1 /* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ 30 * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.68 2008/08/23 17:13:31 pavalos Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/md5.h> 42 #include <sys/devicestat.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/taskqueue.h> 46 #include <sys/bus.h> 47 #include <sys/thread.h> 48 #include <sys/lock.h> 49 #include <sys/spinlock.h> 50 #include <sys/thread2.h> 51 #include <sys/spinlock2.h> 52 53 #include <machine/clock.h> 54 #include <machine/stdarg.h> 55 56 #include "cam.h" 57 #include "cam_ccb.h" 58 #include "cam_periph.h" 59 #include "cam_sim.h" 60 #include "cam_xpt.h" 61 #include "cam_xpt_sim.h" 62 #include "cam_xpt_periph.h" 63 #include "cam_debug.h" 64 65 #include "scsi/scsi_all.h" 66 #include "scsi/scsi_message.h" 67 #include "scsi/scsi_pass.h" 68 #include <sys/kthread.h> 69 #include "opt_cam.h" 70 71 /* Datastructures internal to the xpt layer */ 72 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 73 74 /* Object for defering XPT actions to a taskqueue */ 75 struct xpt_task { 76 struct task task; 77 void *data1; 78 uintptr_t data2; 79 }; 80 81 /* 82 * Definition of an async handler callback block. These are used to add 83 * SIMs and peripherals to the async callback lists. 84 */ 85 struct async_node { 86 SLIST_ENTRY(async_node) links; 87 u_int32_t event_enable; /* Async Event enables */ 88 void (*callback)(void *arg, u_int32_t code, 89 struct cam_path *path, void *args); 90 void *callback_arg; 91 }; 92 93 SLIST_HEAD(async_list, async_node); 94 SLIST_HEAD(periph_list, cam_periph); 95 96 /* 97 * This is the maximum number of high powered commands (e.g. start unit) 98 * that can be outstanding at a particular time. 99 */ 100 #ifndef CAM_MAX_HIGHPOWER 101 #define CAM_MAX_HIGHPOWER 4 102 #endif 103 104 /* 105 * Structure for queueing a device in a run queue. 106 * There is one run queue for allocating new ccbs, 107 * and another for sending ccbs to the controller. 108 */ 109 struct cam_ed_qinfo { 110 cam_pinfo pinfo; 111 struct cam_ed *device; 112 }; 113 114 /* 115 * The CAM EDT (Existing Device Table) contains the device information for 116 * all devices for all busses in the system. The table contains a 117 * cam_ed structure for each device on the bus. 118 */ 119 struct cam_ed { 120 TAILQ_ENTRY(cam_ed) links; 121 struct cam_ed_qinfo alloc_ccb_entry; 122 struct cam_ed_qinfo send_ccb_entry; 123 struct cam_et *target; 124 struct cam_sim *sim; 125 lun_id_t lun_id; 126 struct camq drvq; /* 127 * Queue of type drivers wanting to do 128 * work on this device. 129 */ 130 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 131 struct async_list asyncs; /* Async callback info for this B/T/L */ 132 struct periph_list periphs; /* All attached devices */ 133 u_int generation; /* Generation number */ 134 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 135 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 136 /* Storage for the inquiry data */ 137 cam_proto protocol; 138 u_int protocol_version; 139 cam_xport transport; 140 u_int transport_version; 141 struct scsi_inquiry_data inq_data; 142 u_int8_t inq_flags; /* 143 * Current settings for inquiry flags. 144 * This allows us to override settings 145 * like disconnection and tagged 146 * queuing for a device. 147 */ 148 u_int8_t queue_flags; /* Queue flags from the control page */ 149 u_int8_t serial_num_len; 150 u_int8_t *serial_num; 151 u_int32_t qfrozen_cnt; 152 u_int32_t flags; 153 #define CAM_DEV_UNCONFIGURED 0x01 154 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 155 #define CAM_DEV_REL_ON_COMPLETE 0x04 156 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 157 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 158 #define CAM_DEV_TAG_AFTER_COUNT 0x20 159 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 160 #define CAM_DEV_IN_DV 0x80 161 #define CAM_DEV_DV_HIT_BOTTOM 0x100 162 u_int32_t tag_delay_count; 163 #define CAM_TAG_DELAY_COUNT 5 164 u_int32_t tag_saved_openings; 165 u_int32_t refcount; 166 struct callout callout; 167 }; 168 169 /* 170 * Each target is represented by an ET (Existing Target). These 171 * entries are created when a target is successfully probed with an 172 * identify, and removed when a device fails to respond after a number 173 * of retries, or a bus rescan finds the device missing. 174 */ 175 struct cam_et { 176 TAILQ_HEAD(, cam_ed) ed_entries; 177 TAILQ_ENTRY(cam_et) links; 178 struct cam_eb *bus; 179 target_id_t target_id; 180 u_int32_t refcount; 181 u_int generation; 182 struct timeval last_reset; /* uptime of last reset */ 183 }; 184 185 /* 186 * Each bus is represented by an EB (Existing Bus). These entries 187 * are created by calls to xpt_bus_register and deleted by calls to 188 * xpt_bus_deregister. 189 */ 190 struct cam_eb { 191 TAILQ_HEAD(, cam_et) et_entries; 192 TAILQ_ENTRY(cam_eb) links; 193 path_id_t path_id; 194 struct cam_sim *sim; 195 struct timeval last_reset; /* uptime of last reset */ 196 u_int32_t flags; 197 #define CAM_EB_RUNQ_SCHEDULED 0x01 198 u_int32_t refcount; 199 u_int generation; 200 }; 201 202 struct cam_path { 203 struct cam_periph *periph; 204 struct cam_eb *bus; 205 struct cam_et *target; 206 struct cam_ed *device; 207 }; 208 209 struct xpt_quirk_entry { 210 struct scsi_inquiry_pattern inq_pat; 211 u_int8_t quirks; 212 #define CAM_QUIRK_NOLUNS 0x01 213 #define CAM_QUIRK_NOSERIAL 0x02 214 #define CAM_QUIRK_HILUNS 0x04 215 #define CAM_QUIRK_NOHILUNS 0x08 216 u_int mintags; 217 u_int maxtags; 218 }; 219 220 static int cam_srch_hi = 0; 221 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi); 222 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS); 223 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0, 224 sysctl_cam_search_luns, "I", 225 "allow search above LUN 7 for SCSI3 and greater devices"); 226 227 #define CAM_SCSI2_MAXLUN 8 228 /* 229 * If we're not quirked to search <= the first 8 luns 230 * and we are either quirked to search above lun 8, 231 * or we're > SCSI-2 and we've enabled hilun searching, 232 * or we're > SCSI-2 and the last lun was a success, 233 * we can look for luns above lun 8. 234 */ 235 #define CAN_SRCH_HI_SPARSE(dv) \ 236 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 237 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 238 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi))) 239 240 #define CAN_SRCH_HI_DENSE(dv) \ 241 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 242 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 243 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))) 244 245 typedef enum { 246 XPT_FLAG_OPEN = 0x01 247 } xpt_flags; 248 249 struct xpt_softc { 250 xpt_flags flags; 251 u_int32_t xpt_generation; 252 253 /* number of high powered commands that can go through right now */ 254 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 255 int num_highpower; 256 257 /* queue for handling async rescan requests. */ 258 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 259 int ccb_scanq_running; 260 261 /* Registered busses */ 262 TAILQ_HEAD(,cam_eb) xpt_busses; 263 u_int bus_generation; 264 265 struct intr_config_hook *xpt_config_hook; 266 267 struct lock xpt_topo_lock; 268 struct lock xpt_lock; 269 }; 270 271 static const char quantum[] = "QUANTUM"; 272 static const char sony[] = "SONY"; 273 static const char west_digital[] = "WDIGTL"; 274 static const char samsung[] = "SAMSUNG"; 275 static const char seagate[] = "SEAGATE"; 276 static const char microp[] = "MICROP"; 277 278 static struct xpt_quirk_entry xpt_quirk_table[] = 279 { 280 { 281 /* Reports QUEUE FULL for temporary resource shortages */ 282 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 283 /*quirks*/0, /*mintags*/24, /*maxtags*/32 284 }, 285 { 286 /* Reports QUEUE FULL for temporary resource shortages */ 287 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 288 /*quirks*/0, /*mintags*/24, /*maxtags*/32 289 }, 290 { 291 /* Reports QUEUE FULL for temporary resource shortages */ 292 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 293 /*quirks*/0, /*mintags*/24, /*maxtags*/32 294 }, 295 { 296 /* Broken tagged queuing drive */ 297 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 298 /*quirks*/0, /*mintags*/0, /*maxtags*/0 299 }, 300 { 301 /* Broken tagged queuing drive */ 302 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 303 /*quirks*/0, /*mintags*/0, /*maxtags*/0 304 }, 305 { 306 /* Broken tagged queuing drive */ 307 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 308 /*quirks*/0, /*mintags*/0, /*maxtags*/0 309 }, 310 { 311 /* 312 * Unfortunately, the Quantum Atlas III has the same 313 * problem as the Atlas II drives above. 314 * Reported by: "Johan Granlund" <johan@granlund.nu> 315 * 316 * For future reference, the drive with the problem was: 317 * QUANTUM QM39100TD-SW N1B0 318 * 319 * It's possible that Quantum will fix the problem in later 320 * firmware revisions. If that happens, the quirk entry 321 * will need to be made specific to the firmware revisions 322 * with the problem. 323 * 324 */ 325 /* Reports QUEUE FULL for temporary resource shortages */ 326 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 327 /*quirks*/0, /*mintags*/24, /*maxtags*/32 328 }, 329 { 330 /* 331 * 18 Gig Atlas III, same problem as the 9G version. 332 * Reported by: Andre Albsmeier 333 * <andre.albsmeier@mchp.siemens.de> 334 * 335 * For future reference, the drive with the problem was: 336 * QUANTUM QM318000TD-S N491 337 */ 338 /* Reports QUEUE FULL for temporary resource shortages */ 339 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 340 /*quirks*/0, /*mintags*/24, /*maxtags*/32 341 }, 342 { 343 /* 344 * Broken tagged queuing drive 345 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 346 * and: Martin Renters <martin@tdc.on.ca> 347 */ 348 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 349 /*quirks*/0, /*mintags*/0, /*maxtags*/0 350 }, 351 /* 352 * The Seagate Medalist Pro drives have very poor write 353 * performance with anything more than 2 tags. 354 * 355 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 356 * Drive: <SEAGATE ST36530N 1444> 357 * 358 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 359 * Drive: <SEAGATE ST34520W 1281> 360 * 361 * No one has actually reported that the 9G version 362 * (ST39140*) of the Medalist Pro has the same problem, but 363 * we're assuming that it does because the 4G and 6.5G 364 * versions of the drive are broken. 365 */ 366 { 367 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 368 /*quirks*/0, /*mintags*/2, /*maxtags*/2 369 }, 370 { 371 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 372 /*quirks*/0, /*mintags*/2, /*maxtags*/2 373 }, 374 { 375 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 376 /*quirks*/0, /*mintags*/2, /*maxtags*/2 377 }, 378 { 379 /* 380 * Slow when tagged queueing is enabled. Write performance 381 * steadily drops off with more and more concurrent 382 * transactions. Best sequential write performance with 383 * tagged queueing turned off and write caching turned on. 384 * 385 * PR: kern/10398 386 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 387 * Drive: DCAS-34330 w/ "S65A" firmware. 388 * 389 * The drive with the problem had the "S65A" firmware 390 * revision, and has also been reported (by Stephen J. 391 * Roznowski <sjr@home.net>) for a drive with the "S61A" 392 * firmware revision. 393 * 394 * Although no one has reported problems with the 2 gig 395 * version of the DCAS drive, the assumption is that it 396 * has the same problems as the 4 gig version. Therefore 397 * this quirk entries disables tagged queueing for all 398 * DCAS drives. 399 */ 400 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 401 /*quirks*/0, /*mintags*/0, /*maxtags*/0 402 }, 403 { 404 /* Broken tagged queuing drive */ 405 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 406 /*quirks*/0, /*mintags*/0, /*maxtags*/0 407 }, 408 { 409 /* Broken tagged queuing drive */ 410 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 411 /*quirks*/0, /*mintags*/0, /*maxtags*/0 412 }, 413 { 414 /* This does not support other than LUN 0 */ 415 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" }, 416 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 417 }, 418 { 419 /* 420 * Broken tagged queuing drive. 421 * Submitted by: 422 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 423 * in PR kern/9535 424 */ 425 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 426 /*quirks*/0, /*mintags*/0, /*maxtags*/0 427 }, 428 { 429 /* 430 * Slow when tagged queueing is enabled. (1.5MB/sec versus 431 * 8MB/sec.) 432 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 433 * Best performance with these drives is achieved with 434 * tagged queueing turned off, and write caching turned on. 435 */ 436 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 437 /*quirks*/0, /*mintags*/0, /*maxtags*/0 438 }, 439 { 440 /* 441 * Slow when tagged queueing is enabled. (1.5MB/sec versus 442 * 8MB/sec.) 443 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 444 * Best performance with these drives is achieved with 445 * tagged queueing turned off, and write caching turned on. 446 */ 447 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 448 /*quirks*/0, /*mintags*/0, /*maxtags*/0 449 }, 450 { 451 /* 452 * Doesn't handle queue full condition correctly, 453 * so we need to limit maxtags to what the device 454 * can handle instead of determining this automatically. 455 */ 456 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 457 /*quirks*/0, /*mintags*/2, /*maxtags*/32 458 }, 459 { 460 /* Really only one LUN */ 461 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 462 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 463 }, 464 { 465 /* I can't believe we need a quirk for DPT volumes. */ 466 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 467 CAM_QUIRK_NOLUNS, 468 /*mintags*/0, /*maxtags*/255 469 }, 470 { 471 /* 472 * Many Sony CDROM drives don't like multi-LUN probing. 473 */ 474 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 475 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 476 }, 477 { 478 /* 479 * This drive doesn't like multiple LUN probing. 480 * Submitted by: Parag Patel <parag@cgt.com> 481 */ 482 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 483 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 484 }, 485 { 486 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 487 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 488 }, 489 { 490 /* 491 * The 8200 doesn't like multi-lun probing, and probably 492 * don't like serial number requests either. 493 */ 494 { 495 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 496 "EXB-8200*", "*" 497 }, 498 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 499 }, 500 { 501 /* 502 * Let's try the same as above, but for a drive that says 503 * it's an IPL-6860 but is actually an EXB 8200. 504 */ 505 { 506 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 507 "IPL-6860*", "*" 508 }, 509 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 510 }, 511 { 512 /* 513 * These Hitachi drives don't like multi-lun probing. 514 * The PR submitter has a DK319H, but says that the Linux 515 * kernel has a similar work-around for the DK312 and DK314, 516 * so all DK31* drives are quirked here. 517 * PR: misc/18793 518 * Submitted by: Paul Haddad <paul@pth.com> 519 */ 520 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 521 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 522 }, 523 { 524 /* 525 * The Hitachi CJ series with J8A8 firmware apparantly has 526 * problems with tagged commands. 527 * PR: 23536 528 * Reported by: amagai@nue.org 529 */ 530 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" }, 531 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 532 }, 533 { 534 /* 535 * These are the large storage arrays. 536 * Submitted by: William Carrel <william.carrel@infospace.com> 537 */ 538 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" }, 539 CAM_QUIRK_HILUNS, 2, 1024 540 }, 541 { 542 /* 543 * This old revision of the TDC3600 is also SCSI-1, and 544 * hangs upon serial number probing. 545 */ 546 { 547 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 548 " TDC 3600", "U07:" 549 }, 550 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 551 }, 552 { 553 /* 554 * Would repond to all LUNs if asked for. 555 */ 556 { 557 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 558 "CP150", "*" 559 }, 560 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 561 }, 562 { 563 /* 564 * Would repond to all LUNs if asked for. 565 */ 566 { 567 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 568 "96X2*", "*" 569 }, 570 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 571 }, 572 { 573 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 574 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 575 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 576 }, 577 { 578 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 579 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 580 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 581 }, 582 { 583 /* TeraSolutions special settings for TRC-22 RAID */ 584 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 585 /*quirks*/0, /*mintags*/55, /*maxtags*/255 586 }, 587 { 588 /* Veritas Storage Appliance */ 589 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 590 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 591 }, 592 { 593 /* 594 * Would respond to all LUNs. Device type and removable 595 * flag are jumper-selectable. 596 */ 597 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 598 "Tahiti 1", "*" 599 }, 600 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 601 }, 602 { 603 /* EasyRAID E5A aka. areca ARC-6010 */ 604 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" }, 605 CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255 606 }, 607 { 608 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" }, 609 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 610 }, 611 { 612 /* Default tagged queuing parameters for all devices */ 613 { 614 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 615 /*vendor*/"*", /*product*/"*", /*revision*/"*" 616 }, 617 /*quirks*/0, /*mintags*/2, /*maxtags*/255 618 }, 619 }; 620 621 static const int xpt_quirk_table_size = 622 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 623 624 typedef enum { 625 DM_RET_COPY = 0x01, 626 DM_RET_FLAG_MASK = 0x0f, 627 DM_RET_NONE = 0x00, 628 DM_RET_STOP = 0x10, 629 DM_RET_DESCEND = 0x20, 630 DM_RET_ERROR = 0x30, 631 DM_RET_ACTION_MASK = 0xf0 632 } dev_match_ret; 633 634 typedef enum { 635 XPT_DEPTH_BUS, 636 XPT_DEPTH_TARGET, 637 XPT_DEPTH_DEVICE, 638 XPT_DEPTH_PERIPH 639 } xpt_traverse_depth; 640 641 struct xpt_traverse_config { 642 xpt_traverse_depth depth; 643 void *tr_func; 644 void *tr_arg; 645 }; 646 647 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 648 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 649 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 650 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 651 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 652 653 /* Transport layer configuration information */ 654 static struct xpt_softc xsoftc; 655 656 /* Queues for our software interrupt handler */ 657 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 658 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 659 static cam_simq_t cam_simq; 660 static struct spinlock cam_simq_spin; 661 662 struct cam_periph *xpt_periph; 663 664 static periph_init_t xpt_periph_init; 665 666 static periph_init_t probe_periph_init; 667 668 static struct periph_driver xpt_driver = 669 { 670 xpt_periph_init, "xpt", 671 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 672 }; 673 674 static struct periph_driver probe_driver = 675 { 676 probe_periph_init, "probe", 677 TAILQ_HEAD_INITIALIZER(probe_driver.units) 678 }; 679 680 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 681 PERIPHDRIVER_DECLARE(probe, probe_driver); 682 683 #define XPT_CDEV_MAJOR 104 684 685 static d_open_t xptopen; 686 static d_close_t xptclose; 687 static d_ioctl_t xptioctl; 688 689 static struct dev_ops xpt_ops = { 690 { "xpt", XPT_CDEV_MAJOR, 0 }, 691 .d_open = xptopen, 692 .d_close = xptclose, 693 .d_ioctl = xptioctl 694 }; 695 696 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb); 697 static void dead_sim_poll(struct cam_sim *sim); 698 699 /* Dummy SIM that is used when the real one has gone. */ 700 static struct cam_sim cam_dead_sim; 701 static struct lock cam_dead_lock; 702 703 /* Storage for debugging datastructures */ 704 #ifdef CAMDEBUG 705 struct cam_path *cam_dpath; 706 u_int32_t cam_dflags; 707 u_int32_t cam_debug_delay; 708 #endif 709 710 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 711 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 712 #endif 713 714 /* 715 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 716 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 717 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 718 */ 719 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 720 || defined(CAM_DEBUG_LUN) 721 #ifdef CAMDEBUG 722 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 723 || !defined(CAM_DEBUG_LUN) 724 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 725 and CAM_DEBUG_LUN" 726 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 727 #else /* !CAMDEBUG */ 728 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 729 #endif /* CAMDEBUG */ 730 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 731 732 /* Our boot-time initialization hook */ 733 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 734 735 static moduledata_t cam_moduledata = { 736 "cam", 737 cam_module_event_handler, 738 NULL 739 }; 740 741 static int xpt_init(void *); 742 743 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 744 MODULE_VERSION(cam, 1); 745 746 747 static cam_status xpt_compile_path(struct cam_path *new_path, 748 struct cam_periph *perph, 749 path_id_t path_id, 750 target_id_t target_id, 751 lun_id_t lun_id); 752 753 static void xpt_release_path(struct cam_path *path); 754 755 static void xpt_async_bcast(struct async_list *async_head, 756 u_int32_t async_code, 757 struct cam_path *path, 758 void *async_arg); 759 static void xpt_dev_async(u_int32_t async_code, 760 struct cam_eb *bus, 761 struct cam_et *target, 762 struct cam_ed *device, 763 void *async_arg); 764 static path_id_t xptnextfreepathid(void); 765 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 766 static union ccb *xpt_get_ccb(struct cam_ed *device); 767 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 768 u_int32_t new_priority); 769 static void xpt_run_dev_allocq(struct cam_eb *bus); 770 static void xpt_run_dev_sendq(struct cam_eb *bus); 771 static timeout_t xpt_release_devq_timeout; 772 static void xpt_release_bus(struct cam_eb *bus); 773 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 774 int run_queue); 775 static struct cam_et* 776 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 777 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 778 static struct cam_ed* 779 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 780 lun_id_t lun_id); 781 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 782 struct cam_ed *device); 783 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 784 static struct cam_eb* 785 xpt_find_bus(path_id_t path_id); 786 static struct cam_et* 787 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 788 static struct cam_ed* 789 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 790 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 791 static void xpt_scan_lun(struct cam_periph *periph, 792 struct cam_path *path, cam_flags flags, 793 union ccb *ccb); 794 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 795 static xpt_busfunc_t xptconfigbuscountfunc; 796 static xpt_busfunc_t xptconfigfunc; 797 static void xpt_config(void *arg); 798 static xpt_devicefunc_t xptpassannouncefunc; 799 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 800 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 801 static void xptpoll(struct cam_sim *sim); 802 static inthand2_t swi_cambio; 803 static void camisr(void *); 804 static void camisr_runqueue(struct cam_sim *); 805 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 806 u_int num_patterns, struct cam_eb *bus); 807 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 808 u_int num_patterns, 809 struct cam_ed *device); 810 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 811 u_int num_patterns, 812 struct cam_periph *periph); 813 static xpt_busfunc_t xptedtbusfunc; 814 static xpt_targetfunc_t xptedttargetfunc; 815 static xpt_devicefunc_t xptedtdevicefunc; 816 static xpt_periphfunc_t xptedtperiphfunc; 817 static xpt_pdrvfunc_t xptplistpdrvfunc; 818 static xpt_periphfunc_t xptplistperiphfunc; 819 static int xptedtmatch(struct ccb_dev_match *cdm); 820 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 821 static int xptbustraverse(struct cam_eb *start_bus, 822 xpt_busfunc_t *tr_func, void *arg); 823 static int xpttargettraverse(struct cam_eb *bus, 824 struct cam_et *start_target, 825 xpt_targetfunc_t *tr_func, void *arg); 826 static int xptdevicetraverse(struct cam_et *target, 827 struct cam_ed *start_device, 828 xpt_devicefunc_t *tr_func, void *arg); 829 static int xptperiphtraverse(struct cam_ed *device, 830 struct cam_periph *start_periph, 831 xpt_periphfunc_t *tr_func, void *arg); 832 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 833 xpt_pdrvfunc_t *tr_func, void *arg); 834 static int xptpdperiphtraverse(struct periph_driver **pdrv, 835 struct cam_periph *start_periph, 836 xpt_periphfunc_t *tr_func, 837 void *arg); 838 static xpt_busfunc_t xptdefbusfunc; 839 static xpt_targetfunc_t xptdeftargetfunc; 840 static xpt_devicefunc_t xptdefdevicefunc; 841 static xpt_periphfunc_t xptdefperiphfunc; 842 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 843 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 844 void *arg); 845 static xpt_devicefunc_t xptsetasyncfunc; 846 static xpt_busfunc_t xptsetasyncbusfunc; 847 static cam_status xptregister(struct cam_periph *periph, 848 void *arg); 849 static cam_status proberegister(struct cam_periph *periph, 850 void *arg); 851 static void probeschedule(struct cam_periph *probe_periph); 852 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 853 static void proberequestdefaultnegotiation(struct cam_periph *periph); 854 static int proberequestbackoff(struct cam_periph *periph, 855 struct cam_ed *device); 856 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 857 static void probecleanup(struct cam_periph *periph); 858 static void xpt_find_quirk(struct cam_ed *device); 859 static void xpt_devise_transport(struct cam_path *path); 860 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 861 struct cam_ed *device, 862 int async_update); 863 static void xpt_toggle_tags(struct cam_path *path); 864 static void xpt_start_tags(struct cam_path *path); 865 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 866 struct cam_ed *dev); 867 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 868 struct cam_ed *dev); 869 static __inline int periph_is_queued(struct cam_periph *periph); 870 static __inline int device_is_alloc_queued(struct cam_ed *device); 871 static __inline int device_is_send_queued(struct cam_ed *device); 872 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 873 874 static __inline int 875 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 876 { 877 int retval; 878 879 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 880 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 881 cam_ccbq_resize(&dev->ccbq, 882 dev->ccbq.dev_openings 883 + dev->ccbq.dev_active); 884 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 885 } 886 /* 887 * The priority of a device waiting for CCB resources 888 * is that of the the highest priority peripheral driver 889 * enqueued. 890 */ 891 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 892 &dev->alloc_ccb_entry.pinfo, 893 CAMQ_GET_HEAD(&dev->drvq)->priority); 894 } else { 895 retval = 0; 896 } 897 898 return (retval); 899 } 900 901 static __inline int 902 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 903 { 904 int retval; 905 906 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 907 /* 908 * The priority of a device waiting for controller 909 * resources is that of the the highest priority CCB 910 * enqueued. 911 */ 912 retval = 913 xpt_schedule_dev(&bus->sim->devq->send_queue, 914 &dev->send_ccb_entry.pinfo, 915 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 916 } else { 917 retval = 0; 918 } 919 return (retval); 920 } 921 922 static __inline int 923 periph_is_queued(struct cam_periph *periph) 924 { 925 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 926 } 927 928 static __inline int 929 device_is_alloc_queued(struct cam_ed *device) 930 { 931 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 932 } 933 934 static __inline int 935 device_is_send_queued(struct cam_ed *device) 936 { 937 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 938 } 939 940 static __inline int 941 dev_allocq_is_runnable(struct cam_devq *devq) 942 { 943 /* 944 * Have work to do. 945 * Have space to do more work. 946 * Allowed to do work. 947 */ 948 return ((devq->alloc_queue.qfrozen_cnt == 0) 949 && (devq->alloc_queue.entries > 0) 950 && (devq->alloc_openings > 0)); 951 } 952 953 static void 954 xpt_periph_init(void) 955 { 956 dev_ops_add(&xpt_ops, 0, 0); 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 task = (struct xpt_task *)context; 2936 cur_entry = (struct async_node *)task->data1; 2937 added = task->data2; 2938 2939 if ((added & AC_FOUND_DEVICE) != 0) { 2940 /* 2941 * Get this peripheral up to date with all 2942 * the currently existing devices. 2943 */ 2944 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 2945 } 2946 if ((added & AC_PATH_REGISTERED) != 0) { 2947 /* 2948 * Get this peripheral up to date with all 2949 * the currently existing busses. 2950 */ 2951 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 2952 } 2953 2954 kfree(task, M_CAMXPT); 2955 } 2956 2957 void 2958 xpt_action(union ccb *start_ccb) 2959 { 2960 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2961 2962 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2963 2964 switch (start_ccb->ccb_h.func_code) { 2965 case XPT_SCSI_IO: 2966 { 2967 struct cam_ed *device; 2968 #ifdef CAMDEBUG 2969 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2970 struct cam_path *path; 2971 2972 path = start_ccb->ccb_h.path; 2973 #endif 2974 2975 /* 2976 * For the sake of compatibility with SCSI-1 2977 * devices that may not understand the identify 2978 * message, we include lun information in the 2979 * second byte of all commands. SCSI-1 specifies 2980 * that luns are a 3 bit value and reserves only 3 2981 * bits for lun information in the CDB. Later 2982 * revisions of the SCSI spec allow for more than 8 2983 * luns, but have deprecated lun information in the 2984 * CDB. So, if the lun won't fit, we must omit. 2985 * 2986 * Also be aware that during initial probing for devices, 2987 * the inquiry information is unknown but initialized to 0. 2988 * This means that this code will be exercised while probing 2989 * devices with an ANSI revision greater than 2. 2990 */ 2991 device = start_ccb->ccb_h.path->device; 2992 if (device->protocol_version <= SCSI_REV_2 2993 && start_ccb->ccb_h.target_lun < 8 2994 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2995 2996 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2997 start_ccb->ccb_h.target_lun << 5; 2998 } 2999 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 3000 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 3001 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 3002 &path->device->inq_data), 3003 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 3004 cdb_str, sizeof(cdb_str)))); 3005 /* FALLTHROUGH */ 3006 } 3007 case XPT_TARGET_IO: 3008 case XPT_CONT_TARGET_IO: 3009 start_ccb->csio.sense_resid = 0; 3010 start_ccb->csio.resid = 0; 3011 /* FALLTHROUGH */ 3012 case XPT_RESET_DEV: 3013 case XPT_ENG_EXEC: 3014 { 3015 struct cam_path *path; 3016 struct cam_sim *sim; 3017 int runq; 3018 3019 path = start_ccb->ccb_h.path; 3020 3021 sim = path->bus->sim; 3022 if (sim == &cam_dead_sim) { 3023 /* The SIM has gone; just execute the CCB directly. */ 3024 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); 3025 (*(sim->sim_action))(sim, start_ccb); 3026 break; 3027 } 3028 3029 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 3030 if (path->device->qfrozen_cnt == 0) 3031 runq = xpt_schedule_dev_sendq(path->bus, path->device); 3032 else 3033 runq = 0; 3034 if (runq != 0) 3035 xpt_run_dev_sendq(path->bus); 3036 break; 3037 } 3038 case XPT_SET_TRAN_SETTINGS: 3039 { 3040 xpt_set_transfer_settings(&start_ccb->cts, 3041 start_ccb->ccb_h.path->device, 3042 /*async_update*/FALSE); 3043 break; 3044 } 3045 case XPT_CALC_GEOMETRY: 3046 { 3047 struct cam_sim *sim; 3048 3049 /* Filter out garbage */ 3050 if (start_ccb->ccg.block_size == 0 3051 || start_ccb->ccg.volume_size == 0) { 3052 start_ccb->ccg.cylinders = 0; 3053 start_ccb->ccg.heads = 0; 3054 start_ccb->ccg.secs_per_track = 0; 3055 start_ccb->ccb_h.status = CAM_REQ_CMP; 3056 break; 3057 } 3058 sim = start_ccb->ccb_h.path->bus->sim; 3059 (*(sim->sim_action))(sim, start_ccb); 3060 break; 3061 } 3062 case XPT_ABORT: 3063 { 3064 union ccb* abort_ccb; 3065 3066 abort_ccb = start_ccb->cab.abort_ccb; 3067 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 3068 3069 if (abort_ccb->ccb_h.pinfo.index >= 0) { 3070 struct cam_ccbq *ccbq; 3071 3072 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3073 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3074 abort_ccb->ccb_h.status = 3075 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3076 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3077 xpt_done(abort_ccb); 3078 start_ccb->ccb_h.status = CAM_REQ_CMP; 3079 break; 3080 } 3081 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3082 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3083 /* 3084 * We've caught this ccb en route to 3085 * the SIM. Flag it for abort and the 3086 * SIM will do so just before starting 3087 * real work on the CCB. 3088 */ 3089 abort_ccb->ccb_h.status = 3090 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3091 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3092 start_ccb->ccb_h.status = CAM_REQ_CMP; 3093 break; 3094 } 3095 } 3096 if (XPT_FC_IS_QUEUED(abort_ccb) 3097 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3098 /* 3099 * It's already completed but waiting 3100 * for our SWI to get to it. 3101 */ 3102 start_ccb->ccb_h.status = CAM_UA_ABORT; 3103 break; 3104 } 3105 /* 3106 * If we weren't able to take care of the abort request 3107 * in the XPT, pass the request down to the SIM for processing. 3108 */ 3109 /* FALLTHROUGH */ 3110 } 3111 case XPT_ACCEPT_TARGET_IO: 3112 case XPT_EN_LUN: 3113 case XPT_IMMED_NOTIFY: 3114 case XPT_NOTIFY_ACK: 3115 case XPT_GET_TRAN_SETTINGS: 3116 case XPT_RESET_BUS: 3117 { 3118 struct cam_sim *sim; 3119 3120 sim = start_ccb->ccb_h.path->bus->sim; 3121 (*(sim->sim_action))(sim, start_ccb); 3122 break; 3123 } 3124 case XPT_PATH_INQ: 3125 { 3126 struct cam_sim *sim; 3127 3128 sim = start_ccb->ccb_h.path->bus->sim; 3129 (*(sim->sim_action))(sim, start_ccb); 3130 break; 3131 } 3132 case XPT_PATH_STATS: 3133 start_ccb->cpis.last_reset = 3134 start_ccb->ccb_h.path->bus->last_reset; 3135 start_ccb->ccb_h.status = CAM_REQ_CMP; 3136 break; 3137 case XPT_GDEV_TYPE: 3138 { 3139 struct cam_ed *dev; 3140 3141 dev = start_ccb->ccb_h.path->device; 3142 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3143 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3144 } else { 3145 struct ccb_getdev *cgd; 3146 struct cam_eb *bus; 3147 struct cam_et *tar; 3148 3149 cgd = &start_ccb->cgd; 3150 bus = cgd->ccb_h.path->bus; 3151 tar = cgd->ccb_h.path->target; 3152 cgd->inq_data = dev->inq_data; 3153 cgd->ccb_h.status = CAM_REQ_CMP; 3154 cgd->serial_num_len = dev->serial_num_len; 3155 if ((dev->serial_num_len > 0) 3156 && (dev->serial_num != NULL)) 3157 bcopy(dev->serial_num, cgd->serial_num, 3158 dev->serial_num_len); 3159 } 3160 break; 3161 } 3162 case XPT_GDEV_STATS: 3163 { 3164 struct cam_ed *dev; 3165 3166 dev = start_ccb->ccb_h.path->device; 3167 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3168 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3169 } else { 3170 struct ccb_getdevstats *cgds; 3171 struct cam_eb *bus; 3172 struct cam_et *tar; 3173 3174 cgds = &start_ccb->cgds; 3175 bus = cgds->ccb_h.path->bus; 3176 tar = cgds->ccb_h.path->target; 3177 cgds->dev_openings = dev->ccbq.dev_openings; 3178 cgds->dev_active = dev->ccbq.dev_active; 3179 cgds->devq_openings = dev->ccbq.devq_openings; 3180 cgds->devq_queued = dev->ccbq.queue.entries; 3181 cgds->held = dev->ccbq.held; 3182 cgds->last_reset = tar->last_reset; 3183 cgds->maxtags = dev->quirk->maxtags; 3184 cgds->mintags = dev->quirk->mintags; 3185 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3186 cgds->last_reset = bus->last_reset; 3187 cgds->ccb_h.status = CAM_REQ_CMP; 3188 } 3189 break; 3190 } 3191 case XPT_GDEVLIST: 3192 { 3193 struct cam_periph *nperiph; 3194 struct periph_list *periph_head; 3195 struct ccb_getdevlist *cgdl; 3196 u_int i; 3197 struct cam_ed *device; 3198 int found; 3199 3200 3201 found = 0; 3202 3203 /* 3204 * Don't want anyone mucking with our data. 3205 */ 3206 device = start_ccb->ccb_h.path->device; 3207 periph_head = &device->periphs; 3208 cgdl = &start_ccb->cgdl; 3209 3210 /* 3211 * Check and see if the list has changed since the user 3212 * last requested a list member. If so, tell them that the 3213 * list has changed, and therefore they need to start over 3214 * from the beginning. 3215 */ 3216 if ((cgdl->index != 0) && 3217 (cgdl->generation != device->generation)) { 3218 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3219 break; 3220 } 3221 3222 /* 3223 * Traverse the list of peripherals and attempt to find 3224 * the requested peripheral. 3225 */ 3226 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3227 (nperiph != NULL) && (i <= cgdl->index); 3228 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3229 if (i == cgdl->index) { 3230 strncpy(cgdl->periph_name, 3231 nperiph->periph_name, 3232 DEV_IDLEN); 3233 cgdl->unit_number = nperiph->unit_number; 3234 found = 1; 3235 } 3236 } 3237 if (found == 0) { 3238 cgdl->status = CAM_GDEVLIST_ERROR; 3239 break; 3240 } 3241 3242 if (nperiph == NULL) 3243 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3244 else 3245 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3246 3247 cgdl->index++; 3248 cgdl->generation = device->generation; 3249 3250 cgdl->ccb_h.status = CAM_REQ_CMP; 3251 break; 3252 } 3253 case XPT_DEV_MATCH: 3254 { 3255 dev_pos_type position_type; 3256 struct ccb_dev_match *cdm; 3257 int ret; 3258 3259 cdm = &start_ccb->cdm; 3260 3261 /* 3262 * There are two ways of getting at information in the EDT. 3263 * The first way is via the primary EDT tree. It starts 3264 * with a list of busses, then a list of targets on a bus, 3265 * then devices/luns on a target, and then peripherals on a 3266 * device/lun. The "other" way is by the peripheral driver 3267 * lists. The peripheral driver lists are organized by 3268 * peripheral driver. (obviously) So it makes sense to 3269 * use the peripheral driver list if the user is looking 3270 * for something like "da1", or all "da" devices. If the 3271 * user is looking for something on a particular bus/target 3272 * or lun, it's generally better to go through the EDT tree. 3273 */ 3274 3275 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3276 position_type = cdm->pos.position_type; 3277 else { 3278 u_int i; 3279 3280 position_type = CAM_DEV_POS_NONE; 3281 3282 for (i = 0; i < cdm->num_patterns; i++) { 3283 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3284 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3285 position_type = CAM_DEV_POS_EDT; 3286 break; 3287 } 3288 } 3289 3290 if (cdm->num_patterns == 0) 3291 position_type = CAM_DEV_POS_EDT; 3292 else if (position_type == CAM_DEV_POS_NONE) 3293 position_type = CAM_DEV_POS_PDRV; 3294 } 3295 3296 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3297 case CAM_DEV_POS_EDT: 3298 ret = xptedtmatch(cdm); 3299 break; 3300 case CAM_DEV_POS_PDRV: 3301 ret = xptperiphlistmatch(cdm); 3302 break; 3303 default: 3304 cdm->status = CAM_DEV_MATCH_ERROR; 3305 break; 3306 } 3307 3308 if (cdm->status == CAM_DEV_MATCH_ERROR) 3309 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3310 else 3311 start_ccb->ccb_h.status = CAM_REQ_CMP; 3312 3313 break; 3314 } 3315 case XPT_SASYNC_CB: 3316 { 3317 struct ccb_setasync *csa; 3318 struct async_node *cur_entry; 3319 struct async_list *async_head; 3320 u_int32_t added; 3321 3322 csa = &start_ccb->csa; 3323 added = csa->event_enable; 3324 async_head = &csa->ccb_h.path->device->asyncs; 3325 3326 /* 3327 * If there is already an entry for us, simply 3328 * update it. 3329 */ 3330 cur_entry = SLIST_FIRST(async_head); 3331 while (cur_entry != NULL) { 3332 if ((cur_entry->callback_arg == csa->callback_arg) 3333 && (cur_entry->callback == csa->callback)) 3334 break; 3335 cur_entry = SLIST_NEXT(cur_entry, links); 3336 } 3337 3338 if (cur_entry != NULL) { 3339 /* 3340 * If the request has no flags set, 3341 * remove the entry. 3342 */ 3343 added &= ~cur_entry->event_enable; 3344 if (csa->event_enable == 0) { 3345 SLIST_REMOVE(async_head, cur_entry, 3346 async_node, links); 3347 csa->ccb_h.path->device->refcount--; 3348 kfree(cur_entry, M_CAMXPT); 3349 } else { 3350 cur_entry->event_enable = csa->event_enable; 3351 } 3352 } else { 3353 cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, 3354 M_INTWAIT); 3355 cur_entry->event_enable = csa->event_enable; 3356 cur_entry->callback_arg = csa->callback_arg; 3357 cur_entry->callback = csa->callback; 3358 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3359 csa->ccb_h.path->device->refcount++; 3360 } 3361 3362 /* 3363 * Need to decouple this operation via a taskqueue so that 3364 * the locking doesn't become a mess. 3365 */ 3366 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 3367 struct xpt_task *task; 3368 3369 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 3370 M_INTWAIT); 3371 3372 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 3373 task->data1 = cur_entry; 3374 task->data2 = added; 3375 taskqueue_enqueue(taskqueue_thread[mycpuid], 3376 &task->task); 3377 } 3378 3379 start_ccb->ccb_h.status = CAM_REQ_CMP; 3380 break; 3381 } 3382 case XPT_REL_SIMQ: 3383 { 3384 struct ccb_relsim *crs; 3385 struct cam_ed *dev; 3386 3387 crs = &start_ccb->crs; 3388 dev = crs->ccb_h.path->device; 3389 if (dev == NULL) { 3390 3391 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3392 break; 3393 } 3394 3395 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3396 3397 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 3398 /* Don't ever go below one opening */ 3399 if (crs->openings > 0) { 3400 xpt_dev_ccbq_resize(crs->ccb_h.path, 3401 crs->openings); 3402 3403 if (bootverbose) { 3404 xpt_print(crs->ccb_h.path, 3405 "tagged openings now %d\n", 3406 crs->openings); 3407 } 3408 } 3409 } 3410 } 3411 3412 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3413 3414 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3415 3416 /* 3417 * Just extend the old timeout and decrement 3418 * the freeze count so that a single timeout 3419 * is sufficient for releasing the queue. 3420 */ 3421 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3422 callout_stop(&dev->callout); 3423 } else { 3424 3425 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3426 } 3427 3428 callout_reset(&dev->callout, 3429 (crs->release_timeout * hz) / 1000, 3430 xpt_release_devq_timeout, dev); 3431 3432 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3433 3434 } 3435 3436 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3437 3438 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3439 /* 3440 * Decrement the freeze count so that a single 3441 * completion is still sufficient to unfreeze 3442 * the queue. 3443 */ 3444 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3445 } else { 3446 3447 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3448 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3449 } 3450 } 3451 3452 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3453 3454 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3455 || (dev->ccbq.dev_active == 0)) { 3456 3457 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3458 } else { 3459 3460 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3461 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3462 } 3463 } 3464 3465 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3466 3467 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3468 /*run_queue*/TRUE); 3469 } 3470 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3471 start_ccb->ccb_h.status = CAM_REQ_CMP; 3472 break; 3473 } 3474 case XPT_SCAN_BUS: 3475 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3476 break; 3477 case XPT_SCAN_LUN: 3478 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3479 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3480 start_ccb); 3481 break; 3482 case XPT_DEBUG: { 3483 #ifdef CAMDEBUG 3484 #ifdef CAM_DEBUG_DELAY 3485 cam_debug_delay = CAM_DEBUG_DELAY; 3486 #endif 3487 cam_dflags = start_ccb->cdbg.flags; 3488 if (cam_dpath != NULL) { 3489 xpt_free_path(cam_dpath); 3490 cam_dpath = NULL; 3491 } 3492 3493 if (cam_dflags != CAM_DEBUG_NONE) { 3494 if (xpt_create_path(&cam_dpath, xpt_periph, 3495 start_ccb->ccb_h.path_id, 3496 start_ccb->ccb_h.target_id, 3497 start_ccb->ccb_h.target_lun) != 3498 CAM_REQ_CMP) { 3499 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3500 cam_dflags = CAM_DEBUG_NONE; 3501 } else { 3502 start_ccb->ccb_h.status = CAM_REQ_CMP; 3503 xpt_print(cam_dpath, "debugging flags now %x\n", 3504 cam_dflags); 3505 } 3506 } else { 3507 cam_dpath = NULL; 3508 start_ccb->ccb_h.status = CAM_REQ_CMP; 3509 } 3510 #else /* !CAMDEBUG */ 3511 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3512 #endif /* CAMDEBUG */ 3513 break; 3514 } 3515 case XPT_NOOP: 3516 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3517 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3518 start_ccb->ccb_h.status = CAM_REQ_CMP; 3519 break; 3520 default: 3521 case XPT_SDEV_TYPE: 3522 case XPT_TERM_IO: 3523 case XPT_ENG_INQ: 3524 /* XXX Implement */ 3525 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3526 break; 3527 } 3528 } 3529 3530 void 3531 xpt_polled_action(union ccb *start_ccb) 3532 { 3533 u_int32_t timeout; 3534 struct cam_sim *sim; 3535 struct cam_devq *devq; 3536 struct cam_ed *dev; 3537 3538 timeout = start_ccb->ccb_h.timeout; 3539 sim = start_ccb->ccb_h.path->bus->sim; 3540 devq = sim->devq; 3541 dev = start_ccb->ccb_h.path->device; 3542 3543 sim_lock_assert_owned(sim->lock); 3544 3545 /* 3546 * Steal an opening so that no other queued requests 3547 * can get it before us while we simulate interrupts. 3548 */ 3549 dev->ccbq.devq_openings--; 3550 dev->ccbq.dev_openings--; 3551 3552 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3553 && (--timeout > 0)) { 3554 DELAY(1000); 3555 (*(sim->sim_poll))(sim); 3556 camisr_runqueue(sim); 3557 } 3558 3559 dev->ccbq.devq_openings++; 3560 dev->ccbq.dev_openings++; 3561 3562 if (timeout != 0) { 3563 xpt_action(start_ccb); 3564 while(--timeout > 0) { 3565 (*(sim->sim_poll))(sim); 3566 camisr_runqueue(sim); 3567 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3568 != CAM_REQ_INPROG) 3569 break; 3570 DELAY(1000); 3571 } 3572 if (timeout == 0) { 3573 /* 3574 * XXX Is it worth adding a sim_timeout entry 3575 * point so we can attempt recovery? If 3576 * this is only used for dumps, I don't think 3577 * it is. 3578 */ 3579 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3580 } 3581 } else { 3582 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3583 } 3584 } 3585 3586 /* 3587 * Schedule a peripheral driver to receive a ccb when it's 3588 * target device has space for more transactions. 3589 */ 3590 void 3591 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3592 { 3593 struct cam_ed *device; 3594 union ccb *work_ccb; 3595 int runq; 3596 3597 sim_lock_assert_owned(perph->sim->lock); 3598 3599 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3600 device = perph->path->device; 3601 if (periph_is_queued(perph)) { 3602 /* Simply reorder based on new priority */ 3603 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3604 (" change priority to %d\n", new_priority)); 3605 if (new_priority < perph->pinfo.priority) { 3606 camq_change_priority(&device->drvq, 3607 perph->pinfo.index, 3608 new_priority); 3609 } 3610 runq = 0; 3611 } else if (perph->path->bus->sim == &cam_dead_sim) { 3612 /* The SIM is gone so just call periph_start directly. */ 3613 work_ccb = xpt_get_ccb(perph->path->device); 3614 if (work_ccb == NULL) 3615 return; /* XXX */ 3616 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); 3617 perph->pinfo.priority = new_priority; 3618 perph->periph_start(perph, work_ccb); 3619 return; 3620 } else { 3621 /* New entry on the queue */ 3622 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3623 (" added periph to queue\n")); 3624 perph->pinfo.priority = new_priority; 3625 perph->pinfo.generation = ++device->drvq.generation; 3626 camq_insert(&device->drvq, &perph->pinfo); 3627 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3628 } 3629 if (runq != 0) { 3630 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3631 (" calling xpt_run_devq\n")); 3632 xpt_run_dev_allocq(perph->path->bus); 3633 } 3634 } 3635 3636 3637 /* 3638 * Schedule a device to run on a given queue. 3639 * If the device was inserted as a new entry on the queue, 3640 * return 1 meaning the device queue should be run. If we 3641 * were already queued, implying someone else has already 3642 * started the queue, return 0 so the caller doesn't attempt 3643 * to run the queue. 3644 */ 3645 static int 3646 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3647 u_int32_t new_priority) 3648 { 3649 int retval; 3650 u_int32_t old_priority; 3651 3652 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3653 3654 old_priority = pinfo->priority; 3655 3656 /* 3657 * Are we already queued? 3658 */ 3659 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3660 /* Simply reorder based on new priority */ 3661 if (new_priority < old_priority) { 3662 camq_change_priority(queue, pinfo->index, 3663 new_priority); 3664 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3665 ("changed priority to %d\n", 3666 new_priority)); 3667 } 3668 retval = 0; 3669 } else { 3670 /* New entry on the queue */ 3671 if (new_priority < old_priority) 3672 pinfo->priority = new_priority; 3673 3674 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3675 ("Inserting onto queue\n")); 3676 pinfo->generation = ++queue->generation; 3677 camq_insert(queue, pinfo); 3678 retval = 1; 3679 } 3680 return (retval); 3681 } 3682 3683 static void 3684 xpt_run_dev_allocq(struct cam_eb *bus) 3685 { 3686 struct cam_devq *devq; 3687 3688 if ((devq = bus->sim->devq) == NULL) { 3689 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3690 return; 3691 } 3692 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3693 3694 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3695 (" qfrozen_cnt == 0x%x, entries == %d, " 3696 "openings == %d, active == %d\n", 3697 devq->alloc_queue.qfrozen_cnt, 3698 devq->alloc_queue.entries, 3699 devq->alloc_openings, 3700 devq->alloc_active)); 3701 3702 devq->alloc_queue.qfrozen_cnt++; 3703 while ((devq->alloc_queue.entries > 0) 3704 && (devq->alloc_openings > 0) 3705 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3706 struct cam_ed_qinfo *qinfo; 3707 struct cam_ed *device; 3708 union ccb *work_ccb; 3709 struct cam_periph *drv; 3710 struct camq *drvq; 3711 3712 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3713 CAMQ_HEAD); 3714 device = qinfo->device; 3715 3716 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3717 ("running device %p\n", device)); 3718 3719 drvq = &device->drvq; 3720 3721 #ifdef CAMDEBUG 3722 if (drvq->entries <= 0) { 3723 panic("xpt_run_dev_allocq: " 3724 "Device on queue without any work to do"); 3725 } 3726 #endif 3727 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3728 devq->alloc_openings--; 3729 devq->alloc_active++; 3730 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3731 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3732 drv->pinfo.priority); 3733 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3734 ("calling periph start\n")); 3735 drv->periph_start(drv, work_ccb); 3736 } else { 3737 /* 3738 * Malloc failure in alloc_ccb 3739 */ 3740 /* 3741 * XXX add us to a list to be run from free_ccb 3742 * if we don't have any ccbs active on this 3743 * device queue otherwise we may never get run 3744 * again. 3745 */ 3746 break; 3747 } 3748 3749 if (drvq->entries > 0) { 3750 /* We have more work. Attempt to reschedule */ 3751 xpt_schedule_dev_allocq(bus, device); 3752 } 3753 } 3754 devq->alloc_queue.qfrozen_cnt--; 3755 } 3756 3757 static void 3758 xpt_run_dev_sendq(struct cam_eb *bus) 3759 { 3760 struct cam_devq *devq; 3761 3762 if ((devq = bus->sim->devq) == NULL) { 3763 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3764 return; 3765 } 3766 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3767 3768 devq->send_queue.qfrozen_cnt++; 3769 while ((devq->send_queue.entries > 0) 3770 && (devq->send_openings > 0)) { 3771 struct cam_ed_qinfo *qinfo; 3772 struct cam_ed *device; 3773 union ccb *work_ccb; 3774 struct cam_sim *sim; 3775 3776 if (devq->send_queue.qfrozen_cnt > 1) { 3777 break; 3778 } 3779 3780 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3781 CAMQ_HEAD); 3782 device = qinfo->device; 3783 3784 /* 3785 * If the device has been "frozen", don't attempt 3786 * to run it. 3787 */ 3788 if (device->qfrozen_cnt > 0) { 3789 continue; 3790 } 3791 3792 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3793 ("running device %p\n", device)); 3794 3795 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3796 if (work_ccb == NULL) { 3797 kprintf("device on run queue with no ccbs???\n"); 3798 continue; 3799 } 3800 3801 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3802 3803 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 3804 if (xsoftc.num_highpower <= 0) { 3805 /* 3806 * We got a high power command, but we 3807 * don't have any available slots. Freeze 3808 * the device queue until we have a slot 3809 * available. 3810 */ 3811 device->qfrozen_cnt++; 3812 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3813 &work_ccb->ccb_h, 3814 xpt_links.stqe); 3815 3816 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3817 continue; 3818 } else { 3819 /* 3820 * Consume a high power slot while 3821 * this ccb runs. 3822 */ 3823 xsoftc.num_highpower--; 3824 } 3825 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3826 } 3827 devq->active_dev = device; 3828 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3829 3830 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3831 3832 devq->send_openings--; 3833 devq->send_active++; 3834 3835 if (device->ccbq.queue.entries > 0) 3836 xpt_schedule_dev_sendq(bus, device); 3837 3838 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3839 /* 3840 * The client wants to freeze the queue 3841 * after this CCB is sent. 3842 */ 3843 device->qfrozen_cnt++; 3844 } 3845 3846 /* In Target mode, the peripheral driver knows best... */ 3847 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3848 if ((device->inq_flags & SID_CmdQue) != 0 3849 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3850 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3851 else 3852 /* 3853 * Clear this in case of a retried CCB that 3854 * failed due to a rejected tag. 3855 */ 3856 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3857 } 3858 3859 /* 3860 * Device queues can be shared among multiple sim instances 3861 * that reside on different busses. Use the SIM in the queue 3862 * CCB's path, rather than the one in the bus that was passed 3863 * into this function. 3864 */ 3865 sim = work_ccb->ccb_h.path->bus->sim; 3866 (*(sim->sim_action))(sim, work_ccb); 3867 3868 devq->active_dev = NULL; 3869 } 3870 devq->send_queue.qfrozen_cnt--; 3871 } 3872 3873 /* 3874 * This function merges stuff from the slave ccb into the master ccb, while 3875 * keeping important fields in the master ccb constant. 3876 */ 3877 void 3878 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3879 { 3880 /* 3881 * Pull fields that are valid for peripheral drivers to set 3882 * into the master CCB along with the CCB "payload". 3883 */ 3884 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3885 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3886 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3887 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3888 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3889 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3890 } 3891 3892 void 3893 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3894 { 3895 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3896 callout_init(&ccb_h->timeout_ch); 3897 ccb_h->pinfo.priority = priority; 3898 ccb_h->path = path; 3899 ccb_h->path_id = path->bus->path_id; 3900 if (path->target) 3901 ccb_h->target_id = path->target->target_id; 3902 else 3903 ccb_h->target_id = CAM_TARGET_WILDCARD; 3904 if (path->device) { 3905 ccb_h->target_lun = path->device->lun_id; 3906 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3907 } else { 3908 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3909 } 3910 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3911 ccb_h->flags = 0; 3912 } 3913 3914 /* Path manipulation functions */ 3915 cam_status 3916 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3917 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3918 { 3919 struct cam_path *path; 3920 cam_status status; 3921 3922 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); 3923 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3924 if (status != CAM_REQ_CMP) { 3925 kfree(path, M_CAMXPT); 3926 path = NULL; 3927 } 3928 *new_path_ptr = path; 3929 return (status); 3930 } 3931 3932 cam_status 3933 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3934 struct cam_periph *periph, path_id_t path_id, 3935 target_id_t target_id, lun_id_t lun_id) 3936 { 3937 struct cam_path *path; 3938 struct cam_eb *bus = NULL; 3939 cam_status status; 3940 int need_unlock = 0; 3941 3942 path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3943 3944 if (path_id != CAM_BUS_WILDCARD) { 3945 bus = xpt_find_bus(path_id); 3946 if (bus != NULL) { 3947 need_unlock = 1; 3948 CAM_SIM_LOCK(bus->sim); 3949 } 3950 } 3951 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3952 if (need_unlock) 3953 CAM_SIM_UNLOCK(bus->sim); 3954 if (status != CAM_REQ_CMP) { 3955 kfree(path, M_CAMXPT); 3956 path = NULL; 3957 } 3958 *new_path_ptr = path; 3959 return (status); 3960 } 3961 3962 static cam_status 3963 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3964 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3965 { 3966 struct cam_eb *bus; 3967 struct cam_et *target; 3968 struct cam_ed *device; 3969 cam_status status; 3970 3971 status = CAM_REQ_CMP; /* Completed without error */ 3972 target = NULL; /* Wildcarded */ 3973 device = NULL; /* Wildcarded */ 3974 3975 /* 3976 * We will potentially modify the EDT, so block interrupts 3977 * that may attempt to create cam paths. 3978 */ 3979 bus = xpt_find_bus(path_id); 3980 if (bus == NULL) { 3981 status = CAM_PATH_INVALID; 3982 } else { 3983 target = xpt_find_target(bus, target_id); 3984 if (target == NULL) { 3985 /* Create one */ 3986 struct cam_et *new_target; 3987 3988 new_target = xpt_alloc_target(bus, target_id); 3989 if (new_target == NULL) { 3990 status = CAM_RESRC_UNAVAIL; 3991 } else { 3992 target = new_target; 3993 } 3994 } 3995 if (target != NULL) { 3996 device = xpt_find_device(target, lun_id); 3997 if (device == NULL) { 3998 /* Create one */ 3999 struct cam_ed *new_device; 4000 4001 new_device = xpt_alloc_device(bus, 4002 target, 4003 lun_id); 4004 if (new_device == NULL) { 4005 status = CAM_RESRC_UNAVAIL; 4006 } else { 4007 device = new_device; 4008 } 4009 } 4010 } 4011 } 4012 4013 /* 4014 * Only touch the user's data if we are successful. 4015 */ 4016 if (status == CAM_REQ_CMP) { 4017 new_path->periph = perph; 4018 new_path->bus = bus; 4019 new_path->target = target; 4020 new_path->device = device; 4021 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 4022 } else { 4023 if (device != NULL) 4024 xpt_release_device(bus, target, device); 4025 if (target != NULL) 4026 xpt_release_target(bus, target); 4027 if (bus != NULL) 4028 xpt_release_bus(bus); 4029 } 4030 return (status); 4031 } 4032 4033 static void 4034 xpt_release_path(struct cam_path *path) 4035 { 4036 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 4037 if (path->device != NULL) { 4038 xpt_release_device(path->bus, path->target, path->device); 4039 path->device = NULL; 4040 } 4041 if (path->target != NULL) { 4042 xpt_release_target(path->bus, path->target); 4043 path->target = NULL; 4044 } 4045 if (path->bus != NULL) { 4046 xpt_release_bus(path->bus); 4047 path->bus = NULL; 4048 } 4049 } 4050 4051 void 4052 xpt_free_path(struct cam_path *path) 4053 { 4054 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 4055 xpt_release_path(path); 4056 kfree(path, M_CAMXPT); 4057 } 4058 4059 4060 /* 4061 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 4062 * in path1, 2 for match with wildcards in path2. 4063 */ 4064 int 4065 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 4066 { 4067 int retval = 0; 4068 4069 if (path1->bus != path2->bus) { 4070 if (path1->bus->path_id == CAM_BUS_WILDCARD) 4071 retval = 1; 4072 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 4073 retval = 2; 4074 else 4075 return (-1); 4076 } 4077 if (path1->target != path2->target) { 4078 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 4079 if (retval == 0) 4080 retval = 1; 4081 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 4082 retval = 2; 4083 else 4084 return (-1); 4085 } 4086 if (path1->device != path2->device) { 4087 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4088 if (retval == 0) 4089 retval = 1; 4090 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4091 retval = 2; 4092 else 4093 return (-1); 4094 } 4095 return (retval); 4096 } 4097 4098 void 4099 xpt_print_path(struct cam_path *path) 4100 { 4101 4102 if (path == NULL) 4103 kprintf("(nopath): "); 4104 else { 4105 if (path->periph != NULL) 4106 kprintf("(%s%d:", path->periph->periph_name, 4107 path->periph->unit_number); 4108 else 4109 kprintf("(noperiph:"); 4110 4111 if (path->bus != NULL) 4112 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4113 path->bus->sim->unit_number, 4114 path->bus->sim->bus_id); 4115 else 4116 kprintf("nobus:"); 4117 4118 if (path->target != NULL) 4119 kprintf("%d:", path->target->target_id); 4120 else 4121 kprintf("X:"); 4122 4123 if (path->device != NULL) 4124 kprintf("%d): ", path->device->lun_id); 4125 else 4126 kprintf("X): "); 4127 } 4128 } 4129 4130 void 4131 xpt_print(struct cam_path *path, const char *fmt, ...) 4132 { 4133 __va_list ap; 4134 xpt_print_path(path); 4135 __va_start(ap, fmt); 4136 kvprintf(fmt, ap); 4137 __va_end(ap); 4138 } 4139 4140 int 4141 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4142 { 4143 struct sbuf sb; 4144 4145 sim_lock_assert_owned(path->bus->sim->lock); 4146 4147 sbuf_new(&sb, str, str_len, 0); 4148 4149 if (path == NULL) 4150 sbuf_printf(&sb, "(nopath): "); 4151 else { 4152 if (path->periph != NULL) 4153 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4154 path->periph->unit_number); 4155 else 4156 sbuf_printf(&sb, "(noperiph:"); 4157 4158 if (path->bus != NULL) 4159 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4160 path->bus->sim->unit_number, 4161 path->bus->sim->bus_id); 4162 else 4163 sbuf_printf(&sb, "nobus:"); 4164 4165 if (path->target != NULL) 4166 sbuf_printf(&sb, "%d:", path->target->target_id); 4167 else 4168 sbuf_printf(&sb, "X:"); 4169 4170 if (path->device != NULL) 4171 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4172 else 4173 sbuf_printf(&sb, "X): "); 4174 } 4175 sbuf_finish(&sb); 4176 4177 return(sbuf_len(&sb)); 4178 } 4179 4180 path_id_t 4181 xpt_path_path_id(struct cam_path *path) 4182 { 4183 sim_lock_assert_owned(path->bus->sim->lock); 4184 4185 return(path->bus->path_id); 4186 } 4187 4188 target_id_t 4189 xpt_path_target_id(struct cam_path *path) 4190 { 4191 sim_lock_assert_owned(path->bus->sim->lock); 4192 4193 if (path->target != NULL) 4194 return (path->target->target_id); 4195 else 4196 return (CAM_TARGET_WILDCARD); 4197 } 4198 4199 lun_id_t 4200 xpt_path_lun_id(struct cam_path *path) 4201 { 4202 sim_lock_assert_owned(path->bus->sim->lock); 4203 4204 if (path->device != NULL) 4205 return (path->device->lun_id); 4206 else 4207 return (CAM_LUN_WILDCARD); 4208 } 4209 4210 struct cam_sim * 4211 xpt_path_sim(struct cam_path *path) 4212 { 4213 return (path->bus->sim); 4214 } 4215 4216 struct cam_periph* 4217 xpt_path_periph(struct cam_path *path) 4218 { 4219 sim_lock_assert_owned(path->bus->sim->lock); 4220 4221 return (path->periph); 4222 } 4223 4224 /* 4225 * Release a CAM control block for the caller. Remit the cost of the structure 4226 * to the device referenced by the path. If the this device had no 'credits' 4227 * and peripheral drivers have registered async callbacks for this notification 4228 * call them now. 4229 */ 4230 void 4231 xpt_release_ccb(union ccb *free_ccb) 4232 { 4233 struct cam_path *path; 4234 struct cam_ed *device; 4235 struct cam_eb *bus; 4236 struct cam_sim *sim; 4237 4238 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4239 path = free_ccb->ccb_h.path; 4240 device = path->device; 4241 bus = path->bus; 4242 sim = bus->sim; 4243 4244 sim_lock_assert_owned(sim->lock); 4245 4246 cam_ccbq_release_opening(&device->ccbq); 4247 if (sim->ccb_count > sim->max_ccbs) { 4248 xpt_free_ccb(free_ccb); 4249 sim->ccb_count--; 4250 } else if (sim == &cam_dead_sim) { 4251 xpt_free_ccb(free_ccb); 4252 } else { 4253 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 4254 xpt_links.sle); 4255 } 4256 if (sim->devq == NULL) { 4257 return; 4258 } 4259 sim->devq->alloc_openings++; 4260 sim->devq->alloc_active--; 4261 /* XXX Turn this into an inline function - xpt_run_device?? */ 4262 if ((device_is_alloc_queued(device) == 0) 4263 && (device->drvq.entries > 0)) { 4264 xpt_schedule_dev_allocq(bus, device); 4265 } 4266 if (dev_allocq_is_runnable(sim->devq)) 4267 xpt_run_dev_allocq(bus); 4268 } 4269 4270 /* Functions accessed by SIM drivers */ 4271 4272 /* 4273 * A sim structure, listing the SIM entry points and instance 4274 * identification info is passed to xpt_bus_register to hook the SIM 4275 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4276 * for this new bus and places it in the array of busses and assigns 4277 * it a path_id. The path_id may be influenced by "hard wiring" 4278 * information specified by the user. Once interrupt services are 4279 * availible, the bus will be probed. 4280 */ 4281 int32_t 4282 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4283 { 4284 struct cam_eb *new_bus; 4285 struct cam_eb *old_bus; 4286 struct ccb_pathinq cpi; 4287 4288 sim_lock_assert_owned(sim->lock); 4289 4290 sim->bus_id = bus; 4291 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); 4292 4293 if (strcmp(sim->sim_name, "xpt") != 0) { 4294 sim->path_id = 4295 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4296 } 4297 4298 TAILQ_INIT(&new_bus->et_entries); 4299 new_bus->path_id = sim->path_id; 4300 new_bus->sim = sim; 4301 ++sim->refcount; 4302 timevalclear(&new_bus->last_reset); 4303 new_bus->flags = 0; 4304 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4305 new_bus->generation = 0; 4306 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4307 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4308 while (old_bus != NULL 4309 && old_bus->path_id < new_bus->path_id) 4310 old_bus = TAILQ_NEXT(old_bus, links); 4311 if (old_bus != NULL) 4312 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4313 else 4314 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4315 xsoftc.bus_generation++; 4316 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4317 4318 /* Notify interested parties */ 4319 if (sim->path_id != CAM_XPT_PATH_ID) { 4320 struct cam_path path; 4321 4322 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4323 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4324 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4325 cpi.ccb_h.func_code = XPT_PATH_INQ; 4326 xpt_action((union ccb *)&cpi); 4327 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4328 xpt_release_path(&path); 4329 } 4330 return (CAM_SUCCESS); 4331 } 4332 4333 /* 4334 * Deregister a bus. We must clean out all transactions pending on the bus. 4335 * This routine is typically called prior to cam_sim_free() (e.g. see 4336 * dev/usbmisc/umass/umass.c) 4337 */ 4338 int32_t 4339 xpt_bus_deregister(path_id_t pathid) 4340 { 4341 struct cam_path bus_path; 4342 struct cam_et *target; 4343 struct cam_ed *device; 4344 struct cam_ed_qinfo *qinfo; 4345 struct cam_devq *devq; 4346 struct cam_periph *periph; 4347 struct cam_sim *ccbsim; 4348 union ccb *work_ccb; 4349 cam_status status; 4350 int retries = 0; 4351 4352 status = xpt_compile_path(&bus_path, NULL, pathid, 4353 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4354 if (status != CAM_REQ_CMP) 4355 return (status); 4356 4357 /* 4358 * This should clear out all pending requests and timeouts, but 4359 * the ccb's may be queued to a software interrupt. 4360 * 4361 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4362 * and it really ought to. 4363 */ 4364 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4365 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4366 4367 /* 4368 * Mark the SIM as having been deregistered. This prevents 4369 * certain operations from re-queueing to it, stops new devices 4370 * from being added, etc. 4371 */ 4372 devq = bus_path.bus->sim->devq; 4373 ccbsim = bus_path.bus->sim; 4374 ccbsim->flags |= CAM_SIM_DEREGISTERED; 4375 4376 again: 4377 /* 4378 * Execute any pending operations now. 4379 */ 4380 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 4381 CAMQ_HEAD)) != NULL || 4382 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 4383 CAMQ_HEAD)) != NULL) { 4384 do { 4385 device = qinfo->device; 4386 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 4387 if (work_ccb != NULL) { 4388 devq->active_dev = device; 4389 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 4390 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 4391 (*(ccbsim->sim_action))(ccbsim, work_ccb); 4392 } 4393 4394 periph = (struct cam_periph *)camq_remove(&device->drvq, 4395 CAMQ_HEAD); 4396 if (periph != NULL) 4397 xpt_schedule(periph, periph->pinfo.priority); 4398 } while (work_ccb != NULL || periph != NULL); 4399 } 4400 4401 /* 4402 * Make sure all completed CCBs are processed. 4403 */ 4404 while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { 4405 camisr_runqueue(ccbsim); 4406 } 4407 4408 /* 4409 * Check for requeues, reissues asyncs if necessary 4410 */ 4411 if (CAMQ_GET_HEAD(&devq->send_queue)) 4412 kprintf("camq: devq send_queue still in use (%d entries)\n", 4413 devq->send_queue.entries); 4414 if (CAMQ_GET_HEAD(&devq->alloc_queue)) 4415 kprintf("camq: devq alloc_queue still in use (%d entries)\n", 4416 devq->alloc_queue.entries); 4417 if (CAMQ_GET_HEAD(&devq->send_queue) || 4418 CAMQ_GET_HEAD(&devq->alloc_queue)) { 4419 if (++retries < 5) { 4420 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4421 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4422 goto again; 4423 } 4424 } 4425 4426 /* 4427 * Retarget the bus and all cached sim pointers to dead_sim. 4428 * 4429 * Various CAM subsystems may be holding on to targets, devices, 4430 * and/or peripherals and may attempt to use the sim pointer cached 4431 * in some of these structures during close. 4432 */ 4433 bus_path.bus->sim = &cam_dead_sim; 4434 TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { 4435 TAILQ_FOREACH(device, &target->ed_entries, links) { 4436 device->sim = &cam_dead_sim; 4437 SLIST_FOREACH(periph, &device->periphs, periph_links) { 4438 periph->sim = &cam_dead_sim; 4439 } 4440 } 4441 } 4442 4443 /* 4444 * Repeat the async's for the benefit of any new devices, such as 4445 * might be created from completed probes. Any new device 4446 * ops will run on dead_sim. 4447 * 4448 * XXX There are probably races :-( 4449 */ 4450 CAM_SIM_LOCK(&cam_dead_sim); 4451 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4452 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4453 CAM_SIM_UNLOCK(&cam_dead_sim); 4454 4455 /* Release the reference count held while registered. */ 4456 xpt_release_bus(bus_path.bus); 4457 xpt_release_path(&bus_path); 4458 4459 /* Release the ref we got when the bus was registered */ 4460 cam_sim_release(ccbsim, 0); 4461 4462 return (CAM_REQ_CMP); 4463 } 4464 4465 static path_id_t 4466 xptnextfreepathid(void) 4467 { 4468 struct cam_eb *bus; 4469 path_id_t pathid; 4470 char *strval; 4471 4472 pathid = 0; 4473 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4474 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4475 retry: 4476 /* Find an unoccupied pathid */ 4477 while (bus != NULL && bus->path_id <= pathid) { 4478 if (bus->path_id == pathid) 4479 pathid++; 4480 bus = TAILQ_NEXT(bus, links); 4481 } 4482 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4483 4484 /* 4485 * Ensure that this pathid is not reserved for 4486 * a bus that may be registered in the future. 4487 */ 4488 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4489 ++pathid; 4490 /* Start the search over */ 4491 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4492 goto retry; 4493 } 4494 return (pathid); 4495 } 4496 4497 static path_id_t 4498 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4499 { 4500 path_id_t pathid; 4501 int i, dunit, val; 4502 char buf[32]; 4503 4504 pathid = CAM_XPT_PATH_ID; 4505 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4506 i = -1; 4507 while ((i = resource_query_string(i, "at", buf)) != -1) { 4508 if (strcmp(resource_query_name(i), "scbus")) { 4509 /* Avoid a bit of foot shooting. */ 4510 continue; 4511 } 4512 dunit = resource_query_unit(i); 4513 if (dunit < 0) /* unwired?! */ 4514 continue; 4515 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4516 if (sim_bus == val) { 4517 pathid = dunit; 4518 break; 4519 } 4520 } else if (sim_bus == 0) { 4521 /* Unspecified matches bus 0 */ 4522 pathid = dunit; 4523 break; 4524 } else { 4525 kprintf("Ambiguous scbus configuration for %s%d " 4526 "bus %d, cannot wire down. The kernel " 4527 "config entry for scbus%d should " 4528 "specify a controller bus.\n" 4529 "Scbus will be assigned dynamically.\n", 4530 sim_name, sim_unit, sim_bus, dunit); 4531 break; 4532 } 4533 } 4534 4535 if (pathid == CAM_XPT_PATH_ID) 4536 pathid = xptnextfreepathid(); 4537 return (pathid); 4538 } 4539 4540 void 4541 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4542 { 4543 struct cam_eb *bus; 4544 struct cam_et *target, *next_target; 4545 struct cam_ed *device, *next_device; 4546 4547 sim_lock_assert_owned(path->bus->sim->lock); 4548 4549 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4550 4551 /* 4552 * Most async events come from a CAM interrupt context. In 4553 * a few cases, the error recovery code at the peripheral layer, 4554 * which may run from our SWI or a process context, may signal 4555 * deferred events with a call to xpt_async. 4556 */ 4557 4558 bus = path->bus; 4559 4560 if (async_code == AC_BUS_RESET) { 4561 /* Update our notion of when the last reset occurred */ 4562 microuptime(&bus->last_reset); 4563 } 4564 4565 for (target = TAILQ_FIRST(&bus->et_entries); 4566 target != NULL; 4567 target = next_target) { 4568 4569 next_target = TAILQ_NEXT(target, links); 4570 4571 if (path->target != target 4572 && path->target->target_id != CAM_TARGET_WILDCARD 4573 && target->target_id != CAM_TARGET_WILDCARD) 4574 continue; 4575 4576 if (async_code == AC_SENT_BDR) { 4577 /* Update our notion of when the last reset occurred */ 4578 microuptime(&path->target->last_reset); 4579 } 4580 4581 for (device = TAILQ_FIRST(&target->ed_entries); 4582 device != NULL; 4583 device = next_device) { 4584 4585 next_device = TAILQ_NEXT(device, links); 4586 4587 if (path->device != device 4588 && path->device->lun_id != CAM_LUN_WILDCARD 4589 && device->lun_id != CAM_LUN_WILDCARD) 4590 continue; 4591 4592 xpt_dev_async(async_code, bus, target, 4593 device, async_arg); 4594 4595 xpt_async_bcast(&device->asyncs, async_code, 4596 path, async_arg); 4597 } 4598 } 4599 4600 /* 4601 * If this wasn't a fully wildcarded async, tell all 4602 * clients that want all async events. 4603 */ 4604 if (bus != xpt_periph->path->bus) 4605 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4606 path, async_arg); 4607 } 4608 4609 static void 4610 xpt_async_bcast(struct async_list *async_head, 4611 u_int32_t async_code, 4612 struct cam_path *path, void *async_arg) 4613 { 4614 struct async_node *cur_entry; 4615 4616 cur_entry = SLIST_FIRST(async_head); 4617 while (cur_entry != NULL) { 4618 struct async_node *next_entry; 4619 /* 4620 * Grab the next list entry before we call the current 4621 * entry's callback. This is because the callback function 4622 * can delete its async callback entry. 4623 */ 4624 next_entry = SLIST_NEXT(cur_entry, links); 4625 if ((cur_entry->event_enable & async_code) != 0) 4626 cur_entry->callback(cur_entry->callback_arg, 4627 async_code, path, 4628 async_arg); 4629 cur_entry = next_entry; 4630 } 4631 } 4632 4633 /* 4634 * Handle any per-device event notifications that require action by the XPT. 4635 */ 4636 static void 4637 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4638 struct cam_ed *device, void *async_arg) 4639 { 4640 cam_status status; 4641 struct cam_path newpath; 4642 4643 /* 4644 * We only need to handle events for real devices. 4645 */ 4646 if (target->target_id == CAM_TARGET_WILDCARD 4647 || device->lun_id == CAM_LUN_WILDCARD) 4648 return; 4649 4650 /* 4651 * We need our own path with wildcards expanded to 4652 * handle certain types of events. 4653 */ 4654 if ((async_code == AC_SENT_BDR) 4655 || (async_code == AC_BUS_RESET) 4656 || (async_code == AC_INQ_CHANGED)) 4657 status = xpt_compile_path(&newpath, NULL, 4658 bus->path_id, 4659 target->target_id, 4660 device->lun_id); 4661 else 4662 status = CAM_REQ_CMP_ERR; 4663 4664 if (status == CAM_REQ_CMP) { 4665 4666 /* 4667 * Allow transfer negotiation to occur in a 4668 * tag free environment. 4669 */ 4670 if (async_code == AC_SENT_BDR 4671 || async_code == AC_BUS_RESET) 4672 xpt_toggle_tags(&newpath); 4673 4674 if (async_code == AC_INQ_CHANGED) { 4675 /* 4676 * We've sent a start unit command, or 4677 * something similar to a device that 4678 * may have caused its inquiry data to 4679 * change. So we re-scan the device to 4680 * refresh the inquiry data for it. 4681 */ 4682 xpt_scan_lun(newpath.periph, &newpath, 4683 CAM_EXPECT_INQ_CHANGE, NULL); 4684 } 4685 xpt_release_path(&newpath); 4686 } else if (async_code == AC_LOST_DEVICE) { 4687 /* 4688 * When we lose a device the device may be about to detach 4689 * the sim, we have to clear out all pending timeouts and 4690 * requests before that happens. XXX it would be nice if 4691 * we could abort the requests pertaining to the device. 4692 */ 4693 xpt_release_devq_timeout(device); 4694 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4695 device->flags |= CAM_DEV_UNCONFIGURED; 4696 xpt_release_device(bus, target, device); 4697 } 4698 } else if (async_code == AC_TRANSFER_NEG) { 4699 struct ccb_trans_settings *settings; 4700 4701 settings = (struct ccb_trans_settings *)async_arg; 4702 xpt_set_transfer_settings(settings, device, 4703 /*async_update*/TRUE); 4704 } 4705 } 4706 4707 u_int32_t 4708 xpt_freeze_devq(struct cam_path *path, u_int count) 4709 { 4710 struct ccb_hdr *ccbh; 4711 4712 sim_lock_assert_owned(path->bus->sim->lock); 4713 4714 path->device->qfrozen_cnt += count; 4715 4716 /* 4717 * Mark the last CCB in the queue as needing 4718 * to be requeued if the driver hasn't 4719 * changed it's state yet. This fixes a race 4720 * where a ccb is just about to be queued to 4721 * a controller driver when it's interrupt routine 4722 * freezes the queue. To completly close the 4723 * hole, controller drives must check to see 4724 * if a ccb's status is still CAM_REQ_INPROG 4725 * just before they queue 4726 * the CCB. See ahc_action/ahc_freeze_devq for 4727 * an example. 4728 */ 4729 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4730 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4731 ccbh->status = CAM_REQUEUE_REQ; 4732 return (path->device->qfrozen_cnt); 4733 } 4734 4735 u_int32_t 4736 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4737 { 4738 sim_lock_assert_owned(sim->lock); 4739 4740 if (sim->devq == NULL) 4741 return(count); 4742 sim->devq->send_queue.qfrozen_cnt += count; 4743 if (sim->devq->active_dev != NULL) { 4744 struct ccb_hdr *ccbh; 4745 4746 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4747 ccb_hdr_tailq); 4748 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4749 ccbh->status = CAM_REQUEUE_REQ; 4750 } 4751 return (sim->devq->send_queue.qfrozen_cnt); 4752 } 4753 4754 /* 4755 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4756 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4757 * freed, which is not the case here), but the device queue is also freed XXX 4758 * and we have to check that here. 4759 * 4760 * XXX fixme: could we simply not null-out the device queue via 4761 * cam_sim_free()? 4762 */ 4763 static void 4764 xpt_release_devq_timeout(void *arg) 4765 { 4766 struct cam_ed *device; 4767 4768 device = (struct cam_ed *)arg; 4769 4770 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4771 } 4772 4773 void 4774 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4775 { 4776 sim_lock_assert_owned(path->bus->sim->lock); 4777 4778 xpt_release_devq_device(path->device, count, run_queue); 4779 } 4780 4781 static void 4782 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4783 { 4784 int rundevq; 4785 4786 rundevq = 0; 4787 4788 if (dev->qfrozen_cnt > 0) { 4789 4790 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4791 dev->qfrozen_cnt -= count; 4792 if (dev->qfrozen_cnt == 0) { 4793 4794 /* 4795 * No longer need to wait for a successful 4796 * command completion. 4797 */ 4798 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4799 4800 /* 4801 * Remove any timeouts that might be scheduled 4802 * to release this queue. 4803 */ 4804 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4805 callout_stop(&dev->callout); 4806 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4807 } 4808 4809 /* 4810 * Now that we are unfrozen schedule the 4811 * device so any pending transactions are 4812 * run. 4813 */ 4814 if ((dev->ccbq.queue.entries > 0) 4815 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4816 && (run_queue != 0)) { 4817 rundevq = 1; 4818 } 4819 } 4820 } 4821 if (rundevq != 0) 4822 xpt_run_dev_sendq(dev->target->bus); 4823 } 4824 4825 void 4826 xpt_release_simq(struct cam_sim *sim, int run_queue) 4827 { 4828 struct camq *sendq; 4829 4830 sim_lock_assert_owned(sim->lock); 4831 4832 if (sim->devq == NULL) 4833 return; 4834 4835 sendq = &(sim->devq->send_queue); 4836 if (sendq->qfrozen_cnt > 0) { 4837 sendq->qfrozen_cnt--; 4838 if (sendq->qfrozen_cnt == 0) { 4839 struct cam_eb *bus; 4840 4841 /* 4842 * If there is a timeout scheduled to release this 4843 * sim queue, remove it. The queue frozen count is 4844 * already at 0. 4845 */ 4846 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4847 callout_stop(&sim->callout); 4848 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4849 } 4850 bus = xpt_find_bus(sim->path_id); 4851 4852 if (run_queue) { 4853 /* 4854 * Now that we are unfrozen run the send queue. 4855 */ 4856 xpt_run_dev_sendq(bus); 4857 } 4858 xpt_release_bus(bus); 4859 } 4860 } 4861 } 4862 4863 void 4864 xpt_done(union ccb *done_ccb) 4865 { 4866 struct cam_sim *sim; 4867 4868 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4869 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4870 /* 4871 * Queue up the request for handling by our SWI handler 4872 * any of the "non-immediate" type of ccbs. 4873 */ 4874 sim = done_ccb->ccb_h.path->bus->sim; 4875 switch (done_ccb->ccb_h.path->periph->type) { 4876 case CAM_PERIPH_BIO: 4877 spin_lock_wr(&sim->sim_spin); 4878 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4879 sim_links.tqe); 4880 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4881 spin_unlock_wr(&sim->sim_spin); 4882 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4883 spin_lock_wr(&cam_simq_spin); 4884 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4885 TAILQ_INSERT_TAIL(&cam_simq, sim, 4886 links); 4887 sim->flags |= CAM_SIM_ON_DONEQ; 4888 } 4889 spin_unlock_wr(&cam_simq_spin); 4890 } 4891 if ((done_ccb->ccb_h.flags & CAM_POLLED) == 0) 4892 setsoftcambio(); 4893 break; 4894 default: 4895 panic("unknown periph type %d", 4896 done_ccb->ccb_h.path->periph->type); 4897 } 4898 } 4899 } 4900 4901 union ccb * 4902 xpt_alloc_ccb(void) 4903 { 4904 union ccb *new_ccb; 4905 4906 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); 4907 return (new_ccb); 4908 } 4909 4910 void 4911 xpt_free_ccb(union ccb *free_ccb) 4912 { 4913 kfree(free_ccb, M_CAMXPT); 4914 } 4915 4916 4917 4918 /* Private XPT functions */ 4919 4920 /* 4921 * Get a CAM control block for the caller. Charge the structure to the device 4922 * referenced by the path. If the this device has no 'credits' then the 4923 * device already has the maximum number of outstanding operations under way 4924 * and we return NULL. If we don't have sufficient resources to allocate more 4925 * ccbs, we also return NULL. 4926 */ 4927 static union ccb * 4928 xpt_get_ccb(struct cam_ed *device) 4929 { 4930 union ccb *new_ccb; 4931 struct cam_sim *sim; 4932 4933 sim = device->sim; 4934 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4935 new_ccb = xpt_alloc_ccb(); 4936 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4937 callout_init(&new_ccb->ccb_h.timeout_ch); 4938 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4939 xpt_links.sle); 4940 sim->ccb_count++; 4941 } 4942 cam_ccbq_take_opening(&device->ccbq); 4943 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4944 return (new_ccb); 4945 } 4946 4947 static void 4948 xpt_release_bus(struct cam_eb *bus) 4949 { 4950 4951 if ((--bus->refcount == 0) 4952 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4953 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4954 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4955 xsoftc.bus_generation++; 4956 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4957 kfree(bus, M_CAMXPT); 4958 } 4959 } 4960 4961 static struct cam_et * 4962 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4963 { 4964 struct cam_et *target; 4965 struct cam_et *cur_target; 4966 4967 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); 4968 4969 TAILQ_INIT(&target->ed_entries); 4970 target->bus = bus; 4971 target->target_id = target_id; 4972 target->refcount = 1; 4973 target->generation = 0; 4974 timevalclear(&target->last_reset); 4975 /* 4976 * Hold a reference to our parent bus so it 4977 * will not go away before we do. 4978 */ 4979 bus->refcount++; 4980 4981 /* Insertion sort into our bus's target list */ 4982 cur_target = TAILQ_FIRST(&bus->et_entries); 4983 while (cur_target != NULL && cur_target->target_id < target_id) 4984 cur_target = TAILQ_NEXT(cur_target, links); 4985 4986 if (cur_target != NULL) { 4987 TAILQ_INSERT_BEFORE(cur_target, target, links); 4988 } else { 4989 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4990 } 4991 bus->generation++; 4992 return (target); 4993 } 4994 4995 static void 4996 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4997 { 4998 if (target->refcount == 1) { 4999 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 5000 TAILQ_REMOVE(&bus->et_entries, target, links); 5001 bus->generation++; 5002 xpt_release_bus(bus); 5003 KKASSERT(target->refcount == 1); 5004 kfree(target, M_CAMXPT); 5005 } else { 5006 --target->refcount; 5007 } 5008 } 5009 5010 static struct cam_ed * 5011 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 5012 { 5013 struct cam_path path; 5014 struct cam_ed *device; 5015 struct cam_devq *devq; 5016 cam_status status; 5017 5018 /* 5019 * Disallow new devices while trying to deregister a sim 5020 */ 5021 if (bus->sim->flags & CAM_SIM_DEREGISTERED) 5022 return (NULL); 5023 5024 /* 5025 * Make space for us in the device queue on our bus 5026 */ 5027 devq = bus->sim->devq; 5028 if (devq == NULL) 5029 return(NULL); 5030 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 5031 5032 if (status != CAM_REQ_CMP) { 5033 device = NULL; 5034 } else { 5035 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); 5036 } 5037 5038 if (device != NULL) { 5039 struct cam_ed *cur_device; 5040 5041 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 5042 device->alloc_ccb_entry.device = device; 5043 cam_init_pinfo(&device->send_ccb_entry.pinfo); 5044 device->send_ccb_entry.device = device; 5045 device->target = target; 5046 device->lun_id = lun_id; 5047 device->sim = bus->sim; 5048 /* Initialize our queues */ 5049 if (camq_init(&device->drvq, 0) != 0) { 5050 kfree(device, M_CAMXPT); 5051 return (NULL); 5052 } 5053 if (cam_ccbq_init(&device->ccbq, 5054 bus->sim->max_dev_openings) != 0) { 5055 camq_fini(&device->drvq); 5056 kfree(device, M_CAMXPT); 5057 return (NULL); 5058 } 5059 SLIST_INIT(&device->asyncs); 5060 SLIST_INIT(&device->periphs); 5061 device->generation = 0; 5062 device->owner = NULL; 5063 /* 5064 * Take the default quirk entry until we have inquiry 5065 * data and can determine a better quirk to use. 5066 */ 5067 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 5068 bzero(&device->inq_data, sizeof(device->inq_data)); 5069 device->inq_flags = 0; 5070 device->queue_flags = 0; 5071 device->serial_num = NULL; 5072 device->serial_num_len = 0; 5073 device->qfrozen_cnt = 0; 5074 device->flags = CAM_DEV_UNCONFIGURED; 5075 device->tag_delay_count = 0; 5076 device->tag_saved_openings = 0; 5077 device->refcount = 1; 5078 callout_init(&device->callout); 5079 5080 /* 5081 * Hold a reference to our parent target so it 5082 * will not go away before we do. 5083 */ 5084 target->refcount++; 5085 5086 /* 5087 * XXX should be limited by number of CCBs this bus can 5088 * do. 5089 */ 5090 bus->sim->max_ccbs += device->ccbq.devq_openings; 5091 /* Insertion sort into our target's device list */ 5092 cur_device = TAILQ_FIRST(&target->ed_entries); 5093 while (cur_device != NULL && cur_device->lun_id < lun_id) 5094 cur_device = TAILQ_NEXT(cur_device, links); 5095 if (cur_device != NULL) { 5096 TAILQ_INSERT_BEFORE(cur_device, device, links); 5097 } else { 5098 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 5099 } 5100 target->generation++; 5101 if (lun_id != CAM_LUN_WILDCARD) { 5102 xpt_compile_path(&path, 5103 NULL, 5104 bus->path_id, 5105 target->target_id, 5106 lun_id); 5107 xpt_devise_transport(&path); 5108 xpt_release_path(&path); 5109 } 5110 } 5111 return (device); 5112 } 5113 5114 static void 5115 xpt_reference_device(struct cam_ed *device) 5116 { 5117 ++device->refcount; 5118 } 5119 5120 static void 5121 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 5122 struct cam_ed *device) 5123 { 5124 struct cam_devq *devq; 5125 5126 if (device->refcount == 1) { 5127 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 5128 5129 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 5130 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 5131 panic("Removing device while still queued for ccbs"); 5132 5133 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 5134 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 5135 callout_stop(&device->callout); 5136 } 5137 5138 TAILQ_REMOVE(&target->ed_entries, device,links); 5139 target->generation++; 5140 bus->sim->max_ccbs -= device->ccbq.devq_openings; 5141 if ((devq = bus->sim->devq) != NULL) { 5142 /* Release our slot in the devq */ 5143 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 5144 } 5145 camq_fini(&device->drvq); 5146 camq_fini(&device->ccbq.queue); 5147 xpt_release_target(bus, target); 5148 KKASSERT(device->refcount == 1); 5149 kfree(device, M_CAMXPT); 5150 } else { 5151 --device->refcount; 5152 } 5153 } 5154 5155 static u_int32_t 5156 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5157 { 5158 int diff; 5159 int result; 5160 struct cam_ed *dev; 5161 5162 dev = path->device; 5163 5164 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 5165 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5166 if (result == CAM_REQ_CMP && (diff < 0)) { 5167 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 5168 } 5169 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5170 || (dev->inq_flags & SID_CmdQue) != 0) 5171 dev->tag_saved_openings = newopenings; 5172 /* Adjust the global limit */ 5173 dev->sim->max_ccbs += diff; 5174 return (result); 5175 } 5176 5177 static struct cam_eb * 5178 xpt_find_bus(path_id_t path_id) 5179 { 5180 struct cam_eb *bus; 5181 5182 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5183 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 5184 if (bus->path_id == path_id) { 5185 bus->refcount++; 5186 break; 5187 } 5188 } 5189 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5190 return (bus); 5191 } 5192 5193 static struct cam_et * 5194 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5195 { 5196 struct cam_et *target; 5197 5198 TAILQ_FOREACH(target, &bus->et_entries, links) { 5199 if (target->target_id == target_id) { 5200 target->refcount++; 5201 break; 5202 } 5203 } 5204 return (target); 5205 } 5206 5207 static struct cam_ed * 5208 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5209 { 5210 struct cam_ed *device; 5211 5212 TAILQ_FOREACH(device, &target->ed_entries, links) { 5213 if (device->lun_id == lun_id) { 5214 device->refcount++; 5215 break; 5216 } 5217 } 5218 return (device); 5219 } 5220 5221 typedef struct { 5222 union ccb *request_ccb; 5223 struct ccb_pathinq *cpi; 5224 int counter; 5225 } xpt_scan_bus_info; 5226 5227 /* 5228 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5229 * As the scan progresses, xpt_scan_bus is used as the 5230 * callback on completion function. 5231 */ 5232 static void 5233 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5234 { 5235 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5236 ("xpt_scan_bus\n")); 5237 switch (request_ccb->ccb_h.func_code) { 5238 case XPT_SCAN_BUS: 5239 { 5240 xpt_scan_bus_info *scan_info; 5241 union ccb *work_ccb; 5242 struct cam_path *path; 5243 u_int i; 5244 u_int max_target; 5245 u_int initiator_id; 5246 5247 /* Find out the characteristics of the bus */ 5248 work_ccb = xpt_alloc_ccb(); 5249 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5250 request_ccb->ccb_h.pinfo.priority); 5251 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5252 xpt_action(work_ccb); 5253 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5254 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5255 xpt_free_ccb(work_ccb); 5256 xpt_done(request_ccb); 5257 return; 5258 } 5259 5260 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5261 /* 5262 * Can't scan the bus on an adapter that 5263 * cannot perform the initiator role. 5264 */ 5265 request_ccb->ccb_h.status = CAM_REQ_CMP; 5266 xpt_free_ccb(work_ccb); 5267 xpt_done(request_ccb); 5268 return; 5269 } 5270 5271 /* Save some state for use while we probe for devices */ 5272 scan_info = (xpt_scan_bus_info *) 5273 kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); 5274 scan_info->request_ccb = request_ccb; 5275 scan_info->cpi = &work_ccb->cpi; 5276 5277 /* Cache on our stack so we can work asynchronously */ 5278 max_target = scan_info->cpi->max_target; 5279 initiator_id = scan_info->cpi->initiator_id; 5280 5281 5282 /* 5283 * We can scan all targets in parallel, or do it sequentially. 5284 */ 5285 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5286 max_target = 0; 5287 scan_info->counter = 0; 5288 } else { 5289 scan_info->counter = scan_info->cpi->max_target + 1; 5290 if (scan_info->cpi->initiator_id < scan_info->counter) { 5291 scan_info->counter--; 5292 } 5293 } 5294 5295 for (i = 0; i <= max_target; i++) { 5296 cam_status status; 5297 if (i == initiator_id) 5298 continue; 5299 5300 status = xpt_create_path(&path, xpt_periph, 5301 request_ccb->ccb_h.path_id, 5302 i, 0); 5303 if (status != CAM_REQ_CMP) { 5304 kprintf("xpt_scan_bus: xpt_create_path failed" 5305 " with status %#x, bus scan halted\n", 5306 status); 5307 kfree(scan_info, M_CAMXPT); 5308 request_ccb->ccb_h.status = status; 5309 xpt_free_ccb(work_ccb); 5310 xpt_done(request_ccb); 5311 break; 5312 } 5313 work_ccb = xpt_alloc_ccb(); 5314 xpt_setup_ccb(&work_ccb->ccb_h, path, 5315 request_ccb->ccb_h.pinfo.priority); 5316 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5317 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5318 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5319 work_ccb->crcn.flags = request_ccb->crcn.flags; 5320 xpt_action(work_ccb); 5321 } 5322 break; 5323 } 5324 case XPT_SCAN_LUN: 5325 { 5326 cam_status status; 5327 struct cam_path *path; 5328 xpt_scan_bus_info *scan_info; 5329 path_id_t path_id; 5330 target_id_t target_id; 5331 lun_id_t lun_id; 5332 5333 /* Reuse the same CCB to query if a device was really found */ 5334 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5335 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5336 request_ccb->ccb_h.pinfo.priority); 5337 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5338 5339 path_id = request_ccb->ccb_h.path_id; 5340 target_id = request_ccb->ccb_h.target_id; 5341 lun_id = request_ccb->ccb_h.target_lun; 5342 xpt_action(request_ccb); 5343 5344 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5345 struct cam_ed *device; 5346 struct cam_et *target; 5347 int phl; 5348 5349 /* 5350 * If we already probed lun 0 successfully, or 5351 * we have additional configured luns on this 5352 * target that might have "gone away", go onto 5353 * the next lun. 5354 */ 5355 target = request_ccb->ccb_h.path->target; 5356 /* 5357 * We may touch devices that we don't 5358 * hold references too, so ensure they 5359 * don't disappear out from under us. 5360 * The target above is referenced by the 5361 * path in the request ccb. 5362 */ 5363 phl = 0; 5364 device = TAILQ_FIRST(&target->ed_entries); 5365 if (device != NULL) { 5366 phl = CAN_SRCH_HI_SPARSE(device); 5367 if (device->lun_id == 0) 5368 device = TAILQ_NEXT(device, links); 5369 } 5370 if ((lun_id != 0) || (device != NULL)) { 5371 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5372 lun_id++; 5373 } 5374 } else { 5375 struct cam_ed *device; 5376 5377 device = request_ccb->ccb_h.path->device; 5378 5379 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5380 /* Try the next lun */ 5381 if (lun_id < (CAM_SCSI2_MAXLUN-1) 5382 || CAN_SRCH_HI_DENSE(device)) 5383 lun_id++; 5384 } 5385 } 5386 5387 /* 5388 * Free the current request path- we're done with it. 5389 */ 5390 xpt_free_path(request_ccb->ccb_h.path); 5391 5392 /* 5393 * Check to see if we scan any further luns. 5394 */ 5395 if (lun_id == request_ccb->ccb_h.target_lun 5396 || lun_id > scan_info->cpi->max_lun) { 5397 int done; 5398 5399 hop_again: 5400 done = 0; 5401 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5402 scan_info->counter++; 5403 if (scan_info->counter == 5404 scan_info->cpi->initiator_id) { 5405 scan_info->counter++; 5406 } 5407 if (scan_info->counter >= 5408 scan_info->cpi->max_target+1) { 5409 done = 1; 5410 } 5411 } else { 5412 scan_info->counter--; 5413 if (scan_info->counter == 0) { 5414 done = 1; 5415 } 5416 } 5417 if (done) { 5418 xpt_free_ccb(request_ccb); 5419 xpt_free_ccb((union ccb *)scan_info->cpi); 5420 request_ccb = scan_info->request_ccb; 5421 kfree(scan_info, M_CAMXPT); 5422 request_ccb->ccb_h.status = CAM_REQ_CMP; 5423 xpt_done(request_ccb); 5424 break; 5425 } 5426 5427 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { 5428 break; 5429 } 5430 status = xpt_create_path(&path, xpt_periph, 5431 scan_info->request_ccb->ccb_h.path_id, 5432 scan_info->counter, 0); 5433 if (status != CAM_REQ_CMP) { 5434 kprintf("xpt_scan_bus: xpt_create_path failed" 5435 " with status %#x, bus scan halted\n", 5436 status); 5437 xpt_free_ccb(request_ccb); 5438 xpt_free_ccb((union ccb *)scan_info->cpi); 5439 request_ccb = scan_info->request_ccb; 5440 kfree(scan_info, M_CAMXPT); 5441 request_ccb->ccb_h.status = status; 5442 xpt_done(request_ccb); 5443 break; 5444 } 5445 xpt_setup_ccb(&request_ccb->ccb_h, path, 5446 request_ccb->ccb_h.pinfo.priority); 5447 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5448 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5449 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5450 request_ccb->crcn.flags = 5451 scan_info->request_ccb->crcn.flags; 5452 } else { 5453 status = xpt_create_path(&path, xpt_periph, 5454 path_id, target_id, lun_id); 5455 if (status != CAM_REQ_CMP) { 5456 kprintf("xpt_scan_bus: xpt_create_path failed " 5457 "with status %#x, halting LUN scan\n", 5458 status); 5459 goto hop_again; 5460 } 5461 xpt_setup_ccb(&request_ccb->ccb_h, path, 5462 request_ccb->ccb_h.pinfo.priority); 5463 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5464 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5465 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5466 request_ccb->crcn.flags = 5467 scan_info->request_ccb->crcn.flags; 5468 } 5469 xpt_action(request_ccb); 5470 break; 5471 } 5472 default: 5473 break; 5474 } 5475 } 5476 5477 typedef enum { 5478 PROBE_TUR, 5479 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ 5480 PROBE_FULL_INQUIRY, 5481 PROBE_MODE_SENSE, 5482 PROBE_SERIAL_NUM_0, 5483 PROBE_SERIAL_NUM_1, 5484 PROBE_TUR_FOR_NEGOTIATION, 5485 PROBE_INQUIRY_BASIC_DV1, 5486 PROBE_INQUIRY_BASIC_DV2, 5487 PROBE_DV_EXIT 5488 } probe_action; 5489 5490 typedef enum { 5491 PROBE_INQUIRY_CKSUM = 0x01, 5492 PROBE_SERIAL_CKSUM = 0x02, 5493 PROBE_NO_ANNOUNCE = 0x04 5494 } probe_flags; 5495 5496 typedef struct { 5497 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5498 probe_action action; 5499 union ccb saved_ccb; 5500 probe_flags flags; 5501 MD5_CTX context; 5502 u_int8_t digest[16]; 5503 } probe_softc; 5504 5505 static void 5506 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5507 cam_flags flags, union ccb *request_ccb) 5508 { 5509 struct ccb_pathinq cpi; 5510 cam_status status; 5511 struct cam_path *new_path; 5512 struct cam_periph *old_periph; 5513 5514 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5515 ("xpt_scan_lun\n")); 5516 5517 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5518 cpi.ccb_h.func_code = XPT_PATH_INQ; 5519 xpt_action((union ccb *)&cpi); 5520 5521 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5522 if (request_ccb != NULL) { 5523 request_ccb->ccb_h.status = cpi.ccb_h.status; 5524 xpt_done(request_ccb); 5525 } 5526 return; 5527 } 5528 5529 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5530 /* 5531 * Can't scan the bus on an adapter that 5532 * cannot perform the initiator role. 5533 */ 5534 if (request_ccb != NULL) { 5535 request_ccb->ccb_h.status = CAM_REQ_CMP; 5536 xpt_done(request_ccb); 5537 } 5538 return; 5539 } 5540 5541 if (request_ccb == NULL) { 5542 request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); 5543 new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); 5544 status = xpt_compile_path(new_path, xpt_periph, 5545 path->bus->path_id, 5546 path->target->target_id, 5547 path->device->lun_id); 5548 5549 if (status != CAM_REQ_CMP) { 5550 xpt_print(path, "xpt_scan_lun: can't compile path, " 5551 "can't continue\n"); 5552 kfree(request_ccb, M_CAMXPT); 5553 kfree(new_path, M_CAMXPT); 5554 return; 5555 } 5556 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5557 request_ccb->ccb_h.cbfcnp = xptscandone; 5558 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5559 request_ccb->crcn.flags = flags; 5560 } 5561 5562 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5563 probe_softc *softc; 5564 5565 softc = (probe_softc *)old_periph->softc; 5566 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5567 periph_links.tqe); 5568 } else { 5569 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5570 probestart, "probe", 5571 CAM_PERIPH_BIO, 5572 request_ccb->ccb_h.path, NULL, 0, 5573 request_ccb); 5574 5575 if (status != CAM_REQ_CMP) { 5576 xpt_print(path, "xpt_scan_lun: cam_alloc_periph " 5577 "returned an error, can't continue probe\n"); 5578 request_ccb->ccb_h.status = status; 5579 xpt_done(request_ccb); 5580 } 5581 } 5582 } 5583 5584 static void 5585 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5586 { 5587 xpt_release_path(done_ccb->ccb_h.path); 5588 kfree(done_ccb->ccb_h.path, M_CAMXPT); 5589 kfree(done_ccb, M_CAMXPT); 5590 } 5591 5592 static cam_status 5593 proberegister(struct cam_periph *periph, void *arg) 5594 { 5595 union ccb *request_ccb; /* CCB representing the probe request */ 5596 cam_status status; 5597 probe_softc *softc; 5598 5599 request_ccb = (union ccb *)arg; 5600 if (periph == NULL) { 5601 kprintf("proberegister: periph was NULL!!\n"); 5602 return(CAM_REQ_CMP_ERR); 5603 } 5604 5605 if (request_ccb == NULL) { 5606 kprintf("proberegister: no probe CCB, " 5607 "can't register device\n"); 5608 return(CAM_REQ_CMP_ERR); 5609 } 5610 5611 softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); 5612 TAILQ_INIT(&softc->request_ccbs); 5613 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5614 periph_links.tqe); 5615 softc->flags = 0; 5616 periph->softc = softc; 5617 status = cam_periph_acquire(periph); 5618 if (status != CAM_REQ_CMP) { 5619 return (status); 5620 } 5621 5622 5623 /* 5624 * Ensure we've waited at least a bus settle 5625 * delay before attempting to probe the device. 5626 * For HBAs that don't do bus resets, this won't make a difference. 5627 */ 5628 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5629 scsi_delay); 5630 probeschedule(periph); 5631 return(CAM_REQ_CMP); 5632 } 5633 5634 static void 5635 probeschedule(struct cam_periph *periph) 5636 { 5637 struct ccb_pathinq cpi; 5638 union ccb *ccb; 5639 probe_softc *softc; 5640 5641 softc = (probe_softc *)periph->softc; 5642 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5643 5644 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5645 cpi.ccb_h.func_code = XPT_PATH_INQ; 5646 xpt_action((union ccb *)&cpi); 5647 5648 /* 5649 * If a device has gone away and another device, or the same one, 5650 * is back in the same place, it should have a unit attention 5651 * condition pending. It will not report the unit attention in 5652 * response to an inquiry, which may leave invalid transfer 5653 * negotiations in effect. The TUR will reveal the unit attention 5654 * condition. Only send the TUR for lun 0, since some devices 5655 * will get confused by commands other than inquiry to non-existent 5656 * luns. If you think a device has gone away start your scan from 5657 * lun 0. This will insure that any bogus transfer settings are 5658 * invalidated. 5659 * 5660 * If we haven't seen the device before and the controller supports 5661 * some kind of transfer negotiation, negotiate with the first 5662 * sent command if no bus reset was performed at startup. This 5663 * ensures that the device is not confused by transfer negotiation 5664 * settings left over by loader or BIOS action. 5665 */ 5666 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5667 && (ccb->ccb_h.target_lun == 0)) { 5668 softc->action = PROBE_TUR; 5669 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5670 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5671 proberequestdefaultnegotiation(periph); 5672 softc->action = PROBE_INQUIRY; 5673 } else { 5674 softc->action = PROBE_INQUIRY; 5675 } 5676 5677 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5678 softc->flags |= PROBE_NO_ANNOUNCE; 5679 else 5680 softc->flags &= ~PROBE_NO_ANNOUNCE; 5681 5682 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5683 } 5684 5685 static void 5686 probestart(struct cam_periph *periph, union ccb *start_ccb) 5687 { 5688 /* Probe the device that our peripheral driver points to */ 5689 struct ccb_scsiio *csio; 5690 probe_softc *softc; 5691 5692 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5693 5694 softc = (probe_softc *)periph->softc; 5695 csio = &start_ccb->csio; 5696 5697 switch (softc->action) { 5698 case PROBE_TUR: 5699 case PROBE_TUR_FOR_NEGOTIATION: 5700 case PROBE_DV_EXIT: 5701 { 5702 scsi_test_unit_ready(csio, 5703 /*retries*/4, 5704 probedone, 5705 MSG_SIMPLE_Q_TAG, 5706 SSD_FULL_SIZE, 5707 /*timeout*/60000); 5708 break; 5709 } 5710 case PROBE_INQUIRY: 5711 case PROBE_FULL_INQUIRY: 5712 case PROBE_INQUIRY_BASIC_DV1: 5713 case PROBE_INQUIRY_BASIC_DV2: 5714 { 5715 u_int inquiry_len; 5716 struct scsi_inquiry_data *inq_buf; 5717 5718 inq_buf = &periph->path->device->inq_data; 5719 5720 /* 5721 * If the device is currently configured, we calculate an 5722 * MD5 checksum of the inquiry data, and if the serial number 5723 * length is greater than 0, add the serial number data 5724 * into the checksum as well. Once the inquiry and the 5725 * serial number check finish, we attempt to figure out 5726 * whether we still have the same device. 5727 */ 5728 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5729 5730 MD5Init(&softc->context); 5731 MD5Update(&softc->context, (unsigned char *)inq_buf, 5732 sizeof(struct scsi_inquiry_data)); 5733 softc->flags |= PROBE_INQUIRY_CKSUM; 5734 if (periph->path->device->serial_num_len > 0) { 5735 MD5Update(&softc->context, 5736 periph->path->device->serial_num, 5737 periph->path->device->serial_num_len); 5738 softc->flags |= PROBE_SERIAL_CKSUM; 5739 } 5740 MD5Final(softc->digest, &softc->context); 5741 } 5742 5743 if (softc->action == PROBE_INQUIRY) 5744 inquiry_len = SHORT_INQUIRY_LENGTH; 5745 else 5746 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); 5747 5748 /* 5749 * Some parallel SCSI devices fail to send an 5750 * ignore wide residue message when dealing with 5751 * odd length inquiry requests. Round up to be 5752 * safe. 5753 */ 5754 inquiry_len = roundup2(inquiry_len, 2); 5755 5756 if (softc->action == PROBE_INQUIRY_BASIC_DV1 5757 || softc->action == PROBE_INQUIRY_BASIC_DV2) { 5758 inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); 5759 } 5760 scsi_inquiry(csio, 5761 /*retries*/4, 5762 probedone, 5763 MSG_SIMPLE_Q_TAG, 5764 (u_int8_t *)inq_buf, 5765 inquiry_len, 5766 /*evpd*/FALSE, 5767 /*page_code*/0, 5768 SSD_MIN_SIZE, 5769 /*timeout*/60 * 1000); 5770 break; 5771 } 5772 case PROBE_MODE_SENSE: 5773 { 5774 void *mode_buf; 5775 int mode_buf_len; 5776 5777 mode_buf_len = sizeof(struct scsi_mode_header_6) 5778 + sizeof(struct scsi_mode_blk_desc) 5779 + sizeof(struct scsi_control_page); 5780 mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); 5781 scsi_mode_sense(csio, 5782 /*retries*/4, 5783 probedone, 5784 MSG_SIMPLE_Q_TAG, 5785 /*dbd*/FALSE, 5786 SMS_PAGE_CTRL_CURRENT, 5787 SMS_CONTROL_MODE_PAGE, 5788 mode_buf, 5789 mode_buf_len, 5790 SSD_FULL_SIZE, 5791 /*timeout*/60000); 5792 break; 5793 } 5794 case PROBE_SERIAL_NUM_0: 5795 { 5796 struct scsi_vpd_supported_page_list *vpd_list = NULL; 5797 struct cam_ed *device; 5798 5799 device = periph->path->device; 5800 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5801 vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, 5802 M_INTWAIT | M_ZERO); 5803 } 5804 5805 if (vpd_list != NULL) { 5806 scsi_inquiry(csio, 5807 /*retries*/4, 5808 probedone, 5809 MSG_SIMPLE_Q_TAG, 5810 (u_int8_t *)vpd_list, 5811 sizeof(*vpd_list), 5812 /*evpd*/TRUE, 5813 SVPD_SUPPORTED_PAGE_LIST, 5814 SSD_MIN_SIZE, 5815 /*timeout*/60 * 1000); 5816 break; 5817 } 5818 /* 5819 * We'll have to do without, let our probedone 5820 * routine finish up for us. 5821 */ 5822 start_ccb->csio.data_ptr = NULL; 5823 probedone(periph, start_ccb); 5824 return; 5825 } 5826 case PROBE_SERIAL_NUM_1: 5827 { 5828 struct scsi_vpd_unit_serial_number *serial_buf; 5829 struct cam_ed* device; 5830 5831 serial_buf = NULL; 5832 device = periph->path->device; 5833 device->serial_num = NULL; 5834 device->serial_num_len = 0; 5835 5836 serial_buf = (struct scsi_vpd_unit_serial_number *) 5837 kmalloc(sizeof(*serial_buf), M_CAMXPT, 5838 M_INTWAIT | M_ZERO); 5839 scsi_inquiry(csio, 5840 /*retries*/4, 5841 probedone, 5842 MSG_SIMPLE_Q_TAG, 5843 (u_int8_t *)serial_buf, 5844 sizeof(*serial_buf), 5845 /*evpd*/TRUE, 5846 SVPD_UNIT_SERIAL_NUMBER, 5847 SSD_MIN_SIZE, 5848 /*timeout*/60 * 1000); 5849 break; 5850 } 5851 } 5852 xpt_action(start_ccb); 5853 } 5854 5855 static void 5856 proberequestdefaultnegotiation(struct cam_periph *periph) 5857 { 5858 struct ccb_trans_settings cts; 5859 5860 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5861 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5862 cts.type = CTS_TYPE_USER_SETTINGS; 5863 xpt_action((union ccb *)&cts); 5864 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5865 return; 5866 } 5867 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5868 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5869 xpt_action((union ccb *)&cts); 5870 } 5871 5872 /* 5873 * Backoff Negotiation Code- only pertinent for SPI devices. 5874 */ 5875 static int 5876 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) 5877 { 5878 struct ccb_trans_settings cts; 5879 struct ccb_trans_settings_spi *spi; 5880 5881 memset(&cts, 0, sizeof (cts)); 5882 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5883 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5884 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5885 xpt_action((union ccb *)&cts); 5886 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5887 if (bootverbose) { 5888 xpt_print(periph->path, 5889 "failed to get current device settings\n"); 5890 } 5891 return (0); 5892 } 5893 if (cts.transport != XPORT_SPI) { 5894 if (bootverbose) { 5895 xpt_print(periph->path, "not SPI transport\n"); 5896 } 5897 return (0); 5898 } 5899 spi = &cts.xport_specific.spi; 5900 5901 /* 5902 * We cannot renegotiate sync rate if we don't have one. 5903 */ 5904 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { 5905 if (bootverbose) { 5906 xpt_print(periph->path, "no sync rate known\n"); 5907 } 5908 return (0); 5909 } 5910 5911 /* 5912 * We'll assert that we don't have to touch PPR options- the 5913 * SIM will see what we do with period and offset and adjust 5914 * the PPR options as appropriate. 5915 */ 5916 5917 /* 5918 * A sync rate with unknown or zero offset is nonsensical. 5919 * A sync period of zero means Async. 5920 */ 5921 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 5922 || spi->sync_offset == 0 || spi->sync_period == 0) { 5923 if (bootverbose) { 5924 xpt_print(periph->path, "no sync rate available\n"); 5925 } 5926 return (0); 5927 } 5928 5929 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { 5930 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5931 ("hit async: giving up on DV\n")); 5932 return (0); 5933 } 5934 5935 5936 /* 5937 * Jump sync_period up by one, but stop at 5MHz and fall back to Async. 5938 * We don't try to remember 'last' settings to see if the SIM actually 5939 * gets into the speed we want to set. We check on the SIM telling 5940 * us that a requested speed is bad, but otherwise don't try and 5941 * check the speed due to the asynchronous and handshake nature 5942 * of speed setting. 5943 */ 5944 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; 5945 for (;;) { 5946 spi->sync_period++; 5947 if (spi->sync_period >= 0xf) { 5948 spi->sync_period = 0; 5949 spi->sync_offset = 0; 5950 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5951 ("setting to async for DV\n")); 5952 /* 5953 * Once we hit async, we don't want to try 5954 * any more settings. 5955 */ 5956 device->flags |= CAM_DEV_DV_HIT_BOTTOM; 5957 } else if (bootverbose) { 5958 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5959 ("DV: period 0x%x\n", spi->sync_period)); 5960 kprintf("setting period to 0x%x\n", spi->sync_period); 5961 } 5962 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5963 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5964 xpt_action((union ccb *)&cts); 5965 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5966 break; 5967 } 5968 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5969 ("DV: failed to set period 0x%x\n", spi->sync_period)); 5970 if (spi->sync_period == 0) { 5971 return (0); 5972 } 5973 } 5974 return (1); 5975 } 5976 5977 static void 5978 probedone(struct cam_periph *periph, union ccb *done_ccb) 5979 { 5980 probe_softc *softc; 5981 struct cam_path *path; 5982 u_int32_t priority; 5983 5984 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5985 5986 softc = (probe_softc *)periph->softc; 5987 path = done_ccb->ccb_h.path; 5988 priority = done_ccb->ccb_h.pinfo.priority; 5989 5990 switch (softc->action) { 5991 case PROBE_TUR: 5992 { 5993 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5994 5995 if (cam_periph_error(done_ccb, 0, 5996 SF_NO_PRINT, NULL) == ERESTART) 5997 return; 5998 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5999 /* Don't wedge the queue */ 6000 xpt_release_devq(done_ccb->ccb_h.path, 6001 /*count*/1, 6002 /*run_queue*/TRUE); 6003 } 6004 softc->action = PROBE_INQUIRY; 6005 xpt_release_ccb(done_ccb); 6006 xpt_schedule(periph, priority); 6007 return; 6008 } 6009 case PROBE_INQUIRY: 6010 case PROBE_FULL_INQUIRY: 6011 { 6012 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6013 struct scsi_inquiry_data *inq_buf; 6014 u_int8_t periph_qual; 6015 6016 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 6017 inq_buf = &path->device->inq_data; 6018 6019 periph_qual = SID_QUAL(inq_buf); 6020 6021 switch(periph_qual) { 6022 case SID_QUAL_LU_CONNECTED: 6023 { 6024 u_int8_t len; 6025 6026 /* 6027 * We conservatively request only 6028 * SHORT_INQUIRY_LEN bytes of inquiry 6029 * information during our first try 6030 * at sending an INQUIRY. If the device 6031 * has more information to give, 6032 * perform a second request specifying 6033 * the amount of information the device 6034 * is willing to give. 6035 */ 6036 len = inq_buf->additional_length 6037 + offsetof(struct scsi_inquiry_data, 6038 additional_length) + 1; 6039 if (softc->action == PROBE_INQUIRY 6040 && len > SHORT_INQUIRY_LENGTH) { 6041 softc->action = PROBE_FULL_INQUIRY; 6042 xpt_release_ccb(done_ccb); 6043 xpt_schedule(periph, priority); 6044 return; 6045 } 6046 6047 xpt_find_quirk(path->device); 6048 6049 xpt_devise_transport(path); 6050 if (INQ_DATA_TQ_ENABLED(inq_buf)) 6051 softc->action = PROBE_MODE_SENSE; 6052 else 6053 softc->action = PROBE_SERIAL_NUM_0; 6054 6055 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 6056 xpt_reference_device(path->device); 6057 6058 xpt_release_ccb(done_ccb); 6059 xpt_schedule(periph, priority); 6060 return; 6061 } 6062 default: 6063 break; 6064 } 6065 } else if (cam_periph_error(done_ccb, 0, 6066 done_ccb->ccb_h.target_lun > 0 6067 ? SF_RETRY_UA|SF_QUIET_IR 6068 : SF_RETRY_UA, 6069 &softc->saved_ccb) == ERESTART) { 6070 return; 6071 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6072 /* Don't wedge the queue */ 6073 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6074 /*run_queue*/TRUE); 6075 } 6076 /* 6077 * If we get to this point, we got an error status back 6078 * from the inquiry and the error status doesn't require 6079 * automatically retrying the command. Therefore, the 6080 * inquiry failed. If we had inquiry information before 6081 * for this device, but this latest inquiry command failed, 6082 * the device has probably gone away. If this device isn't 6083 * already marked unconfigured, notify the peripheral 6084 * drivers that this device is no more. 6085 */ 6086 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 6087 /* Send the async notification. */ 6088 xpt_async(AC_LOST_DEVICE, path, NULL); 6089 } 6090 6091 xpt_release_ccb(done_ccb); 6092 break; 6093 } 6094 case PROBE_MODE_SENSE: 6095 { 6096 struct ccb_scsiio *csio; 6097 struct scsi_mode_header_6 *mode_hdr; 6098 6099 csio = &done_ccb->csio; 6100 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 6101 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6102 struct scsi_control_page *page; 6103 u_int8_t *offset; 6104 6105 offset = ((u_int8_t *)&mode_hdr[1]) 6106 + mode_hdr->blk_desc_len; 6107 page = (struct scsi_control_page *)offset; 6108 path->device->queue_flags = page->queue_flags; 6109 } else if (cam_periph_error(done_ccb, 0, 6110 SF_RETRY_UA|SF_NO_PRINT, 6111 &softc->saved_ccb) == ERESTART) { 6112 return; 6113 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6114 /* Don't wedge the queue */ 6115 xpt_release_devq(done_ccb->ccb_h.path, 6116 /*count*/1, /*run_queue*/TRUE); 6117 } 6118 xpt_release_ccb(done_ccb); 6119 kfree(mode_hdr, M_CAMXPT); 6120 softc->action = PROBE_SERIAL_NUM_0; 6121 xpt_schedule(periph, priority); 6122 return; 6123 } 6124 case PROBE_SERIAL_NUM_0: 6125 { 6126 struct ccb_scsiio *csio; 6127 struct scsi_vpd_supported_page_list *page_list; 6128 int length, serialnum_supported, i; 6129 6130 serialnum_supported = 0; 6131 csio = &done_ccb->csio; 6132 page_list = 6133 (struct scsi_vpd_supported_page_list *)csio->data_ptr; 6134 6135 if (page_list == NULL) { 6136 /* 6137 * Don't process the command as it was never sent 6138 */ 6139 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6140 && (page_list->length > 0)) { 6141 length = min(page_list->length, 6142 SVPD_SUPPORTED_PAGES_SIZE); 6143 for (i = 0; i < length; i++) { 6144 if (page_list->list[i] == 6145 SVPD_UNIT_SERIAL_NUMBER) { 6146 serialnum_supported = 1; 6147 break; 6148 } 6149 } 6150 } else if (cam_periph_error(done_ccb, 0, 6151 SF_RETRY_UA|SF_NO_PRINT, 6152 &softc->saved_ccb) == ERESTART) { 6153 return; 6154 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6155 /* Don't wedge the queue */ 6156 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6157 /*run_queue*/TRUE); 6158 } 6159 6160 if (page_list != NULL) 6161 kfree(page_list, M_DEVBUF); 6162 6163 if (serialnum_supported) { 6164 xpt_release_ccb(done_ccb); 6165 softc->action = PROBE_SERIAL_NUM_1; 6166 xpt_schedule(periph, priority); 6167 return; 6168 } 6169 xpt_release_ccb(done_ccb); 6170 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6171 xpt_schedule(periph, done_ccb->ccb_h.pinfo.priority); 6172 return; 6173 } 6174 6175 case PROBE_SERIAL_NUM_1: 6176 { 6177 struct ccb_scsiio *csio; 6178 struct scsi_vpd_unit_serial_number *serial_buf; 6179 u_int32_t priority; 6180 int changed; 6181 int have_serialnum; 6182 6183 changed = 1; 6184 have_serialnum = 0; 6185 csio = &done_ccb->csio; 6186 priority = done_ccb->ccb_h.pinfo.priority; 6187 serial_buf = 6188 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 6189 6190 /* Clean up from previous instance of this device */ 6191 if (path->device->serial_num != NULL) { 6192 kfree(path->device->serial_num, M_CAMXPT); 6193 path->device->serial_num = NULL; 6194 path->device->serial_num_len = 0; 6195 } 6196 6197 if (serial_buf == NULL) { 6198 /* 6199 * Don't process the command as it was never sent 6200 */ 6201 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6202 && (serial_buf->length > 0)) { 6203 6204 have_serialnum = 1; 6205 path->device->serial_num = 6206 kmalloc((serial_buf->length + 1), 6207 M_CAMXPT, M_INTWAIT); 6208 bcopy(serial_buf->serial_num, 6209 path->device->serial_num, 6210 serial_buf->length); 6211 path->device->serial_num_len = serial_buf->length; 6212 path->device->serial_num[serial_buf->length] = '\0'; 6213 } else if (cam_periph_error(done_ccb, 0, 6214 SF_RETRY_UA|SF_NO_PRINT, 6215 &softc->saved_ccb) == ERESTART) { 6216 return; 6217 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6218 /* Don't wedge the queue */ 6219 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6220 /*run_queue*/TRUE); 6221 } 6222 6223 /* 6224 * Let's see if we have seen this device before. 6225 */ 6226 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 6227 MD5_CTX context; 6228 u_int8_t digest[16]; 6229 6230 MD5Init(&context); 6231 6232 MD5Update(&context, 6233 (unsigned char *)&path->device->inq_data, 6234 sizeof(struct scsi_inquiry_data)); 6235 6236 if (have_serialnum) 6237 MD5Update(&context, serial_buf->serial_num, 6238 serial_buf->length); 6239 6240 MD5Final(digest, &context); 6241 if (bcmp(softc->digest, digest, 16) == 0) 6242 changed = 0; 6243 6244 /* 6245 * XXX Do we need to do a TUR in order to ensure 6246 * that the device really hasn't changed??? 6247 */ 6248 if ((changed != 0) 6249 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 6250 xpt_async(AC_LOST_DEVICE, path, NULL); 6251 } 6252 if (serial_buf != NULL) 6253 kfree(serial_buf, M_CAMXPT); 6254 6255 if (changed != 0) { 6256 /* 6257 * Now that we have all the necessary 6258 * information to safely perform transfer 6259 * negotiations... Controllers don't perform 6260 * any negotiation or tagged queuing until 6261 * after the first XPT_SET_TRAN_SETTINGS ccb is 6262 * received. So, on a new device, just retrieve 6263 * the user settings, and set them as the current 6264 * settings to set the device up. 6265 */ 6266 proberequestdefaultnegotiation(periph); 6267 xpt_release_ccb(done_ccb); 6268 6269 /* 6270 * Perform a TUR to allow the controller to 6271 * perform any necessary transfer negotiation. 6272 */ 6273 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6274 xpt_schedule(periph, priority); 6275 return; 6276 } 6277 xpt_release_ccb(done_ccb); 6278 break; 6279 } 6280 case PROBE_TUR_FOR_NEGOTIATION: 6281 case PROBE_DV_EXIT: 6282 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6283 /* Don't wedge the queue */ 6284 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6285 /*run_queue*/TRUE); 6286 } 6287 6288 xpt_reference_device(path->device); 6289 /* 6290 * Do Domain Validation for lun 0 on devices that claim 6291 * to support Synchronous Transfer modes. 6292 */ 6293 if (softc->action == PROBE_TUR_FOR_NEGOTIATION 6294 && done_ccb->ccb_h.target_lun == 0 6295 && (path->device->inq_data.flags & SID_Sync) != 0 6296 && (path->device->flags & CAM_DEV_IN_DV) == 0) { 6297 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6298 ("Begin Domain Validation\n")); 6299 path->device->flags |= CAM_DEV_IN_DV; 6300 xpt_release_ccb(done_ccb); 6301 softc->action = PROBE_INQUIRY_BASIC_DV1; 6302 xpt_schedule(periph, priority); 6303 return; 6304 } 6305 if (softc->action == PROBE_DV_EXIT) { 6306 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6307 ("Leave Domain Validation\n")); 6308 } 6309 path->device->flags &= 6310 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6311 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6312 /* Inform the XPT that a new device has been found */ 6313 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6314 xpt_action(done_ccb); 6315 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6316 done_ccb); 6317 } 6318 xpt_release_ccb(done_ccb); 6319 break; 6320 case PROBE_INQUIRY_BASIC_DV1: 6321 case PROBE_INQUIRY_BASIC_DV2: 6322 { 6323 struct scsi_inquiry_data *nbuf; 6324 struct ccb_scsiio *csio; 6325 6326 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6327 /* Don't wedge the queue */ 6328 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6329 /*run_queue*/TRUE); 6330 } 6331 csio = &done_ccb->csio; 6332 nbuf = (struct scsi_inquiry_data *)csio->data_ptr; 6333 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { 6334 xpt_print(path, 6335 "inquiry data fails comparison at DV%d step\n", 6336 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); 6337 if (proberequestbackoff(periph, path->device)) { 6338 path->device->flags &= ~CAM_DEV_IN_DV; 6339 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6340 } else { 6341 /* give up */ 6342 softc->action = PROBE_DV_EXIT; 6343 } 6344 kfree(nbuf, M_CAMXPT); 6345 xpt_release_ccb(done_ccb); 6346 xpt_schedule(periph, priority); 6347 return; 6348 } 6349 kfree(nbuf, M_CAMXPT); 6350 if (softc->action == PROBE_INQUIRY_BASIC_DV1) { 6351 softc->action = PROBE_INQUIRY_BASIC_DV2; 6352 xpt_release_ccb(done_ccb); 6353 xpt_schedule(periph, priority); 6354 return; 6355 } 6356 if (softc->action == PROBE_DV_EXIT) { 6357 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6358 ("Leave Domain Validation Successfully\n")); 6359 } 6360 path->device->flags &= 6361 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6362 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6363 /* Inform the XPT that a new device has been found */ 6364 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6365 xpt_action(done_ccb); 6366 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6367 done_ccb); 6368 } 6369 xpt_release_ccb(done_ccb); 6370 break; 6371 } 6372 } 6373 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 6374 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 6375 done_ccb->ccb_h.status = CAM_REQ_CMP; 6376 xpt_done(done_ccb); 6377 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 6378 cam_periph_invalidate(periph); 6379 cam_periph_release(periph); 6380 } else { 6381 probeschedule(periph); 6382 } 6383 } 6384 6385 static void 6386 probecleanup(struct cam_periph *periph) 6387 { 6388 kfree(periph->softc, M_CAMXPT); 6389 } 6390 6391 static void 6392 xpt_find_quirk(struct cam_ed *device) 6393 { 6394 caddr_t match; 6395 6396 match = cam_quirkmatch((caddr_t)&device->inq_data, 6397 (caddr_t)xpt_quirk_table, 6398 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 6399 sizeof(*xpt_quirk_table), scsi_inquiry_match); 6400 6401 if (match == NULL) 6402 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 6403 6404 device->quirk = (struct xpt_quirk_entry *)match; 6405 } 6406 6407 static int 6408 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) 6409 { 6410 int error, bool; 6411 6412 bool = cam_srch_hi; 6413 error = sysctl_handle_int(oidp, &bool, 0, req); 6414 if (error != 0 || req->newptr == NULL) 6415 return (error); 6416 if (bool == 0 || bool == 1) { 6417 cam_srch_hi = bool; 6418 return (0); 6419 } else { 6420 return (EINVAL); 6421 } 6422 } 6423 6424 static void 6425 xpt_devise_transport(struct cam_path *path) 6426 { 6427 struct ccb_pathinq cpi; 6428 struct ccb_trans_settings cts; 6429 struct scsi_inquiry_data *inq_buf; 6430 6431 /* Get transport information from the SIM */ 6432 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 6433 cpi.ccb_h.func_code = XPT_PATH_INQ; 6434 xpt_action((union ccb *)&cpi); 6435 6436 inq_buf = NULL; 6437 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 6438 inq_buf = &path->device->inq_data; 6439 path->device->protocol = PROTO_SCSI; 6440 path->device->protocol_version = 6441 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 6442 path->device->transport = cpi.transport; 6443 path->device->transport_version = cpi.transport_version; 6444 6445 /* 6446 * Any device not using SPI3 features should 6447 * be considered SPI2 or lower. 6448 */ 6449 if (inq_buf != NULL) { 6450 if (path->device->transport == XPORT_SPI 6451 && (inq_buf->spi3data & SID_SPI_MASK) == 0 6452 && path->device->transport_version > 2) 6453 path->device->transport_version = 2; 6454 } else { 6455 struct cam_ed* otherdev; 6456 6457 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 6458 otherdev != NULL; 6459 otherdev = TAILQ_NEXT(otherdev, links)) { 6460 if (otherdev != path->device) 6461 break; 6462 } 6463 6464 if (otherdev != NULL) { 6465 /* 6466 * Initially assume the same versioning as 6467 * prior luns for this target. 6468 */ 6469 path->device->protocol_version = 6470 otherdev->protocol_version; 6471 path->device->transport_version = 6472 otherdev->transport_version; 6473 } else { 6474 /* Until we know better, opt for safty */ 6475 path->device->protocol_version = 2; 6476 if (path->device->transport == XPORT_SPI) 6477 path->device->transport_version = 2; 6478 else 6479 path->device->transport_version = 0; 6480 } 6481 } 6482 6483 /* 6484 * XXX 6485 * For a device compliant with SPC-2 we should be able 6486 * to determine the transport version supported by 6487 * scrutinizing the version descriptors in the 6488 * inquiry buffer. 6489 */ 6490 6491 /* Tell the controller what we think */ 6492 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 6493 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6494 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6495 cts.transport = path->device->transport; 6496 cts.transport_version = path->device->transport_version; 6497 cts.protocol = path->device->protocol; 6498 cts.protocol_version = path->device->protocol_version; 6499 cts.proto_specific.valid = 0; 6500 cts.xport_specific.valid = 0; 6501 xpt_action((union ccb *)&cts); 6502 } 6503 6504 static void 6505 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6506 int async_update) 6507 { 6508 struct ccb_pathinq cpi; 6509 struct ccb_trans_settings cur_cts; 6510 struct ccb_trans_settings_scsi *scsi; 6511 struct ccb_trans_settings_scsi *cur_scsi; 6512 struct cam_sim *sim; 6513 struct scsi_inquiry_data *inq_data; 6514 6515 if (device == NULL) { 6516 cts->ccb_h.status = CAM_PATH_INVALID; 6517 xpt_done((union ccb *)cts); 6518 return; 6519 } 6520 6521 if (cts->protocol == PROTO_UNKNOWN 6522 || cts->protocol == PROTO_UNSPECIFIED) { 6523 cts->protocol = device->protocol; 6524 cts->protocol_version = device->protocol_version; 6525 } 6526 6527 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 6528 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 6529 cts->protocol_version = device->protocol_version; 6530 6531 if (cts->protocol != device->protocol) { 6532 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", 6533 cts->protocol, device->protocol); 6534 cts->protocol = device->protocol; 6535 } 6536 6537 if (cts->protocol_version > device->protocol_version) { 6538 if (bootverbose) { 6539 xpt_print(cts->ccb_h.path, "Down reving Protocol " 6540 "Version from %d to %d?\n", cts->protocol_version, 6541 device->protocol_version); 6542 } 6543 cts->protocol_version = device->protocol_version; 6544 } 6545 6546 if (cts->transport == XPORT_UNKNOWN 6547 || cts->transport == XPORT_UNSPECIFIED) { 6548 cts->transport = device->transport; 6549 cts->transport_version = device->transport_version; 6550 } 6551 6552 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6553 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6554 cts->transport_version = device->transport_version; 6555 6556 if (cts->transport != device->transport) { 6557 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", 6558 cts->transport, device->transport); 6559 cts->transport = device->transport; 6560 } 6561 6562 if (cts->transport_version > device->transport_version) { 6563 if (bootverbose) { 6564 xpt_print(cts->ccb_h.path, "Down reving Transport " 6565 "Version from %d to %d?\n", cts->transport_version, 6566 device->transport_version); 6567 } 6568 cts->transport_version = device->transport_version; 6569 } 6570 6571 sim = cts->ccb_h.path->bus->sim; 6572 6573 /* 6574 * Nothing more of interest to do unless 6575 * this is a device connected via the 6576 * SCSI protocol. 6577 */ 6578 if (cts->protocol != PROTO_SCSI) { 6579 if (async_update == FALSE) 6580 (*(sim->sim_action))(sim, (union ccb *)cts); 6581 return; 6582 } 6583 6584 inq_data = &device->inq_data; 6585 scsi = &cts->proto_specific.scsi; 6586 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6587 cpi.ccb_h.func_code = XPT_PATH_INQ; 6588 xpt_action((union ccb *)&cpi); 6589 6590 /* SCSI specific sanity checking */ 6591 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6592 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 6593 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6594 || (device->quirk->mintags == 0)) { 6595 /* 6596 * Can't tag on hardware that doesn't support tags, 6597 * doesn't have it enabled, or has broken tag support. 6598 */ 6599 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6600 } 6601 6602 if (async_update == FALSE) { 6603 /* 6604 * Perform sanity checking against what the 6605 * controller and device can do. 6606 */ 6607 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6608 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6609 cur_cts.type = cts->type; 6610 xpt_action((union ccb *)&cur_cts); 6611 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6612 return; 6613 } 6614 cur_scsi = &cur_cts.proto_specific.scsi; 6615 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6616 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6617 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6618 } 6619 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6620 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6621 } 6622 6623 /* SPI specific sanity checking */ 6624 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6625 u_int spi3caps; 6626 struct ccb_trans_settings_spi *spi; 6627 struct ccb_trans_settings_spi *cur_spi; 6628 6629 spi = &cts->xport_specific.spi; 6630 6631 cur_spi = &cur_cts.xport_specific.spi; 6632 6633 /* Fill in any gaps in what the user gave us */ 6634 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6635 spi->sync_period = cur_spi->sync_period; 6636 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6637 spi->sync_period = 0; 6638 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6639 spi->sync_offset = cur_spi->sync_offset; 6640 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6641 spi->sync_offset = 0; 6642 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6643 spi->ppr_options = cur_spi->ppr_options; 6644 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6645 spi->ppr_options = 0; 6646 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6647 spi->bus_width = cur_spi->bus_width; 6648 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6649 spi->bus_width = 0; 6650 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6651 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6652 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6653 } 6654 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6655 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6656 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6657 && (inq_data->flags & SID_Sync) == 0 6658 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6659 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6660 || (spi->sync_offset == 0) 6661 || (spi->sync_period == 0)) { 6662 /* Force async */ 6663 spi->sync_period = 0; 6664 spi->sync_offset = 0; 6665 } 6666 6667 switch (spi->bus_width) { 6668 case MSG_EXT_WDTR_BUS_32_BIT: 6669 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6670 || (inq_data->flags & SID_WBus32) != 0 6671 || cts->type == CTS_TYPE_USER_SETTINGS) 6672 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6673 break; 6674 /* Fall Through to 16-bit */ 6675 case MSG_EXT_WDTR_BUS_16_BIT: 6676 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6677 || (inq_data->flags & SID_WBus16) != 0 6678 || cts->type == CTS_TYPE_USER_SETTINGS) 6679 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6680 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6681 break; 6682 } 6683 /* Fall Through to 8-bit */ 6684 default: /* New bus width?? */ 6685 case MSG_EXT_WDTR_BUS_8_BIT: 6686 /* All targets can do this */ 6687 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6688 break; 6689 } 6690 6691 spi3caps = cpi.xport_specific.spi.ppr_options; 6692 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6693 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6694 spi3caps &= inq_data->spi3data; 6695 6696 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6697 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6698 6699 if ((spi3caps & SID_SPI_IUS) == 0) 6700 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6701 6702 if ((spi3caps & SID_SPI_QAS) == 0) 6703 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6704 6705 /* No SPI Transfer settings are allowed unless we are wide */ 6706 if (spi->bus_width == 0) 6707 spi->ppr_options = 0; 6708 6709 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { 6710 /* 6711 * Can't tag queue without disconnection. 6712 */ 6713 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6714 scsi->valid |= CTS_SCSI_VALID_TQ; 6715 } 6716 6717 /* 6718 * If we are currently performing tagged transactions to 6719 * this device and want to change its negotiation parameters, 6720 * go non-tagged for a bit to give the controller a chance to 6721 * negotiate unhampered by tag messages. 6722 */ 6723 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6724 && (device->inq_flags & SID_CmdQue) != 0 6725 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6726 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6727 CTS_SPI_VALID_SYNC_OFFSET| 6728 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6729 xpt_toggle_tags(cts->ccb_h.path); 6730 } 6731 6732 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6733 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6734 int device_tagenb; 6735 6736 /* 6737 * If we are transitioning from tags to no-tags or 6738 * vice-versa, we need to carefully freeze and restart 6739 * the queue so that we don't overlap tagged and non-tagged 6740 * commands. We also temporarily stop tags if there is 6741 * a change in transfer negotiation settings to allow 6742 * "tag-less" negotiation. 6743 */ 6744 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6745 || (device->inq_flags & SID_CmdQue) != 0) 6746 device_tagenb = TRUE; 6747 else 6748 device_tagenb = FALSE; 6749 6750 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6751 && device_tagenb == FALSE) 6752 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6753 && device_tagenb == TRUE)) { 6754 6755 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6756 /* 6757 * Delay change to use tags until after a 6758 * few commands have gone to this device so 6759 * the controller has time to perform transfer 6760 * negotiations without tagged messages getting 6761 * in the way. 6762 */ 6763 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6764 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6765 } else { 6766 struct ccb_relsim crs; 6767 6768 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6769 device->inq_flags &= ~SID_CmdQue; 6770 xpt_dev_ccbq_resize(cts->ccb_h.path, 6771 sim->max_dev_openings); 6772 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6773 device->tag_delay_count = 0; 6774 6775 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6776 /*priority*/1); 6777 crs.ccb_h.func_code = XPT_REL_SIMQ; 6778 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6779 crs.openings 6780 = crs.release_timeout 6781 = crs.qfrozen_cnt 6782 = 0; 6783 xpt_action((union ccb *)&crs); 6784 } 6785 } 6786 } 6787 if (async_update == FALSE) 6788 (*(sim->sim_action))(sim, (union ccb *)cts); 6789 } 6790 6791 static void 6792 xpt_toggle_tags(struct cam_path *path) 6793 { 6794 struct cam_ed *dev; 6795 6796 /* 6797 * Give controllers a chance to renegotiate 6798 * before starting tag operations. We 6799 * "toggle" tagged queuing off then on 6800 * which causes the tag enable command delay 6801 * counter to come into effect. 6802 */ 6803 dev = path->device; 6804 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6805 || ((dev->inq_flags & SID_CmdQue) != 0 6806 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6807 struct ccb_trans_settings cts; 6808 6809 xpt_setup_ccb(&cts.ccb_h, path, 1); 6810 cts.protocol = PROTO_SCSI; 6811 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6812 cts.transport = XPORT_UNSPECIFIED; 6813 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6814 cts.proto_specific.scsi.flags = 0; 6815 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6816 xpt_set_transfer_settings(&cts, path->device, 6817 /*async_update*/TRUE); 6818 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6819 xpt_set_transfer_settings(&cts, path->device, 6820 /*async_update*/TRUE); 6821 } 6822 } 6823 6824 static void 6825 xpt_start_tags(struct cam_path *path) 6826 { 6827 struct ccb_relsim crs; 6828 struct cam_ed *device; 6829 struct cam_sim *sim; 6830 int newopenings; 6831 6832 device = path->device; 6833 sim = path->bus->sim; 6834 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6835 xpt_freeze_devq(path, /*count*/1); 6836 device->inq_flags |= SID_CmdQue; 6837 if (device->tag_saved_openings != 0) 6838 newopenings = device->tag_saved_openings; 6839 else 6840 newopenings = min(device->quirk->maxtags, 6841 sim->max_tagged_dev_openings); 6842 xpt_dev_ccbq_resize(path, newopenings); 6843 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6844 crs.ccb_h.func_code = XPT_REL_SIMQ; 6845 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6846 crs.openings 6847 = crs.release_timeout 6848 = crs.qfrozen_cnt 6849 = 0; 6850 xpt_action((union ccb *)&crs); 6851 } 6852 6853 static int busses_to_config; 6854 static int busses_to_reset; 6855 6856 static int 6857 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6858 { 6859 6860 sim_lock_assert_owned(bus->sim->lock); 6861 6862 if (bus->path_id != CAM_XPT_PATH_ID) { 6863 struct cam_path path; 6864 struct ccb_pathinq cpi; 6865 int can_negotiate; 6866 6867 busses_to_config++; 6868 xpt_compile_path(&path, NULL, bus->path_id, 6869 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6870 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6871 cpi.ccb_h.func_code = XPT_PATH_INQ; 6872 xpt_action((union ccb *)&cpi); 6873 can_negotiate = cpi.hba_inquiry; 6874 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6875 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6876 && can_negotiate) 6877 busses_to_reset++; 6878 xpt_release_path(&path); 6879 } 6880 6881 return(1); 6882 } 6883 6884 static int 6885 xptconfigfunc(struct cam_eb *bus, void *arg) 6886 { 6887 struct cam_path *path; 6888 union ccb *work_ccb; 6889 6890 sim_lock_assert_owned(bus->sim->lock); 6891 6892 if (bus->path_id != CAM_XPT_PATH_ID) { 6893 cam_status status; 6894 int can_negotiate; 6895 6896 work_ccb = xpt_alloc_ccb(); 6897 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6898 CAM_TARGET_WILDCARD, 6899 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6900 kprintf("xptconfigfunc: xpt_create_path failed with " 6901 "status %#x for bus %d\n", status, bus->path_id); 6902 kprintf("xptconfigfunc: halting bus configuration\n"); 6903 xpt_free_ccb(work_ccb); 6904 busses_to_config--; 6905 xpt_finishconfig(xpt_periph, NULL); 6906 return(0); 6907 } 6908 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6909 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6910 xpt_action(work_ccb); 6911 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6912 kprintf("xptconfigfunc: CPI failed on bus %d " 6913 "with status %d\n", bus->path_id, 6914 work_ccb->ccb_h.status); 6915 xpt_finishconfig(xpt_periph, work_ccb); 6916 return(1); 6917 } 6918 6919 can_negotiate = work_ccb->cpi.hba_inquiry; 6920 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6921 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6922 && (can_negotiate != 0)) { 6923 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6924 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6925 work_ccb->ccb_h.cbfcnp = NULL; 6926 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6927 ("Resetting Bus\n")); 6928 xpt_action(work_ccb); 6929 xpt_finishconfig(xpt_periph, work_ccb); 6930 } else { 6931 /* Act as though we performed a successful BUS RESET */ 6932 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6933 xpt_finishconfig(xpt_periph, work_ccb); 6934 } 6935 } 6936 6937 return(1); 6938 } 6939 6940 static void 6941 xpt_config(void *arg) 6942 { 6943 /* 6944 * Now that interrupts are enabled, go find our devices 6945 */ 6946 6947 #ifdef CAMDEBUG 6948 /* Setup debugging flags and path */ 6949 #ifdef CAM_DEBUG_FLAGS 6950 cam_dflags = CAM_DEBUG_FLAGS; 6951 #else /* !CAM_DEBUG_FLAGS */ 6952 cam_dflags = CAM_DEBUG_NONE; 6953 #endif /* CAM_DEBUG_FLAGS */ 6954 #ifdef CAM_DEBUG_BUS 6955 if (cam_dflags != CAM_DEBUG_NONE) { 6956 /* 6957 * Locking is specifically omitted here. No SIMs have 6958 * registered yet, so xpt_create_path will only be searching 6959 * empty lists of targets and devices. 6960 */ 6961 if (xpt_create_path(&cam_dpath, xpt_periph, 6962 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6963 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6964 kprintf("xpt_config: xpt_create_path() failed for debug" 6965 " target %d:%d:%d, debugging disabled\n", 6966 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6967 cam_dflags = CAM_DEBUG_NONE; 6968 } 6969 } else 6970 cam_dpath = NULL; 6971 #else /* !CAM_DEBUG_BUS */ 6972 cam_dpath = NULL; 6973 #endif /* CAM_DEBUG_BUS */ 6974 #endif /* CAMDEBUG */ 6975 6976 /* 6977 * Scan all installed busses. 6978 */ 6979 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6980 6981 if (busses_to_config == 0) { 6982 /* Call manually because we don't have any busses */ 6983 xpt_finishconfig(xpt_periph, NULL); 6984 } else { 6985 if (busses_to_reset > 0 && scsi_delay >= 2000) { 6986 kprintf("Waiting %d seconds for SCSI " 6987 "devices to settle\n", scsi_delay/1000); 6988 } 6989 xpt_for_all_busses(xptconfigfunc, NULL); 6990 } 6991 } 6992 6993 /* 6994 * If the given device only has one peripheral attached to it, and if that 6995 * peripheral is the passthrough driver, announce it. This insures that the 6996 * user sees some sort of announcement for every peripheral in their system. 6997 */ 6998 static int 6999 xptpassannouncefunc(struct cam_ed *device, void *arg) 7000 { 7001 struct cam_periph *periph; 7002 int i; 7003 7004 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 7005 periph = SLIST_NEXT(periph, periph_links), i++); 7006 7007 periph = SLIST_FIRST(&device->periphs); 7008 if ((i == 1) 7009 && (strncmp(periph->periph_name, "pass", 4) == 0)) 7010 xpt_announce_periph(periph, NULL); 7011 7012 return(1); 7013 } 7014 7015 static void 7016 xpt_finishconfig_task(void *context, int pending) 7017 { 7018 struct periph_driver **p_drv; 7019 int i; 7020 7021 if (busses_to_config == 0) { 7022 /* Register all the peripheral drivers */ 7023 /* XXX This will have to change when we have loadable modules */ 7024 p_drv = periph_drivers; 7025 for (i = 0; p_drv[i] != NULL; i++) { 7026 (*p_drv[i]->init)(); 7027 } 7028 7029 /* 7030 * Check for devices with no "standard" peripheral driver 7031 * attached. For any devices like that, announce the 7032 * passthrough driver so the user will see something. 7033 */ 7034 xpt_for_all_devices(xptpassannouncefunc, NULL); 7035 7036 /* Release our hook so that the boot can continue. */ 7037 config_intrhook_disestablish(xsoftc.xpt_config_hook); 7038 kfree(xsoftc.xpt_config_hook, M_CAMXPT); 7039 xsoftc.xpt_config_hook = NULL; 7040 } 7041 7042 kfree(context, M_CAMXPT); 7043 } 7044 7045 static void 7046 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 7047 { 7048 struct xpt_task *task; 7049 7050 if (done_ccb != NULL) { 7051 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 7052 ("xpt_finishconfig\n")); 7053 switch(done_ccb->ccb_h.func_code) { 7054 case XPT_RESET_BUS: 7055 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 7056 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 7057 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 7058 done_ccb->crcn.flags = 0; 7059 xpt_action(done_ccb); 7060 return; 7061 } 7062 /* FALLTHROUGH */ 7063 case XPT_SCAN_BUS: 7064 default: 7065 xpt_free_path(done_ccb->ccb_h.path); 7066 busses_to_config--; 7067 break; 7068 } 7069 } 7070 7071 if (busses_to_config == 0) { 7072 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, M_INTWAIT); 7073 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 7074 taskqueue_enqueue(taskqueue_thread[mycpuid], &task->task); 7075 } 7076 7077 if (done_ccb != NULL) 7078 xpt_free_ccb(done_ccb); 7079 } 7080 7081 cam_status 7082 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 7083 struct cam_path *path) 7084 { 7085 struct ccb_setasync csa; 7086 cam_status status; 7087 int xptpath = 0; 7088 7089 if (path == NULL) { 7090 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7091 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 7092 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 7093 if (status != CAM_REQ_CMP) { 7094 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7095 return (status); 7096 } 7097 xptpath = 1; 7098 } 7099 7100 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 7101 csa.ccb_h.func_code = XPT_SASYNC_CB; 7102 csa.event_enable = event; 7103 csa.callback = cbfunc; 7104 csa.callback_arg = cbarg; 7105 xpt_action((union ccb *)&csa); 7106 status = csa.ccb_h.status; 7107 if (xptpath) { 7108 xpt_free_path(path); 7109 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7110 } 7111 return (status); 7112 } 7113 7114 static void 7115 xptaction(struct cam_sim *sim, union ccb *work_ccb) 7116 { 7117 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 7118 7119 switch (work_ccb->ccb_h.func_code) { 7120 /* Common cases first */ 7121 case XPT_PATH_INQ: /* Path routing inquiry */ 7122 { 7123 struct ccb_pathinq *cpi; 7124 7125 cpi = &work_ccb->cpi; 7126 cpi->version_num = 1; /* XXX??? */ 7127 cpi->hba_inquiry = 0; 7128 cpi->target_sprt = 0; 7129 cpi->hba_misc = 0; 7130 cpi->hba_eng_cnt = 0; 7131 cpi->max_target = 0; 7132 cpi->max_lun = 0; 7133 cpi->initiator_id = 0; 7134 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 7135 strncpy(cpi->hba_vid, "", HBA_IDLEN); 7136 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 7137 cpi->unit_number = sim->unit_number; 7138 cpi->bus_id = sim->bus_id; 7139 cpi->base_transfer_speed = 0; 7140 cpi->protocol = PROTO_UNSPECIFIED; 7141 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 7142 cpi->transport = XPORT_UNSPECIFIED; 7143 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 7144 cpi->ccb_h.status = CAM_REQ_CMP; 7145 xpt_done(work_ccb); 7146 break; 7147 } 7148 default: 7149 work_ccb->ccb_h.status = CAM_REQ_INVALID; 7150 xpt_done(work_ccb); 7151 break; 7152 } 7153 } 7154 7155 /* 7156 * The xpt as a "controller" has no interrupt sources, so polling 7157 * is a no-op. 7158 */ 7159 static void 7160 xptpoll(struct cam_sim *sim) 7161 { 7162 } 7163 7164 void 7165 xpt_lock_buses(void) 7166 { 7167 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 7168 } 7169 7170 void 7171 xpt_unlock_buses(void) 7172 { 7173 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 7174 } 7175 7176 7177 /* 7178 * Should only be called by the machine interrupt dispatch routines, 7179 * so put these prototypes here instead of in the header. 7180 */ 7181 7182 static void 7183 swi_cambio(void *arg, void *frame) 7184 { 7185 camisr(NULL); 7186 } 7187 7188 static void 7189 camisr(void *dummy) 7190 { 7191 cam_simq_t queue; 7192 struct cam_sim *sim; 7193 7194 spin_lock_wr(&cam_simq_spin); 7195 TAILQ_INIT(&queue); 7196 TAILQ_CONCAT(&queue, &cam_simq, links); 7197 spin_unlock_wr(&cam_simq_spin); 7198 7199 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 7200 TAILQ_REMOVE(&queue, sim, links); 7201 CAM_SIM_LOCK(sim); 7202 sim->flags &= ~CAM_SIM_ON_DONEQ; 7203 camisr_runqueue(sim); 7204 CAM_SIM_UNLOCK(sim); 7205 } 7206 } 7207 7208 static void 7209 camisr_runqueue(struct cam_sim *sim) 7210 { 7211 struct ccb_hdr *ccb_h; 7212 int runq; 7213 7214 spin_lock_wr(&sim->sim_spin); 7215 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { 7216 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); 7217 spin_unlock_wr(&sim->sim_spin); 7218 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 7219 7220 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 7221 ("camisr\n")); 7222 7223 runq = FALSE; 7224 7225 if (ccb_h->flags & CAM_HIGH_POWER) { 7226 struct highpowerlist *hphead; 7227 struct cam_ed *device; 7228 union ccb *send_ccb; 7229 7230 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7231 hphead = &xsoftc.highpowerq; 7232 7233 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 7234 7235 /* 7236 * Increment the count since this command is done. 7237 */ 7238 xsoftc.num_highpower++; 7239 7240 /* 7241 * Any high powered commands queued up? 7242 */ 7243 if (send_ccb != NULL) { 7244 device = send_ccb->ccb_h.path->device; 7245 7246 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 7247 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7248 7249 xpt_release_devq(send_ccb->ccb_h.path, 7250 /*count*/1, /*runqueue*/TRUE); 7251 } else 7252 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7253 } 7254 7255 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 7256 struct cam_ed *dev; 7257 7258 dev = ccb_h->path->device; 7259 7260 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 7261 7262 /* 7263 * devq may be NULL if this is cam_dead_sim 7264 */ 7265 if (ccb_h->path->bus->sim->devq) { 7266 ccb_h->path->bus->sim->devq->send_active--; 7267 ccb_h->path->bus->sim->devq->send_openings++; 7268 } 7269 7270 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 7271 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 7272 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 7273 && (dev->ccbq.dev_active == 0))) { 7274 7275 xpt_release_devq(ccb_h->path, /*count*/1, 7276 /*run_queue*/TRUE); 7277 } 7278 7279 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 7280 && (--dev->tag_delay_count == 0)) 7281 xpt_start_tags(ccb_h->path); 7282 7283 if ((dev->ccbq.queue.entries > 0) 7284 && (dev->qfrozen_cnt == 0) 7285 && (device_is_send_queued(dev) == 0)) { 7286 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 7287 dev); 7288 } 7289 } 7290 7291 if (ccb_h->status & CAM_RELEASE_SIMQ) { 7292 xpt_release_simq(ccb_h->path->bus->sim, 7293 /*run_queue*/TRUE); 7294 ccb_h->status &= ~CAM_RELEASE_SIMQ; 7295 runq = FALSE; 7296 } 7297 7298 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 7299 && (ccb_h->status & CAM_DEV_QFRZN)) { 7300 xpt_release_devq(ccb_h->path, /*count*/1, 7301 /*run_queue*/TRUE); 7302 ccb_h->status &= ~CAM_DEV_QFRZN; 7303 } else if (runq) { 7304 xpt_run_dev_sendq(ccb_h->path->bus); 7305 } 7306 7307 /* Call the peripheral driver's callback */ 7308 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 7309 spin_lock_wr(&sim->sim_spin); 7310 } 7311 spin_unlock_wr(&sim->sim_spin); 7312 } 7313 7314 /* 7315 * The dead_sim isn't completely hooked into CAM, we have to make sure 7316 * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() 7317 * doesn't block. 7318 */ 7319 static void 7320 dead_sim_action(struct cam_sim *sim, union ccb *ccb) 7321 { 7322 7323 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 7324 xpt_done(ccb); 7325 camisr_runqueue(sim); 7326 } 7327 7328 static void 7329 dead_sim_poll(struct cam_sim *sim) 7330 { 7331 } 7332