device->callout); 5082 5083 /* 5084 * Hold a reference to our parent target so it 5085 * will not go away before we do. 5086 */ 5087 target->refcount++; 5088 5089 /* 5090 * XXX should be limited by number of CCBs this bus can 5091 * do. 5092 */ 5093 bus->sim->max_ccbs += device->ccbq.devq_openings; 5094 /* Insertion sort into our target's device list */ 5095 cur_device = TAILQ_FIRST(&target->ed_entries); 5096 while (cur_device != NULL && cur_device->lun_id < lun_id) 5097 cur_device = TAILQ_NEXT(cur_device, links); 5098 if (cur_device != NULL) { 5099 TAILQ_INSERT_BEFORE(cur_device, device, links); 5100 } else { 5101 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 5102 } 5103 target->generation++; 5104 if (lun_id != CAM_LUN_WILDCARD) { 5105 xpt_compile_path(&path, 5106 NULL, 5107 bus->path_id, 5108 target->target_id, 5109 lun_id); 5110 xpt_devise_transport(&path); 5111 xpt_release_path(&path); 5112 } 5113 } 5114 return (device); 5115 } 5116 5117 static void 5118 xpt_reference_device(struct cam_ed *device) 5119 { 5120 ++device->refcount; 5121 } 5122 5123 static void 5124 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 5125 struct cam_ed *device) 5126 { 5127 struct cam_devq *devq; 5128 5129 if (device->refcount == 1) { 5130 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 5131 5132 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 5133 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 5134 panic("Removing device while still queued for ccbs"); 5135 5136 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 5137 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 5138 callout_stop(&device->callout); 5139 } 5140 5141 TAILQ_REMOVE(&target->ed_entries, device,links); 5142 target->generation++; 5143 bus->sim->max_ccbs -= device->ccbq.devq_openings; 5144 if ((devq = bus->sim->devq) != NULL) { 5145 /* Release our slot in the devq */ 5146 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 5147 } 5148 camq_fini(&device->drvq); 5149 camq_fini(&device->ccbq.queue); 5150 xpt_release_target(bus, target); 5151 KKASSERT(device->refcount == 1); 5152 kfree(device, M_CAMXPT); 5153 } else { 5154 --device->refcount; 5155 } 5156 } 5157 5158 static u_int32_t 5159 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5160 { 5161 int diff; 5162 int result; 5163 struct cam_ed *dev; 5164 5165 dev = path->device; 5166 5167 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 5168 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5169 if (result == CAM_REQ_CMP && (diff < 0)) { 5170 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 5171 } 5172 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5173 || (dev->inq_flags & SID_CmdQue) != 0) 5174 dev->tag_saved_openings = newopenings; 5175 /* Adjust the global limit */ 5176 dev->sim->max_ccbs += diff; 5177 return (result); 5178 } 5179 5180 static struct cam_eb * 5181 xpt_find_bus(path_id_t path_id) 5182 { 5183 struct cam_eb *bus; 5184 5185 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5186 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 5187 if (bus->path_id == path_id) { 5188 bus->refcount++; 5189 break; 5190 } 5191 } 5192 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5193 return (bus); 5194 } 5195 5196 static struct cam_et * 5197 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5198 { 5199 struct cam_et *target; 5200 5201 TAILQ_FOREACH(target, &bus->et_entries, links) { 5202 if (target->target_id == target_id) { 5203 target->refcount++; 5204 break; 5205 } 5206 } 5207 return (target); 5208 } 5209 5210 static struct cam_ed * 5211 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5212 { 5213 struct cam_ed *device; 5214 5215 TAILQ_FOREACH(device, &target->ed_entries, links) { 5216 if (device->lun_id == lun_id) { 5217 device->refcount++; 5218 break; 5219 } 5220 } 5221 return (device); 5222 } 5223 5224 typedef struct { 5225 union ccb *request_ccb; 5226 struct ccb_pathinq *cpi; 5227 int counter; 5228 } xpt_scan_bus_info; 5229 5230 /* 5231 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5232 * As the scan progresses, xpt_scan_bus is used as the 5233 * callback on completion function. 5234 */ 5235 static void 5236 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5237 { 5238 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5239 ("xpt_scan_bus\n")); 5240 switch (request_ccb->ccb_h.func_code) { 5241 case XPT_SCAN_BUS: 5242 { 5243 xpt_scan_bus_info *scan_info; 5244 union ccb *work_ccb; 5245 struct cam_path *path; 5246 u_int i; 5247 u_int max_target; 5248 u_int initiator_id; 5249 5250 /* Find out the characteristics of the bus */ 5251 work_ccb = xpt_alloc_ccb(); 5252 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5253 request_ccb->ccb_h.pinfo.priority); 5254 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5255 xpt_action(work_ccb); 5256 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5257 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5258 xpt_free_ccb(work_ccb); 5259 xpt_done(request_ccb); 5260 return; 5261 } 5262 5263 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5264 /* 5265 * Can't scan the bus on an adapter that 5266 * cannot perform the initiator role. 5267 */ 5268 request_ccb->ccb_h.status = CAM_REQ_CMP; 5269 xpt_free_ccb(work_ccb); 5270 xpt_done(request_ccb); 5271 return; 5272 } 5273 5274 /* Save some state for use while we probe for devices */ 5275 scan_info = (xpt_scan_bus_info *) 5276 kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); 5277 scan_info->request_ccb = request_ccb; 5278 scan_info->cpi = &work_ccb->cpi; 5279 5280 /* Cache on our stack so we can work asynchronously */ 5281 max_target = scan_info->cpi->max_target; 5282 initiator_id = scan_info->cpi->initiator_id; 5283 5284 5285 /* 5286 * We can scan all targets in parallel, or do it sequentially. 5287 */ 5288 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5289 max_target = 0; 5290 scan_info->counter = 0; 5291 } else { 5292 scan_info->counter = scan_info->cpi->max_target + 1; 5293 if (scan_info->cpi->initiator_id < scan_info->counter) { 5294 scan_info->counter--; 5295 } 5296 } 5297 5298 for (i = 0; i <= max_target; i++) { 5299 cam_status status; 5300 if (i == initiator_id) 5301 continue; 5302 5303 status = xpt_create_path(&path, xpt_periph, 5304 request_ccb->ccb_h.path_id, 5305 i, 0); 5306 if (status != CAM_REQ_CMP) { 5307 kprintf("xpt_scan_bus: xpt_create_path failed" 5308 " with status %#x, bus scan halted\n", 5309 status); 5310 kfree(scan_info, M_CAMXPT); 5311 request_ccb->ccb_h.status = status; 5312 xpt_free_ccb(work_ccb); 5313 xpt_done(request_ccb); 5314 break; 5315 } 5316 work_ccb = xpt_alloc_ccb(); 5317 xpt_setup_ccb(&work_ccb->ccb_h, path, 5318 request_ccb->ccb_h.pinfo.priority); 5319 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5320 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5321 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5322 work_ccb->crcn.flags = request_ccb->crcn.flags; 5323 xpt_action(work_ccb); 5324 } 5325 break; 5326 } 5327 case XPT_SCAN_LUN: 5328 { 5329 cam_status status; 5330 struct cam_path *path; 5331 xpt_scan_bus_info *scan_info; 5332 path_id_t path_id; 5333 target_id_t target_id; 5334 lun_id_t lun_id; 5335 5336 /* Reuse the same CCB to query if a device was really found */ 5337 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5338 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5339 request_ccb->ccb_h.pinfo.priority); 5340 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5341 5342 path_id = request_ccb->ccb_h.path_id; 5343 target_id = request_ccb->ccb_h.target_id; 5344 lun_id = request_ccb->ccb_h.target_lun; 5345 xpt_action(request_ccb); 5346 5347 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5348 struct cam_ed *device; 5349 struct cam_et *target; 5350 int phl; 5351 5352 /* 5353 * If we already probed lun 0 successfully, or 5354 * we have additional configured luns on this 5355 * target that might have "gone away", go onto 5356 * the next lun. 5357 */ 5358 target = request_ccb->ccb_h.path->target; 5359 /* 5360 * We may touch devices that we don't 5361 * hold references too, so ensure they 5362 * don't disappear out from under us. 5363 * The target above is referenced by the 5364 * path in the request ccb. 5365 */ 5366 phl = 0; 5367 device = TAILQ_FIRST(&target->ed_entries); 5368 if (device != NULL) { 5369 phl = CAN_SRCH_HI_SPARSE(device); 5370 if (device->lun_id == 0) 5371 device = TAILQ_NEXT(device, links); 5372 } 5373 if ((lun_id != 0) || (device != NULL)) { 5374 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5375 lun_id++; 5376 } 5377 } else { 5378 struct cam_ed *device; 5379 5380 device = request_ccb->ccb_h.path->device; 5381 5382 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5383 /* Try the next lun */ 5384 if (lun_id < (CAM_SCSI2_MAXLUN-1) 5385 || CAN_SRCH_HI_DENSE(device)) 5386 lun_id++; 5387 } 5388 } 5389 5390 /* 5391 * Free the current request path- we're done with it. 5392 */ 5393 xpt_free_path(request_ccb->ccb_h.path); 5394 5395 /* 5396 * Check to see if we scan any further luns. 5397 */ 5398 if (lun_id == request_ccb->ccb_h.target_lun 5399 || lun_id > scan_info->cpi->max_lun) { 5400 int done; 5401 5402 hop_again: 5403 done = 0; 5404 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5405 scan_info->counter++; 5406 if (scan_info->counter == 5407 scan_info->cpi->initiator_id) { 5408 scan_info->counter++; 5409 } 5410 if (scan_info->counter >= 5411 scan_info->cpi->max_target+1) { 5412 done = 1; 5413 } 5414 } else { 5415 scan_info->counter--; 5416 if (scan_info->counter == 0) { 5417 done = 1; 5418 } 5419 } 5420 if (done) { 5421 xpt_free_ccb(request_ccb); 5422 xpt_free_ccb((union ccb *)scan_info->cpi); 5423 request_ccb = scan_info->request_ccb; 5424 kfree(scan_info, M_CAMXPT); 5425 request_ccb->ccb_h.status = CAM_REQ_CMP; 5426 xpt_done(request_ccb); 5427 break; 5428 } 5429 5430 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { 5431 break; 5432 } 5433 status = xpt_create_path(&path, xpt_periph, 5434 scan_info->request_ccb->ccb_h.path_id, 5435 scan_info->counter, 0); 5436 if (status != CAM_REQ_CMP) { 5437 kprintf("xpt_scan_bus: xpt_create_path failed" 5438 " with status %#x, bus scan halted\n", 5439 status); 5440 xpt_free_ccb(request_ccb); 5441 xpt_free_ccb((union ccb *)scan_info->cpi); 5442 request_ccb = scan_info->request_ccb; 5443 kfree(scan_info, M_CAMXPT); 5444 request_ccb->ccb_h.status = status; 5445 xpt_done(request_ccb); 5446 break; 5447 } 5448 xpt_setup_ccb(&request_ccb->ccb_h, path, 5449 request_ccb->ccb_h.pinfo.priority); 5450 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5451 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5452 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5453 request_ccb->crcn.flags = 5454 scan_info->request_ccb->crcn.flags; 5455 } else { 5456 status = xpt_create_path(&path, xpt_periph, 5457 path_id, target_id, lun_id); 5458 if (status != CAM_REQ_CMP) { 5459 kprintf("xpt_scan_bus: xpt_create_path failed " 5460 "with status %#x, halting LUN scan\n", 5461 status); 5462 goto hop_again; 5463 } 5464 xpt_setup_ccb(&request_ccb->ccb_h, path, 5465 request_ccb->ccb_h.pinfo.priority); 5466 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5467 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5468 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5469 request_ccb->crcn.flags = 5470 scan_info->request_ccb->crcn.flags; 5471 } 5472 xpt_action(request_ccb); 5473 break; 5474 } 5475 default: 5476 break; 5477 } 5478 } 5479 5480 typedef enum { 5481 PROBE_TUR, 5482 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ 5483 PROBE_FULL_INQUIRY, 5484 PROBE_MODE_SENSE, 5485 PROBE_SERIAL_NUM_0, 5486 PROBE_SERIAL_NUM_1, 5487 PROBE_TUR_FOR_NEGOTIATION, 5488 PROBE_INQUIRY_BASIC_DV1, 5489 PROBE_INQUIRY_BASIC_DV2, 5490 PROBE_DV_EXIT 5491 } probe_action; 5492 5493 typedef enum { 5494 PROBE_INQUIRY_CKSUM = 0x01, 5495 PROBE_SERIAL_CKSUM = 0x02, 5496 PROBE_NO_ANNOUNCE = 0x04 5497 } probe_flags; 5498 5499 typedef struct { 5500 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5501 probe_action action; 5502 union ccb saved_ccb; 5503 probe_flags flags; 5504 MD5_CTX context; 5505 u_int8_t digest[16]; 5506 } probe_softc; 5507 5508 static void 5509 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5510 cam_flags flags, union ccb *request_ccb) 5511 { 5512 struct ccb_pathinq cpi; 5513 cam_status status; 5514 struct cam_path *new_path; 5515 struct cam_periph *old_periph; 5516 5517 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5518 ("xpt_scan_lun\n")); 5519 5520 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5521 cpi.ccb_h.func_code = XPT_PATH_INQ; 5522 xpt_action((union ccb *)&cpi); 5523 5524 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5525 if (request_ccb != NULL) { 5526 request_ccb->ccb_h.status = cpi.ccb_h.status; 5527 xpt_done(request_ccb); 5528 } 5529 return; 5530 } 5531 5532 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5533 /* 5534 * Can't scan the bus on an adapter that 5535 * cannot perform the initiator role. 5536 */ 5537 if (request_ccb != NULL) { 5538 request_ccb->ccb_h.status = CAM_REQ_CMP; 5539 xpt_done(request_ccb); 5540 } 5541 return; 5542 } 5543 5544 if (request_ccb == NULL) { 5545 request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); 5546 new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); 5547 status = xpt_compile_path(new_path, xpt_periph, 5548 path->bus->path_id, 5549 path->target->target_id, 5550 path->device->lun_id); 5551 5552 if (status != CAM_REQ_CMP) { 5553 xpt_print(path, "xpt_scan_lun: can't compile path, " 5554 "can't continue\n"); 5555 kfree(request_ccb, M_CAMXPT); 5556 kfree(new_path, M_CAMXPT); 5557 return; 5558 } 5559 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5560 request_ccb->ccb_h.cbfcnp = xptscandone; 5561 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5562 request_ccb->crcn.flags = flags; 5563 } 5564 5565 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5566 probe_softc *softc; 5567 5568 softc = (probe_softc *)old_periph->softc; 5569 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5570 periph_links.tqe); 5571 } else { 5572 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5573 probestart, "probe", 5574 CAM_PERIPH_BIO, 5575 request_ccb->ccb_h.path, NULL, 0, 5576 request_ccb); 5577 5578 if (status != CAM_REQ_CMP) { 5579 xpt_print(path, "xpt_scan_lun: cam_alloc_periph " 5580 "returned an error, can't continue probe\n"); 5581 request_ccb->ccb_h.status = status; 5582 xpt_done(request_ccb); 5583 } 5584 } 5585 } 5586 5587 static void 5588 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5589 { 5590 xpt_release_path(done_ccb->ccb_h.path); 5591 kfree(done_ccb->ccb_h.path, M_CAMXPT); 5592 kfree(done_ccb, M_CAMXPT); 5593 } 5594 5595 static cam_status 5596 proberegister(struct cam_periph *periph, void *arg) 5597 { 5598 union ccb *request_ccb; /* CCB representing the probe request */ 5599 cam_status status; 5600 probe_softc *softc; 5601 5602 request_ccb = (union ccb *)arg; 5603 if (periph == NULL) { 5604 kprintf("proberegister: periph was NULL!!\n"); 5605 return(CAM_REQ_CMP_ERR); 5606 } 5607 5608 if (request_ccb == NULL) { 5609 kprintf("proberegister: no probe CCB, " 5610 "can't register device\n"); 5611 return(CAM_REQ_CMP_ERR); 5612 } 5613 5614 softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); 5615 TAILQ_INIT(&softc->request_ccbs); 5616 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5617 periph_links.tqe); 5618 softc->flags = 0; 5619 periph->softc = softc; 5620 status = cam_periph_acquire(periph); 5621 if (status != CAM_REQ_CMP) { 5622 return (status); 5623 } 5624 5625 5626 /* 5627 * Ensure we've waited at least a bus settle 5628 * delay before attempting to probe the device. 5629 * For HBAs that don't do bus resets, this won't make a difference. 5630 */ 5631 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5632 scsi_delay); 5633 probeschedule(periph); 5634 return(CAM_REQ_CMP); 5635 } 5636 5637 static void 5638 probeschedule(struct cam_periph *periph) 5639 { 5640 struct ccb_pathinq cpi; 5641 union ccb *ccb; 5642 probe_softc *softc; 5643 5644 softc = (probe_softc *)periph->softc; 5645 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5646 5647 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5648 cpi.ccb_h.func_code = XPT_PATH_INQ; 5649 xpt_action((union ccb *)&cpi); 5650 5651 /* 5652 * If a device has gone away and another device, or the same one, 5653 * is back in the same place, it should have a unit attention 5654 * condition pending. It will not report the unit attention in 5655 * response to an inquiry, which may leave invalid transfer 5656 * negotiations in effect. The TUR will reveal the unit attention 5657 * condition. Only send the TUR for lun 0, since some devices 5658 * will get confused by commands other than inquiry to non-existent 5659 * luns. If you think a device has gone away start your scan from 5660 * lun 0. This will insure that any bogus transfer settings are 5661 * invalidated. 5662 * 5663 * If we haven't seen the device before and the controller supports 5664 * some kind of transfer negotiation, negotiate with the first 5665 * sent command if no bus reset was performed at startup. This 5666 * ensures that the device is not confused by transfer negotiation 5667 * settings left over by loader or BIOS action. 5668 */ 5669 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5670 && (ccb->ccb_h.target_lun == 0)) { 5671 softc->action = PROBE_TUR; 5672 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5673 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5674 proberequestdefaultnegotiation(periph); 5675 softc->action = PROBE_INQUIRY; 5676 } else { 5677 softc->action = PROBE_INQUIRY; 5678 } 5679 5680 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5681 softc->flags |= PROBE_NO_ANNOUNCE; 5682 else 5683 softc->flags &= ~PROBE_NO_ANNOUNCE; 5684 5685 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5686 } 5687 5688 static void 5689 probestart(struct cam_periph *periph, union ccb *start_ccb) 5690 { 5691 /* Probe the device that our peripheral driver points to */ 5692 struct ccb_scsiio *csio; 5693 probe_softc *softc; 5694 5695 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5696 5697 softc = (probe_softc *)periph->softc; 5698 csio = &start_ccb->csio; 5699 5700 switch (softc->action) { 5701 case PROBE_TUR: 5702 case PROBE_TUR_FOR_NEGOTIATION: 5703 case PROBE_DV_EXIT: 5704 { 5705 scsi_test_unit_ready(csio, 5706 /*retries*/4, 5707 probedone, 5708 MSG_SIMPLE_Q_TAG, 5709 SSD_FULL_SIZE, 5710 /*timeout*/60000); 5711 break; 5712 } 5713 case PROBE_INQUIRY: 5714 case PROBE_FULL_INQUIRY: 5715 case PROBE_INQUIRY_BASIC_DV1: 5716 case PROBE_INQUIRY_BASIC_DV2: 5717 { 5718 u_int inquiry_len; 5719 struct scsi_inquiry_data *inq_buf; 5720 5721 inq_buf = &periph->path->device->inq_data; 5722 5723 /* 5724 * If the device is currently configured, we calculate an 5725 * MD5 checksum of the inquiry data, and if the serial number 5726 * length is greater than 0, add the serial number data 5727 * into the checksum as well. Once the inquiry and the 5728 * serial number check finish, we attempt to figure out 5729 * whether we still have the same device. 5730 */ 5731 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5732 5733 MD5Init(&softc->context); 5734 MD5Update(&softc->context, (unsigned char *)inq_buf, 5735 sizeof(struct scsi_inquiry_data)); 5736 softc->flags |= PROBE_INQUIRY_CKSUM; 5737 if (periph->path->device->serial_num_len > 0) { 5738 MD5Update(&softc->context, 5739 periph->path->device->serial_num, 5740 periph->path->device->serial_num_len); 5741 softc->flags |= PROBE_SERIAL_CKSUM; 5742 } 5743 MD5Final(softc->digest, &softc->context); 5744 } 5745 5746 if (softc->action == PROBE_INQUIRY) 5747 inquiry_len = SHORT_INQUIRY_LENGTH; 5748 else 5749 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); 5750 5751 /* 5752 * Some parallel SCSI devices fail to send an 5753 * ignore wide residue message when dealing with 5754 * odd length inquiry requests. Round up to be 5755 * safe. 5756 */ 5757 inquiry_len = roundup2(inquiry_len, 2); 5758 5759 if (softc->action == PROBE_INQUIRY_BASIC_DV1 5760 || softc->action == PROBE_INQUIRY_BASIC_DV2) { 5761 inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); 5762 } 5763 scsi_inquiry(csio, 5764 /*retries*/4, 5765 probedone, 5766 MSG_SIMPLE_Q_TAG, 5767 (u_int8_t *)inq_buf, 5768 inquiry_len, 5769 /*evpd*/FALSE, 5770 /*page_code*/0, 5771 SSD_MIN_SIZE, 5772 /*timeout*/60 * 1000); 5773 break; 5774 } 5775 case PROBE_MODE_SENSE: 5776 { 5777 void *mode_buf; 5778 int mode_buf_len; 5779 5780 mode_buf_len = sizeof(struct scsi_mode_header_6) 5781 + sizeof(struct scsi_mode_blk_desc) 5782 + sizeof(struct scsi_control_page); 5783 mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); 5784 scsi_mode_sense(csio, 5785 /*retries*/4, 5786 probedone, 5787 MSG_SIMPLE_Q_TAG, 5788 /*dbd*/FALSE, 5789 SMS_PAGE_CTRL_CURRENT, 5790 SMS_CONTROL_MODE_PAGE, 5791 mode_buf, 5792 mode_buf_len, 5793 SSD_FULL_SIZE, 5794 /*timeout*/60000); 5795 break; 5796 } 5797 case PROBE_SERIAL_NUM_0: 5798 { 5799 struct scsi_vpd_supported_page_list *vpd_list = NULL; 5800 struct cam_ed *device; 5801 5802 device = periph->path->device; 5803 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5804 vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, 5805 M_INTWAIT | M_ZERO); 5806 } 5807 5808 if (vpd_list != NULL) { 5809 scsi_inquiry(csio, 5810 /*retries*/4, 5811 probedone, 5812 MSG_SIMPLE_Q_TAG, 5813 (u_int8_t *)vpd_list, 5814 sizeof(*vpd_list), 5815 /*evpd*/TRUE, 5816 SVPD_SUPPORTED_PAGE_LIST, 5817 SSD_MIN_SIZE, 5818 /*timeout*/60 * 1000); 5819 break; 5820 } 5821 /* 5822 * We'll have to do without, let our probedone 5823 * routine finish up for us. 5824 */ 5825 start_ccb->csio.data_ptr = NULL; 5826 probedone(periph, start_ccb); 5827 return; 5828 } 5829 case PROBE_SERIAL_NUM_1: 5830 { 5831 struct scsi_vpd_unit_serial_number *serial_buf; 5832 struct cam_ed* device; 5833 5834 serial_buf = NULL; 5835 device = periph->path->device; 5836 device->serial_num = NULL; 5837 device->serial_num_len = 0; 5838 5839 serial_buf = (struct scsi_vpd_unit_serial_number *) 5840 kmalloc(sizeof(*serial_buf), M_CAMXPT, 5841 M_INTWAIT | M_ZERO); 5842 scsi_inquiry(csio, 5843 /*retries*/4, 5844 probedone, 5845 MSG_SIMPLE_Q_TAG, 5846 (u_int8_t *)serial_buf, 5847 sizeof(*serial_buf), 5848 /*evpd*/TRUE, 5849 SVPD_UNIT_SERIAL_NUMBER, 5850 SSD_MIN_SIZE, 5851 /*timeout*/60 * 1000); 5852 break; 5853 } 5854 } 5855 xpt_action(start_ccb); 5856 } 5857 5858 static void 5859 proberequestdefaultnegotiation(struct cam_periph *periph) 5860 { 5861 struct ccb_trans_settings cts; 5862 5863 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5864 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5865 cts.type = CTS_TYPE_USER_SETTINGS; 5866 xpt_action((union ccb *)&cts); 5867 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5868 return; 5869 } 5870 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5871 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5872 xpt_action((union ccb *)&cts); 5873 } 5874 5875 /* 5876 * Backoff Negotiation Code- only pertinent for SPI devices. 5877 */ 5878 static int 5879 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) 5880 { 5881 struct ccb_trans_settings cts; 5882 struct ccb_trans_settings_spi *spi; 5883 5884 memset(&cts, 0, sizeof (cts)); 5885 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5886 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5887 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5888 xpt_action((union ccb *)&cts); 5889 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5890 if (bootverbose) { 5891 xpt_print(periph->path, 5892 "failed to get current device settings\n"); 5893 } 5894 return (0); 5895 } 5896 if (cts.transport != XPORT_SPI) { 5897 if (bootverbose) { 5898 xpt_print(periph->path, "not SPI transport\n"); 5899 } 5900 return (0); 5901 } 5902 spi = &cts.xport_specific.spi; 5903 5904 /* 5905 * We cannot renegotiate sync rate if we don't have one. 5906 */ 5907 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { 5908 if (bootverbose) { 5909 xpt_print(periph->path, "no sync rate known\n"); 5910 } 5911 return (0); 5912 } 5913 5914 /* 5915 * We'll assert that we don't have to touch PPR options- the 5916 * SIM will see what we do with period and offset and adjust 5917 * the PPR options as appropriate. 5918 */ 5919 5920 /* 5921 * A sync rate with unknown or zero offset is nonsensical. 5922 * A sync period of zero means Async. 5923 */ 5924 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 5925 || spi->sync_offset == 0 || spi->sync_period == 0) { 5926 if (bootverbose) { 5927 xpt_print(periph->path, "no sync rate available\n"); 5928 } 5929 return (0); 5930 } 5931 5932 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { 5933 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5934 ("hit async: giving up on DV\n")); 5935 return (0); 5936 } 5937 5938 5939 /* 5940 * Jump sync_period up by one, but stop at 5MHz and fall back to Async. 5941 * We don't try to remember 'last' settings to see if the SIM actually 5942 * gets into the speed we want to set. We check on the SIM telling 5943 * us that a requested speed is bad, but otherwise don't try and 5944 * check the speed due to the asynchronous and handshake nature 5945 * of speed setting. 5946 */ 5947 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; 5948 for (;;) { 5949 spi->sync_period++; 5950 if (spi->sync_period >= 0xf) { 5951 spi->sync_period = 0; 5952 spi->sync_offset = 0; 5953 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5954 ("setting to async for DV\n")); 5955 /* 5956 * Once we hit async, we don't want to try 5957 * any more settings. 5958 */ 5959 device->flags |= CAM_DEV_DV_HIT_BOTTOM; 5960 } else if (bootverbose) { 5961 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5962 ("DV: period 0x%x\n", spi->sync_period)); 5963 kprintf("setting period to 0x%x\n", spi->sync_period); 5964 } 5965 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5966 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5967 xpt_action((union ccb *)&cts); 5968 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5969 break; 5970 } 5971 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5972 ("DV: failed to set period 0x%x\n", spi->sync_period)); 5973 if (spi->sync_period == 0) { 5974 return (0); 5975 } 5976 } 5977 return (1); 5978 } 5979 5980 static void 5981 probedone(struct cam_periph *periph, union ccb *done_ccb) 5982 { 5983 probe_softc *softc; 5984 struct cam_path *path; 5985 u_int32_t priority; 5986 5987 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5988 5989 softc = (probe_softc *)periph->softc; 5990 path = done_ccb->ccb_h.path; 5991 priority = done_ccb->ccb_h.pinfo.priority; 5992 5993 switch (softc->action) { 5994 case PROBE_TUR: 5995 { 5996 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5997 5998 if (cam_periph_error(done_ccb, 0, 5999 SF_NO_PRINT, NULL) == ERESTART) 6000 return; 6001 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 6002 /* Don't wedge the queue */ 6003 xpt_release_devq(done_ccb->ccb_h.path, 6004 /*count*/1, 6005 /*run_queue*/TRUE); 6006 } 6007 softc->action = PROBE_INQUIRY; 6008 xpt_release_ccb(done_ccb); 6009 xpt_schedule(periph, priority); 6010 return; 6011 } 6012 case PROBE_INQUIRY: 6013 case PROBE_FULL_INQUIRY: 6014 { 6015 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6016 struct scsi_inquiry_data *inq_buf; 6017 u_int8_t periph_qual; 6018 6019 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 6020 inq_buf = &path->device->inq_data; 6021 6022 periph_qual = SID_QUAL(inq_buf); 6023 6024 switch(periph_qual) { 6025 case SID_QUAL_LU_CONNECTED: 6026 { 6027 u_int8_t len; 6028 6029 /* 6030 * We conservatively request only 6031 * SHORT_INQUIRY_LEN bytes of inquiry 6032 * information during our first try 6033 * at sending an INQUIRY. If the device 6034 * has more information to give, 6035 * perform a second request specifying 6036 * the amount of information the device 6037 * is willing to give. 6038 */ 6039 len = inq_buf->additional_length 6040 + offsetof(struct scsi_inquiry_data, 6041 additional_length) + 1; 6042 if (softc->action == PROBE_INQUIRY 6043 && len > SHORT_INQUIRY_LENGTH) { 6044 softc->action = PROBE_FULL_INQUIRY; 6045 xpt_release_ccb(done_ccb); 6046 xpt_schedule(periph, priority); 6047 return; 6048 } 6049 6050 xpt_find_quirk(path->device); 6051 6052 xpt_devise_transport(path); 6053 if (INQ_DATA_TQ_ENABLED(inq_buf)) 6054 softc->action = PROBE_MODE_SENSE; 6055 else 6056 softc->action = PROBE_SERIAL_NUM_0; 6057 6058 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 6059 xpt_reference_device(path->device); 6060 6061 xpt_release_ccb(done_ccb); 6062 xpt_schedule(periph, priority); 6063 return; 6064 } 6065 default: 6066 break; 6067 } 6068 } else if (cam_periph_error(done_ccb, 0, 6069 done_ccb->ccb_h.target_lun > 0 6070 ? SF_RETRY_UA|SF_QUIET_IR 6071 : SF_RETRY_UA, 6072 &softc->saved_ccb) == ERESTART) { 6073 return; 6074 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6075 /* Don't wedge the queue */ 6076 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6077 /*run_queue*/TRUE); 6078 } 6079 /* 6080 * If we get to this point, we got an error status back 6081 * from the inquiry and the error status doesn't require 6082 * automatically retrying the command. Therefore, the 6083 * inquiry failed. If we had inquiry information before 6084 * for this device, but this latest inquiry command failed, 6085 * the device has probably gone away. If this device isn't 6086 * already marked unconfigured, notify the peripheral 6087 * drivers that this device is no more. 6088 */ 6089 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 6090 /* Send the async notification. */ 6091 xpt_async(AC_LOST_DEVICE, path, NULL); 6092 } 6093 6094 xpt_release_ccb(done_ccb); 6095 break; 6096 } 6097 case PROBE_MODE_SENSE: 6098 { 6099 struct ccb_scsiio *csio; 6100 struct scsi_mode_header_6 *mode_hdr; 6101 6102 csio = &done_ccb->csio; 6103 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 6104 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6105 struct scsi_control_page *page; 6106 u_int8_t *offset; 6107 6108 offset = ((u_int8_t *)&mode_hdr[1]) 6109 + mode_hdr->blk_desc_len; 6110 page = (struct scsi_control_page *)offset; 6111 path->device->queue_flags = page->queue_flags; 6112 } else if (cam_periph_error(done_ccb, 0, 6113 SF_RETRY_UA|SF_NO_PRINT, 6114 &softc->saved_ccb) == ERESTART) { 6115 return; 6116 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6117 /* Don't wedge the queue */ 6118 xpt_release_devq(done_ccb->ccb_h.path, 6119 /*count*/1, /*run_queue*/TRUE); 6120 } 6121 xpt_release_ccb(done_ccb); 6122 kfree(mode_hdr, M_CAMXPT); 6123 softc->action = PROBE_SERIAL_NUM_0; 6124 xpt_schedule(periph, priority); 6125 return; 6126 } 6127 case PROBE_SERIAL_NUM_0: 6128 { 6129 struct ccb_scsiio *csio; 6130 struct scsi_vpd_supported_page_list *page_list; 6131 int length, serialnum_supported, i; 6132 6133 serialnum_supported = 0; 6134 csio = &done_ccb->csio; 6135 page_list = 6136 (struct scsi_vpd_supported_page_list *)csio->data_ptr; 6137 6138 if (page_list == NULL) { 6139 /* 6140 * Don't process the command as it was never sent 6141 */ 6142 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6143 && (page_list->length > 0)) { 6144 length = min(page_list->length, 6145 SVPD_SUPPORTED_PAGES_SIZE); 6146 for (i = 0; i < length; i++) { 6147 if (page_list->list[i] == 6148 SVPD_UNIT_SERIAL_NUMBER) { 6149 serialnum_supported = 1; 6150 break; 6151 } 6152 } 6153 } else if (cam_periph_error(done_ccb, 0, 6154 SF_RETRY_UA|SF_NO_PRINT, 6155 &softc->saved_ccb) == ERESTART) { 6156 return; 6157 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6158 /* Don't wedge the queue */ 6159 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6160 /*run_queue*/TRUE); 6161 } 6162 6163 if (page_list != NULL) 6164 kfree(page_list, M_DEVBUF); 6165 6166 if (serialnum_supported) { 6167 xpt_release_ccb(done_ccb); 6168 softc->action = PROBE_SERIAL_NUM_1; 6169 xpt_schedule(periph, priority); 6170 return; 6171 } 6172 xpt_release_ccb(done_ccb); 6173 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6174 xpt_schedule(periph, done_ccb->ccb_h.pinfo.priority); 6175 return; 6176 } 6177 6178 case PROBE_SERIAL_NUM_1: 6179 { 6180 struct ccb_scsiio *csio; 6181 struct scsi_vpd_unit_serial_number *serial_buf; 6182 u_int32_t priority; 6183 int changed; 6184 int have_serialnum; 6185 6186 changed = 1; 6187 have_serialnum = 0; 6188 csio = &done_ccb->csio; 6189 priority = done_ccb->ccb_h.pinfo.priority; 6190 serial_buf = 6191 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 6192 6193 /* Clean up from previous instance of this device */ 6194 if (path->device->serial_num != NULL) { 6195 kfree(path->device->serial_num, M_CAMXPT); 6196 path->device->serial_num = NULL; 6197 path->device->serial_num_len = 0; 6198 } 6199 6200 if (serial_buf == NULL) { 6201 /* 6202 * Don't process the command as it was never sent 6203 */ 6204 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6205 && (serial_buf->length > 0)) { 6206 6207 have_serialnum = 1; 6208 path->device->serial_num = 6209 kmalloc((serial_buf->length + 1), 6210 M_CAMXPT, M_INTWAIT); 6211 bcopy(serial_buf->serial_num, 6212 path->device->serial_num, 6213 serial_buf->length); 6214 path->device->serial_num_len = serial_buf->length; 6215 path->device->serial_num[serial_buf->length] = '\0'; 6216 } else if (cam_periph_error(done_ccb, 0, 6217 SF_RETRY_UA|SF_NO_PRINT, 6218 &softc->saved_ccb) == ERESTART) { 6219 return; 6220 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6221 /* Don't wedge the queue */ 6222 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6223 /*run_queue*/TRUE); 6224 } 6225 6226 /* 6227 * Let's see if we have seen this device before. 6228 */ 6229 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 6230 MD5_CTX context; 6231 u_int8_t digest[16]; 6232 6233 MD5Init(&context); 6234 6235 MD5Update(&context, 6236 (unsigned char *)&path->device->inq_data, 6237 sizeof(struct scsi_inquiry_data)); 6238 6239 if (have_serialnum) 6240 MD5Update(&context, serial_buf->serial_num, 6241 serial_buf->length); 6242 6243 MD5Final(digest, &context); 6244 if (bcmp(softc->digest, digest, 16) == 0) 6245 changed = 0; 6246 6247 /* 6248 * XXX Do we need to do a TUR in order to ensure 6249 * that the device really hasn't changed??? 6250 */ 6251 if ((changed != 0) 6252 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 6253 xpt_async(AC_LOST_DEVICE, path, NULL); 6254 } 6255 if (serial_buf != NULL) 6256 kfree(serial_buf, M_CAMXPT); 6257 6258 if (changed != 0) { 6259 /* 6260 * Now that we have all the necessary 6261 * information to safely perform transfer 6262 * negotiations... Controllers don't perform 6263 * any negotiation or tagged queuing until 6264 * after the first XPT_SET_TRAN_SETTINGS ccb is 6265 * received. So, on a new device, just retrieve 6266 * the user settings, and set them as the current 6267 * settings to set the device up. 6268 */ 6269 proberequestdefaultnegotiation(periph); 6270 xpt_release_ccb(done_ccb); 6271 6272 /* 6273 * Perform a TUR to allow the controller to 6274 * perform any necessary transfer negotiation. 6275 */ 6276 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6277 xpt_schedule(periph, priority); 6278 return; 6279 } 6280 xpt_release_ccb(done_ccb); 6281 break; 6282 } 6283 case PROBE_TUR_FOR_NEGOTIATION: 6284 case PROBE_DV_EXIT: 6285 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6286 /* Don't wedge the queue */ 6287 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6288 /*run_queue*/TRUE); 6289 } 6290 6291 xpt_reference_device(path->device); 6292 /* 6293 * Do Domain Validation for lun 0 on devices that claim 6294 * to support Synchronous Transfer modes. 6295 */ 6296 if (softc->action == PROBE_TUR_FOR_NEGOTIATION 6297 && done_ccb->ccb_h.target_lun == 0 6298 && (path->device->inq_data.flags & SID_Sync) != 0 6299 && (path->device->flags & CAM_DEV_IN_DV) == 0) { 6300 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6301 ("Begin Domain Validation\n")); 6302 path->device->flags |= CAM_DEV_IN_DV; 6303 xpt_release_ccb(done_ccb); 6304 softc->action = PROBE_INQUIRY_BASIC_DV1; 6305 xpt_schedule(periph, priority); 6306 return; 6307 } 6308 if (softc->action == PROBE_DV_EXIT) { 6309 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6310 ("Leave Domain Validation\n")); 6311 } 6312 path->device->flags &= 6313 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6314 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6315 /* Inform the XPT that a new device has been found */ 6316 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6317 xpt_action(done_ccb); 6318 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6319 done_ccb); 6320 } 6321 xpt_release_ccb(done_ccb); 6322 break; 6323 case PROBE_INQUIRY_BASIC_DV1: 6324 case PROBE_INQUIRY_BASIC_DV2: 6325 { 6326 struct scsi_inquiry_data *nbuf; 6327 struct ccb_scsiio *csio; 6328 6329 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6330 /* Don't wedge the queue */ 6331 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6332 /*run_queue*/TRUE); 6333 } 6334 csio = &done_ccb->csio; 6335 nbuf = (struct scsi_inquiry_data *)csio->data_ptr; 6336 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { 6337 xpt_print(path, 6338 "inquiry data fails comparison at DV%d step\n", 6339 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); 6340 if (proberequestbackoff(periph, path->device)) { 6341 path->device->flags &= ~CAM_DEV_IN_DV; 6342 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6343 } else { 6344 /* give up */ 6345 softc->action = PROBE_DV_EXIT; 6346 } 6347 kfree(nbuf, M_CAMXPT); 6348 xpt_release_ccb(done_ccb); 6349 xpt_schedule(periph, priority); 6350 return; 6351 } 6352 kfree(nbuf, M_CAMXPT); 6353 if (softc->action == PROBE_INQUIRY_BASIC_DV1) { 6354 softc->action = PROBE_INQUIRY_BASIC_DV2; 6355 xpt_release_ccb(done_ccb); 6356 xpt_schedule(periph, priority); 6357 return; 6358 } 6359 if (softc->action == PROBE_DV_EXIT) { 6360 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6361 ("Leave Domain Validation Successfully\n")); 6362 } 6363 path->device->flags &= 6364 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6365 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6366 /* Inform the XPT that a new device has been found */ 6367 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6368 xpt_action(done_ccb); 6369 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6370 done_ccb); 6371 } 6372 xpt_release_ccb(done_ccb); 6373 break; 6374 } 6375 } 6376 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 6377 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 6378 done_ccb->ccb_h.status = CAM_REQ_CMP; 6379 xpt_done(done_ccb); 6380 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 6381 cam_periph_invalidate(periph); 6382 cam_periph_release(periph); 6383 } else { 6384 probeschedule(periph); 6385 } 6386 } 6387 6388 static void 6389 probecleanup(struct cam_periph *periph) 6390 { 6391 kfree(periph->softc, M_CAMXPT); 6392 } 6393 6394 static void 6395 xpt_find_quirk(struct cam_ed *device) 6396 { 6397 caddr_t match; 6398 6399 match = cam_quirkmatch((caddr_t)&device->inq_data, 6400 (caddr_t)xpt_quirk_table, 6401 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 6402 sizeof(*xpt_quirk_table), scsi_inquiry_match); 6403 6404 if (match == NULL) 6405 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 6406 6407 device->quirk = (struct xpt_quirk_entry *)match; 6408 } 6409 6410 static int 6411 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) 6412 { 6413 int error, bool; 6414 6415 bool = cam_srch_hi; 6416 error = sysctl_handle_int(oidp, &bool, 0, req); 6417 if (error != 0 || req->newptr == NULL) 6418 return (error); 6419 if (bool == 0 || bool == 1) { 6420 cam_srch_hi = bool; 6421 return (0); 6422 } else { 6423 return (EINVAL); 6424 } 6425 } 6426 6427 static void 6428 xpt_devise_transport(struct cam_path *path) 6429 { 6430 struct ccb_pathinq cpi; 6431 struct ccb_trans_settings cts; 6432 struct scsi_inquiry_data *inq_buf; 6433 6434 /* Get transport information from the SIM */ 6435 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 6436 cpi.ccb_h.func_code = XPT_PATH_INQ; 6437 xpt_action((union ccb *)&cpi); 6438 6439 inq_buf = NULL; 6440 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 6441 inq_buf = &path->device->inq_data; 6442 path->device->protocol = PROTO_SCSI; 6443 path->device->protocol_version = 6444 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 6445 path->device->transport = cpi.transport; 6446 path->device->transport_version = cpi.transport_version; 6447 6448 /* 6449 * Any device not using SPI3 features should 6450 * be considered SPI2 or lower. 6451 */ 6452 if (inq_buf != NULL) { 6453 if (path->device->transport == XPORT_SPI 6454 && (inq_buf->spi3data & SID_SPI_MASK) == 0 6455 && path->device->transport_version > 2) 6456 path->device->transport_version = 2; 6457 } else { 6458 struct cam_ed* otherdev; 6459 6460 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 6461 otherdev != NULL; 6462 otherdev = TAILQ_NEXT(otherdev, links)) { 6463 if (otherdev != path->device) 6464 break; 6465 } 6466 6467 if (otherdev != NULL) { 6468 /* 6469 * Initially assume the same versioning as 6470 * prior luns for this target. 6471 */ 6472 path->device->protocol_version = 6473 otherdev->protocol_version; 6474 path->device->transport_version = 6475 otherdev->transport_version; 6476 } else { 6477 /* Until we know better, opt for safty */ 6478 path->device->protocol_version = 2; 6479 if (path->device->transport == XPORT_SPI) 6480 path->device->transport_version = 2; 6481 else 6482 path->device->transport_version = 0; 6483 } 6484 } 6485 6486 /* 6487 * XXX 6488 * For a device compliant with SPC-2 we should be able 6489 * to determine the transport version supported by 6490 * scrutinizing the version descriptors in the 6491 * inquiry buffer. 6492 */ 6493 6494 /* Tell the controller what we think */ 6495 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 6496 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6497 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6498 cts.transport = path->device->transport; 6499 cts.transport_version = path->device->transport_version; 6500 cts.protocol = path->device->protocol; 6501 cts.protocol_version = path->device->protocol_version; 6502 cts.proto_specific.valid = 0; 6503 cts.xport_specific.valid = 0; 6504 xpt_action((union ccb *)&cts); 6505 } 6506 6507 static void 6508 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6509 int async_update) 6510 { 6511 struct ccb_pathinq cpi; 6512 struct ccb_trans_settings cur_cts; 6513 struct ccb_trans_settings_scsi *scsi; 6514 struct ccb_trans_settings_scsi *cur_scsi; 6515 struct cam_sim *sim; 6516 struct scsi_inquiry_data *inq_data; 6517 6518 if (device == NULL) { 6519 cts->ccb_h.status = CAM_PATH_INVALID; 6520 xpt_done((union ccb *)cts); 6521 return; 6522 } 6523 6524 if (cts->protocol == PROTO_UNKNOWN 6525 || cts->protocol == PROTO_UNSPECIFIED) { 6526 cts->protocol = device->protocol; 6527 cts->protocol_version = device->protocol_version; 6528 } 6529 6530 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 6531 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 6532 cts->protocol_version = device->protocol_version; 6533 6534 if (cts->protocol != device->protocol) { 6535 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", 6536 cts->protocol, device->protocol); 6537 cts->protocol = device->protocol; 6538 } 6539 6540 if (cts->protocol_version > device->protocol_version) { 6541 if (bootverbose) { 6542 xpt_print(cts->ccb_h.path, "Down reving Protocol " 6543 "Version from %d to %d?\n", cts->protocol_version, 6544 device->protocol_version); 6545 } 6546 cts->protocol_version = device->protocol_version; 6547 } 6548 6549 if (cts->transport == XPORT_UNKNOWN 6550 || cts->transport == XPORT_UNSPECIFIED) { 6551 cts->transport = device->transport; 6552 cts->transport_version = device->transport_version; 6553 } 6554 6555 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6556 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6557 cts->transport_version = device->transport_version; 6558 6559 if (cts->transport != device->transport) { 6560 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", 6561 cts->transport, device->transport); 6562 cts->transport = device->transport; 6563 } 6564 6565 if (cts->transport_version > device->transport_version) { 6566 if (bootverbose) { 6567 xpt_print(cts->ccb_h.path, "Down reving Transport " 6568 "Version from %d to %d?\n", cts->transport_version, 6569 device->transport_version); 6570 } 6571 cts->transport_version = device->transport_version; 6572 } 6573 6574 sim = cts->ccb_h.path->bus->sim; 6575 6576 /* 6577 * Nothing more of interest to do unless 6578 * this is a device connected via the 6579 * SCSI protocol. 6580 */ 6581 if (cts->protocol != PROTO_SCSI) { 6582 if (async_update == FALSE) 6583 (*(sim->sim_action))(sim, (union ccb *)cts); 6584 return; 6585 } 6586 6587 inq_data = &device->inq_data; 6588 scsi = &cts->proto_specific.scsi; 6589 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6590 cpi.ccb_h.func_code = XPT_PATH_INQ; 6591 xpt_action((union ccb *)&cpi); 6592 6593 /* SCSI specific sanity checking */ 6594 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6595 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 6596 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6597 || (device->quirk->mintags == 0)) { 6598 /* 6599 * Can't tag on hardware that doesn't support tags, 6600 * doesn't have it enabled, or has broken tag support. 6601 */ 6602 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6603 } 6604 6605 if (async_update == FALSE) { 6606 /* 6607 * Perform sanity checking against what the 6608 * controller and device can do. 6609 */ 6610 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6611 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6612 cur_cts.type = cts->type; 6613 xpt_action((union ccb *)&cur_cts); 6614 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6615 return; 6616 } 6617 cur_scsi = &cur_cts.proto_specific.scsi; 6618 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6619 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6620 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6621 } 6622 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6623 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6624 } 6625 6626 /* SPI specific sanity checking */ 6627 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6628 u_int spi3caps; 6629 struct ccb_trans_settings_spi *spi; 6630 struct ccb_trans_settings_spi *cur_spi; 6631 6632 spi = &cts->xport_specific.spi; 6633 6634 cur_spi = &cur_cts.xport_specific.spi; 6635 6636 /* Fill in any gaps in what the user gave us */ 6637 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6638 spi->sync_period = cur_spi->sync_period; 6639 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6640 spi->sync_period = 0; 6641 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6642 spi->sync_offset = cur_spi->sync_offset; 6643 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6644 spi->sync_offset = 0; 6645 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6646 spi->ppr_options = cur_spi->ppr_options; 6647 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6648 spi->ppr_options = 0; 6649 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6650 spi->bus_width = cur_spi->bus_width; 6651 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6652 spi->bus_width = 0; 6653 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6654 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6655 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6656 } 6657 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6658 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6659 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6660 && (inq_data->flags & SID_Sync) == 0 6661 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6662 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6663 || (spi->sync_offset == 0) 6664 || (spi->sync_period == 0)) { 6665 /* Force async */ 6666 spi->sync_period = 0; 6667 spi->sync_offset = 0; 6668 } 6669 6670 switch (spi->bus_width) { 6671 case MSG_EXT_WDTR_BUS_32_BIT: 6672 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6673 || (inq_data->flags & SID_WBus32) != 0 6674 || cts->type == CTS_TYPE_USER_SETTINGS) 6675 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6676 break; 6677 /* Fall Through to 16-bit */ 6678 case MSG_EXT_WDTR_BUS_16_BIT: 6679 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6680 || (inq_data->flags & SID_WBus16) != 0 6681 || cts->type == CTS_TYPE_USER_SETTINGS) 6682 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6683 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6684 break; 6685 } 6686 /* Fall Through to 8-bit */ 6687 default: /* New bus width?? */ 6688 case MSG_EXT_WDTR_BUS_8_BIT: 6689 /* All targets can do this */ 6690 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6691 break; 6692 } 6693 6694 spi3caps = cpi.xport_specific.spi.ppr_options; 6695 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6696 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6697 spi3caps &= inq_data->spi3data; 6698 6699 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6700 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6701 6702 if ((spi3caps & SID_SPI_IUS) == 0) 6703 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6704 6705 if ((spi3caps & SID_SPI_QAS) == 0) 6706 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6707 6708 /* No SPI Transfer settings are allowed unless we are wide */ 6709 if (spi->bus_width == 0) 6710 spi->ppr_options = 0; 6711 6712 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { 6713 /* 6714 * Can't tag queue without disconnection. 6715 */ 6716 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6717 scsi->valid |= CTS_SCSI_VALID_TQ; 6718 } 6719 6720 /* 6721 * If we are currently performing tagged transactions to 6722 * this device and want to change its negotiation parameters, 6723 * go non-tagged for a bit to give the controller a chance to 6724 * negotiate unhampered by tag messages. 6725 */ 6726 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6727 && (device->inq_flags & SID_CmdQue) != 0 6728 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6729 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6730 CTS_SPI_VALID_SYNC_OFFSET| 6731 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6732 xpt_toggle_tags(cts->ccb_h.path); 6733 } 6734 6735 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6736 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6737 int device_tagenb; 6738 6739 /* 6740 * If we are transitioning from tags to no-tags or 6741 * vice-versa, we need to carefully freeze and restart 6742 * the queue so that we don't overlap tagged and non-tagged 6743 * commands. We also temporarily stop tags if there is 6744 * a change in transfer negotiation settings to allow 6745 * "tag-less" negotiation. 6746 */ 6747 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6748 || (device->inq_flags & SID_CmdQue) != 0) 6749 device_tagenb = TRUE; 6750 else 6751 device_tagenb = FALSE; 6752 6753 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6754 && device_tagenb == FALSE) 6755 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6756 && device_tagenb == TRUE)) { 6757 6758 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6759 /* 6760 * Delay change to use tags until after a 6761 * few commands have gone to this device so 6762 * the controller has time to perform transfer 6763 * negotiations without tagged messages getting 6764 * in the way. 6765 */ 6766 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6767 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6768 } else { 6769 struct ccb_relsim crs; 6770 6771 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6772 device->inq_flags &= ~SID_CmdQue; 6773 xpt_dev_ccbq_resize(cts->ccb_h.path, 6774 sim->max_dev_openings); 6775 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6776 device->tag_delay_count = 0; 6777 6778 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6779 /*priority*/1); 6780 crs.ccb_h.func_code = XPT_REL_SIMQ; 6781 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6782 crs.openings 6783 = crs.release_timeout 6784 = crs.qfrozen_cnt 6785 = 0; 6786 xpt_action((union ccb *)&crs); 6787 } 6788 } 6789 } 6790 if (async_update == FALSE) 6791 (*(sim->sim_action))(sim, (union ccb *)cts); 6792 } 6793 6794 static void 6795 xpt_toggle_tags(struct cam_path *path) 6796 { 6797 struct cam_ed *dev; 6798 6799 /* 6800 * Give controllers a chance to renegotiate 6801 * before starting tag operations. We 6802 * "toggle" tagged queuing off then on 6803 * which causes the tag enable command delay 6804 * counter to come into effect. 6805 */ 6806 dev = path->device; 6807 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6808 || ((dev->inq_flags & SID_CmdQue) != 0 6809 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6810 struct ccb_trans_settings cts; 6811 6812 xpt_setup_ccb(&cts.ccb_h, path, 1); 6813 cts.protocol = PROTO_SCSI; 6814 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6815 cts.transport = XPORT_UNSPECIFIED; 6816 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6817 cts.proto_specific.scsi.flags = 0; 6818 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6819 xpt_set_transfer_settings(&cts, path->device, 6820 /*async_update*/TRUE); 6821 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6822 xpt_set_transfer_settings(&cts, path->device, 6823 /*async_update*/TRUE); 6824 } 6825 } 6826 6827 static void 6828 xpt_start_tags(struct cam_path *path) 6829 { 6830 struct ccb_relsim crs; 6831 struct cam_ed *device; 6832 struct cam_sim *sim; 6833 int newopenings; 6834 6835 device = path->device; 6836 sim = path->bus->sim; 6837 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6838 xpt_freeze_devq(path, /*count*/1); 6839 device->inq_flags |= SID_CmdQue; 6840 if (device->tag_saved_openings != 0) 6841 newopenings = device->tag_saved_openings; 6842 else 6843 newopenings = min(device->quirk->maxtags, 6844 sim->max_tagged_dev_openings); 6845 xpt_dev_ccbq_resize(path, newopenings); 6846 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6847 crs.ccb_h.func_code = XPT_REL_SIMQ; 6848 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6849 crs.openings 6850 = crs.release_timeout 6851 = crs.qfrozen_cnt 6852 = 0; 6853 xpt_action((union ccb *)&crs); 6854 } 6855 6856 static int busses_to_config; 6857 static int busses_to_reset; 6858 6859 static int 6860 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6861 { 6862 6863 sim_lock_assert_owned(bus->sim->lock); 6864 6865 if (bus->path_id != CAM_XPT_PATH_ID) { 6866 struct cam_path path; 6867 struct ccb_pathinq cpi; 6868 int can_negotiate; 6869 6870 busses_to_config++; 6871 xpt_compile_path(&path, NULL, bus->path_id, 6872 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6873 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6874 cpi.ccb_h.func_code = XPT_PATH_INQ; 6875 xpt_action((union ccb *)&cpi); 6876 can_negotiate = cpi.hba_inquiry; 6877 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6878 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6879 && can_negotiate) 6880 busses_to_reset++; 6881 xpt_release_path(&path); 6882 } 6883 6884 return(1); 6885 } 6886 6887 static int 6888 xptconfigfunc(struct cam_eb *bus, void *arg) 6889 { 6890 struct cam_path *path; 6891 union ccb *work_ccb; 6892 6893 sim_lock_assert_owned(bus->sim->lock); 6894 6895 if (bus->path_id != CAM_XPT_PATH_ID) { 6896 cam_status status; 6897 int can_negotiate; 6898 6899 work_ccb = xpt_alloc_ccb(); 6900 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6901 CAM_TARGET_WILDCARD, 6902 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6903 kprintf("xptconfigfunc: xpt_create_path failed with " 6904 "status %#x for bus %d\n", status, bus->path_id); 6905 kprintf("xptconfigfunc: halting bus configuration\n"); 6906 xpt_free_ccb(work_ccb); 6907 busses_to_config--; 6908 xpt_finishconfig(xpt_periph, NULL); 6909 return(0); 6910 } 6911 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6912 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6913 xpt_action(work_ccb); 6914 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6915 kprintf("xptconfigfunc: CPI failed on bus %d " 6916 "with status %d\n", bus->path_id, 6917 work_ccb->ccb_h.status); 6918 xpt_finishconfig(xpt_periph, work_ccb); 6919 return(1); 6920 } 6921 6922 can_negotiate = work_ccb->cpi.hba_inquiry; 6923 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6924 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6925 && (can_negotiate != 0)) { 6926 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6927 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6928 work_ccb->ccb_h.cbfcnp = NULL; 6929 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6930 ("Resetting Bus\n")); 6931 xpt_action(work_ccb); 6932 xpt_finishconfig(xpt_periph, work_ccb); 6933 } else { 6934 /* Act as though we performed a successful BUS RESET */ 6935 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6936 xpt_finishconfig(xpt_periph, work_ccb); 6937 } 6938 } 6939 6940 return(1); 6941 } 6942 6943 static void 6944 xpt_config(void *arg) 6945 { 6946 /* 6947 * Now that interrupts are enabled, go find our devices 6948 */ 6949 6950 #ifdef CAMDEBUG 6951 /* Setup debugging flags and path */ 6952 #ifdef CAM_DEBUG_FLAGS 6953 cam_dflags = CAM_DEBUG_FLAGS; 6954 #else /* !CAM_DEBUG_FLAGS */ 6955 cam_dflags = CAM_DEBUG_NONE; 6956 #endif /* CAM_DEBUG_FLAGS */ 6957 #ifdef CAM_DEBUG_BUS 6958 if (cam_dflags != CAM_DEBUG_NONE) { 6959 /* 6960 * Locking is specifically omitted here. No SIMs have 6961 * registered yet, so xpt_create_path will only be searching 6962 * empty lists of targets and devices. 6963 */ 6964 if (xpt_create_path(&cam_dpath, xpt_periph, 6965 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6966 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6967 kprintf("xpt_config: xpt_create_path() failed for debug" 6968 " target %d:%d:%d, debugging disabled\n", 6969 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6970 cam_dflags = CAM_DEBUG_NONE; 6971 } 6972 } else 6973 cam_dpath = NULL; 6974 #else /* !CAM_DEBUG_BUS */ 6975 cam_dpath = NULL; 6976 #endif /* CAM_DEBUG_BUS */ 6977 #endif /* CAMDEBUG */ 6978 6979 /* 6980 * Scan all installed busses. 6981 */ 6982 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6983 6984 if (busses_to_config == 0) { 6985 /* Call manually because we don't have any busses */ 6986 xpt_finishconfig(xpt_periph, NULL); 6987 } else { 6988 if (busses_to_reset > 0 && scsi_delay >= 2000) { 6989 kprintf("Waiting %d seconds for SCSI " 6990 "devices to settle\n", scsi_delay/1000); 6991 } 6992 xpt_for_all_busses(xptconfigfunc, NULL); 6993 } 6994 } 6995 6996 /* 6997 * If the given device only has one peripheral attached to it, and if that 6998 * peripheral is the passthrough driver, announce it. This insures that the 6999 * user sees some sort of announcement for every peripheral in their system. 7000 */ 7001 static int 7002 xptpassannouncefunc(struct cam_ed *device, void *arg) 7003 { 7004 struct cam_periph *periph; 7005 int i; 7006 7007 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 7008 periph = SLIST_NEXT(periph, periph_links), i++); 7009 7010 periph = SLIST_FIRST(&device->periphs); 7011 if ((i == 1) 7012 && (strncmp(periph->periph_name, "pass", 4) == 0)) 7013 xpt_announce_periph(periph, NULL); 7014 7015 return(1); 7016 } 7017 7018 static void 7019 xpt_finishconfig_task(void *context, int pending) 7020 { 7021 struct periph_driver **p_drv; 7022 int i; 7023 7024 if (busses_to_config == 0) { 7025 /* Register all the peripheral drivers */ 7026 /* XXX This will have to change when we have loadable modules */ 7027 p_drv = periph_drivers; 7028 for (i = 0; p_drv[i] != NULL; i++) { 7029 (*p_drv[i]->init)(); 7030 } 7031 7032 /* 7033 * Check for devices with no "standard" peripheral driver 7034 * attached. For any devices like that, announce the 7035 * passthrough driver so the user will see something. 7036 */ 7037 xpt_for_all_devices(xptpassannouncefunc, NULL); 7038 7039 /* Release our hook so that the boot can continue. */ 7040 config_intrhook_disestablish(xsoftc.xpt_config_hook); 7041 kfree(xsoftc.xpt_config_hook, M_CAMXPT); 7042 xsoftc.xpt_config_hook = NULL; 7043 } 7044 7045 kfree(context, M_CAMXPT); 7046 } 7047 7048 static void 7049 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 7050 { 7051 struct xpt_task *task; 7052 7053 if (done_ccb != NULL) { 7054 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 7055 ("xpt_finishconfig\n")); 7056 switch(done_ccb->ccb_h.func_code) { 7057 case XPT_RESET_BUS: 7058 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 7059 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 7060 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 7061 done_ccb->crcn.flags = 0; 7062 xpt_action(done_ccb); 7063 return; 7064 } 7065 /* FALLTHROUGH */ 7066 case XPT_SCAN_BUS: 7067 default: 7068 xpt_free_path(done_ccb->ccb_h.path); 7069 busses_to_config--; 7070 break; 7071 } 7072 } 7073 7074 if (busses_to_config == 0) { 7075 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, M_INTWAIT); 7076 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 7077 taskqueue_enqueue(taskqueue_thread[mycpuid], &task->task); 7078 } 7079 7080 if (done_ccb != NULL) 7081 xpt_free_ccb(done_ccb); 7082 } 7083 7084 cam_status 7085 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 7086 struct cam_path *path) 7087 { 7088 struct ccb_setasync csa; 7089 cam_status status; 7090 int xptpath = 0; 7091 7092 if (path == NULL) { 7093 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7094 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 7095 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 7096 if (status != CAM_REQ_CMP) { 7097 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7098 return (status); 7099 } 7100 xptpath = 1; 7101 } 7102 7103 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 7104 csa.ccb_h.func_code = XPT_SASYNC_CB; 7105 csa.event_enable = event; 7106 csa.callback = cbfunc; 7107 csa.callback_arg = cbarg; 7108 xpt_action((union ccb *)&csa); 7109 status = csa.ccb_h.status; 7110 if (xptpath) { 7111 xpt_free_path(path); 7112 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7113 } 7114 return (status); 7115 } 7116 7117 static void 7118 xptaction(struct cam_sim *sim, union ccb *work_ccb) 7119 { 7120 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 7121 7122 switch (work_ccb->ccb_h.func_code) { 7123 /* Common cases first */ 7124 case XPT_PATH_INQ: /* Path routing inquiry */ 7125 { 7126 struct ccb_pathinq *cpi; 7127 7128 cpi = &work_ccb->cpi; 7129 cpi->version_num = 1; /* XXX??? */ 7130 cpi->hba_inquiry = 0; 7131 cpi->target_sprt = 0; 7132 cpi->hba_misc = 0; 7133 cpi->hba_eng_cnt = 0; 7134 cpi->max_target = 0; 7135 cpi->max_lun = 0; 7136 cpi->initiator_id = 0; 7137 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 7138 strncpy(cpi->hba_vid, "", HBA_IDLEN); 7139 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 7140 cpi->unit_number = sim->unit_number; 7141 cpi->bus_id = sim->bus_id; 7142 cpi->base_transfer_speed = 0; 7143 cpi->protocol = PROTO_UNSPECIFIED; 7144 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 7145 cpi->transport = XPORT_UNSPECIFIED; 7146 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 7147 cpi->ccb_h.status = CAM_REQ_CMP; 7148 xpt_done(work_ccb); 7149 break; 7150 } 7151 default: 7152 work_ccb->ccb_h.status = CAM_REQ_INVALID; 7153 xpt_done(work_ccb); 7154 break; 7155 } 7156 } 7157 7158 /* 7159 * The xpt as a "controller" has no interrupt sources, so polling 7160 * is a no-op. 7161 */ 7162 static void 7163 xptpoll(struct cam_sim *sim) 7164 { 7165 } 7166 7167 void 7168 xpt_lock_buses(void) 7169 { 7170 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 7171 } 7172 7173 void 7174 xpt_unlock_buses(void) 7175 { 7176 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 7177 } 7178 7179 7180 /* 7181 * Should only be called by the machine interrupt dispatch routines, 7182 * so put these prototypes here instead of in the header. 7183 */ 7184 7185 static void 7186 swi_cambio(void *arg, void *frame) 7187 { 7188 camisr(NULL); 7189 } 7190 7191 static void 7192 camisr(void *dummy) 7193 { 7194 cam_simq_t queue; 7195 struct cam_sim *sim; 7196 7197 spin_lock_wr(&cam_simq_spin); 7198 TAILQ_INIT(&queue); 7199 TAILQ_CONCAT(&queue, &cam_simq, links); 7200 spin_unlock_wr(&cam_simq_spin); 7201 7202 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 7203 TAILQ_REMOVE(&queue, sim, links); 7204 CAM_SIM_LOCK(sim); 7205 sim->flags &= ~CAM_SIM_ON_DONEQ; 7206 camisr_runqueue(sim); 7207 CAM_SIM_UNLOCK(sim); 7208 } 7209 } 7210 7211 static void 7212 camisr_runqueue(struct cam_sim *sim) 7213 { 7214 struct ccb_hdr *ccb_h; 7215 int runq; 7216 7217 spin_lock_wr(&sim->sim_spin); 7218 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { 7219 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); 7220 spin_unlock_wr(&sim->sim_spin); 7221 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 7222 7223 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 7224 ("camisr\n")); 7225 7226 runq = FALSE; 7227 7228 if (ccb_h->flags & CAM_HIGH_POWER) { 7229 struct highpowerlist *hphead; 7230 struct cam_ed *device; 7231 union ccb *send_ccb; 7232 7233 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7234 hphead = &xsoftc.highpowerq; 7235 7236 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 7237 7238 /* 7239 * Increment the count since this command is done. 7240 */ 7241 xsoftc.num_highpower++; 7242 7243 /* 7244 * Any high powered commands queued up? 7245 */ 7246 if (send_ccb != NULL) { 7247 device = send_ccb->ccb_h.path->device; 7248 7249 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 7250 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7251 7252 xpt_release_devq(send_ccb->ccb_h.path, 7253 /*count*/1, /*runqueue*/TRUE); 7254 } else 7255 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7256 } 7257 7258 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 7259 struct cam_ed *dev; 7260 7261 dev = ccb_h->path->device; 7262 7263 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 7264 7265 /* 7266 * devq may be NULL if this is cam_dead_sim 7267 */ 7268 if (ccb_h->path->bus->sim->devq) { 7269 ccb_h->path->bus->sim->devq->send_active--; 7270 ccb_h->path->bus->sim->devq->send_openings++; 7271 } 7272 7273 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 7274 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 7275 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 7276 && (dev->ccbq.dev_active == 0))) { 7277 7278 xpt_release_devq(ccb_h->path, /*count*/1, 7279 /*run_queue*/TRUE); 7280 } 7281 7282 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 7283 && (--dev->tag_delay_count == 0)) 7284 xpt_start_tags(ccb_h->path); 7285 7286 if ((dev->ccbq.queue.entries > 0) 7287 && (dev->qfrozen_cnt == 0) 7288 && (device_is_send_queued(dev) == 0)) { 7289 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 7290 dev); 7291 } 7292 } 7293 7294 if (ccb_h->status & CAM_RELEASE_SIMQ) { 7295 xpt_release_simq(ccb_h->path->bus->sim, 7296 /*run_queue*/TRUE); 7297 ccb_h->status &= ~CAM_RELEASE_SIMQ; 7298 runq = FALSE; 7299 } 7300 7301 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 7302 && (ccb_h->status & CAM_DEV_QFRZN)) { 7303 xpt_release_devq(ccb_h->path, /*count*/1, 7304 /*run_queue*/TRUE); 7305 ccb_h->status &= ~CAM_DEV_QFRZN; 7306 } else if (runq) { 7307 xpt_run_dev_sendq(ccb_h->path->bus); 7308 } 7309 7310 /* Call the peripheral driver's callback */ 7311 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 7312 spin_lock_wr(&sim->sim_spin); 7313 } 7314 spin_unlock_wr(&sim->sim_spin); 7315 } 7316 7317 /* 7318 * The dead_sim isn't completely hooked into CAM, we have to make sure 7319 * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() 7320 * doesn't block. 7321 */ 7322 static void 7323 dead_sim_action(struct cam_sim *sim, union ccb *ccb) 7324 { 7325 7326 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 7327 xpt_done(ccb); 7328 camisr_runqueue(sim); 7329 } 7330 7331 static void 7332 dead_sim_poll(struct cam_sim *sim) 7333 { 7334 } 7335