1 /* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ 30 */ 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/types.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/time.h> 37 #include <sys/conf.h> 38 #include <sys/device.h> 39 #include <sys/fcntl.h> 40 #include <sys/md5.h> 41 #include <sys/devicestat.h> 42 #include <sys/interrupt.h> 43 #include <sys/sbuf.h> 44 #include <sys/taskqueue.h> 45 #include <sys/bus.h> 46 #include <sys/thread.h> 47 #include <sys/lock.h> 48 #include <sys/spinlock.h> 49 50 #include <sys/thread2.h> 51 #include <sys/spinlock2.h> 52 53 #include <machine/clock.h> 54 #include <machine/stdarg.h> 55 56 #include "cam.h" 57 #include "cam_ccb.h" 58 #include "cam_periph.h" 59 #include "cam_sim.h" 60 #include "cam_xpt.h" 61 #include "cam_xpt_sim.h" 62 #include "cam_xpt_periph.h" 63 #include "cam_debug.h" 64 65 #include "scsi/scsi_all.h" 66 #include "scsi/scsi_message.h" 67 #include "scsi/scsi_pass.h" 68 #include <sys/kthread.h> 69 #include "opt_cam.h" 70 71 /* Datastructures internal to the xpt layer */ 72 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 73 74 /* Object for defering XPT actions to a taskqueue */ 75 struct xpt_task { 76 struct task task; 77 void *data1; 78 uintptr_t data2; 79 }; 80 81 /* 82 * Definition of an async handler callback block. These are used to add 83 * SIMs and peripherals to the async callback lists. 84 */ 85 struct async_node { 86 SLIST_ENTRY(async_node) links; 87 u_int32_t event_enable; /* Async Event enables */ 88 void (*callback)(void *arg, u_int32_t code, 89 struct cam_path *path, void *args); 90 void *callback_arg; 91 }; 92 93 SLIST_HEAD(async_list, async_node); 94 SLIST_HEAD(periph_list, cam_periph); 95 96 /* 97 * This is the maximum number of high powered commands (e.g. start unit) 98 * that can be outstanding at a particular time. 99 */ 100 #ifndef CAM_MAX_HIGHPOWER 101 #define CAM_MAX_HIGHPOWER 4 102 #endif 103 104 /* 105 * Structure for queueing a device in a run queue. 106 * There is one run queue for allocating new ccbs, 107 * and another for sending ccbs to the controller. 108 */ 109 struct cam_ed_qinfo { 110 cam_pinfo pinfo; 111 struct cam_ed *device; 112 }; 113 114 /* 115 * The CAM EDT (Existing Device Table) contains the device information for 116 * all devices for all busses in the system. The table contains a 117 * cam_ed structure for each device on the bus. 118 */ 119 struct cam_ed { 120 TAILQ_ENTRY(cam_ed) links; 121 struct cam_ed_qinfo alloc_ccb_entry; 122 struct cam_ed_qinfo send_ccb_entry; 123 struct cam_et *target; 124 struct cam_sim *sim; 125 lun_id_t lun_id; 126 struct camq drvq; /* 127 * Queue of type drivers wanting to do 128 * work on this device. 129 */ 130 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 131 struct async_list asyncs; /* Async callback info for this B/T/L */ 132 struct periph_list periphs; /* All attached devices */ 133 u_int generation; /* Generation number */ 134 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 135 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 136 /* Storage for the inquiry data */ 137 cam_proto protocol; 138 u_int protocol_version; 139 cam_xport transport; 140 u_int transport_version; 141 struct scsi_inquiry_data inq_data; 142 u_int8_t inq_flags; /* 143 * Current settings for inquiry flags. 144 * This allows us to override settings 145 * like disconnection and tagged 146 * queuing for a device. 147 */ 148 u_int8_t queue_flags; /* Queue flags from the control page */ 149 u_int8_t serial_num_len; 150 u_int8_t *serial_num; 151 u_int32_t qfrozen_cnt; 152 u_int32_t flags; 153 #define CAM_DEV_UNCONFIGURED 0x01 154 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 155 #define CAM_DEV_REL_ON_COMPLETE 0x04 156 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 157 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 158 #define CAM_DEV_TAG_AFTER_COUNT 0x20 159 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 160 #define CAM_DEV_IN_DV 0x80 161 #define CAM_DEV_DV_HIT_BOTTOM 0x100 162 u_int32_t tag_delay_count; 163 #define CAM_TAG_DELAY_COUNT 5 164 u_int32_t tag_saved_openings; 165 u_int32_t refcount; 166 struct callout callout; 167 }; 168 169 /* 170 * Each target is represented by an ET (Existing Target). These 171 * entries are created when a target is successfully probed with an 172 * identify, and removed when a device fails to respond after a number 173 * of retries, or a bus rescan finds the device missing. 174 */ 175 struct cam_et { 176 TAILQ_HEAD(, cam_ed) ed_entries; 177 TAILQ_ENTRY(cam_et) links; 178 struct cam_eb *bus; 179 target_id_t target_id; 180 u_int32_t refcount; 181 u_int generation; 182 struct timeval last_reset; /* uptime of last reset */ 183 }; 184 185 /* 186 * Each bus is represented by an EB (Existing Bus). These entries 187 * are created by calls to xpt_bus_register and deleted by calls to 188 * xpt_bus_deregister. 189 */ 190 struct cam_eb { 191 TAILQ_HEAD(, cam_et) et_entries; 192 TAILQ_ENTRY(cam_eb) links; 193 path_id_t path_id; 194 struct cam_sim *sim; 195 struct timeval last_reset; /* uptime of last reset */ 196 u_int32_t flags; 197 #define CAM_EB_RUNQ_SCHEDULED 0x01 198 u_int32_t refcount; 199 u_int generation; 200 int counted_to_config; /* busses_to_config */ 201 }; 202 203 struct cam_path { 204 struct cam_periph *periph; 205 struct cam_eb *bus; 206 struct cam_et *target; 207 struct cam_ed *device; 208 }; 209 210 struct xpt_quirk_entry { 211 struct scsi_inquiry_pattern inq_pat; 212 u_int8_t quirks; 213 #define CAM_QUIRK_NOLUNS 0x01 214 #define CAM_QUIRK_NOSERIAL 0x02 215 #define CAM_QUIRK_HILUNS 0x04 216 #define CAM_QUIRK_NOHILUNS 0x08 217 u_int mintags; 218 u_int maxtags; 219 }; 220 221 static int cam_srch_hi = 0; 222 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi); 223 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS); 224 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0, 225 sysctl_cam_search_luns, "I", 226 "allow search above LUN 7 for SCSI3 and greater devices"); 227 228 #define CAM_SCSI2_MAXLUN 8 229 /* 230 * If we're not quirked to search <= the first 8 luns 231 * and we are either quirked to search above lun 8, 232 * or we're > SCSI-2 and we've enabled hilun searching, 233 * or we're > SCSI-2 and the last lun was a success, 234 * we can look for luns above lun 8. 235 */ 236 #define CAN_SRCH_HI_SPARSE(dv) \ 237 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 238 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 239 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi))) 240 241 #define CAN_SRCH_HI_DENSE(dv) \ 242 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 243 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 244 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))) 245 246 typedef enum { 247 XPT_FLAG_OPEN = 0x01 248 } xpt_flags; 249 250 struct xpt_softc { 251 xpt_flags flags; 252 u_int32_t xpt_generation; 253 254 /* number of high powered commands that can go through right now */ 255 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 256 int num_highpower; 257 258 /* queue for handling async rescan requests. */ 259 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 260 int ccb_scanq_running; 261 262 /* Registered busses */ 263 TAILQ_HEAD(,cam_eb) xpt_busses; 264 u_int bus_generation; 265 266 struct intr_config_hook *xpt_config_hook; 267 268 struct lock xpt_topo_lock; 269 struct lock xpt_lock; 270 }; 271 272 static const char quantum[] = "QUANTUM"; 273 static const char sony[] = "SONY"; 274 static const char west_digital[] = "WDIGTL"; 275 static const char samsung[] = "SAMSUNG"; 276 static const char seagate[] = "SEAGATE"; 277 static const char microp[] = "MICROP"; 278 279 static struct xpt_quirk_entry xpt_quirk_table[] = 280 { 281 { 282 /* Reports QUEUE FULL for temporary resource shortages */ 283 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 284 /*quirks*/0, /*mintags*/24, /*maxtags*/32 285 }, 286 { 287 /* Reports QUEUE FULL for temporary resource shortages */ 288 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 289 /*quirks*/0, /*mintags*/24, /*maxtags*/32 290 }, 291 { 292 /* Reports QUEUE FULL for temporary resource shortages */ 293 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 294 /*quirks*/0, /*mintags*/24, /*maxtags*/32 295 }, 296 { 297 /* Broken tagged queuing drive */ 298 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 299 /*quirks*/0, /*mintags*/0, /*maxtags*/0 300 }, 301 { 302 /* Broken tagged queuing drive */ 303 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 304 /*quirks*/0, /*mintags*/0, /*maxtags*/0 305 }, 306 { 307 /* Broken tagged queuing drive */ 308 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 309 /*quirks*/0, /*mintags*/0, /*maxtags*/0 310 }, 311 { 312 /* 313 * Unfortunately, the Quantum Atlas III has the same 314 * problem as the Atlas II drives above. 315 * Reported by: "Johan Granlund" <johan@granlund.nu> 316 * 317 * For future reference, the drive with the problem was: 318 * QUANTUM QM39100TD-SW N1B0 319 * 320 * It's possible that Quantum will fix the problem in later 321 * firmware revisions. If that happens, the quirk entry 322 * will need to be made specific to the firmware revisions 323 * with the problem. 324 * 325 */ 326 /* Reports QUEUE FULL for temporary resource shortages */ 327 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 328 /*quirks*/0, /*mintags*/24, /*maxtags*/32 329 }, 330 { 331 /* 332 * 18 Gig Atlas III, same problem as the 9G version. 333 * Reported by: Andre Albsmeier 334 * <andre.albsmeier@mchp.siemens.de> 335 * 336 * For future reference, the drive with the problem was: 337 * QUANTUM QM318000TD-S N491 338 */ 339 /* Reports QUEUE FULL for temporary resource shortages */ 340 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 341 /*quirks*/0, /*mintags*/24, /*maxtags*/32 342 }, 343 { 344 /* 345 * Broken tagged queuing drive 346 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 347 * and: Martin Renters <martin@tdc.on.ca> 348 */ 349 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 350 /*quirks*/0, /*mintags*/0, /*maxtags*/0 351 }, 352 /* 353 * The Seagate Medalist Pro drives have very poor write 354 * performance with anything more than 2 tags. 355 * 356 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 357 * Drive: <SEAGATE ST36530N 1444> 358 * 359 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 360 * Drive: <SEAGATE ST34520W 1281> 361 * 362 * No one has actually reported that the 9G version 363 * (ST39140*) of the Medalist Pro has the same problem, but 364 * we're assuming that it does because the 4G and 6.5G 365 * versions of the drive are broken. 366 */ 367 { 368 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 369 /*quirks*/0, /*mintags*/2, /*maxtags*/2 370 }, 371 { 372 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 373 /*quirks*/0, /*mintags*/2, /*maxtags*/2 374 }, 375 { 376 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 377 /*quirks*/0, /*mintags*/2, /*maxtags*/2 378 }, 379 { 380 /* 381 * Slow when tagged queueing is enabled. Write performance 382 * steadily drops off with more and more concurrent 383 * transactions. Best sequential write performance with 384 * tagged queueing turned off and write caching turned on. 385 * 386 * PR: kern/10398 387 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 388 * Drive: DCAS-34330 w/ "S65A" firmware. 389 * 390 * The drive with the problem had the "S65A" firmware 391 * revision, and has also been reported (by Stephen J. 392 * Roznowski <sjr@home.net>) for a drive with the "S61A" 393 * firmware revision. 394 * 395 * Although no one has reported problems with the 2 gig 396 * version of the DCAS drive, the assumption is that it 397 * has the same problems as the 4 gig version. Therefore 398 * this quirk entries disables tagged queueing for all 399 * DCAS drives. 400 */ 401 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 402 /*quirks*/0, /*mintags*/0, /*maxtags*/0 403 }, 404 { 405 /* Broken tagged queuing drive */ 406 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 407 /*quirks*/0, /*mintags*/0, /*maxtags*/0 408 }, 409 { 410 /* Broken tagged queuing drive */ 411 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 412 /*quirks*/0, /*mintags*/0, /*maxtags*/0 413 }, 414 { 415 /* This does not support other than LUN 0 */ 416 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" }, 417 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 418 }, 419 { 420 /* 421 * Broken tagged queuing drive. 422 * Submitted by: 423 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 424 * in PR kern/9535 425 */ 426 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 427 /*quirks*/0, /*mintags*/0, /*maxtags*/0 428 }, 429 { 430 /* 431 * Slow when tagged queueing is enabled. (1.5MB/sec versus 432 * 8MB/sec.) 433 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 434 * Best performance with these drives is achieved with 435 * tagged queueing turned off, and write caching turned on. 436 */ 437 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 438 /*quirks*/0, /*mintags*/0, /*maxtags*/0 439 }, 440 { 441 /* 442 * Slow when tagged queueing is enabled. (1.5MB/sec versus 443 * 8MB/sec.) 444 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 445 * Best performance with these drives is achieved with 446 * tagged queueing turned off, and write caching turned on. 447 */ 448 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 449 /*quirks*/0, /*mintags*/0, /*maxtags*/0 450 }, 451 { 452 /* 453 * Doesn't handle queue full condition correctly, 454 * so we need to limit maxtags to what the device 455 * can handle instead of determining this automatically. 456 */ 457 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 458 /*quirks*/0, /*mintags*/2, /*maxtags*/32 459 }, 460 { 461 /* Really only one LUN */ 462 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 463 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 464 }, 465 { 466 /* I can't believe we need a quirk for DPT volumes. */ 467 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 468 CAM_QUIRK_NOLUNS, 469 /*mintags*/0, /*maxtags*/255 470 }, 471 { 472 /* 473 * Many Sony CDROM drives don't like multi-LUN probing. 474 */ 475 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 476 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 477 }, 478 { 479 /* 480 * This drive doesn't like multiple LUN probing. 481 * Submitted by: Parag Patel <parag@cgt.com> 482 */ 483 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 484 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 485 }, 486 { 487 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 488 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 489 }, 490 { 491 /* 492 * The 8200 doesn't like multi-lun probing, and probably 493 * don't like serial number requests either. 494 */ 495 { 496 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 497 "EXB-8200*", "*" 498 }, 499 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 500 }, 501 { 502 /* 503 * Let's try the same as above, but for a drive that says 504 * it's an IPL-6860 but is actually an EXB 8200. 505 */ 506 { 507 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 508 "IPL-6860*", "*" 509 }, 510 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 511 }, 512 { 513 /* 514 * These Hitachi drives don't like multi-lun probing. 515 * The PR submitter has a DK319H, but says that the Linux 516 * kernel has a similar work-around for the DK312 and DK314, 517 * so all DK31* drives are quirked here. 518 * PR: misc/18793 519 * Submitted by: Paul Haddad <paul@pth.com> 520 */ 521 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 522 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 523 }, 524 { 525 /* 526 * The Hitachi CJ series with J8A8 firmware apparantly has 527 * problems with tagged commands. 528 * PR: 23536 529 * Reported by: amagai@nue.org 530 */ 531 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" }, 532 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 533 }, 534 { 535 /* 536 * These are the large storage arrays. 537 * Submitted by: William Carrel <william.carrel@infospace.com> 538 */ 539 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" }, 540 CAM_QUIRK_HILUNS, 2, 1024 541 }, 542 { 543 /* 544 * This old revision of the TDC3600 is also SCSI-1, and 545 * hangs upon serial number probing. 546 */ 547 { 548 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 549 " TDC 3600", "U07:" 550 }, 551 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 552 }, 553 { 554 /* 555 * Would repond to all LUNs if asked for. 556 */ 557 { 558 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 559 "CP150", "*" 560 }, 561 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 562 }, 563 { 564 /* 565 * Would repond to all LUNs if asked for. 566 */ 567 { 568 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 569 "96X2*", "*" 570 }, 571 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 572 }, 573 { 574 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 575 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 576 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 577 }, 578 { 579 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 580 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 581 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 582 }, 583 { 584 /* TeraSolutions special settings for TRC-22 RAID */ 585 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 586 /*quirks*/0, /*mintags*/55, /*maxtags*/255 587 }, 588 { 589 /* Veritas Storage Appliance */ 590 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 591 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 592 }, 593 { 594 /* 595 * Would respond to all LUNs. Device type and removable 596 * flag are jumper-selectable. 597 */ 598 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 599 "Tahiti 1", "*" 600 }, 601 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 602 }, 603 { 604 /* EasyRAID E5A aka. areca ARC-6010 */ 605 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" }, 606 CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255 607 }, 608 { 609 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" }, 610 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 611 }, 612 { 613 /* Default tagged queuing parameters for all devices */ 614 { 615 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 616 /*vendor*/"*", /*product*/"*", /*revision*/"*" 617 }, 618 /*quirks*/0, /*mintags*/2, /*maxtags*/255 619 }, 620 }; 621 622 static const int xpt_quirk_table_size = NELEM(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 static d_open_t xptopen; 684 static d_close_t xptclose; 685 static d_ioctl_t xptioctl; 686 687 static struct dev_ops xpt_ops = { 688 { "xpt", 0, D_MPSAFE }, 689 .d_open = xptopen, 690 .d_close = xptclose, 691 .d_ioctl = xptioctl 692 }; 693 694 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb); 695 static void dead_sim_poll(struct cam_sim *sim); 696 697 /* Dummy SIM that is used when the real one has gone. */ 698 static struct cam_sim cam_dead_sim; 699 static struct lock cam_dead_lock; 700 701 /* Storage for debugging datastructures */ 702 #ifdef CAMDEBUG 703 struct cam_path *cam_dpath; 704 u_int32_t cam_dflags; 705 u_int32_t cam_debug_delay; 706 #endif 707 708 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 709 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 710 #endif 711 712 /* 713 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 714 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 715 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 716 */ 717 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 718 || defined(CAM_DEBUG_LUN) 719 #ifdef CAMDEBUG 720 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 721 || !defined(CAM_DEBUG_LUN) 722 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 723 and CAM_DEBUG_LUN" 724 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 725 #else /* !CAMDEBUG */ 726 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 727 #endif /* CAMDEBUG */ 728 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 729 730 /* Our boot-time initialization hook */ 731 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 732 733 static moduledata_t cam_moduledata = { 734 "cam", 735 cam_module_event_handler, 736 NULL 737 }; 738 739 static int xpt_init(void *); 740 741 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 742 MODULE_VERSION(cam, 1); 743 744 745 static cam_status xpt_compile_path(struct cam_path *new_path, 746 struct cam_periph *perph, 747 path_id_t path_id, 748 target_id_t target_id, 749 lun_id_t lun_id); 750 751 static void xpt_release_path(struct cam_path *path); 752 753 static void xpt_async_bcast(struct async_list *async_head, 754 u_int32_t async_code, 755 struct cam_path *path, 756 void *async_arg); 757 static void xpt_dev_async(u_int32_t async_code, 758 struct cam_eb *bus, 759 struct cam_et *target, 760 struct cam_ed *device, 761 void *async_arg); 762 static path_id_t xptnextfreepathid(void); 763 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 764 static union ccb *xpt_get_ccb(struct cam_ed *device); 765 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 766 u_int32_t new_priority); 767 static void xpt_run_dev_allocq(struct cam_eb *bus); 768 static void xpt_run_dev_sendq(struct cam_eb *bus); 769 static timeout_t xpt_release_devq_timeout; 770 static void xpt_release_bus(struct cam_eb *bus); 771 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 772 int run_queue); 773 static struct cam_et* 774 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 775 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 776 static struct cam_ed* 777 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 778 lun_id_t lun_id); 779 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 780 struct cam_ed *device); 781 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 782 static struct cam_eb* 783 xpt_find_bus(path_id_t path_id); 784 static struct cam_et* 785 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 786 static struct cam_ed* 787 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 788 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 789 static void xpt_scan_lun(struct cam_periph *periph, 790 struct cam_path *path, cam_flags flags, 791 union ccb *ccb); 792 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 793 static xpt_busfunc_t xptconfigbuscountfunc; 794 static xpt_busfunc_t xptconfigfunc; 795 static void xpt_config(void *arg); 796 static xpt_devicefunc_t xptpassannouncefunc; 797 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 798 static void xpt_uncount_bus (struct cam_eb *bus); 799 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 800 static void xptpoll(struct cam_sim *sim); 801 static inthand2_t swi_cambio; 802 static void camisr(void *); 803 static void camisr_runqueue(struct cam_sim *); 804 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 805 u_int num_patterns, struct cam_eb *bus); 806 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 807 u_int num_patterns, 808 struct cam_ed *device); 809 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 810 u_int num_patterns, 811 struct cam_periph *periph); 812 static xpt_busfunc_t xptedtbusfunc; 813 static xpt_targetfunc_t xptedttargetfunc; 814 static xpt_devicefunc_t xptedtdevicefunc; 815 static xpt_periphfunc_t xptedtperiphfunc; 816 static xpt_pdrvfunc_t xptplistpdrvfunc; 817 static xpt_periphfunc_t xptplistperiphfunc; 818 static int xptedtmatch(struct ccb_dev_match *cdm); 819 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 820 static int xptbustraverse(struct cam_eb *start_bus, 821 xpt_busfunc_t *tr_func, void *arg); 822 static int xpttargettraverse(struct cam_eb *bus, 823 struct cam_et *start_target, 824 xpt_targetfunc_t *tr_func, void *arg); 825 static int xptdevicetraverse(struct cam_et *target, 826 struct cam_ed *start_device, 827 xpt_devicefunc_t *tr_func, void *arg); 828 static int xptperiphtraverse(struct cam_ed *device, 829 struct cam_periph *start_periph, 830 xpt_periphfunc_t *tr_func, void *arg); 831 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 832 xpt_pdrvfunc_t *tr_func, void *arg); 833 static int xptpdperiphtraverse(struct periph_driver **pdrv, 834 struct cam_periph *start_periph, 835 xpt_periphfunc_t *tr_func, 836 void *arg); 837 static xpt_busfunc_t xptdefbusfunc; 838 static xpt_targetfunc_t xptdeftargetfunc; 839 static xpt_devicefunc_t xptdefdevicefunc; 840 static xpt_periphfunc_t xptdefperiphfunc; 841 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 842 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 843 void *arg); 844 static xpt_devicefunc_t xptsetasyncfunc; 845 static xpt_busfunc_t xptsetasyncbusfunc; 846 static cam_status xptregister(struct cam_periph *periph, 847 void *arg); 848 static cam_status proberegister(struct cam_periph *periph, 849 void *arg); 850 static void probeschedule(struct cam_periph *probe_periph); 851 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 852 static void proberequestdefaultnegotiation(struct cam_periph *periph); 853 static int proberequestbackoff(struct cam_periph *periph, 854 struct cam_ed *device); 855 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 856 static void probecleanup(struct cam_periph *periph); 857 static void xpt_find_quirk(struct cam_ed *device); 858 static void xpt_devise_transport(struct cam_path *path); 859 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 860 struct cam_ed *device, 861 int async_update); 862 static void xpt_toggle_tags(struct cam_path *path); 863 static void xpt_start_tags(struct cam_path *path); 864 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 865 struct cam_ed *dev); 866 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 867 struct cam_ed *dev); 868 static __inline int periph_is_queued(struct cam_periph *periph); 869 static __inline int device_is_alloc_queued(struct cam_ed *device); 870 static __inline int device_is_send_queued(struct cam_ed *device); 871 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 872 873 static __inline int 874 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 875 { 876 int retval; 877 878 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 879 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 880 cam_ccbq_resize(&dev->ccbq, 881 dev->ccbq.dev_openings 882 + dev->ccbq.dev_active); 883 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 884 } 885 /* 886 * The priority of a device waiting for CCB resources 887 * is that of the the highest priority peripheral driver 888 * enqueued. 889 */ 890 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 891 &dev->alloc_ccb_entry.pinfo, 892 CAMQ_GET_HEAD(&dev->drvq)->priority); 893 } else { 894 retval = 0; 895 } 896 897 return (retval); 898 } 899 900 static __inline int 901 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 902 { 903 int retval; 904 905 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 906 /* 907 * The priority of a device waiting for controller 908 * resources is that of the the highest priority CCB 909 * enqueued. 910 */ 911 retval = 912 xpt_schedule_dev(&bus->sim->devq->send_queue, 913 &dev->send_ccb_entry.pinfo, 914 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 915 } else { 916 retval = 0; 917 } 918 return (retval); 919 } 920 921 static __inline int 922 periph_is_queued(struct cam_periph *periph) 923 { 924 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 925 } 926 927 static __inline int 928 device_is_alloc_queued(struct cam_ed *device) 929 { 930 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 931 } 932 933 static __inline int 934 device_is_send_queued(struct cam_ed *device) 935 { 936 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 937 } 938 939 static __inline int 940 dev_allocq_is_runnable(struct cam_devq *devq) 941 { 942 /* 943 * Have work to do. 944 * Have space to do more work. 945 * Allowed to do work. 946 */ 947 return ((devq->alloc_queue.qfrozen_cnt == 0) 948 && (devq->alloc_queue.entries > 0) 949 && (devq->alloc_openings > 0)); 950 } 951 952 static void 953 xpt_periph_init(void) 954 { 955 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 956 } 957 958 static void 959 probe_periph_init(void) 960 { 961 } 962 963 964 static void 965 xptdone(struct cam_periph *periph, union ccb *done_ccb) 966 { 967 /* Caller will release the CCB */ 968 wakeup(&done_ccb->ccb_h.cbfcnp); 969 } 970 971 static int 972 xptopen(struct dev_open_args *ap) 973 { 974 cdev_t dev = ap->a_head.a_dev; 975 976 /* 977 * Only allow read-write access. 978 */ 979 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) 980 return(EPERM); 981 982 /* 983 * We don't allow nonblocking access. 984 */ 985 if ((ap->a_oflags & O_NONBLOCK) != 0) { 986 kprintf("%s: can't do nonblocking access\n", devtoname(dev)); 987 return(ENODEV); 988 } 989 990 /* Mark ourselves open */ 991 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 992 xsoftc.flags |= XPT_FLAG_OPEN; 993 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 994 995 return(0); 996 } 997 998 static int 999 xptclose(struct dev_close_args *ap) 1000 { 1001 1002 /* Mark ourselves closed */ 1003 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 1004 xsoftc.flags &= ~XPT_FLAG_OPEN; 1005 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1006 1007 return(0); 1008 } 1009 1010 /* 1011 * Don't automatically grab the xpt softc lock here even though this is going 1012 * through the xpt device. The xpt device is really just a back door for 1013 * accessing other devices and SIMs, so the right thing to do is to grab 1014 * the appropriate SIM lock once the bus/SIM is located. 1015 */ 1016 static int 1017 xptioctl(struct dev_ioctl_args *ap) 1018 { 1019 int error; 1020 1021 error = 0; 1022 1023 switch(ap->a_cmd) { 1024 /* 1025 * For the transport layer CAMIOCOMMAND ioctl, we really only want 1026 * to accept CCB types that don't quite make sense to send through a 1027 * passthrough driver. 1028 */ 1029 case CAMIOCOMMAND: { 1030 union ccb *ccb; 1031 union ccb *inccb; 1032 struct cam_eb *bus; 1033 1034 inccb = (union ccb *)ap->a_data; 1035 1036 bus = xpt_find_bus(inccb->ccb_h.path_id); 1037 if (bus == NULL) { 1038 error = EINVAL; 1039 break; 1040 } 1041 1042 switch(inccb->ccb_h.func_code) { 1043 case XPT_SCAN_BUS: 1044 case XPT_RESET_BUS: 1045 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 1046 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 1047 error = EINVAL; 1048 break; 1049 } 1050 /* FALLTHROUGH */ 1051 case XPT_PATH_INQ: 1052 case XPT_ENG_INQ: 1053 case XPT_SCAN_LUN: 1054 1055 ccb = xpt_alloc_ccb(); 1056 1057 CAM_SIM_LOCK(bus->sim); 1058 1059 /* 1060 * Create a path using the bus, target, and lun the 1061 * user passed in. 1062 */ 1063 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1064 inccb->ccb_h.path_id, 1065 inccb->ccb_h.target_id, 1066 inccb->ccb_h.target_lun) != 1067 CAM_REQ_CMP){ 1068 error = EINVAL; 1069 CAM_SIM_UNLOCK(bus->sim); 1070 xpt_free_ccb(ccb); 1071 break; 1072 } 1073 /* Ensure all of our fields are correct */ 1074 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1075 inccb->ccb_h.pinfo.priority); 1076 xpt_merge_ccb(ccb, inccb); 1077 ccb->ccb_h.cbfcnp = xptdone; 1078 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1079 bcopy(ccb, inccb, sizeof(union ccb)); 1080 xpt_free_path(ccb->ccb_h.path); 1081 xpt_free_ccb(ccb); 1082 CAM_SIM_UNLOCK(bus->sim); 1083 break; 1084 1085 case XPT_DEBUG: { 1086 union ccb ccb; 1087 1088 /* 1089 * This is an immediate CCB, so it's okay to 1090 * allocate it on the stack. 1091 */ 1092 1093 CAM_SIM_LOCK(bus->sim); 1094 1095 /* 1096 * Create a path using the bus, target, and lun the 1097 * user passed in. 1098 */ 1099 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1100 inccb->ccb_h.path_id, 1101 inccb->ccb_h.target_id, 1102 inccb->ccb_h.target_lun) != 1103 CAM_REQ_CMP){ 1104 error = EINVAL; 1105 CAM_SIM_UNLOCK(bus->sim); 1106 break; 1107 } 1108 /* Ensure all of our fields are correct */ 1109 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1110 inccb->ccb_h.pinfo.priority); 1111 xpt_merge_ccb(&ccb, inccb); 1112 ccb.ccb_h.cbfcnp = xptdone; 1113 xpt_action(&ccb); 1114 CAM_SIM_UNLOCK(bus->sim); 1115 bcopy(&ccb, inccb, sizeof(union ccb)); 1116 xpt_free_path(ccb.ccb_h.path); 1117 break; 1118 1119 } 1120 case XPT_DEV_MATCH: { 1121 struct cam_periph_map_info mapinfo; 1122 struct cam_path *old_path; 1123 1124 /* 1125 * We can't deal with physical addresses for this 1126 * type of transaction. 1127 */ 1128 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1129 error = EINVAL; 1130 break; 1131 } 1132 1133 /* 1134 * Save this in case the caller had it set to 1135 * something in particular. 1136 */ 1137 old_path = inccb->ccb_h.path; 1138 1139 /* 1140 * We really don't need a path for the matching 1141 * code. The path is needed because of the 1142 * debugging statements in xpt_action(). They 1143 * assume that the CCB has a valid path. 1144 */ 1145 inccb->ccb_h.path = xpt_periph->path; 1146 1147 bzero(&mapinfo, sizeof(mapinfo)); 1148 1149 /* 1150 * Map the pattern and match buffers into kernel 1151 * virtual address space. 1152 */ 1153 error = cam_periph_mapmem(inccb, &mapinfo); 1154 1155 if (error) { 1156 inccb->ccb_h.path = old_path; 1157 break; 1158 } 1159 1160 /* 1161 * This is an immediate CCB, we can send it on directly. 1162 */ 1163 xpt_action(inccb); 1164 1165 /* 1166 * Map the buffers back into user space. 1167 */ 1168 cam_periph_unmapmem(inccb, &mapinfo); 1169 1170 inccb->ccb_h.path = old_path; 1171 1172 error = 0; 1173 break; 1174 } 1175 default: 1176 error = ENOTSUP; 1177 break; 1178 } 1179 xpt_release_bus(bus); 1180 break; 1181 } 1182 /* 1183 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1184 * with the periphal driver name and unit name filled in. The other 1185 * fields don't really matter as input. The passthrough driver name 1186 * ("pass"), and unit number are passed back in the ccb. The current 1187 * device generation number, and the index into the device peripheral 1188 * driver list, and the status are also passed back. Note that 1189 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1190 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1191 * (or rather should be) impossible for the device peripheral driver 1192 * list to change since we look at the whole thing in one pass, and 1193 * we do it with lock protection. 1194 * 1195 */ 1196 case CAMGETPASSTHRU: { 1197 union ccb *ccb; 1198 struct cam_periph *periph; 1199 struct periph_driver **p_drv; 1200 char *name; 1201 u_int unit; 1202 u_int cur_generation; 1203 int base_periph_found; 1204 int splbreaknum; 1205 1206 ccb = (union ccb *)ap->a_data; 1207 unit = ccb->cgdl.unit_number; 1208 name = ccb->cgdl.periph_name; 1209 /* 1210 * Every 100 devices, we want to drop our lock protection to 1211 * give the software interrupt handler a chance to run. 1212 * Most systems won't run into this check, but this should 1213 * avoid starvation in the software interrupt handler in 1214 * large systems. 1215 */ 1216 splbreaknum = 100; 1217 1218 ccb = (union ccb *)ap->a_data; 1219 1220 base_periph_found = 0; 1221 1222 /* 1223 * Sanity check -- make sure we don't get a null peripheral 1224 * driver name. 1225 */ 1226 if (*ccb->cgdl.periph_name == '\0') { 1227 error = EINVAL; 1228 break; 1229 } 1230 1231 /* Keep the list from changing while we traverse it */ 1232 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1233 ptstartover: 1234 cur_generation = xsoftc.xpt_generation; 1235 1236 /* first find our driver in the list of drivers */ 1237 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 1238 if (strcmp((*p_drv)->driver_name, name) == 0) 1239 break; 1240 } 1241 1242 if (*p_drv == NULL) { 1243 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1244 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1245 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1246 *ccb->cgdl.periph_name = '\0'; 1247 ccb->cgdl.unit_number = 0; 1248 error = ENOENT; 1249 break; 1250 } 1251 1252 /* 1253 * Run through every peripheral instance of this driver 1254 * and check to see whether it matches the unit passed 1255 * in by the user. If it does, get out of the loops and 1256 * find the passthrough driver associated with that 1257 * peripheral driver. 1258 */ 1259 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 1260 1261 if (periph->unit_number == unit) { 1262 break; 1263 } else if (--splbreaknum == 0) { 1264 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1265 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1266 splbreaknum = 100; 1267 if (cur_generation != xsoftc.xpt_generation) 1268 goto ptstartover; 1269 } 1270 } 1271 /* 1272 * If we found the peripheral driver that the user passed 1273 * in, go through all of the peripheral drivers for that 1274 * particular device and look for a passthrough driver. 1275 */ 1276 if (periph != NULL) { 1277 struct cam_ed *device; 1278 int i; 1279 1280 base_periph_found = 1; 1281 device = periph->path->device; 1282 for (i = 0, periph = SLIST_FIRST(&device->periphs); 1283 periph != NULL; 1284 periph = SLIST_NEXT(periph, periph_links), i++) { 1285 /* 1286 * Check to see whether we have a 1287 * passthrough device or not. 1288 */ 1289 if (strcmp(periph->periph_name, "pass") == 0) { 1290 /* 1291 * Fill in the getdevlist fields. 1292 */ 1293 strcpy(ccb->cgdl.periph_name, 1294 periph->periph_name); 1295 ccb->cgdl.unit_number = 1296 periph->unit_number; 1297 if (SLIST_NEXT(periph, periph_links)) 1298 ccb->cgdl.status = 1299 CAM_GDEVLIST_MORE_DEVS; 1300 else 1301 ccb->cgdl.status = 1302 CAM_GDEVLIST_LAST_DEVICE; 1303 ccb->cgdl.generation = 1304 device->generation; 1305 ccb->cgdl.index = i; 1306 /* 1307 * Fill in some CCB header fields 1308 * that the user may want. 1309 */ 1310 ccb->ccb_h.path_id = 1311 periph->path->bus->path_id; 1312 ccb->ccb_h.target_id = 1313 periph->path->target->target_id; 1314 ccb->ccb_h.target_lun = 1315 periph->path->device->lun_id; 1316 ccb->ccb_h.status = CAM_REQ_CMP; 1317 break; 1318 } 1319 } 1320 } 1321 1322 /* 1323 * If the periph is null here, one of two things has 1324 * happened. The first possibility is that we couldn't 1325 * find the unit number of the particular peripheral driver 1326 * that the user is asking about. e.g. the user asks for 1327 * the passthrough driver for "da11". We find the list of 1328 * "da" peripherals all right, but there is no unit 11. 1329 * The other possibility is that we went through the list 1330 * of peripheral drivers attached to the device structure, 1331 * but didn't find one with the name "pass". Either way, 1332 * we return ENOENT, since we couldn't find something. 1333 */ 1334 if (periph == NULL) { 1335 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1336 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1337 *ccb->cgdl.periph_name = '\0'; 1338 ccb->cgdl.unit_number = 0; 1339 error = ENOENT; 1340 /* 1341 * It is unfortunate that this is even necessary, 1342 * but there are many, many clueless users out there. 1343 * If this is true, the user is looking for the 1344 * passthrough driver, but doesn't have one in his 1345 * kernel. 1346 */ 1347 if (base_periph_found == 1) { 1348 kprintf("xptioctl: pass driver is not in the " 1349 "kernel\n"); 1350 kprintf("xptioctl: put \"device pass\" in " 1351 "your kernel config file\n"); 1352 } 1353 } 1354 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1355 break; 1356 } 1357 default: 1358 error = ENOTTY; 1359 break; 1360 } 1361 1362 return(error); 1363 } 1364 1365 static int 1366 cam_module_event_handler(module_t mod, int what, void *arg) 1367 { 1368 int error; 1369 1370 switch (what) { 1371 case MOD_LOAD: 1372 if ((error = xpt_init(NULL)) != 0) 1373 return (error); 1374 break; 1375 case MOD_UNLOAD: 1376 return EBUSY; 1377 default: 1378 return EOPNOTSUPP; 1379 } 1380 1381 return 0; 1382 } 1383 1384 /* 1385 * Thread to handle asynchronous main-context requests. 1386 * 1387 * This function is typically used by drivers to perform complex actions 1388 * such as bus scans and engineering requests in a main context instead 1389 * of an interrupt context. 1390 */ 1391 static void 1392 xpt_scanner_thread(void *dummy) 1393 { 1394 union ccb *ccb; 1395 struct cam_sim *sim; 1396 1397 for (;;) { 1398 xpt_lock_buses(); 1399 xsoftc.ccb_scanq_running = 1; 1400 while ((ccb = (void *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { 1401 TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, 1402 sim_links.tqe); 1403 xpt_unlock_buses(); 1404 1405 sim = ccb->ccb_h.path->bus->sim; 1406 CAM_SIM_LOCK(sim); 1407 xpt_action(ccb); 1408 CAM_SIM_UNLOCK(sim); 1409 1410 xpt_lock_buses(); 1411 } 1412 xsoftc.ccb_scanq_running = 0; 1413 tsleep_interlock(&xsoftc.ccb_scanq, 0); 1414 xpt_unlock_buses(); 1415 tsleep(&xsoftc.ccb_scanq, PINTERLOCKED, "ccb_scanq", 0); 1416 } 1417 } 1418 1419 /* 1420 * Issue an asynchronous asction 1421 */ 1422 void 1423 xpt_action_async(union ccb *ccb) 1424 { 1425 xpt_lock_buses(); 1426 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 1427 if (xsoftc.ccb_scanq_running == 0) { 1428 xsoftc.ccb_scanq_running = 1; 1429 wakeup(&xsoftc.ccb_scanq); 1430 } 1431 xpt_unlock_buses(); 1432 } 1433 1434 1435 /* Functions accessed by the peripheral drivers */ 1436 static int 1437 xpt_init(void *dummy) 1438 { 1439 struct cam_sim *xpt_sim; 1440 struct cam_path *path; 1441 struct cam_devq *devq; 1442 cam_status status; 1443 1444 TAILQ_INIT(&xsoftc.xpt_busses); 1445 TAILQ_INIT(&cam_simq); 1446 TAILQ_INIT(&xsoftc.ccb_scanq); 1447 STAILQ_INIT(&xsoftc.highpowerq); 1448 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 1449 1450 spin_init(&cam_simq_spin, "cam_simq_spin"); 1451 lockinit(&xsoftc.xpt_lock, "XPT lock", 0, LK_CANRECURSE); 1452 lockinit(&xsoftc.xpt_topo_lock, "XPT topology lock", 0, LK_CANRECURSE); 1453 1454 SLIST_INIT(&cam_dead_sim.ccb_freeq); 1455 TAILQ_INIT(&cam_dead_sim.sim_doneq); 1456 spin_init(&cam_dead_sim.sim_spin, "cam_dead_sim"); 1457 cam_dead_sim.sim_action = dead_sim_action; 1458 cam_dead_sim.sim_poll = dead_sim_poll; 1459 cam_dead_sim.sim_name = "dead_sim"; 1460 cam_dead_sim.lock = &cam_dead_lock; 1461 lockinit(&cam_dead_lock, "XPT dead_sim lock", 0, LK_CANRECURSE); 1462 cam_dead_sim.flags |= CAM_SIM_DEREGISTERED; 1463 1464 /* 1465 * The xpt layer is, itself, the equivelent of a SIM. 1466 * Allow 16 ccbs in the ccb pool for it. This should 1467 * give decent parallelism when we probe busses and 1468 * perform other XPT functions. 1469 */ 1470 devq = cam_simq_alloc(16); 1471 xpt_sim = cam_sim_alloc(xptaction, 1472 xptpoll, 1473 "xpt", 1474 /*softc*/NULL, 1475 /*unit*/0, 1476 /*lock*/&xsoftc.xpt_lock, 1477 /*max_dev_transactions*/0, 1478 /*max_tagged_dev_transactions*/0, 1479 devq); 1480 cam_simq_release(devq); 1481 if (xpt_sim == NULL) 1482 return (ENOMEM); 1483 1484 xpt_sim->max_ccbs = 16; 1485 1486 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 1487 if ((status = xpt_bus_register(xpt_sim, /*bus #*/0)) != CAM_SUCCESS) { 1488 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1489 kprintf("xpt_init: xpt_bus_register failed with status %#x," 1490 " failing attach\n", status); 1491 return (EINVAL); 1492 } 1493 1494 /* 1495 * Looking at the XPT from the SIM layer, the XPT is 1496 * the equivelent of a peripheral driver. Allocate 1497 * a peripheral driver entry for us. 1498 */ 1499 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1500 CAM_TARGET_WILDCARD, 1501 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1502 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1503 kprintf("xpt_init: xpt_create_path failed with status %#x," 1504 " failing attach\n", status); 1505 return (EINVAL); 1506 } 1507 1508 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1509 path, NULL, 0, xpt_sim); 1510 xpt_free_path(path); 1511 1512 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1513 1514 /* 1515 * Register a callback for when interrupts are enabled. 1516 */ 1517 xsoftc.xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1518 M_CAMXPT, M_INTWAIT | M_ZERO); 1519 xsoftc.xpt_config_hook->ich_func = xpt_config; 1520 xsoftc.xpt_config_hook->ich_desc = "xpt"; 1521 xsoftc.xpt_config_hook->ich_order = 1000; 1522 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 1523 kfree (xsoftc.xpt_config_hook, M_CAMXPT); 1524 kprintf("xpt_init: config_intrhook_establish failed " 1525 "- failing attach\n"); 1526 } 1527 1528 /* fire up rescan thread */ 1529 if (kthread_create(xpt_scanner_thread, NULL, NULL, "xpt_thrd")) { 1530 kprintf("xpt_init: failed to create rescan thread\n"); 1531 } 1532 /* Install our software interrupt handlers */ 1533 register_swi_mp(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL, -1); 1534 1535 return (0); 1536 } 1537 1538 static cam_status 1539 xptregister(struct cam_periph *periph, void *arg) 1540 { 1541 struct cam_sim *xpt_sim; 1542 1543 if (periph == NULL) { 1544 kprintf("xptregister: periph was NULL!!\n"); 1545 return(CAM_REQ_CMP_ERR); 1546 } 1547 1548 xpt_sim = (struct cam_sim *)arg; 1549 xpt_sim->softc = periph; 1550 xpt_periph = periph; 1551 periph->softc = NULL; 1552 1553 return(CAM_REQ_CMP); 1554 } 1555 1556 int32_t 1557 xpt_add_periph(struct cam_periph *periph) 1558 { 1559 struct cam_ed *device; 1560 int32_t status; 1561 struct periph_list *periph_head; 1562 1563 sim_lock_assert_owned(periph->sim->lock); 1564 1565 device = periph->path->device; 1566 1567 periph_head = &device->periphs; 1568 1569 status = CAM_REQ_CMP; 1570 1571 if (device != NULL) { 1572 /* 1573 * Make room for this peripheral 1574 * so it will fit in the queue 1575 * when it's scheduled to run 1576 */ 1577 status = camq_resize(&device->drvq, 1578 device->drvq.array_size + 1); 1579 1580 device->generation++; 1581 1582 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1583 } 1584 1585 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1586 xsoftc.xpt_generation++; 1587 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1588 1589 return (status); 1590 } 1591 1592 void 1593 xpt_remove_periph(struct cam_periph *periph) 1594 { 1595 struct cam_ed *device; 1596 1597 sim_lock_assert_owned(periph->sim->lock); 1598 1599 device = periph->path->device; 1600 1601 if (device != NULL) { 1602 struct periph_list *periph_head; 1603 1604 periph_head = &device->periphs; 1605 1606 /* Release the slot for this peripheral */ 1607 camq_resize(&device->drvq, device->drvq.array_size - 1); 1608 1609 device->generation++; 1610 1611 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1612 } 1613 1614 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1615 xsoftc.xpt_generation++; 1616 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1617 } 1618 1619 void 1620 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1621 { 1622 struct ccb_pathinq cpi; 1623 struct ccb_trans_settings cts; 1624 struct cam_path *path; 1625 u_int speed; 1626 u_int freq; 1627 u_int mb; 1628 1629 sim_lock_assert_owned(periph->sim->lock); 1630 1631 path = periph->path; 1632 1633 /* Report basic attachment and inquiry data */ 1634 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1635 periph->periph_name, periph->unit_number, 1636 path->bus->sim->sim_name, 1637 path->bus->sim->unit_number, 1638 path->bus->sim->bus_id, 1639 path->target->target_id, 1640 path->device->lun_id); 1641 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1642 scsi_print_inquiry(&path->device->inq_data); 1643 1644 /* Report serial number */ 1645 if (path->device->serial_num_len > 0) { 1646 /* Don't wrap the screen - print only the first 60 chars */ 1647 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1648 periph->unit_number, path->device->serial_num); 1649 } 1650 1651 /* Acquire and report transfer speed */ 1652 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1653 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1654 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1655 xpt_action((union ccb*)&cts); 1656 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1657 return; 1658 } 1659 1660 /* Ask the SIM for its base transfer speed */ 1661 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1662 cpi.ccb_h.func_code = XPT_PATH_INQ; 1663 xpt_action((union ccb *)&cpi); 1664 1665 speed = cpi.base_transfer_speed; 1666 freq = 0; 1667 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1668 struct ccb_trans_settings_spi *spi; 1669 1670 spi = &cts.xport_specific.spi; 1671 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1672 && spi->sync_offset != 0) { 1673 freq = scsi_calc_syncsrate(spi->sync_period); 1674 speed = freq; 1675 } 1676 1677 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1678 speed *= (0x01 << spi->bus_width); 1679 } 1680 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1681 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; 1682 if (fc->valid & CTS_FC_VALID_SPEED) { 1683 speed = fc->bitrate; 1684 } 1685 } 1686 1687 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { 1688 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; 1689 if (sas->valid & CTS_SAS_VALID_SPEED) { 1690 speed = sas->bitrate; 1691 } 1692 } 1693 1694 mb = speed / 1000; 1695 if (mb > 0) 1696 kprintf("%s%d: %d.%03dMB/s transfers", 1697 periph->periph_name, periph->unit_number, 1698 mb, speed % 1000); 1699 else 1700 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1701 periph->unit_number, speed); 1702 1703 /* Report additional information about SPI connections */ 1704 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1705 struct ccb_trans_settings_spi *spi; 1706 1707 spi = &cts.xport_specific.spi; 1708 if (freq != 0) { 1709 kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1710 freq % 1000, 1711 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1712 ? " DT" : "", 1713 spi->sync_offset); 1714 } 1715 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1716 && spi->bus_width > 0) { 1717 if (freq != 0) { 1718 kprintf(", "); 1719 } else { 1720 kprintf(" ("); 1721 } 1722 kprintf("%dbit)", 8 * (0x01 << spi->bus_width)); 1723 } else if (freq != 0) { 1724 kprintf(")"); 1725 } 1726 } 1727 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1728 struct ccb_trans_settings_fc *fc; 1729 1730 fc = &cts.xport_specific.fc; 1731 if (fc->valid & CTS_FC_VALID_WWNN) 1732 kprintf(" WWNN 0x%llx", (long long) fc->wwnn); 1733 if (fc->valid & CTS_FC_VALID_WWPN) 1734 kprintf(" WWPN 0x%llx", (long long) fc->wwpn); 1735 if (fc->valid & CTS_FC_VALID_PORT) 1736 kprintf(" PortID 0x%x", fc->port); 1737 } 1738 1739 if (path->device->inq_flags & SID_CmdQue 1740 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1741 kprintf("\n%s%d: Command Queueing Enabled", 1742 periph->periph_name, periph->unit_number); 1743 } 1744 kprintf("\n"); 1745 1746 /* 1747 * We only want to print the caller's announce string if they've 1748 * passed one in.. 1749 */ 1750 if (announce_string != NULL) 1751 kprintf("%s%d: %s\n", periph->periph_name, 1752 periph->unit_number, announce_string); 1753 } 1754 1755 static dev_match_ret 1756 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1757 struct cam_eb *bus) 1758 { 1759 dev_match_ret retval; 1760 int i; 1761 1762 retval = DM_RET_NONE; 1763 1764 /* 1765 * If we aren't given something to match against, that's an error. 1766 */ 1767 if (bus == NULL) 1768 return(DM_RET_ERROR); 1769 1770 /* 1771 * If there are no match entries, then this bus matches no 1772 * matter what. 1773 */ 1774 if ((patterns == NULL) || (num_patterns == 0)) 1775 return(DM_RET_DESCEND | DM_RET_COPY); 1776 1777 for (i = 0; i < num_patterns; i++) { 1778 struct bus_match_pattern *cur_pattern; 1779 1780 /* 1781 * If the pattern in question isn't for a bus node, we 1782 * aren't interested. However, we do indicate to the 1783 * calling routine that we should continue descending the 1784 * tree, since the user wants to match against lower-level 1785 * EDT elements. 1786 */ 1787 if (patterns[i].type != DEV_MATCH_BUS) { 1788 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1789 retval |= DM_RET_DESCEND; 1790 continue; 1791 } 1792 1793 cur_pattern = &patterns[i].pattern.bus_pattern; 1794 1795 /* 1796 * If they want to match any bus node, we give them any 1797 * device node. 1798 */ 1799 if (cur_pattern->flags == BUS_MATCH_ANY) { 1800 /* set the copy flag */ 1801 retval |= DM_RET_COPY; 1802 1803 /* 1804 * If we've already decided on an action, go ahead 1805 * and return. 1806 */ 1807 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1808 return(retval); 1809 } 1810 1811 /* 1812 * Not sure why someone would do this... 1813 */ 1814 if (cur_pattern->flags == BUS_MATCH_NONE) 1815 continue; 1816 1817 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1818 && (cur_pattern->path_id != bus->path_id)) 1819 continue; 1820 1821 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1822 && (cur_pattern->bus_id != bus->sim->bus_id)) 1823 continue; 1824 1825 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1826 && (cur_pattern->unit_number != bus->sim->unit_number)) 1827 continue; 1828 1829 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1830 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1831 DEV_IDLEN) != 0)) 1832 continue; 1833 1834 /* 1835 * If we get to this point, the user definitely wants 1836 * information on this bus. So tell the caller to copy the 1837 * data out. 1838 */ 1839 retval |= DM_RET_COPY; 1840 1841 /* 1842 * If the return action has been set to descend, then we 1843 * know that we've already seen a non-bus matching 1844 * expression, therefore we need to further descend the tree. 1845 * This won't change by continuing around the loop, so we 1846 * go ahead and return. If we haven't seen a non-bus 1847 * matching expression, we keep going around the loop until 1848 * we exhaust the matching expressions. We'll set the stop 1849 * flag once we fall out of the loop. 1850 */ 1851 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1852 return(retval); 1853 } 1854 1855 /* 1856 * If the return action hasn't been set to descend yet, that means 1857 * we haven't seen anything other than bus matching patterns. So 1858 * tell the caller to stop descending the tree -- the user doesn't 1859 * want to match against lower level tree elements. 1860 */ 1861 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1862 retval |= DM_RET_STOP; 1863 1864 return(retval); 1865 } 1866 1867 static dev_match_ret 1868 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1869 struct cam_ed *device) 1870 { 1871 dev_match_ret retval; 1872 int i; 1873 1874 retval = DM_RET_NONE; 1875 1876 /* 1877 * If we aren't given something to match against, that's an error. 1878 */ 1879 if (device == NULL) 1880 return(DM_RET_ERROR); 1881 1882 /* 1883 * If there are no match entries, then this device matches no 1884 * matter what. 1885 */ 1886 if ((patterns == NULL) || (num_patterns == 0)) 1887 return(DM_RET_DESCEND | DM_RET_COPY); 1888 1889 for (i = 0; i < num_patterns; i++) { 1890 struct device_match_pattern *cur_pattern; 1891 1892 /* 1893 * If the pattern in question isn't for a device node, we 1894 * aren't interested. 1895 */ 1896 if (patterns[i].type != DEV_MATCH_DEVICE) { 1897 if ((patterns[i].type == DEV_MATCH_PERIPH) 1898 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1899 retval |= DM_RET_DESCEND; 1900 continue; 1901 } 1902 1903 cur_pattern = &patterns[i].pattern.device_pattern; 1904 1905 /* 1906 * If they want to match any device node, we give them any 1907 * device node. 1908 */ 1909 if (cur_pattern->flags == DEV_MATCH_ANY) { 1910 /* set the copy flag */ 1911 retval |= DM_RET_COPY; 1912 1913 1914 /* 1915 * If we've already decided on an action, go ahead 1916 * and return. 1917 */ 1918 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1919 return(retval); 1920 } 1921 1922 /* 1923 * Not sure why someone would do this... 1924 */ 1925 if (cur_pattern->flags == DEV_MATCH_NONE) 1926 continue; 1927 1928 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1929 && (cur_pattern->path_id != device->target->bus->path_id)) 1930 continue; 1931 1932 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1933 && (cur_pattern->target_id != device->target->target_id)) 1934 continue; 1935 1936 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1937 && (cur_pattern->target_lun != device->lun_id)) 1938 continue; 1939 1940 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1941 && (cam_quirkmatch((caddr_t)&device->inq_data, 1942 (caddr_t)&cur_pattern->inq_pat, 1943 1, sizeof(cur_pattern->inq_pat), 1944 scsi_static_inquiry_match) == NULL)) 1945 continue; 1946 1947 /* 1948 * If we get to this point, the user definitely wants 1949 * information on this device. So tell the caller to copy 1950 * the data out. 1951 */ 1952 retval |= DM_RET_COPY; 1953 1954 /* 1955 * If the return action has been set to descend, then we 1956 * know that we've already seen a peripheral matching 1957 * expression, therefore we need to further descend the tree. 1958 * This won't change by continuing around the loop, so we 1959 * go ahead and return. If we haven't seen a peripheral 1960 * matching expression, we keep going around the loop until 1961 * we exhaust the matching expressions. We'll set the stop 1962 * flag once we fall out of the loop. 1963 */ 1964 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1965 return(retval); 1966 } 1967 1968 /* 1969 * If the return action hasn't been set to descend yet, that means 1970 * we haven't seen any peripheral matching patterns. So tell the 1971 * caller to stop descending the tree -- the user doesn't want to 1972 * match against lower level tree elements. 1973 */ 1974 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1975 retval |= DM_RET_STOP; 1976 1977 return(retval); 1978 } 1979 1980 /* 1981 * Match a single peripheral against any number of match patterns. 1982 */ 1983 static dev_match_ret 1984 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1985 struct cam_periph *periph) 1986 { 1987 dev_match_ret retval; 1988 int i; 1989 1990 /* 1991 * If we aren't given something to match against, that's an error. 1992 */ 1993 if (periph == NULL) 1994 return(DM_RET_ERROR); 1995 1996 /* 1997 * If there are no match entries, then this peripheral matches no 1998 * matter what. 1999 */ 2000 if ((patterns == NULL) || (num_patterns == 0)) 2001 return(DM_RET_STOP | DM_RET_COPY); 2002 2003 /* 2004 * There aren't any nodes below a peripheral node, so there's no 2005 * reason to descend the tree any further. 2006 */ 2007 retval = DM_RET_STOP; 2008 2009 for (i = 0; i < num_patterns; i++) { 2010 struct periph_match_pattern *cur_pattern; 2011 2012 /* 2013 * If the pattern in question isn't for a peripheral, we 2014 * aren't interested. 2015 */ 2016 if (patterns[i].type != DEV_MATCH_PERIPH) 2017 continue; 2018 2019 cur_pattern = &patterns[i].pattern.periph_pattern; 2020 2021 /* 2022 * If they want to match on anything, then we will do so. 2023 */ 2024 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 2025 /* set the copy flag */ 2026 retval |= DM_RET_COPY; 2027 2028 /* 2029 * We've already set the return action to stop, 2030 * since there are no nodes below peripherals in 2031 * the tree. 2032 */ 2033 return(retval); 2034 } 2035 2036 /* 2037 * Not sure why someone would do this... 2038 */ 2039 if (cur_pattern->flags == PERIPH_MATCH_NONE) 2040 continue; 2041 2042 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 2043 && (cur_pattern->path_id != periph->path->bus->path_id)) 2044 continue; 2045 2046 /* 2047 * For the target and lun id's, we have to make sure the 2048 * target and lun pointers aren't NULL. The xpt peripheral 2049 * has a wildcard target and device. 2050 */ 2051 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 2052 && ((periph->path->target == NULL) 2053 ||(cur_pattern->target_id != periph->path->target->target_id))) 2054 continue; 2055 2056 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 2057 && ((periph->path->device == NULL) 2058 || (cur_pattern->target_lun != periph->path->device->lun_id))) 2059 continue; 2060 2061 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 2062 && (cur_pattern->unit_number != periph->unit_number)) 2063 continue; 2064 2065 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 2066 && (strncmp(cur_pattern->periph_name, periph->periph_name, 2067 DEV_IDLEN) != 0)) 2068 continue; 2069 2070 /* 2071 * If we get to this point, the user definitely wants 2072 * information on this peripheral. So tell the caller to 2073 * copy the data out. 2074 */ 2075 retval |= DM_RET_COPY; 2076 2077 /* 2078 * The return action has already been set to stop, since 2079 * peripherals don't have any nodes below them in the EDT. 2080 */ 2081 return(retval); 2082 } 2083 2084 /* 2085 * If we get to this point, the peripheral that was passed in 2086 * doesn't match any of the patterns. 2087 */ 2088 return(retval); 2089 } 2090 2091 static int 2092 xptedtbusfunc(struct cam_eb *bus, void *arg) 2093 { 2094 struct ccb_dev_match *cdm; 2095 dev_match_ret retval; 2096 2097 cdm = (struct ccb_dev_match *)arg; 2098 2099 /* 2100 * If our position is for something deeper in the tree, that means 2101 * that we've already seen this node. So, we keep going down. 2102 */ 2103 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2104 && (cdm->pos.cookie.bus == bus) 2105 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2106 && (cdm->pos.cookie.target != NULL)) 2107 retval = DM_RET_DESCEND; 2108 else 2109 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 2110 2111 /* 2112 * If we got an error, bail out of the search. 2113 */ 2114 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2115 cdm->status = CAM_DEV_MATCH_ERROR; 2116 return(0); 2117 } 2118 2119 /* 2120 * If the copy flag is set, copy this bus out. 2121 */ 2122 if (retval & DM_RET_COPY) { 2123 int spaceleft, j; 2124 2125 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2126 sizeof(struct dev_match_result)); 2127 2128 /* 2129 * If we don't have enough space to put in another 2130 * match result, save our position and tell the 2131 * user there are more devices to check. 2132 */ 2133 if (spaceleft < sizeof(struct dev_match_result)) { 2134 bzero(&cdm->pos, sizeof(cdm->pos)); 2135 cdm->pos.position_type = 2136 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 2137 2138 cdm->pos.cookie.bus = bus; 2139 cdm->pos.generations[CAM_BUS_GENERATION]= 2140 xsoftc.bus_generation; 2141 cdm->status = CAM_DEV_MATCH_MORE; 2142 return(0); 2143 } 2144 j = cdm->num_matches; 2145 cdm->num_matches++; 2146 cdm->matches[j].type = DEV_MATCH_BUS; 2147 cdm->matches[j].result.bus_result.path_id = bus->path_id; 2148 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 2149 cdm->matches[j].result.bus_result.unit_number = 2150 bus->sim->unit_number; 2151 strncpy(cdm->matches[j].result.bus_result.dev_name, 2152 bus->sim->sim_name, DEV_IDLEN); 2153 } 2154 2155 /* 2156 * If the user is only interested in busses, there's no 2157 * reason to descend to the next level in the tree. 2158 */ 2159 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2160 return(1); 2161 2162 /* 2163 * If there is a target generation recorded, check it to 2164 * make sure the target list hasn't changed. 2165 */ 2166 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2167 && (bus == cdm->pos.cookie.bus) 2168 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2169 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 2170 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 2171 bus->generation)) { 2172 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2173 return(0); 2174 } 2175 2176 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2177 && (cdm->pos.cookie.bus == bus) 2178 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2179 && (cdm->pos.cookie.target != NULL)) 2180 return(xpttargettraverse(bus, 2181 (struct cam_et *)cdm->pos.cookie.target, 2182 xptedttargetfunc, arg)); 2183 else 2184 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 2185 } 2186 2187 static int 2188 xptedttargetfunc(struct cam_et *target, void *arg) 2189 { 2190 struct ccb_dev_match *cdm; 2191 2192 cdm = (struct ccb_dev_match *)arg; 2193 2194 /* 2195 * If there is a device list generation recorded, check it to 2196 * make sure the device list hasn't changed. 2197 */ 2198 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2199 && (cdm->pos.cookie.bus == target->bus) 2200 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2201 && (cdm->pos.cookie.target == target) 2202 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2203 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2204 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2205 target->generation)) { 2206 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2207 return(0); 2208 } 2209 2210 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2211 && (cdm->pos.cookie.bus == target->bus) 2212 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2213 && (cdm->pos.cookie.target == target) 2214 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2215 && (cdm->pos.cookie.device != NULL)) 2216 return(xptdevicetraverse(target, 2217 (struct cam_ed *)cdm->pos.cookie.device, 2218 xptedtdevicefunc, arg)); 2219 else 2220 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2221 } 2222 2223 static int 2224 xptedtdevicefunc(struct cam_ed *device, void *arg) 2225 { 2226 2227 struct ccb_dev_match *cdm; 2228 dev_match_ret retval; 2229 2230 cdm = (struct ccb_dev_match *)arg; 2231 2232 /* 2233 * If our position is for something deeper in the tree, that means 2234 * that we've already seen this node. So, we keep going down. 2235 */ 2236 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2237 && (cdm->pos.cookie.device == device) 2238 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2239 && (cdm->pos.cookie.periph != NULL)) 2240 retval = DM_RET_DESCEND; 2241 else 2242 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2243 device); 2244 2245 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2246 cdm->status = CAM_DEV_MATCH_ERROR; 2247 return(0); 2248 } 2249 2250 /* 2251 * If the copy flag is set, copy this device out. 2252 */ 2253 if (retval & DM_RET_COPY) { 2254 int spaceleft, j; 2255 2256 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2257 sizeof(struct dev_match_result)); 2258 2259 /* 2260 * If we don't have enough space to put in another 2261 * match result, save our position and tell the 2262 * user there are more devices to check. 2263 */ 2264 if (spaceleft < sizeof(struct dev_match_result)) { 2265 bzero(&cdm->pos, sizeof(cdm->pos)); 2266 cdm->pos.position_type = 2267 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2268 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2269 2270 cdm->pos.cookie.bus = device->target->bus; 2271 cdm->pos.generations[CAM_BUS_GENERATION]= 2272 xsoftc.bus_generation; 2273 cdm->pos.cookie.target = device->target; 2274 cdm->pos.generations[CAM_TARGET_GENERATION] = 2275 device->target->bus->generation; 2276 cdm->pos.cookie.device = device; 2277 cdm->pos.generations[CAM_DEV_GENERATION] = 2278 device->target->generation; 2279 cdm->status = CAM_DEV_MATCH_MORE; 2280 return(0); 2281 } 2282 j = cdm->num_matches; 2283 cdm->num_matches++; 2284 cdm->matches[j].type = DEV_MATCH_DEVICE; 2285 cdm->matches[j].result.device_result.path_id = 2286 device->target->bus->path_id; 2287 cdm->matches[j].result.device_result.target_id = 2288 device->target->target_id; 2289 cdm->matches[j].result.device_result.target_lun = 2290 device->lun_id; 2291 bcopy(&device->inq_data, 2292 &cdm->matches[j].result.device_result.inq_data, 2293 sizeof(struct scsi_inquiry_data)); 2294 2295 /* Let the user know whether this device is unconfigured */ 2296 if (device->flags & CAM_DEV_UNCONFIGURED) 2297 cdm->matches[j].result.device_result.flags = 2298 DEV_RESULT_UNCONFIGURED; 2299 else 2300 cdm->matches[j].result.device_result.flags = 2301 DEV_RESULT_NOFLAG; 2302 } 2303 2304 /* 2305 * If the user isn't interested in peripherals, don't descend 2306 * the tree any further. 2307 */ 2308 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2309 return(1); 2310 2311 /* 2312 * If there is a peripheral list generation recorded, make sure 2313 * it hasn't changed. 2314 */ 2315 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2316 && (device->target->bus == cdm->pos.cookie.bus) 2317 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2318 && (device->target == cdm->pos.cookie.target) 2319 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2320 && (device == cdm->pos.cookie.device) 2321 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2322 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2323 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2324 device->generation)){ 2325 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2326 return(0); 2327 } 2328 2329 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2330 && (cdm->pos.cookie.bus == device->target->bus) 2331 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2332 && (cdm->pos.cookie.target == device->target) 2333 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2334 && (cdm->pos.cookie.device == device) 2335 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2336 && (cdm->pos.cookie.periph != NULL)) 2337 return(xptperiphtraverse(device, 2338 (struct cam_periph *)cdm->pos.cookie.periph, 2339 xptedtperiphfunc, arg)); 2340 else 2341 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2342 } 2343 2344 static int 2345 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2346 { 2347 struct ccb_dev_match *cdm; 2348 dev_match_ret retval; 2349 2350 cdm = (struct ccb_dev_match *)arg; 2351 2352 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2353 2354 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2355 cdm->status = CAM_DEV_MATCH_ERROR; 2356 return(0); 2357 } 2358 2359 /* 2360 * If the copy flag is set, copy this peripheral out. 2361 */ 2362 if (retval & DM_RET_COPY) { 2363 int spaceleft, j; 2364 2365 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2366 sizeof(struct dev_match_result)); 2367 2368 /* 2369 * If we don't have enough space to put in another 2370 * match result, save our position and tell the 2371 * user there are more devices to check. 2372 */ 2373 if (spaceleft < sizeof(struct dev_match_result)) { 2374 bzero(&cdm->pos, sizeof(cdm->pos)); 2375 cdm->pos.position_type = 2376 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2377 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2378 CAM_DEV_POS_PERIPH; 2379 2380 cdm->pos.cookie.bus = periph->path->bus; 2381 cdm->pos.generations[CAM_BUS_GENERATION]= 2382 xsoftc.bus_generation; 2383 cdm->pos.cookie.target = periph->path->target; 2384 cdm->pos.generations[CAM_TARGET_GENERATION] = 2385 periph->path->bus->generation; 2386 cdm->pos.cookie.device = periph->path->device; 2387 cdm->pos.generations[CAM_DEV_GENERATION] = 2388 periph->path->target->generation; 2389 cdm->pos.cookie.periph = periph; 2390 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2391 periph->path->device->generation; 2392 cdm->status = CAM_DEV_MATCH_MORE; 2393 return(0); 2394 } 2395 2396 j = cdm->num_matches; 2397 cdm->num_matches++; 2398 cdm->matches[j].type = DEV_MATCH_PERIPH; 2399 cdm->matches[j].result.periph_result.path_id = 2400 periph->path->bus->path_id; 2401 cdm->matches[j].result.periph_result.target_id = 2402 periph->path->target->target_id; 2403 cdm->matches[j].result.periph_result.target_lun = 2404 periph->path->device->lun_id; 2405 cdm->matches[j].result.periph_result.unit_number = 2406 periph->unit_number; 2407 strncpy(cdm->matches[j].result.periph_result.periph_name, 2408 periph->periph_name, DEV_IDLEN); 2409 } 2410 2411 return(1); 2412 } 2413 2414 static int 2415 xptedtmatch(struct ccb_dev_match *cdm) 2416 { 2417 int ret; 2418 2419 cdm->num_matches = 0; 2420 2421 /* 2422 * Check the bus list generation. If it has changed, the user 2423 * needs to reset everything and start over. 2424 */ 2425 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2426 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2427 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 2428 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2429 return(0); 2430 } 2431 2432 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2433 && (cdm->pos.cookie.bus != NULL)) 2434 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2435 xptedtbusfunc, cdm); 2436 else 2437 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2438 2439 /* 2440 * If we get back 0, that means that we had to stop before fully 2441 * traversing the EDT. It also means that one of the subroutines 2442 * has set the status field to the proper value. If we get back 1, 2443 * we've fully traversed the EDT and copied out any matching entries. 2444 */ 2445 if (ret == 1) 2446 cdm->status = CAM_DEV_MATCH_LAST; 2447 2448 return(ret); 2449 } 2450 2451 static int 2452 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2453 { 2454 struct ccb_dev_match *cdm; 2455 2456 cdm = (struct ccb_dev_match *)arg; 2457 2458 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2459 && (cdm->pos.cookie.pdrv == pdrv) 2460 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2461 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2462 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2463 (*pdrv)->generation)) { 2464 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2465 return(0); 2466 } 2467 2468 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2469 && (cdm->pos.cookie.pdrv == pdrv) 2470 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2471 && (cdm->pos.cookie.periph != NULL)) 2472 return(xptpdperiphtraverse(pdrv, 2473 (struct cam_periph *)cdm->pos.cookie.periph, 2474 xptplistperiphfunc, arg)); 2475 else 2476 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2477 } 2478 2479 static int 2480 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2481 { 2482 struct ccb_dev_match *cdm; 2483 dev_match_ret retval; 2484 2485 cdm = (struct ccb_dev_match *)arg; 2486 2487 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2488 2489 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2490 cdm->status = CAM_DEV_MATCH_ERROR; 2491 return(0); 2492 } 2493 2494 /* 2495 * If the copy flag is set, copy this peripheral out. 2496 */ 2497 if (retval & DM_RET_COPY) { 2498 int spaceleft, j; 2499 2500 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2501 sizeof(struct dev_match_result)); 2502 2503 /* 2504 * If we don't have enough space to put in another 2505 * match result, save our position and tell the 2506 * user there are more devices to check. 2507 */ 2508 if (spaceleft < sizeof(struct dev_match_result)) { 2509 struct periph_driver **pdrv; 2510 2511 pdrv = NULL; 2512 bzero(&cdm->pos, sizeof(cdm->pos)); 2513 cdm->pos.position_type = 2514 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2515 CAM_DEV_POS_PERIPH; 2516 2517 /* 2518 * This may look a bit non-sensical, but it is 2519 * actually quite logical. There are very few 2520 * peripheral drivers, and bloating every peripheral 2521 * structure with a pointer back to its parent 2522 * peripheral driver linker set entry would cost 2523 * more in the long run than doing this quick lookup. 2524 */ 2525 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2526 if (strcmp((*pdrv)->driver_name, 2527 periph->periph_name) == 0) 2528 break; 2529 } 2530 2531 if (*pdrv == NULL) { 2532 cdm->status = CAM_DEV_MATCH_ERROR; 2533 return(0); 2534 } 2535 2536 cdm->pos.cookie.pdrv = pdrv; 2537 /* 2538 * The periph generation slot does double duty, as 2539 * does the periph pointer slot. They are used for 2540 * both edt and pdrv lookups and positioning. 2541 */ 2542 cdm->pos.cookie.periph = periph; 2543 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2544 (*pdrv)->generation; 2545 cdm->status = CAM_DEV_MATCH_MORE; 2546 return(0); 2547 } 2548 2549 j = cdm->num_matches; 2550 cdm->num_matches++; 2551 cdm->matches[j].type = DEV_MATCH_PERIPH; 2552 cdm->matches[j].result.periph_result.path_id = 2553 periph->path->bus->path_id; 2554 2555 /* 2556 * The transport layer peripheral doesn't have a target or 2557 * lun. 2558 */ 2559 if (periph->path->target) 2560 cdm->matches[j].result.periph_result.target_id = 2561 periph->path->target->target_id; 2562 else 2563 cdm->matches[j].result.periph_result.target_id = -1; 2564 2565 if (periph->path->device) 2566 cdm->matches[j].result.periph_result.target_lun = 2567 periph->path->device->lun_id; 2568 else 2569 cdm->matches[j].result.periph_result.target_lun = -1; 2570 2571 cdm->matches[j].result.periph_result.unit_number = 2572 periph->unit_number; 2573 strncpy(cdm->matches[j].result.periph_result.periph_name, 2574 periph->periph_name, DEV_IDLEN); 2575 } 2576 2577 return(1); 2578 } 2579 2580 static int 2581 xptperiphlistmatch(struct ccb_dev_match *cdm) 2582 { 2583 int ret; 2584 2585 cdm->num_matches = 0; 2586 2587 /* 2588 * At this point in the edt traversal function, we check the bus 2589 * list generation to make sure that no busses have been added or 2590 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2591 * For the peripheral driver list traversal function, however, we 2592 * don't have to worry about new peripheral driver types coming or 2593 * going; they're in a linker set, and therefore can't change 2594 * without a recompile. 2595 */ 2596 2597 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2598 && (cdm->pos.cookie.pdrv != NULL)) 2599 ret = xptpdrvtraverse( 2600 (struct periph_driver **)cdm->pos.cookie.pdrv, 2601 xptplistpdrvfunc, cdm); 2602 else 2603 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2604 2605 /* 2606 * If we get back 0, that means that we had to stop before fully 2607 * traversing the peripheral driver tree. It also means that one of 2608 * the subroutines has set the status field to the proper value. If 2609 * we get back 1, we've fully traversed the EDT and copied out any 2610 * matching entries. 2611 */ 2612 if (ret == 1) 2613 cdm->status = CAM_DEV_MATCH_LAST; 2614 2615 return(ret); 2616 } 2617 2618 static int 2619 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2620 { 2621 struct cam_eb *bus, *next_bus; 2622 int retval; 2623 2624 retval = 1; 2625 2626 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2627 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 2628 bus != NULL; 2629 bus = next_bus) { 2630 next_bus = TAILQ_NEXT(bus, links); 2631 2632 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2633 CAM_SIM_LOCK(bus->sim); 2634 retval = tr_func(bus, arg); 2635 CAM_SIM_UNLOCK(bus->sim); 2636 if (retval == 0) 2637 return(retval); 2638 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2639 } 2640 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2641 2642 return(retval); 2643 } 2644 2645 static int 2646 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2647 xpt_targetfunc_t *tr_func, void *arg) 2648 { 2649 struct cam_et *target, *next_target; 2650 int retval; 2651 2652 retval = 1; 2653 for (target = (start_target ? start_target : 2654 TAILQ_FIRST(&bus->et_entries)); 2655 target != NULL; target = next_target) { 2656 2657 next_target = TAILQ_NEXT(target, links); 2658 2659 retval = tr_func(target, arg); 2660 2661 if (retval == 0) 2662 return(retval); 2663 } 2664 2665 return(retval); 2666 } 2667 2668 static int 2669 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2670 xpt_devicefunc_t *tr_func, void *arg) 2671 { 2672 struct cam_ed *device, *next_device; 2673 int retval; 2674 2675 retval = 1; 2676 for (device = (start_device ? start_device : 2677 TAILQ_FIRST(&target->ed_entries)); 2678 device != NULL; 2679 device = next_device) { 2680 2681 next_device = TAILQ_NEXT(device, links); 2682 2683 retval = tr_func(device, arg); 2684 2685 if (retval == 0) 2686 return(retval); 2687 } 2688 2689 return(retval); 2690 } 2691 2692 static int 2693 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2694 xpt_periphfunc_t *tr_func, void *arg) 2695 { 2696 struct cam_periph *periph, *next_periph; 2697 int retval; 2698 2699 retval = 1; 2700 2701 for (periph = (start_periph ? start_periph : 2702 SLIST_FIRST(&device->periphs)); 2703 periph != NULL; 2704 periph = next_periph) { 2705 2706 next_periph = SLIST_NEXT(periph, periph_links); 2707 2708 retval = tr_func(periph, arg); 2709 if (retval == 0) 2710 return(retval); 2711 } 2712 2713 return(retval); 2714 } 2715 2716 static int 2717 xptpdrvtraverse(struct periph_driver **start_pdrv, 2718 xpt_pdrvfunc_t *tr_func, void *arg) 2719 { 2720 struct periph_driver **pdrv; 2721 int retval; 2722 2723 retval = 1; 2724 2725 /* 2726 * We don't traverse the peripheral driver list like we do the 2727 * other lists, because it is a linker set, and therefore cannot be 2728 * changed during runtime. If the peripheral driver list is ever 2729 * re-done to be something other than a linker set (i.e. it can 2730 * change while the system is running), the list traversal should 2731 * be modified to work like the other traversal functions. 2732 */ 2733 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2734 *pdrv != NULL; pdrv++) { 2735 retval = tr_func(pdrv, arg); 2736 2737 if (retval == 0) 2738 return(retval); 2739 } 2740 2741 return(retval); 2742 } 2743 2744 static int 2745 xptpdperiphtraverse(struct periph_driver **pdrv, 2746 struct cam_periph *start_periph, 2747 xpt_periphfunc_t *tr_func, void *arg) 2748 { 2749 struct cam_periph *periph, *next_periph; 2750 int retval; 2751 2752 retval = 1; 2753 2754 for (periph = (start_periph ? start_periph : 2755 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2756 periph = next_periph) { 2757 2758 next_periph = TAILQ_NEXT(periph, unit_links); 2759 2760 retval = tr_func(periph, arg); 2761 if (retval == 0) 2762 return(retval); 2763 } 2764 return(retval); 2765 } 2766 2767 static int 2768 xptdefbusfunc(struct cam_eb *bus, void *arg) 2769 { 2770 struct xpt_traverse_config *tr_config; 2771 2772 tr_config = (struct xpt_traverse_config *)arg; 2773 2774 if (tr_config->depth == XPT_DEPTH_BUS) { 2775 xpt_busfunc_t *tr_func; 2776 2777 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2778 2779 return(tr_func(bus, tr_config->tr_arg)); 2780 } else 2781 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2782 } 2783 2784 static int 2785 xptdeftargetfunc(struct cam_et *target, void *arg) 2786 { 2787 struct xpt_traverse_config *tr_config; 2788 2789 tr_config = (struct xpt_traverse_config *)arg; 2790 2791 if (tr_config->depth == XPT_DEPTH_TARGET) { 2792 xpt_targetfunc_t *tr_func; 2793 2794 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2795 2796 return(tr_func(target, tr_config->tr_arg)); 2797 } else 2798 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2799 } 2800 2801 static int 2802 xptdefdevicefunc(struct cam_ed *device, void *arg) 2803 { 2804 struct xpt_traverse_config *tr_config; 2805 2806 tr_config = (struct xpt_traverse_config *)arg; 2807 2808 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2809 xpt_devicefunc_t *tr_func; 2810 2811 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2812 2813 return(tr_func(device, tr_config->tr_arg)); 2814 } else 2815 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2816 } 2817 2818 static int 2819 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2820 { 2821 struct xpt_traverse_config *tr_config; 2822 xpt_periphfunc_t *tr_func; 2823 2824 tr_config = (struct xpt_traverse_config *)arg; 2825 2826 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2827 2828 /* 2829 * Unlike the other default functions, we don't check for depth 2830 * here. The peripheral driver level is the last level in the EDT, 2831 * so if we're here, we should execute the function in question. 2832 */ 2833 return(tr_func(periph, tr_config->tr_arg)); 2834 } 2835 2836 /* 2837 * Execute the given function for every bus in the EDT. 2838 */ 2839 static int 2840 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2841 { 2842 struct xpt_traverse_config tr_config; 2843 2844 tr_config.depth = XPT_DEPTH_BUS; 2845 tr_config.tr_func = tr_func; 2846 tr_config.tr_arg = arg; 2847 2848 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2849 } 2850 2851 /* 2852 * Execute the given function for every device in the EDT. 2853 */ 2854 static int 2855 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2856 { 2857 struct xpt_traverse_config tr_config; 2858 2859 tr_config.depth = XPT_DEPTH_DEVICE; 2860 tr_config.tr_func = tr_func; 2861 tr_config.tr_arg = arg; 2862 2863 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2864 } 2865 2866 static int 2867 xptsetasyncfunc(struct cam_ed *device, void *arg) 2868 { 2869 struct cam_path path; 2870 struct ccb_getdev cgd; 2871 struct async_node *cur_entry; 2872 2873 cur_entry = (struct async_node *)arg; 2874 2875 /* 2876 * Don't report unconfigured devices (Wildcard devs, 2877 * devices only for target mode, device instances 2878 * that have been invalidated but are waiting for 2879 * their last reference count to be released). 2880 */ 2881 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2882 return (1); 2883 2884 xpt_compile_path(&path, 2885 NULL, 2886 device->target->bus->path_id, 2887 device->target->target_id, 2888 device->lun_id); 2889 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2890 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2891 xpt_action((union ccb *)&cgd); 2892 cur_entry->callback(cur_entry->callback_arg, 2893 AC_FOUND_DEVICE, 2894 &path, &cgd); 2895 xpt_release_path(&path); 2896 2897 return(1); 2898 } 2899 2900 static int 2901 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2902 { 2903 struct cam_path path; 2904 struct ccb_pathinq cpi; 2905 struct async_node *cur_entry; 2906 2907 cur_entry = (struct async_node *)arg; 2908 2909 xpt_compile_path(&path, /*periph*/NULL, 2910 bus->sim->path_id, 2911 CAM_TARGET_WILDCARD, 2912 CAM_LUN_WILDCARD); 2913 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2914 cpi.ccb_h.func_code = XPT_PATH_INQ; 2915 xpt_action((union ccb *)&cpi); 2916 cur_entry->callback(cur_entry->callback_arg, 2917 AC_PATH_REGISTERED, 2918 &path, &cpi); 2919 xpt_release_path(&path); 2920 2921 return(1); 2922 } 2923 2924 static void 2925 xpt_action_sasync_cb(void *context, int pending) 2926 { 2927 struct async_node *cur_entry; 2928 struct xpt_task *task; 2929 uint32_t added; 2930 2931 task = (struct xpt_task *)context; 2932 cur_entry = (struct async_node *)task->data1; 2933 added = task->data2; 2934 2935 if ((added & AC_FOUND_DEVICE) != 0) { 2936 /* 2937 * Get this peripheral up to date with all 2938 * the currently existing devices. 2939 */ 2940 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 2941 } 2942 if ((added & AC_PATH_REGISTERED) != 0) { 2943 /* 2944 * Get this peripheral up to date with all 2945 * the currently existing busses. 2946 */ 2947 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 2948 } 2949 kfree(task, M_CAMXPT); 2950 } 2951 2952 void 2953 xpt_action(union ccb *start_ccb) 2954 { 2955 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2956 2957 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2958 2959 switch (start_ccb->ccb_h.func_code) { 2960 case XPT_SCSI_IO: 2961 case XPT_TRIM: 2962 { 2963 struct cam_ed *device; 2964 #ifdef CAMDEBUG 2965 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2966 struct cam_path *path; 2967 2968 path = start_ccb->ccb_h.path; 2969 #endif 2970 2971 /* 2972 * For the sake of compatibility with SCSI-1 2973 * devices that may not understand the identify 2974 * message, we include lun information in the 2975 * second byte of all commands. SCSI-1 specifies 2976 * that luns are a 3 bit value and reserves only 3 2977 * bits for lun information in the CDB. Later 2978 * revisions of the SCSI spec allow for more than 8 2979 * luns, but have deprecated lun information in the 2980 * CDB. So, if the lun won't fit, we must omit. 2981 * 2982 * Also be aware that during initial probing for devices, 2983 * the inquiry information is unknown but initialized to 0. 2984 * This means that this code will be exercised while probing 2985 * devices with an ANSI revision greater than 2. 2986 */ 2987 device = start_ccb->ccb_h.path->device; 2988 if (device->protocol_version <= SCSI_REV_2 2989 && start_ccb->ccb_h.target_lun < 8 2990 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2991 2992 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2993 start_ccb->ccb_h.target_lun << 5; 2994 } 2995 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2996 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2997 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2998 &path->device->inq_data), 2999 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 3000 cdb_str, sizeof(cdb_str)))); 3001 /* FALLTHROUGH */ 3002 } 3003 case XPT_TARGET_IO: 3004 case XPT_CONT_TARGET_IO: 3005 start_ccb->csio.sense_resid = 0; 3006 start_ccb->csio.resid = 0; 3007 /* FALLTHROUGH */ 3008 case XPT_RESET_DEV: 3009 case XPT_ENG_EXEC: 3010 { 3011 struct cam_path *path; 3012 struct cam_sim *sim; 3013 int runq; 3014 3015 path = start_ccb->ccb_h.path; 3016 3017 sim = path->bus->sim; 3018 if (sim == &cam_dead_sim) { 3019 /* The SIM has gone; just execute the CCB directly. */ 3020 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); 3021 (*(sim->sim_action))(sim, start_ccb); 3022 break; 3023 } 3024 3025 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 3026 if (path->device->qfrozen_cnt == 0) 3027 runq = xpt_schedule_dev_sendq(path->bus, path->device); 3028 else 3029 runq = 0; 3030 if (runq != 0) 3031 xpt_run_dev_sendq(path->bus); 3032 break; 3033 } 3034 case XPT_SET_TRAN_SETTINGS: 3035 { 3036 xpt_set_transfer_settings(&start_ccb->cts, 3037 start_ccb->ccb_h.path->device, 3038 /*async_update*/FALSE); 3039 break; 3040 } 3041 case XPT_CALC_GEOMETRY: 3042 { 3043 struct cam_sim *sim; 3044 3045 /* Filter out garbage */ 3046 if (start_ccb->ccg.block_size == 0 3047 || start_ccb->ccg.volume_size == 0) { 3048 start_ccb->ccg.cylinders = 0; 3049 start_ccb->ccg.heads = 0; 3050 start_ccb->ccg.secs_per_track = 0; 3051 start_ccb->ccb_h.status = CAM_REQ_CMP; 3052 break; 3053 } 3054 sim = start_ccb->ccb_h.path->bus->sim; 3055 (*(sim->sim_action))(sim, start_ccb); 3056 break; 3057 } 3058 case XPT_ABORT: 3059 { 3060 union ccb* abort_ccb; 3061 3062 abort_ccb = start_ccb->cab.abort_ccb; 3063 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 3064 3065 if (abort_ccb->ccb_h.pinfo.index >= 0) { 3066 struct cam_ccbq *ccbq; 3067 3068 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3069 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3070 abort_ccb->ccb_h.status = 3071 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3072 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3073 xpt_done(abort_ccb); 3074 start_ccb->ccb_h.status = CAM_REQ_CMP; 3075 break; 3076 } 3077 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3078 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3079 /* 3080 * We've caught this ccb en route to 3081 * the SIM. Flag it for abort and the 3082 * SIM will do so just before starting 3083 * real work on the CCB. 3084 */ 3085 abort_ccb->ccb_h.status = 3086 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3087 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3088 start_ccb->ccb_h.status = CAM_REQ_CMP; 3089 break; 3090 } 3091 } 3092 if (XPT_FC_IS_QUEUED(abort_ccb) 3093 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3094 /* 3095 * It's already completed but waiting 3096 * for our SWI to get to it. 3097 */ 3098 start_ccb->ccb_h.status = CAM_UA_ABORT; 3099 break; 3100 } 3101 /* 3102 * If we weren't able to take care of the abort request 3103 * in the XPT, pass the request down to the SIM for processing. 3104 */ 3105 /* FALLTHROUGH */ 3106 } 3107 case XPT_ACCEPT_TARGET_IO: 3108 case XPT_EN_LUN: 3109 case XPT_IMMED_NOTIFY: 3110 case XPT_NOTIFY_ACK: 3111 case XPT_GET_TRAN_SETTINGS: 3112 case XPT_RESET_BUS: 3113 { 3114 struct cam_sim *sim; 3115 3116 sim = start_ccb->ccb_h.path->bus->sim; 3117 (*(sim->sim_action))(sim, start_ccb); 3118 break; 3119 } 3120 case XPT_PATH_INQ: 3121 { 3122 struct cam_sim *sim; 3123 3124 sim = start_ccb->ccb_h.path->bus->sim; 3125 (*(sim->sim_action))(sim, start_ccb); 3126 break; 3127 } 3128 case XPT_PATH_STATS: 3129 start_ccb->cpis.last_reset = 3130 start_ccb->ccb_h.path->bus->last_reset; 3131 start_ccb->ccb_h.status = CAM_REQ_CMP; 3132 break; 3133 case XPT_GDEV_TYPE: 3134 { 3135 struct cam_ed *dev; 3136 3137 dev = start_ccb->ccb_h.path->device; 3138 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3139 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3140 } else { 3141 struct ccb_getdev *cgd; 3142 3143 cgd = &start_ccb->cgd; 3144 cgd->inq_data = dev->inq_data; 3145 cgd->ccb_h.status = CAM_REQ_CMP; 3146 cgd->serial_num_len = dev->serial_num_len; 3147 if ((dev->serial_num_len > 0) 3148 && (dev->serial_num != NULL)) 3149 bcopy(dev->serial_num, cgd->serial_num, 3150 dev->serial_num_len); 3151 } 3152 break; 3153 } 3154 case XPT_GDEV_STATS: 3155 { 3156 struct cam_ed *dev; 3157 3158 dev = start_ccb->ccb_h.path->device; 3159 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3160 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3161 } else { 3162 struct ccb_getdevstats *cgds; 3163 struct cam_eb *bus; 3164 struct cam_et *tar; 3165 3166 cgds = &start_ccb->cgds; 3167 bus = cgds->ccb_h.path->bus; 3168 tar = cgds->ccb_h.path->target; 3169 cgds->dev_openings = dev->ccbq.dev_openings; 3170 cgds->dev_active = dev->ccbq.dev_active; 3171 cgds->devq_openings = dev->ccbq.devq_openings; 3172 cgds->devq_queued = dev->ccbq.queue.entries; 3173 cgds->held = dev->ccbq.held; 3174 cgds->last_reset = tar->last_reset; 3175 cgds->maxtags = dev->quirk->maxtags; 3176 cgds->mintags = dev->quirk->mintags; 3177 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3178 cgds->last_reset = bus->last_reset; 3179 cgds->ccb_h.status = CAM_REQ_CMP; 3180 } 3181 break; 3182 } 3183 case XPT_GDEVLIST: 3184 { 3185 struct cam_periph *nperiph; 3186 struct periph_list *periph_head; 3187 struct ccb_getdevlist *cgdl; 3188 u_int i; 3189 struct cam_ed *device; 3190 int found; 3191 3192 3193 found = 0; 3194 3195 /* 3196 * Don't want anyone mucking with our data. 3197 */ 3198 device = start_ccb->ccb_h.path->device; 3199 periph_head = &device->periphs; 3200 cgdl = &start_ccb->cgdl; 3201 3202 /* 3203 * Check and see if the list has changed since the user 3204 * last requested a list member. If so, tell them that the 3205 * list has changed, and therefore they need to start over 3206 * from the beginning. 3207 */ 3208 if ((cgdl->index != 0) && 3209 (cgdl->generation != device->generation)) { 3210 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3211 break; 3212 } 3213 3214 /* 3215 * Traverse the list of peripherals and attempt to find 3216 * the requested peripheral. 3217 */ 3218 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3219 (nperiph != NULL) && (i <= cgdl->index); 3220 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3221 if (i == cgdl->index) { 3222 strncpy(cgdl->periph_name, 3223 nperiph->periph_name, 3224 DEV_IDLEN); 3225 cgdl->unit_number = nperiph->unit_number; 3226 found = 1; 3227 } 3228 } 3229 if (found == 0) { 3230 cgdl->status = CAM_GDEVLIST_ERROR; 3231 break; 3232 } 3233 3234 if (nperiph == NULL) 3235 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3236 else 3237 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3238 3239 cgdl->index++; 3240 cgdl->generation = device->generation; 3241 3242 cgdl->ccb_h.status = CAM_REQ_CMP; 3243 break; 3244 } 3245 case XPT_DEV_MATCH: 3246 { 3247 dev_pos_type position_type; 3248 struct ccb_dev_match *cdm; 3249 int ret; 3250 3251 cdm = &start_ccb->cdm; 3252 3253 /* 3254 * There are two ways of getting at information in the EDT. 3255 * The first way is via the primary EDT tree. It starts 3256 * with a list of busses, then a list of targets on a bus, 3257 * then devices/luns on a target, and then peripherals on a 3258 * device/lun. The "other" way is by the peripheral driver 3259 * lists. The peripheral driver lists are organized by 3260 * peripheral driver. (obviously) So it makes sense to 3261 * use the peripheral driver list if the user is looking 3262 * for something like "da1", or all "da" devices. If the 3263 * user is looking for something on a particular bus/target 3264 * or lun, it's generally better to go through the EDT tree. 3265 */ 3266 3267 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3268 position_type = cdm->pos.position_type; 3269 else { 3270 u_int i; 3271 3272 position_type = CAM_DEV_POS_NONE; 3273 3274 for (i = 0; i < cdm->num_patterns; i++) { 3275 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3276 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3277 position_type = CAM_DEV_POS_EDT; 3278 break; 3279 } 3280 } 3281 3282 if (cdm->num_patterns == 0) 3283 position_type = CAM_DEV_POS_EDT; 3284 else if (position_type == CAM_DEV_POS_NONE) 3285 position_type = CAM_DEV_POS_PDRV; 3286 } 3287 3288 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3289 case CAM_DEV_POS_EDT: 3290 ret = xptedtmatch(cdm); 3291 break; 3292 case CAM_DEV_POS_PDRV: 3293 ret = xptperiphlistmatch(cdm); 3294 break; 3295 default: 3296 cdm->status = CAM_DEV_MATCH_ERROR; 3297 break; 3298 } 3299 3300 if (cdm->status == CAM_DEV_MATCH_ERROR) 3301 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3302 else 3303 start_ccb->ccb_h.status = CAM_REQ_CMP; 3304 3305 break; 3306 } 3307 case XPT_SASYNC_CB: 3308 { 3309 struct ccb_setasync *csa; 3310 struct async_node *cur_entry; 3311 struct async_list *async_head; 3312 u_int32_t added; 3313 3314 csa = &start_ccb->csa; 3315 added = csa->event_enable; 3316 async_head = &csa->ccb_h.path->device->asyncs; 3317 3318 /* 3319 * If there is already an entry for us, simply 3320 * update it. 3321 */ 3322 cur_entry = SLIST_FIRST(async_head); 3323 while (cur_entry != NULL) { 3324 if ((cur_entry->callback_arg == csa->callback_arg) 3325 && (cur_entry->callback == csa->callback)) 3326 break; 3327 cur_entry = SLIST_NEXT(cur_entry, links); 3328 } 3329 3330 if (cur_entry != NULL) { 3331 /* 3332 * If the request has no flags set, 3333 * remove the entry. 3334 */ 3335 added &= ~cur_entry->event_enable; 3336 if (csa->event_enable == 0) { 3337 SLIST_REMOVE(async_head, cur_entry, 3338 async_node, links); 3339 atomic_add_int( 3340 &csa->ccb_h.path->device->refcount, -1); 3341 kfree(cur_entry, M_CAMXPT); 3342 } else { 3343 cur_entry->event_enable = csa->event_enable; 3344 } 3345 } else { 3346 cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, 3347 M_INTWAIT); 3348 cur_entry->event_enable = csa->event_enable; 3349 cur_entry->callback_arg = csa->callback_arg; 3350 cur_entry->callback = csa->callback; 3351 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3352 atomic_add_int(&csa->ccb_h.path->device->refcount, 1); 3353 } 3354 3355 /* 3356 * Need to decouple this operation via a taskqueue so that 3357 * the locking doesn't become a mess. 3358 */ 3359 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 3360 struct xpt_task *task; 3361 3362 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 3363 M_INTWAIT); 3364 3365 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 3366 task->data1 = cur_entry; 3367 task->data2 = added; 3368 taskqueue_enqueue(taskqueue_thread[mycpuid], 3369 &task->task); 3370 } 3371 3372 start_ccb->ccb_h.status = CAM_REQ_CMP; 3373 break; 3374 } 3375 case XPT_REL_SIMQ: 3376 { 3377 struct ccb_relsim *crs; 3378 struct cam_ed *dev; 3379 3380 crs = &start_ccb->crs; 3381 dev = crs->ccb_h.path->device; 3382 if (dev == NULL) { 3383 3384 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3385 break; 3386 } 3387 3388 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3389 3390 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 3391 /* Don't ever go below one opening */ 3392 if (crs->openings > 0) { 3393 xpt_dev_ccbq_resize(crs->ccb_h.path, 3394 crs->openings); 3395 3396 if (bootverbose) { 3397 xpt_print(crs->ccb_h.path, 3398 "tagged openings now %d\n", 3399 crs->openings); 3400 } 3401 } 3402 } 3403 } 3404 3405 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3406 3407 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3408 3409 /* 3410 * Just extend the old timeout and decrement 3411 * the freeze count so that a single timeout 3412 * is sufficient for releasing the queue. 3413 */ 3414 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3415 callout_stop(&dev->callout); 3416 } else { 3417 3418 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3419 } 3420 3421 callout_reset(&dev->callout, 3422 (crs->release_timeout * hz) / 1000, 3423 xpt_release_devq_timeout, dev); 3424 3425 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3426 3427 } 3428 3429 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3430 3431 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3432 /* 3433 * Decrement the freeze count so that a single 3434 * completion is still sufficient to unfreeze 3435 * the queue. 3436 */ 3437 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3438 } else { 3439 3440 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3441 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3442 } 3443 } 3444 3445 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3446 3447 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3448 || (dev->ccbq.dev_active == 0)) { 3449 3450 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3451 } else { 3452 3453 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3454 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3455 } 3456 } 3457 3458 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3459 3460 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3461 /*run_queue*/TRUE); 3462 } 3463 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3464 start_ccb->ccb_h.status = CAM_REQ_CMP; 3465 break; 3466 } 3467 case XPT_SCAN_BUS: 3468 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3469 break; 3470 case XPT_SCAN_LUN: 3471 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3472 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3473 start_ccb); 3474 break; 3475 case XPT_DEBUG: { 3476 #ifdef CAMDEBUG 3477 #ifdef CAM_DEBUG_DELAY 3478 cam_debug_delay = CAM_DEBUG_DELAY; 3479 #endif 3480 cam_dflags = start_ccb->cdbg.flags; 3481 if (cam_dpath != NULL) { 3482 xpt_free_path(cam_dpath); 3483 cam_dpath = NULL; 3484 } 3485 3486 if (cam_dflags != CAM_DEBUG_NONE) { 3487 if (xpt_create_path(&cam_dpath, xpt_periph, 3488 start_ccb->ccb_h.path_id, 3489 start_ccb->ccb_h.target_id, 3490 start_ccb->ccb_h.target_lun) != 3491 CAM_REQ_CMP) { 3492 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3493 cam_dflags = CAM_DEBUG_NONE; 3494 } else { 3495 start_ccb->ccb_h.status = CAM_REQ_CMP; 3496 xpt_print(cam_dpath, "debugging flags now %x\n", 3497 cam_dflags); 3498 } 3499 } else { 3500 cam_dpath = NULL; 3501 start_ccb->ccb_h.status = CAM_REQ_CMP; 3502 } 3503 #else /* !CAMDEBUG */ 3504 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3505 #endif /* CAMDEBUG */ 3506 break; 3507 } 3508 case XPT_NOOP: 3509 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3510 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3511 start_ccb->ccb_h.status = CAM_REQ_CMP; 3512 break; 3513 default: 3514 case XPT_SDEV_TYPE: 3515 case XPT_TERM_IO: 3516 case XPT_ENG_INQ: 3517 /* XXX Implement */ 3518 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3519 break; 3520 } 3521 } 3522 3523 void 3524 xpt_polled_action(union ccb *start_ccb) 3525 { 3526 u_int32_t timeout; 3527 struct cam_sim *sim; 3528 struct cam_devq *devq; 3529 struct cam_ed *dev; 3530 3531 timeout = start_ccb->ccb_h.timeout; 3532 sim = start_ccb->ccb_h.path->bus->sim; 3533 devq = sim->devq; 3534 dev = start_ccb->ccb_h.path->device; 3535 3536 sim_lock_assert_owned(sim->lock); 3537 3538 /* 3539 * Steal an opening so that no other queued requests 3540 * can get it before us while we simulate interrupts. 3541 */ 3542 dev->ccbq.devq_openings--; 3543 dev->ccbq.dev_openings--; 3544 3545 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3546 && (--timeout > 0)) { 3547 DELAY(1000); 3548 (*(sim->sim_poll))(sim); 3549 camisr_runqueue(sim); 3550 } 3551 3552 dev->ccbq.devq_openings++; 3553 dev->ccbq.dev_openings++; 3554 3555 if (timeout != 0) { 3556 xpt_action(start_ccb); 3557 while(--timeout > 0) { 3558 (*(sim->sim_poll))(sim); 3559 camisr_runqueue(sim); 3560 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3561 != CAM_REQ_INPROG) 3562 break; 3563 DELAY(1000); 3564 } 3565 if (timeout == 0) { 3566 /* 3567 * XXX Is it worth adding a sim_timeout entry 3568 * point so we can attempt recovery? If 3569 * this is only used for dumps, I don't think 3570 * it is. 3571 */ 3572 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3573 } 3574 } else { 3575 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3576 } 3577 } 3578 3579 /* 3580 * Schedule a peripheral driver to receive a ccb when it's 3581 * target device has space for more transactions. 3582 */ 3583 void 3584 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3585 { 3586 struct cam_ed *device; 3587 union ccb *work_ccb; 3588 int runq; 3589 3590 sim_lock_assert_owned(perph->sim->lock); 3591 3592 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3593 device = perph->path->device; 3594 if (periph_is_queued(perph)) { 3595 /* Simply reorder based on new priority */ 3596 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3597 (" change priority to %d\n", new_priority)); 3598 if (new_priority < perph->pinfo.priority) { 3599 camq_change_priority(&device->drvq, 3600 perph->pinfo.index, 3601 new_priority); 3602 } 3603 runq = 0; 3604 } else if (perph->path->bus->sim == &cam_dead_sim) { 3605 /* The SIM is gone so just call periph_start directly. */ 3606 work_ccb = xpt_get_ccb(perph->path->device); 3607 if (work_ccb == NULL) 3608 return; /* XXX */ 3609 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); 3610 perph->pinfo.priority = new_priority; 3611 perph->periph_start(perph, work_ccb); 3612 return; 3613 } else { 3614 /* New entry on the queue */ 3615 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3616 (" added periph to queue\n")); 3617 perph->pinfo.priority = new_priority; 3618 perph->pinfo.generation = ++device->drvq.generation; 3619 camq_insert(&device->drvq, &perph->pinfo); 3620 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3621 } 3622 if (runq != 0) { 3623 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3624 (" calling xpt_run_devq\n")); 3625 xpt_run_dev_allocq(perph->path->bus); 3626 } 3627 } 3628 3629 3630 /* 3631 * Schedule a device to run on a given queue. 3632 * If the device was inserted as a new entry on the queue, 3633 * return 1 meaning the device queue should be run. If we 3634 * were already queued, implying someone else has already 3635 * started the queue, return 0 so the caller doesn't attempt 3636 * to run the queue. 3637 */ 3638 static int 3639 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3640 u_int32_t new_priority) 3641 { 3642 int retval; 3643 u_int32_t old_priority; 3644 3645 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3646 3647 old_priority = pinfo->priority; 3648 3649 /* 3650 * Are we already queued? 3651 */ 3652 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3653 /* Simply reorder based on new priority */ 3654 if (new_priority < old_priority) { 3655 camq_change_priority(queue, pinfo->index, 3656 new_priority); 3657 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3658 ("changed priority to %d\n", 3659 new_priority)); 3660 } 3661 retval = 0; 3662 } else { 3663 /* New entry on the queue */ 3664 if (new_priority < old_priority) 3665 pinfo->priority = new_priority; 3666 3667 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3668 ("Inserting onto queue\n")); 3669 pinfo->generation = ++queue->generation; 3670 camq_insert(queue, pinfo); 3671 retval = 1; 3672 } 3673 return (retval); 3674 } 3675 3676 static void 3677 xpt_run_dev_allocq(struct cam_eb *bus) 3678 { 3679 struct cam_devq *devq; 3680 3681 if ((devq = bus->sim->devq) == NULL) { 3682 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3683 return; 3684 } 3685 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3686 3687 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3688 (" qfrozen_cnt == 0x%x, entries == %d, " 3689 "openings == %d, active == %d\n", 3690 devq->alloc_queue.qfrozen_cnt, 3691 devq->alloc_queue.entries, 3692 devq->alloc_openings, 3693 devq->alloc_active)); 3694 3695 devq->alloc_queue.qfrozen_cnt++; 3696 while ((devq->alloc_queue.entries > 0) 3697 && (devq->alloc_openings > 0) 3698 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3699 struct cam_ed_qinfo *qinfo; 3700 struct cam_ed *device; 3701 union ccb *work_ccb; 3702 struct cam_periph *drv; 3703 struct camq *drvq; 3704 3705 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3706 CAMQ_HEAD); 3707 device = qinfo->device; 3708 3709 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3710 ("running device %p\n", device)); 3711 3712 drvq = &device->drvq; 3713 3714 #ifdef CAMDEBUG 3715 if (drvq->entries <= 0) { 3716 panic("xpt_run_dev_allocq: " 3717 "Device on queue without any work to do"); 3718 } 3719 #endif 3720 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3721 devq->alloc_openings--; 3722 devq->alloc_active++; 3723 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3724 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3725 drv->pinfo.priority); 3726 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3727 ("calling periph start\n")); 3728 drv->periph_start(drv, work_ccb); 3729 } else { 3730 /* 3731 * Malloc failure in alloc_ccb 3732 */ 3733 /* 3734 * XXX add us to a list to be run from free_ccb 3735 * if we don't have any ccbs active on this 3736 * device queue otherwise we may never get run 3737 * again. 3738 */ 3739 break; 3740 } 3741 3742 if (drvq->entries > 0) { 3743 /* We have more work. Attempt to reschedule */ 3744 xpt_schedule_dev_allocq(bus, device); 3745 } 3746 } 3747 devq->alloc_queue.qfrozen_cnt--; 3748 } 3749 3750 static void 3751 xpt_run_dev_sendq(struct cam_eb *bus) 3752 { 3753 struct cam_devq *devq; 3754 3755 if ((devq = bus->sim->devq) == NULL) { 3756 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3757 return; 3758 } 3759 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3760 3761 devq->send_queue.qfrozen_cnt++; 3762 while ((devq->send_queue.entries > 0) 3763 && (devq->send_openings > 0)) { 3764 struct cam_ed_qinfo *qinfo; 3765 struct cam_ed *device; 3766 union ccb *work_ccb; 3767 struct cam_sim *sim; 3768 3769 if (devq->send_queue.qfrozen_cnt > 1) { 3770 break; 3771 } 3772 3773 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3774 CAMQ_HEAD); 3775 device = qinfo->device; 3776 3777 /* 3778 * If the device has been "frozen", don't attempt 3779 * to run it. 3780 */ 3781 if (device->qfrozen_cnt > 0) { 3782 continue; 3783 } 3784 3785 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3786 ("running device %p\n", device)); 3787 3788 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3789 if (work_ccb == NULL) { 3790 kprintf("device on run queue with no ccbs???\n"); 3791 continue; 3792 } 3793 3794 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3795 3796 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 3797 if (xsoftc.num_highpower <= 0) { 3798 /* 3799 * We got a high power command, but we 3800 * don't have any available slots. Freeze 3801 * the device queue until we have a slot 3802 * available. 3803 */ 3804 device->qfrozen_cnt++; 3805 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3806 &work_ccb->ccb_h, 3807 xpt_links.stqe); 3808 3809 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3810 continue; 3811 } else { 3812 /* 3813 * Consume a high power slot while 3814 * this ccb runs. 3815 */ 3816 xsoftc.num_highpower--; 3817 } 3818 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3819 } 3820 devq->active_dev = device; 3821 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3822 3823 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3824 3825 devq->send_openings--; 3826 devq->send_active++; 3827 3828 if (device->ccbq.queue.entries > 0) 3829 xpt_schedule_dev_sendq(bus, device); 3830 3831 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3832 /* 3833 * The client wants to freeze the queue 3834 * after this CCB is sent. 3835 */ 3836 device->qfrozen_cnt++; 3837 } 3838 3839 /* In Target mode, the peripheral driver knows best... */ 3840 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3841 if ((device->inq_flags & SID_CmdQue) != 0 3842 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3843 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3844 else 3845 /* 3846 * Clear this in case of a retried CCB that 3847 * failed due to a rejected tag. 3848 */ 3849 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3850 } 3851 3852 /* 3853 * Device queues can be shared among multiple sim instances 3854 * that reside on different busses. Use the SIM in the queue 3855 * CCB's path, rather than the one in the bus that was passed 3856 * into this function. 3857 */ 3858 sim = work_ccb->ccb_h.path->bus->sim; 3859 (*(sim->sim_action))(sim, work_ccb); 3860 3861 devq->active_dev = NULL; 3862 } 3863 devq->send_queue.qfrozen_cnt--; 3864 } 3865 3866 /* 3867 * This function merges stuff from the slave ccb into the master ccb, while 3868 * keeping important fields in the master ccb constant. 3869 */ 3870 void 3871 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3872 { 3873 /* 3874 * Pull fields that are valid for peripheral drivers to set 3875 * into the master CCB along with the CCB "payload". 3876 */ 3877 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3878 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3879 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3880 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3881 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3882 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3883 } 3884 3885 void 3886 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3887 { 3888 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3889 callout_init(&ccb_h->timeout_ch); 3890 ccb_h->pinfo.priority = priority; 3891 ccb_h->path = path; 3892 ccb_h->path_id = path->bus->path_id; 3893 if (path->target) 3894 ccb_h->target_id = path->target->target_id; 3895 else 3896 ccb_h->target_id = CAM_TARGET_WILDCARD; 3897 if (path->device) { 3898 ccb_h->target_lun = path->device->lun_id; 3899 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3900 } else { 3901 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3902 } 3903 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3904 ccb_h->flags = 0; 3905 } 3906 3907 /* Path manipulation functions */ 3908 cam_status 3909 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3910 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3911 { 3912 struct cam_path *path; 3913 cam_status status; 3914 3915 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); 3916 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3917 if (status != CAM_REQ_CMP) { 3918 kfree(path, M_CAMXPT); 3919 path = NULL; 3920 } 3921 *new_path_ptr = path; 3922 return (status); 3923 } 3924 3925 cam_status 3926 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3927 struct cam_periph *periph, path_id_t path_id, 3928 target_id_t target_id, lun_id_t lun_id) 3929 { 3930 struct cam_path *path; 3931 struct cam_eb *bus = NULL; 3932 cam_status status; 3933 int need_unlock = 0; 3934 3935 path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3936 3937 if (path_id != CAM_BUS_WILDCARD) { 3938 bus = xpt_find_bus(path_id); 3939 if (bus != NULL) { 3940 need_unlock = 1; 3941 CAM_SIM_LOCK(bus->sim); 3942 } 3943 } 3944 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3945 if (need_unlock) 3946 CAM_SIM_UNLOCK(bus->sim); 3947 if (status != CAM_REQ_CMP) { 3948 kfree(path, M_CAMXPT); 3949 path = NULL; 3950 } 3951 *new_path_ptr = path; 3952 return (status); 3953 } 3954 3955 static cam_status 3956 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3957 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3958 { 3959 struct cam_eb *bus; 3960 struct cam_et *target; 3961 struct cam_ed *device; 3962 cam_status status; 3963 3964 status = CAM_REQ_CMP; /* Completed without error */ 3965 target = NULL; /* Wildcarded */ 3966 device = NULL; /* Wildcarded */ 3967 3968 /* 3969 * We will potentially modify the EDT, so block interrupts 3970 * that may attempt to create cam paths. 3971 */ 3972 bus = xpt_find_bus(path_id); 3973 if (bus == NULL) { 3974 status = CAM_PATH_INVALID; 3975 } else { 3976 target = xpt_find_target(bus, target_id); 3977 if (target == NULL) { 3978 /* Create one */ 3979 struct cam_et *new_target; 3980 3981 new_target = xpt_alloc_target(bus, target_id); 3982 if (new_target == NULL) { 3983 status = CAM_RESRC_UNAVAIL; 3984 } else { 3985 target = new_target; 3986 } 3987 } 3988 if (target != NULL) { 3989 device = xpt_find_device(target, lun_id); 3990 if (device == NULL) { 3991 /* Create one */ 3992 struct cam_ed *new_device; 3993 3994 new_device = xpt_alloc_device(bus, 3995 target, 3996 lun_id); 3997 if (new_device == NULL) { 3998 status = CAM_RESRC_UNAVAIL; 3999 } else { 4000 device = new_device; 4001 } 4002 } 4003 } 4004 } 4005 4006 /* 4007 * Only touch the user's data if we are successful. 4008 */ 4009 if (status == CAM_REQ_CMP) { 4010 new_path->periph = perph; 4011 new_path->bus = bus; 4012 new_path->target = target; 4013 new_path->device = device; 4014 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 4015 } else { 4016 if (device != NULL) 4017 xpt_release_device(bus, target, device); 4018 if (target != NULL) 4019 xpt_release_target(bus, target); 4020 if (bus != NULL) 4021 xpt_release_bus(bus); 4022 } 4023 return (status); 4024 } 4025 4026 static void 4027 xpt_release_path(struct cam_path *path) 4028 { 4029 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 4030 if (path->device != NULL) { 4031 xpt_release_device(path->bus, path->target, path->device); 4032 path->device = NULL; 4033 } 4034 if (path->target != NULL) { 4035 xpt_release_target(path->bus, path->target); 4036 path->target = NULL; 4037 } 4038 if (path->bus != NULL) { 4039 xpt_release_bus(path->bus); 4040 path->bus = NULL; 4041 } 4042 } 4043 4044 void 4045 xpt_free_path(struct cam_path *path) 4046 { 4047 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 4048 xpt_release_path(path); 4049 kfree(path, M_CAMXPT); 4050 } 4051 4052 4053 /* 4054 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 4055 * in path1, 2 for match with wildcards in path2. 4056 */ 4057 int 4058 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 4059 { 4060 int retval = 0; 4061 4062 if (path1->bus != path2->bus) { 4063 if (path1->bus->path_id == CAM_BUS_WILDCARD) 4064 retval = 1; 4065 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 4066 retval = 2; 4067 else 4068 return (-1); 4069 } 4070 if (path1->target != path2->target) { 4071 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 4072 if (retval == 0) 4073 retval = 1; 4074 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 4075 retval = 2; 4076 else 4077 return (-1); 4078 } 4079 if (path1->device != path2->device) { 4080 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4081 if (retval == 0) 4082 retval = 1; 4083 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4084 retval = 2; 4085 else 4086 return (-1); 4087 } 4088 return (retval); 4089 } 4090 4091 void 4092 xpt_print_path(struct cam_path *path) 4093 { 4094 4095 if (path == NULL) 4096 kprintf("(nopath): "); 4097 else { 4098 if (path->periph != NULL) 4099 kprintf("(%s%d:", path->periph->periph_name, 4100 path->periph->unit_number); 4101 else 4102 kprintf("(noperiph:"); 4103 4104 if (path->bus != NULL) 4105 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4106 path->bus->sim->unit_number, 4107 path->bus->sim->bus_id); 4108 else 4109 kprintf("nobus:"); 4110 4111 if (path->target != NULL) 4112 kprintf("%d:", path->target->target_id); 4113 else 4114 kprintf("X:"); 4115 4116 if (path->device != NULL) 4117 kprintf("%d): ", path->device->lun_id); 4118 else 4119 kprintf("X): "); 4120 } 4121 } 4122 4123 void 4124 xpt_print(struct cam_path *path, const char *fmt, ...) 4125 { 4126 __va_list ap; 4127 xpt_print_path(path); 4128 __va_start(ap, fmt); 4129 kvprintf(fmt, ap); 4130 __va_end(ap); 4131 } 4132 4133 int 4134 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4135 { 4136 struct sbuf sb; 4137 4138 sim_lock_assert_owned(path->bus->sim->lock); 4139 4140 sbuf_new(&sb, str, str_len, 0); 4141 4142 if (path == NULL) 4143 sbuf_printf(&sb, "(nopath): "); 4144 else { 4145 if (path->periph != NULL) 4146 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4147 path->periph->unit_number); 4148 else 4149 sbuf_printf(&sb, "(noperiph:"); 4150 4151 if (path->bus != NULL) 4152 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4153 path->bus->sim->unit_number, 4154 path->bus->sim->bus_id); 4155 else 4156 sbuf_printf(&sb, "nobus:"); 4157 4158 if (path->target != NULL) 4159 sbuf_printf(&sb, "%d:", path->target->target_id); 4160 else 4161 sbuf_printf(&sb, "X:"); 4162 4163 if (path->device != NULL) 4164 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4165 else 4166 sbuf_printf(&sb, "X): "); 4167 } 4168 sbuf_finish(&sb); 4169 4170 return(sbuf_len(&sb)); 4171 } 4172 4173 path_id_t 4174 xpt_path_path_id(struct cam_path *path) 4175 { 4176 sim_lock_assert_owned(path->bus->sim->lock); 4177 4178 return(path->bus->path_id); 4179 } 4180 4181 target_id_t 4182 xpt_path_target_id(struct cam_path *path) 4183 { 4184 sim_lock_assert_owned(path->bus->sim->lock); 4185 4186 if (path->target != NULL) 4187 return (path->target->target_id); 4188 else 4189 return (CAM_TARGET_WILDCARD); 4190 } 4191 4192 lun_id_t 4193 xpt_path_lun_id(struct cam_path *path) 4194 { 4195 sim_lock_assert_owned(path->bus->sim->lock); 4196 4197 if (path->device != NULL) 4198 return (path->device->lun_id); 4199 else 4200 return (CAM_LUN_WILDCARD); 4201 } 4202 4203 struct cam_sim * 4204 xpt_path_sim(struct cam_path *path) 4205 { 4206 return (path->bus->sim); 4207 } 4208 4209 struct cam_periph* 4210 xpt_path_periph(struct cam_path *path) 4211 { 4212 sim_lock_assert_owned(path->bus->sim->lock); 4213 4214 return (path->periph); 4215 } 4216 4217 char * 4218 xpt_path_serialno(struct cam_path *path) 4219 { 4220 return (path->device->serial_num); 4221 } 4222 4223 /* 4224 * Release a CAM control block for the caller. Remit the cost of the structure 4225 * to the device referenced by the path. If the this device had no 'credits' 4226 * and peripheral drivers have registered async callbacks for this notification 4227 * call them now. 4228 */ 4229 void 4230 xpt_release_ccb(union ccb *free_ccb) 4231 { 4232 struct cam_path *path; 4233 struct cam_ed *device; 4234 struct cam_eb *bus; 4235 struct cam_sim *sim; 4236 4237 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4238 path = free_ccb->ccb_h.path; 4239 device = path->device; 4240 bus = path->bus; 4241 sim = bus->sim; 4242 4243 sim_lock_assert_owned(sim->lock); 4244 4245 cam_ccbq_release_opening(&device->ccbq); 4246 if (sim->ccb_count > sim->max_ccbs) { 4247 xpt_free_ccb(free_ccb); 4248 sim->ccb_count--; 4249 } else if (sim == &cam_dead_sim) { 4250 xpt_free_ccb(free_ccb); 4251 } else { 4252 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 4253 xpt_links.sle); 4254 } 4255 if (sim->devq == NULL) { 4256 return; 4257 } 4258 sim->devq->alloc_openings++; 4259 sim->devq->alloc_active--; 4260 /* XXX Turn this into an inline function - xpt_run_device?? */ 4261 if ((device_is_alloc_queued(device) == 0) 4262 && (device->drvq.entries > 0)) { 4263 xpt_schedule_dev_allocq(bus, device); 4264 } 4265 if (dev_allocq_is_runnable(sim->devq)) 4266 xpt_run_dev_allocq(bus); 4267 } 4268 4269 /* Functions accessed by SIM drivers */ 4270 4271 /* 4272 * A sim structure, listing the SIM entry points and instance 4273 * identification info is passed to xpt_bus_register to hook the SIM 4274 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4275 * for this new bus and places it in the array of busses and assigns 4276 * it a path_id. The path_id may be influenced by "hard wiring" 4277 * information specified by the user. Once interrupt services are 4278 * availible, the bus will be probed. 4279 */ 4280 int32_t 4281 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4282 { 4283 struct cam_eb *new_bus; 4284 struct cam_eb *old_bus; 4285 struct ccb_pathinq cpi; 4286 4287 sim_lock_assert_owned(sim->lock); 4288 4289 sim->bus_id = bus; 4290 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); 4291 4292 /* 4293 * Must hold topo lock across xptpathid() through installation of 4294 * new_bus to avoid duplication due to SMP races. 4295 */ 4296 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4297 if (strcmp(sim->sim_name, "xpt") != 0) { 4298 sim->path_id = 4299 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4300 } 4301 4302 TAILQ_INIT(&new_bus->et_entries); 4303 new_bus->path_id = sim->path_id; 4304 new_bus->sim = sim; 4305 atomic_add_int(&sim->refcount, 1); 4306 timevalclear(&new_bus->last_reset); 4307 new_bus->flags = 0; 4308 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4309 new_bus->generation = 0; 4310 new_bus->counted_to_config = 0; 4311 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4312 while (old_bus != NULL && old_bus->path_id < new_bus->path_id) 4313 old_bus = TAILQ_NEXT(old_bus, links); 4314 if (old_bus != NULL) 4315 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4316 else 4317 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4318 xsoftc.bus_generation++; 4319 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4320 4321 /* Notify interested parties */ 4322 if (sim->path_id != CAM_XPT_PATH_ID) { 4323 struct cam_path path; 4324 4325 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4326 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4327 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4328 cpi.ccb_h.func_code = XPT_PATH_INQ; 4329 xpt_action((union ccb *)&cpi); 4330 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4331 xpt_release_path(&path); 4332 } 4333 return (CAM_SUCCESS); 4334 } 4335 4336 /* 4337 * Deregister a bus. We must clean out all transactions pending on the bus. 4338 * This routine is typically called prior to cam_sim_free() (e.g. see 4339 * dev/usbmisc/umass/umass.c) 4340 */ 4341 int32_t 4342 xpt_bus_deregister(path_id_t pathid) 4343 { 4344 struct cam_path bus_path; 4345 struct cam_et *target; 4346 struct cam_ed *device; 4347 struct cam_ed_qinfo *qinfo; 4348 struct cam_devq *devq; 4349 struct cam_periph *periph; 4350 struct cam_sim *ccbsim; 4351 union ccb *work_ccb; 4352 cam_status status; 4353 int retries = 0; 4354 4355 status = xpt_compile_path(&bus_path, NULL, pathid, 4356 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4357 if (status != CAM_REQ_CMP) 4358 return (status); 4359 4360 /* 4361 * This should clear out all pending requests and timeouts, but 4362 * the ccb's may be queued to a software interrupt. 4363 * 4364 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4365 * and it really ought to. 4366 */ 4367 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4368 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4369 4370 /* 4371 * Mark the SIM as having been deregistered. This prevents 4372 * certain operations from re-queueing to it, stops new devices 4373 * from being added, etc. 4374 */ 4375 devq = bus_path.bus->sim->devq; 4376 ccbsim = bus_path.bus->sim; 4377 ccbsim->flags |= CAM_SIM_DEREGISTERED; 4378 4379 again: 4380 /* 4381 * Execute any pending operations now. 4382 */ 4383 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 4384 CAMQ_HEAD)) != NULL || 4385 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 4386 CAMQ_HEAD)) != NULL) { 4387 do { 4388 device = qinfo->device; 4389 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 4390 if (work_ccb != NULL) { 4391 devq->active_dev = device; 4392 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 4393 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 4394 (*(ccbsim->sim_action))(ccbsim, work_ccb); 4395 } 4396 4397 periph = (struct cam_periph *)camq_remove(&device->drvq, 4398 CAMQ_HEAD); 4399 if (periph != NULL) 4400 xpt_schedule(periph, periph->pinfo.priority); 4401 } while (work_ccb != NULL || periph != NULL); 4402 } 4403 4404 /* 4405 * Make sure all completed CCBs are processed. 4406 */ 4407 while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { 4408 camisr_runqueue(ccbsim); 4409 } 4410 4411 /* 4412 * Check for requeues, reissues asyncs if necessary 4413 */ 4414 if (CAMQ_GET_HEAD(&devq->send_queue)) 4415 kprintf("camq: devq send_queue still in use (%d entries)\n", 4416 devq->send_queue.entries); 4417 if (CAMQ_GET_HEAD(&devq->alloc_queue)) 4418 kprintf("camq: devq alloc_queue still in use (%d entries)\n", 4419 devq->alloc_queue.entries); 4420 if (CAMQ_GET_HEAD(&devq->send_queue) || 4421 CAMQ_GET_HEAD(&devq->alloc_queue)) { 4422 if (++retries < 5) { 4423 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4424 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4425 goto again; 4426 } 4427 } 4428 4429 /* 4430 * Retarget the bus and all cached sim pointers to dead_sim. 4431 * 4432 * Various CAM subsystems may be holding on to targets, devices, 4433 * and/or peripherals and may attempt to use the sim pointer cached 4434 * in some of these structures during close. 4435 */ 4436 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4437 bus_path.bus->sim = &cam_dead_sim; 4438 TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { 4439 TAILQ_FOREACH(device, &target->ed_entries, links) { 4440 device->sim = &cam_dead_sim; 4441 SLIST_FOREACH(periph, &device->periphs, periph_links) { 4442 periph->sim = &cam_dead_sim; 4443 } 4444 } 4445 } 4446 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4447 4448 /* 4449 * Repeat the async's for the benefit of any new devices, such as 4450 * might be created from completed probes. Any new device 4451 * ops will run on dead_sim. 4452 * 4453 * XXX There are probably races :-( 4454 */ 4455 CAM_SIM_LOCK(&cam_dead_sim); 4456 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4457 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4458 CAM_SIM_UNLOCK(&cam_dead_sim); 4459 4460 /* Release the reference count held while registered. */ 4461 xpt_release_bus(bus_path.bus); 4462 xpt_release_path(&bus_path); 4463 4464 /* Release the ref we got when the bus was registered */ 4465 cam_sim_release(ccbsim, 0); 4466 4467 return (CAM_REQ_CMP); 4468 } 4469 4470 /* 4471 * Must be called with xpt_topo_lock held. 4472 */ 4473 static path_id_t 4474 xptnextfreepathid(void) 4475 { 4476 struct cam_eb *bus; 4477 path_id_t pathid; 4478 const char *strval; 4479 4480 pathid = 0; 4481 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4482 retry: 4483 /* Find an unoccupied pathid */ 4484 while (bus != NULL && bus->path_id <= pathid) { 4485 if (bus->path_id == pathid) 4486 pathid++; 4487 bus = TAILQ_NEXT(bus, links); 4488 } 4489 4490 /* 4491 * Ensure that this pathid is not reserved for 4492 * a bus that may be registered in the future. 4493 */ 4494 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4495 ++pathid; 4496 /* Start the search over */ 4497 goto retry; 4498 } 4499 return (pathid); 4500 } 4501 4502 /* 4503 * Must be called with xpt_topo_lock held. 4504 */ 4505 static path_id_t 4506 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4507 { 4508 path_id_t pathid; 4509 int i, dunit, val; 4510 char buf[32]; 4511 4512 pathid = CAM_XPT_PATH_ID; 4513 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4514 i = -1; 4515 while ((i = resource_query_string(i, "at", buf)) != -1) { 4516 if (strcmp(resource_query_name(i), "scbus")) { 4517 /* Avoid a bit of foot shooting. */ 4518 continue; 4519 } 4520 dunit = resource_query_unit(i); 4521 if (dunit < 0) /* unwired?! */ 4522 continue; 4523 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4524 if (sim_bus == val) { 4525 pathid = dunit; 4526 break; 4527 } 4528 } else if (sim_bus == 0) { 4529 /* Unspecified matches bus 0 */ 4530 pathid = dunit; 4531 break; 4532 } else { 4533 kprintf("Ambiguous scbus configuration for %s%d " 4534 "bus %d, cannot wire down. The kernel " 4535 "config entry for scbus%d should " 4536 "specify a controller bus.\n" 4537 "Scbus will be assigned dynamically.\n", 4538 sim_name, sim_unit, sim_bus, dunit); 4539 break; 4540 } 4541 } 4542 4543 if (pathid == CAM_XPT_PATH_ID) 4544 pathid = xptnextfreepathid(); 4545 return (pathid); 4546 } 4547 4548 void 4549 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4550 { 4551 struct cam_eb *bus; 4552 struct cam_et *target, *next_target; 4553 struct cam_ed *device, *next_device; 4554 4555 sim_lock_assert_owned(path->bus->sim->lock); 4556 4557 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4558 4559 /* 4560 * Most async events come from a CAM interrupt context. In 4561 * a few cases, the error recovery code at the peripheral layer, 4562 * which may run from our SWI or a process context, may signal 4563 * deferred events with a call to xpt_async. 4564 */ 4565 4566 bus = path->bus; 4567 4568 if (async_code == AC_BUS_RESET) { 4569 /* Update our notion of when the last reset occurred */ 4570 microuptime(&bus->last_reset); 4571 } 4572 4573 for (target = TAILQ_FIRST(&bus->et_entries); 4574 target != NULL; 4575 target = next_target) { 4576 4577 next_target = TAILQ_NEXT(target, links); 4578 4579 if (path->target != target 4580 && path->target->target_id != CAM_TARGET_WILDCARD 4581 && target->target_id != CAM_TARGET_WILDCARD) 4582 continue; 4583 4584 if (async_code == AC_SENT_BDR) { 4585 /* Update our notion of when the last reset occurred */ 4586 microuptime(&path->target->last_reset); 4587 } 4588 4589 for (device = TAILQ_FIRST(&target->ed_entries); 4590 device != NULL; 4591 device = next_device) { 4592 4593 next_device = TAILQ_NEXT(device, links); 4594 4595 if (path->device != device 4596 && path->device->lun_id != CAM_LUN_WILDCARD 4597 && device->lun_id != CAM_LUN_WILDCARD) 4598 continue; 4599 4600 xpt_dev_async(async_code, bus, target, 4601 device, async_arg); 4602 4603 xpt_async_bcast(&device->asyncs, async_code, 4604 path, async_arg); 4605 } 4606 } 4607 4608 /* 4609 * If this wasn't a fully wildcarded async, tell all 4610 * clients that want all async events. 4611 */ 4612 if (bus != xpt_periph->path->bus) 4613 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4614 path, async_arg); 4615 } 4616 4617 static void 4618 xpt_async_bcast(struct async_list *async_head, 4619 u_int32_t async_code, 4620 struct cam_path *path, void *async_arg) 4621 { 4622 struct async_node *cur_entry; 4623 4624 cur_entry = SLIST_FIRST(async_head); 4625 while (cur_entry != NULL) { 4626 struct async_node *next_entry; 4627 /* 4628 * Grab the next list entry before we call the current 4629 * entry's callback. This is because the callback function 4630 * can delete its async callback entry. 4631 */ 4632 next_entry = SLIST_NEXT(cur_entry, links); 4633 if ((cur_entry->event_enable & async_code) != 0) 4634 cur_entry->callback(cur_entry->callback_arg, 4635 async_code, path, 4636 async_arg); 4637 cur_entry = next_entry; 4638 } 4639 } 4640 4641 /* 4642 * Handle any per-device event notifications that require action by the XPT. 4643 */ 4644 static void 4645 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4646 struct cam_ed *device, void *async_arg) 4647 { 4648 cam_status status; 4649 struct cam_path newpath; 4650 4651 /* 4652 * We only need to handle events for real devices. 4653 */ 4654 if (target->target_id == CAM_TARGET_WILDCARD 4655 || device->lun_id == CAM_LUN_WILDCARD) 4656 return; 4657 4658 /* 4659 * We need our own path with wildcards expanded to 4660 * handle certain types of events. 4661 */ 4662 if ((async_code == AC_SENT_BDR) 4663 || (async_code == AC_BUS_RESET) 4664 || (async_code == AC_INQ_CHANGED)) 4665 status = xpt_compile_path(&newpath, NULL, 4666 bus->path_id, 4667 target->target_id, 4668 device->lun_id); 4669 else 4670 status = CAM_REQ_CMP_ERR; 4671 4672 if (status == CAM_REQ_CMP) { 4673 4674 /* 4675 * Allow transfer negotiation to occur in a 4676 * tag free environment. 4677 */ 4678 if (async_code == AC_SENT_BDR 4679 || async_code == AC_BUS_RESET) 4680 xpt_toggle_tags(&newpath); 4681 4682 if (async_code == AC_INQ_CHANGED) { 4683 /* 4684 * We've sent a start unit command, or 4685 * something similar to a device that 4686 * may have caused its inquiry data to 4687 * change. So we re-scan the device to 4688 * refresh the inquiry data for it. 4689 */ 4690 xpt_scan_lun(newpath.periph, &newpath, 4691 CAM_EXPECT_INQ_CHANGE, NULL); 4692 } 4693 xpt_release_path(&newpath); 4694 } else if (async_code == AC_LOST_DEVICE) { 4695 /* 4696 * When we lose a device the device may be about to detach 4697 * the sim, we have to clear out all pending timeouts and 4698 * requests before that happens. 4699 * 4700 * This typically happens most often with USB/UMASS devices. 4701 * 4702 * XXX it would be nice if we could abort the requests 4703 * pertaining to the device. 4704 */ 4705 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4706 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4707 device->flags |= CAM_DEV_UNCONFIGURED; 4708 xpt_release_device(bus, target, device); 4709 } 4710 } else if (async_code == AC_TRANSFER_NEG) { 4711 struct ccb_trans_settings *settings; 4712 4713 settings = (struct ccb_trans_settings *)async_arg; 4714 xpt_set_transfer_settings(settings, device, 4715 /*async_update*/TRUE); 4716 } 4717 } 4718 4719 u_int32_t 4720 xpt_freeze_devq(struct cam_path *path, u_int count) 4721 { 4722 struct ccb_hdr *ccbh; 4723 4724 sim_lock_assert_owned(path->bus->sim->lock); 4725 4726 path->device->qfrozen_cnt += count; 4727 4728 /* 4729 * Mark the last CCB in the queue as needing 4730 * to be requeued if the driver hasn't 4731 * changed it's state yet. This fixes a race 4732 * where a ccb is just about to be queued to 4733 * a controller driver when it's interrupt routine 4734 * freezes the queue. To completly close the 4735 * hole, controller drives must check to see 4736 * if a ccb's status is still CAM_REQ_INPROG 4737 * just before they queue 4738 * the CCB. See ahc_action/ahc_freeze_devq for 4739 * an example. 4740 */ 4741 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4742 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4743 ccbh->status = CAM_REQUEUE_REQ; 4744 return (path->device->qfrozen_cnt); 4745 } 4746 4747 u_int32_t 4748 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4749 { 4750 sim_lock_assert_owned(sim->lock); 4751 4752 if (sim->devq == NULL) 4753 return(count); 4754 sim->devq->send_queue.qfrozen_cnt += count; 4755 if (sim->devq->active_dev != NULL) { 4756 struct ccb_hdr *ccbh; 4757 4758 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4759 ccb_hdr_tailq); 4760 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4761 ccbh->status = CAM_REQUEUE_REQ; 4762 } 4763 return (sim->devq->send_queue.qfrozen_cnt); 4764 } 4765 4766 /* 4767 * Release the device queue after a timeout has expired, typically used to 4768 * introduce a delay before retrying after an I/O error or other problem. 4769 */ 4770 static void 4771 xpt_release_devq_timeout(void *arg) 4772 { 4773 struct cam_ed *device; 4774 4775 device = (struct cam_ed *)arg; 4776 CAM_SIM_LOCK(device->sim); 4777 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4778 CAM_SIM_UNLOCK(device->sim); 4779 } 4780 4781 void 4782 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4783 { 4784 sim_lock_assert_owned(path->bus->sim->lock); 4785 4786 xpt_release_devq_device(path->device, count, run_queue); 4787 } 4788 4789 static void 4790 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4791 { 4792 int rundevq; 4793 4794 rundevq = 0; 4795 4796 if (dev->qfrozen_cnt > 0) { 4797 4798 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4799 dev->qfrozen_cnt -= count; 4800 if (dev->qfrozen_cnt == 0) { 4801 4802 /* 4803 * No longer need to wait for a successful 4804 * command completion. 4805 */ 4806 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4807 4808 /* 4809 * Remove any timeouts that might be scheduled 4810 * to release this queue. 4811 */ 4812 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4813 callout_stop(&dev->callout); 4814 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4815 } 4816 4817 /* 4818 * Now that we are unfrozen schedule the 4819 * device so any pending transactions are 4820 * run. 4821 */ 4822 if ((dev->ccbq.queue.entries > 0) 4823 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4824 && (run_queue != 0)) { 4825 rundevq = 1; 4826 } 4827 } 4828 } 4829 if (rundevq != 0) 4830 xpt_run_dev_sendq(dev->target->bus); 4831 } 4832 4833 void 4834 xpt_release_simq(struct cam_sim *sim, int run_queue) 4835 { 4836 struct camq *sendq; 4837 4838 sim_lock_assert_owned(sim->lock); 4839 4840 if (sim->devq == NULL) 4841 return; 4842 4843 sendq = &(sim->devq->send_queue); 4844 if (sendq->qfrozen_cnt > 0) { 4845 sendq->qfrozen_cnt--; 4846 if (sendq->qfrozen_cnt == 0) { 4847 struct cam_eb *bus; 4848 4849 /* 4850 * If there is a timeout scheduled to release this 4851 * sim queue, remove it. The queue frozen count is 4852 * already at 0. 4853 */ 4854 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4855 callout_stop(&sim->callout); 4856 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4857 } 4858 bus = xpt_find_bus(sim->path_id); 4859 4860 if (run_queue) { 4861 /* 4862 * Now that we are unfrozen run the send queue. 4863 */ 4864 xpt_run_dev_sendq(bus); 4865 } 4866 xpt_release_bus(bus); 4867 } 4868 } 4869 } 4870 4871 void 4872 xpt_done(union ccb *done_ccb) 4873 { 4874 struct cam_sim *sim; 4875 4876 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4877 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4878 /* 4879 * Queue up the request for handling by our SWI handler 4880 * any of the "non-immediate" type of ccbs. 4881 */ 4882 sim = done_ccb->ccb_h.path->bus->sim; 4883 switch (done_ccb->ccb_h.path->periph->type) { 4884 case CAM_PERIPH_BIO: 4885 spin_lock(&sim->sim_spin); 4886 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4887 sim_links.tqe); 4888 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4889 spin_unlock(&sim->sim_spin); 4890 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4891 spin_lock(&cam_simq_spin); 4892 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4893 TAILQ_INSERT_TAIL(&cam_simq, sim, 4894 links); 4895 sim->flags |= CAM_SIM_ON_DONEQ; 4896 } 4897 spin_unlock(&cam_simq_spin); 4898 } 4899 if ((done_ccb->ccb_h.flags & CAM_POLLED) == 0) 4900 setsoftcambio(); 4901 break; 4902 default: 4903 panic("unknown periph type %d", 4904 done_ccb->ccb_h.path->periph->type); 4905 } 4906 } 4907 } 4908 4909 union ccb * 4910 xpt_alloc_ccb(void) 4911 { 4912 union ccb *new_ccb; 4913 4914 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); 4915 return (new_ccb); 4916 } 4917 4918 void 4919 xpt_free_ccb(union ccb *free_ccb) 4920 { 4921 kfree(free_ccb, M_CAMXPT); 4922 } 4923 4924 4925 4926 /* Private XPT functions */ 4927 4928 /* 4929 * Get a CAM control block for the caller. Charge the structure to the device 4930 * referenced by the path. If the this device has no 'credits' then the 4931 * device already has the maximum number of outstanding operations under way 4932 * and we return NULL. If we don't have sufficient resources to allocate more 4933 * ccbs, we also return NULL. 4934 */ 4935 static union ccb * 4936 xpt_get_ccb(struct cam_ed *device) 4937 { 4938 union ccb *new_ccb; 4939 struct cam_sim *sim; 4940 4941 sim = device->sim; 4942 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4943 new_ccb = xpt_alloc_ccb(); 4944 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4945 callout_init(&new_ccb->ccb_h.timeout_ch); 4946 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4947 xpt_links.sle); 4948 sim->ccb_count++; 4949 } 4950 cam_ccbq_take_opening(&device->ccbq); 4951 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4952 return (new_ccb); 4953 } 4954 4955 static void 4956 xpt_release_bus(struct cam_eb *bus) 4957 { 4958 for (;;) { 4959 int count = bus->refcount; 4960 4961 cpu_ccfence(); 4962 if (count == 1) { 4963 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4964 if (atomic_cmpset_int(&bus->refcount, 1, 0)) { 4965 if (TAILQ_EMPTY(&bus->et_entries)) { 4966 TAILQ_REMOVE(&xsoftc.xpt_busses, 4967 bus, links); 4968 xsoftc.bus_generation++; 4969 kfree(bus, M_CAMXPT); 4970 } 4971 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4972 return; 4973 } 4974 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4975 } else { 4976 if (atomic_cmpset_int(&bus->refcount, count, count-1)) { 4977 return; 4978 } 4979 } 4980 } 4981 } 4982 4983 static struct cam_et * 4984 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4985 { 4986 struct cam_et *target; 4987 struct cam_et *cur_target; 4988 4989 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); 4990 4991 TAILQ_INIT(&target->ed_entries); 4992 target->bus = bus; 4993 target->target_id = target_id; 4994 target->refcount = 1; 4995 target->generation = 0; 4996 timevalclear(&target->last_reset); 4997 4998 /* 4999 * Hold a reference to our parent bus so it 5000 * will not go away before we do. 5001 */ 5002 atomic_add_int(&bus->refcount, 1); 5003 5004 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5005 /* Insertion sort into our bus's target list */ 5006 cur_target = TAILQ_FIRST(&bus->et_entries); 5007 while (cur_target != NULL && cur_target->target_id < target_id) 5008 cur_target = TAILQ_NEXT(cur_target, links); 5009 5010 if (cur_target != NULL) { 5011 TAILQ_INSERT_BEFORE(cur_target, target, links); 5012 } else { 5013 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 5014 } 5015 bus->generation++; 5016 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5017 5018 return (target); 5019 } 5020 5021 static void 5022 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 5023 { 5024 for (;;) { 5025 int count = target->refcount; 5026 5027 cpu_ccfence(); 5028 if (count == 1) { 5029 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5030 if (atomic_cmpset_int(&target->refcount, 1, 0)) { 5031 KKASSERT(TAILQ_EMPTY(&target->ed_entries)); 5032 TAILQ_REMOVE(&bus->et_entries, target, links); 5033 bus->generation++; 5034 kfree(target, M_CAMXPT); 5035 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5036 xpt_release_bus(bus); 5037 return; 5038 } 5039 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5040 } else { 5041 if (atomic_cmpset_int(&target->refcount, 5042 count, count - 1)) { 5043 return; 5044 } 5045 } 5046 } 5047 } 5048 5049 static struct cam_ed * 5050 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 5051 { 5052 struct cam_path path; 5053 struct cam_ed *device; 5054 struct cam_devq *devq; 5055 cam_status status; 5056 5057 /* 5058 * Disallow new devices while trying to deregister a sim 5059 */ 5060 if (bus->sim->flags & CAM_SIM_DEREGISTERED) 5061 return (NULL); 5062 5063 /* 5064 * Make space for us in the device queue on our bus 5065 */ 5066 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5067 devq = bus->sim->devq; 5068 if (devq == NULL) { 5069 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5070 return(NULL); 5071 } 5072 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 5073 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5074 5075 if (status != CAM_REQ_CMP) { 5076 device = NULL; 5077 } else { 5078 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); 5079 } 5080 5081 if (device != NULL) { 5082 struct cam_ed *cur_device; 5083 5084 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 5085 device->alloc_ccb_entry.device = device; 5086 cam_init_pinfo(&device->send_ccb_entry.pinfo); 5087 device->send_ccb_entry.device = device; 5088 device->target = target; 5089 device->lun_id = lun_id; 5090 device->sim = bus->sim; 5091 /* Initialize our queues */ 5092 if (camq_init(&device->drvq, 0) != 0) { 5093 kfree(device, M_CAMXPT); 5094 return (NULL); 5095 } 5096 if (cam_ccbq_init(&device->ccbq, 5097 bus->sim->max_dev_openings) != 0) { 5098 camq_fini(&device->drvq); 5099 kfree(device, M_CAMXPT); 5100 return (NULL); 5101 } 5102 SLIST_INIT(&device->asyncs); 5103 SLIST_INIT(&device->periphs); 5104 device->generation = 0; 5105 device->owner = NULL; 5106 /* 5107 * Take the default quirk entry until we have inquiry 5108 * data and can determine a better quirk to use. 5109 */ 5110 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 5111 bzero(&device->inq_data, sizeof(device->inq_data)); 5112 device->inq_flags = 0; 5113 device->queue_flags = 0; 5114 device->serial_num = NULL; 5115 device->serial_num_len = 0; 5116 device->qfrozen_cnt = 0; 5117 device->flags = CAM_DEV_UNCONFIGURED; 5118 device->tag_delay_count = 0; 5119 device->tag_saved_openings = 0; 5120 device->refcount = 1; 5121 callout_init(&device->callout); 5122 5123 /* 5124 * Hold a reference to our parent target so it 5125 * will not go away before we do. 5126 */ 5127 atomic_add_int(&target->refcount, 1); 5128 5129 /* 5130 * XXX should be limited by number of CCBs this bus can 5131 * do. 5132 */ 5133 bus->sim->max_ccbs += device->ccbq.devq_openings; 5134 /* Insertion sort into our target's device list */ 5135 cur_device = TAILQ_FIRST(&target->ed_entries); 5136 while (cur_device != NULL && cur_device->lun_id < lun_id) 5137 cur_device = TAILQ_NEXT(cur_device, links); 5138 if (cur_device != NULL) { 5139 TAILQ_INSERT_BEFORE(cur_device, device, links); 5140 } else { 5141 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 5142 } 5143 target->generation++; 5144 if (lun_id != CAM_LUN_WILDCARD) { 5145 xpt_compile_path(&path, 5146 NULL, 5147 bus->path_id, 5148 target->target_id, 5149 lun_id); 5150 xpt_devise_transport(&path); 5151 xpt_release_path(&path); 5152 } 5153 } 5154 return (device); 5155 } 5156 5157 static void 5158 xpt_reference_device(struct cam_ed *device) 5159 { 5160 atomic_add_int(&device->refcount, 1); 5161 } 5162 5163 static void 5164 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 5165 struct cam_ed *device) 5166 { 5167 struct cam_devq *devq; 5168 5169 for (;;) { 5170 int count = device->refcount; 5171 5172 if (count == 1) { 5173 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5174 if (atomic_cmpset_int(&device->refcount, 1, 0)) { 5175 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 5176 if (device->alloc_ccb_entry.pinfo.index != 5177 CAM_UNQUEUED_INDEX || 5178 device->send_ccb_entry.pinfo.index != 5179 CAM_UNQUEUED_INDEX) { 5180 panic("Removing device while " 5181 "still queued for ccbs"); 5182 } 5183 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 5184 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 5185 callout_stop(&device->callout); 5186 } 5187 TAILQ_REMOVE(&target->ed_entries, device, links); 5188 target->generation++; 5189 bus->sim->max_ccbs -= device->ccbq.devq_openings; 5190 if ((devq = bus->sim->devq) != NULL) { 5191 /* Release our slot in the devq */ 5192 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 5193 } 5194 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5195 5196 camq_fini(&device->drvq); 5197 camq_fini(&device->ccbq.queue); 5198 xpt_release_target(bus, target); 5199 kfree(device, M_CAMXPT); 5200 return; 5201 } 5202 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5203 } else { 5204 if (atomic_cmpset_int(&device->refcount, 5205 count, count - 1)) { 5206 return; 5207 } 5208 } 5209 } 5210 } 5211 5212 static u_int32_t 5213 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5214 { 5215 int diff; 5216 int result; 5217 struct cam_ed *dev; 5218 5219 dev = path->device; 5220 5221 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 5222 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5223 if (result == CAM_REQ_CMP && (diff < 0)) { 5224 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 5225 } 5226 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5227 || (dev->inq_flags & SID_CmdQue) != 0) 5228 dev->tag_saved_openings = newopenings; 5229 /* Adjust the global limit */ 5230 dev->sim->max_ccbs += diff; 5231 return (result); 5232 } 5233 5234 static struct cam_eb * 5235 xpt_find_bus(path_id_t path_id) 5236 { 5237 struct cam_eb *bus; 5238 5239 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5240 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 5241 if (bus->path_id == path_id) { 5242 atomic_add_int(&bus->refcount, 1); 5243 break; 5244 } 5245 } 5246 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5247 5248 return (bus); 5249 } 5250 5251 static struct cam_et * 5252 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5253 { 5254 struct cam_et *target; 5255 5256 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5257 TAILQ_FOREACH(target, &bus->et_entries, links) { 5258 if (target->target_id == target_id) { 5259 atomic_add_int(&target->refcount, 1); 5260 break; 5261 } 5262 } 5263 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5264 5265 return (target); 5266 } 5267 5268 static struct cam_ed * 5269 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5270 { 5271 struct cam_ed *device; 5272 5273 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5274 TAILQ_FOREACH(device, &target->ed_entries, links) { 5275 if (device->lun_id == lun_id) { 5276 atomic_add_int(&device->refcount, 1); 5277 break; 5278 } 5279 } 5280 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5281 5282 return (device); 5283 } 5284 5285 typedef struct { 5286 union ccb *request_ccb; 5287 struct ccb_pathinq *cpi; 5288 int counter; 5289 } xpt_scan_bus_info; 5290 5291 /* 5292 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5293 * As the scan progresses, xpt_scan_bus is used as the 5294 * callback on completion function. 5295 */ 5296 static void 5297 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5298 { 5299 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5300 ("xpt_scan_bus\n")); 5301 switch (request_ccb->ccb_h.func_code) { 5302 case XPT_SCAN_BUS: 5303 { 5304 xpt_scan_bus_info *scan_info; 5305 union ccb *work_ccb; 5306 struct cam_path *path; 5307 u_int i; 5308 u_int max_target; 5309 u_int initiator_id; 5310 5311 /* Find out the characteristics of the bus */ 5312 work_ccb = xpt_alloc_ccb(); 5313 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5314 request_ccb->ccb_h.pinfo.priority); 5315 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5316 xpt_action(work_ccb); 5317 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5318 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5319 xpt_free_ccb(work_ccb); 5320 xpt_done(request_ccb); 5321 return; 5322 } 5323 5324 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5325 /* 5326 * Can't scan the bus on an adapter that 5327 * cannot perform the initiator role. 5328 */ 5329 request_ccb->ccb_h.status = CAM_REQ_CMP; 5330 xpt_free_ccb(work_ccb); 5331 xpt_done(request_ccb); 5332 return; 5333 } 5334 5335 /* Save some state for use while we probe for devices */ 5336 scan_info = (xpt_scan_bus_info *) 5337 kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); 5338 scan_info->request_ccb = request_ccb; 5339 scan_info->cpi = &work_ccb->cpi; 5340 5341 /* Cache on our stack so we can work asynchronously */ 5342 max_target = scan_info->cpi->max_target; 5343 initiator_id = scan_info->cpi->initiator_id; 5344 5345 5346 /* 5347 * We can scan all targets in parallel, or do it sequentially. 5348 */ 5349 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5350 max_target = 0; 5351 scan_info->counter = 0; 5352 } else { 5353 scan_info->counter = scan_info->cpi->max_target + 1; 5354 if (scan_info->cpi->initiator_id < scan_info->counter) { 5355 scan_info->counter--; 5356 } 5357 } 5358 5359 for (i = 0; i <= max_target; i++) { 5360 cam_status status; 5361 if (i == initiator_id) 5362 continue; 5363 5364 status = xpt_create_path(&path, xpt_periph, 5365 request_ccb->ccb_h.path_id, 5366 i, 0); 5367 if (status != CAM_REQ_CMP) { 5368 kprintf("xpt_scan_bus: xpt_create_path failed" 5369 " with status %#x, bus scan halted\n", 5370 status); 5371 kfree(scan_info, M_CAMXPT); 5372 request_ccb->ccb_h.status = status; 5373 xpt_free_ccb(work_ccb); 5374 xpt_done(request_ccb); 5375 break; 5376 } 5377 work_ccb = xpt_alloc_ccb(); 5378 xpt_setup_ccb(&work_ccb->ccb_h, path, 5379 request_ccb->ccb_h.pinfo.priority); 5380 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5381 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5382 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5383 work_ccb->crcn.flags = request_ccb->crcn.flags; 5384 xpt_action(work_ccb); 5385 } 5386 break; 5387 } 5388 case XPT_SCAN_LUN: 5389 { 5390 cam_status status; 5391 struct cam_path *path; 5392 xpt_scan_bus_info *scan_info; 5393 path_id_t path_id; 5394 target_id_t target_id; 5395 lun_id_t lun_id; 5396 5397 /* Reuse the same CCB to query if a device was really found */ 5398 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5399 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5400 request_ccb->ccb_h.pinfo.priority); 5401 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5402 5403 path_id = request_ccb->ccb_h.path_id; 5404 target_id = request_ccb->ccb_h.target_id; 5405 lun_id = request_ccb->ccb_h.target_lun; 5406 xpt_action(request_ccb); 5407 5408 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5409 struct cam_ed *device; 5410 struct cam_et *target; 5411 int phl; 5412 5413 /* 5414 * If we already probed lun 0 successfully, or 5415 * we have additional configured luns on this 5416 * target that might have "gone away", go onto 5417 * the next lun. 5418 */ 5419 target = request_ccb->ccb_h.path->target; 5420 /* 5421 * We may touch devices that we don't 5422 * hold references too, so ensure they 5423 * don't disappear out from under us. 5424 * The target above is referenced by the 5425 * path in the request ccb. 5426 */ 5427 phl = 0; 5428 device = TAILQ_FIRST(&target->ed_entries); 5429 if (device != NULL) { 5430 phl = CAN_SRCH_HI_SPARSE(device); 5431 if (device->lun_id == 0) 5432 device = TAILQ_NEXT(device, links); 5433 } 5434 if ((lun_id != 0) || (device != NULL)) { 5435 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5436 lun_id++; 5437 } 5438 } else { 5439 struct cam_ed *device; 5440 5441 device = request_ccb->ccb_h.path->device; 5442 5443 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5444 /* Try the next lun */ 5445 if (lun_id < (CAM_SCSI2_MAXLUN-1) 5446 || CAN_SRCH_HI_DENSE(device)) 5447 lun_id++; 5448 } 5449 } 5450 5451 /* 5452 * Free the current request path- we're done with it. 5453 */ 5454 xpt_free_path(request_ccb->ccb_h.path); 5455 5456 /* 5457 * Check to see if we scan any further luns. 5458 */ 5459 if (lun_id == request_ccb->ccb_h.target_lun 5460 || lun_id > scan_info->cpi->max_lun) { 5461 int done; 5462 5463 hop_again: 5464 done = 0; 5465 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5466 scan_info->counter++; 5467 if (scan_info->counter == 5468 scan_info->cpi->initiator_id) { 5469 scan_info->counter++; 5470 } 5471 if (scan_info->counter >= 5472 scan_info->cpi->max_target+1) { 5473 done = 1; 5474 } 5475 } else { 5476 scan_info->counter--; 5477 if (scan_info->counter == 0) { 5478 done = 1; 5479 } 5480 } 5481 if (done) { 5482 xpt_free_ccb(request_ccb); 5483 xpt_free_ccb((union ccb *)scan_info->cpi); 5484 request_ccb = scan_info->request_ccb; 5485 kfree(scan_info, M_CAMXPT); 5486 request_ccb->ccb_h.status = CAM_REQ_CMP; 5487 xpt_done(request_ccb); 5488 break; 5489 } 5490 5491 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { 5492 break; 5493 } 5494 status = xpt_create_path(&path, xpt_periph, 5495 scan_info->request_ccb->ccb_h.path_id, 5496 scan_info->counter, 0); 5497 if (status != CAM_REQ_CMP) { 5498 kprintf("xpt_scan_bus: xpt_create_path failed" 5499 " with status %#x, bus scan halted\n", 5500 status); 5501 xpt_free_ccb(request_ccb); 5502 xpt_free_ccb((union ccb *)scan_info->cpi); 5503 request_ccb = scan_info->request_ccb; 5504 kfree(scan_info, M_CAMXPT); 5505 request_ccb->ccb_h.status = status; 5506 xpt_done(request_ccb); 5507 break; 5508 } 5509 xpt_setup_ccb(&request_ccb->ccb_h, path, 5510 request_ccb->ccb_h.pinfo.priority); 5511 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5512 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5513 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5514 request_ccb->crcn.flags = 5515 scan_info->request_ccb->crcn.flags; 5516 } else { 5517 status = xpt_create_path(&path, xpt_periph, 5518 path_id, target_id, lun_id); 5519 if (status != CAM_REQ_CMP) { 5520 kprintf("xpt_scan_bus: xpt_create_path failed " 5521 "with status %#x, halting LUN scan\n", 5522 status); 5523 goto hop_again; 5524 } 5525 xpt_setup_ccb(&request_ccb->ccb_h, path, 5526 request_ccb->ccb_h.pinfo.priority); 5527 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5528 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5529 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5530 request_ccb->crcn.flags = 5531 scan_info->request_ccb->crcn.flags; 5532 } 5533 xpt_action(request_ccb); 5534 break; 5535 } 5536 default: 5537 break; 5538 } 5539 } 5540 5541 typedef enum { 5542 PROBE_TUR, 5543 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ 5544 PROBE_FULL_INQUIRY, 5545 PROBE_MODE_SENSE, 5546 PROBE_SERIAL_NUM_0, 5547 PROBE_SERIAL_NUM_1, 5548 PROBE_TUR_FOR_NEGOTIATION, 5549 PROBE_INQUIRY_BASIC_DV1, 5550 PROBE_INQUIRY_BASIC_DV2, 5551 PROBE_DV_EXIT, 5552 PROBE_INVALID 5553 } probe_action; 5554 5555 static char *probe_action_text[] = { 5556 "PROBE_TUR", 5557 "PROBE_INQUIRY", 5558 "PROBE_FULL_INQUIRY", 5559 "PROBE_MODE_SENSE", 5560 "PROBE_SERIAL_NUM_0", 5561 "PROBE_SERIAL_NUM_1", 5562 "PROBE_TUR_FOR_NEGOTIATION", 5563 "PROBE_INQUIRY_BASIC_DV1", 5564 "PROBE_INQUIRY_BASIC_DV2", 5565 "PROBE_DV_EXIT", 5566 "PROBE_INVALID" 5567 }; 5568 5569 #define PROBE_SET_ACTION(softc, newaction) \ 5570 do { \ 5571 char **text; \ 5572 text = probe_action_text; \ 5573 CAM_DEBUG((softc)->periph->path, CAM_DEBUG_INFO, \ 5574 ("Probe %s to %s\n", text[(softc)->action], \ 5575 text[(newaction)])); \ 5576 (softc)->action = (newaction); \ 5577 } while(0) 5578 5579 typedef enum { 5580 PROBE_INQUIRY_CKSUM = 0x01, 5581 PROBE_SERIAL_CKSUM = 0x02, 5582 PROBE_NO_ANNOUNCE = 0x04 5583 } probe_flags; 5584 5585 typedef struct { 5586 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5587 probe_action action; 5588 union ccb saved_ccb; 5589 probe_flags flags; 5590 MD5_CTX context; 5591 u_int8_t digest[16]; 5592 struct cam_periph *periph; 5593 } probe_softc; 5594 5595 static void 5596 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5597 cam_flags flags, union ccb *request_ccb) 5598 { 5599 struct ccb_pathinq cpi; 5600 cam_status status; 5601 struct cam_path *new_path; 5602 struct cam_periph *old_periph; 5603 5604 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5605 ("xpt_scan_lun\n")); 5606 5607 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5608 cpi.ccb_h.func_code = XPT_PATH_INQ; 5609 xpt_action((union ccb *)&cpi); 5610 5611 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5612 if (request_ccb != NULL) { 5613 request_ccb->ccb_h.status = cpi.ccb_h.status; 5614 xpt_done(request_ccb); 5615 } 5616 return; 5617 } 5618 5619 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5620 /* 5621 * Can't scan the bus on an adapter that 5622 * cannot perform the initiator role. 5623 */ 5624 if (request_ccb != NULL) { 5625 request_ccb->ccb_h.status = CAM_REQ_CMP; 5626 xpt_done(request_ccb); 5627 } 5628 return; 5629 } 5630 5631 if (request_ccb == NULL) { 5632 request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); 5633 new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); 5634 status = xpt_compile_path(new_path, xpt_periph, 5635 path->bus->path_id, 5636 path->target->target_id, 5637 path->device->lun_id); 5638 5639 if (status != CAM_REQ_CMP) { 5640 xpt_print(path, "xpt_scan_lun: can't compile path, " 5641 "can't continue\n"); 5642 kfree(request_ccb, M_CAMXPT); 5643 kfree(new_path, M_CAMXPT); 5644 return; 5645 } 5646 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5647 request_ccb->ccb_h.cbfcnp = xptscandone; 5648 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5649 request_ccb->crcn.flags = flags; 5650 } 5651 5652 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5653 probe_softc *softc; 5654 5655 softc = (probe_softc *)old_periph->softc; 5656 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5657 periph_links.tqe); 5658 } else { 5659 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5660 probestart, "probe", 5661 CAM_PERIPH_BIO, 5662 request_ccb->ccb_h.path, NULL, 0, 5663 request_ccb); 5664 5665 if (status != CAM_REQ_CMP) { 5666 xpt_print(path, "xpt_scan_lun: cam_alloc_periph " 5667 "returned an error, can't continue probe\n"); 5668 request_ccb->ccb_h.status = status; 5669 xpt_done(request_ccb); 5670 } 5671 } 5672 } 5673 5674 static void 5675 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5676 { 5677 xpt_release_path(done_ccb->ccb_h.path); 5678 kfree(done_ccb->ccb_h.path, M_CAMXPT); 5679 kfree(done_ccb, M_CAMXPT); 5680 } 5681 5682 static cam_status 5683 proberegister(struct cam_periph *periph, void *arg) 5684 { 5685 union ccb *request_ccb; /* CCB representing the probe request */ 5686 cam_status status; 5687 probe_softc *softc; 5688 5689 request_ccb = (union ccb *)arg; 5690 if (periph == NULL) { 5691 kprintf("proberegister: periph was NULL!!\n"); 5692 return(CAM_REQ_CMP_ERR); 5693 } 5694 5695 if (request_ccb == NULL) { 5696 kprintf("proberegister: no probe CCB, " 5697 "can't register device\n"); 5698 return(CAM_REQ_CMP_ERR); 5699 } 5700 5701 softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); 5702 TAILQ_INIT(&softc->request_ccbs); 5703 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5704 periph_links.tqe); 5705 softc->flags = 0; 5706 periph->softc = softc; 5707 softc->periph = periph; 5708 softc->action = PROBE_INVALID; 5709 status = cam_periph_acquire(periph); 5710 if (status != CAM_REQ_CMP) { 5711 return (status); 5712 } 5713 5714 5715 /* 5716 * Ensure we've waited at least a bus settle 5717 * delay before attempting to probe the device. 5718 * For HBAs that don't do bus resets, this won't make a difference. 5719 */ 5720 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5721 scsi_delay); 5722 probeschedule(periph); 5723 return(CAM_REQ_CMP); 5724 } 5725 5726 static void 5727 probeschedule(struct cam_periph *periph) 5728 { 5729 struct ccb_pathinq cpi; 5730 union ccb *ccb; 5731 probe_softc *softc; 5732 5733 softc = (probe_softc *)periph->softc; 5734 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5735 5736 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5737 cpi.ccb_h.func_code = XPT_PATH_INQ; 5738 xpt_action((union ccb *)&cpi); 5739 5740 /* 5741 * If a device has gone away and another device, or the same one, 5742 * is back in the same place, it should have a unit attention 5743 * condition pending. It will not report the unit attention in 5744 * response to an inquiry, which may leave invalid transfer 5745 * negotiations in effect. The TUR will reveal the unit attention 5746 * condition. Only send the TUR for lun 0, since some devices 5747 * will get confused by commands other than inquiry to non-existent 5748 * luns. If you think a device has gone away start your scan from 5749 * lun 0. This will insure that any bogus transfer settings are 5750 * invalidated. 5751 * 5752 * If we haven't seen the device before and the controller supports 5753 * some kind of transfer negotiation, negotiate with the first 5754 * sent command if no bus reset was performed at startup. This 5755 * ensures that the device is not confused by transfer negotiation 5756 * settings left over by loader or BIOS action. 5757 */ 5758 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5759 && (ccb->ccb_h.target_lun == 0)) { 5760 PROBE_SET_ACTION(softc, PROBE_TUR); 5761 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5762 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5763 proberequestdefaultnegotiation(periph); 5764 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 5765 } else { 5766 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 5767 } 5768 5769 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5770 softc->flags |= PROBE_NO_ANNOUNCE; 5771 else 5772 softc->flags &= ~PROBE_NO_ANNOUNCE; 5773 5774 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5775 } 5776 5777 static void 5778 probestart(struct cam_periph *periph, union ccb *start_ccb) 5779 { 5780 /* Probe the device that our peripheral driver points to */ 5781 struct ccb_scsiio *csio; 5782 probe_softc *softc; 5783 5784 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5785 5786 softc = (probe_softc *)periph->softc; 5787 csio = &start_ccb->csio; 5788 5789 switch (softc->action) { 5790 case PROBE_TUR: 5791 case PROBE_TUR_FOR_NEGOTIATION: 5792 case PROBE_DV_EXIT: 5793 { 5794 scsi_test_unit_ready(csio, 5795 /*retries*/4, 5796 probedone, 5797 MSG_SIMPLE_Q_TAG, 5798 SSD_FULL_SIZE, 5799 /*timeout*/60000); 5800 break; 5801 } 5802 case PROBE_INQUIRY: 5803 case PROBE_FULL_INQUIRY: 5804 case PROBE_INQUIRY_BASIC_DV1: 5805 case PROBE_INQUIRY_BASIC_DV2: 5806 { 5807 u_int inquiry_len; 5808 struct scsi_inquiry_data *inq_buf; 5809 5810 inq_buf = &periph->path->device->inq_data; 5811 5812 /* 5813 * If the device is currently configured, we calculate an 5814 * MD5 checksum of the inquiry data, and if the serial number 5815 * length is greater than 0, add the serial number data 5816 * into the checksum as well. Once the inquiry and the 5817 * serial number check finish, we attempt to figure out 5818 * whether we still have the same device. 5819 */ 5820 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5821 5822 MD5Init(&softc->context); 5823 MD5Update(&softc->context, (unsigned char *)inq_buf, 5824 sizeof(struct scsi_inquiry_data)); 5825 softc->flags |= PROBE_INQUIRY_CKSUM; 5826 if (periph->path->device->serial_num_len > 0) { 5827 MD5Update(&softc->context, 5828 periph->path->device->serial_num, 5829 periph->path->device->serial_num_len); 5830 softc->flags |= PROBE_SERIAL_CKSUM; 5831 } 5832 MD5Final(softc->digest, &softc->context); 5833 } 5834 5835 if (softc->action == PROBE_INQUIRY) 5836 inquiry_len = SHORT_INQUIRY_LENGTH; 5837 else 5838 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); 5839 5840 /* 5841 * Some parallel SCSI devices fail to send an 5842 * ignore wide residue message when dealing with 5843 * odd length inquiry requests. Round up to be 5844 * safe. 5845 */ 5846 inquiry_len = roundup2(inquiry_len, 2); 5847 5848 if (softc->action == PROBE_INQUIRY_BASIC_DV1 5849 || softc->action == PROBE_INQUIRY_BASIC_DV2) { 5850 inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); 5851 } 5852 scsi_inquiry(csio, 5853 /*retries*/4, 5854 probedone, 5855 MSG_SIMPLE_Q_TAG, 5856 (u_int8_t *)inq_buf, 5857 inquiry_len, 5858 /*evpd*/FALSE, 5859 /*page_code*/0, 5860 SSD_MIN_SIZE, 5861 /*timeout*/60 * 1000); 5862 break; 5863 } 5864 case PROBE_MODE_SENSE: 5865 { 5866 void *mode_buf; 5867 int mode_buf_len; 5868 5869 mode_buf_len = sizeof(struct scsi_mode_header_6) 5870 + sizeof(struct scsi_mode_blk_desc) 5871 + sizeof(struct scsi_control_page); 5872 mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); 5873 scsi_mode_sense(csio, 5874 /*retries*/4, 5875 probedone, 5876 MSG_SIMPLE_Q_TAG, 5877 /*dbd*/FALSE, 5878 SMS_PAGE_CTRL_CURRENT, 5879 SMS_CONTROL_MODE_PAGE, 5880 mode_buf, 5881 mode_buf_len, 5882 SSD_FULL_SIZE, 5883 /*timeout*/60000); 5884 break; 5885 } 5886 case PROBE_SERIAL_NUM_0: 5887 { 5888 struct scsi_vpd_supported_page_list *vpd_list = NULL; 5889 struct cam_ed *device; 5890 5891 device = periph->path->device; 5892 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5893 vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, 5894 M_INTWAIT | M_ZERO); 5895 } 5896 5897 if (vpd_list != NULL) { 5898 scsi_inquiry(csio, 5899 /*retries*/4, 5900 probedone, 5901 MSG_SIMPLE_Q_TAG, 5902 (u_int8_t *)vpd_list, 5903 sizeof(*vpd_list), 5904 /*evpd*/TRUE, 5905 SVPD_SUPPORTED_PAGE_LIST, 5906 SSD_MIN_SIZE, 5907 /*timeout*/60 * 1000); 5908 break; 5909 } 5910 /* 5911 * We'll have to do without, let our probedone 5912 * routine finish up for us. 5913 */ 5914 start_ccb->csio.data_ptr = NULL; 5915 probedone(periph, start_ccb); 5916 return; 5917 } 5918 case PROBE_SERIAL_NUM_1: 5919 { 5920 struct scsi_vpd_unit_serial_number *serial_buf; 5921 struct cam_ed* device; 5922 5923 serial_buf = NULL; 5924 device = periph->path->device; 5925 device->serial_num = NULL; 5926 device->serial_num_len = 0; 5927 5928 serial_buf = (struct scsi_vpd_unit_serial_number *) 5929 kmalloc(sizeof(*serial_buf), M_CAMXPT, 5930 M_INTWAIT | M_ZERO); 5931 scsi_inquiry(csio, 5932 /*retries*/4, 5933 probedone, 5934 MSG_SIMPLE_Q_TAG, 5935 (u_int8_t *)serial_buf, 5936 sizeof(*serial_buf), 5937 /*evpd*/TRUE, 5938 SVPD_UNIT_SERIAL_NUMBER, 5939 SSD_MIN_SIZE, 5940 /*timeout*/60 * 1000); 5941 break; 5942 } 5943 case PROBE_INVALID: 5944 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO, 5945 ("probestart: invalid action state\n")); 5946 default: 5947 break; 5948 } 5949 xpt_action(start_ccb); 5950 } 5951 5952 static void 5953 proberequestdefaultnegotiation(struct cam_periph *periph) 5954 { 5955 struct ccb_trans_settings cts; 5956 5957 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5958 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5959 cts.type = CTS_TYPE_USER_SETTINGS; 5960 xpt_action((union ccb *)&cts); 5961 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5962 return; 5963 } 5964 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5965 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5966 xpt_action((union ccb *)&cts); 5967 } 5968 5969 /* 5970 * Backoff Negotiation Code- only pertinent for SPI devices. 5971 */ 5972 static int 5973 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) 5974 { 5975 struct ccb_trans_settings cts; 5976 struct ccb_trans_settings_spi *spi; 5977 5978 memset(&cts, 0, sizeof (cts)); 5979 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5980 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5981 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5982 xpt_action((union ccb *)&cts); 5983 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5984 if (bootverbose) { 5985 xpt_print(periph->path, 5986 "failed to get current device settings\n"); 5987 } 5988 return (0); 5989 } 5990 if (cts.transport != XPORT_SPI) { 5991 if (bootverbose) { 5992 xpt_print(periph->path, "not SPI transport\n"); 5993 } 5994 return (0); 5995 } 5996 spi = &cts.xport_specific.spi; 5997 5998 /* 5999 * We cannot renegotiate sync rate if we don't have one. 6000 */ 6001 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { 6002 if (bootverbose) { 6003 xpt_print(periph->path, "no sync rate known\n"); 6004 } 6005 return (0); 6006 } 6007 6008 /* 6009 * We'll assert that we don't have to touch PPR options- the 6010 * SIM will see what we do with period and offset and adjust 6011 * the PPR options as appropriate. 6012 */ 6013 6014 /* 6015 * A sync rate with unknown or zero offset is nonsensical. 6016 * A sync period of zero means Async. 6017 */ 6018 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 6019 || spi->sync_offset == 0 || spi->sync_period == 0) { 6020 if (bootverbose) { 6021 xpt_print(periph->path, "no sync rate available\n"); 6022 } 6023 return (0); 6024 } 6025 6026 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { 6027 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6028 ("hit async: giving up on DV\n")); 6029 return (0); 6030 } 6031 6032 6033 /* 6034 * Jump sync_period up by one, but stop at 5MHz and fall back to Async. 6035 * We don't try to remember 'last' settings to see if the SIM actually 6036 * gets into the speed we want to set. We check on the SIM telling 6037 * us that a requested speed is bad, but otherwise don't try and 6038 * check the speed due to the asynchronous and handshake nature 6039 * of speed setting. 6040 */ 6041 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; 6042 for (;;) { 6043 spi->sync_period++; 6044 if (spi->sync_period >= 0xf) { 6045 spi->sync_period = 0; 6046 spi->sync_offset = 0; 6047 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6048 ("setting to async for DV\n")); 6049 /* 6050 * Once we hit async, we don't want to try 6051 * any more settings. 6052 */ 6053 device->flags |= CAM_DEV_DV_HIT_BOTTOM; 6054 } else if (bootverbose) { 6055 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6056 ("DV: period 0x%x\n", spi->sync_period)); 6057 kprintf("setting period to 0x%x\n", spi->sync_period); 6058 } 6059 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6060 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6061 xpt_action((union ccb *)&cts); 6062 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6063 break; 6064 } 6065 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6066 ("DV: failed to set period 0x%x\n", spi->sync_period)); 6067 if (spi->sync_period == 0) { 6068 return (0); 6069 } 6070 } 6071 return (1); 6072 } 6073 6074 static void 6075 probedone(struct cam_periph *periph, union ccb *done_ccb) 6076 { 6077 probe_softc *softc; 6078 struct cam_path *path; 6079 u_int32_t priority; 6080 6081 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 6082 6083 softc = (probe_softc *)periph->softc; 6084 path = done_ccb->ccb_h.path; 6085 priority = done_ccb->ccb_h.pinfo.priority; 6086 6087 switch (softc->action) { 6088 case PROBE_TUR: 6089 { 6090 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6091 6092 if (cam_periph_error(done_ccb, 0, 6093 SF_NO_PRINT, NULL) == ERESTART) 6094 return; 6095 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 6096 /* Don't wedge the queue */ 6097 xpt_release_devq(done_ccb->ccb_h.path, 6098 /*count*/1, 6099 /*run_queue*/TRUE); 6100 } 6101 PROBE_SET_ACTION(softc, PROBE_INQUIRY); 6102 xpt_release_ccb(done_ccb); 6103 xpt_schedule(periph, priority); 6104 return; 6105 } 6106 case PROBE_INQUIRY: 6107 case PROBE_FULL_INQUIRY: 6108 { 6109 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6110 struct scsi_inquiry_data *inq_buf; 6111 u_int8_t periph_qual; 6112 6113 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 6114 inq_buf = &path->device->inq_data; 6115 6116 periph_qual = SID_QUAL(inq_buf); 6117 6118 switch(periph_qual) { 6119 case SID_QUAL_LU_CONNECTED: 6120 { 6121 u_int8_t len; 6122 6123 /* 6124 * We conservatively request only 6125 * SHORT_INQUIRY_LEN bytes of inquiry 6126 * information during our first try 6127 * at sending an INQUIRY. If the device 6128 * has more information to give, 6129 * perform a second request specifying 6130 * the amount of information the device 6131 * is willing to give. 6132 */ 6133 len = inq_buf->additional_length 6134 + offsetof(struct scsi_inquiry_data, 6135 additional_length) + 1; 6136 if (softc->action == PROBE_INQUIRY 6137 && len > SHORT_INQUIRY_LENGTH) { 6138 PROBE_SET_ACTION(softc, 6139 PROBE_FULL_INQUIRY); 6140 xpt_release_ccb(done_ccb); 6141 xpt_schedule(periph, priority); 6142 return; 6143 } 6144 6145 xpt_find_quirk(path->device); 6146 6147 xpt_devise_transport(path); 6148 if (INQ_DATA_TQ_ENABLED(inq_buf)) 6149 PROBE_SET_ACTION(softc, PROBE_MODE_SENSE); 6150 else 6151 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0); 6152 6153 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 6154 xpt_reference_device(path->device); 6155 6156 xpt_release_ccb(done_ccb); 6157 xpt_schedule(periph, priority); 6158 return; 6159 } 6160 default: 6161 break; 6162 } 6163 } else if (cam_periph_error(done_ccb, 0, 6164 done_ccb->ccb_h.target_lun > 0 6165 ? SF_RETRY_UA|SF_QUIET_IR|SF_NO_PRINT 6166 : SF_RETRY_UA|SF_NO_PRINT, 6167 &softc->saved_ccb) == ERESTART) { 6168 return; 6169 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6170 /* Don't wedge the queue */ 6171 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6172 /*run_queue*/TRUE); 6173 } 6174 /* 6175 * If we get to this point, we got an error status back 6176 * from the inquiry and the error status doesn't require 6177 * automatically retrying the command. Therefore, the 6178 * inquiry failed. If we had inquiry information before 6179 * for this device, but this latest inquiry command failed, 6180 * the device has probably gone away. If this device isn't 6181 * already marked unconfigured, notify the peripheral 6182 * drivers that this device is no more. 6183 */ 6184 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 6185 /* Send the async notification. */ 6186 xpt_async(AC_LOST_DEVICE, path, NULL); 6187 } 6188 6189 xpt_release_ccb(done_ccb); 6190 break; 6191 } 6192 case PROBE_MODE_SENSE: 6193 { 6194 struct ccb_scsiio *csio; 6195 struct scsi_mode_header_6 *mode_hdr; 6196 6197 csio = &done_ccb->csio; 6198 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 6199 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6200 struct scsi_control_page *page; 6201 u_int8_t *offset; 6202 6203 offset = ((u_int8_t *)&mode_hdr[1]) 6204 + mode_hdr->blk_desc_len; 6205 page = (struct scsi_control_page *)offset; 6206 path->device->queue_flags = page->queue_flags; 6207 } else if (cam_periph_error(done_ccb, 0, 6208 SF_RETRY_UA|SF_NO_PRINT, 6209 &softc->saved_ccb) == ERESTART) { 6210 return; 6211 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6212 /* Don't wedge the queue */ 6213 xpt_release_devq(done_ccb->ccb_h.path, 6214 /*count*/1, /*run_queue*/TRUE); 6215 } 6216 xpt_release_ccb(done_ccb); 6217 kfree(mode_hdr, M_CAMXPT); 6218 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_0); 6219 xpt_schedule(periph, priority); 6220 return; 6221 } 6222 case PROBE_SERIAL_NUM_0: 6223 { 6224 struct ccb_scsiio *csio; 6225 struct scsi_vpd_supported_page_list *page_list; 6226 int length, serialnum_supported, i; 6227 6228 serialnum_supported = 0; 6229 csio = &done_ccb->csio; 6230 page_list = 6231 (struct scsi_vpd_supported_page_list *)csio->data_ptr; 6232 6233 if (page_list == NULL) { 6234 /* 6235 * Don't process the command as it was never sent 6236 */ 6237 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6238 && (page_list->length > 0)) { 6239 length = min(page_list->length, 6240 SVPD_SUPPORTED_PAGES_SIZE); 6241 for (i = 0; i < length; i++) { 6242 if (page_list->list[i] == 6243 SVPD_UNIT_SERIAL_NUMBER) { 6244 serialnum_supported = 1; 6245 break; 6246 } 6247 } 6248 } else if (cam_periph_error(done_ccb, 0, 6249 SF_RETRY_UA|SF_NO_PRINT, 6250 &softc->saved_ccb) == ERESTART) { 6251 return; 6252 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6253 /* Don't wedge the queue */ 6254 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6255 /*run_queue*/TRUE); 6256 } 6257 6258 if (page_list != NULL) 6259 kfree(page_list, M_DEVBUF); 6260 6261 if (serialnum_supported) { 6262 xpt_release_ccb(done_ccb); 6263 PROBE_SET_ACTION(softc, PROBE_SERIAL_NUM_1); 6264 xpt_schedule(periph, priority); 6265 return; 6266 } 6267 6268 csio->data_ptr = NULL; 6269 /* FALLTHROUGH */ 6270 } 6271 6272 case PROBE_SERIAL_NUM_1: 6273 { 6274 struct ccb_scsiio *csio; 6275 struct scsi_vpd_unit_serial_number *serial_buf; 6276 u_int32_t priority; 6277 int changed; 6278 int have_serialnum; 6279 6280 changed = 1; 6281 have_serialnum = 0; 6282 csio = &done_ccb->csio; 6283 priority = done_ccb->ccb_h.pinfo.priority; 6284 serial_buf = 6285 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 6286 6287 /* Clean up from previous instance of this device */ 6288 if (path->device->serial_num != NULL) { 6289 kfree(path->device->serial_num, M_CAMXPT); 6290 path->device->serial_num = NULL; 6291 path->device->serial_num_len = 0; 6292 } 6293 6294 if (serial_buf == NULL) { 6295 /* 6296 * Don't process the command as it was never sent 6297 */ 6298 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6299 && (serial_buf->length > 0)) { 6300 6301 have_serialnum = 1; 6302 path->device->serial_num = 6303 kmalloc((serial_buf->length + 1), 6304 M_CAMXPT, M_INTWAIT); 6305 bcopy(serial_buf->serial_num, 6306 path->device->serial_num, 6307 serial_buf->length); 6308 path->device->serial_num_len = serial_buf->length; 6309 path->device->serial_num[serial_buf->length] = '\0'; 6310 } else if (cam_periph_error(done_ccb, 0, 6311 SF_RETRY_UA|SF_NO_PRINT, 6312 &softc->saved_ccb) == ERESTART) { 6313 return; 6314 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6315 /* Don't wedge the queue */ 6316 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6317 /*run_queue*/TRUE); 6318 } 6319 6320 /* 6321 * Let's see if we have seen this device before. 6322 */ 6323 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 6324 MD5_CTX context; 6325 u_int8_t digest[16]; 6326 6327 MD5Init(&context); 6328 6329 MD5Update(&context, 6330 (unsigned char *)&path->device->inq_data, 6331 sizeof(struct scsi_inquiry_data)); 6332 6333 if (have_serialnum) 6334 MD5Update(&context, serial_buf->serial_num, 6335 serial_buf->length); 6336 6337 MD5Final(digest, &context); 6338 if (bcmp(softc->digest, digest, 16) == 0) 6339 changed = 0; 6340 6341 /* 6342 * XXX Do we need to do a TUR in order to ensure 6343 * that the device really hasn't changed??? 6344 */ 6345 if ((changed != 0) 6346 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 6347 xpt_async(AC_LOST_DEVICE, path, NULL); 6348 } 6349 if (serial_buf != NULL) 6350 kfree(serial_buf, M_CAMXPT); 6351 6352 if (changed != 0) { 6353 /* 6354 * Now that we have all the necessary 6355 * information to safely perform transfer 6356 * negotiations... Controllers don't perform 6357 * any negotiation or tagged queuing until 6358 * after the first XPT_SET_TRAN_SETTINGS ccb is 6359 * received. So, on a new device, just retrieve 6360 * the user settings, and set them as the current 6361 * settings to set the device up. 6362 */ 6363 proberequestdefaultnegotiation(periph); 6364 xpt_release_ccb(done_ccb); 6365 6366 /* 6367 * Perform a TUR to allow the controller to 6368 * perform any necessary transfer negotiation. 6369 */ 6370 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION); 6371 xpt_schedule(periph, priority); 6372 return; 6373 } 6374 xpt_release_ccb(done_ccb); 6375 break; 6376 } 6377 case PROBE_TUR_FOR_NEGOTIATION: 6378 case PROBE_DV_EXIT: 6379 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6380 /* Don't wedge the queue */ 6381 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6382 /*run_queue*/TRUE); 6383 } 6384 6385 xpt_reference_device(path->device); 6386 /* 6387 * Do Domain Validation for lun 0 on devices that claim 6388 * to support Synchronous Transfer modes. 6389 */ 6390 if (softc->action == PROBE_TUR_FOR_NEGOTIATION 6391 && done_ccb->ccb_h.target_lun == 0 6392 && (path->device->inq_data.flags & SID_Sync) != 0 6393 && (path->device->flags & CAM_DEV_IN_DV) == 0) { 6394 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6395 ("Begin Domain Validation\n")); 6396 path->device->flags |= CAM_DEV_IN_DV; 6397 xpt_release_ccb(done_ccb); 6398 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV1); 6399 xpt_schedule(periph, priority); 6400 return; 6401 } 6402 if (softc->action == PROBE_DV_EXIT) { 6403 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6404 ("Leave Domain Validation\n")); 6405 } 6406 path->device->flags &= 6407 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6408 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6409 /* Inform the XPT that a new device has been found */ 6410 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6411 xpt_action(done_ccb); 6412 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6413 done_ccb); 6414 } 6415 xpt_release_ccb(done_ccb); 6416 break; 6417 case PROBE_INQUIRY_BASIC_DV1: 6418 case PROBE_INQUIRY_BASIC_DV2: 6419 { 6420 struct scsi_inquiry_data *nbuf; 6421 struct ccb_scsiio *csio; 6422 6423 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6424 /* Don't wedge the queue */ 6425 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6426 /*run_queue*/TRUE); 6427 } 6428 csio = &done_ccb->csio; 6429 nbuf = (struct scsi_inquiry_data *)csio->data_ptr; 6430 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { 6431 xpt_print(path, 6432 "inquiry data fails comparison at DV%d step\n", 6433 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); 6434 if (proberequestbackoff(periph, path->device)) { 6435 path->device->flags &= ~CAM_DEV_IN_DV; 6436 PROBE_SET_ACTION(softc, PROBE_TUR_FOR_NEGOTIATION); 6437 } else { 6438 /* give up */ 6439 PROBE_SET_ACTION(softc, PROBE_DV_EXIT); 6440 } 6441 kfree(nbuf, M_CAMXPT); 6442 xpt_release_ccb(done_ccb); 6443 xpt_schedule(periph, priority); 6444 return; 6445 } 6446 kfree(nbuf, M_CAMXPT); 6447 if (softc->action == PROBE_INQUIRY_BASIC_DV1) { 6448 PROBE_SET_ACTION(softc, PROBE_INQUIRY_BASIC_DV2); 6449 xpt_release_ccb(done_ccb); 6450 xpt_schedule(periph, priority); 6451 return; 6452 } 6453 if (softc->action == PROBE_DV_EXIT) { 6454 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6455 ("Leave Domain Validation Successfully\n")); 6456 } 6457 path->device->flags &= 6458 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6459 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6460 /* Inform the XPT that a new device has been found */ 6461 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6462 xpt_action(done_ccb); 6463 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6464 done_ccb); 6465 } 6466 xpt_release_ccb(done_ccb); 6467 break; 6468 } 6469 case PROBE_INVALID: 6470 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_INFO, 6471 ("probedone: invalid action state\n")); 6472 default: 6473 break; 6474 } 6475 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 6476 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 6477 done_ccb->ccb_h.status = CAM_REQ_CMP; 6478 xpt_done(done_ccb); 6479 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 6480 cam_periph_invalidate(periph); 6481 cam_periph_release(periph); 6482 } else { 6483 probeschedule(periph); 6484 } 6485 } 6486 6487 static void 6488 probecleanup(struct cam_periph *periph) 6489 { 6490 kfree(periph->softc, M_CAMXPT); 6491 } 6492 6493 static void 6494 xpt_find_quirk(struct cam_ed *device) 6495 { 6496 caddr_t match; 6497 6498 match = cam_quirkmatch((caddr_t)&device->inq_data, 6499 (caddr_t)xpt_quirk_table, 6500 NELEM(xpt_quirk_table), 6501 sizeof(*xpt_quirk_table), scsi_inquiry_match); 6502 6503 if (match == NULL) 6504 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 6505 6506 device->quirk = (struct xpt_quirk_entry *)match; 6507 } 6508 6509 static int 6510 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) 6511 { 6512 int error, lbool; 6513 6514 lbool = cam_srch_hi; 6515 error = sysctl_handle_int(oidp, &lbool, 0, req); 6516 if (error != 0 || req->newptr == NULL) 6517 return (error); 6518 if (lbool == 0 || lbool == 1) { 6519 cam_srch_hi = lbool; 6520 return (0); 6521 } else { 6522 return (EINVAL); 6523 } 6524 } 6525 6526 static void 6527 xpt_devise_transport(struct cam_path *path) 6528 { 6529 struct ccb_pathinq cpi; 6530 struct ccb_trans_settings cts; 6531 struct scsi_inquiry_data *inq_buf; 6532 6533 /* Get transport information from the SIM */ 6534 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 6535 cpi.ccb_h.func_code = XPT_PATH_INQ; 6536 xpt_action((union ccb *)&cpi); 6537 6538 inq_buf = NULL; 6539 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 6540 inq_buf = &path->device->inq_data; 6541 path->device->protocol = PROTO_SCSI; 6542 path->device->protocol_version = 6543 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 6544 path->device->transport = cpi.transport; 6545 path->device->transport_version = cpi.transport_version; 6546 6547 /* 6548 * Any device not using SPI3 features should 6549 * be considered SPI2 or lower. 6550 */ 6551 if (inq_buf != NULL) { 6552 if (path->device->transport == XPORT_SPI 6553 && (inq_buf->spi3data & SID_SPI_MASK) == 0 6554 && path->device->transport_version > 2) 6555 path->device->transport_version = 2; 6556 } else { 6557 struct cam_ed* otherdev; 6558 6559 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 6560 otherdev != NULL; 6561 otherdev = TAILQ_NEXT(otherdev, links)) { 6562 if (otherdev != path->device) 6563 break; 6564 } 6565 6566 if (otherdev != NULL) { 6567 /* 6568 * Initially assume the same versioning as 6569 * prior luns for this target. 6570 */ 6571 path->device->protocol_version = 6572 otherdev->protocol_version; 6573 path->device->transport_version = 6574 otherdev->transport_version; 6575 } else { 6576 /* Until we know better, opt for safty */ 6577 path->device->protocol_version = 2; 6578 if (path->device->transport == XPORT_SPI) 6579 path->device->transport_version = 2; 6580 else 6581 path->device->transport_version = 0; 6582 } 6583 } 6584 6585 /* 6586 * XXX 6587 * For a device compliant with SPC-2 we should be able 6588 * to determine the transport version supported by 6589 * scrutinizing the version descriptors in the 6590 * inquiry buffer. 6591 */ 6592 6593 /* Tell the controller what we think */ 6594 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 6595 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6596 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6597 cts.transport = path->device->transport; 6598 cts.transport_version = path->device->transport_version; 6599 cts.protocol = path->device->protocol; 6600 cts.protocol_version = path->device->protocol_version; 6601 cts.proto_specific.valid = 0; 6602 cts.xport_specific.valid = 0; 6603 xpt_action((union ccb *)&cts); 6604 } 6605 6606 static void 6607 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6608 int async_update) 6609 { 6610 struct ccb_pathinq cpi; 6611 struct ccb_trans_settings cur_cts; 6612 struct ccb_trans_settings_scsi *scsi; 6613 struct ccb_trans_settings_scsi *cur_scsi; 6614 struct cam_sim *sim; 6615 struct scsi_inquiry_data *inq_data; 6616 6617 if (device == NULL) { 6618 cts->ccb_h.status = CAM_PATH_INVALID; 6619 xpt_done((union ccb *)cts); 6620 return; 6621 } 6622 6623 if (cts->protocol == PROTO_UNKNOWN 6624 || cts->protocol == PROTO_UNSPECIFIED) { 6625 cts->protocol = device->protocol; 6626 cts->protocol_version = device->protocol_version; 6627 } 6628 6629 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 6630 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 6631 cts->protocol_version = device->protocol_version; 6632 6633 if (cts->protocol != device->protocol) { 6634 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", 6635 cts->protocol, device->protocol); 6636 cts->protocol = device->protocol; 6637 } 6638 6639 if (cts->protocol_version > device->protocol_version) { 6640 if (bootverbose) { 6641 xpt_print(cts->ccb_h.path, "Down reving Protocol " 6642 "Version from %d to %d?\n", cts->protocol_version, 6643 device->protocol_version); 6644 } 6645 cts->protocol_version = device->protocol_version; 6646 } 6647 6648 if (cts->transport == XPORT_UNKNOWN 6649 || cts->transport == XPORT_UNSPECIFIED) { 6650 cts->transport = device->transport; 6651 cts->transport_version = device->transport_version; 6652 } 6653 6654 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6655 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6656 cts->transport_version = device->transport_version; 6657 6658 if (cts->transport != device->transport) { 6659 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", 6660 cts->transport, device->transport); 6661 cts->transport = device->transport; 6662 } 6663 6664 if (cts->transport_version > device->transport_version) { 6665 if (bootverbose) { 6666 xpt_print(cts->ccb_h.path, "Down reving Transport " 6667 "Version from %d to %d?\n", cts->transport_version, 6668 device->transport_version); 6669 } 6670 cts->transport_version = device->transport_version; 6671 } 6672 6673 sim = cts->ccb_h.path->bus->sim; 6674 6675 /* 6676 * Nothing more of interest to do unless 6677 * this is a device connected via the 6678 * SCSI protocol. 6679 */ 6680 if (cts->protocol != PROTO_SCSI) { 6681 if (async_update == FALSE) 6682 (*(sim->sim_action))(sim, (union ccb *)cts); 6683 return; 6684 } 6685 6686 inq_data = &device->inq_data; 6687 scsi = &cts->proto_specific.scsi; 6688 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6689 cpi.ccb_h.func_code = XPT_PATH_INQ; 6690 xpt_action((union ccb *)&cpi); 6691 6692 /* SCSI specific sanity checking */ 6693 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6694 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 6695 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6696 || (device->quirk->mintags == 0)) { 6697 /* 6698 * Can't tag on hardware that doesn't support tags, 6699 * doesn't have it enabled, or has broken tag support. 6700 */ 6701 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6702 } 6703 6704 if (async_update == FALSE) { 6705 /* 6706 * Perform sanity checking against what the 6707 * controller and device can do. 6708 */ 6709 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6710 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6711 cur_cts.type = cts->type; 6712 xpt_action((union ccb *)&cur_cts); 6713 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6714 return; 6715 } 6716 cur_scsi = &cur_cts.proto_specific.scsi; 6717 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6718 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6719 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6720 } 6721 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6722 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6723 } 6724 6725 /* SPI specific sanity checking */ 6726 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6727 u_int spi3caps; 6728 struct ccb_trans_settings_spi *spi; 6729 struct ccb_trans_settings_spi *cur_spi; 6730 6731 spi = &cts->xport_specific.spi; 6732 6733 cur_spi = &cur_cts.xport_specific.spi; 6734 6735 /* Fill in any gaps in what the user gave us */ 6736 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6737 spi->sync_period = cur_spi->sync_period; 6738 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6739 spi->sync_period = 0; 6740 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6741 spi->sync_offset = cur_spi->sync_offset; 6742 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6743 spi->sync_offset = 0; 6744 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6745 spi->ppr_options = cur_spi->ppr_options; 6746 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6747 spi->ppr_options = 0; 6748 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6749 spi->bus_width = cur_spi->bus_width; 6750 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6751 spi->bus_width = 0; 6752 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6753 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6754 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6755 } 6756 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6757 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6758 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6759 && (inq_data->flags & SID_Sync) == 0 6760 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6761 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)) { 6762 /* Force async */ 6763 spi->sync_period = 0; 6764 spi->sync_offset = 0; 6765 } 6766 6767 switch (spi->bus_width) { 6768 case MSG_EXT_WDTR_BUS_32_BIT: 6769 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6770 || (inq_data->flags & SID_WBus32) != 0 6771 || cts->type == CTS_TYPE_USER_SETTINGS) 6772 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6773 break; 6774 /* Fall Through to 16-bit */ 6775 case MSG_EXT_WDTR_BUS_16_BIT: 6776 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6777 || (inq_data->flags & SID_WBus16) != 0 6778 || cts->type == CTS_TYPE_USER_SETTINGS) 6779 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6780 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6781 break; 6782 } 6783 /* Fall Through to 8-bit */ 6784 default: /* New bus width?? */ 6785 case MSG_EXT_WDTR_BUS_8_BIT: 6786 /* All targets can do this */ 6787 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6788 break; 6789 } 6790 6791 spi3caps = cpi.xport_specific.spi.ppr_options; 6792 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6793 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6794 spi3caps &= inq_data->spi3data; 6795 6796 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6797 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6798 6799 if ((spi3caps & SID_SPI_IUS) == 0) 6800 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6801 6802 if ((spi3caps & SID_SPI_QAS) == 0) 6803 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6804 6805 /* No SPI Transfer settings are allowed unless we are wide */ 6806 if (spi->bus_width == 0) 6807 spi->ppr_options = 0; 6808 6809 if ((spi->valid & CTS_SPI_VALID_DISC) 6810 && ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0)) { 6811 /* 6812 * Can't tag queue without disconnection. 6813 */ 6814 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6815 scsi->valid |= CTS_SCSI_VALID_TQ; 6816 } 6817 6818 /* 6819 * If we are currently performing tagged transactions to 6820 * this device and want to change its negotiation parameters, 6821 * go non-tagged for a bit to give the controller a chance to 6822 * negotiate unhampered by tag messages. 6823 */ 6824 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6825 && (device->inq_flags & SID_CmdQue) != 0 6826 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6827 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6828 CTS_SPI_VALID_SYNC_OFFSET| 6829 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6830 xpt_toggle_tags(cts->ccb_h.path); 6831 } 6832 6833 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6834 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6835 int device_tagenb; 6836 6837 /* 6838 * If we are transitioning from tags to no-tags or 6839 * vice-versa, we need to carefully freeze and restart 6840 * the queue so that we don't overlap tagged and non-tagged 6841 * commands. We also temporarily stop tags if there is 6842 * a change in transfer negotiation settings to allow 6843 * "tag-less" negotiation. 6844 */ 6845 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6846 || (device->inq_flags & SID_CmdQue) != 0) 6847 device_tagenb = TRUE; 6848 else 6849 device_tagenb = FALSE; 6850 6851 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6852 && device_tagenb == FALSE) 6853 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6854 && device_tagenb == TRUE)) { 6855 6856 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6857 /* 6858 * Delay change to use tags until after a 6859 * few commands have gone to this device so 6860 * the controller has time to perform transfer 6861 * negotiations without tagged messages getting 6862 * in the way. 6863 */ 6864 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6865 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6866 } else { 6867 struct ccb_relsim crs; 6868 6869 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6870 device->inq_flags &= ~SID_CmdQue; 6871 xpt_dev_ccbq_resize(cts->ccb_h.path, 6872 sim->max_dev_openings); 6873 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6874 device->tag_delay_count = 0; 6875 6876 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6877 /*priority*/1); 6878 crs.ccb_h.func_code = XPT_REL_SIMQ; 6879 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6880 crs.openings 6881 = crs.release_timeout 6882 = crs.qfrozen_cnt 6883 = 0; 6884 xpt_action((union ccb *)&crs); 6885 } 6886 } 6887 } 6888 if (async_update == FALSE) 6889 (*(sim->sim_action))(sim, (union ccb *)cts); 6890 } 6891 6892 static void 6893 xpt_toggle_tags(struct cam_path *path) 6894 { 6895 struct cam_ed *dev; 6896 6897 /* 6898 * Give controllers a chance to renegotiate 6899 * before starting tag operations. We 6900 * "toggle" tagged queuing off then on 6901 * which causes the tag enable command delay 6902 * counter to come into effect. 6903 */ 6904 dev = path->device; 6905 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6906 || ((dev->inq_flags & SID_CmdQue) != 0 6907 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6908 struct ccb_trans_settings cts; 6909 6910 xpt_setup_ccb(&cts.ccb_h, path, 1); 6911 cts.protocol = PROTO_SCSI; 6912 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6913 cts.transport = XPORT_UNSPECIFIED; 6914 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6915 cts.proto_specific.scsi.flags = 0; 6916 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6917 xpt_set_transfer_settings(&cts, path->device, 6918 /*async_update*/TRUE); 6919 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6920 xpt_set_transfer_settings(&cts, path->device, 6921 /*async_update*/TRUE); 6922 } 6923 } 6924 6925 static void 6926 xpt_start_tags(struct cam_path *path) 6927 { 6928 struct ccb_relsim crs; 6929 struct cam_ed *device; 6930 struct cam_sim *sim; 6931 int newopenings; 6932 6933 device = path->device; 6934 sim = path->bus->sim; 6935 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6936 xpt_freeze_devq(path, /*count*/1); 6937 device->inq_flags |= SID_CmdQue; 6938 if (device->tag_saved_openings != 0) 6939 newopenings = device->tag_saved_openings; 6940 else 6941 newopenings = min(device->quirk->maxtags, 6942 sim->max_tagged_dev_openings); 6943 xpt_dev_ccbq_resize(path, newopenings); 6944 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6945 crs.ccb_h.func_code = XPT_REL_SIMQ; 6946 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6947 crs.openings 6948 = crs.release_timeout 6949 = crs.qfrozen_cnt 6950 = 0; 6951 xpt_action((union ccb *)&crs); 6952 } 6953 6954 static int busses_to_config; 6955 static int busses_to_reset; 6956 6957 static int 6958 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6959 { 6960 sim_lock_assert_owned(bus->sim->lock); 6961 6962 if (bus->counted_to_config == 0 && bus->path_id != CAM_XPT_PATH_ID) { 6963 struct cam_path path; 6964 struct ccb_pathinq cpi; 6965 int can_negotiate; 6966 6967 if (bootverbose) { 6968 kprintf("CAM: Configuring bus:"); 6969 if (bus->sim) { 6970 kprintf(" %s%d\n", 6971 bus->sim->sim_name, 6972 bus->sim->unit_number); 6973 } else { 6974 kprintf(" (unknown)\n"); 6975 } 6976 } 6977 atomic_add_int(&busses_to_config, 1); 6978 bus->counted_to_config = 1; 6979 xpt_compile_path(&path, NULL, bus->path_id, 6980 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6981 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6982 cpi.ccb_h.func_code = XPT_PATH_INQ; 6983 xpt_action((union ccb *)&cpi); 6984 can_negotiate = cpi.hba_inquiry; 6985 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6986 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 && can_negotiate) 6987 busses_to_reset++; 6988 xpt_release_path(&path); 6989 } else 6990 if (bus->counted_to_config == 0 && bus->path_id == CAM_XPT_PATH_ID) { 6991 /* this is our dummy periph/bus */ 6992 atomic_add_int(&busses_to_config, 1); 6993 bus->counted_to_config = 1; 6994 } 6995 6996 return(1); 6997 } 6998 6999 static int 7000 xptconfigfunc(struct cam_eb *bus, void *arg) 7001 { 7002 struct cam_path *path; 7003 union ccb *work_ccb; 7004 7005 sim_lock_assert_owned(bus->sim->lock); 7006 7007 if (bus->path_id != CAM_XPT_PATH_ID) { 7008 cam_status status; 7009 int can_negotiate; 7010 7011 work_ccb = xpt_alloc_ccb(); 7012 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 7013 CAM_TARGET_WILDCARD, 7014 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 7015 kprintf("xptconfigfunc: xpt_create_path failed with " 7016 "status %#x for bus %d\n", status, bus->path_id); 7017 kprintf("xptconfigfunc: halting bus configuration\n"); 7018 xpt_free_ccb(work_ccb); 7019 xpt_uncount_bus(bus); 7020 return(0); 7021 } 7022 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 7023 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 7024 xpt_action(work_ccb); 7025 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 7026 kprintf("xptconfigfunc: CPI failed on bus %d " 7027 "with status %d\n", bus->path_id, 7028 work_ccb->ccb_h.status); 7029 xpt_finishconfig(xpt_periph, work_ccb); 7030 return(1); 7031 } 7032 7033 can_negotiate = work_ccb->cpi.hba_inquiry; 7034 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 7035 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 7036 && (can_negotiate != 0)) { 7037 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 7038 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 7039 work_ccb->ccb_h.cbfcnp = NULL; 7040 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 7041 ("Resetting Bus\n")); 7042 xpt_action(work_ccb); 7043 xpt_finishconfig(xpt_periph, work_ccb); 7044 } else { 7045 /* Act as though we performed a successful BUS RESET */ 7046 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 7047 xpt_finishconfig(xpt_periph, work_ccb); 7048 } 7049 } else { 7050 xpt_uncount_bus(bus); 7051 } 7052 7053 return(1); 7054 } 7055 7056 /* 7057 * Now that interrupts are enabled, go find our devices. 7058 * 7059 * This hook function is called once by run_interrupt_driven_config_hooks(). 7060 * XPT is expected to disestablish its hook when done. 7061 */ 7062 static void 7063 xpt_config(void *arg) 7064 { 7065 7066 #ifdef CAMDEBUG 7067 /* Setup debugging flags and path */ 7068 #ifdef CAM_DEBUG_FLAGS 7069 cam_dflags = CAM_DEBUG_FLAGS; 7070 #else /* !CAM_DEBUG_FLAGS */ 7071 cam_dflags = CAM_DEBUG_NONE; 7072 #endif /* CAM_DEBUG_FLAGS */ 7073 #ifdef CAM_DEBUG_BUS 7074 if (cam_dflags != CAM_DEBUG_NONE) { 7075 /* 7076 * Locking is specifically omitted here. No SIMs have 7077 * registered yet, so xpt_create_path will only be searching 7078 * empty lists of targets and devices. 7079 */ 7080 if (xpt_create_path(&cam_dpath, xpt_periph, 7081 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 7082 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 7083 kprintf("xpt_config: xpt_create_path() failed for debug" 7084 " target %d:%d:%d, debugging disabled\n", 7085 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 7086 cam_dflags = CAM_DEBUG_NONE; 7087 } 7088 } else { 7089 cam_dpath = NULL; 7090 } 7091 #else /* !CAM_DEBUG_BUS */ 7092 cam_dpath = NULL; 7093 #endif /* CAM_DEBUG_BUS */ 7094 #endif /* CAMDEBUG */ 7095 7096 /* 7097 * Scan all installed busses. This will also add a count 7098 * for our dummy placeholder (xpt_periph). 7099 */ 7100 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 7101 7102 kprintf("CAM: Configuring %d busses\n", busses_to_config - 1); 7103 if (busses_to_reset > 0 && scsi_delay >= 2000) { 7104 kprintf("Waiting %d seconds for SCSI " 7105 "devices to settle\n", 7106 scsi_delay/1000); 7107 } 7108 xpt_for_all_busses(xptconfigfunc, NULL); 7109 } 7110 7111 /* 7112 * If the given device only has one peripheral attached to it, and if that 7113 * peripheral is the passthrough driver, announce it. This insures that the 7114 * user sees some sort of announcement for every peripheral in their system. 7115 */ 7116 static int 7117 xptpassannouncefunc(struct cam_ed *device, void *arg) 7118 { 7119 struct cam_periph *periph; 7120 int i; 7121 7122 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 7123 periph = SLIST_NEXT(periph, periph_links), i++); 7124 7125 periph = SLIST_FIRST(&device->periphs); 7126 if ((i == 1) 7127 && (strncmp(periph->periph_name, "pass", 4) == 0)) 7128 xpt_announce_periph(periph, NULL); 7129 7130 return(1); 7131 } 7132 7133 static void 7134 xpt_finishconfig_task(void *context, int pending) 7135 { 7136 struct periph_driver **p_drv; 7137 int i; 7138 7139 kprintf("CAM: finished configuring all busses\n"); 7140 7141 if (busses_to_config == 0) { 7142 /* Register all the peripheral drivers */ 7143 /* XXX This will have to change when we have loadable modules */ 7144 p_drv = periph_drivers; 7145 for (i = 0; p_drv[i] != NULL; i++) { 7146 (*p_drv[i]->init)(); 7147 } 7148 7149 /* 7150 * Check for devices with no "standard" peripheral driver 7151 * attached. For any devices like that, announce the 7152 * passthrough driver so the user will see something. 7153 */ 7154 xpt_for_all_devices(xptpassannouncefunc, NULL); 7155 7156 /* Release our hook so that the boot can continue. */ 7157 config_intrhook_disestablish(xsoftc.xpt_config_hook); 7158 kfree(xsoftc.xpt_config_hook, M_CAMXPT); 7159 xsoftc.xpt_config_hook = NULL; 7160 } 7161 kfree(context, M_CAMXPT); 7162 } 7163 7164 static void 7165 xpt_uncount_bus (struct cam_eb *bus) 7166 { 7167 struct xpt_task *task; 7168 7169 if (bus->counted_to_config) { 7170 bus->counted_to_config = 0; 7171 if (atomic_fetchadd_int(&busses_to_config, -1) == 1) { 7172 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 7173 M_INTWAIT | M_ZERO); 7174 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 7175 taskqueue_enqueue(taskqueue_thread[mycpuid], 7176 &task->task); 7177 } 7178 } 7179 } 7180 7181 static void 7182 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 7183 { 7184 struct cam_path *path; 7185 7186 path = done_ccb->ccb_h.path; 7187 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_finishconfig\n")); 7188 7189 switch(done_ccb->ccb_h.func_code) { 7190 case XPT_RESET_BUS: 7191 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 7192 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 7193 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 7194 done_ccb->crcn.flags = 0; 7195 xpt_action(done_ccb); 7196 return; 7197 } 7198 /* FALLTHROUGH */ 7199 case XPT_SCAN_BUS: 7200 default: 7201 if (bootverbose) { 7202 kprintf("CAM: Finished configuring bus:"); 7203 if (path->bus->sim) { 7204 kprintf(" %s%d\n", 7205 path->bus->sim->sim_name, 7206 path->bus->sim->unit_number); 7207 } else { 7208 kprintf(" (unknown)\n"); 7209 } 7210 } 7211 xpt_uncount_bus(path->bus); 7212 xpt_free_path(path); 7213 xpt_free_ccb(done_ccb); 7214 break; 7215 } 7216 } 7217 7218 cam_status 7219 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 7220 struct cam_path *path) 7221 { 7222 struct ccb_setasync csa; 7223 cam_status status; 7224 int xptpath = 0; 7225 7226 if (path == NULL) { 7227 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7228 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 7229 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 7230 if (status != CAM_REQ_CMP) { 7231 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7232 return (status); 7233 } 7234 xptpath = 1; 7235 } 7236 7237 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 7238 csa.ccb_h.func_code = XPT_SASYNC_CB; 7239 csa.event_enable = event; 7240 csa.callback = cbfunc; 7241 csa.callback_arg = cbarg; 7242 xpt_action((union ccb *)&csa); 7243 status = csa.ccb_h.status; 7244 if (xptpath) { 7245 xpt_free_path(path); 7246 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7247 } 7248 return (status); 7249 } 7250 7251 static void 7252 xptaction(struct cam_sim *sim, union ccb *work_ccb) 7253 { 7254 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 7255 7256 switch (work_ccb->ccb_h.func_code) { 7257 /* Common cases first */ 7258 case XPT_PATH_INQ: /* Path routing inquiry */ 7259 { 7260 struct ccb_pathinq *cpi; 7261 7262 cpi = &work_ccb->cpi; 7263 cpi->version_num = 1; /* XXX??? */ 7264 cpi->hba_inquiry = 0; 7265 cpi->target_sprt = 0; 7266 cpi->hba_misc = 0; 7267 cpi->hba_eng_cnt = 0; 7268 cpi->max_target = 0; 7269 cpi->max_lun = 0; 7270 cpi->initiator_id = 0; 7271 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 7272 strncpy(cpi->hba_vid, "", HBA_IDLEN); 7273 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 7274 cpi->unit_number = sim->unit_number; 7275 cpi->bus_id = sim->bus_id; 7276 cpi->base_transfer_speed = 0; 7277 cpi->protocol = PROTO_UNSPECIFIED; 7278 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 7279 cpi->transport = XPORT_UNSPECIFIED; 7280 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 7281 cpi->ccb_h.status = CAM_REQ_CMP; 7282 xpt_done(work_ccb); 7283 break; 7284 } 7285 default: 7286 work_ccb->ccb_h.status = CAM_REQ_INVALID; 7287 xpt_done(work_ccb); 7288 break; 7289 } 7290 } 7291 7292 /* 7293 * The xpt as a "controller" has no interrupt sources, so polling 7294 * is a no-op. 7295 */ 7296 static void 7297 xptpoll(struct cam_sim *sim) 7298 { 7299 } 7300 7301 void 7302 xpt_lock_buses(void) 7303 { 7304 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 7305 } 7306 7307 void 7308 xpt_unlock_buses(void) 7309 { 7310 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 7311 } 7312 7313 7314 /* 7315 * Should only be called by the machine interrupt dispatch routines, 7316 * so put these prototypes here instead of in the header. 7317 */ 7318 7319 static void 7320 swi_cambio(void *arg, void *frame) 7321 { 7322 camisr(NULL); 7323 } 7324 7325 static void 7326 camisr(void *dummy) 7327 { 7328 cam_simq_t queue; 7329 struct cam_sim *sim; 7330 7331 spin_lock(&cam_simq_spin); 7332 TAILQ_INIT(&queue); 7333 TAILQ_CONCAT(&queue, &cam_simq, links); 7334 spin_unlock(&cam_simq_spin); 7335 7336 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 7337 TAILQ_REMOVE(&queue, sim, links); 7338 CAM_SIM_LOCK(sim); 7339 sim->flags &= ~CAM_SIM_ON_DONEQ; 7340 camisr_runqueue(sim); 7341 CAM_SIM_UNLOCK(sim); 7342 } 7343 } 7344 7345 static void 7346 camisr_runqueue(struct cam_sim *sim) 7347 { 7348 struct ccb_hdr *ccb_h; 7349 int runq; 7350 7351 spin_lock(&sim->sim_spin); 7352 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { 7353 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); 7354 spin_unlock(&sim->sim_spin); 7355 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 7356 7357 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 7358 ("camisr\n")); 7359 7360 runq = FALSE; 7361 7362 if (ccb_h->flags & CAM_HIGH_POWER) { 7363 struct highpowerlist *hphead; 7364 union ccb *send_ccb; 7365 7366 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7367 hphead = &xsoftc.highpowerq; 7368 7369 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 7370 7371 /* 7372 * Increment the count since this command is done. 7373 */ 7374 xsoftc.num_highpower++; 7375 7376 /* 7377 * Any high powered commands queued up? 7378 */ 7379 if (send_ccb != NULL) { 7380 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 7381 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7382 7383 xpt_release_devq(send_ccb->ccb_h.path, 7384 /*count*/1, /*runqueue*/TRUE); 7385 } else 7386 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7387 } 7388 7389 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 7390 struct cam_ed *dev; 7391 7392 dev = ccb_h->path->device; 7393 7394 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 7395 7396 /* 7397 * devq may be NULL if this is cam_dead_sim 7398 */ 7399 if (ccb_h->path->bus->sim->devq) { 7400 ccb_h->path->bus->sim->devq->send_active--; 7401 ccb_h->path->bus->sim->devq->send_openings++; 7402 } 7403 7404 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 7405 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 7406 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 7407 && (dev->ccbq.dev_active == 0))) { 7408 7409 xpt_release_devq(ccb_h->path, /*count*/1, 7410 /*run_queue*/TRUE); 7411 } 7412 7413 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 7414 && (--dev->tag_delay_count == 0)) 7415 xpt_start_tags(ccb_h->path); 7416 7417 if ((dev->ccbq.queue.entries > 0) 7418 && (dev->qfrozen_cnt == 0) 7419 && (device_is_send_queued(dev) == 0)) { 7420 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 7421 dev); 7422 } 7423 } 7424 7425 if (ccb_h->status & CAM_RELEASE_SIMQ) { 7426 xpt_release_simq(ccb_h->path->bus->sim, 7427 /*run_queue*/TRUE); 7428 ccb_h->status &= ~CAM_RELEASE_SIMQ; 7429 runq = FALSE; 7430 } 7431 7432 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 7433 && (ccb_h->status & CAM_DEV_QFRZN)) { 7434 xpt_release_devq(ccb_h->path, /*count*/1, 7435 /*run_queue*/TRUE); 7436 ccb_h->status &= ~CAM_DEV_QFRZN; 7437 } else if (runq) { 7438 xpt_run_dev_sendq(ccb_h->path->bus); 7439 } 7440 7441 /* Call the peripheral driver's callback */ 7442 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 7443 spin_lock(&sim->sim_spin); 7444 } 7445 spin_unlock(&sim->sim_spin); 7446 } 7447 7448 /* 7449 * The dead_sim isn't completely hooked into CAM, we have to make sure 7450 * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() 7451 * doesn't block. 7452 */ 7453 static void 7454 dead_sim_action(struct cam_sim *sim, union ccb *ccb) 7455 { 7456 7457 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 7458 xpt_done(ccb); 7459 camisr_runqueue(sim); 7460 } 7461 7462 static void 7463 dead_sim_poll(struct cam_sim *sim) 7464 { 7465 } 7466