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