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