1 /* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ 30 * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.66 2008/06/29 19:15:34 dillon Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/md5.h> 42 #include <sys/devicestat.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/taskqueue.h> 46 #include <sys/bus.h> 47 #include <sys/thread.h> 48 #include <sys/lock.h> 49 #include <sys/spinlock.h> 50 #include <sys/thread2.h> 51 #include <sys/spinlock2.h> 52 53 #include <machine/clock.h> 54 #include <machine/stdarg.h> 55 56 #include "cam.h" 57 #include "cam_ccb.h" 58 #include "cam_periph.h" 59 #include "cam_sim.h" 60 #include "cam_xpt.h" 61 #include "cam_xpt_sim.h" 62 #include "cam_xpt_periph.h" 63 #include "cam_debug.h" 64 65 #include "scsi/scsi_all.h" 66 #include "scsi/scsi_message.h" 67 #include "scsi/scsi_pass.h" 68 #include <sys/kthread.h> 69 #include "opt_cam.h" 70 71 /* Datastructures internal to the xpt layer */ 72 MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); 73 74 /* Object for defering XPT actions to a taskqueue */ 75 struct xpt_task { 76 struct task task; 77 void *data1; 78 uintptr_t data2; 79 }; 80 81 /* 82 * Definition of an async handler callback block. These are used to add 83 * SIMs and peripherals to the async callback lists. 84 */ 85 struct async_node { 86 SLIST_ENTRY(async_node) links; 87 u_int32_t event_enable; /* Async Event enables */ 88 void (*callback)(void *arg, u_int32_t code, 89 struct cam_path *path, void *args); 90 void *callback_arg; 91 }; 92 93 SLIST_HEAD(async_list, async_node); 94 SLIST_HEAD(periph_list, cam_periph); 95 96 /* 97 * This is the maximum number of high powered commands (e.g. start unit) 98 * that can be outstanding at a particular time. 99 */ 100 #ifndef CAM_MAX_HIGHPOWER 101 #define CAM_MAX_HIGHPOWER 4 102 #endif 103 104 /* 105 * Structure for queueing a device in a run queue. 106 * There is one run queue for allocating new ccbs, 107 * and another for sending ccbs to the controller. 108 */ 109 struct cam_ed_qinfo { 110 cam_pinfo pinfo; 111 struct cam_ed *device; 112 }; 113 114 /* 115 * The CAM EDT (Existing Device Table) contains the device information for 116 * all devices for all busses in the system. The table contains a 117 * cam_ed structure for each device on the bus. 118 */ 119 struct cam_ed { 120 TAILQ_ENTRY(cam_ed) links; 121 struct cam_ed_qinfo alloc_ccb_entry; 122 struct cam_ed_qinfo send_ccb_entry; 123 struct cam_et *target; 124 struct cam_sim *sim; 125 lun_id_t lun_id; 126 struct camq drvq; /* 127 * Queue of type drivers wanting to do 128 * work on this device. 129 */ 130 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 131 struct async_list asyncs; /* Async callback info for this B/T/L */ 132 struct periph_list periphs; /* All attached devices */ 133 u_int generation; /* Generation number */ 134 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 135 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 136 /* Storage for the inquiry data */ 137 cam_proto protocol; 138 u_int protocol_version; 139 cam_xport transport; 140 u_int transport_version; 141 struct scsi_inquiry_data inq_data; 142 u_int8_t inq_flags; /* 143 * Current settings for inquiry flags. 144 * This allows us to override settings 145 * like disconnection and tagged 146 * queuing for a device. 147 */ 148 u_int8_t queue_flags; /* Queue flags from the control page */ 149 u_int8_t serial_num_len; 150 u_int8_t *serial_num; 151 u_int32_t qfrozen_cnt; 152 u_int32_t flags; 153 #define CAM_DEV_UNCONFIGURED 0x01 154 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 155 #define CAM_DEV_REL_ON_COMPLETE 0x04 156 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 157 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 158 #define CAM_DEV_TAG_AFTER_COUNT 0x20 159 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 160 #define CAM_DEV_IN_DV 0x80 161 #define CAM_DEV_DV_HIT_BOTTOM 0x100 162 u_int32_t tag_delay_count; 163 #define CAM_TAG_DELAY_COUNT 5 164 u_int32_t tag_saved_openings; 165 u_int32_t refcount; 166 struct callout callout; 167 }; 168 169 /* 170 * Each target is represented by an ET (Existing Target). These 171 * entries are created when a target is successfully probed with an 172 * identify, and removed when a device fails to respond after a number 173 * of retries, or a bus rescan finds the device missing. 174 */ 175 struct cam_et { 176 TAILQ_HEAD(, cam_ed) ed_entries; 177 TAILQ_ENTRY(cam_et) links; 178 struct cam_eb *bus; 179 target_id_t target_id; 180 u_int32_t refcount; 181 u_int generation; 182 struct timeval last_reset; /* uptime of last reset */ 183 }; 184 185 /* 186 * Each bus is represented by an EB (Existing Bus). These entries 187 * are created by calls to xpt_bus_register and deleted by calls to 188 * xpt_bus_deregister. 189 */ 190 struct cam_eb { 191 TAILQ_HEAD(, cam_et) et_entries; 192 TAILQ_ENTRY(cam_eb) links; 193 path_id_t path_id; 194 struct cam_sim *sim; 195 struct timeval last_reset; /* uptime of last reset */ 196 u_int32_t flags; 197 #define CAM_EB_RUNQ_SCHEDULED 0x01 198 u_int32_t refcount; 199 u_int generation; 200 }; 201 202 struct cam_path { 203 struct cam_periph *periph; 204 struct cam_eb *bus; 205 struct cam_et *target; 206 struct cam_ed *device; 207 }; 208 209 struct xpt_quirk_entry { 210 struct scsi_inquiry_pattern inq_pat; 211 u_int8_t quirks; 212 #define CAM_QUIRK_NOLUNS 0x01 213 #define CAM_QUIRK_NOSERIAL 0x02 214 #define CAM_QUIRK_HILUNS 0x04 215 #define CAM_QUIRK_NOHILUNS 0x08 216 u_int mintags; 217 u_int maxtags; 218 }; 219 220 static int cam_srch_hi = 0; 221 TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi); 222 static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS); 223 SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0, 224 sysctl_cam_search_luns, "I", 225 "allow search above LUN 7 for SCSI3 and greater devices"); 226 227 #define CAM_SCSI2_MAXLUN 8 228 /* 229 * If we're not quirked to search <= the first 8 luns 230 * and we are either quirked to search above lun 8, 231 * or we're > SCSI-2 and we've enabled hilun searching, 232 * or we're > SCSI-2 and the last lun was a success, 233 * we can look for luns above lun 8. 234 */ 235 #define CAN_SRCH_HI_SPARSE(dv) \ 236 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 237 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 238 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi))) 239 240 #define CAN_SRCH_HI_DENSE(dv) \ 241 (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ 242 && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ 243 || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))) 244 245 typedef enum { 246 XPT_FLAG_OPEN = 0x01 247 } xpt_flags; 248 249 struct xpt_softc { 250 xpt_flags flags; 251 u_int32_t xpt_generation; 252 253 /* number of high powered commands that can go through right now */ 254 STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 255 int num_highpower; 256 257 /* queue for handling async rescan requests. */ 258 TAILQ_HEAD(, ccb_hdr) ccb_scanq; 259 260 /* Registered busses */ 261 TAILQ_HEAD(,cam_eb) xpt_busses; 262 u_int bus_generation; 263 264 struct intr_config_hook *xpt_config_hook; 265 266 struct lock xpt_topo_lock; 267 struct lock xpt_lock; 268 }; 269 270 static const char quantum[] = "QUANTUM"; 271 static const char sony[] = "SONY"; 272 static const char west_digital[] = "WDIGTL"; 273 static const char samsung[] = "SAMSUNG"; 274 static const char seagate[] = "SEAGATE"; 275 static const char microp[] = "MICROP"; 276 277 static struct xpt_quirk_entry xpt_quirk_table[] = 278 { 279 { 280 /* Reports QUEUE FULL for temporary resource shortages */ 281 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 282 /*quirks*/0, /*mintags*/24, /*maxtags*/32 283 }, 284 { 285 /* Reports QUEUE FULL for temporary resource shortages */ 286 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 287 /*quirks*/0, /*mintags*/24, /*maxtags*/32 288 }, 289 { 290 /* Reports QUEUE FULL for temporary resource shortages */ 291 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 292 /*quirks*/0, /*mintags*/24, /*maxtags*/32 293 }, 294 { 295 /* Broken tagged queuing drive */ 296 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 297 /*quirks*/0, /*mintags*/0, /*maxtags*/0 298 }, 299 { 300 /* Broken tagged queuing drive */ 301 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 302 /*quirks*/0, /*mintags*/0, /*maxtags*/0 303 }, 304 { 305 /* Broken tagged queuing drive */ 306 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 307 /*quirks*/0, /*mintags*/0, /*maxtags*/0 308 }, 309 { 310 /* 311 * Unfortunately, the Quantum Atlas III has the same 312 * problem as the Atlas II drives above. 313 * Reported by: "Johan Granlund" <johan@granlund.nu> 314 * 315 * For future reference, the drive with the problem was: 316 * QUANTUM QM39100TD-SW N1B0 317 * 318 * It's possible that Quantum will fix the problem in later 319 * firmware revisions. If that happens, the quirk entry 320 * will need to be made specific to the firmware revisions 321 * with the problem. 322 * 323 */ 324 /* Reports QUEUE FULL for temporary resource shortages */ 325 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 326 /*quirks*/0, /*mintags*/24, /*maxtags*/32 327 }, 328 { 329 /* 330 * 18 Gig Atlas III, same problem as the 9G version. 331 * Reported by: Andre Albsmeier 332 * <andre.albsmeier@mchp.siemens.de> 333 * 334 * For future reference, the drive with the problem was: 335 * QUANTUM QM318000TD-S N491 336 */ 337 /* Reports QUEUE FULL for temporary resource shortages */ 338 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 339 /*quirks*/0, /*mintags*/24, /*maxtags*/32 340 }, 341 { 342 /* 343 * Broken tagged queuing drive 344 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 345 * and: Martin Renters <martin@tdc.on.ca> 346 */ 347 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 348 /*quirks*/0, /*mintags*/0, /*maxtags*/0 349 }, 350 /* 351 * The Seagate Medalist Pro drives have very poor write 352 * performance with anything more than 2 tags. 353 * 354 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 355 * Drive: <SEAGATE ST36530N 1444> 356 * 357 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 358 * Drive: <SEAGATE ST34520W 1281> 359 * 360 * No one has actually reported that the 9G version 361 * (ST39140*) of the Medalist Pro has the same problem, but 362 * we're assuming that it does because the 4G and 6.5G 363 * versions of the drive are broken. 364 */ 365 { 366 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 367 /*quirks*/0, /*mintags*/2, /*maxtags*/2 368 }, 369 { 370 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 371 /*quirks*/0, /*mintags*/2, /*maxtags*/2 372 }, 373 { 374 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 375 /*quirks*/0, /*mintags*/2, /*maxtags*/2 376 }, 377 { 378 /* 379 * Slow when tagged queueing is enabled. Write performance 380 * steadily drops off with more and more concurrent 381 * transactions. Best sequential write performance with 382 * tagged queueing turned off and write caching turned on. 383 * 384 * PR: kern/10398 385 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 386 * Drive: DCAS-34330 w/ "S65A" firmware. 387 * 388 * The drive with the problem had the "S65A" firmware 389 * revision, and has also been reported (by Stephen J. 390 * Roznowski <sjr@home.net>) for a drive with the "S61A" 391 * firmware revision. 392 * 393 * Although no one has reported problems with the 2 gig 394 * version of the DCAS drive, the assumption is that it 395 * has the same problems as the 4 gig version. Therefore 396 * this quirk entries disables tagged queueing for all 397 * DCAS drives. 398 */ 399 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 400 /*quirks*/0, /*mintags*/0, /*maxtags*/0 401 }, 402 { 403 /* Broken tagged queuing drive */ 404 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 405 /*quirks*/0, /*mintags*/0, /*maxtags*/0 406 }, 407 { 408 /* Broken tagged queuing drive */ 409 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 410 /*quirks*/0, /*mintags*/0, /*maxtags*/0 411 }, 412 { 413 /* This does not support other than LUN 0 */ 414 { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" }, 415 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 416 }, 417 { 418 /* 419 * Broken tagged queuing drive. 420 * Submitted by: 421 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 422 * in PR kern/9535 423 */ 424 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 425 /*quirks*/0, /*mintags*/0, /*maxtags*/0 426 }, 427 { 428 /* 429 * Slow when tagged queueing is enabled. (1.5MB/sec versus 430 * 8MB/sec.) 431 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 432 * Best performance with these drives is achieved with 433 * tagged queueing turned off, and write caching turned on. 434 */ 435 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 436 /*quirks*/0, /*mintags*/0, /*maxtags*/0 437 }, 438 { 439 /* 440 * Slow when tagged queueing is enabled. (1.5MB/sec versus 441 * 8MB/sec.) 442 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 443 * Best performance with these drives is achieved with 444 * tagged queueing turned off, and write caching turned on. 445 */ 446 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 447 /*quirks*/0, /*mintags*/0, /*maxtags*/0 448 }, 449 { 450 /* 451 * Doesn't handle queue full condition correctly, 452 * so we need to limit maxtags to what the device 453 * can handle instead of determining this automatically. 454 */ 455 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 456 /*quirks*/0, /*mintags*/2, /*maxtags*/32 457 }, 458 { 459 /* Really only one LUN */ 460 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 461 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 462 }, 463 { 464 /* I can't believe we need a quirk for DPT volumes. */ 465 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 466 CAM_QUIRK_NOLUNS, 467 /*mintags*/0, /*maxtags*/255 468 }, 469 { 470 /* 471 * Many Sony CDROM drives don't like multi-LUN probing. 472 */ 473 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 474 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 475 }, 476 { 477 /* 478 * This drive doesn't like multiple LUN probing. 479 * Submitted by: Parag Patel <parag@cgt.com> 480 */ 481 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 482 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 483 }, 484 { 485 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 486 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 487 }, 488 { 489 /* 490 * The 8200 doesn't like multi-lun probing, and probably 491 * don't like serial number requests either. 492 */ 493 { 494 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 495 "EXB-8200*", "*" 496 }, 497 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 498 }, 499 { 500 /* 501 * Let's try the same as above, but for a drive that says 502 * it's an IPL-6860 but is actually an EXB 8200. 503 */ 504 { 505 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 506 "IPL-6860*", "*" 507 }, 508 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 509 }, 510 { 511 /* 512 * These Hitachi drives don't like multi-lun probing. 513 * The PR submitter has a DK319H, but says that the Linux 514 * kernel has a similar work-around for the DK312 and DK314, 515 * so all DK31* drives are quirked here. 516 * PR: misc/18793 517 * Submitted by: Paul Haddad <paul@pth.com> 518 */ 519 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 520 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 521 }, 522 { 523 /* 524 * The Hitachi CJ series with J8A8 firmware apparantly has 525 * problems with tagged commands. 526 * PR: 23536 527 * Reported by: amagai@nue.org 528 */ 529 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" }, 530 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 531 }, 532 { 533 /* 534 * These are the large storage arrays. 535 * Submitted by: William Carrel <william.carrel@infospace.com> 536 */ 537 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" }, 538 CAM_QUIRK_HILUNS, 2, 1024 539 }, 540 { 541 /* 542 * This old revision of the TDC3600 is also SCSI-1, and 543 * hangs upon serial number probing. 544 */ 545 { 546 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 547 " TDC 3600", "U07:" 548 }, 549 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 550 }, 551 { 552 /* 553 * Would repond to all LUNs if asked for. 554 */ 555 { 556 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 557 "CP150", "*" 558 }, 559 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 560 }, 561 { 562 /* 563 * Would repond to all LUNs if asked for. 564 */ 565 { 566 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 567 "96X2*", "*" 568 }, 569 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 570 }, 571 { 572 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 573 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 574 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 575 }, 576 { 577 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 578 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 579 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 580 }, 581 { 582 /* TeraSolutions special settings for TRC-22 RAID */ 583 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 584 /*quirks*/0, /*mintags*/55, /*maxtags*/255 585 }, 586 { 587 /* Veritas Storage Appliance */ 588 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 589 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 590 }, 591 { 592 /* 593 * Would respond to all LUNs. Device type and removable 594 * flag are jumper-selectable. 595 */ 596 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 597 "Tahiti 1", "*" 598 }, 599 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 600 }, 601 { 602 /* EasyRAID E5A aka. areca ARC-6010 */ 603 { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" }, 604 CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255 605 }, 606 { 607 { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" }, 608 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 609 }, 610 { 611 /* Default tagged queuing parameters for all devices */ 612 { 613 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 614 /*vendor*/"*", /*product*/"*", /*revision*/"*" 615 }, 616 /*quirks*/0, /*mintags*/2, /*maxtags*/255 617 }, 618 }; 619 620 static const int xpt_quirk_table_size = 621 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 622 623 typedef enum { 624 DM_RET_COPY = 0x01, 625 DM_RET_FLAG_MASK = 0x0f, 626 DM_RET_NONE = 0x00, 627 DM_RET_STOP = 0x10, 628 DM_RET_DESCEND = 0x20, 629 DM_RET_ERROR = 0x30, 630 DM_RET_ACTION_MASK = 0xf0 631 } dev_match_ret; 632 633 typedef enum { 634 XPT_DEPTH_BUS, 635 XPT_DEPTH_TARGET, 636 XPT_DEPTH_DEVICE, 637 XPT_DEPTH_PERIPH 638 } xpt_traverse_depth; 639 640 struct xpt_traverse_config { 641 xpt_traverse_depth depth; 642 void *tr_func; 643 void *tr_arg; 644 }; 645 646 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 647 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 648 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 649 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 650 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 651 652 /* Transport layer configuration information */ 653 static struct xpt_softc xsoftc; 654 655 /* Queues for our software interrupt handler */ 656 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 657 typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; 658 static cam_simq_t cam_simq; 659 static struct spinlock cam_simq_spin; 660 661 struct cam_periph *xpt_periph; 662 663 static periph_init_t xpt_periph_init; 664 665 static periph_init_t probe_periph_init; 666 667 static struct periph_driver xpt_driver = 668 { 669 xpt_periph_init, "xpt", 670 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 671 }; 672 673 static struct periph_driver probe_driver = 674 { 675 probe_periph_init, "probe", 676 TAILQ_HEAD_INITIALIZER(probe_driver.units) 677 }; 678 679 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 680 PERIPHDRIVER_DECLARE(probe, probe_driver); 681 682 #define XPT_CDEV_MAJOR 104 683 684 static d_open_t xptopen; 685 static d_close_t xptclose; 686 static d_ioctl_t xptioctl; 687 688 static struct dev_ops xpt_ops = { 689 { "xpt", XPT_CDEV_MAJOR, 0 }, 690 .d_open = xptopen, 691 .d_close = xptclose, 692 .d_ioctl = xptioctl 693 }; 694 695 static void dead_sim_action(struct cam_sim *sim, union ccb *ccb); 696 static void dead_sim_poll(struct cam_sim *sim); 697 698 /* Dummy SIM that is used when the real one has gone. */ 699 static struct cam_sim cam_dead_sim = { 700 .sim_action = dead_sim_action, 701 .sim_poll = dead_sim_poll, 702 .sim_name = "dead_sim", 703 }; 704 705 #define SIM_DEAD(sim) ((sim) == &cam_dead_sim) 706 707 /* Storage for debugging datastructures */ 708 #ifdef CAMDEBUG 709 struct cam_path *cam_dpath; 710 u_int32_t cam_dflags; 711 u_int32_t cam_debug_delay; 712 #endif 713 714 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 715 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 716 #endif 717 718 /* 719 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 720 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 721 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 722 */ 723 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 724 || defined(CAM_DEBUG_LUN) 725 #ifdef CAMDEBUG 726 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 727 || !defined(CAM_DEBUG_LUN) 728 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 729 and CAM_DEBUG_LUN" 730 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 731 #else /* !CAMDEBUG */ 732 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 733 #endif /* CAMDEBUG */ 734 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 735 736 /* Our boot-time initialization hook */ 737 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 738 739 static moduledata_t cam_moduledata = { 740 "cam", 741 cam_module_event_handler, 742 NULL 743 }; 744 745 static int xpt_init(void *); 746 747 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 748 MODULE_VERSION(cam, 1); 749 750 751 static cam_status xpt_compile_path(struct cam_path *new_path, 752 struct cam_periph *perph, 753 path_id_t path_id, 754 target_id_t target_id, 755 lun_id_t lun_id); 756 757 static void xpt_release_path(struct cam_path *path); 758 759 static void xpt_async_bcast(struct async_list *async_head, 760 u_int32_t async_code, 761 struct cam_path *path, 762 void *async_arg); 763 static void xpt_dev_async(u_int32_t async_code, 764 struct cam_eb *bus, 765 struct cam_et *target, 766 struct cam_ed *device, 767 void *async_arg); 768 static path_id_t xptnextfreepathid(void); 769 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 770 static union ccb *xpt_get_ccb(struct cam_ed *device); 771 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 772 u_int32_t new_priority); 773 static void xpt_run_dev_allocq(struct cam_eb *bus); 774 static void xpt_run_dev_sendq(struct cam_eb *bus); 775 static timeout_t xpt_release_devq_timeout; 776 static void xpt_release_bus(struct cam_eb *bus); 777 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 778 int run_queue); 779 static struct cam_et* 780 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 781 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 782 static struct cam_ed* 783 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 784 lun_id_t lun_id); 785 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 786 struct cam_ed *device); 787 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 788 static struct cam_eb* 789 xpt_find_bus(path_id_t path_id); 790 static struct cam_et* 791 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 792 static struct cam_ed* 793 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 794 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 795 static void xpt_scan_lun(struct cam_periph *periph, 796 struct cam_path *path, cam_flags flags, 797 union ccb *ccb); 798 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 799 static xpt_busfunc_t xptconfigbuscountfunc; 800 static xpt_busfunc_t xptconfigfunc; 801 static void xpt_config(void *arg); 802 static xpt_devicefunc_t xptpassannouncefunc; 803 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 804 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 805 static void xptpoll(struct cam_sim *sim); 806 static inthand2_t swi_cambio; 807 static void camisr(void *); 808 static void camisr_runqueue(struct cam_sim *); 809 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 810 u_int num_patterns, struct cam_eb *bus); 811 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 812 u_int num_patterns, 813 struct cam_ed *device); 814 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 815 u_int num_patterns, 816 struct cam_periph *periph); 817 static xpt_busfunc_t xptedtbusfunc; 818 static xpt_targetfunc_t xptedttargetfunc; 819 static xpt_devicefunc_t xptedtdevicefunc; 820 static xpt_periphfunc_t xptedtperiphfunc; 821 static xpt_pdrvfunc_t xptplistpdrvfunc; 822 static xpt_periphfunc_t xptplistperiphfunc; 823 static int xptedtmatch(struct ccb_dev_match *cdm); 824 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 825 static int xptbustraverse(struct cam_eb *start_bus, 826 xpt_busfunc_t *tr_func, void *arg); 827 static int xpttargettraverse(struct cam_eb *bus, 828 struct cam_et *start_target, 829 xpt_targetfunc_t *tr_func, void *arg); 830 static int xptdevicetraverse(struct cam_et *target, 831 struct cam_ed *start_device, 832 xpt_devicefunc_t *tr_func, void *arg); 833 static int xptperiphtraverse(struct cam_ed *device, 834 struct cam_periph *start_periph, 835 xpt_periphfunc_t *tr_func, void *arg); 836 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 837 xpt_pdrvfunc_t *tr_func, void *arg); 838 static int xptpdperiphtraverse(struct periph_driver **pdrv, 839 struct cam_periph *start_periph, 840 xpt_periphfunc_t *tr_func, 841 void *arg); 842 static xpt_busfunc_t xptdefbusfunc; 843 static xpt_targetfunc_t xptdeftargetfunc; 844 static xpt_devicefunc_t xptdefdevicefunc; 845 static xpt_periphfunc_t xptdefperiphfunc; 846 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 847 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 848 void *arg); 849 static xpt_devicefunc_t xptsetasyncfunc; 850 static xpt_busfunc_t xptsetasyncbusfunc; 851 static cam_status xptregister(struct cam_periph *periph, 852 void *arg); 853 static cam_status proberegister(struct cam_periph *periph, 854 void *arg); 855 static void probeschedule(struct cam_periph *probe_periph); 856 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 857 static void proberequestdefaultnegotiation(struct cam_periph *periph); 858 static int proberequestbackoff(struct cam_periph *periph, 859 struct cam_ed *device); 860 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 861 static void probecleanup(struct cam_periph *periph); 862 static void xpt_find_quirk(struct cam_ed *device); 863 static void xpt_devise_transport(struct cam_path *path); 864 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 865 struct cam_ed *device, 866 int async_update); 867 static void xpt_toggle_tags(struct cam_path *path); 868 static void xpt_start_tags(struct cam_path *path); 869 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 870 struct cam_ed *dev); 871 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 872 struct cam_ed *dev); 873 static __inline int periph_is_queued(struct cam_periph *periph); 874 static __inline int device_is_alloc_queued(struct cam_ed *device); 875 static __inline int device_is_send_queued(struct cam_ed *device); 876 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 877 878 static __inline int 879 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 880 { 881 int retval; 882 883 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 884 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 885 cam_ccbq_resize(&dev->ccbq, 886 dev->ccbq.dev_openings 887 + dev->ccbq.dev_active); 888 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 889 } 890 /* 891 * The priority of a device waiting for CCB resources 892 * is that of the the highest priority peripheral driver 893 * enqueued. 894 */ 895 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 896 &dev->alloc_ccb_entry.pinfo, 897 CAMQ_GET_HEAD(&dev->drvq)->priority); 898 } else { 899 retval = 0; 900 } 901 902 return (retval); 903 } 904 905 static __inline int 906 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 907 { 908 int retval; 909 910 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 911 /* 912 * The priority of a device waiting for controller 913 * resources is that of the the highest priority CCB 914 * enqueued. 915 */ 916 retval = 917 xpt_schedule_dev(&bus->sim->devq->send_queue, 918 &dev->send_ccb_entry.pinfo, 919 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 920 } else { 921 retval = 0; 922 } 923 return (retval); 924 } 925 926 static __inline int 927 periph_is_queued(struct cam_periph *periph) 928 { 929 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 930 } 931 932 static __inline int 933 device_is_alloc_queued(struct cam_ed *device) 934 { 935 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 936 } 937 938 static __inline int 939 device_is_send_queued(struct cam_ed *device) 940 { 941 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 942 } 943 944 static __inline int 945 dev_allocq_is_runnable(struct cam_devq *devq) 946 { 947 /* 948 * Have work to do. 949 * Have space to do more work. 950 * Allowed to do work. 951 */ 952 return ((devq->alloc_queue.qfrozen_cnt == 0) 953 && (devq->alloc_queue.entries > 0) 954 && (devq->alloc_openings > 0)); 955 } 956 957 static void 958 xpt_periph_init(void) 959 { 960 dev_ops_add(&xpt_ops, 0, 0); 961 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 962 } 963 964 static void 965 probe_periph_init(void) 966 { 967 } 968 969 970 static void 971 xptdone(struct cam_periph *periph, union ccb *done_ccb) 972 { 973 /* Caller will release the CCB */ 974 wakeup(&done_ccb->ccb_h.cbfcnp); 975 } 976 977 static int 978 xptopen(struct dev_open_args *ap) 979 { 980 cdev_t dev = ap->a_head.a_dev; 981 982 /* 983 * Only allow read-write access. 984 */ 985 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) 986 return(EPERM); 987 988 /* 989 * We don't allow nonblocking access. 990 */ 991 if ((ap->a_oflags & O_NONBLOCK) != 0) { 992 kprintf("%s: can't do nonblocking access\n", devtoname(dev)); 993 return(ENODEV); 994 } 995 996 /* Mark ourselves open */ 997 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 998 xsoftc.flags |= XPT_FLAG_OPEN; 999 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1000 1001 return(0); 1002 } 1003 1004 static int 1005 xptclose(struct dev_close_args *ap) 1006 { 1007 1008 /* Mark ourselves closed */ 1009 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 1010 xsoftc.flags &= ~XPT_FLAG_OPEN; 1011 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1012 1013 return(0); 1014 } 1015 1016 /* 1017 * Don't automatically grab the xpt softc lock here even though this is going 1018 * through the xpt device. The xpt device is really just a back door for 1019 * accessing other devices and SIMs, so the right thing to do is to grab 1020 * the appropriate SIM lock once the bus/SIM is located. 1021 */ 1022 static int 1023 xptioctl(struct dev_ioctl_args *ap) 1024 { 1025 int error; 1026 1027 error = 0; 1028 1029 switch(ap->a_cmd) { 1030 /* 1031 * For the transport layer CAMIOCOMMAND ioctl, we really only want 1032 * to accept CCB types that don't quite make sense to send through a 1033 * passthrough driver. 1034 */ 1035 case CAMIOCOMMAND: { 1036 union ccb *ccb; 1037 union ccb *inccb; 1038 struct cam_eb *bus; 1039 1040 inccb = (union ccb *)ap->a_data; 1041 1042 bus = xpt_find_bus(inccb->ccb_h.path_id); 1043 if (bus == NULL) { 1044 error = EINVAL; 1045 break; 1046 } 1047 1048 switch(inccb->ccb_h.func_code) { 1049 case XPT_SCAN_BUS: 1050 case XPT_RESET_BUS: 1051 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 1052 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 1053 error = EINVAL; 1054 break; 1055 } 1056 /* FALLTHROUGH */ 1057 case XPT_PATH_INQ: 1058 case XPT_ENG_INQ: 1059 case XPT_SCAN_LUN: 1060 1061 ccb = xpt_alloc_ccb(); 1062 1063 CAM_SIM_LOCK(bus->sim); 1064 1065 /* 1066 * Create a path using the bus, target, and lun the 1067 * user passed in. 1068 */ 1069 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1070 inccb->ccb_h.path_id, 1071 inccb->ccb_h.target_id, 1072 inccb->ccb_h.target_lun) != 1073 CAM_REQ_CMP){ 1074 error = EINVAL; 1075 CAM_SIM_UNLOCK(bus->sim); 1076 xpt_free_ccb(ccb); 1077 break; 1078 } 1079 /* Ensure all of our fields are correct */ 1080 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1081 inccb->ccb_h.pinfo.priority); 1082 xpt_merge_ccb(ccb, inccb); 1083 ccb->ccb_h.cbfcnp = xptdone; 1084 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1085 bcopy(ccb, inccb, sizeof(union ccb)); 1086 xpt_free_path(ccb->ccb_h.path); 1087 xpt_free_ccb(ccb); 1088 CAM_SIM_UNLOCK(bus->sim); 1089 break; 1090 1091 case XPT_DEBUG: { 1092 union ccb ccb; 1093 1094 /* 1095 * This is an immediate CCB, so it's okay to 1096 * allocate it on the stack. 1097 */ 1098 1099 CAM_SIM_LOCK(bus->sim); 1100 1101 /* 1102 * Create a path using the bus, target, and lun the 1103 * user passed in. 1104 */ 1105 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1106 inccb->ccb_h.path_id, 1107 inccb->ccb_h.target_id, 1108 inccb->ccb_h.target_lun) != 1109 CAM_REQ_CMP){ 1110 error = EINVAL; 1111 CAM_SIM_UNLOCK(bus->sim); 1112 break; 1113 } 1114 /* Ensure all of our fields are correct */ 1115 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1116 inccb->ccb_h.pinfo.priority); 1117 xpt_merge_ccb(&ccb, inccb); 1118 ccb.ccb_h.cbfcnp = xptdone; 1119 xpt_action(&ccb); 1120 CAM_SIM_UNLOCK(bus->sim); 1121 bcopy(&ccb, inccb, sizeof(union ccb)); 1122 xpt_free_path(ccb.ccb_h.path); 1123 break; 1124 1125 } 1126 case XPT_DEV_MATCH: { 1127 struct cam_periph_map_info mapinfo; 1128 struct cam_path *old_path; 1129 1130 /* 1131 * We can't deal with physical addresses for this 1132 * type of transaction. 1133 */ 1134 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1135 error = EINVAL; 1136 break; 1137 } 1138 1139 /* 1140 * Save this in case the caller had it set to 1141 * something in particular. 1142 */ 1143 old_path = inccb->ccb_h.path; 1144 1145 /* 1146 * We really don't need a path for the matching 1147 * code. The path is needed because of the 1148 * debugging statements in xpt_action(). They 1149 * assume that the CCB has a valid path. 1150 */ 1151 inccb->ccb_h.path = xpt_periph->path; 1152 1153 bzero(&mapinfo, sizeof(mapinfo)); 1154 1155 /* 1156 * Map the pattern and match buffers into kernel 1157 * virtual address space. 1158 */ 1159 error = cam_periph_mapmem(inccb, &mapinfo); 1160 1161 if (error) { 1162 inccb->ccb_h.path = old_path; 1163 break; 1164 } 1165 1166 /* 1167 * This is an immediate CCB, we can send it on directly. 1168 */ 1169 xpt_action(inccb); 1170 1171 /* 1172 * Map the buffers back into user space. 1173 */ 1174 cam_periph_unmapmem(inccb, &mapinfo); 1175 1176 inccb->ccb_h.path = old_path; 1177 1178 error = 0; 1179 break; 1180 } 1181 default: 1182 error = ENOTSUP; 1183 break; 1184 } 1185 xpt_release_bus(bus); 1186 break; 1187 } 1188 /* 1189 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1190 * with the periphal driver name and unit name filled in. The other 1191 * fields don't really matter as input. The passthrough driver name 1192 * ("pass"), and unit number are passed back in the ccb. The current 1193 * device generation number, and the index into the device peripheral 1194 * driver list, and the status are also passed back. Note that 1195 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1196 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1197 * (or rather should be) impossible for the device peripheral driver 1198 * list to change since we look at the whole thing in one pass, and 1199 * we do it with lock protection. 1200 * 1201 */ 1202 case CAMGETPASSTHRU: { 1203 union ccb *ccb; 1204 struct cam_periph *periph; 1205 struct periph_driver **p_drv; 1206 char *name; 1207 u_int unit; 1208 u_int cur_generation; 1209 int base_periph_found; 1210 int splbreaknum; 1211 1212 ccb = (union ccb *)ap->a_data; 1213 unit = ccb->cgdl.unit_number; 1214 name = ccb->cgdl.periph_name; 1215 /* 1216 * Every 100 devices, we want to drop our lock protection to 1217 * give the software interrupt handler a chance to run. 1218 * Most systems won't run into this check, but this should 1219 * avoid starvation in the software interrupt handler in 1220 * large systems. 1221 */ 1222 splbreaknum = 100; 1223 1224 ccb = (union ccb *)ap->a_data; 1225 1226 base_periph_found = 0; 1227 1228 /* 1229 * Sanity check -- make sure we don't get a null peripheral 1230 * driver name. 1231 */ 1232 if (*ccb->cgdl.periph_name == '\0') { 1233 error = EINVAL; 1234 break; 1235 } 1236 1237 /* Keep the list from changing while we traverse it */ 1238 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1239 ptstartover: 1240 cur_generation = xsoftc.xpt_generation; 1241 1242 /* first find our driver in the list of drivers */ 1243 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 1244 if (strcmp((*p_drv)->driver_name, name) == 0) 1245 break; 1246 } 1247 1248 if (*p_drv == NULL) { 1249 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1250 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1251 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1252 *ccb->cgdl.periph_name = '\0'; 1253 ccb->cgdl.unit_number = 0; 1254 error = ENOENT; 1255 break; 1256 } 1257 1258 /* 1259 * Run through every peripheral instance of this driver 1260 * and check to see whether it matches the unit passed 1261 * in by the user. If it does, get out of the loops and 1262 * find the passthrough driver associated with that 1263 * peripheral driver. 1264 */ 1265 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 1266 1267 if (periph->unit_number == unit) { 1268 break; 1269 } else if (--splbreaknum == 0) { 1270 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1271 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1272 splbreaknum = 100; 1273 if (cur_generation != xsoftc.xpt_generation) 1274 goto ptstartover; 1275 } 1276 } 1277 /* 1278 * If we found the peripheral driver that the user passed 1279 * in, go through all of the peripheral drivers for that 1280 * particular device and look for a passthrough driver. 1281 */ 1282 if (periph != NULL) { 1283 struct cam_ed *device; 1284 int i; 1285 1286 base_periph_found = 1; 1287 device = periph->path->device; 1288 for (i = 0, periph = SLIST_FIRST(&device->periphs); 1289 periph != NULL; 1290 periph = SLIST_NEXT(periph, periph_links), i++) { 1291 /* 1292 * Check to see whether we have a 1293 * passthrough device or not. 1294 */ 1295 if (strcmp(periph->periph_name, "pass") == 0) { 1296 /* 1297 * Fill in the getdevlist fields. 1298 */ 1299 strcpy(ccb->cgdl.periph_name, 1300 periph->periph_name); 1301 ccb->cgdl.unit_number = 1302 periph->unit_number; 1303 if (SLIST_NEXT(periph, periph_links)) 1304 ccb->cgdl.status = 1305 CAM_GDEVLIST_MORE_DEVS; 1306 else 1307 ccb->cgdl.status = 1308 CAM_GDEVLIST_LAST_DEVICE; 1309 ccb->cgdl.generation = 1310 device->generation; 1311 ccb->cgdl.index = i; 1312 /* 1313 * Fill in some CCB header fields 1314 * that the user may want. 1315 */ 1316 ccb->ccb_h.path_id = 1317 periph->path->bus->path_id; 1318 ccb->ccb_h.target_id = 1319 periph->path->target->target_id; 1320 ccb->ccb_h.target_lun = 1321 periph->path->device->lun_id; 1322 ccb->ccb_h.status = CAM_REQ_CMP; 1323 break; 1324 } 1325 } 1326 } 1327 1328 /* 1329 * If the periph is null here, one of two things has 1330 * happened. The first possibility is that we couldn't 1331 * find the unit number of the particular peripheral driver 1332 * that the user is asking about. e.g. the user asks for 1333 * the passthrough driver for "da11". We find the list of 1334 * "da" peripherals all right, but there is no unit 11. 1335 * The other possibility is that we went through the list 1336 * of peripheral drivers attached to the device structure, 1337 * but didn't find one with the name "pass". Either way, 1338 * we return ENOENT, since we couldn't find something. 1339 */ 1340 if (periph == NULL) { 1341 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1342 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1343 *ccb->cgdl.periph_name = '\0'; 1344 ccb->cgdl.unit_number = 0; 1345 error = ENOENT; 1346 /* 1347 * It is unfortunate that this is even necessary, 1348 * but there are many, many clueless users out there. 1349 * If this is true, the user is looking for the 1350 * passthrough driver, but doesn't have one in his 1351 * kernel. 1352 */ 1353 if (base_periph_found == 1) { 1354 kprintf("xptioctl: pass driver is not in the " 1355 "kernel\n"); 1356 kprintf("xptioctl: put \"device pass\" in " 1357 "your kernel config file\n"); 1358 } 1359 } 1360 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1361 break; 1362 } 1363 default: 1364 error = ENOTTY; 1365 break; 1366 } 1367 1368 return(error); 1369 } 1370 1371 static int 1372 cam_module_event_handler(module_t mod, int what, void *arg) 1373 { 1374 int error; 1375 1376 switch (what) { 1377 case MOD_LOAD: 1378 if ((error = xpt_init(NULL)) != 0) 1379 return (error); 1380 break; 1381 case MOD_UNLOAD: 1382 return EBUSY; 1383 default: 1384 return EOPNOTSUPP; 1385 } 1386 1387 return 0; 1388 } 1389 1390 /* thread to handle bus rescans */ 1391 static void 1392 xpt_scanner_thread(void *dummy) 1393 { 1394 cam_isrq_t queue; 1395 union ccb *ccb; 1396 struct cam_sim *sim; 1397 1398 for (;;) { 1399 /* 1400 * Wait for a rescan request to come in. When it does, splice 1401 * it onto a queue from local storage so that the xpt lock 1402 * doesn't need to be held while the requests are being 1403 * processed. 1404 */ 1405 crit_enter(); 1406 tsleep_interlock(&xsoftc.ccb_scanq); 1407 xpt_unlock_buses(); 1408 tsleep(&xsoftc.ccb_scanq, 0, "ccb_scanq", 0); 1409 xpt_lock_buses(); 1410 crit_exit(); 1411 TAILQ_INIT(&queue); 1412 TAILQ_CONCAT(&queue, &xsoftc.ccb_scanq, sim_links.tqe); 1413 xpt_unlock_buses(); 1414 1415 while ((ccb = (union ccb *)TAILQ_FIRST(&queue)) != NULL) { 1416 TAILQ_REMOVE(&queue, &ccb->ccb_h, sim_links.tqe); 1417 1418 sim = ccb->ccb_h.path->bus->sim; 1419 CAM_SIM_LOCK(sim); 1420 1421 ccb->ccb_h.func_code = XPT_SCAN_BUS; 1422 ccb->ccb_h.cbfcnp = xptdone; 1423 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 5); 1424 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1425 xpt_free_path(ccb->ccb_h.path); 1426 xpt_free_ccb(ccb); 1427 CAM_SIM_UNLOCK(sim); 1428 } 1429 } 1430 } 1431 1432 void 1433 xpt_rescan(union ccb *ccb) 1434 { 1435 struct ccb_hdr *hdr; 1436 1437 /* 1438 * Don't make duplicate entries for the same paths. 1439 */ 1440 xpt_lock_buses(); 1441 TAILQ_FOREACH(hdr, &xsoftc.ccb_scanq, sim_links.tqe) { 1442 if (xpt_path_comp(hdr->path, ccb->ccb_h.path) == 0) { 1443 xpt_unlock_buses(); 1444 xpt_print(ccb->ccb_h.path, "rescan already queued\n"); 1445 xpt_free_path(ccb->ccb_h.path); 1446 xpt_free_ccb(ccb); 1447 return; 1448 } 1449 } 1450 TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); 1451 wakeup(&xsoftc.ccb_scanq); 1452 xpt_unlock_buses(); 1453 } 1454 1455 1456 /* Functions accessed by the peripheral drivers */ 1457 static int 1458 xpt_init(void *dummy) 1459 { 1460 struct cam_sim *xpt_sim; 1461 struct cam_path *path; 1462 struct cam_devq *devq; 1463 cam_status status; 1464 1465 TAILQ_INIT(&xsoftc.xpt_busses); 1466 TAILQ_INIT(&cam_simq); 1467 TAILQ_INIT(&xsoftc.ccb_scanq); 1468 STAILQ_INIT(&xsoftc.highpowerq); 1469 xsoftc.num_highpower = CAM_MAX_HIGHPOWER; 1470 1471 spin_init(&cam_simq_spin); 1472 lockinit(&xsoftc.xpt_lock, "XPT lock", 0, LK_CANRECURSE); 1473 lockinit(&xsoftc.xpt_topo_lock, "XPT topology lock", 0, LK_CANRECURSE); 1474 1475 /* 1476 * The xpt layer is, itself, the equivelent of a SIM. 1477 * Allow 16 ccbs in the ccb pool for it. This should 1478 * give decent parallelism when we probe busses and 1479 * perform other XPT functions. 1480 */ 1481 devq = cam_simq_alloc(16); 1482 xpt_sim = cam_sim_alloc(xptaction, 1483 xptpoll, 1484 "xpt", 1485 /*softc*/NULL, 1486 /*unit*/0, 1487 /*lock*/&xsoftc.xpt_lock, 1488 /*max_dev_transactions*/0, 1489 /*max_tagged_dev_transactions*/0, 1490 devq); 1491 cam_simq_release(devq); 1492 if (xpt_sim == NULL) 1493 return (ENOMEM); 1494 1495 xpt_sim->max_ccbs = 16; 1496 1497 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 1498 if ((status = xpt_bus_register(xpt_sim, /*bus #*/0)) != CAM_SUCCESS) { 1499 kprintf("xpt_init: xpt_bus_register failed with status %#x," 1500 " failing attach\n", status); 1501 return (EINVAL); 1502 } 1503 1504 /* 1505 * Looking at the XPT from the SIM layer, the XPT is 1506 * the equivelent of a peripheral driver. Allocate 1507 * a peripheral driver entry for us. 1508 */ 1509 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1510 CAM_TARGET_WILDCARD, 1511 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1512 kprintf("xpt_init: xpt_create_path failed with status %#x," 1513 " failing attach\n", status); 1514 return (EINVAL); 1515 } 1516 1517 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1518 path, NULL, 0, xpt_sim); 1519 xpt_free_path(path); 1520 1521 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 1522 1523 /* 1524 * Register a callback for when interrupts are enabled. 1525 */ 1526 xsoftc.xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1527 M_CAMXPT, M_INTWAIT | M_ZERO); 1528 xsoftc.xpt_config_hook->ich_func = xpt_config; 1529 xsoftc.xpt_config_hook->ich_desc = "xpt"; 1530 xsoftc.xpt_config_hook->ich_order = 1000; 1531 if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { 1532 kfree (xsoftc.xpt_config_hook, M_CAMXPT); 1533 kprintf("xpt_init: config_intrhook_establish failed " 1534 "- failing attach\n"); 1535 } 1536 1537 /* fire up rescan thread */ 1538 if (kthread_create(xpt_scanner_thread, NULL, NULL, "xpt_thrd")) { 1539 kprintf("xpt_init: failed to create rescan thread\n"); 1540 } 1541 /* Install our software interrupt handlers */ 1542 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL); 1543 1544 return (0); 1545 } 1546 1547 static cam_status 1548 xptregister(struct cam_periph *periph, void *arg) 1549 { 1550 struct cam_sim *xpt_sim; 1551 1552 if (periph == NULL) { 1553 kprintf("xptregister: periph was NULL!!\n"); 1554 return(CAM_REQ_CMP_ERR); 1555 } 1556 1557 xpt_sim = (struct cam_sim *)arg; 1558 xpt_sim->softc = periph; 1559 xpt_periph = periph; 1560 periph->softc = NULL; 1561 1562 return(CAM_REQ_CMP); 1563 } 1564 1565 int32_t 1566 xpt_add_periph(struct cam_periph *periph) 1567 { 1568 struct cam_ed *device; 1569 int32_t status; 1570 struct periph_list *periph_head; 1571 1572 sim_lock_assert_owned(periph->sim->lock); 1573 1574 device = periph->path->device; 1575 1576 periph_head = &device->periphs; 1577 1578 status = CAM_REQ_CMP; 1579 1580 if (device != NULL) { 1581 /* 1582 * Make room for this peripheral 1583 * so it will fit in the queue 1584 * when it's scheduled to run 1585 */ 1586 status = camq_resize(&device->drvq, 1587 device->drvq.array_size + 1); 1588 1589 device->generation++; 1590 1591 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1592 } 1593 1594 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1595 xsoftc.xpt_generation++; 1596 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1597 1598 return (status); 1599 } 1600 1601 void 1602 xpt_remove_periph(struct cam_periph *periph) 1603 { 1604 struct cam_ed *device; 1605 1606 sim_lock_assert_owned(periph->sim->lock); 1607 1608 device = periph->path->device; 1609 1610 if (device != NULL) { 1611 struct periph_list *periph_head; 1612 1613 periph_head = &device->periphs; 1614 1615 /* Release the slot for this peripheral */ 1616 camq_resize(&device->drvq, device->drvq.array_size - 1); 1617 1618 device->generation++; 1619 1620 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1621 } 1622 1623 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 1624 xsoftc.xpt_generation++; 1625 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 1626 } 1627 1628 void 1629 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1630 { 1631 struct ccb_pathinq cpi; 1632 struct ccb_trans_settings cts; 1633 struct cam_path *path; 1634 u_int speed; 1635 u_int freq; 1636 u_int mb; 1637 1638 sim_lock_assert_owned(periph->sim->lock); 1639 1640 path = periph->path; 1641 /* 1642 * To ensure that this is printed in one piece, 1643 * mask out CAM interrupts. 1644 */ 1645 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1646 periph->periph_name, periph->unit_number, 1647 path->bus->sim->sim_name, 1648 path->bus->sim->unit_number, 1649 path->bus->sim->bus_id, 1650 path->target->target_id, 1651 path->device->lun_id); 1652 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1653 scsi_print_inquiry(&path->device->inq_data); 1654 if (bootverbose && path->device->serial_num_len > 0) { 1655 /* Don't wrap the screen - print only the first 60 chars */ 1656 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1657 periph->unit_number, path->device->serial_num); 1658 } 1659 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1660 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1661 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1662 xpt_action((union ccb*)&cts); 1663 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 1664 return; 1665 } 1666 1667 /* Ask the SIM for its base transfer speed */ 1668 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1669 cpi.ccb_h.func_code = XPT_PATH_INQ; 1670 xpt_action((union ccb *)&cpi); 1671 1672 speed = cpi.base_transfer_speed; 1673 freq = 0; 1674 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1675 struct ccb_trans_settings_spi *spi; 1676 1677 spi = &cts.xport_specific.spi; 1678 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1679 && spi->sync_offset != 0) { 1680 freq = scsi_calc_syncsrate(spi->sync_period); 1681 speed = freq; 1682 } 1683 1684 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1685 speed *= (0x01 << spi->bus_width); 1686 } 1687 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1688 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; 1689 if (fc->valid & CTS_FC_VALID_SPEED) { 1690 speed = fc->bitrate; 1691 } 1692 } 1693 1694 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { 1695 struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; 1696 if (sas->valid & CTS_SAS_VALID_SPEED) { 1697 speed = sas->bitrate; 1698 } 1699 } 1700 1701 mb = speed / 1000; 1702 if (mb > 0) 1703 kprintf("%s%d: %d.%03dMB/s transfers", 1704 periph->periph_name, periph->unit_number, 1705 mb, speed % 1000); 1706 else 1707 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1708 periph->unit_number, speed); 1709 /* Report additional information about SPI connections */ 1710 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1711 struct ccb_trans_settings_spi *spi; 1712 1713 spi = &cts.xport_specific.spi; 1714 if (freq != 0) { 1715 kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1716 freq % 1000, 1717 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1718 ? " DT" : "", 1719 spi->sync_offset); 1720 } 1721 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1722 && spi->bus_width > 0) { 1723 if (freq != 0) { 1724 kprintf(", "); 1725 } else { 1726 kprintf(" ("); 1727 } 1728 kprintf("%dbit)", 8 * (0x01 << spi->bus_width)); 1729 } else if (freq != 0) { 1730 kprintf(")"); 1731 } 1732 } 1733 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1734 struct ccb_trans_settings_fc *fc; 1735 1736 fc = &cts.xport_specific.fc; 1737 if (fc->valid & CTS_FC_VALID_WWNN) 1738 kprintf(" WWNN 0x%llx", (long long) fc->wwnn); 1739 if (fc->valid & CTS_FC_VALID_WWPN) 1740 kprintf(" WWPN 0x%llx", (long long) fc->wwpn); 1741 if (fc->valid & CTS_FC_VALID_PORT) 1742 kprintf(" PortID 0x%x", fc->port); 1743 } 1744 1745 if (path->device->inq_flags & SID_CmdQue 1746 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1747 kprintf("\n%s%d: Command Queueing Enabled", 1748 periph->periph_name, periph->unit_number); 1749 } 1750 kprintf("\n"); 1751 1752 /* 1753 * We only want to print the caller's announce string if they've 1754 * passed one in.. 1755 */ 1756 if (announce_string != NULL) 1757 kprintf("%s%d: %s\n", periph->periph_name, 1758 periph->unit_number, announce_string); 1759 } 1760 1761 static dev_match_ret 1762 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1763 struct cam_eb *bus) 1764 { 1765 dev_match_ret retval; 1766 int i; 1767 1768 retval = DM_RET_NONE; 1769 1770 /* 1771 * If we aren't given something to match against, that's an error. 1772 */ 1773 if (bus == NULL) 1774 return(DM_RET_ERROR); 1775 1776 /* 1777 * If there are no match entries, then this bus matches no 1778 * matter what. 1779 */ 1780 if ((patterns == NULL) || (num_patterns == 0)) 1781 return(DM_RET_DESCEND | DM_RET_COPY); 1782 1783 for (i = 0; i < num_patterns; i++) { 1784 struct bus_match_pattern *cur_pattern; 1785 1786 /* 1787 * If the pattern in question isn't for a bus node, we 1788 * aren't interested. However, we do indicate to the 1789 * calling routine that we should continue descending the 1790 * tree, since the user wants to match against lower-level 1791 * EDT elements. 1792 */ 1793 if (patterns[i].type != DEV_MATCH_BUS) { 1794 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1795 retval |= DM_RET_DESCEND; 1796 continue; 1797 } 1798 1799 cur_pattern = &patterns[i].pattern.bus_pattern; 1800 1801 /* 1802 * If they want to match any bus node, we give them any 1803 * device node. 1804 */ 1805 if (cur_pattern->flags == BUS_MATCH_ANY) { 1806 /* set the copy flag */ 1807 retval |= DM_RET_COPY; 1808 1809 /* 1810 * If we've already decided on an action, go ahead 1811 * and return. 1812 */ 1813 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1814 return(retval); 1815 } 1816 1817 /* 1818 * Not sure why someone would do this... 1819 */ 1820 if (cur_pattern->flags == BUS_MATCH_NONE) 1821 continue; 1822 1823 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1824 && (cur_pattern->path_id != bus->path_id)) 1825 continue; 1826 1827 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1828 && (cur_pattern->bus_id != bus->sim->bus_id)) 1829 continue; 1830 1831 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1832 && (cur_pattern->unit_number != bus->sim->unit_number)) 1833 continue; 1834 1835 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1836 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1837 DEV_IDLEN) != 0)) 1838 continue; 1839 1840 /* 1841 * If we get to this point, the user definitely wants 1842 * information on this bus. So tell the caller to copy the 1843 * data out. 1844 */ 1845 retval |= DM_RET_COPY; 1846 1847 /* 1848 * If the return action has been set to descend, then we 1849 * know that we've already seen a non-bus matching 1850 * expression, therefore we need to further descend the tree. 1851 * This won't change by continuing around the loop, so we 1852 * go ahead and return. If we haven't seen a non-bus 1853 * matching expression, we keep going around the loop until 1854 * we exhaust the matching expressions. We'll set the stop 1855 * flag once we fall out of the loop. 1856 */ 1857 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1858 return(retval); 1859 } 1860 1861 /* 1862 * If the return action hasn't been set to descend yet, that means 1863 * we haven't seen anything other than bus matching patterns. So 1864 * tell the caller to stop descending the tree -- the user doesn't 1865 * want to match against lower level tree elements. 1866 */ 1867 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1868 retval |= DM_RET_STOP; 1869 1870 return(retval); 1871 } 1872 1873 static dev_match_ret 1874 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1875 struct cam_ed *device) 1876 { 1877 dev_match_ret retval; 1878 int i; 1879 1880 retval = DM_RET_NONE; 1881 1882 /* 1883 * If we aren't given something to match against, that's an error. 1884 */ 1885 if (device == NULL) 1886 return(DM_RET_ERROR); 1887 1888 /* 1889 * If there are no match entries, then this device matches no 1890 * matter what. 1891 */ 1892 if ((patterns == NULL) || (num_patterns == 0)) 1893 return(DM_RET_DESCEND | DM_RET_COPY); 1894 1895 for (i = 0; i < num_patterns; i++) { 1896 struct device_match_pattern *cur_pattern; 1897 1898 /* 1899 * If the pattern in question isn't for a device node, we 1900 * aren't interested. 1901 */ 1902 if (patterns[i].type != DEV_MATCH_DEVICE) { 1903 if ((patterns[i].type == DEV_MATCH_PERIPH) 1904 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1905 retval |= DM_RET_DESCEND; 1906 continue; 1907 } 1908 1909 cur_pattern = &patterns[i].pattern.device_pattern; 1910 1911 /* 1912 * If they want to match any device node, we give them any 1913 * device node. 1914 */ 1915 if (cur_pattern->flags == DEV_MATCH_ANY) { 1916 /* set the copy flag */ 1917 retval |= DM_RET_COPY; 1918 1919 1920 /* 1921 * If we've already decided on an action, go ahead 1922 * and return. 1923 */ 1924 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1925 return(retval); 1926 } 1927 1928 /* 1929 * Not sure why someone would do this... 1930 */ 1931 if (cur_pattern->flags == DEV_MATCH_NONE) 1932 continue; 1933 1934 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1935 && (cur_pattern->path_id != device->target->bus->path_id)) 1936 continue; 1937 1938 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1939 && (cur_pattern->target_id != device->target->target_id)) 1940 continue; 1941 1942 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1943 && (cur_pattern->target_lun != device->lun_id)) 1944 continue; 1945 1946 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1947 && (cam_quirkmatch((caddr_t)&device->inq_data, 1948 (caddr_t)&cur_pattern->inq_pat, 1949 1, sizeof(cur_pattern->inq_pat), 1950 scsi_static_inquiry_match) == NULL)) 1951 continue; 1952 1953 /* 1954 * If we get to this point, the user definitely wants 1955 * information on this device. So tell the caller to copy 1956 * the data out. 1957 */ 1958 retval |= DM_RET_COPY; 1959 1960 /* 1961 * If the return action has been set to descend, then we 1962 * know that we've already seen a peripheral matching 1963 * expression, therefore we need to further descend the tree. 1964 * This won't change by continuing around the loop, so we 1965 * go ahead and return. If we haven't seen a peripheral 1966 * matching expression, we keep going around the loop until 1967 * we exhaust the matching expressions. We'll set the stop 1968 * flag once we fall out of the loop. 1969 */ 1970 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1971 return(retval); 1972 } 1973 1974 /* 1975 * If the return action hasn't been set to descend yet, that means 1976 * we haven't seen any peripheral matching patterns. So tell the 1977 * caller to stop descending the tree -- the user doesn't want to 1978 * match against lower level tree elements. 1979 */ 1980 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1981 retval |= DM_RET_STOP; 1982 1983 return(retval); 1984 } 1985 1986 /* 1987 * Match a single peripheral against any number of match patterns. 1988 */ 1989 static dev_match_ret 1990 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1991 struct cam_periph *periph) 1992 { 1993 dev_match_ret retval; 1994 int i; 1995 1996 /* 1997 * If we aren't given something to match against, that's an error. 1998 */ 1999 if (periph == NULL) 2000 return(DM_RET_ERROR); 2001 2002 /* 2003 * If there are no match entries, then this peripheral matches no 2004 * matter what. 2005 */ 2006 if ((patterns == NULL) || (num_patterns == 0)) 2007 return(DM_RET_STOP | DM_RET_COPY); 2008 2009 /* 2010 * There aren't any nodes below a peripheral node, so there's no 2011 * reason to descend the tree any further. 2012 */ 2013 retval = DM_RET_STOP; 2014 2015 for (i = 0; i < num_patterns; i++) { 2016 struct periph_match_pattern *cur_pattern; 2017 2018 /* 2019 * If the pattern in question isn't for a peripheral, we 2020 * aren't interested. 2021 */ 2022 if (patterns[i].type != DEV_MATCH_PERIPH) 2023 continue; 2024 2025 cur_pattern = &patterns[i].pattern.periph_pattern; 2026 2027 /* 2028 * If they want to match on anything, then we will do so. 2029 */ 2030 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 2031 /* set the copy flag */ 2032 retval |= DM_RET_COPY; 2033 2034 /* 2035 * We've already set the return action to stop, 2036 * since there are no nodes below peripherals in 2037 * the tree. 2038 */ 2039 return(retval); 2040 } 2041 2042 /* 2043 * Not sure why someone would do this... 2044 */ 2045 if (cur_pattern->flags == PERIPH_MATCH_NONE) 2046 continue; 2047 2048 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 2049 && (cur_pattern->path_id != periph->path->bus->path_id)) 2050 continue; 2051 2052 /* 2053 * For the target and lun id's, we have to make sure the 2054 * target and lun pointers aren't NULL. The xpt peripheral 2055 * has a wildcard target and device. 2056 */ 2057 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 2058 && ((periph->path->target == NULL) 2059 ||(cur_pattern->target_id != periph->path->target->target_id))) 2060 continue; 2061 2062 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 2063 && ((periph->path->device == NULL) 2064 || (cur_pattern->target_lun != periph->path->device->lun_id))) 2065 continue; 2066 2067 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 2068 && (cur_pattern->unit_number != periph->unit_number)) 2069 continue; 2070 2071 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 2072 && (strncmp(cur_pattern->periph_name, periph->periph_name, 2073 DEV_IDLEN) != 0)) 2074 continue; 2075 2076 /* 2077 * If we get to this point, the user definitely wants 2078 * information on this peripheral. So tell the caller to 2079 * copy the data out. 2080 */ 2081 retval |= DM_RET_COPY; 2082 2083 /* 2084 * The return action has already been set to stop, since 2085 * peripherals don't have any nodes below them in the EDT. 2086 */ 2087 return(retval); 2088 } 2089 2090 /* 2091 * If we get to this point, the peripheral that was passed in 2092 * doesn't match any of the patterns. 2093 */ 2094 return(retval); 2095 } 2096 2097 static int 2098 xptedtbusfunc(struct cam_eb *bus, void *arg) 2099 { 2100 struct ccb_dev_match *cdm; 2101 dev_match_ret retval; 2102 2103 cdm = (struct ccb_dev_match *)arg; 2104 2105 /* 2106 * If our position is for something deeper in the tree, that means 2107 * that we've already seen this node. So, we keep going down. 2108 */ 2109 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2110 && (cdm->pos.cookie.bus == bus) 2111 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2112 && (cdm->pos.cookie.target != NULL)) 2113 retval = DM_RET_DESCEND; 2114 else 2115 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 2116 2117 /* 2118 * If we got an error, bail out of the search. 2119 */ 2120 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2121 cdm->status = CAM_DEV_MATCH_ERROR; 2122 return(0); 2123 } 2124 2125 /* 2126 * If the copy flag is set, copy this bus out. 2127 */ 2128 if (retval & DM_RET_COPY) { 2129 int spaceleft, j; 2130 2131 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2132 sizeof(struct dev_match_result)); 2133 2134 /* 2135 * If we don't have enough space to put in another 2136 * match result, save our position and tell the 2137 * user there are more devices to check. 2138 */ 2139 if (spaceleft < sizeof(struct dev_match_result)) { 2140 bzero(&cdm->pos, sizeof(cdm->pos)); 2141 cdm->pos.position_type = 2142 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 2143 2144 cdm->pos.cookie.bus = bus; 2145 cdm->pos.generations[CAM_BUS_GENERATION]= 2146 xsoftc.bus_generation; 2147 cdm->status = CAM_DEV_MATCH_MORE; 2148 return(0); 2149 } 2150 j = cdm->num_matches; 2151 cdm->num_matches++; 2152 cdm->matches[j].type = DEV_MATCH_BUS; 2153 cdm->matches[j].result.bus_result.path_id = bus->path_id; 2154 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 2155 cdm->matches[j].result.bus_result.unit_number = 2156 bus->sim->unit_number; 2157 strncpy(cdm->matches[j].result.bus_result.dev_name, 2158 bus->sim->sim_name, DEV_IDLEN); 2159 } 2160 2161 /* 2162 * If the user is only interested in busses, there's no 2163 * reason to descend to the next level in the tree. 2164 */ 2165 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2166 return(1); 2167 2168 /* 2169 * If there is a target generation recorded, check it to 2170 * make sure the target list hasn't changed. 2171 */ 2172 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2173 && (bus == cdm->pos.cookie.bus) 2174 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2175 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 2176 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 2177 bus->generation)) { 2178 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2179 return(0); 2180 } 2181 2182 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2183 && (cdm->pos.cookie.bus == bus) 2184 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2185 && (cdm->pos.cookie.target != NULL)) 2186 return(xpttargettraverse(bus, 2187 (struct cam_et *)cdm->pos.cookie.target, 2188 xptedttargetfunc, arg)); 2189 else 2190 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 2191 } 2192 2193 static int 2194 xptedttargetfunc(struct cam_et *target, void *arg) 2195 { 2196 struct ccb_dev_match *cdm; 2197 2198 cdm = (struct ccb_dev_match *)arg; 2199 2200 /* 2201 * If there is a device list generation recorded, check it to 2202 * make sure the device list hasn't changed. 2203 */ 2204 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2205 && (cdm->pos.cookie.bus == target->bus) 2206 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2207 && (cdm->pos.cookie.target == target) 2208 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2209 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2210 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2211 target->generation)) { 2212 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2213 return(0); 2214 } 2215 2216 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2217 && (cdm->pos.cookie.bus == target->bus) 2218 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2219 && (cdm->pos.cookie.target == target) 2220 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2221 && (cdm->pos.cookie.device != NULL)) 2222 return(xptdevicetraverse(target, 2223 (struct cam_ed *)cdm->pos.cookie.device, 2224 xptedtdevicefunc, arg)); 2225 else 2226 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2227 } 2228 2229 static int 2230 xptedtdevicefunc(struct cam_ed *device, void *arg) 2231 { 2232 2233 struct ccb_dev_match *cdm; 2234 dev_match_ret retval; 2235 2236 cdm = (struct ccb_dev_match *)arg; 2237 2238 /* 2239 * If our position is for something deeper in the tree, that means 2240 * that we've already seen this node. So, we keep going down. 2241 */ 2242 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2243 && (cdm->pos.cookie.device == device) 2244 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2245 && (cdm->pos.cookie.periph != NULL)) 2246 retval = DM_RET_DESCEND; 2247 else 2248 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2249 device); 2250 2251 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2252 cdm->status = CAM_DEV_MATCH_ERROR; 2253 return(0); 2254 } 2255 2256 /* 2257 * If the copy flag is set, copy this device out. 2258 */ 2259 if (retval & DM_RET_COPY) { 2260 int spaceleft, j; 2261 2262 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2263 sizeof(struct dev_match_result)); 2264 2265 /* 2266 * If we don't have enough space to put in another 2267 * match result, save our position and tell the 2268 * user there are more devices to check. 2269 */ 2270 if (spaceleft < sizeof(struct dev_match_result)) { 2271 bzero(&cdm->pos, sizeof(cdm->pos)); 2272 cdm->pos.position_type = 2273 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2274 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2275 2276 cdm->pos.cookie.bus = device->target->bus; 2277 cdm->pos.generations[CAM_BUS_GENERATION]= 2278 xsoftc.bus_generation; 2279 cdm->pos.cookie.target = device->target; 2280 cdm->pos.generations[CAM_TARGET_GENERATION] = 2281 device->target->bus->generation; 2282 cdm->pos.cookie.device = device; 2283 cdm->pos.generations[CAM_DEV_GENERATION] = 2284 device->target->generation; 2285 cdm->status = CAM_DEV_MATCH_MORE; 2286 return(0); 2287 } 2288 j = cdm->num_matches; 2289 cdm->num_matches++; 2290 cdm->matches[j].type = DEV_MATCH_DEVICE; 2291 cdm->matches[j].result.device_result.path_id = 2292 device->target->bus->path_id; 2293 cdm->matches[j].result.device_result.target_id = 2294 device->target->target_id; 2295 cdm->matches[j].result.device_result.target_lun = 2296 device->lun_id; 2297 bcopy(&device->inq_data, 2298 &cdm->matches[j].result.device_result.inq_data, 2299 sizeof(struct scsi_inquiry_data)); 2300 2301 /* Let the user know whether this device is unconfigured */ 2302 if (device->flags & CAM_DEV_UNCONFIGURED) 2303 cdm->matches[j].result.device_result.flags = 2304 DEV_RESULT_UNCONFIGURED; 2305 else 2306 cdm->matches[j].result.device_result.flags = 2307 DEV_RESULT_NOFLAG; 2308 } 2309 2310 /* 2311 * If the user isn't interested in peripherals, don't descend 2312 * the tree any further. 2313 */ 2314 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2315 return(1); 2316 2317 /* 2318 * If there is a peripheral list generation recorded, make sure 2319 * it hasn't changed. 2320 */ 2321 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2322 && (device->target->bus == cdm->pos.cookie.bus) 2323 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2324 && (device->target == cdm->pos.cookie.target) 2325 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2326 && (device == cdm->pos.cookie.device) 2327 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2328 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2329 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2330 device->generation)){ 2331 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2332 return(0); 2333 } 2334 2335 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2336 && (cdm->pos.cookie.bus == device->target->bus) 2337 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2338 && (cdm->pos.cookie.target == device->target) 2339 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2340 && (cdm->pos.cookie.device == device) 2341 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2342 && (cdm->pos.cookie.periph != NULL)) 2343 return(xptperiphtraverse(device, 2344 (struct cam_periph *)cdm->pos.cookie.periph, 2345 xptedtperiphfunc, arg)); 2346 else 2347 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2348 } 2349 2350 static int 2351 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2352 { 2353 struct ccb_dev_match *cdm; 2354 dev_match_ret retval; 2355 2356 cdm = (struct ccb_dev_match *)arg; 2357 2358 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2359 2360 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2361 cdm->status = CAM_DEV_MATCH_ERROR; 2362 return(0); 2363 } 2364 2365 /* 2366 * If the copy flag is set, copy this peripheral out. 2367 */ 2368 if (retval & DM_RET_COPY) { 2369 int spaceleft, j; 2370 2371 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2372 sizeof(struct dev_match_result)); 2373 2374 /* 2375 * If we don't have enough space to put in another 2376 * match result, save our position and tell the 2377 * user there are more devices to check. 2378 */ 2379 if (spaceleft < sizeof(struct dev_match_result)) { 2380 bzero(&cdm->pos, sizeof(cdm->pos)); 2381 cdm->pos.position_type = 2382 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2383 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2384 CAM_DEV_POS_PERIPH; 2385 2386 cdm->pos.cookie.bus = periph->path->bus; 2387 cdm->pos.generations[CAM_BUS_GENERATION]= 2388 xsoftc.bus_generation; 2389 cdm->pos.cookie.target = periph->path->target; 2390 cdm->pos.generations[CAM_TARGET_GENERATION] = 2391 periph->path->bus->generation; 2392 cdm->pos.cookie.device = periph->path->device; 2393 cdm->pos.generations[CAM_DEV_GENERATION] = 2394 periph->path->target->generation; 2395 cdm->pos.cookie.periph = periph; 2396 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2397 periph->path->device->generation; 2398 cdm->status = CAM_DEV_MATCH_MORE; 2399 return(0); 2400 } 2401 2402 j = cdm->num_matches; 2403 cdm->num_matches++; 2404 cdm->matches[j].type = DEV_MATCH_PERIPH; 2405 cdm->matches[j].result.periph_result.path_id = 2406 periph->path->bus->path_id; 2407 cdm->matches[j].result.periph_result.target_id = 2408 periph->path->target->target_id; 2409 cdm->matches[j].result.periph_result.target_lun = 2410 periph->path->device->lun_id; 2411 cdm->matches[j].result.periph_result.unit_number = 2412 periph->unit_number; 2413 strncpy(cdm->matches[j].result.periph_result.periph_name, 2414 periph->periph_name, DEV_IDLEN); 2415 } 2416 2417 return(1); 2418 } 2419 2420 static int 2421 xptedtmatch(struct ccb_dev_match *cdm) 2422 { 2423 int ret; 2424 2425 cdm->num_matches = 0; 2426 2427 /* 2428 * Check the bus list generation. If it has changed, the user 2429 * needs to reset everything and start over. 2430 */ 2431 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2432 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2433 && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { 2434 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2435 return(0); 2436 } 2437 2438 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2439 && (cdm->pos.cookie.bus != NULL)) 2440 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2441 xptedtbusfunc, cdm); 2442 else 2443 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2444 2445 /* 2446 * If we get back 0, that means that we had to stop before fully 2447 * traversing the EDT. It also means that one of the subroutines 2448 * has set the status field to the proper value. If we get back 1, 2449 * we've fully traversed the EDT and copied out any matching entries. 2450 */ 2451 if (ret == 1) 2452 cdm->status = CAM_DEV_MATCH_LAST; 2453 2454 return(ret); 2455 } 2456 2457 static int 2458 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2459 { 2460 struct ccb_dev_match *cdm; 2461 2462 cdm = (struct ccb_dev_match *)arg; 2463 2464 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2465 && (cdm->pos.cookie.pdrv == pdrv) 2466 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2467 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2468 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2469 (*pdrv)->generation)) { 2470 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2471 return(0); 2472 } 2473 2474 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2475 && (cdm->pos.cookie.pdrv == pdrv) 2476 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2477 && (cdm->pos.cookie.periph != NULL)) 2478 return(xptpdperiphtraverse(pdrv, 2479 (struct cam_periph *)cdm->pos.cookie.periph, 2480 xptplistperiphfunc, arg)); 2481 else 2482 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2483 } 2484 2485 static int 2486 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2487 { 2488 struct ccb_dev_match *cdm; 2489 dev_match_ret retval; 2490 2491 cdm = (struct ccb_dev_match *)arg; 2492 2493 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2494 2495 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2496 cdm->status = CAM_DEV_MATCH_ERROR; 2497 return(0); 2498 } 2499 2500 /* 2501 * If the copy flag is set, copy this peripheral out. 2502 */ 2503 if (retval & DM_RET_COPY) { 2504 int spaceleft, j; 2505 2506 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2507 sizeof(struct dev_match_result)); 2508 2509 /* 2510 * If we don't have enough space to put in another 2511 * match result, save our position and tell the 2512 * user there are more devices to check. 2513 */ 2514 if (spaceleft < sizeof(struct dev_match_result)) { 2515 struct periph_driver **pdrv; 2516 2517 pdrv = NULL; 2518 bzero(&cdm->pos, sizeof(cdm->pos)); 2519 cdm->pos.position_type = 2520 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2521 CAM_DEV_POS_PERIPH; 2522 2523 /* 2524 * This may look a bit non-sensical, but it is 2525 * actually quite logical. There are very few 2526 * peripheral drivers, and bloating every peripheral 2527 * structure with a pointer back to its parent 2528 * peripheral driver linker set entry would cost 2529 * more in the long run than doing this quick lookup. 2530 */ 2531 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2532 if (strcmp((*pdrv)->driver_name, 2533 periph->periph_name) == 0) 2534 break; 2535 } 2536 2537 if (*pdrv == NULL) { 2538 cdm->status = CAM_DEV_MATCH_ERROR; 2539 return(0); 2540 } 2541 2542 cdm->pos.cookie.pdrv = pdrv; 2543 /* 2544 * The periph generation slot does double duty, as 2545 * does the periph pointer slot. They are used for 2546 * both edt and pdrv lookups and positioning. 2547 */ 2548 cdm->pos.cookie.periph = periph; 2549 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2550 (*pdrv)->generation; 2551 cdm->status = CAM_DEV_MATCH_MORE; 2552 return(0); 2553 } 2554 2555 j = cdm->num_matches; 2556 cdm->num_matches++; 2557 cdm->matches[j].type = DEV_MATCH_PERIPH; 2558 cdm->matches[j].result.periph_result.path_id = 2559 periph->path->bus->path_id; 2560 2561 /* 2562 * The transport layer peripheral doesn't have a target or 2563 * lun. 2564 */ 2565 if (periph->path->target) 2566 cdm->matches[j].result.periph_result.target_id = 2567 periph->path->target->target_id; 2568 else 2569 cdm->matches[j].result.periph_result.target_id = -1; 2570 2571 if (periph->path->device) 2572 cdm->matches[j].result.periph_result.target_lun = 2573 periph->path->device->lun_id; 2574 else 2575 cdm->matches[j].result.periph_result.target_lun = -1; 2576 2577 cdm->matches[j].result.periph_result.unit_number = 2578 periph->unit_number; 2579 strncpy(cdm->matches[j].result.periph_result.periph_name, 2580 periph->periph_name, DEV_IDLEN); 2581 } 2582 2583 return(1); 2584 } 2585 2586 static int 2587 xptperiphlistmatch(struct ccb_dev_match *cdm) 2588 { 2589 int ret; 2590 2591 cdm->num_matches = 0; 2592 2593 /* 2594 * At this point in the edt traversal function, we check the bus 2595 * list generation to make sure that no busses have been added or 2596 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2597 * For the peripheral driver list traversal function, however, we 2598 * don't have to worry about new peripheral driver types coming or 2599 * going; they're in a linker set, and therefore can't change 2600 * without a recompile. 2601 */ 2602 2603 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2604 && (cdm->pos.cookie.pdrv != NULL)) 2605 ret = xptpdrvtraverse( 2606 (struct periph_driver **)cdm->pos.cookie.pdrv, 2607 xptplistpdrvfunc, cdm); 2608 else 2609 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2610 2611 /* 2612 * If we get back 0, that means that we had to stop before fully 2613 * traversing the peripheral driver tree. It also means that one of 2614 * the subroutines has set the status field to the proper value. If 2615 * we get back 1, we've fully traversed the EDT and copied out any 2616 * matching entries. 2617 */ 2618 if (ret == 1) 2619 cdm->status = CAM_DEV_MATCH_LAST; 2620 2621 return(ret); 2622 } 2623 2624 static int 2625 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2626 { 2627 struct cam_eb *bus, *next_bus; 2628 int retval; 2629 2630 retval = 1; 2631 2632 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2633 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); 2634 bus != NULL; 2635 bus = next_bus) { 2636 next_bus = TAILQ_NEXT(bus, links); 2637 2638 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2639 CAM_SIM_LOCK(bus->sim); 2640 retval = tr_func(bus, arg); 2641 CAM_SIM_UNLOCK(bus->sim); 2642 if (retval == 0) 2643 return(retval); 2644 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 2645 } 2646 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 2647 2648 return(retval); 2649 } 2650 2651 static int 2652 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2653 xpt_targetfunc_t *tr_func, void *arg) 2654 { 2655 struct cam_et *target, *next_target; 2656 int retval; 2657 2658 retval = 1; 2659 for (target = (start_target ? start_target : 2660 TAILQ_FIRST(&bus->et_entries)); 2661 target != NULL; target = next_target) { 2662 2663 next_target = TAILQ_NEXT(target, links); 2664 2665 retval = tr_func(target, arg); 2666 2667 if (retval == 0) 2668 return(retval); 2669 } 2670 2671 return(retval); 2672 } 2673 2674 static int 2675 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2676 xpt_devicefunc_t *tr_func, void *arg) 2677 { 2678 struct cam_ed *device, *next_device; 2679 int retval; 2680 2681 retval = 1; 2682 for (device = (start_device ? start_device : 2683 TAILQ_FIRST(&target->ed_entries)); 2684 device != NULL; 2685 device = next_device) { 2686 2687 next_device = TAILQ_NEXT(device, links); 2688 2689 retval = tr_func(device, arg); 2690 2691 if (retval == 0) 2692 return(retval); 2693 } 2694 2695 return(retval); 2696 } 2697 2698 static int 2699 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2700 xpt_periphfunc_t *tr_func, void *arg) 2701 { 2702 struct cam_periph *periph, *next_periph; 2703 int retval; 2704 2705 retval = 1; 2706 2707 for (periph = (start_periph ? start_periph : 2708 SLIST_FIRST(&device->periphs)); 2709 periph != NULL; 2710 periph = next_periph) { 2711 2712 next_periph = SLIST_NEXT(periph, periph_links); 2713 2714 retval = tr_func(periph, arg); 2715 if (retval == 0) 2716 return(retval); 2717 } 2718 2719 return(retval); 2720 } 2721 2722 static int 2723 xptpdrvtraverse(struct periph_driver **start_pdrv, 2724 xpt_pdrvfunc_t *tr_func, void *arg) 2725 { 2726 struct periph_driver **pdrv; 2727 int retval; 2728 2729 retval = 1; 2730 2731 /* 2732 * We don't traverse the peripheral driver list like we do the 2733 * other lists, because it is a linker set, and therefore cannot be 2734 * changed during runtime. If the peripheral driver list is ever 2735 * re-done to be something other than a linker set (i.e. it can 2736 * change while the system is running), the list traversal should 2737 * be modified to work like the other traversal functions. 2738 */ 2739 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2740 *pdrv != NULL; pdrv++) { 2741 retval = tr_func(pdrv, arg); 2742 2743 if (retval == 0) 2744 return(retval); 2745 } 2746 2747 return(retval); 2748 } 2749 2750 static int 2751 xptpdperiphtraverse(struct periph_driver **pdrv, 2752 struct cam_periph *start_periph, 2753 xpt_periphfunc_t *tr_func, void *arg) 2754 { 2755 struct cam_periph *periph, *next_periph; 2756 int retval; 2757 2758 retval = 1; 2759 2760 for (periph = (start_periph ? start_periph : 2761 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2762 periph = next_periph) { 2763 2764 next_periph = TAILQ_NEXT(periph, unit_links); 2765 2766 retval = tr_func(periph, arg); 2767 if (retval == 0) 2768 return(retval); 2769 } 2770 return(retval); 2771 } 2772 2773 static int 2774 xptdefbusfunc(struct cam_eb *bus, void *arg) 2775 { 2776 struct xpt_traverse_config *tr_config; 2777 2778 tr_config = (struct xpt_traverse_config *)arg; 2779 2780 if (tr_config->depth == XPT_DEPTH_BUS) { 2781 xpt_busfunc_t *tr_func; 2782 2783 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2784 2785 return(tr_func(bus, tr_config->tr_arg)); 2786 } else 2787 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2788 } 2789 2790 static int 2791 xptdeftargetfunc(struct cam_et *target, void *arg) 2792 { 2793 struct xpt_traverse_config *tr_config; 2794 2795 tr_config = (struct xpt_traverse_config *)arg; 2796 2797 if (tr_config->depth == XPT_DEPTH_TARGET) { 2798 xpt_targetfunc_t *tr_func; 2799 2800 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2801 2802 return(tr_func(target, tr_config->tr_arg)); 2803 } else 2804 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2805 } 2806 2807 static int 2808 xptdefdevicefunc(struct cam_ed *device, void *arg) 2809 { 2810 struct xpt_traverse_config *tr_config; 2811 2812 tr_config = (struct xpt_traverse_config *)arg; 2813 2814 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2815 xpt_devicefunc_t *tr_func; 2816 2817 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2818 2819 return(tr_func(device, tr_config->tr_arg)); 2820 } else 2821 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2822 } 2823 2824 static int 2825 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2826 { 2827 struct xpt_traverse_config *tr_config; 2828 xpt_periphfunc_t *tr_func; 2829 2830 tr_config = (struct xpt_traverse_config *)arg; 2831 2832 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2833 2834 /* 2835 * Unlike the other default functions, we don't check for depth 2836 * here. The peripheral driver level is the last level in the EDT, 2837 * so if we're here, we should execute the function in question. 2838 */ 2839 return(tr_func(periph, tr_config->tr_arg)); 2840 } 2841 2842 /* 2843 * Execute the given function for every bus in the EDT. 2844 */ 2845 static int 2846 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2847 { 2848 struct xpt_traverse_config tr_config; 2849 2850 tr_config.depth = XPT_DEPTH_BUS; 2851 tr_config.tr_func = tr_func; 2852 tr_config.tr_arg = arg; 2853 2854 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2855 } 2856 2857 /* 2858 * Execute the given function for every device in the EDT. 2859 */ 2860 static int 2861 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2862 { 2863 struct xpt_traverse_config tr_config; 2864 2865 tr_config.depth = XPT_DEPTH_DEVICE; 2866 tr_config.tr_func = tr_func; 2867 tr_config.tr_arg = arg; 2868 2869 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2870 } 2871 2872 static int 2873 xptsetasyncfunc(struct cam_ed *device, void *arg) 2874 { 2875 struct cam_path path; 2876 struct ccb_getdev cgd; 2877 struct async_node *cur_entry; 2878 2879 cur_entry = (struct async_node *)arg; 2880 2881 /* 2882 * Don't report unconfigured devices (Wildcard devs, 2883 * devices only for target mode, device instances 2884 * that have been invalidated but are waiting for 2885 * their last reference count to be released). 2886 */ 2887 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2888 return (1); 2889 2890 xpt_compile_path(&path, 2891 NULL, 2892 device->target->bus->path_id, 2893 device->target->target_id, 2894 device->lun_id); 2895 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2896 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2897 xpt_action((union ccb *)&cgd); 2898 cur_entry->callback(cur_entry->callback_arg, 2899 AC_FOUND_DEVICE, 2900 &path, &cgd); 2901 xpt_release_path(&path); 2902 2903 return(1); 2904 } 2905 2906 static int 2907 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2908 { 2909 struct cam_path path; 2910 struct ccb_pathinq cpi; 2911 struct async_node *cur_entry; 2912 2913 cur_entry = (struct async_node *)arg; 2914 2915 xpt_compile_path(&path, /*periph*/NULL, 2916 bus->sim->path_id, 2917 CAM_TARGET_WILDCARD, 2918 CAM_LUN_WILDCARD); 2919 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2920 cpi.ccb_h.func_code = XPT_PATH_INQ; 2921 xpt_action((union ccb *)&cpi); 2922 cur_entry->callback(cur_entry->callback_arg, 2923 AC_PATH_REGISTERED, 2924 &path, &cpi); 2925 xpt_release_path(&path); 2926 2927 return(1); 2928 } 2929 2930 static void 2931 xpt_action_sasync_cb(void *context, int pending) 2932 { 2933 struct async_node *cur_entry; 2934 struct xpt_task *task; 2935 uint32_t added; 2936 2937 task = (struct xpt_task *)context; 2938 cur_entry = (struct async_node *)task->data1; 2939 added = task->data2; 2940 2941 if ((added & AC_FOUND_DEVICE) != 0) { 2942 /* 2943 * Get this peripheral up to date with all 2944 * the currently existing devices. 2945 */ 2946 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 2947 } 2948 if ((added & AC_PATH_REGISTERED) != 0) { 2949 /* 2950 * Get this peripheral up to date with all 2951 * the currently existing busses. 2952 */ 2953 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 2954 } 2955 2956 kfree(task, M_CAMXPT); 2957 } 2958 2959 void 2960 xpt_action(union ccb *start_ccb) 2961 { 2962 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2963 2964 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2965 2966 switch (start_ccb->ccb_h.func_code) { 2967 case XPT_SCSI_IO: 2968 { 2969 struct cam_ed *device; 2970 #ifdef CAMDEBUG 2971 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2972 struct cam_path *path; 2973 2974 path = start_ccb->ccb_h.path; 2975 #endif 2976 2977 /* 2978 * For the sake of compatibility with SCSI-1 2979 * devices that may not understand the identify 2980 * message, we include lun information in the 2981 * second byte of all commands. SCSI-1 specifies 2982 * that luns are a 3 bit value and reserves only 3 2983 * bits for lun information in the CDB. Later 2984 * revisions of the SCSI spec allow for more than 8 2985 * luns, but have deprecated lun information in the 2986 * CDB. So, if the lun won't fit, we must omit. 2987 * 2988 * Also be aware that during initial probing for devices, 2989 * the inquiry information is unknown but initialized to 0. 2990 * This means that this code will be exercised while probing 2991 * devices with an ANSI revision greater than 2. 2992 */ 2993 device = start_ccb->ccb_h.path->device; 2994 if (device->protocol_version <= SCSI_REV_2 2995 && start_ccb->ccb_h.target_lun < 8 2996 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2997 2998 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2999 start_ccb->ccb_h.target_lun << 5; 3000 } 3001 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 3002 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 3003 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 3004 &path->device->inq_data), 3005 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 3006 cdb_str, sizeof(cdb_str)))); 3007 /* FALLTHROUGH */ 3008 } 3009 case XPT_TARGET_IO: 3010 case XPT_CONT_TARGET_IO: 3011 start_ccb->csio.sense_resid = 0; 3012 start_ccb->csio.resid = 0; 3013 /* FALLTHROUGH */ 3014 case XPT_RESET_DEV: 3015 case XPT_ENG_EXEC: 3016 { 3017 struct cam_path *path; 3018 struct cam_sim *sim; 3019 int runq; 3020 3021 path = start_ccb->ccb_h.path; 3022 3023 sim = path->bus->sim; 3024 if (SIM_DEAD(sim)) { 3025 /* The SIM has gone; just execute the CCB directly. */ 3026 cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); 3027 (*(sim->sim_action))(sim, start_ccb); 3028 break; 3029 } 3030 3031 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 3032 if (path->device->qfrozen_cnt == 0) 3033 runq = xpt_schedule_dev_sendq(path->bus, path->device); 3034 else 3035 runq = 0; 3036 if (runq != 0) 3037 xpt_run_dev_sendq(path->bus); 3038 break; 3039 } 3040 case XPT_SET_TRAN_SETTINGS: 3041 { 3042 xpt_set_transfer_settings(&start_ccb->cts, 3043 start_ccb->ccb_h.path->device, 3044 /*async_update*/FALSE); 3045 break; 3046 } 3047 case XPT_CALC_GEOMETRY: 3048 { 3049 struct cam_sim *sim; 3050 3051 /* Filter out garbage */ 3052 if (start_ccb->ccg.block_size == 0 3053 || start_ccb->ccg.volume_size == 0) { 3054 start_ccb->ccg.cylinders = 0; 3055 start_ccb->ccg.heads = 0; 3056 start_ccb->ccg.secs_per_track = 0; 3057 start_ccb->ccb_h.status = CAM_REQ_CMP; 3058 break; 3059 } 3060 sim = start_ccb->ccb_h.path->bus->sim; 3061 (*(sim->sim_action))(sim, start_ccb); 3062 break; 3063 } 3064 case XPT_ABORT: 3065 { 3066 union ccb* abort_ccb; 3067 3068 abort_ccb = start_ccb->cab.abort_ccb; 3069 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 3070 3071 if (abort_ccb->ccb_h.pinfo.index >= 0) { 3072 struct cam_ccbq *ccbq; 3073 3074 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3075 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3076 abort_ccb->ccb_h.status = 3077 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3078 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3079 xpt_done(abort_ccb); 3080 start_ccb->ccb_h.status = CAM_REQ_CMP; 3081 break; 3082 } 3083 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3084 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3085 /* 3086 * We've caught this ccb en route to 3087 * the SIM. Flag it for abort and the 3088 * SIM will do so just before starting 3089 * real work on the CCB. 3090 */ 3091 abort_ccb->ccb_h.status = 3092 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3093 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3094 start_ccb->ccb_h.status = CAM_REQ_CMP; 3095 break; 3096 } 3097 } 3098 if (XPT_FC_IS_QUEUED(abort_ccb) 3099 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3100 /* 3101 * It's already completed but waiting 3102 * for our SWI to get to it. 3103 */ 3104 start_ccb->ccb_h.status = CAM_UA_ABORT; 3105 break; 3106 } 3107 /* 3108 * If we weren't able to take care of the abort request 3109 * in the XPT, pass the request down to the SIM for processing. 3110 */ 3111 /* FALLTHROUGH */ 3112 } 3113 case XPT_ACCEPT_TARGET_IO: 3114 case XPT_EN_LUN: 3115 case XPT_IMMED_NOTIFY: 3116 case XPT_NOTIFY_ACK: 3117 case XPT_GET_TRAN_SETTINGS: 3118 case XPT_RESET_BUS: 3119 { 3120 struct cam_sim *sim; 3121 3122 sim = start_ccb->ccb_h.path->bus->sim; 3123 (*(sim->sim_action))(sim, start_ccb); 3124 break; 3125 } 3126 case XPT_PATH_INQ: 3127 { 3128 struct cam_sim *sim; 3129 3130 sim = start_ccb->ccb_h.path->bus->sim; 3131 (*(sim->sim_action))(sim, start_ccb); 3132 break; 3133 } 3134 case XPT_PATH_STATS: 3135 start_ccb->cpis.last_reset = 3136 start_ccb->ccb_h.path->bus->last_reset; 3137 start_ccb->ccb_h.status = CAM_REQ_CMP; 3138 break; 3139 case XPT_GDEV_TYPE: 3140 { 3141 struct cam_ed *dev; 3142 3143 dev = start_ccb->ccb_h.path->device; 3144 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3145 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3146 } else { 3147 struct ccb_getdev *cgd; 3148 struct cam_eb *bus; 3149 struct cam_et *tar; 3150 3151 cgd = &start_ccb->cgd; 3152 bus = cgd->ccb_h.path->bus; 3153 tar = cgd->ccb_h.path->target; 3154 cgd->inq_data = dev->inq_data; 3155 cgd->ccb_h.status = CAM_REQ_CMP; 3156 cgd->serial_num_len = dev->serial_num_len; 3157 if ((dev->serial_num_len > 0) 3158 && (dev->serial_num != NULL)) 3159 bcopy(dev->serial_num, cgd->serial_num, 3160 dev->serial_num_len); 3161 } 3162 break; 3163 } 3164 case XPT_GDEV_STATS: 3165 { 3166 struct cam_ed *dev; 3167 3168 dev = start_ccb->ccb_h.path->device; 3169 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3170 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3171 } else { 3172 struct ccb_getdevstats *cgds; 3173 struct cam_eb *bus; 3174 struct cam_et *tar; 3175 3176 cgds = &start_ccb->cgds; 3177 bus = cgds->ccb_h.path->bus; 3178 tar = cgds->ccb_h.path->target; 3179 cgds->dev_openings = dev->ccbq.dev_openings; 3180 cgds->dev_active = dev->ccbq.dev_active; 3181 cgds->devq_openings = dev->ccbq.devq_openings; 3182 cgds->devq_queued = dev->ccbq.queue.entries; 3183 cgds->held = dev->ccbq.held; 3184 cgds->last_reset = tar->last_reset; 3185 cgds->maxtags = dev->quirk->maxtags; 3186 cgds->mintags = dev->quirk->mintags; 3187 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3188 cgds->last_reset = bus->last_reset; 3189 cgds->ccb_h.status = CAM_REQ_CMP; 3190 } 3191 break; 3192 } 3193 case XPT_GDEVLIST: 3194 { 3195 struct cam_periph *nperiph; 3196 struct periph_list *periph_head; 3197 struct ccb_getdevlist *cgdl; 3198 u_int i; 3199 struct cam_ed *device; 3200 int found; 3201 3202 3203 found = 0; 3204 3205 /* 3206 * Don't want anyone mucking with our data. 3207 */ 3208 device = start_ccb->ccb_h.path->device; 3209 periph_head = &device->periphs; 3210 cgdl = &start_ccb->cgdl; 3211 3212 /* 3213 * Check and see if the list has changed since the user 3214 * last requested a list member. If so, tell them that the 3215 * list has changed, and therefore they need to start over 3216 * from the beginning. 3217 */ 3218 if ((cgdl->index != 0) && 3219 (cgdl->generation != device->generation)) { 3220 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3221 break; 3222 } 3223 3224 /* 3225 * Traverse the list of peripherals and attempt to find 3226 * the requested peripheral. 3227 */ 3228 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3229 (nperiph != NULL) && (i <= cgdl->index); 3230 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3231 if (i == cgdl->index) { 3232 strncpy(cgdl->periph_name, 3233 nperiph->periph_name, 3234 DEV_IDLEN); 3235 cgdl->unit_number = nperiph->unit_number; 3236 found = 1; 3237 } 3238 } 3239 if (found == 0) { 3240 cgdl->status = CAM_GDEVLIST_ERROR; 3241 break; 3242 } 3243 3244 if (nperiph == NULL) 3245 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3246 else 3247 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3248 3249 cgdl->index++; 3250 cgdl->generation = device->generation; 3251 3252 cgdl->ccb_h.status = CAM_REQ_CMP; 3253 break; 3254 } 3255 case XPT_DEV_MATCH: 3256 { 3257 dev_pos_type position_type; 3258 struct ccb_dev_match *cdm; 3259 int ret; 3260 3261 cdm = &start_ccb->cdm; 3262 3263 /* 3264 * There are two ways of getting at information in the EDT. 3265 * The first way is via the primary EDT tree. It starts 3266 * with a list of busses, then a list of targets on a bus, 3267 * then devices/luns on a target, and then peripherals on a 3268 * device/lun. The "other" way is by the peripheral driver 3269 * lists. The peripheral driver lists are organized by 3270 * peripheral driver. (obviously) So it makes sense to 3271 * use the peripheral driver list if the user is looking 3272 * for something like "da1", or all "da" devices. If the 3273 * user is looking for something on a particular bus/target 3274 * or lun, it's generally better to go through the EDT tree. 3275 */ 3276 3277 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3278 position_type = cdm->pos.position_type; 3279 else { 3280 u_int i; 3281 3282 position_type = CAM_DEV_POS_NONE; 3283 3284 for (i = 0; i < cdm->num_patterns; i++) { 3285 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3286 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3287 position_type = CAM_DEV_POS_EDT; 3288 break; 3289 } 3290 } 3291 3292 if (cdm->num_patterns == 0) 3293 position_type = CAM_DEV_POS_EDT; 3294 else if (position_type == CAM_DEV_POS_NONE) 3295 position_type = CAM_DEV_POS_PDRV; 3296 } 3297 3298 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3299 case CAM_DEV_POS_EDT: 3300 ret = xptedtmatch(cdm); 3301 break; 3302 case CAM_DEV_POS_PDRV: 3303 ret = xptperiphlistmatch(cdm); 3304 break; 3305 default: 3306 cdm->status = CAM_DEV_MATCH_ERROR; 3307 break; 3308 } 3309 3310 if (cdm->status == CAM_DEV_MATCH_ERROR) 3311 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3312 else 3313 start_ccb->ccb_h.status = CAM_REQ_CMP; 3314 3315 break; 3316 } 3317 case XPT_SASYNC_CB: 3318 { 3319 struct ccb_setasync *csa; 3320 struct async_node *cur_entry; 3321 struct async_list *async_head; 3322 u_int32_t added; 3323 3324 csa = &start_ccb->csa; 3325 added = csa->event_enable; 3326 async_head = &csa->ccb_h.path->device->asyncs; 3327 3328 /* 3329 * If there is already an entry for us, simply 3330 * update it. 3331 */ 3332 cur_entry = SLIST_FIRST(async_head); 3333 while (cur_entry != NULL) { 3334 if ((cur_entry->callback_arg == csa->callback_arg) 3335 && (cur_entry->callback == csa->callback)) 3336 break; 3337 cur_entry = SLIST_NEXT(cur_entry, links); 3338 } 3339 3340 if (cur_entry != NULL) { 3341 /* 3342 * If the request has no flags set, 3343 * remove the entry. 3344 */ 3345 added &= ~cur_entry->event_enable; 3346 if (csa->event_enable == 0) { 3347 SLIST_REMOVE(async_head, cur_entry, 3348 async_node, links); 3349 csa->ccb_h.path->device->refcount--; 3350 kfree(cur_entry, M_CAMXPT); 3351 } else { 3352 cur_entry->event_enable = csa->event_enable; 3353 } 3354 } else { 3355 cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, 3356 M_INTWAIT); 3357 cur_entry->event_enable = csa->event_enable; 3358 cur_entry->callback_arg = csa->callback_arg; 3359 cur_entry->callback = csa->callback; 3360 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3361 csa->ccb_h.path->device->refcount++; 3362 } 3363 3364 /* 3365 * Need to decouple this operation via a taskqueue so that 3366 * the locking doesn't become a mess. 3367 */ 3368 if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { 3369 struct xpt_task *task; 3370 3371 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, 3372 M_INTWAIT); 3373 3374 TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); 3375 task->data1 = cur_entry; 3376 task->data2 = added; 3377 taskqueue_enqueue(taskqueue_thread[mycpuid], 3378 &task->task); 3379 } 3380 3381 start_ccb->ccb_h.status = CAM_REQ_CMP; 3382 break; 3383 } 3384 case XPT_REL_SIMQ: 3385 { 3386 struct ccb_relsim *crs; 3387 struct cam_ed *dev; 3388 3389 crs = &start_ccb->crs; 3390 dev = crs->ccb_h.path->device; 3391 if (dev == NULL) { 3392 3393 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3394 break; 3395 } 3396 3397 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3398 3399 if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { 3400 /* Don't ever go below one opening */ 3401 if (crs->openings > 0) { 3402 xpt_dev_ccbq_resize(crs->ccb_h.path, 3403 crs->openings); 3404 3405 if (bootverbose) { 3406 xpt_print(crs->ccb_h.path, 3407 "tagged openings now %d\n", 3408 crs->openings); 3409 } 3410 } 3411 } 3412 } 3413 3414 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3415 3416 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3417 3418 /* 3419 * Just extend the old timeout and decrement 3420 * the freeze count so that a single timeout 3421 * is sufficient for releasing the queue. 3422 */ 3423 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3424 callout_stop(&dev->callout); 3425 } else { 3426 3427 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3428 } 3429 3430 callout_reset(&dev->callout, 3431 (crs->release_timeout * hz) / 1000, 3432 xpt_release_devq_timeout, dev); 3433 3434 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3435 3436 } 3437 3438 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3439 3440 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3441 /* 3442 * Decrement the freeze count so that a single 3443 * completion is still sufficient to unfreeze 3444 * the queue. 3445 */ 3446 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3447 } else { 3448 3449 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3450 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3451 } 3452 } 3453 3454 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3455 3456 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3457 || (dev->ccbq.dev_active == 0)) { 3458 3459 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3460 } else { 3461 3462 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3463 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3464 } 3465 } 3466 3467 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3468 3469 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3470 /*run_queue*/TRUE); 3471 } 3472 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3473 start_ccb->ccb_h.status = CAM_REQ_CMP; 3474 break; 3475 } 3476 case XPT_SCAN_BUS: 3477 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3478 break; 3479 case XPT_SCAN_LUN: 3480 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3481 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3482 start_ccb); 3483 break; 3484 case XPT_DEBUG: { 3485 #ifdef CAMDEBUG 3486 #ifdef CAM_DEBUG_DELAY 3487 cam_debug_delay = CAM_DEBUG_DELAY; 3488 #endif 3489 cam_dflags = start_ccb->cdbg.flags; 3490 if (cam_dpath != NULL) { 3491 xpt_free_path(cam_dpath); 3492 cam_dpath = NULL; 3493 } 3494 3495 if (cam_dflags != CAM_DEBUG_NONE) { 3496 if (xpt_create_path(&cam_dpath, xpt_periph, 3497 start_ccb->ccb_h.path_id, 3498 start_ccb->ccb_h.target_id, 3499 start_ccb->ccb_h.target_lun) != 3500 CAM_REQ_CMP) { 3501 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3502 cam_dflags = CAM_DEBUG_NONE; 3503 } else { 3504 start_ccb->ccb_h.status = CAM_REQ_CMP; 3505 xpt_print(cam_dpath, "debugging flags now %x\n", 3506 cam_dflags); 3507 } 3508 } else { 3509 cam_dpath = NULL; 3510 start_ccb->ccb_h.status = CAM_REQ_CMP; 3511 } 3512 #else /* !CAMDEBUG */ 3513 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3514 #endif /* CAMDEBUG */ 3515 break; 3516 } 3517 case XPT_NOOP: 3518 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3519 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3520 start_ccb->ccb_h.status = CAM_REQ_CMP; 3521 break; 3522 default: 3523 case XPT_SDEV_TYPE: 3524 case XPT_TERM_IO: 3525 case XPT_ENG_INQ: 3526 /* XXX Implement */ 3527 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3528 break; 3529 } 3530 } 3531 3532 void 3533 xpt_polled_action(union ccb *start_ccb) 3534 { 3535 u_int32_t timeout; 3536 struct cam_sim *sim; 3537 struct cam_devq *devq; 3538 struct cam_ed *dev; 3539 3540 timeout = start_ccb->ccb_h.timeout; 3541 sim = start_ccb->ccb_h.path->bus->sim; 3542 devq = sim->devq; 3543 dev = start_ccb->ccb_h.path->device; 3544 3545 sim_lock_assert_owned(sim->lock); 3546 3547 /* 3548 * Steal an opening so that no other queued requests 3549 * can get it before us while we simulate interrupts. 3550 */ 3551 dev->ccbq.devq_openings--; 3552 dev->ccbq.dev_openings--; 3553 3554 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3555 && (--timeout > 0)) { 3556 DELAY(1000); 3557 (*(sim->sim_poll))(sim); 3558 camisr_runqueue(sim); 3559 } 3560 3561 dev->ccbq.devq_openings++; 3562 dev->ccbq.dev_openings++; 3563 3564 if (timeout != 0) { 3565 xpt_action(start_ccb); 3566 while(--timeout > 0) { 3567 (*(sim->sim_poll))(sim); 3568 camisr_runqueue(sim); 3569 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3570 != CAM_REQ_INPROG) 3571 break; 3572 DELAY(1000); 3573 } 3574 if (timeout == 0) { 3575 /* 3576 * XXX Is it worth adding a sim_timeout entry 3577 * point so we can attempt recovery? If 3578 * this is only used for dumps, I don't think 3579 * it is. 3580 */ 3581 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3582 } 3583 } else { 3584 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3585 } 3586 } 3587 3588 /* 3589 * Schedule a peripheral driver to receive a ccb when it's 3590 * target device has space for more transactions. 3591 */ 3592 void 3593 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3594 { 3595 struct cam_ed *device; 3596 union ccb *work_ccb; 3597 int runq; 3598 3599 sim_lock_assert_owned(perph->sim->lock); 3600 3601 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3602 device = perph->path->device; 3603 if (periph_is_queued(perph)) { 3604 /* Simply reorder based on new priority */ 3605 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3606 (" change priority to %d\n", new_priority)); 3607 if (new_priority < perph->pinfo.priority) { 3608 camq_change_priority(&device->drvq, 3609 perph->pinfo.index, 3610 new_priority); 3611 } 3612 runq = 0; 3613 } else if (SIM_DEAD(perph->path->bus->sim)) { 3614 /* The SIM is gone so just call periph_start directly. */ 3615 work_ccb = xpt_get_ccb(perph->path->device); 3616 if (work_ccb == NULL) 3617 return; /* XXX */ 3618 xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); 3619 perph->pinfo.priority = new_priority; 3620 perph->periph_start(perph, work_ccb); 3621 return; 3622 } else { 3623 /* New entry on the queue */ 3624 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3625 (" added periph to queue\n")); 3626 perph->pinfo.priority = new_priority; 3627 perph->pinfo.generation = ++device->drvq.generation; 3628 camq_insert(&device->drvq, &perph->pinfo); 3629 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3630 } 3631 if (runq != 0) { 3632 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3633 (" calling xpt_run_devq\n")); 3634 xpt_run_dev_allocq(perph->path->bus); 3635 } 3636 } 3637 3638 3639 /* 3640 * Schedule a device to run on a given queue. 3641 * If the device was inserted as a new entry on the queue, 3642 * return 1 meaning the device queue should be run. If we 3643 * were already queued, implying someone else has already 3644 * started the queue, return 0 so the caller doesn't attempt 3645 * to run the queue. 3646 */ 3647 static int 3648 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3649 u_int32_t new_priority) 3650 { 3651 int retval; 3652 u_int32_t old_priority; 3653 3654 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3655 3656 old_priority = pinfo->priority; 3657 3658 /* 3659 * Are we already queued? 3660 */ 3661 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3662 /* Simply reorder based on new priority */ 3663 if (new_priority < old_priority) { 3664 camq_change_priority(queue, pinfo->index, 3665 new_priority); 3666 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3667 ("changed priority to %d\n", 3668 new_priority)); 3669 } 3670 retval = 0; 3671 } else { 3672 /* New entry on the queue */ 3673 if (new_priority < old_priority) 3674 pinfo->priority = new_priority; 3675 3676 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3677 ("Inserting onto queue\n")); 3678 pinfo->generation = ++queue->generation; 3679 camq_insert(queue, pinfo); 3680 retval = 1; 3681 } 3682 return (retval); 3683 } 3684 3685 static void 3686 xpt_run_dev_allocq(struct cam_eb *bus) 3687 { 3688 struct cam_devq *devq; 3689 3690 if ((devq = bus->sim->devq) == NULL) { 3691 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3692 return; 3693 } 3694 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3695 3696 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3697 (" qfrozen_cnt == 0x%x, entries == %d, " 3698 "openings == %d, active == %d\n", 3699 devq->alloc_queue.qfrozen_cnt, 3700 devq->alloc_queue.entries, 3701 devq->alloc_openings, 3702 devq->alloc_active)); 3703 3704 devq->alloc_queue.qfrozen_cnt++; 3705 while ((devq->alloc_queue.entries > 0) 3706 && (devq->alloc_openings > 0) 3707 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3708 struct cam_ed_qinfo *qinfo; 3709 struct cam_ed *device; 3710 union ccb *work_ccb; 3711 struct cam_periph *drv; 3712 struct camq *drvq; 3713 3714 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3715 CAMQ_HEAD); 3716 device = qinfo->device; 3717 3718 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3719 ("running device %p\n", device)); 3720 3721 drvq = &device->drvq; 3722 3723 #ifdef CAMDEBUG 3724 if (drvq->entries <= 0) { 3725 panic("xpt_run_dev_allocq: " 3726 "Device on queue without any work to do"); 3727 } 3728 #endif 3729 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3730 devq->alloc_openings--; 3731 devq->alloc_active++; 3732 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3733 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3734 drv->pinfo.priority); 3735 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3736 ("calling periph start\n")); 3737 drv->periph_start(drv, work_ccb); 3738 } else { 3739 /* 3740 * Malloc failure in alloc_ccb 3741 */ 3742 /* 3743 * XXX add us to a list to be run from free_ccb 3744 * if we don't have any ccbs active on this 3745 * device queue otherwise we may never get run 3746 * again. 3747 */ 3748 break; 3749 } 3750 3751 if (drvq->entries > 0) { 3752 /* We have more work. Attempt to reschedule */ 3753 xpt_schedule_dev_allocq(bus, device); 3754 } 3755 } 3756 devq->alloc_queue.qfrozen_cnt--; 3757 } 3758 3759 static void 3760 xpt_run_dev_sendq(struct cam_eb *bus) 3761 { 3762 struct cam_devq *devq; 3763 3764 if ((devq = bus->sim->devq) == NULL) { 3765 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3766 return; 3767 } 3768 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3769 3770 devq->send_queue.qfrozen_cnt++; 3771 while ((devq->send_queue.entries > 0) 3772 && (devq->send_openings > 0)) { 3773 struct cam_ed_qinfo *qinfo; 3774 struct cam_ed *device; 3775 union ccb *work_ccb; 3776 struct cam_sim *sim; 3777 3778 if (devq->send_queue.qfrozen_cnt > 1) { 3779 break; 3780 } 3781 3782 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3783 CAMQ_HEAD); 3784 device = qinfo->device; 3785 3786 /* 3787 * If the device has been "frozen", don't attempt 3788 * to run it. 3789 */ 3790 if (device->qfrozen_cnt > 0) { 3791 continue; 3792 } 3793 3794 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3795 ("running device %p\n", device)); 3796 3797 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3798 if (work_ccb == NULL) { 3799 kprintf("device on run queue with no ccbs???\n"); 3800 continue; 3801 } 3802 3803 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3804 3805 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 3806 if (xsoftc.num_highpower <= 0) { 3807 /* 3808 * We got a high power command, but we 3809 * don't have any available slots. Freeze 3810 * the device queue until we have a slot 3811 * available. 3812 */ 3813 device->qfrozen_cnt++; 3814 STAILQ_INSERT_TAIL(&xsoftc.highpowerq, 3815 &work_ccb->ccb_h, 3816 xpt_links.stqe); 3817 3818 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3819 continue; 3820 } else { 3821 /* 3822 * Consume a high power slot while 3823 * this ccb runs. 3824 */ 3825 xsoftc.num_highpower--; 3826 } 3827 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 3828 } 3829 devq->active_dev = device; 3830 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3831 3832 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3833 3834 devq->send_openings--; 3835 devq->send_active++; 3836 3837 if (device->ccbq.queue.entries > 0) 3838 xpt_schedule_dev_sendq(bus, device); 3839 3840 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3841 /* 3842 * The client wants to freeze the queue 3843 * after this CCB is sent. 3844 */ 3845 device->qfrozen_cnt++; 3846 } 3847 3848 /* In Target mode, the peripheral driver knows best... */ 3849 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3850 if ((device->inq_flags & SID_CmdQue) != 0 3851 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3852 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3853 else 3854 /* 3855 * Clear this in case of a retried CCB that 3856 * failed due to a rejected tag. 3857 */ 3858 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3859 } 3860 3861 /* 3862 * Device queues can be shared among multiple sim instances 3863 * that reside on different busses. Use the SIM in the queue 3864 * CCB's path, rather than the one in the bus that was passed 3865 * into this function. 3866 */ 3867 sim = work_ccb->ccb_h.path->bus->sim; 3868 (*(sim->sim_action))(sim, work_ccb); 3869 3870 devq->active_dev = NULL; 3871 } 3872 devq->send_queue.qfrozen_cnt--; 3873 } 3874 3875 /* 3876 * This function merges stuff from the slave ccb into the master ccb, while 3877 * keeping important fields in the master ccb constant. 3878 */ 3879 void 3880 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3881 { 3882 /* 3883 * Pull fields that are valid for peripheral drivers to set 3884 * into the master CCB along with the CCB "payload". 3885 */ 3886 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3887 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3888 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3889 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3890 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3891 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3892 } 3893 3894 void 3895 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3896 { 3897 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3898 callout_init(&ccb_h->timeout_ch); 3899 ccb_h->pinfo.priority = priority; 3900 ccb_h->path = path; 3901 ccb_h->path_id = path->bus->path_id; 3902 if (path->target) 3903 ccb_h->target_id = path->target->target_id; 3904 else 3905 ccb_h->target_id = CAM_TARGET_WILDCARD; 3906 if (path->device) { 3907 ccb_h->target_lun = path->device->lun_id; 3908 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3909 } else { 3910 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3911 } 3912 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3913 ccb_h->flags = 0; 3914 } 3915 3916 /* Path manipulation functions */ 3917 cam_status 3918 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3919 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3920 { 3921 struct cam_path *path; 3922 cam_status status; 3923 3924 path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); 3925 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3926 if (status != CAM_REQ_CMP) { 3927 kfree(path, M_CAMXPT); 3928 path = NULL; 3929 } 3930 *new_path_ptr = path; 3931 return (status); 3932 } 3933 3934 cam_status 3935 xpt_create_path_unlocked(struct cam_path **new_path_ptr, 3936 struct cam_periph *periph, path_id_t path_id, 3937 target_id_t target_id, lun_id_t lun_id) 3938 { 3939 struct cam_path *path; 3940 struct cam_eb *bus = NULL; 3941 cam_status status; 3942 int need_unlock = 0; 3943 3944 path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); 3945 3946 if (path_id != CAM_BUS_WILDCARD) { 3947 bus = xpt_find_bus(path_id); 3948 if (bus != NULL) { 3949 need_unlock = 1; 3950 CAM_SIM_LOCK(bus->sim); 3951 } 3952 } 3953 status = xpt_compile_path(path, periph, path_id, target_id, lun_id); 3954 if (need_unlock) 3955 CAM_SIM_UNLOCK(bus->sim); 3956 if (status != CAM_REQ_CMP) { 3957 kfree(path, M_CAMXPT); 3958 path = NULL; 3959 } 3960 *new_path_ptr = path; 3961 return (status); 3962 } 3963 3964 static cam_status 3965 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3966 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3967 { 3968 struct cam_eb *bus; 3969 struct cam_et *target; 3970 struct cam_ed *device; 3971 cam_status status; 3972 3973 status = CAM_REQ_CMP; /* Completed without error */ 3974 target = NULL; /* Wildcarded */ 3975 device = NULL; /* Wildcarded */ 3976 3977 /* 3978 * We will potentially modify the EDT, so block interrupts 3979 * that may attempt to create cam paths. 3980 */ 3981 bus = xpt_find_bus(path_id); 3982 if (bus == NULL) { 3983 status = CAM_PATH_INVALID; 3984 } else { 3985 target = xpt_find_target(bus, target_id); 3986 if (target == NULL) { 3987 /* Create one */ 3988 struct cam_et *new_target; 3989 3990 new_target = xpt_alloc_target(bus, target_id); 3991 if (new_target == NULL) { 3992 status = CAM_RESRC_UNAVAIL; 3993 } else { 3994 target = new_target; 3995 } 3996 } 3997 if (target != NULL) { 3998 device = xpt_find_device(target, lun_id); 3999 if (device == NULL) { 4000 /* Create one */ 4001 struct cam_ed *new_device; 4002 4003 new_device = xpt_alloc_device(bus, 4004 target, 4005 lun_id); 4006 if (new_device == NULL) { 4007 status = CAM_RESRC_UNAVAIL; 4008 } else { 4009 device = new_device; 4010 } 4011 } 4012 } 4013 } 4014 4015 /* 4016 * Only touch the user's data if we are successful. 4017 */ 4018 if (status == CAM_REQ_CMP) { 4019 new_path->periph = perph; 4020 new_path->bus = bus; 4021 new_path->target = target; 4022 new_path->device = device; 4023 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 4024 } else { 4025 if (device != NULL) 4026 xpt_release_device(bus, target, device); 4027 if (target != NULL) 4028 xpt_release_target(bus, target); 4029 if (bus != NULL) 4030 xpt_release_bus(bus); 4031 } 4032 return (status); 4033 } 4034 4035 static void 4036 xpt_release_path(struct cam_path *path) 4037 { 4038 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 4039 if (path->device != NULL) { 4040 xpt_release_device(path->bus, path->target, path->device); 4041 path->device = NULL; 4042 } 4043 if (path->target != NULL) { 4044 xpt_release_target(path->bus, path->target); 4045 path->target = NULL; 4046 } 4047 if (path->bus != NULL) { 4048 xpt_release_bus(path->bus); 4049 path->bus = NULL; 4050 } 4051 } 4052 4053 void 4054 xpt_free_path(struct cam_path *path) 4055 { 4056 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 4057 xpt_release_path(path); 4058 kfree(path, M_CAMXPT); 4059 } 4060 4061 4062 /* 4063 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 4064 * in path1, 2 for match with wildcards in path2. 4065 */ 4066 int 4067 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 4068 { 4069 int retval = 0; 4070 4071 if (path1->bus != path2->bus) { 4072 if (path1->bus->path_id == CAM_BUS_WILDCARD) 4073 retval = 1; 4074 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 4075 retval = 2; 4076 else 4077 return (-1); 4078 } 4079 if (path1->target != path2->target) { 4080 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 4081 if (retval == 0) 4082 retval = 1; 4083 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 4084 retval = 2; 4085 else 4086 return (-1); 4087 } 4088 if (path1->device != path2->device) { 4089 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4090 if (retval == 0) 4091 retval = 1; 4092 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4093 retval = 2; 4094 else 4095 return (-1); 4096 } 4097 return (retval); 4098 } 4099 4100 void 4101 xpt_print_path(struct cam_path *path) 4102 { 4103 4104 if (path == NULL) 4105 kprintf("(nopath): "); 4106 else { 4107 if (path->periph != NULL) 4108 kprintf("(%s%d:", path->periph->periph_name, 4109 path->periph->unit_number); 4110 else 4111 kprintf("(noperiph:"); 4112 4113 if (path->bus != NULL) 4114 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4115 path->bus->sim->unit_number, 4116 path->bus->sim->bus_id); 4117 else 4118 kprintf("nobus:"); 4119 4120 if (path->target != NULL) 4121 kprintf("%d:", path->target->target_id); 4122 else 4123 kprintf("X:"); 4124 4125 if (path->device != NULL) 4126 kprintf("%d): ", path->device->lun_id); 4127 else 4128 kprintf("X): "); 4129 } 4130 } 4131 4132 void 4133 xpt_print(struct cam_path *path, const char *fmt, ...) 4134 { 4135 __va_list ap; 4136 xpt_print_path(path); 4137 __va_start(ap, fmt); 4138 kvprintf(fmt, ap); 4139 __va_end(ap); 4140 } 4141 4142 int 4143 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4144 { 4145 struct sbuf sb; 4146 4147 sim_lock_assert_owned(path->bus->sim->lock); 4148 4149 sbuf_new(&sb, str, str_len, 0); 4150 4151 if (path == NULL) 4152 sbuf_printf(&sb, "(nopath): "); 4153 else { 4154 if (path->periph != NULL) 4155 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4156 path->periph->unit_number); 4157 else 4158 sbuf_printf(&sb, "(noperiph:"); 4159 4160 if (path->bus != NULL) 4161 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4162 path->bus->sim->unit_number, 4163 path->bus->sim->bus_id); 4164 else 4165 sbuf_printf(&sb, "nobus:"); 4166 4167 if (path->target != NULL) 4168 sbuf_printf(&sb, "%d:", path->target->target_id); 4169 else 4170 sbuf_printf(&sb, "X:"); 4171 4172 if (path->device != NULL) 4173 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4174 else 4175 sbuf_printf(&sb, "X): "); 4176 } 4177 sbuf_finish(&sb); 4178 4179 return(sbuf_len(&sb)); 4180 } 4181 4182 path_id_t 4183 xpt_path_path_id(struct cam_path *path) 4184 { 4185 sim_lock_assert_owned(path->bus->sim->lock); 4186 4187 return(path->bus->path_id); 4188 } 4189 4190 target_id_t 4191 xpt_path_target_id(struct cam_path *path) 4192 { 4193 sim_lock_assert_owned(path->bus->sim->lock); 4194 4195 if (path->target != NULL) 4196 return (path->target->target_id); 4197 else 4198 return (CAM_TARGET_WILDCARD); 4199 } 4200 4201 lun_id_t 4202 xpt_path_lun_id(struct cam_path *path) 4203 { 4204 sim_lock_assert_owned(path->bus->sim->lock); 4205 4206 if (path->device != NULL) 4207 return (path->device->lun_id); 4208 else 4209 return (CAM_LUN_WILDCARD); 4210 } 4211 4212 struct cam_sim * 4213 xpt_path_sim(struct cam_path *path) 4214 { 4215 return (path->bus->sim); 4216 } 4217 4218 struct cam_periph* 4219 xpt_path_periph(struct cam_path *path) 4220 { 4221 sim_lock_assert_owned(path->bus->sim->lock); 4222 4223 return (path->periph); 4224 } 4225 4226 /* 4227 * Release a CAM control block for the caller. Remit the cost of the structure 4228 * to the device referenced by the path. If the this device had no 'credits' 4229 * and peripheral drivers have registered async callbacks for this notification 4230 * call them now. 4231 */ 4232 void 4233 xpt_release_ccb(union ccb *free_ccb) 4234 { 4235 struct cam_path *path; 4236 struct cam_ed *device; 4237 struct cam_eb *bus; 4238 struct cam_sim *sim; 4239 4240 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4241 path = free_ccb->ccb_h.path; 4242 device = path->device; 4243 bus = path->bus; 4244 sim = bus->sim; 4245 4246 sim_lock_assert_owned(sim->lock); 4247 4248 cam_ccbq_release_opening(&device->ccbq); 4249 if (sim->ccb_count > sim->max_ccbs) { 4250 xpt_free_ccb(free_ccb); 4251 sim->ccb_count--; 4252 } else { 4253 SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, 4254 xpt_links.sle); 4255 } 4256 if (sim->devq == NULL) { 4257 return; 4258 } 4259 sim->devq->alloc_openings++; 4260 sim->devq->alloc_active--; 4261 /* XXX Turn this into an inline function - xpt_run_device?? */ 4262 if ((device_is_alloc_queued(device) == 0) 4263 && (device->drvq.entries > 0)) { 4264 xpt_schedule_dev_allocq(bus, device); 4265 } 4266 if (dev_allocq_is_runnable(sim->devq)) 4267 xpt_run_dev_allocq(bus); 4268 } 4269 4270 /* Functions accessed by SIM drivers */ 4271 4272 /* 4273 * A sim structure, listing the SIM entry points and instance 4274 * identification info is passed to xpt_bus_register to hook the SIM 4275 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4276 * for this new bus and places it in the array of busses and assigns 4277 * it a path_id. The path_id may be influenced by "hard wiring" 4278 * information specified by the user. Once interrupt services are 4279 * availible, the bus will be probed. 4280 */ 4281 int32_t 4282 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4283 { 4284 struct cam_eb *new_bus; 4285 struct cam_eb *old_bus; 4286 struct ccb_pathinq cpi; 4287 4288 sim_lock_assert_owned(sim->lock); 4289 4290 sim->bus_id = bus; 4291 new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); 4292 4293 if (strcmp(sim->sim_name, "xpt") != 0) { 4294 sim->path_id = 4295 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4296 } 4297 4298 TAILQ_INIT(&new_bus->et_entries); 4299 new_bus->path_id = sim->path_id; 4300 new_bus->sim = sim; 4301 ++sim->refcount; 4302 timevalclear(&new_bus->last_reset); 4303 new_bus->flags = 0; 4304 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4305 new_bus->generation = 0; 4306 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4307 old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4308 while (old_bus != NULL 4309 && old_bus->path_id < new_bus->path_id) 4310 old_bus = TAILQ_NEXT(old_bus, links); 4311 if (old_bus != NULL) 4312 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4313 else 4314 TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); 4315 xsoftc.bus_generation++; 4316 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4317 4318 /* Notify interested parties */ 4319 if (sim->path_id != CAM_XPT_PATH_ID) { 4320 struct cam_path path; 4321 4322 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4323 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4324 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4325 cpi.ccb_h.func_code = XPT_PATH_INQ; 4326 xpt_action((union ccb *)&cpi); 4327 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4328 xpt_release_path(&path); 4329 } 4330 return (CAM_SUCCESS); 4331 } 4332 4333 /* 4334 * Deregister a bus. We must clean out all transactions pending on the bus. 4335 * This routine is typically called prior to cam_sim_free() (e.g. see 4336 * dev/usbmisc/umass/umass.c) 4337 */ 4338 int32_t 4339 xpt_bus_deregister(path_id_t pathid) 4340 { 4341 struct cam_path bus_path; 4342 struct cam_ed *device; 4343 struct cam_ed_qinfo *qinfo; 4344 struct cam_devq *devq; 4345 struct cam_periph *periph; 4346 struct cam_sim *ccbsim; 4347 union ccb *work_ccb; 4348 cam_status status; 4349 4350 status = xpt_compile_path(&bus_path, NULL, pathid, 4351 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4352 if (status != CAM_REQ_CMP) 4353 return (status); 4354 4355 /* 4356 * This should clear out all pending requests and timeouts, but 4357 * the ccb's may be queued to a software interrupt. 4358 * 4359 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4360 * and it really ought to. 4361 */ 4362 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4363 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4364 4365 /* The SIM may be gone, so use a dummy SIM for any stray operations. */ 4366 devq = bus_path.bus->sim->devq; 4367 ccbsim = bus_path.bus->sim; 4368 bus_path.bus->sim = &cam_dead_sim; 4369 4370 /* Execute any pending operations now. */ 4371 while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 4372 CAMQ_HEAD)) != NULL || 4373 (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 4374 CAMQ_HEAD)) != NULL) { 4375 do { 4376 device = qinfo->device; 4377 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 4378 if (work_ccb != NULL) { 4379 devq->active_dev = device; 4380 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 4381 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 4382 (*(ccbsim->sim_action))(ccbsim, work_ccb); 4383 } 4384 4385 periph = (struct cam_periph *)camq_remove(&device->drvq, 4386 CAMQ_HEAD); 4387 if (periph != NULL) 4388 xpt_schedule(periph, periph->pinfo.priority); 4389 } while (work_ccb != NULL || periph != NULL); 4390 } 4391 4392 /* Make sure all completed CCBs are processed. */ 4393 while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { 4394 camisr_runqueue(ccbsim); 4395 4396 /* Repeat the async's for the benefit of any new devices. */ 4397 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4398 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4399 } 4400 4401 /* Release the reference count held while registered. */ 4402 xpt_release_bus(bus_path.bus); 4403 xpt_release_path(&bus_path); 4404 4405 return (CAM_REQ_CMP); 4406 } 4407 4408 static path_id_t 4409 xptnextfreepathid(void) 4410 { 4411 struct cam_eb *bus; 4412 path_id_t pathid; 4413 char *strval; 4414 4415 pathid = 0; 4416 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4417 bus = TAILQ_FIRST(&xsoftc.xpt_busses); 4418 retry: 4419 /* Find an unoccupied pathid */ 4420 while (bus != NULL && bus->path_id <= pathid) { 4421 if (bus->path_id == pathid) 4422 pathid++; 4423 bus = TAILQ_NEXT(bus, links); 4424 } 4425 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4426 4427 /* 4428 * Ensure that this pathid is not reserved for 4429 * a bus that may be registered in the future. 4430 */ 4431 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4432 ++pathid; 4433 /* Start the search over */ 4434 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4435 goto retry; 4436 } 4437 return (pathid); 4438 } 4439 4440 static path_id_t 4441 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4442 { 4443 path_id_t pathid; 4444 int i, dunit, val; 4445 char buf[32]; 4446 4447 pathid = CAM_XPT_PATH_ID; 4448 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4449 i = -1; 4450 while ((i = resource_query_string(i, "at", buf)) != -1) { 4451 if (strcmp(resource_query_name(i), "scbus")) { 4452 /* Avoid a bit of foot shooting. */ 4453 continue; 4454 } 4455 dunit = resource_query_unit(i); 4456 if (dunit < 0) /* unwired?! */ 4457 continue; 4458 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4459 if (sim_bus == val) { 4460 pathid = dunit; 4461 break; 4462 } 4463 } else if (sim_bus == 0) { 4464 /* Unspecified matches bus 0 */ 4465 pathid = dunit; 4466 break; 4467 } else { 4468 kprintf("Ambiguous scbus configuration for %s%d " 4469 "bus %d, cannot wire down. The kernel " 4470 "config entry for scbus%d should " 4471 "specify a controller bus.\n" 4472 "Scbus will be assigned dynamically.\n", 4473 sim_name, sim_unit, sim_bus, dunit); 4474 break; 4475 } 4476 } 4477 4478 if (pathid == CAM_XPT_PATH_ID) 4479 pathid = xptnextfreepathid(); 4480 return (pathid); 4481 } 4482 4483 void 4484 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4485 { 4486 struct cam_eb *bus; 4487 struct cam_et *target, *next_target; 4488 struct cam_ed *device, *next_device; 4489 4490 sim_lock_assert_owned(path->bus->sim->lock); 4491 4492 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4493 4494 /* 4495 * Most async events come from a CAM interrupt context. In 4496 * a few cases, the error recovery code at the peripheral layer, 4497 * which may run from our SWI or a process context, may signal 4498 * deferred events with a call to xpt_async. 4499 */ 4500 4501 bus = path->bus; 4502 4503 if (async_code == AC_BUS_RESET) { 4504 /* Update our notion of when the last reset occurred */ 4505 microuptime(&bus->last_reset); 4506 } 4507 4508 for (target = TAILQ_FIRST(&bus->et_entries); 4509 target != NULL; 4510 target = next_target) { 4511 4512 next_target = TAILQ_NEXT(target, links); 4513 4514 if (path->target != target 4515 && path->target->target_id != CAM_TARGET_WILDCARD 4516 && target->target_id != CAM_TARGET_WILDCARD) 4517 continue; 4518 4519 if (async_code == AC_SENT_BDR) { 4520 /* Update our notion of when the last reset occurred */ 4521 microuptime(&path->target->last_reset); 4522 } 4523 4524 for (device = TAILQ_FIRST(&target->ed_entries); 4525 device != NULL; 4526 device = next_device) { 4527 4528 next_device = TAILQ_NEXT(device, links); 4529 4530 if (path->device != device 4531 && path->device->lun_id != CAM_LUN_WILDCARD 4532 && device->lun_id != CAM_LUN_WILDCARD) 4533 continue; 4534 4535 xpt_dev_async(async_code, bus, target, 4536 device, async_arg); 4537 4538 xpt_async_bcast(&device->asyncs, async_code, 4539 path, async_arg); 4540 } 4541 } 4542 4543 /* 4544 * If this wasn't a fully wildcarded async, tell all 4545 * clients that want all async events. 4546 */ 4547 if (bus != xpt_periph->path->bus) 4548 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4549 path, async_arg); 4550 } 4551 4552 static void 4553 xpt_async_bcast(struct async_list *async_head, 4554 u_int32_t async_code, 4555 struct cam_path *path, void *async_arg) 4556 { 4557 struct async_node *cur_entry; 4558 4559 cur_entry = SLIST_FIRST(async_head); 4560 while (cur_entry != NULL) { 4561 struct async_node *next_entry; 4562 /* 4563 * Grab the next list entry before we call the current 4564 * entry's callback. This is because the callback function 4565 * can delete its async callback entry. 4566 */ 4567 next_entry = SLIST_NEXT(cur_entry, links); 4568 if ((cur_entry->event_enable & async_code) != 0) 4569 cur_entry->callback(cur_entry->callback_arg, 4570 async_code, path, 4571 async_arg); 4572 cur_entry = next_entry; 4573 } 4574 } 4575 4576 /* 4577 * Handle any per-device event notifications that require action by the XPT. 4578 */ 4579 static void 4580 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4581 struct cam_ed *device, void *async_arg) 4582 { 4583 cam_status status; 4584 struct cam_path newpath; 4585 4586 /* 4587 * We only need to handle events for real devices. 4588 */ 4589 if (target->target_id == CAM_TARGET_WILDCARD 4590 || device->lun_id == CAM_LUN_WILDCARD) 4591 return; 4592 4593 /* 4594 * We need our own path with wildcards expanded to 4595 * handle certain types of events. 4596 */ 4597 if ((async_code == AC_SENT_BDR) 4598 || (async_code == AC_BUS_RESET) 4599 || (async_code == AC_INQ_CHANGED)) 4600 status = xpt_compile_path(&newpath, NULL, 4601 bus->path_id, 4602 target->target_id, 4603 device->lun_id); 4604 else 4605 status = CAM_REQ_CMP_ERR; 4606 4607 if (status == CAM_REQ_CMP) { 4608 4609 /* 4610 * Allow transfer negotiation to occur in a 4611 * tag free environment. 4612 */ 4613 if (async_code == AC_SENT_BDR 4614 || async_code == AC_BUS_RESET) 4615 xpt_toggle_tags(&newpath); 4616 4617 if (async_code == AC_INQ_CHANGED) { 4618 /* 4619 * We've sent a start unit command, or 4620 * something similar to a device that 4621 * may have caused its inquiry data to 4622 * change. So we re-scan the device to 4623 * refresh the inquiry data for it. 4624 */ 4625 xpt_scan_lun(newpath.periph, &newpath, 4626 CAM_EXPECT_INQ_CHANGE, NULL); 4627 } 4628 xpt_release_path(&newpath); 4629 } else if (async_code == AC_LOST_DEVICE) { 4630 /* 4631 * When we lose a device the device may be about to detach 4632 * the sim, we have to clear out all pending timeouts and 4633 * requests before that happens. XXX it would be nice if 4634 * we could abort the requests pertaining to the device. 4635 */ 4636 xpt_release_devq_timeout(device); 4637 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4638 device->flags |= CAM_DEV_UNCONFIGURED; 4639 xpt_release_device(bus, target, device); 4640 } 4641 } else if (async_code == AC_TRANSFER_NEG) { 4642 struct ccb_trans_settings *settings; 4643 4644 settings = (struct ccb_trans_settings *)async_arg; 4645 xpt_set_transfer_settings(settings, device, 4646 /*async_update*/TRUE); 4647 } 4648 } 4649 4650 u_int32_t 4651 xpt_freeze_devq(struct cam_path *path, u_int count) 4652 { 4653 struct ccb_hdr *ccbh; 4654 4655 sim_lock_assert_owned(path->bus->sim->lock); 4656 4657 path->device->qfrozen_cnt += count; 4658 4659 /* 4660 * Mark the last CCB in the queue as needing 4661 * to be requeued if the driver hasn't 4662 * changed it's state yet. This fixes a race 4663 * where a ccb is just about to be queued to 4664 * a controller driver when it's interrupt routine 4665 * freezes the queue. To completly close the 4666 * hole, controller drives must check to see 4667 * if a ccb's status is still CAM_REQ_INPROG 4668 * just before they queue 4669 * the CCB. See ahc_action/ahc_freeze_devq for 4670 * an example. 4671 */ 4672 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4673 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4674 ccbh->status = CAM_REQUEUE_REQ; 4675 return (path->device->qfrozen_cnt); 4676 } 4677 4678 u_int32_t 4679 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4680 { 4681 sim_lock_assert_owned(sim->lock); 4682 4683 if (sim->devq == NULL) 4684 return(count); 4685 sim->devq->send_queue.qfrozen_cnt += count; 4686 if (sim->devq->active_dev != NULL) { 4687 struct ccb_hdr *ccbh; 4688 4689 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4690 ccb_hdr_tailq); 4691 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4692 ccbh->status = CAM_REQUEUE_REQ; 4693 } 4694 return (sim->devq->send_queue.qfrozen_cnt); 4695 } 4696 4697 /* 4698 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4699 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4700 * freed, which is not the case here), but the device queue is also freed XXX 4701 * and we have to check that here. 4702 * 4703 * XXX fixme: could we simply not null-out the device queue via 4704 * cam_sim_free()? 4705 */ 4706 static void 4707 xpt_release_devq_timeout(void *arg) 4708 { 4709 struct cam_ed *device; 4710 4711 device = (struct cam_ed *)arg; 4712 4713 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4714 } 4715 4716 void 4717 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4718 { 4719 sim_lock_assert_owned(path->bus->sim->lock); 4720 4721 xpt_release_devq_device(path->device, count, run_queue); 4722 } 4723 4724 static void 4725 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4726 { 4727 int rundevq; 4728 4729 rundevq = 0; 4730 4731 if (dev->qfrozen_cnt > 0) { 4732 4733 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4734 dev->qfrozen_cnt -= count; 4735 if (dev->qfrozen_cnt == 0) { 4736 4737 /* 4738 * No longer need to wait for a successful 4739 * command completion. 4740 */ 4741 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4742 4743 /* 4744 * Remove any timeouts that might be scheduled 4745 * to release this queue. 4746 */ 4747 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4748 callout_stop(&dev->callout); 4749 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4750 } 4751 4752 /* 4753 * Now that we are unfrozen schedule the 4754 * device so any pending transactions are 4755 * run. 4756 */ 4757 if ((dev->ccbq.queue.entries > 0) 4758 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4759 && (run_queue != 0)) { 4760 rundevq = 1; 4761 } 4762 } 4763 } 4764 if (rundevq != 0) 4765 xpt_run_dev_sendq(dev->target->bus); 4766 } 4767 4768 void 4769 xpt_release_simq(struct cam_sim *sim, int run_queue) 4770 { 4771 struct camq *sendq; 4772 4773 sim_lock_assert_owned(sim->lock); 4774 4775 if (sim->devq == NULL) 4776 return; 4777 4778 sendq = &(sim->devq->send_queue); 4779 if (sendq->qfrozen_cnt > 0) { 4780 sendq->qfrozen_cnt--; 4781 if (sendq->qfrozen_cnt == 0) { 4782 struct cam_eb *bus; 4783 4784 /* 4785 * If there is a timeout scheduled to release this 4786 * sim queue, remove it. The queue frozen count is 4787 * already at 0. 4788 */ 4789 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4790 callout_stop(&sim->callout); 4791 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4792 } 4793 bus = xpt_find_bus(sim->path_id); 4794 4795 if (run_queue) { 4796 /* 4797 * Now that we are unfrozen run the send queue. 4798 */ 4799 xpt_run_dev_sendq(bus); 4800 } 4801 xpt_release_bus(bus); 4802 } 4803 } 4804 } 4805 4806 void 4807 xpt_done(union ccb *done_ccb) 4808 { 4809 struct cam_sim *sim; 4810 4811 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4812 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4813 /* 4814 * Queue up the request for handling by our SWI handler 4815 * any of the "non-immediate" type of ccbs. 4816 */ 4817 sim = done_ccb->ccb_h.path->bus->sim; 4818 switch (done_ccb->ccb_h.path->periph->type) { 4819 case CAM_PERIPH_BIO: 4820 spin_lock_wr(&sim->sim_spin); 4821 TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, 4822 sim_links.tqe); 4823 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4824 spin_unlock_wr(&sim->sim_spin); 4825 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4826 spin_lock_wr(&cam_simq_spin); 4827 if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { 4828 TAILQ_INSERT_TAIL(&cam_simq, sim, 4829 links); 4830 sim->flags |= CAM_SIM_ON_DONEQ; 4831 } 4832 spin_unlock_wr(&cam_simq_spin); 4833 } 4834 if ((done_ccb->ccb_h.path->periph->flags & 4835 CAM_PERIPH_POLLED) == 0) 4836 setsoftcambio(); 4837 break; 4838 default: 4839 panic("unknown periph type %d", 4840 done_ccb->ccb_h.path->periph->type); 4841 } 4842 } 4843 } 4844 4845 union ccb * 4846 xpt_alloc_ccb(void) 4847 { 4848 union ccb *new_ccb; 4849 4850 new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); 4851 return (new_ccb); 4852 } 4853 4854 void 4855 xpt_free_ccb(union ccb *free_ccb) 4856 { 4857 kfree(free_ccb, M_CAMXPT); 4858 } 4859 4860 4861 4862 /* Private XPT functions */ 4863 4864 /* 4865 * Get a CAM control block for the caller. Charge the structure to the device 4866 * referenced by the path. If the this device has no 'credits' then the 4867 * device already has the maximum number of outstanding operations under way 4868 * and we return NULL. If we don't have sufficient resources to allocate more 4869 * ccbs, we also return NULL. 4870 */ 4871 static union ccb * 4872 xpt_get_ccb(struct cam_ed *device) 4873 { 4874 union ccb *new_ccb; 4875 struct cam_sim *sim; 4876 4877 sim = device->sim; 4878 if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { 4879 new_ccb = xpt_alloc_ccb(); 4880 if ((sim->flags & CAM_SIM_MPSAFE) == 0) 4881 callout_init(&new_ccb->ccb_h.timeout_ch); 4882 SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, 4883 xpt_links.sle); 4884 sim->ccb_count++; 4885 } 4886 cam_ccbq_take_opening(&device->ccbq); 4887 SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); 4888 return (new_ccb); 4889 } 4890 4891 static void 4892 xpt_release_bus(struct cam_eb *bus) 4893 { 4894 4895 if ((--bus->refcount == 0) 4896 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4897 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 4898 TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); 4899 xsoftc.bus_generation++; 4900 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 4901 kfree(bus, M_CAMXPT); 4902 } 4903 } 4904 4905 static struct cam_et * 4906 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4907 { 4908 struct cam_et *target; 4909 struct cam_et *cur_target; 4910 4911 target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); 4912 4913 TAILQ_INIT(&target->ed_entries); 4914 target->bus = bus; 4915 target->target_id = target_id; 4916 target->refcount = 1; 4917 target->generation = 0; 4918 timevalclear(&target->last_reset); 4919 /* 4920 * Hold a reference to our parent bus so it 4921 * will not go away before we do. 4922 */ 4923 bus->refcount++; 4924 4925 /* Insertion sort into our bus's target list */ 4926 cur_target = TAILQ_FIRST(&bus->et_entries); 4927 while (cur_target != NULL && cur_target->target_id < target_id) 4928 cur_target = TAILQ_NEXT(cur_target, links); 4929 4930 if (cur_target != NULL) { 4931 TAILQ_INSERT_BEFORE(cur_target, target, links); 4932 } else { 4933 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4934 } 4935 bus->generation++; 4936 return (target); 4937 } 4938 4939 static void 4940 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4941 { 4942 if (target->refcount == 1) { 4943 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 4944 TAILQ_REMOVE(&bus->et_entries, target, links); 4945 bus->generation++; 4946 xpt_release_bus(bus); 4947 KKASSERT(target->refcount == 1); 4948 kfree(target, M_CAMXPT); 4949 } else { 4950 --target->refcount; 4951 } 4952 } 4953 4954 static struct cam_ed * 4955 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4956 { 4957 struct cam_path path; 4958 struct cam_ed *device; 4959 struct cam_devq *devq; 4960 cam_status status; 4961 4962 if (SIM_DEAD(bus->sim)) 4963 return (NULL); 4964 4965 /* Make space for us in the device queue on our bus */ 4966 if (bus->sim->devq == NULL) 4967 return(NULL); 4968 devq = bus->sim->devq; 4969 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4970 4971 if (status != CAM_REQ_CMP) { 4972 device = NULL; 4973 } else { 4974 device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); 4975 } 4976 4977 if (device != NULL) { 4978 struct cam_ed *cur_device; 4979 4980 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4981 device->alloc_ccb_entry.device = device; 4982 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4983 device->send_ccb_entry.device = device; 4984 device->target = target; 4985 device->lun_id = lun_id; 4986 device->sim = bus->sim; 4987 /* Initialize our queues */ 4988 if (camq_init(&device->drvq, 0) != 0) { 4989 kfree(device, M_CAMXPT); 4990 return (NULL); 4991 } 4992 if (cam_ccbq_init(&device->ccbq, 4993 bus->sim->max_dev_openings) != 0) { 4994 camq_fini(&device->drvq); 4995 kfree(device, M_CAMXPT); 4996 return (NULL); 4997 } 4998 SLIST_INIT(&device->asyncs); 4999 SLIST_INIT(&device->periphs); 5000 device->generation = 0; 5001 device->owner = NULL; 5002 /* 5003 * Take the default quirk entry until we have inquiry 5004 * data and can determine a better quirk to use. 5005 */ 5006 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 5007 bzero(&device->inq_data, sizeof(device->inq_data)); 5008 device->inq_flags = 0; 5009 device->queue_flags = 0; 5010 device->serial_num = NULL; 5011 device->serial_num_len = 0; 5012 device->qfrozen_cnt = 0; 5013 device->flags = CAM_DEV_UNCONFIGURED; 5014 device->tag_delay_count = 0; 5015 device->tag_saved_openings = 0; 5016 device->refcount = 1; 5017 callout_init(&device->callout); 5018 5019 /* 5020 * Hold a reference to our parent target so it 5021 * will not go away before we do. 5022 */ 5023 target->refcount++; 5024 5025 /* 5026 * XXX should be limited by number of CCBs this bus can 5027 * do. 5028 */ 5029 bus->sim->max_ccbs += device->ccbq.devq_openings; 5030 /* Insertion sort into our target's device list */ 5031 cur_device = TAILQ_FIRST(&target->ed_entries); 5032 while (cur_device != NULL && cur_device->lun_id < lun_id) 5033 cur_device = TAILQ_NEXT(cur_device, links); 5034 if (cur_device != NULL) { 5035 TAILQ_INSERT_BEFORE(cur_device, device, links); 5036 } else { 5037 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 5038 } 5039 target->generation++; 5040 if (lun_id != CAM_LUN_WILDCARD) { 5041 xpt_compile_path(&path, 5042 NULL, 5043 bus->path_id, 5044 target->target_id, 5045 lun_id); 5046 xpt_devise_transport(&path); 5047 xpt_release_path(&path); 5048 } 5049 } 5050 return (device); 5051 } 5052 5053 static void 5054 xpt_reference_device(struct cam_ed *device) 5055 { 5056 ++device->refcount; 5057 } 5058 5059 static void 5060 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 5061 struct cam_ed *device) 5062 { 5063 struct cam_devq *devq; 5064 5065 if (device->refcount == 1) { 5066 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 5067 5068 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 5069 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 5070 panic("Removing device while still queued for ccbs"); 5071 5072 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 5073 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 5074 callout_stop(&device->callout); 5075 } 5076 5077 TAILQ_REMOVE(&target->ed_entries, device,links); 5078 target->generation++; 5079 bus->sim->max_ccbs -= device->ccbq.devq_openings; 5080 if (!SIM_DEAD(bus->sim)) { 5081 /* Release our slot in the devq */ 5082 devq = bus->sim->devq; 5083 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 5084 } 5085 camq_fini(&device->drvq); 5086 camq_fini(&device->ccbq.queue); 5087 xpt_release_target(bus, target); 5088 KKASSERT(device->refcount == 1); 5089 kfree(device, M_CAMXPT); 5090 } else { 5091 --device->refcount; 5092 } 5093 } 5094 5095 static u_int32_t 5096 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 5097 { 5098 int diff; 5099 int result; 5100 struct cam_ed *dev; 5101 5102 dev = path->device; 5103 5104 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 5105 result = cam_ccbq_resize(&dev->ccbq, newopenings); 5106 if (result == CAM_REQ_CMP && (diff < 0)) { 5107 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 5108 } 5109 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5110 || (dev->inq_flags & SID_CmdQue) != 0) 5111 dev->tag_saved_openings = newopenings; 5112 /* Adjust the global limit */ 5113 dev->sim->max_ccbs += diff; 5114 return (result); 5115 } 5116 5117 static struct cam_eb * 5118 xpt_find_bus(path_id_t path_id) 5119 { 5120 struct cam_eb *bus; 5121 5122 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 5123 TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { 5124 if (bus->path_id == path_id) { 5125 bus->refcount++; 5126 break; 5127 } 5128 } 5129 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 5130 return (bus); 5131 } 5132 5133 static struct cam_et * 5134 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 5135 { 5136 struct cam_et *target; 5137 5138 TAILQ_FOREACH(target, &bus->et_entries, links) { 5139 if (target->target_id == target_id) { 5140 target->refcount++; 5141 break; 5142 } 5143 } 5144 return (target); 5145 } 5146 5147 static struct cam_ed * 5148 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 5149 { 5150 struct cam_ed *device; 5151 5152 TAILQ_FOREACH(device, &target->ed_entries, links) { 5153 if (device->lun_id == lun_id) { 5154 device->refcount++; 5155 break; 5156 } 5157 } 5158 return (device); 5159 } 5160 5161 typedef struct { 5162 union ccb *request_ccb; 5163 struct ccb_pathinq *cpi; 5164 int counter; 5165 } xpt_scan_bus_info; 5166 5167 /* 5168 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5169 * As the scan progresses, xpt_scan_bus is used as the 5170 * callback on completion function. 5171 */ 5172 static void 5173 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5174 { 5175 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5176 ("xpt_scan_bus\n")); 5177 switch (request_ccb->ccb_h.func_code) { 5178 case XPT_SCAN_BUS: 5179 { 5180 xpt_scan_bus_info *scan_info; 5181 union ccb *work_ccb; 5182 struct cam_path *path; 5183 u_int i; 5184 u_int max_target; 5185 u_int initiator_id; 5186 5187 /* Find out the characteristics of the bus */ 5188 work_ccb = xpt_alloc_ccb(); 5189 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5190 request_ccb->ccb_h.pinfo.priority); 5191 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5192 xpt_action(work_ccb); 5193 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5194 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5195 xpt_free_ccb(work_ccb); 5196 xpt_done(request_ccb); 5197 return; 5198 } 5199 5200 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5201 /* 5202 * Can't scan the bus on an adapter that 5203 * cannot perform the initiator role. 5204 */ 5205 request_ccb->ccb_h.status = CAM_REQ_CMP; 5206 xpt_free_ccb(work_ccb); 5207 xpt_done(request_ccb); 5208 return; 5209 } 5210 5211 /* Save some state for use while we probe for devices */ 5212 scan_info = (xpt_scan_bus_info *) 5213 kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); 5214 scan_info->request_ccb = request_ccb; 5215 scan_info->cpi = &work_ccb->cpi; 5216 5217 /* Cache on our stack so we can work asynchronously */ 5218 max_target = scan_info->cpi->max_target; 5219 initiator_id = scan_info->cpi->initiator_id; 5220 5221 5222 /* 5223 * We can scan all targets in parallel, or do it sequentially. 5224 */ 5225 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5226 max_target = 0; 5227 scan_info->counter = 0; 5228 } else { 5229 scan_info->counter = scan_info->cpi->max_target + 1; 5230 if (scan_info->cpi->initiator_id < scan_info->counter) { 5231 scan_info->counter--; 5232 } 5233 } 5234 5235 for (i = 0; i <= max_target; i++) { 5236 cam_status status; 5237 if (i == initiator_id) 5238 continue; 5239 5240 status = xpt_create_path(&path, xpt_periph, 5241 request_ccb->ccb_h.path_id, 5242 i, 0); 5243 if (status != CAM_REQ_CMP) { 5244 kprintf("xpt_scan_bus: xpt_create_path failed" 5245 " with status %#x, bus scan halted\n", 5246 status); 5247 kfree(scan_info, M_CAMXPT); 5248 request_ccb->ccb_h.status = status; 5249 xpt_free_ccb(work_ccb); 5250 xpt_done(request_ccb); 5251 break; 5252 } 5253 work_ccb = xpt_alloc_ccb(); 5254 xpt_setup_ccb(&work_ccb->ccb_h, path, 5255 request_ccb->ccb_h.pinfo.priority); 5256 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5257 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5258 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5259 work_ccb->crcn.flags = request_ccb->crcn.flags; 5260 xpt_action(work_ccb); 5261 } 5262 break; 5263 } 5264 case XPT_SCAN_LUN: 5265 { 5266 cam_status status; 5267 struct cam_path *path; 5268 xpt_scan_bus_info *scan_info; 5269 path_id_t path_id; 5270 target_id_t target_id; 5271 lun_id_t lun_id; 5272 5273 /* Reuse the same CCB to query if a device was really found */ 5274 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5275 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5276 request_ccb->ccb_h.pinfo.priority); 5277 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5278 5279 path_id = request_ccb->ccb_h.path_id; 5280 target_id = request_ccb->ccb_h.target_id; 5281 lun_id = request_ccb->ccb_h.target_lun; 5282 xpt_action(request_ccb); 5283 5284 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5285 struct cam_ed *device; 5286 struct cam_et *target; 5287 int phl; 5288 5289 /* 5290 * If we already probed lun 0 successfully, or 5291 * we have additional configured luns on this 5292 * target that might have "gone away", go onto 5293 * the next lun. 5294 */ 5295 target = request_ccb->ccb_h.path->target; 5296 /* 5297 * We may touch devices that we don't 5298 * hold references too, so ensure they 5299 * don't disappear out from under us. 5300 * The target above is referenced by the 5301 * path in the request ccb. 5302 */ 5303 phl = 0; 5304 device = TAILQ_FIRST(&target->ed_entries); 5305 if (device != NULL) { 5306 phl = CAN_SRCH_HI_SPARSE(device); 5307 if (device->lun_id == 0) 5308 device = TAILQ_NEXT(device, links); 5309 } 5310 if ((lun_id != 0) || (device != NULL)) { 5311 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5312 lun_id++; 5313 } 5314 } else { 5315 struct cam_ed *device; 5316 5317 device = request_ccb->ccb_h.path->device; 5318 5319 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5320 /* Try the next lun */ 5321 if (lun_id < (CAM_SCSI2_MAXLUN-1) 5322 || CAN_SRCH_HI_DENSE(device)) 5323 lun_id++; 5324 } 5325 } 5326 5327 /* 5328 * Free the current request path- we're done with it. 5329 */ 5330 xpt_free_path(request_ccb->ccb_h.path); 5331 5332 /* 5333 * Check to see if we scan any further luns. 5334 */ 5335 if (lun_id == request_ccb->ccb_h.target_lun 5336 || lun_id > scan_info->cpi->max_lun) { 5337 int done; 5338 5339 hop_again: 5340 done = 0; 5341 if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { 5342 scan_info->counter++; 5343 if (scan_info->counter == 5344 scan_info->cpi->initiator_id) { 5345 scan_info->counter++; 5346 } 5347 if (scan_info->counter >= 5348 scan_info->cpi->max_target+1) { 5349 done = 1; 5350 } 5351 } else { 5352 scan_info->counter--; 5353 if (scan_info->counter == 0) { 5354 done = 1; 5355 } 5356 } 5357 if (done) { 5358 xpt_free_ccb(request_ccb); 5359 xpt_free_ccb((union ccb *)scan_info->cpi); 5360 request_ccb = scan_info->request_ccb; 5361 kfree(scan_info, M_CAMXPT); 5362 request_ccb->ccb_h.status = CAM_REQ_CMP; 5363 xpt_done(request_ccb); 5364 break; 5365 } 5366 5367 if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { 5368 break; 5369 } 5370 status = xpt_create_path(&path, xpt_periph, 5371 scan_info->request_ccb->ccb_h.path_id, 5372 scan_info->counter, 0); 5373 if (status != CAM_REQ_CMP) { 5374 kprintf("xpt_scan_bus: xpt_create_path failed" 5375 " with status %#x, bus scan halted\n", 5376 status); 5377 xpt_free_ccb(request_ccb); 5378 xpt_free_ccb((union ccb *)scan_info->cpi); 5379 request_ccb = scan_info->request_ccb; 5380 kfree(scan_info, M_CAMXPT); 5381 request_ccb->ccb_h.status = status; 5382 xpt_done(request_ccb); 5383 break; 5384 } 5385 xpt_setup_ccb(&request_ccb->ccb_h, path, 5386 request_ccb->ccb_h.pinfo.priority); 5387 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5388 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5389 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5390 request_ccb->crcn.flags = 5391 scan_info->request_ccb->crcn.flags; 5392 } else { 5393 status = xpt_create_path(&path, xpt_periph, 5394 path_id, target_id, lun_id); 5395 if (status != CAM_REQ_CMP) { 5396 kprintf("xpt_scan_bus: xpt_create_path failed " 5397 "with status %#x, halting LUN scan\n", 5398 status); 5399 goto hop_again; 5400 } 5401 xpt_setup_ccb(&request_ccb->ccb_h, path, 5402 request_ccb->ccb_h.pinfo.priority); 5403 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5404 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5405 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5406 request_ccb->crcn.flags = 5407 scan_info->request_ccb->crcn.flags; 5408 } 5409 xpt_action(request_ccb); 5410 break; 5411 } 5412 default: 5413 break; 5414 } 5415 } 5416 5417 typedef enum { 5418 PROBE_TUR, 5419 PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ 5420 PROBE_FULL_INQUIRY, 5421 PROBE_MODE_SENSE, 5422 PROBE_SERIAL_NUM_0, 5423 PROBE_SERIAL_NUM_1, 5424 PROBE_TUR_FOR_NEGOTIATION, 5425 PROBE_INQUIRY_BASIC_DV1, 5426 PROBE_INQUIRY_BASIC_DV2, 5427 PROBE_DV_EXIT 5428 } probe_action; 5429 5430 typedef enum { 5431 PROBE_INQUIRY_CKSUM = 0x01, 5432 PROBE_SERIAL_CKSUM = 0x02, 5433 PROBE_NO_ANNOUNCE = 0x04 5434 } probe_flags; 5435 5436 typedef struct { 5437 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5438 probe_action action; 5439 union ccb saved_ccb; 5440 probe_flags flags; 5441 MD5_CTX context; 5442 u_int8_t digest[16]; 5443 } probe_softc; 5444 5445 static void 5446 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5447 cam_flags flags, union ccb *request_ccb) 5448 { 5449 struct ccb_pathinq cpi; 5450 cam_status status; 5451 struct cam_path *new_path; 5452 struct cam_periph *old_periph; 5453 5454 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5455 ("xpt_scan_lun\n")); 5456 5457 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5458 cpi.ccb_h.func_code = XPT_PATH_INQ; 5459 xpt_action((union ccb *)&cpi); 5460 5461 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5462 if (request_ccb != NULL) { 5463 request_ccb->ccb_h.status = cpi.ccb_h.status; 5464 xpt_done(request_ccb); 5465 } 5466 return; 5467 } 5468 5469 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5470 /* 5471 * Can't scan the bus on an adapter that 5472 * cannot perform the initiator role. 5473 */ 5474 if (request_ccb != NULL) { 5475 request_ccb->ccb_h.status = CAM_REQ_CMP; 5476 xpt_done(request_ccb); 5477 } 5478 return; 5479 } 5480 5481 if (request_ccb == NULL) { 5482 request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); 5483 new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); 5484 status = xpt_compile_path(new_path, xpt_periph, 5485 path->bus->path_id, 5486 path->target->target_id, 5487 path->device->lun_id); 5488 5489 if (status != CAM_REQ_CMP) { 5490 xpt_print(path, "xpt_scan_lun: can't compile path, " 5491 "can't continue\n"); 5492 kfree(request_ccb, M_CAMXPT); 5493 kfree(new_path, M_CAMXPT); 5494 return; 5495 } 5496 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5497 request_ccb->ccb_h.cbfcnp = xptscandone; 5498 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5499 request_ccb->crcn.flags = flags; 5500 } 5501 5502 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5503 probe_softc *softc; 5504 5505 softc = (probe_softc *)old_periph->softc; 5506 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5507 periph_links.tqe); 5508 } else { 5509 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5510 probestart, "probe", 5511 CAM_PERIPH_BIO, 5512 request_ccb->ccb_h.path, NULL, 0, 5513 request_ccb); 5514 5515 if (status != CAM_REQ_CMP) { 5516 xpt_print(path, "xpt_scan_lun: cam_alloc_periph " 5517 "returned an error, can't continue probe\n"); 5518 request_ccb->ccb_h.status = status; 5519 xpt_done(request_ccb); 5520 } 5521 } 5522 } 5523 5524 static void 5525 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5526 { 5527 xpt_release_path(done_ccb->ccb_h.path); 5528 kfree(done_ccb->ccb_h.path, M_CAMXPT); 5529 kfree(done_ccb, M_CAMXPT); 5530 } 5531 5532 static cam_status 5533 proberegister(struct cam_periph *periph, void *arg) 5534 { 5535 union ccb *request_ccb; /* CCB representing the probe request */ 5536 cam_status status; 5537 probe_softc *softc; 5538 5539 request_ccb = (union ccb *)arg; 5540 if (periph == NULL) { 5541 kprintf("proberegister: periph was NULL!!\n"); 5542 return(CAM_REQ_CMP_ERR); 5543 } 5544 5545 if (request_ccb == NULL) { 5546 kprintf("proberegister: no probe CCB, " 5547 "can't register device\n"); 5548 return(CAM_REQ_CMP_ERR); 5549 } 5550 5551 softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); 5552 TAILQ_INIT(&softc->request_ccbs); 5553 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5554 periph_links.tqe); 5555 softc->flags = 0; 5556 periph->softc = softc; 5557 status = cam_periph_acquire(periph); 5558 if (status != CAM_REQ_CMP) { 5559 return (status); 5560 } 5561 5562 5563 /* 5564 * Ensure we've waited at least a bus settle 5565 * delay before attempting to probe the device. 5566 * For HBAs that don't do bus resets, this won't make a difference. 5567 */ 5568 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5569 scsi_delay); 5570 probeschedule(periph); 5571 return(CAM_REQ_CMP); 5572 } 5573 5574 static void 5575 probeschedule(struct cam_periph *periph) 5576 { 5577 struct ccb_pathinq cpi; 5578 union ccb *ccb; 5579 probe_softc *softc; 5580 5581 softc = (probe_softc *)periph->softc; 5582 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5583 5584 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5585 cpi.ccb_h.func_code = XPT_PATH_INQ; 5586 xpt_action((union ccb *)&cpi); 5587 5588 /* 5589 * If a device has gone away and another device, or the same one, 5590 * is back in the same place, it should have a unit attention 5591 * condition pending. It will not report the unit attention in 5592 * response to an inquiry, which may leave invalid transfer 5593 * negotiations in effect. The TUR will reveal the unit attention 5594 * condition. Only send the TUR for lun 0, since some devices 5595 * will get confused by commands other than inquiry to non-existent 5596 * luns. If you think a device has gone away start your scan from 5597 * lun 0. This will insure that any bogus transfer settings are 5598 * invalidated. 5599 * 5600 * If we haven't seen the device before and the controller supports 5601 * some kind of transfer negotiation, negotiate with the first 5602 * sent command if no bus reset was performed at startup. This 5603 * ensures that the device is not confused by transfer negotiation 5604 * settings left over by loader or BIOS action. 5605 */ 5606 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5607 && (ccb->ccb_h.target_lun == 0)) { 5608 softc->action = PROBE_TUR; 5609 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5610 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5611 proberequestdefaultnegotiation(periph); 5612 softc->action = PROBE_INQUIRY; 5613 } else { 5614 softc->action = PROBE_INQUIRY; 5615 } 5616 5617 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5618 softc->flags |= PROBE_NO_ANNOUNCE; 5619 else 5620 softc->flags &= ~PROBE_NO_ANNOUNCE; 5621 5622 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5623 } 5624 5625 static void 5626 probestart(struct cam_periph *periph, union ccb *start_ccb) 5627 { 5628 /* Probe the device that our peripheral driver points to */ 5629 struct ccb_scsiio *csio; 5630 probe_softc *softc; 5631 5632 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5633 5634 softc = (probe_softc *)periph->softc; 5635 csio = &start_ccb->csio; 5636 5637 switch (softc->action) { 5638 case PROBE_TUR: 5639 case PROBE_TUR_FOR_NEGOTIATION: 5640 case PROBE_DV_EXIT: 5641 { 5642 scsi_test_unit_ready(csio, 5643 /*retries*/4, 5644 probedone, 5645 MSG_SIMPLE_Q_TAG, 5646 SSD_FULL_SIZE, 5647 /*timeout*/60000); 5648 break; 5649 } 5650 case PROBE_INQUIRY: 5651 case PROBE_FULL_INQUIRY: 5652 case PROBE_INQUIRY_BASIC_DV1: 5653 case PROBE_INQUIRY_BASIC_DV2: 5654 { 5655 u_int inquiry_len; 5656 struct scsi_inquiry_data *inq_buf; 5657 5658 inq_buf = &periph->path->device->inq_data; 5659 5660 /* 5661 * If the device is currently configured, we calculate an 5662 * MD5 checksum of the inquiry data, and if the serial number 5663 * length is greater than 0, add the serial number data 5664 * into the checksum as well. Once the inquiry and the 5665 * serial number check finish, we attempt to figure out 5666 * whether we still have the same device. 5667 */ 5668 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5669 5670 MD5Init(&softc->context); 5671 MD5Update(&softc->context, (unsigned char *)inq_buf, 5672 sizeof(struct scsi_inquiry_data)); 5673 softc->flags |= PROBE_INQUIRY_CKSUM; 5674 if (periph->path->device->serial_num_len > 0) { 5675 MD5Update(&softc->context, 5676 periph->path->device->serial_num, 5677 periph->path->device->serial_num_len); 5678 softc->flags |= PROBE_SERIAL_CKSUM; 5679 } 5680 MD5Final(softc->digest, &softc->context); 5681 } 5682 5683 if (softc->action == PROBE_INQUIRY) 5684 inquiry_len = SHORT_INQUIRY_LENGTH; 5685 else 5686 inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); 5687 5688 /* 5689 * Some parallel SCSI devices fail to send an 5690 * ignore wide residue message when dealing with 5691 * odd length inquiry requests. Round up to be 5692 * safe. 5693 */ 5694 inquiry_len = roundup2(inquiry_len, 2); 5695 5696 if (softc->action == PROBE_INQUIRY_BASIC_DV1 5697 || softc->action == PROBE_INQUIRY_BASIC_DV2) { 5698 inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); 5699 } 5700 scsi_inquiry(csio, 5701 /*retries*/4, 5702 probedone, 5703 MSG_SIMPLE_Q_TAG, 5704 (u_int8_t *)inq_buf, 5705 inquiry_len, 5706 /*evpd*/FALSE, 5707 /*page_code*/0, 5708 SSD_MIN_SIZE, 5709 /*timeout*/60 * 1000); 5710 break; 5711 } 5712 case PROBE_MODE_SENSE: 5713 { 5714 void *mode_buf; 5715 int mode_buf_len; 5716 5717 mode_buf_len = sizeof(struct scsi_mode_header_6) 5718 + sizeof(struct scsi_mode_blk_desc) 5719 + sizeof(struct scsi_control_page); 5720 mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); 5721 scsi_mode_sense(csio, 5722 /*retries*/4, 5723 probedone, 5724 MSG_SIMPLE_Q_TAG, 5725 /*dbd*/FALSE, 5726 SMS_PAGE_CTRL_CURRENT, 5727 SMS_CONTROL_MODE_PAGE, 5728 mode_buf, 5729 mode_buf_len, 5730 SSD_FULL_SIZE, 5731 /*timeout*/60000); 5732 break; 5733 } 5734 case PROBE_SERIAL_NUM_0: 5735 { 5736 struct scsi_vpd_supported_page_list *vpd_list = NULL; 5737 struct cam_ed *device; 5738 5739 device = periph->path->device; 5740 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5741 vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, 5742 M_INTWAIT | M_ZERO); 5743 } 5744 5745 if (vpd_list != NULL) { 5746 scsi_inquiry(csio, 5747 /*retries*/4, 5748 probedone, 5749 MSG_SIMPLE_Q_TAG, 5750 (u_int8_t *)vpd_list, 5751 sizeof(*vpd_list), 5752 /*evpd*/TRUE, 5753 SVPD_SUPPORTED_PAGE_LIST, 5754 SSD_MIN_SIZE, 5755 /*timeout*/60 * 1000); 5756 break; 5757 } 5758 /* 5759 * We'll have to do without, let our probedone 5760 * routine finish up for us. 5761 */ 5762 start_ccb->csio.data_ptr = NULL; 5763 probedone(periph, start_ccb); 5764 return; 5765 } 5766 case PROBE_SERIAL_NUM_1: 5767 { 5768 struct scsi_vpd_unit_serial_number *serial_buf; 5769 struct cam_ed* device; 5770 5771 serial_buf = NULL; 5772 device = periph->path->device; 5773 device->serial_num = NULL; 5774 device->serial_num_len = 0; 5775 5776 serial_buf = (struct scsi_vpd_unit_serial_number *) 5777 kmalloc(sizeof(*serial_buf), M_CAMXPT, 5778 M_INTWAIT | M_ZERO); 5779 scsi_inquiry(csio, 5780 /*retries*/4, 5781 probedone, 5782 MSG_SIMPLE_Q_TAG, 5783 (u_int8_t *)serial_buf, 5784 sizeof(*serial_buf), 5785 /*evpd*/TRUE, 5786 SVPD_UNIT_SERIAL_NUMBER, 5787 SSD_MIN_SIZE, 5788 /*timeout*/60 * 1000); 5789 break; 5790 } 5791 } 5792 xpt_action(start_ccb); 5793 } 5794 5795 static void 5796 proberequestdefaultnegotiation(struct cam_periph *periph) 5797 { 5798 struct ccb_trans_settings cts; 5799 5800 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5801 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5802 cts.type = CTS_TYPE_USER_SETTINGS; 5803 xpt_action((union ccb *)&cts); 5804 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5805 return; 5806 } 5807 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5808 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5809 xpt_action((union ccb *)&cts); 5810 } 5811 5812 /* 5813 * Backoff Negotiation Code- only pertinent for SPI devices. 5814 */ 5815 static int 5816 proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) 5817 { 5818 struct ccb_trans_settings cts; 5819 struct ccb_trans_settings_spi *spi; 5820 5821 memset(&cts, 0, sizeof (cts)); 5822 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5823 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5824 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5825 xpt_action((union ccb *)&cts); 5826 if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5827 if (bootverbose) { 5828 xpt_print(periph->path, 5829 "failed to get current device settings\n"); 5830 } 5831 return (0); 5832 } 5833 if (cts.transport != XPORT_SPI) { 5834 if (bootverbose) { 5835 xpt_print(periph->path, "not SPI transport\n"); 5836 } 5837 return (0); 5838 } 5839 spi = &cts.xport_specific.spi; 5840 5841 /* 5842 * We cannot renegotiate sync rate if we don't have one. 5843 */ 5844 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { 5845 if (bootverbose) { 5846 xpt_print(periph->path, "no sync rate known\n"); 5847 } 5848 return (0); 5849 } 5850 5851 /* 5852 * We'll assert that we don't have to touch PPR options- the 5853 * SIM will see what we do with period and offset and adjust 5854 * the PPR options as appropriate. 5855 */ 5856 5857 /* 5858 * A sync rate with unknown or zero offset is nonsensical. 5859 * A sync period of zero means Async. 5860 */ 5861 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 5862 || spi->sync_offset == 0 || spi->sync_period == 0) { 5863 if (bootverbose) { 5864 xpt_print(periph->path, "no sync rate available\n"); 5865 } 5866 return (0); 5867 } 5868 5869 if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { 5870 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5871 ("hit async: giving up on DV\n")); 5872 return (0); 5873 } 5874 5875 5876 /* 5877 * Jump sync_period up by one, but stop at 5MHz and fall back to Async. 5878 * We don't try to remember 'last' settings to see if the SIM actually 5879 * gets into the speed we want to set. We check on the SIM telling 5880 * us that a requested speed is bad, but otherwise don't try and 5881 * check the speed due to the asynchronous and handshake nature 5882 * of speed setting. 5883 */ 5884 spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; 5885 for (;;) { 5886 spi->sync_period++; 5887 if (spi->sync_period >= 0xf) { 5888 spi->sync_period = 0; 5889 spi->sync_offset = 0; 5890 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5891 ("setting to async for DV\n")); 5892 /* 5893 * Once we hit async, we don't want to try 5894 * any more settings. 5895 */ 5896 device->flags |= CAM_DEV_DV_HIT_BOTTOM; 5897 } else if (bootverbose) { 5898 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5899 ("DV: period 0x%x\n", spi->sync_period)); 5900 kprintf("setting period to 0x%x\n", spi->sync_period); 5901 } 5902 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5903 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5904 xpt_action((union ccb *)&cts); 5905 if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5906 break; 5907 } 5908 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 5909 ("DV: failed to set period 0x%x\n", spi->sync_period)); 5910 if (spi->sync_period == 0) { 5911 return (0); 5912 } 5913 } 5914 return (1); 5915 } 5916 5917 static void 5918 probedone(struct cam_periph *periph, union ccb *done_ccb) 5919 { 5920 probe_softc *softc; 5921 struct cam_path *path; 5922 u_int32_t priority; 5923 5924 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5925 5926 softc = (probe_softc *)periph->softc; 5927 path = done_ccb->ccb_h.path; 5928 priority = done_ccb->ccb_h.pinfo.priority; 5929 5930 switch (softc->action) { 5931 case PROBE_TUR: 5932 { 5933 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5934 5935 if (cam_periph_error(done_ccb, 0, 5936 SF_NO_PRINT, NULL) == ERESTART) 5937 return; 5938 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5939 /* Don't wedge the queue */ 5940 xpt_release_devq(done_ccb->ccb_h.path, 5941 /*count*/1, 5942 /*run_queue*/TRUE); 5943 } 5944 softc->action = PROBE_INQUIRY; 5945 xpt_release_ccb(done_ccb); 5946 xpt_schedule(periph, priority); 5947 return; 5948 } 5949 case PROBE_INQUIRY: 5950 case PROBE_FULL_INQUIRY: 5951 { 5952 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5953 struct scsi_inquiry_data *inq_buf; 5954 u_int8_t periph_qual; 5955 5956 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5957 inq_buf = &path->device->inq_data; 5958 5959 periph_qual = SID_QUAL(inq_buf); 5960 5961 switch(periph_qual) { 5962 case SID_QUAL_LU_CONNECTED: 5963 { 5964 u_int8_t len; 5965 5966 /* 5967 * We conservatively request only 5968 * SHORT_INQUIRY_LEN bytes of inquiry 5969 * information during our first try 5970 * at sending an INQUIRY. If the device 5971 * has more information to give, 5972 * perform a second request specifying 5973 * the amount of information the device 5974 * is willing to give. 5975 */ 5976 len = inq_buf->additional_length 5977 + offsetof(struct scsi_inquiry_data, 5978 additional_length) + 1; 5979 if (softc->action == PROBE_INQUIRY 5980 && len > SHORT_INQUIRY_LENGTH) { 5981 softc->action = PROBE_FULL_INQUIRY; 5982 xpt_release_ccb(done_ccb); 5983 xpt_schedule(periph, priority); 5984 return; 5985 } 5986 5987 xpt_find_quirk(path->device); 5988 5989 xpt_devise_transport(path); 5990 if (INQ_DATA_TQ_ENABLED(inq_buf)) 5991 softc->action = PROBE_MODE_SENSE; 5992 else 5993 softc->action = PROBE_SERIAL_NUM_0; 5994 5995 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5996 xpt_reference_device(path->device); 5997 5998 xpt_release_ccb(done_ccb); 5999 xpt_schedule(periph, priority); 6000 return; 6001 } 6002 default: 6003 break; 6004 } 6005 } else if (cam_periph_error(done_ccb, 0, 6006 done_ccb->ccb_h.target_lun > 0 6007 ? SF_RETRY_UA|SF_QUIET_IR 6008 : SF_RETRY_UA, 6009 &softc->saved_ccb) == ERESTART) { 6010 return; 6011 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6012 /* Don't wedge the queue */ 6013 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6014 /*run_queue*/TRUE); 6015 } 6016 /* 6017 * If we get to this point, we got an error status back 6018 * from the inquiry and the error status doesn't require 6019 * automatically retrying the command. Therefore, the 6020 * inquiry failed. If we had inquiry information before 6021 * for this device, but this latest inquiry command failed, 6022 * the device has probably gone away. If this device isn't 6023 * already marked unconfigured, notify the peripheral 6024 * drivers that this device is no more. 6025 */ 6026 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 6027 /* Send the async notification. */ 6028 xpt_async(AC_LOST_DEVICE, path, NULL); 6029 } 6030 6031 xpt_release_ccb(done_ccb); 6032 break; 6033 } 6034 case PROBE_MODE_SENSE: 6035 { 6036 struct ccb_scsiio *csio; 6037 struct scsi_mode_header_6 *mode_hdr; 6038 6039 csio = &done_ccb->csio; 6040 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 6041 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 6042 struct scsi_control_page *page; 6043 u_int8_t *offset; 6044 6045 offset = ((u_int8_t *)&mode_hdr[1]) 6046 + mode_hdr->blk_desc_len; 6047 page = (struct scsi_control_page *)offset; 6048 path->device->queue_flags = page->queue_flags; 6049 } else if (cam_periph_error(done_ccb, 0, 6050 SF_RETRY_UA|SF_NO_PRINT, 6051 &softc->saved_ccb) == ERESTART) { 6052 return; 6053 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6054 /* Don't wedge the queue */ 6055 xpt_release_devq(done_ccb->ccb_h.path, 6056 /*count*/1, /*run_queue*/TRUE); 6057 } 6058 xpt_release_ccb(done_ccb); 6059 kfree(mode_hdr, M_CAMXPT); 6060 softc->action = PROBE_SERIAL_NUM_0; 6061 xpt_schedule(periph, priority); 6062 return; 6063 } 6064 case PROBE_SERIAL_NUM_0: 6065 { 6066 struct ccb_scsiio *csio; 6067 struct scsi_vpd_supported_page_list *page_list; 6068 int length, serialnum_supported, i; 6069 6070 serialnum_supported = 0; 6071 csio = &done_ccb->csio; 6072 page_list = 6073 (struct scsi_vpd_supported_page_list *)csio->data_ptr; 6074 6075 if (page_list == NULL) { 6076 /* 6077 * Don't process the command as it was never sent 6078 */ 6079 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6080 && (page_list->length > 0)) { 6081 length = min(page_list->length, 6082 SVPD_SUPPORTED_PAGES_SIZE); 6083 for (i = 0; i < length; i++) { 6084 if (page_list->list[i] == 6085 SVPD_UNIT_SERIAL_NUMBER) { 6086 serialnum_supported = 1; 6087 break; 6088 } 6089 } 6090 } else if (cam_periph_error(done_ccb, 0, 6091 SF_RETRY_UA|SF_NO_PRINT, 6092 &softc->saved_ccb) == ERESTART) { 6093 return; 6094 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6095 /* Don't wedge the queue */ 6096 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6097 /*run_queue*/TRUE); 6098 } 6099 6100 if (page_list != NULL) 6101 kfree(page_list, M_DEVBUF); 6102 6103 if (serialnum_supported) { 6104 xpt_release_ccb(done_ccb); 6105 softc->action = PROBE_SERIAL_NUM_1; 6106 xpt_schedule(periph, priority); 6107 return; 6108 } 6109 xpt_release_ccb(done_ccb); 6110 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6111 xpt_schedule(periph, done_ccb->ccb_h.pinfo.priority); 6112 return; 6113 } 6114 6115 case PROBE_SERIAL_NUM_1: 6116 { 6117 struct ccb_scsiio *csio; 6118 struct scsi_vpd_unit_serial_number *serial_buf; 6119 u_int32_t priority; 6120 int changed; 6121 int have_serialnum; 6122 6123 changed = 1; 6124 have_serialnum = 0; 6125 csio = &done_ccb->csio; 6126 priority = done_ccb->ccb_h.pinfo.priority; 6127 serial_buf = 6128 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 6129 6130 /* Clean up from previous instance of this device */ 6131 if (path->device->serial_num != NULL) { 6132 kfree(path->device->serial_num, M_CAMXPT); 6133 path->device->serial_num = NULL; 6134 path->device->serial_num_len = 0; 6135 } 6136 6137 if (serial_buf == NULL) { 6138 /* 6139 * Don't process the command as it was never sent 6140 */ 6141 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 6142 && (serial_buf->length > 0)) { 6143 6144 have_serialnum = 1; 6145 path->device->serial_num = 6146 kmalloc((serial_buf->length + 1), 6147 M_CAMXPT, M_INTWAIT); 6148 bcopy(serial_buf->serial_num, 6149 path->device->serial_num, 6150 serial_buf->length); 6151 path->device->serial_num_len = serial_buf->length; 6152 path->device->serial_num[serial_buf->length] = '\0'; 6153 } else if (cam_periph_error(done_ccb, 0, 6154 SF_RETRY_UA|SF_NO_PRINT, 6155 &softc->saved_ccb) == ERESTART) { 6156 return; 6157 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6158 /* Don't wedge the queue */ 6159 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6160 /*run_queue*/TRUE); 6161 } 6162 6163 /* 6164 * Let's see if we have seen this device before. 6165 */ 6166 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 6167 MD5_CTX context; 6168 u_int8_t digest[16]; 6169 6170 MD5Init(&context); 6171 6172 MD5Update(&context, 6173 (unsigned char *)&path->device->inq_data, 6174 sizeof(struct scsi_inquiry_data)); 6175 6176 if (have_serialnum) 6177 MD5Update(&context, serial_buf->serial_num, 6178 serial_buf->length); 6179 6180 MD5Final(digest, &context); 6181 if (bcmp(softc->digest, digest, 16) == 0) 6182 changed = 0; 6183 6184 /* 6185 * XXX Do we need to do a TUR in order to ensure 6186 * that the device really hasn't changed??? 6187 */ 6188 if ((changed != 0) 6189 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 6190 xpt_async(AC_LOST_DEVICE, path, NULL); 6191 } 6192 if (serial_buf != NULL) 6193 kfree(serial_buf, M_CAMXPT); 6194 6195 if (changed != 0) { 6196 /* 6197 * Now that we have all the necessary 6198 * information to safely perform transfer 6199 * negotiations... Controllers don't perform 6200 * any negotiation or tagged queuing until 6201 * after the first XPT_SET_TRAN_SETTINGS ccb is 6202 * received. So, on a new device, just retrieve 6203 * the user settings, and set them as the current 6204 * settings to set the device up. 6205 */ 6206 proberequestdefaultnegotiation(periph); 6207 xpt_release_ccb(done_ccb); 6208 6209 /* 6210 * Perform a TUR to allow the controller to 6211 * perform any necessary transfer negotiation. 6212 */ 6213 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6214 xpt_schedule(periph, priority); 6215 return; 6216 } 6217 xpt_release_ccb(done_ccb); 6218 break; 6219 } 6220 case PROBE_TUR_FOR_NEGOTIATION: 6221 case PROBE_DV_EXIT: 6222 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6223 /* Don't wedge the queue */ 6224 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6225 /*run_queue*/TRUE); 6226 } 6227 6228 xpt_reference_device(path->device); 6229 /* 6230 * Do Domain Validation for lun 0 on devices that claim 6231 * to support Synchronous Transfer modes. 6232 */ 6233 if (softc->action == PROBE_TUR_FOR_NEGOTIATION 6234 && done_ccb->ccb_h.target_lun == 0 6235 && (path->device->inq_data.flags & SID_Sync) != 0 6236 && (path->device->flags & CAM_DEV_IN_DV) == 0) { 6237 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6238 ("Begin Domain Validation\n")); 6239 path->device->flags |= CAM_DEV_IN_DV; 6240 xpt_release_ccb(done_ccb); 6241 softc->action = PROBE_INQUIRY_BASIC_DV1; 6242 xpt_schedule(periph, priority); 6243 return; 6244 } 6245 if (softc->action == PROBE_DV_EXIT) { 6246 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6247 ("Leave Domain Validation\n")); 6248 } 6249 path->device->flags &= 6250 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6251 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6252 /* Inform the XPT that a new device has been found */ 6253 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6254 xpt_action(done_ccb); 6255 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6256 done_ccb); 6257 } 6258 xpt_release_ccb(done_ccb); 6259 break; 6260 case PROBE_INQUIRY_BASIC_DV1: 6261 case PROBE_INQUIRY_BASIC_DV2: 6262 { 6263 struct scsi_inquiry_data *nbuf; 6264 struct ccb_scsiio *csio; 6265 6266 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 6267 /* Don't wedge the queue */ 6268 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 6269 /*run_queue*/TRUE); 6270 } 6271 csio = &done_ccb->csio; 6272 nbuf = (struct scsi_inquiry_data *)csio->data_ptr; 6273 if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { 6274 xpt_print(path, 6275 "inquiry data fails comparison at DV%d step\n", 6276 softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); 6277 if (proberequestbackoff(periph, path->device)) { 6278 path->device->flags &= ~CAM_DEV_IN_DV; 6279 softc->action = PROBE_TUR_FOR_NEGOTIATION; 6280 } else { 6281 /* give up */ 6282 softc->action = PROBE_DV_EXIT; 6283 } 6284 kfree(nbuf, M_CAMXPT); 6285 xpt_release_ccb(done_ccb); 6286 xpt_schedule(periph, priority); 6287 return; 6288 } 6289 kfree(nbuf, M_CAMXPT); 6290 if (softc->action == PROBE_INQUIRY_BASIC_DV1) { 6291 softc->action = PROBE_INQUIRY_BASIC_DV2; 6292 xpt_release_ccb(done_ccb); 6293 xpt_schedule(periph, priority); 6294 return; 6295 } 6296 if (softc->action == PROBE_DV_EXIT) { 6297 CAM_DEBUG(periph->path, CAM_DEBUG_INFO, 6298 ("Leave Domain Validation Successfully\n")); 6299 } 6300 path->device->flags &= 6301 ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); 6302 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 6303 /* Inform the XPT that a new device has been found */ 6304 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 6305 xpt_action(done_ccb); 6306 xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, 6307 done_ccb); 6308 } 6309 xpt_release_ccb(done_ccb); 6310 break; 6311 } 6312 } 6313 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 6314 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 6315 done_ccb->ccb_h.status = CAM_REQ_CMP; 6316 xpt_done(done_ccb); 6317 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 6318 cam_periph_invalidate(periph); 6319 cam_periph_release(periph); 6320 } else { 6321 probeschedule(periph); 6322 } 6323 } 6324 6325 static void 6326 probecleanup(struct cam_periph *periph) 6327 { 6328 kfree(periph->softc, M_CAMXPT); 6329 } 6330 6331 static void 6332 xpt_find_quirk(struct cam_ed *device) 6333 { 6334 caddr_t match; 6335 6336 match = cam_quirkmatch((caddr_t)&device->inq_data, 6337 (caddr_t)xpt_quirk_table, 6338 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 6339 sizeof(*xpt_quirk_table), scsi_inquiry_match); 6340 6341 if (match == NULL) 6342 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 6343 6344 device->quirk = (struct xpt_quirk_entry *)match; 6345 } 6346 6347 static int 6348 sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) 6349 { 6350 int error, bool; 6351 6352 bool = cam_srch_hi; 6353 error = sysctl_handle_int(oidp, &bool, 0, req); 6354 if (error != 0 || req->newptr == NULL) 6355 return (error); 6356 if (bool == 0 || bool == 1) { 6357 cam_srch_hi = bool; 6358 return (0); 6359 } else { 6360 return (EINVAL); 6361 } 6362 } 6363 6364 static void 6365 xpt_devise_transport(struct cam_path *path) 6366 { 6367 struct ccb_pathinq cpi; 6368 struct ccb_trans_settings cts; 6369 struct scsi_inquiry_data *inq_buf; 6370 6371 /* Get transport information from the SIM */ 6372 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 6373 cpi.ccb_h.func_code = XPT_PATH_INQ; 6374 xpt_action((union ccb *)&cpi); 6375 6376 inq_buf = NULL; 6377 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 6378 inq_buf = &path->device->inq_data; 6379 path->device->protocol = PROTO_SCSI; 6380 path->device->protocol_version = 6381 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 6382 path->device->transport = cpi.transport; 6383 path->device->transport_version = cpi.transport_version; 6384 6385 /* 6386 * Any device not using SPI3 features should 6387 * be considered SPI2 or lower. 6388 */ 6389 if (inq_buf != NULL) { 6390 if (path->device->transport == XPORT_SPI 6391 && (inq_buf->spi3data & SID_SPI_MASK) == 0 6392 && path->device->transport_version > 2) 6393 path->device->transport_version = 2; 6394 } else { 6395 struct cam_ed* otherdev; 6396 6397 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 6398 otherdev != NULL; 6399 otherdev = TAILQ_NEXT(otherdev, links)) { 6400 if (otherdev != path->device) 6401 break; 6402 } 6403 6404 if (otherdev != NULL) { 6405 /* 6406 * Initially assume the same versioning as 6407 * prior luns for this target. 6408 */ 6409 path->device->protocol_version = 6410 otherdev->protocol_version; 6411 path->device->transport_version = 6412 otherdev->transport_version; 6413 } else { 6414 /* Until we know better, opt for safty */ 6415 path->device->protocol_version = 2; 6416 if (path->device->transport == XPORT_SPI) 6417 path->device->transport_version = 2; 6418 else 6419 path->device->transport_version = 0; 6420 } 6421 } 6422 6423 /* 6424 * XXX 6425 * For a device compliant with SPC-2 we should be able 6426 * to determine the transport version supported by 6427 * scrutinizing the version descriptors in the 6428 * inquiry buffer. 6429 */ 6430 6431 /* Tell the controller what we think */ 6432 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 6433 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 6434 cts.type = CTS_TYPE_CURRENT_SETTINGS; 6435 cts.transport = path->device->transport; 6436 cts.transport_version = path->device->transport_version; 6437 cts.protocol = path->device->protocol; 6438 cts.protocol_version = path->device->protocol_version; 6439 cts.proto_specific.valid = 0; 6440 cts.xport_specific.valid = 0; 6441 xpt_action((union ccb *)&cts); 6442 } 6443 6444 static void 6445 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6446 int async_update) 6447 { 6448 struct ccb_pathinq cpi; 6449 struct ccb_trans_settings cur_cts; 6450 struct ccb_trans_settings_scsi *scsi; 6451 struct ccb_trans_settings_scsi *cur_scsi; 6452 struct cam_sim *sim; 6453 struct scsi_inquiry_data *inq_data; 6454 6455 if (device == NULL) { 6456 cts->ccb_h.status = CAM_PATH_INVALID; 6457 xpt_done((union ccb *)cts); 6458 return; 6459 } 6460 6461 if (cts->protocol == PROTO_UNKNOWN 6462 || cts->protocol == PROTO_UNSPECIFIED) { 6463 cts->protocol = device->protocol; 6464 cts->protocol_version = device->protocol_version; 6465 } 6466 6467 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 6468 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 6469 cts->protocol_version = device->protocol_version; 6470 6471 if (cts->protocol != device->protocol) { 6472 xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", 6473 cts->protocol, device->protocol); 6474 cts->protocol = device->protocol; 6475 } 6476 6477 if (cts->protocol_version > device->protocol_version) { 6478 if (bootverbose) { 6479 xpt_print(cts->ccb_h.path, "Down reving Protocol " 6480 "Version from %d to %d?\n", cts->protocol_version, 6481 device->protocol_version); 6482 } 6483 cts->protocol_version = device->protocol_version; 6484 } 6485 6486 if (cts->transport == XPORT_UNKNOWN 6487 || cts->transport == XPORT_UNSPECIFIED) { 6488 cts->transport = device->transport; 6489 cts->transport_version = device->transport_version; 6490 } 6491 6492 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6493 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6494 cts->transport_version = device->transport_version; 6495 6496 if (cts->transport != device->transport) { 6497 xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", 6498 cts->transport, device->transport); 6499 cts->transport = device->transport; 6500 } 6501 6502 if (cts->transport_version > device->transport_version) { 6503 if (bootverbose) { 6504 xpt_print(cts->ccb_h.path, "Down reving Transport " 6505 "Version from %d to %d?\n", cts->transport_version, 6506 device->transport_version); 6507 } 6508 cts->transport_version = device->transport_version; 6509 } 6510 6511 sim = cts->ccb_h.path->bus->sim; 6512 6513 /* 6514 * Nothing more of interest to do unless 6515 * this is a device connected via the 6516 * SCSI protocol. 6517 */ 6518 if (cts->protocol != PROTO_SCSI) { 6519 if (async_update == FALSE) 6520 (*(sim->sim_action))(sim, (union ccb *)cts); 6521 return; 6522 } 6523 6524 inq_data = &device->inq_data; 6525 scsi = &cts->proto_specific.scsi; 6526 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6527 cpi.ccb_h.func_code = XPT_PATH_INQ; 6528 xpt_action((union ccb *)&cpi); 6529 6530 /* SCSI specific sanity checking */ 6531 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6532 || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 6533 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6534 || (device->quirk->mintags == 0)) { 6535 /* 6536 * Can't tag on hardware that doesn't support tags, 6537 * doesn't have it enabled, or has broken tag support. 6538 */ 6539 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6540 } 6541 6542 if (async_update == FALSE) { 6543 /* 6544 * Perform sanity checking against what the 6545 * controller and device can do. 6546 */ 6547 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6548 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6549 cur_cts.type = cts->type; 6550 xpt_action((union ccb *)&cur_cts); 6551 if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 6552 return; 6553 } 6554 cur_scsi = &cur_cts.proto_specific.scsi; 6555 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6556 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6557 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6558 } 6559 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6560 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6561 } 6562 6563 /* SPI specific sanity checking */ 6564 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6565 u_int spi3caps; 6566 struct ccb_trans_settings_spi *spi; 6567 struct ccb_trans_settings_spi *cur_spi; 6568 6569 spi = &cts->xport_specific.spi; 6570 6571 cur_spi = &cur_cts.xport_specific.spi; 6572 6573 /* Fill in any gaps in what the user gave us */ 6574 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6575 spi->sync_period = cur_spi->sync_period; 6576 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6577 spi->sync_period = 0; 6578 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6579 spi->sync_offset = cur_spi->sync_offset; 6580 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6581 spi->sync_offset = 0; 6582 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6583 spi->ppr_options = cur_spi->ppr_options; 6584 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6585 spi->ppr_options = 0; 6586 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6587 spi->bus_width = cur_spi->bus_width; 6588 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6589 spi->bus_width = 0; 6590 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6591 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6592 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6593 } 6594 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6595 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6596 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6597 && (inq_data->flags & SID_Sync) == 0 6598 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6599 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6600 || (spi->sync_offset == 0) 6601 || (spi->sync_period == 0)) { 6602 /* Force async */ 6603 spi->sync_period = 0; 6604 spi->sync_offset = 0; 6605 } 6606 6607 switch (spi->bus_width) { 6608 case MSG_EXT_WDTR_BUS_32_BIT: 6609 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6610 || (inq_data->flags & SID_WBus32) != 0 6611 || cts->type == CTS_TYPE_USER_SETTINGS) 6612 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6613 break; 6614 /* Fall Through to 16-bit */ 6615 case MSG_EXT_WDTR_BUS_16_BIT: 6616 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6617 || (inq_data->flags & SID_WBus16) != 0 6618 || cts->type == CTS_TYPE_USER_SETTINGS) 6619 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6620 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6621 break; 6622 } 6623 /* Fall Through to 8-bit */ 6624 default: /* New bus width?? */ 6625 case MSG_EXT_WDTR_BUS_8_BIT: 6626 /* All targets can do this */ 6627 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6628 break; 6629 } 6630 6631 spi3caps = cpi.xport_specific.spi.ppr_options; 6632 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6633 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6634 spi3caps &= inq_data->spi3data; 6635 6636 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6637 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6638 6639 if ((spi3caps & SID_SPI_IUS) == 0) 6640 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6641 6642 if ((spi3caps & SID_SPI_QAS) == 0) 6643 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6644 6645 /* No SPI Transfer settings are allowed unless we are wide */ 6646 if (spi->bus_width == 0) 6647 spi->ppr_options = 0; 6648 6649 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { 6650 /* 6651 * Can't tag queue without disconnection. 6652 */ 6653 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6654 scsi->valid |= CTS_SCSI_VALID_TQ; 6655 } 6656 6657 /* 6658 * If we are currently performing tagged transactions to 6659 * this device and want to change its negotiation parameters, 6660 * go non-tagged for a bit to give the controller a chance to 6661 * negotiate unhampered by tag messages. 6662 */ 6663 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6664 && (device->inq_flags & SID_CmdQue) != 0 6665 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6666 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6667 CTS_SPI_VALID_SYNC_OFFSET| 6668 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6669 xpt_toggle_tags(cts->ccb_h.path); 6670 } 6671 6672 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6673 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6674 int device_tagenb; 6675 6676 /* 6677 * If we are transitioning from tags to no-tags or 6678 * vice-versa, we need to carefully freeze and restart 6679 * the queue so that we don't overlap tagged and non-tagged 6680 * commands. We also temporarily stop tags if there is 6681 * a change in transfer negotiation settings to allow 6682 * "tag-less" negotiation. 6683 */ 6684 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6685 || (device->inq_flags & SID_CmdQue) != 0) 6686 device_tagenb = TRUE; 6687 else 6688 device_tagenb = FALSE; 6689 6690 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6691 && device_tagenb == FALSE) 6692 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6693 && device_tagenb == TRUE)) { 6694 6695 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6696 /* 6697 * Delay change to use tags until after a 6698 * few commands have gone to this device so 6699 * the controller has time to perform transfer 6700 * negotiations without tagged messages getting 6701 * in the way. 6702 */ 6703 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6704 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6705 } else { 6706 struct ccb_relsim crs; 6707 6708 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6709 device->inq_flags &= ~SID_CmdQue; 6710 xpt_dev_ccbq_resize(cts->ccb_h.path, 6711 sim->max_dev_openings); 6712 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6713 device->tag_delay_count = 0; 6714 6715 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6716 /*priority*/1); 6717 crs.ccb_h.func_code = XPT_REL_SIMQ; 6718 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6719 crs.openings 6720 = crs.release_timeout 6721 = crs.qfrozen_cnt 6722 = 0; 6723 xpt_action((union ccb *)&crs); 6724 } 6725 } 6726 } 6727 if (async_update == FALSE) 6728 (*(sim->sim_action))(sim, (union ccb *)cts); 6729 } 6730 6731 static void 6732 xpt_toggle_tags(struct cam_path *path) 6733 { 6734 struct cam_ed *dev; 6735 6736 /* 6737 * Give controllers a chance to renegotiate 6738 * before starting tag operations. We 6739 * "toggle" tagged queuing off then on 6740 * which causes the tag enable command delay 6741 * counter to come into effect. 6742 */ 6743 dev = path->device; 6744 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6745 || ((dev->inq_flags & SID_CmdQue) != 0 6746 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6747 struct ccb_trans_settings cts; 6748 6749 xpt_setup_ccb(&cts.ccb_h, path, 1); 6750 cts.protocol = PROTO_SCSI; 6751 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6752 cts.transport = XPORT_UNSPECIFIED; 6753 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6754 cts.proto_specific.scsi.flags = 0; 6755 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6756 xpt_set_transfer_settings(&cts, path->device, 6757 /*async_update*/TRUE); 6758 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6759 xpt_set_transfer_settings(&cts, path->device, 6760 /*async_update*/TRUE); 6761 } 6762 } 6763 6764 static void 6765 xpt_start_tags(struct cam_path *path) 6766 { 6767 struct ccb_relsim crs; 6768 struct cam_ed *device; 6769 struct cam_sim *sim; 6770 int newopenings; 6771 6772 device = path->device; 6773 sim = path->bus->sim; 6774 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6775 xpt_freeze_devq(path, /*count*/1); 6776 device->inq_flags |= SID_CmdQue; 6777 if (device->tag_saved_openings != 0) 6778 newopenings = device->tag_saved_openings; 6779 else 6780 newopenings = min(device->quirk->maxtags, 6781 sim->max_tagged_dev_openings); 6782 xpt_dev_ccbq_resize(path, newopenings); 6783 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6784 crs.ccb_h.func_code = XPT_REL_SIMQ; 6785 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6786 crs.openings 6787 = crs.release_timeout 6788 = crs.qfrozen_cnt 6789 = 0; 6790 xpt_action((union ccb *)&crs); 6791 } 6792 6793 static int busses_to_config; 6794 static int busses_to_reset; 6795 6796 static int 6797 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6798 { 6799 6800 sim_lock_assert_owned(bus->sim->lock); 6801 6802 if (bus->path_id != CAM_XPT_PATH_ID) { 6803 struct cam_path path; 6804 struct ccb_pathinq cpi; 6805 int can_negotiate; 6806 6807 busses_to_config++; 6808 xpt_compile_path(&path, NULL, bus->path_id, 6809 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6810 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6811 cpi.ccb_h.func_code = XPT_PATH_INQ; 6812 xpt_action((union ccb *)&cpi); 6813 can_negotiate = cpi.hba_inquiry; 6814 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6815 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6816 && can_negotiate) 6817 busses_to_reset++; 6818 xpt_release_path(&path); 6819 } 6820 6821 return(1); 6822 } 6823 6824 static int 6825 xptconfigfunc(struct cam_eb *bus, void *arg) 6826 { 6827 struct cam_path *path; 6828 union ccb *work_ccb; 6829 6830 sim_lock_assert_owned(bus->sim->lock); 6831 6832 if (bus->path_id != CAM_XPT_PATH_ID) { 6833 cam_status status; 6834 int can_negotiate; 6835 6836 work_ccb = xpt_alloc_ccb(); 6837 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6838 CAM_TARGET_WILDCARD, 6839 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6840 kprintf("xptconfigfunc: xpt_create_path failed with " 6841 "status %#x for bus %d\n", status, bus->path_id); 6842 kprintf("xptconfigfunc: halting bus configuration\n"); 6843 xpt_free_ccb(work_ccb); 6844 busses_to_config--; 6845 xpt_finishconfig(xpt_periph, NULL); 6846 return(0); 6847 } 6848 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6849 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6850 xpt_action(work_ccb); 6851 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6852 kprintf("xptconfigfunc: CPI failed on bus %d " 6853 "with status %d\n", bus->path_id, 6854 work_ccb->ccb_h.status); 6855 xpt_finishconfig(xpt_periph, work_ccb); 6856 return(1); 6857 } 6858 6859 can_negotiate = work_ccb->cpi.hba_inquiry; 6860 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6861 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6862 && (can_negotiate != 0)) { 6863 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6864 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6865 work_ccb->ccb_h.cbfcnp = NULL; 6866 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6867 ("Resetting Bus\n")); 6868 xpt_action(work_ccb); 6869 xpt_finishconfig(xpt_periph, work_ccb); 6870 } else { 6871 /* Act as though we performed a successful BUS RESET */ 6872 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6873 xpt_finishconfig(xpt_periph, work_ccb); 6874 } 6875 } 6876 6877 return(1); 6878 } 6879 6880 static void 6881 xpt_config(void *arg) 6882 { 6883 /* 6884 * Now that interrupts are enabled, go find our devices 6885 */ 6886 6887 #ifdef CAMDEBUG 6888 /* Setup debugging flags and path */ 6889 #ifdef CAM_DEBUG_FLAGS 6890 cam_dflags = CAM_DEBUG_FLAGS; 6891 #else /* !CAM_DEBUG_FLAGS */ 6892 cam_dflags = CAM_DEBUG_NONE; 6893 #endif /* CAM_DEBUG_FLAGS */ 6894 #ifdef CAM_DEBUG_BUS 6895 if (cam_dflags != CAM_DEBUG_NONE) { 6896 /* 6897 * Locking is specifically omitted here. No SIMs have 6898 * registered yet, so xpt_create_path will only be searching 6899 * empty lists of targets and devices. 6900 */ 6901 if (xpt_create_path(&cam_dpath, xpt_periph, 6902 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6903 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6904 kprintf("xpt_config: xpt_create_path() failed for debug" 6905 " target %d:%d:%d, debugging disabled\n", 6906 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6907 cam_dflags = CAM_DEBUG_NONE; 6908 } 6909 } else 6910 cam_dpath = NULL; 6911 #else /* !CAM_DEBUG_BUS */ 6912 cam_dpath = NULL; 6913 #endif /* CAM_DEBUG_BUS */ 6914 #endif /* CAMDEBUG */ 6915 6916 /* 6917 * Scan all installed busses. 6918 */ 6919 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6920 6921 if (busses_to_config == 0) { 6922 /* Call manually because we don't have any busses */ 6923 xpt_finishconfig(xpt_periph, NULL); 6924 } else { 6925 if (busses_to_reset > 0 && scsi_delay >= 2000) { 6926 kprintf("Waiting %d seconds for SCSI " 6927 "devices to settle\n", scsi_delay/1000); 6928 } 6929 xpt_for_all_busses(xptconfigfunc, NULL); 6930 } 6931 } 6932 6933 /* 6934 * If the given device only has one peripheral attached to it, and if that 6935 * peripheral is the passthrough driver, announce it. This insures that the 6936 * user sees some sort of announcement for every peripheral in their system. 6937 */ 6938 static int 6939 xptpassannouncefunc(struct cam_ed *device, void *arg) 6940 { 6941 struct cam_periph *periph; 6942 int i; 6943 6944 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6945 periph = SLIST_NEXT(periph, periph_links), i++); 6946 6947 periph = SLIST_FIRST(&device->periphs); 6948 if ((i == 1) 6949 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6950 xpt_announce_periph(periph, NULL); 6951 6952 return(1); 6953 } 6954 6955 static void 6956 xpt_finishconfig_task(void *context, int pending) 6957 { 6958 struct periph_driver **p_drv; 6959 int i; 6960 6961 if (busses_to_config == 0) { 6962 /* Register all the peripheral drivers */ 6963 /* XXX This will have to change when we have loadable modules */ 6964 p_drv = periph_drivers; 6965 for (i = 0; p_drv[i] != NULL; i++) { 6966 (*p_drv[i]->init)(); 6967 } 6968 6969 /* 6970 * Check for devices with no "standard" peripheral driver 6971 * attached. For any devices like that, announce the 6972 * passthrough driver so the user will see something. 6973 */ 6974 xpt_for_all_devices(xptpassannouncefunc, NULL); 6975 6976 /* Release our hook so that the boot can continue. */ 6977 config_intrhook_disestablish(xsoftc.xpt_config_hook); 6978 kfree(xsoftc.xpt_config_hook, M_CAMXPT); 6979 xsoftc.xpt_config_hook = NULL; 6980 } 6981 6982 kfree(context, M_CAMXPT); 6983 } 6984 6985 static void 6986 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6987 { 6988 struct xpt_task *task; 6989 6990 if (done_ccb != NULL) { 6991 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6992 ("xpt_finishconfig\n")); 6993 switch(done_ccb->ccb_h.func_code) { 6994 case XPT_RESET_BUS: 6995 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6996 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6997 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6998 done_ccb->crcn.flags = 0; 6999 xpt_action(done_ccb); 7000 return; 7001 } 7002 /* FALLTHROUGH */ 7003 case XPT_SCAN_BUS: 7004 default: 7005 xpt_free_path(done_ccb->ccb_h.path); 7006 busses_to_config--; 7007 break; 7008 } 7009 } 7010 7011 if (busses_to_config == 0) { 7012 task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, M_INTWAIT); 7013 TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); 7014 taskqueue_enqueue(taskqueue_thread[mycpuid], &task->task); 7015 } 7016 7017 if (done_ccb != NULL) 7018 xpt_free_ccb(done_ccb); 7019 } 7020 7021 cam_status 7022 xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, 7023 struct cam_path *path) 7024 { 7025 struct ccb_setasync csa; 7026 cam_status status; 7027 int xptpath = 0; 7028 7029 if (path == NULL) { 7030 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7031 status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, 7032 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 7033 if (status != CAM_REQ_CMP) { 7034 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7035 return (status); 7036 } 7037 xptpath = 1; 7038 } 7039 7040 xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); 7041 csa.ccb_h.func_code = XPT_SASYNC_CB; 7042 csa.event_enable = event; 7043 csa.callback = cbfunc; 7044 csa.callback_arg = cbarg; 7045 xpt_action((union ccb *)&csa); 7046 status = csa.ccb_h.status; 7047 if (xptpath) { 7048 xpt_free_path(path); 7049 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7050 } 7051 return (status); 7052 } 7053 7054 static void 7055 xptaction(struct cam_sim *sim, union ccb *work_ccb) 7056 { 7057 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 7058 7059 switch (work_ccb->ccb_h.func_code) { 7060 /* Common cases first */ 7061 case XPT_PATH_INQ: /* Path routing inquiry */ 7062 { 7063 struct ccb_pathinq *cpi; 7064 7065 cpi = &work_ccb->cpi; 7066 cpi->version_num = 1; /* XXX??? */ 7067 cpi->hba_inquiry = 0; 7068 cpi->target_sprt = 0; 7069 cpi->hba_misc = 0; 7070 cpi->hba_eng_cnt = 0; 7071 cpi->max_target = 0; 7072 cpi->max_lun = 0; 7073 cpi->initiator_id = 0; 7074 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 7075 strncpy(cpi->hba_vid, "", HBA_IDLEN); 7076 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 7077 cpi->unit_number = sim->unit_number; 7078 cpi->bus_id = sim->bus_id; 7079 cpi->base_transfer_speed = 0; 7080 cpi->protocol = PROTO_UNSPECIFIED; 7081 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 7082 cpi->transport = XPORT_UNSPECIFIED; 7083 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 7084 cpi->ccb_h.status = CAM_REQ_CMP; 7085 xpt_done(work_ccb); 7086 break; 7087 } 7088 default: 7089 work_ccb->ccb_h.status = CAM_REQ_INVALID; 7090 xpt_done(work_ccb); 7091 break; 7092 } 7093 } 7094 7095 /* 7096 * The xpt as a "controller" has no interrupt sources, so polling 7097 * is a no-op. 7098 */ 7099 static void 7100 xptpoll(struct cam_sim *sim) 7101 { 7102 } 7103 7104 void 7105 xpt_lock_buses(void) 7106 { 7107 lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); 7108 } 7109 7110 void 7111 xpt_unlock_buses(void) 7112 { 7113 lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); 7114 } 7115 7116 7117 /* 7118 * Should only be called by the machine interrupt dispatch routines, 7119 * so put these prototypes here instead of in the header. 7120 */ 7121 7122 static void 7123 swi_cambio(void *arg, void *frame) 7124 { 7125 camisr(NULL); 7126 } 7127 7128 static void 7129 camisr(void *dummy) 7130 { 7131 cam_simq_t queue; 7132 struct cam_sim *sim; 7133 7134 spin_lock_wr(&cam_simq_spin); 7135 TAILQ_INIT(&queue); 7136 TAILQ_CONCAT(&queue, &cam_simq, links); 7137 spin_unlock_wr(&cam_simq_spin); 7138 7139 while ((sim = TAILQ_FIRST(&queue)) != NULL) { 7140 TAILQ_REMOVE(&queue, sim, links); 7141 CAM_SIM_LOCK(sim); 7142 sim->flags &= ~CAM_SIM_ON_DONEQ; 7143 camisr_runqueue(sim); 7144 CAM_SIM_UNLOCK(sim); 7145 } 7146 } 7147 7148 static void 7149 camisr_runqueue(struct cam_sim *sim) 7150 { 7151 struct ccb_hdr *ccb_h; 7152 int runq; 7153 7154 spin_lock_wr(&sim->sim_spin); 7155 while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { 7156 TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); 7157 spin_unlock_wr(&sim->sim_spin); 7158 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 7159 7160 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 7161 ("camisr\n")); 7162 7163 runq = FALSE; 7164 7165 if (ccb_h->flags & CAM_HIGH_POWER) { 7166 struct highpowerlist *hphead; 7167 struct cam_ed *device; 7168 union ccb *send_ccb; 7169 7170 lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); 7171 hphead = &xsoftc.highpowerq; 7172 7173 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 7174 7175 /* 7176 * Increment the count since this command is done. 7177 */ 7178 xsoftc.num_highpower++; 7179 7180 /* 7181 * Any high powered commands queued up? 7182 */ 7183 if (send_ccb != NULL) { 7184 device = send_ccb->ccb_h.path->device; 7185 7186 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 7187 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7188 7189 xpt_release_devq(send_ccb->ccb_h.path, 7190 /*count*/1, /*runqueue*/TRUE); 7191 } else 7192 lockmgr(&xsoftc.xpt_lock, LK_RELEASE); 7193 } 7194 7195 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 7196 struct cam_ed *dev; 7197 7198 dev = ccb_h->path->device; 7199 7200 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 7201 7202 if (!SIM_DEAD(ccb_h->path->bus->sim)) { 7203 ccb_h->path->bus->sim->devq->send_active--; 7204 ccb_h->path->bus->sim->devq->send_openings++; 7205 } 7206 7207 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 7208 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 7209 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 7210 && (dev->ccbq.dev_active == 0))) { 7211 7212 xpt_release_devq(ccb_h->path, /*count*/1, 7213 /*run_queue*/TRUE); 7214 } 7215 7216 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 7217 && (--dev->tag_delay_count == 0)) 7218 xpt_start_tags(ccb_h->path); 7219 7220 if ((dev->ccbq.queue.entries > 0) 7221 && (dev->qfrozen_cnt == 0) 7222 && (device_is_send_queued(dev) == 0)) { 7223 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 7224 dev); 7225 } 7226 } 7227 7228 if (ccb_h->status & CAM_RELEASE_SIMQ) { 7229 xpt_release_simq(ccb_h->path->bus->sim, 7230 /*run_queue*/TRUE); 7231 ccb_h->status &= ~CAM_RELEASE_SIMQ; 7232 runq = FALSE; 7233 } 7234 7235 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 7236 && (ccb_h->status & CAM_DEV_QFRZN)) { 7237 xpt_release_devq(ccb_h->path, /*count*/1, 7238 /*run_queue*/TRUE); 7239 ccb_h->status &= ~CAM_DEV_QFRZN; 7240 } else if (runq) { 7241 xpt_run_dev_sendq(ccb_h->path->bus); 7242 } 7243 7244 /* Call the peripheral driver's callback */ 7245 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 7246 spin_lock_wr(&sim->sim_spin); 7247 } 7248 spin_unlock_wr(&sim->sim_spin); 7249 } 7250 7251 static void 7252 dead_sim_action(struct cam_sim *sim, union ccb *ccb) 7253 { 7254 7255 ccb->ccb_h.status = CAM_DEV_NOT_THERE; 7256 xpt_done(ccb); 7257 } 7258 7259 static void 7260 dead_sim_poll(struct cam_sim *sim) 7261 { 7262 } 7263