1 /* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ 30 */ 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/types.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/time.h> 37 #include <sys/conf.h> 38 #include <sys/fcntl.h> 39 #include <sys/md5.h> 40 #include <sys/devicestat.h> 41 #include <sys/interrupt.h> 42 #include <sys/bus.h> 43 44 #ifdef PC98 45 #include <pc98/pc98/pc98_machdep.h> /* geometry translation */ 46 #endif 47 48 #include <machine/clock.h> 49 #include <machine/ipl.h> 50 51 #include <cam/cam.h> 52 #include <cam/cam_ccb.h> 53 #include <cam/cam_periph.h> 54 #include <cam/cam_sim.h> 55 #include <cam/cam_xpt.h> 56 #include <cam/cam_xpt_sim.h> 57 #include <cam/cam_xpt_periph.h> 58 #include <cam/cam_debug.h> 59 60 #include <cam/scsi/scsi_all.h> 61 #include <cam/scsi/scsi_message.h> 62 #include <cam/scsi/scsi_pass.h> 63 #include "opt_cam.h" 64 65 /* Datastructures internal to the xpt layer */ 66 67 /* 68 * Definition of an async handler callback block. These are used to add 69 * SIMs and peripherals to the async callback lists. 70 */ 71 struct async_node { 72 SLIST_ENTRY(async_node) links; 73 u_int32_t event_enable; /* Async Event enables */ 74 void (*callback)(void *arg, u_int32_t code, 75 struct cam_path *path, void *args); 76 void *callback_arg; 77 }; 78 79 SLIST_HEAD(async_list, async_node); 80 SLIST_HEAD(periph_list, cam_periph); 81 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 82 83 /* 84 * This is the maximum number of high powered commands (e.g. start unit) 85 * that can be outstanding at a particular time. 86 */ 87 #ifndef CAM_MAX_HIGHPOWER 88 #define CAM_MAX_HIGHPOWER 4 89 #endif 90 91 /* number of high powered commands that can go through right now */ 92 static int num_highpower = CAM_MAX_HIGHPOWER; 93 94 /* 95 * Structure for queueing a device in a run queue. 96 * There is one run queue for allocating new ccbs, 97 * and another for sending ccbs to the controller. 98 */ 99 struct cam_ed_qinfo { 100 cam_pinfo pinfo; 101 struct cam_ed *device; 102 }; 103 104 /* 105 * The CAM EDT (Existing Device Table) contains the device information for 106 * all devices for all busses in the system. The table contains a 107 * cam_ed structure for each device on the bus. 108 */ 109 struct cam_ed { 110 TAILQ_ENTRY(cam_ed) links; 111 struct cam_ed_qinfo alloc_ccb_entry; 112 struct cam_ed_qinfo send_ccb_entry; 113 struct cam_et *target; 114 lun_id_t lun_id; 115 struct camq drvq; /* 116 * Queue of type drivers wanting to do 117 * work on this device. 118 */ 119 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 120 struct async_list asyncs; /* Async callback info for this B/T/L */ 121 struct periph_list periphs; /* All attached devices */ 122 u_int generation; /* Generation number */ 123 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 124 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 125 /* Storage for the inquiry data */ 126 struct scsi_inquiry_data inq_data; 127 u_int8_t inq_flags; /* 128 * Current settings for inquiry flags. 129 * This allows us to override settings 130 * like disconnection and tagged 131 * queuing for a device. 132 */ 133 u_int8_t queue_flags; /* Queue flags from the control page */ 134 u_int8_t serial_num_len; 135 u_int8_t *serial_num; 136 u_int32_t qfrozen_cnt; 137 u_int32_t flags; 138 #define CAM_DEV_UNCONFIGURED 0x01 139 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 140 #define CAM_DEV_REL_ON_COMPLETE 0x04 141 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 142 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 143 #define CAM_DEV_TAG_AFTER_COUNT 0x20 144 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 145 u_int32_t tag_delay_count; 146 #define CAM_TAG_DELAY_COUNT 5 147 u_int32_t refcount; 148 struct callout_handle c_handle; 149 }; 150 151 /* 152 * Each target is represented by an ET (Existing Target). These 153 * entries are created when a target is successfully probed with an 154 * identify, and removed when a device fails to respond after a number 155 * of retries, or a bus rescan finds the device missing. 156 */ 157 struct cam_et { 158 TAILQ_HEAD(, cam_ed) ed_entries; 159 TAILQ_ENTRY(cam_et) links; 160 struct cam_eb *bus; 161 target_id_t target_id; 162 u_int32_t refcount; 163 u_int generation; 164 struct timeval last_reset; 165 }; 166 167 /* 168 * Each bus is represented by an EB (Existing Bus). These entries 169 * are created by calls to xpt_bus_register and deleted by calls to 170 * xpt_bus_deregister. 171 */ 172 struct cam_eb { 173 TAILQ_HEAD(, cam_et) et_entries; 174 TAILQ_ENTRY(cam_eb) links; 175 path_id_t path_id; 176 struct cam_sim *sim; 177 struct timeval last_reset; 178 u_int32_t flags; 179 #define CAM_EB_RUNQ_SCHEDULED 0x01 180 u_int32_t refcount; 181 u_int generation; 182 }; 183 184 struct cam_path { 185 struct cam_periph *periph; 186 struct cam_eb *bus; 187 struct cam_et *target; 188 struct cam_ed *device; 189 }; 190 191 struct xpt_quirk_entry { 192 struct scsi_inquiry_pattern inq_pat; 193 u_int8_t quirks; 194 #define CAM_QUIRK_NOLUNS 0x01 195 #define CAM_QUIRK_NOSERIAL 0x02 196 #define CAM_QUIRK_HILUNS 0x04 197 u_int mintags; 198 u_int maxtags; 199 }; 200 #define CAM_SCSI2_MAXLUN 8 201 202 typedef enum { 203 XPT_FLAG_OPEN = 0x01 204 } xpt_flags; 205 206 struct xpt_softc { 207 xpt_flags flags; 208 u_int32_t generation; 209 }; 210 211 static const char quantum[] = "QUANTUM"; 212 static const char sony[] = "SONY"; 213 static const char west_digital[] = "WDIGTL"; 214 static const char samsung[] = "SAMSUNG"; 215 static const char seagate[] = "SEAGATE"; 216 static const char microp[] = "MICROP"; 217 218 static struct xpt_quirk_entry xpt_quirk_table[] = 219 { 220 { 221 /* Reports QUEUE FULL for temporary resource shortages */ 222 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 223 /*quirks*/0, /*mintags*/24, /*maxtags*/32 224 }, 225 { 226 /* Reports QUEUE FULL for temporary resource shortages */ 227 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 228 /*quirks*/0, /*mintags*/24, /*maxtags*/32 229 }, 230 { 231 /* Reports QUEUE FULL for temporary resource shortages */ 232 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 233 /*quirks*/0, /*mintags*/24, /*maxtags*/32 234 }, 235 { 236 /* Broken tagged queuing drive */ 237 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 238 /*quirks*/0, /*mintags*/0, /*maxtags*/0 239 }, 240 { 241 /* Broken tagged queuing drive */ 242 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 243 /*quirks*/0, /*mintags*/0, /*maxtags*/0 244 }, 245 { 246 /* Broken tagged queuing drive */ 247 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 248 /*quirks*/0, /*mintags*/0, /*maxtags*/0 249 }, 250 { 251 /* 252 * Unfortunately, the Quantum Atlas III has the same 253 * problem as the Atlas II drives above. 254 * Reported by: "Johan Granlund" <johan@granlund.nu> 255 * 256 * For future reference, the drive with the problem was: 257 * QUANTUM QM39100TD-SW N1B0 258 * 259 * It's possible that Quantum will fix the problem in later 260 * firmware revisions. If that happens, the quirk entry 261 * will need to be made specific to the firmware revisions 262 * with the problem. 263 * 264 */ 265 /* Reports QUEUE FULL for temporary resource shortages */ 266 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 267 /*quirks*/0, /*mintags*/24, /*maxtags*/32 268 }, 269 { 270 /* 271 * 18 Gig Atlas III, same problem as the 9G version. 272 * Reported by: Andre Albsmeier 273 * <andre.albsmeier@mchp.siemens.de> 274 * 275 * For future reference, the drive with the problem was: 276 * QUANTUM QM318000TD-S N491 277 */ 278 /* Reports QUEUE FULL for temporary resource shortages */ 279 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 280 /*quirks*/0, /*mintags*/24, /*maxtags*/32 281 }, 282 { 283 /* 284 * Broken tagged queuing drive 285 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 286 * and: Martin Renters <martin@tdc.on.ca> 287 */ 288 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 289 /*quirks*/0, /*mintags*/0, /*maxtags*/0 290 }, 291 /* 292 * The Seagate Medalist Pro drives have very poor write 293 * performance with anything more than 2 tags. 294 * 295 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 296 * Drive: <SEAGATE ST36530N 1444> 297 * 298 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 299 * Drive: <SEAGATE ST34520W 1281> 300 * 301 * No one has actually reported that the 9G version 302 * (ST39140*) of the Medalist Pro has the same problem, but 303 * we're assuming that it does because the 4G and 6.5G 304 * versions of the drive are broken. 305 */ 306 { 307 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 308 /*quirks*/0, /*mintags*/2, /*maxtags*/2 309 }, 310 { 311 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 312 /*quirks*/0, /*mintags*/2, /*maxtags*/2 313 }, 314 { 315 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 316 /*quirks*/0, /*mintags*/2, /*maxtags*/2 317 }, 318 { 319 /* 320 * Slow when tagged queueing is enabled. Write performance 321 * steadily drops off with more and more concurrent 322 * transactions. Best sequential write performance with 323 * tagged queueing turned off and write caching turned on. 324 * 325 * PR: kern/10398 326 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 327 * Drive: DCAS-34330 w/ "S65A" firmware. 328 * 329 * The drive with the problem had the "S65A" firmware 330 * revision, and has also been reported (by Stephen J. 331 * Roznowski <sjr@home.net>) for a drive with the "S61A" 332 * firmware revision. 333 * 334 * Although no one has reported problems with the 2 gig 335 * version of the DCAS drive, the assumption is that it 336 * has the same problems as the 4 gig version. Therefore 337 * this quirk entries disables tagged queueing for all 338 * DCAS drives. 339 */ 340 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 341 /*quirks*/0, /*mintags*/0, /*maxtags*/0 342 }, 343 { 344 /* Broken tagged queuing drive */ 345 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 346 /*quirks*/0, /*mintags*/0, /*maxtags*/0 347 }, 348 { 349 /* Broken tagged queuing drive */ 350 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 351 /*quirks*/0, /*mintags*/0, /*maxtags*/0 352 }, 353 { 354 /* 355 * Broken tagged queuing drive. 356 * Submitted by: 357 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 358 * in PR kern/9535 359 */ 360 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 361 /*quirks*/0, /*mintags*/0, /*maxtags*/0 362 }, 363 { 364 /* 365 * Slow when tagged queueing is enabled. (1.5MB/sec versus 366 * 8MB/sec.) 367 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 368 * Best performance with these drives is achieved with 369 * tagged queueing turned off, and write caching turned on. 370 */ 371 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 372 /*quirks*/0, /*mintags*/0, /*maxtags*/0 373 }, 374 { 375 /* 376 * Slow when tagged queueing is enabled. (1.5MB/sec versus 377 * 8MB/sec.) 378 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 379 * Best performance with these drives is achieved with 380 * tagged queueing turned off, and write caching turned on. 381 */ 382 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 383 /*quirks*/0, /*mintags*/0, /*maxtags*/0 384 }, 385 { 386 /* 387 * Doesn't handle queue full condition correctly, 388 * so we need to limit maxtags to what the device 389 * can handle instead of determining this automatically. 390 */ 391 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 392 /*quirks*/0, /*mintags*/2, /*maxtags*/32 393 }, 394 { 395 /* Really only one LUN */ 396 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 397 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 398 }, 399 { 400 /* I can't believe we need a quirk for DPT volumes. */ 401 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 402 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 403 /*mintags*/0, /*maxtags*/255 404 }, 405 { 406 /* 407 * Many Sony CDROM drives don't like multi-LUN probing. 408 */ 409 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 410 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 411 }, 412 { 413 /* 414 * This drive doesn't like multiple LUN probing. 415 * Submitted by: Parag Patel <parag@cgt.com> 416 */ 417 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 418 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 419 }, 420 { 421 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 422 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 423 }, 424 { 425 /* 426 * The 8200 doesn't like multi-lun probing, and probably 427 * don't like serial number requests either. 428 */ 429 { 430 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 431 "EXB-8200*", "*" 432 }, 433 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 434 }, 435 { 436 /* 437 * Let's try the same as above, but for a drive that says 438 * it's an IPL-6860 but is actually an EXB 8200. 439 */ 440 { 441 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 442 "IPL-6860*", "*" 443 }, 444 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 445 }, 446 { 447 /* 448 * These Hitachi drives don't like multi-lun probing. 449 * The PR submitter has a DK319H, but says that the Linux 450 * kernel has a similar work-around for the DK312 and DK314, 451 * so all DK31* drives are quirked here. 452 * PR: misc/18793 453 * Submitted by: Paul Haddad <paul@pth.com> 454 */ 455 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 456 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 457 }, 458 { 459 /* 460 * This old revision of the TDC3600 is also SCSI-1, and 461 * hangs upon serial number probing. 462 */ 463 { 464 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 465 " TDC 3600", "U07:" 466 }, 467 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 468 }, 469 { 470 /* 471 * Would repond to all LUNs if asked for. 472 */ 473 { 474 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 475 "CP150", "*" 476 }, 477 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 478 }, 479 { 480 /* 481 * Would repond to all LUNs if asked for. 482 */ 483 { 484 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 485 "96X2*", "*" 486 }, 487 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 488 }, 489 { 490 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 491 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 492 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 493 }, 494 { 495 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 496 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 497 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 498 }, 499 { 500 /* TeraSolutions special settings for TRC-22 RAID */ 501 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 502 /*quirks*/0, /*mintags*/55, /*maxtags*/255 503 }, 504 { 505 /* Veritas Storage Appliance */ 506 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 507 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 508 }, 509 { 510 /* 511 * Would respond to all LUNs. Device type and removable 512 * flag are jumper-selectable. 513 */ 514 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 515 "Tahiti 1", "*" 516 }, 517 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 518 }, 519 { 520 /* Default tagged queuing parameters for all devices */ 521 { 522 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 523 /*vendor*/"*", /*product*/"*", /*revision*/"*" 524 }, 525 /*quirks*/0, /*mintags*/2, /*maxtags*/255 526 }, 527 }; 528 529 static const int xpt_quirk_table_size = 530 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 531 532 typedef enum { 533 DM_RET_COPY = 0x01, 534 DM_RET_FLAG_MASK = 0x0f, 535 DM_RET_NONE = 0x00, 536 DM_RET_STOP = 0x10, 537 DM_RET_DESCEND = 0x20, 538 DM_RET_ERROR = 0x30, 539 DM_RET_ACTION_MASK = 0xf0 540 } dev_match_ret; 541 542 typedef enum { 543 XPT_DEPTH_BUS, 544 XPT_DEPTH_TARGET, 545 XPT_DEPTH_DEVICE, 546 XPT_DEPTH_PERIPH 547 } xpt_traverse_depth; 548 549 struct xpt_traverse_config { 550 xpt_traverse_depth depth; 551 void *tr_func; 552 void *tr_arg; 553 }; 554 555 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 556 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 557 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 558 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 559 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 560 561 /* Transport layer configuration information */ 562 static struct xpt_softc xsoftc; 563 564 /* Queues for our software interrupt handler */ 565 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 566 static cam_isrq_t cam_bioq; 567 static cam_isrq_t cam_netq; 568 569 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 570 static SLIST_HEAD(,ccb_hdr) ccb_freeq; 571 static u_int xpt_max_ccbs; /* 572 * Maximum size of ccb pool. Modified as 573 * devices are added/removed or have their 574 * opening counts changed. 575 */ 576 static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 577 578 struct cam_periph *xpt_periph; 579 580 static periph_init_t xpt_periph_init; 581 582 static periph_init_t probe_periph_init; 583 584 static struct periph_driver xpt_driver = 585 { 586 xpt_periph_init, "xpt", 587 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 588 }; 589 590 static struct periph_driver probe_driver = 591 { 592 probe_periph_init, "probe", 593 TAILQ_HEAD_INITIALIZER(probe_driver.units) 594 }; 595 596 DATA_SET(periphdriver_set, xpt_driver); 597 DATA_SET(periphdriver_set, probe_driver); 598 599 #define XPT_CDEV_MAJOR 104 600 601 static d_open_t xptopen; 602 static d_close_t xptclose; 603 static d_ioctl_t xptioctl; 604 605 static struct cdevsw xpt_cdevsw = { 606 /* open */ xptopen, 607 /* close */ xptclose, 608 /* read */ noread, 609 /* write */ nowrite, 610 /* ioctl */ xptioctl, 611 /* poll */ nopoll, 612 /* mmap */ nommap, 613 /* strategy */ nostrategy, 614 /* name */ "xpt", 615 /* maj */ XPT_CDEV_MAJOR, 616 /* dump */ nodump, 617 /* psize */ nopsize, 618 /* flags */ 0, 619 /* bmaj */ -1 620 }; 621 622 static struct intr_config_hook *xpt_config_hook; 623 624 /* Registered busses */ 625 static TAILQ_HEAD(,cam_eb) xpt_busses; 626 static u_int bus_generation; 627 628 /* Storage for debugging datastructures */ 629 #ifdef CAMDEBUG 630 struct cam_path *cam_dpath; 631 u_int32_t cam_dflags; 632 u_int32_t cam_debug_delay; 633 #endif 634 635 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 636 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 637 #endif 638 639 /* 640 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 641 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 642 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 643 */ 644 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 645 || defined(CAM_DEBUG_LUN) 646 #ifdef CAMDEBUG 647 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 648 || !defined(CAM_DEBUG_LUN) 649 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 650 and CAM_DEBUG_LUN" 651 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 652 #else /* !CAMDEBUG */ 653 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 654 #endif /* CAMDEBUG */ 655 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 656 657 /* Our boot-time initialization hook */ 658 static void xpt_init(void *); 659 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL); 660 661 static cam_status xpt_compile_path(struct cam_path *new_path, 662 struct cam_periph *perph, 663 path_id_t path_id, 664 target_id_t target_id, 665 lun_id_t lun_id); 666 667 static void xpt_release_path(struct cam_path *path); 668 669 static void xpt_async_bcast(struct async_list *async_head, 670 u_int32_t async_code, 671 struct cam_path *path, 672 void *async_arg); 673 static void xpt_dev_async(u_int32_t async_code, 674 struct cam_eb *bus, 675 struct cam_et *target, 676 struct cam_ed *device, 677 void *async_arg); 678 static path_id_t xptnextfreepathid(void); 679 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 680 static union ccb *xpt_get_ccb(struct cam_ed *device); 681 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 682 u_int32_t new_priority); 683 static void xpt_run_dev_allocq(struct cam_eb *bus); 684 static void xpt_run_dev_sendq(struct cam_eb *bus); 685 static timeout_t xpt_release_devq_timeout; 686 static timeout_t xpt_release_simq_timeout; 687 static void xpt_release_bus(struct cam_eb *bus); 688 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 689 int run_queue); 690 static struct cam_et* 691 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 692 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 693 static struct cam_ed* 694 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 695 lun_id_t lun_id); 696 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 697 struct cam_ed *device); 698 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 699 static struct cam_eb* 700 xpt_find_bus(path_id_t path_id); 701 static struct cam_et* 702 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 703 static struct cam_ed* 704 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 705 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 706 static void xpt_scan_lun(struct cam_periph *periph, 707 struct cam_path *path, cam_flags flags, 708 union ccb *ccb); 709 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 710 static xpt_busfunc_t xptconfigbuscountfunc; 711 static xpt_busfunc_t xptconfigfunc; 712 static void xpt_config(void *arg); 713 static xpt_devicefunc_t xptpassannouncefunc; 714 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 715 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 716 static void xptpoll(struct cam_sim *sim); 717 static swihand_t swi_camnet; 718 static swihand_t swi_cambio; 719 static void camisr(cam_isrq_t *queue); 720 #if 0 721 static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 722 static void xptasync(struct cam_periph *periph, 723 u_int32_t code, cam_path *path); 724 #endif 725 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 726 int num_patterns, struct cam_eb *bus); 727 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 728 int num_patterns, struct cam_ed *device); 729 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 730 int num_patterns, 731 struct cam_periph *periph); 732 static xpt_busfunc_t xptedtbusfunc; 733 static xpt_targetfunc_t xptedttargetfunc; 734 static xpt_devicefunc_t xptedtdevicefunc; 735 static xpt_periphfunc_t xptedtperiphfunc; 736 static xpt_pdrvfunc_t xptplistpdrvfunc; 737 static xpt_periphfunc_t xptplistperiphfunc; 738 static int xptedtmatch(struct ccb_dev_match *cdm); 739 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 740 static int xptbustraverse(struct cam_eb *start_bus, 741 xpt_busfunc_t *tr_func, void *arg); 742 static int xpttargettraverse(struct cam_eb *bus, 743 struct cam_et *start_target, 744 xpt_targetfunc_t *tr_func, void *arg); 745 static int xptdevicetraverse(struct cam_et *target, 746 struct cam_ed *start_device, 747 xpt_devicefunc_t *tr_func, void *arg); 748 static int xptperiphtraverse(struct cam_ed *device, 749 struct cam_periph *start_periph, 750 xpt_periphfunc_t *tr_func, void *arg); 751 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 752 xpt_pdrvfunc_t *tr_func, void *arg); 753 static int xptpdperiphtraverse(struct periph_driver **pdrv, 754 struct cam_periph *start_periph, 755 xpt_periphfunc_t *tr_func, 756 void *arg); 757 static xpt_busfunc_t xptdefbusfunc; 758 static xpt_targetfunc_t xptdeftargetfunc; 759 static xpt_devicefunc_t xptdefdevicefunc; 760 static xpt_periphfunc_t xptdefperiphfunc; 761 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 762 #ifdef notusedyet 763 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 764 void *arg); 765 #endif 766 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 767 void *arg); 768 #ifdef notusedyet 769 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 770 void *arg); 771 #endif 772 static xpt_devicefunc_t xptsetasyncfunc; 773 static xpt_busfunc_t xptsetasyncbusfunc; 774 static cam_status xptregister(struct cam_periph *periph, 775 void *arg); 776 static cam_status proberegister(struct cam_periph *periph, 777 void *arg); 778 static void probeschedule(struct cam_periph *probe_periph); 779 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 780 static void proberequestdefaultnegotiation(struct cam_periph *periph); 781 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 782 static void probecleanup(struct cam_periph *periph); 783 static void xpt_find_quirk(struct cam_ed *device); 784 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 785 struct cam_ed *device, 786 int async_update); 787 static void xpt_toggle_tags(struct cam_path *path); 788 static void xpt_start_tags(struct cam_path *path); 789 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 790 struct cam_ed *dev); 791 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 792 struct cam_ed *dev); 793 static __inline int periph_is_queued(struct cam_periph *periph); 794 static __inline int device_is_alloc_queued(struct cam_ed *device); 795 static __inline int device_is_send_queued(struct cam_ed *device); 796 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 797 798 static __inline int 799 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 800 { 801 int retval; 802 803 if (dev->ccbq.devq_openings > 0) { 804 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 805 cam_ccbq_resize(&dev->ccbq, 806 dev->ccbq.dev_openings 807 + dev->ccbq.dev_active); 808 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 809 } 810 /* 811 * The priority of a device waiting for CCB resources 812 * is that of the the highest priority peripheral driver 813 * enqueued. 814 */ 815 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 816 &dev->alloc_ccb_entry.pinfo, 817 CAMQ_GET_HEAD(&dev->drvq)->priority); 818 } else { 819 retval = 0; 820 } 821 822 return (retval); 823 } 824 825 static __inline int 826 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 827 { 828 int retval; 829 830 if (dev->ccbq.dev_openings > 0) { 831 /* 832 * The priority of a device waiting for controller 833 * resources is that of the the highest priority CCB 834 * enqueued. 835 */ 836 retval = 837 xpt_schedule_dev(&bus->sim->devq->send_queue, 838 &dev->send_ccb_entry.pinfo, 839 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 840 } else { 841 retval = 0; 842 } 843 return (retval); 844 } 845 846 static __inline int 847 periph_is_queued(struct cam_periph *periph) 848 { 849 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 850 } 851 852 static __inline int 853 device_is_alloc_queued(struct cam_ed *device) 854 { 855 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 856 } 857 858 static __inline int 859 device_is_send_queued(struct cam_ed *device) 860 { 861 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 862 } 863 864 static __inline int 865 dev_allocq_is_runnable(struct cam_devq *devq) 866 { 867 /* 868 * Have work to do. 869 * Have space to do more work. 870 * Allowed to do work. 871 */ 872 return ((devq->alloc_queue.qfrozen_cnt == 0) 873 && (devq->alloc_queue.entries > 0) 874 && (devq->alloc_openings > 0)); 875 } 876 877 static void 878 xpt_periph_init() 879 { 880 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 881 } 882 883 static void 884 probe_periph_init() 885 { 886 } 887 888 889 static void 890 xptdone(struct cam_periph *periph, union ccb *done_ccb) 891 { 892 /* Caller will release the CCB */ 893 wakeup(&done_ccb->ccb_h.cbfcnp); 894 } 895 896 static int 897 xptopen(dev_t dev, int flags, int fmt, struct proc *p) 898 { 899 int unit; 900 901 unit = minor(dev) & 0xff; 902 903 /* 904 * Only allow read-write access. 905 */ 906 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 907 return(EPERM); 908 909 /* 910 * We don't allow nonblocking access. 911 */ 912 if ((flags & O_NONBLOCK) != 0) { 913 printf("xpt%d: can't do nonblocking access\n", unit); 914 return(ENODEV); 915 } 916 917 /* 918 * We only have one transport layer right now. If someone accesses 919 * us via something other than minor number 1, point out their 920 * mistake. 921 */ 922 if (unit != 0) { 923 printf("xptopen: got invalid xpt unit %d\n", unit); 924 return(ENXIO); 925 } 926 927 /* Mark ourselves open */ 928 xsoftc.flags |= XPT_FLAG_OPEN; 929 930 return(0); 931 } 932 933 static int 934 xptclose(dev_t dev, int flag, int fmt, struct proc *p) 935 { 936 int unit; 937 938 unit = minor(dev) & 0xff; 939 940 /* 941 * We only have one transport layer right now. If someone accesses 942 * us via something other than minor number 1, point out their 943 * mistake. 944 */ 945 if (unit != 0) { 946 printf("xptclose: got invalid xpt unit %d\n", unit); 947 return(ENXIO); 948 } 949 950 /* Mark ourselves closed */ 951 xsoftc.flags &= ~XPT_FLAG_OPEN; 952 953 return(0); 954 } 955 956 static int 957 xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 958 { 959 int unit, error; 960 961 error = 0; 962 unit = minor(dev) & 0xff; 963 964 /* 965 * We only have one transport layer right now. If someone accesses 966 * us via something other than minor number 1, point out their 967 * mistake. 968 */ 969 if (unit != 0) { 970 printf("xptioctl: got invalid xpt unit %d\n", unit); 971 return(ENXIO); 972 } 973 974 switch(cmd) { 975 /* 976 * For the transport layer CAMIOCOMMAND ioctl, we really only want 977 * to accept CCB types that don't quite make sense to send through a 978 * passthrough driver. 979 */ 980 case CAMIOCOMMAND: { 981 union ccb *ccb; 982 union ccb *inccb; 983 984 inccb = (union ccb *)addr; 985 986 switch(inccb->ccb_h.func_code) { 987 case XPT_SCAN_BUS: 988 case XPT_RESET_BUS: 989 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 990 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 991 error = EINVAL; 992 break; 993 } 994 /* FALLTHROUGH */ 995 case XPT_PATH_INQ: 996 case XPT_ENG_INQ: 997 case XPT_SCAN_LUN: 998 999 ccb = xpt_alloc_ccb(); 1000 1001 /* 1002 * Create a path using the bus, target, and lun the 1003 * user passed in. 1004 */ 1005 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1006 inccb->ccb_h.path_id, 1007 inccb->ccb_h.target_id, 1008 inccb->ccb_h.target_lun) != 1009 CAM_REQ_CMP){ 1010 error = EINVAL; 1011 xpt_free_ccb(ccb); 1012 break; 1013 } 1014 /* Ensure all of our fields are correct */ 1015 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1016 inccb->ccb_h.pinfo.priority); 1017 xpt_merge_ccb(ccb, inccb); 1018 ccb->ccb_h.cbfcnp = xptdone; 1019 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1020 bcopy(ccb, inccb, sizeof(union ccb)); 1021 xpt_free_path(ccb->ccb_h.path); 1022 xpt_free_ccb(ccb); 1023 break; 1024 1025 case XPT_DEBUG: { 1026 union ccb ccb; 1027 1028 /* 1029 * This is an immediate CCB, so it's okay to 1030 * allocate it on the stack. 1031 */ 1032 1033 /* 1034 * Create a path using the bus, target, and lun the 1035 * user passed in. 1036 */ 1037 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1038 inccb->ccb_h.path_id, 1039 inccb->ccb_h.target_id, 1040 inccb->ccb_h.target_lun) != 1041 CAM_REQ_CMP){ 1042 error = EINVAL; 1043 break; 1044 } 1045 /* Ensure all of our fields are correct */ 1046 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1047 inccb->ccb_h.pinfo.priority); 1048 xpt_merge_ccb(&ccb, inccb); 1049 ccb.ccb_h.cbfcnp = xptdone; 1050 xpt_action(&ccb); 1051 bcopy(&ccb, inccb, sizeof(union ccb)); 1052 xpt_free_path(ccb.ccb_h.path); 1053 break; 1054 1055 } 1056 case XPT_DEV_MATCH: { 1057 struct cam_periph_map_info mapinfo; 1058 struct cam_path *old_path; 1059 1060 /* 1061 * We can't deal with physical addresses for this 1062 * type of transaction. 1063 */ 1064 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1065 error = EINVAL; 1066 break; 1067 } 1068 1069 /* 1070 * Save this in case the caller had it set to 1071 * something in particular. 1072 */ 1073 old_path = inccb->ccb_h.path; 1074 1075 /* 1076 * We really don't need a path for the matching 1077 * code. The path is needed because of the 1078 * debugging statements in xpt_action(). They 1079 * assume that the CCB has a valid path. 1080 */ 1081 inccb->ccb_h.path = xpt_periph->path; 1082 1083 bzero(&mapinfo, sizeof(mapinfo)); 1084 1085 /* 1086 * Map the pattern and match buffers into kernel 1087 * virtual address space. 1088 */ 1089 error = cam_periph_mapmem(inccb, &mapinfo); 1090 1091 if (error) { 1092 inccb->ccb_h.path = old_path; 1093 break; 1094 } 1095 1096 /* 1097 * This is an immediate CCB, we can send it on directly. 1098 */ 1099 xpt_action(inccb); 1100 1101 /* 1102 * Map the buffers back into user space. 1103 */ 1104 cam_periph_unmapmem(inccb, &mapinfo); 1105 1106 inccb->ccb_h.path = old_path; 1107 1108 error = 0; 1109 break; 1110 } 1111 default: 1112 error = ENOTSUP; 1113 break; 1114 } 1115 break; 1116 } 1117 /* 1118 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1119 * with the periphal driver name and unit name filled in. The other 1120 * fields don't really matter as input. The passthrough driver name 1121 * ("pass"), and unit number are passed back in the ccb. The current 1122 * device generation number, and the index into the device peripheral 1123 * driver list, and the status are also passed back. Note that 1124 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1125 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1126 * (or rather should be) impossible for the device peripheral driver 1127 * list to change since we look at the whole thing in one pass, and 1128 * we do it with splcam protection. 1129 * 1130 */ 1131 case CAMGETPASSTHRU: { 1132 union ccb *ccb; 1133 struct cam_periph *periph; 1134 struct periph_driver **p_drv; 1135 char *name; 1136 int unit; 1137 int cur_generation; 1138 int base_periph_found; 1139 int splbreaknum; 1140 int s; 1141 1142 ccb = (union ccb *)addr; 1143 unit = ccb->cgdl.unit_number; 1144 name = ccb->cgdl.periph_name; 1145 /* 1146 * Every 100 devices, we want to drop our spl protection to 1147 * give the software interrupt handler a chance to run. 1148 * Most systems won't run into this check, but this should 1149 * avoid starvation in the software interrupt handler in 1150 * large systems. 1151 */ 1152 splbreaknum = 100; 1153 1154 ccb = (union ccb *)addr; 1155 1156 base_periph_found = 0; 1157 1158 /* 1159 * Sanity check -- make sure we don't get a null peripheral 1160 * driver name. 1161 */ 1162 if (*ccb->cgdl.periph_name == '\0') { 1163 error = EINVAL; 1164 break; 1165 } 1166 1167 /* Keep the list from changing while we traverse it */ 1168 s = splcam(); 1169 ptstartover: 1170 cur_generation = xsoftc.generation; 1171 1172 /* first find our driver in the list of drivers */ 1173 for (p_drv = (struct periph_driver **)periphdriver_set.ls_items; 1174 *p_drv != NULL; p_drv++) 1175 if (strcmp((*p_drv)->driver_name, name) == 0) 1176 break; 1177 1178 if (*p_drv == NULL) { 1179 splx(s); 1180 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1181 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1182 *ccb->cgdl.periph_name = '\0'; 1183 ccb->cgdl.unit_number = 0; 1184 error = ENOENT; 1185 break; 1186 } 1187 1188 /* 1189 * Run through every peripheral instance of this driver 1190 * and check to see whether it matches the unit passed 1191 * in by the user. If it does, get out of the loops and 1192 * find the passthrough driver associated with that 1193 * peripheral driver. 1194 */ 1195 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 1196 periph = TAILQ_NEXT(periph, unit_links)) { 1197 1198 if (periph->unit_number == unit) { 1199 break; 1200 } else if (--splbreaknum == 0) { 1201 splx(s); 1202 s = splcam(); 1203 splbreaknum = 100; 1204 if (cur_generation != xsoftc.generation) 1205 goto ptstartover; 1206 } 1207 } 1208 /* 1209 * If we found the peripheral driver that the user passed 1210 * in, go through all of the peripheral drivers for that 1211 * particular device and look for a passthrough driver. 1212 */ 1213 if (periph != NULL) { 1214 struct cam_ed *device; 1215 int i; 1216 1217 base_periph_found = 1; 1218 device = periph->path->device; 1219 for (i = 0, periph = device->periphs.slh_first; 1220 periph != NULL; 1221 periph = periph->periph_links.sle_next, i++) { 1222 /* 1223 * Check to see whether we have a 1224 * passthrough device or not. 1225 */ 1226 if (strcmp(periph->periph_name, "pass") == 0) { 1227 /* 1228 * Fill in the getdevlist fields. 1229 */ 1230 strcpy(ccb->cgdl.periph_name, 1231 periph->periph_name); 1232 ccb->cgdl.unit_number = 1233 periph->unit_number; 1234 if (periph->periph_links.sle_next) 1235 ccb->cgdl.status = 1236 CAM_GDEVLIST_MORE_DEVS; 1237 else 1238 ccb->cgdl.status = 1239 CAM_GDEVLIST_LAST_DEVICE; 1240 ccb->cgdl.generation = 1241 device->generation; 1242 ccb->cgdl.index = i; 1243 /* 1244 * Fill in some CCB header fields 1245 * that the user may want. 1246 */ 1247 ccb->ccb_h.path_id = 1248 periph->path->bus->path_id; 1249 ccb->ccb_h.target_id = 1250 periph->path->target->target_id; 1251 ccb->ccb_h.target_lun = 1252 periph->path->device->lun_id; 1253 ccb->ccb_h.status = CAM_REQ_CMP; 1254 break; 1255 } 1256 } 1257 } 1258 1259 /* 1260 * If the periph is null here, one of two things has 1261 * happened. The first possibility is that we couldn't 1262 * find the unit number of the particular peripheral driver 1263 * that the user is asking about. e.g. the user asks for 1264 * the passthrough driver for "da11". We find the list of 1265 * "da" peripherals all right, but there is no unit 11. 1266 * The other possibility is that we went through the list 1267 * of peripheral drivers attached to the device structure, 1268 * but didn't find one with the name "pass". Either way, 1269 * we return ENOENT, since we couldn't find something. 1270 */ 1271 if (periph == NULL) { 1272 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1273 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1274 *ccb->cgdl.periph_name = '\0'; 1275 ccb->cgdl.unit_number = 0; 1276 error = ENOENT; 1277 /* 1278 * It is unfortunate that this is even necessary, 1279 * but there are many, many clueless users out there. 1280 * If this is true, the user is looking for the 1281 * passthrough driver, but doesn't have one in his 1282 * kernel. 1283 */ 1284 if (base_periph_found == 1) { 1285 printf("xptioctl: pass driver is not in the " 1286 "kernel\n"); 1287 printf("xptioctl: put \"device pass0\" in " 1288 "your kernel config file\n"); 1289 } 1290 } 1291 splx(s); 1292 break; 1293 } 1294 default: 1295 error = ENOTTY; 1296 break; 1297 } 1298 1299 return(error); 1300 } 1301 1302 /* Functions accessed by the peripheral drivers */ 1303 static void 1304 xpt_init(dummy) 1305 void *dummy; 1306 { 1307 struct cam_sim *xpt_sim; 1308 struct cam_path *path; 1309 struct cam_devq *devq; 1310 cam_status status; 1311 1312 TAILQ_INIT(&xpt_busses); 1313 TAILQ_INIT(&cam_bioq); 1314 TAILQ_INIT(&cam_netq); 1315 SLIST_INIT(&ccb_freeq); 1316 STAILQ_INIT(&highpowerq); 1317 1318 /* 1319 * The xpt layer is, itself, the equivelent of a SIM. 1320 * Allow 16 ccbs in the ccb pool for it. This should 1321 * give decent parallelism when we probe busses and 1322 * perform other XPT functions. 1323 */ 1324 devq = cam_simq_alloc(16); 1325 xpt_sim = cam_sim_alloc(xptaction, 1326 xptpoll, 1327 "xpt", 1328 /*softc*/NULL, 1329 /*unit*/0, 1330 /*max_dev_transactions*/0, 1331 /*max_tagged_dev_transactions*/0, 1332 devq); 1333 xpt_max_ccbs = 16; 1334 1335 xpt_bus_register(xpt_sim, /*bus #*/0); 1336 1337 /* 1338 * Looking at the XPT from the SIM layer, the XPT is 1339 * the equivelent of a peripheral driver. Allocate 1340 * a peripheral driver entry for us. 1341 */ 1342 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1343 CAM_TARGET_WILDCARD, 1344 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1345 printf("xpt_init: xpt_create_path failed with status %#x," 1346 " failing attach\n", status); 1347 return; 1348 } 1349 1350 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1351 path, NULL, 0, NULL); 1352 xpt_free_path(path); 1353 1354 xpt_sim->softc = xpt_periph; 1355 1356 /* 1357 * Register a callback for when interrupts are enabled. 1358 */ 1359 xpt_config_hook = 1360 (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook), 1361 M_TEMP, M_NOWAIT | M_ZERO); 1362 if (xpt_config_hook == NULL) { 1363 printf("xpt_init: Cannot malloc config hook " 1364 "- failing attach\n"); 1365 return; 1366 } 1367 1368 xpt_config_hook->ich_func = xpt_config; 1369 if (config_intrhook_establish(xpt_config_hook) != 0) { 1370 free (xpt_config_hook, M_TEMP); 1371 printf("xpt_init: config_intrhook_establish failed " 1372 "- failing attach\n"); 1373 } 1374 1375 /* Install our software interrupt handlers */ 1376 register_swi(SWI_CAMNET, swi_camnet); 1377 register_swi(SWI_CAMBIO, swi_cambio); 1378 } 1379 1380 static cam_status 1381 xptregister(struct cam_periph *periph, void *arg) 1382 { 1383 if (periph == NULL) { 1384 printf("xptregister: periph was NULL!!\n"); 1385 return(CAM_REQ_CMP_ERR); 1386 } 1387 1388 periph->softc = NULL; 1389 1390 xpt_periph = periph; 1391 1392 return(CAM_REQ_CMP); 1393 } 1394 1395 int32_t 1396 xpt_add_periph(struct cam_periph *periph) 1397 { 1398 struct cam_ed *device; 1399 int32_t status; 1400 struct periph_list *periph_head; 1401 1402 device = periph->path->device; 1403 1404 periph_head = &device->periphs; 1405 1406 status = CAM_REQ_CMP; 1407 1408 if (device != NULL) { 1409 int s; 1410 1411 /* 1412 * Make room for this peripheral 1413 * so it will fit in the queue 1414 * when it's scheduled to run 1415 */ 1416 s = splsoftcam(); 1417 status = camq_resize(&device->drvq, 1418 device->drvq.array_size + 1); 1419 1420 device->generation++; 1421 1422 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1423 1424 splx(s); 1425 } 1426 1427 xsoftc.generation++; 1428 1429 return (status); 1430 } 1431 1432 void 1433 xpt_remove_periph(struct cam_periph *periph) 1434 { 1435 struct cam_ed *device; 1436 1437 device = periph->path->device; 1438 1439 if (device != NULL) { 1440 int s; 1441 struct periph_list *periph_head; 1442 1443 periph_head = &device->periphs; 1444 1445 /* Release the slot for this peripheral */ 1446 s = splsoftcam(); 1447 camq_resize(&device->drvq, device->drvq.array_size - 1); 1448 1449 device->generation++; 1450 1451 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1452 1453 splx(s); 1454 } 1455 1456 xsoftc.generation++; 1457 1458 } 1459 1460 void 1461 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1462 { 1463 int s; 1464 u_int mb; 1465 struct cam_path *path; 1466 struct ccb_trans_settings cts; 1467 1468 path = periph->path; 1469 /* 1470 * To ensure that this is printed in one piece, 1471 * mask out CAM interrupts. 1472 */ 1473 s = splsoftcam(); 1474 printf("%s%d at %s%d bus %d target %d lun %d\n", 1475 periph->periph_name, periph->unit_number, 1476 path->bus->sim->sim_name, 1477 path->bus->sim->unit_number, 1478 path->bus->sim->bus_id, 1479 path->target->target_id, 1480 path->device->lun_id); 1481 printf("%s%d: ", periph->periph_name, periph->unit_number); 1482 scsi_print_inquiry(&path->device->inq_data); 1483 if ((bootverbose) 1484 && (path->device->serial_num_len > 0)) { 1485 /* Don't wrap the screen - print only the first 60 chars */ 1486 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1487 periph->unit_number, path->device->serial_num); 1488 } 1489 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1490 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1491 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1492 xpt_action((union ccb*)&cts); 1493 if (cts.ccb_h.status == CAM_REQ_CMP) { 1494 u_int speed; 1495 u_int freq; 1496 1497 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1498 && cts.sync_offset != 0) { 1499 freq = scsi_calc_syncsrate(cts.sync_period); 1500 speed = freq; 1501 } else { 1502 struct ccb_pathinq cpi; 1503 1504 /* Ask the SIM for its base transfer speed */ 1505 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1506 cpi.ccb_h.func_code = XPT_PATH_INQ; 1507 xpt_action((union ccb *)&cpi); 1508 1509 speed = cpi.base_transfer_speed; 1510 freq = 0; 1511 } 1512 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1513 speed *= (0x01 << cts.bus_width); 1514 mb = speed / 1000; 1515 if (mb > 0) 1516 printf("%s%d: %d.%03dMB/s transfers", 1517 periph->periph_name, periph->unit_number, 1518 mb, speed % 1000); 1519 else 1520 printf("%s%d: %dKB/s transfers", periph->periph_name, 1521 periph->unit_number, speed); 1522 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1523 && cts.sync_offset != 0) { 1524 printf(" (%d.%03dMHz, offset %d", freq / 1000, 1525 freq % 1000, cts.sync_offset); 1526 } 1527 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1528 && cts.bus_width > 0) { 1529 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1530 && cts.sync_offset != 0) { 1531 printf(", "); 1532 } else { 1533 printf(" ("); 1534 } 1535 printf("%dbit)", 8 * (0x01 << cts.bus_width)); 1536 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1537 && cts.sync_offset != 0) { 1538 printf(")"); 1539 } 1540 1541 if (path->device->inq_flags & SID_CmdQue 1542 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1543 printf(", Tagged Queueing Enabled"); 1544 } 1545 1546 printf("\n"); 1547 } else if (path->device->inq_flags & SID_CmdQue 1548 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1549 printf("%s%d: Tagged Queueing Enabled\n", 1550 periph->periph_name, periph->unit_number); 1551 } 1552 1553 /* 1554 * We only want to print the caller's announce string if they've 1555 * passed one in.. 1556 */ 1557 if (announce_string != NULL) 1558 printf("%s%d: %s\n", periph->periph_name, 1559 periph->unit_number, announce_string); 1560 splx(s); 1561 } 1562 1563 1564 static dev_match_ret 1565 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns, 1566 struct cam_eb *bus) 1567 { 1568 dev_match_ret retval; 1569 int i; 1570 1571 retval = DM_RET_NONE; 1572 1573 /* 1574 * If we aren't given something to match against, that's an error. 1575 */ 1576 if (bus == NULL) 1577 return(DM_RET_ERROR); 1578 1579 /* 1580 * If there are no match entries, then this bus matches no 1581 * matter what. 1582 */ 1583 if ((patterns == NULL) || (num_patterns == 0)) 1584 return(DM_RET_DESCEND | DM_RET_COPY); 1585 1586 for (i = 0; i < num_patterns; i++) { 1587 struct bus_match_pattern *cur_pattern; 1588 1589 /* 1590 * If the pattern in question isn't for a bus node, we 1591 * aren't interested. However, we do indicate to the 1592 * calling routine that we should continue descending the 1593 * tree, since the user wants to match against lower-level 1594 * EDT elements. 1595 */ 1596 if (patterns[i].type != DEV_MATCH_BUS) { 1597 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1598 retval |= DM_RET_DESCEND; 1599 continue; 1600 } 1601 1602 cur_pattern = &patterns[i].pattern.bus_pattern; 1603 1604 /* 1605 * If they want to match any bus node, we give them any 1606 * device node. 1607 */ 1608 if (cur_pattern->flags == BUS_MATCH_ANY) { 1609 /* set the copy flag */ 1610 retval |= DM_RET_COPY; 1611 1612 /* 1613 * If we've already decided on an action, go ahead 1614 * and return. 1615 */ 1616 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1617 return(retval); 1618 } 1619 1620 /* 1621 * Not sure why someone would do this... 1622 */ 1623 if (cur_pattern->flags == BUS_MATCH_NONE) 1624 continue; 1625 1626 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1627 && (cur_pattern->path_id != bus->path_id)) 1628 continue; 1629 1630 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1631 && (cur_pattern->bus_id != bus->sim->bus_id)) 1632 continue; 1633 1634 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1635 && (cur_pattern->unit_number != bus->sim->unit_number)) 1636 continue; 1637 1638 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1639 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1640 DEV_IDLEN) != 0)) 1641 continue; 1642 1643 /* 1644 * If we get to this point, the user definitely wants 1645 * information on this bus. So tell the caller to copy the 1646 * data out. 1647 */ 1648 retval |= DM_RET_COPY; 1649 1650 /* 1651 * If the return action has been set to descend, then we 1652 * know that we've already seen a non-bus matching 1653 * expression, therefore we need to further descend the tree. 1654 * This won't change by continuing around the loop, so we 1655 * go ahead and return. If we haven't seen a non-bus 1656 * matching expression, we keep going around the loop until 1657 * we exhaust the matching expressions. We'll set the stop 1658 * flag once we fall out of the loop. 1659 */ 1660 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1661 return(retval); 1662 } 1663 1664 /* 1665 * If the return action hasn't been set to descend yet, that means 1666 * we haven't seen anything other than bus matching patterns. So 1667 * tell the caller to stop descending the tree -- the user doesn't 1668 * want to match against lower level tree elements. 1669 */ 1670 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1671 retval |= DM_RET_STOP; 1672 1673 return(retval); 1674 } 1675 1676 static dev_match_ret 1677 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns, 1678 struct cam_ed *device) 1679 { 1680 dev_match_ret retval; 1681 int i; 1682 1683 retval = DM_RET_NONE; 1684 1685 /* 1686 * If we aren't given something to match against, that's an error. 1687 */ 1688 if (device == NULL) 1689 return(DM_RET_ERROR); 1690 1691 /* 1692 * If there are no match entries, then this device matches no 1693 * matter what. 1694 */ 1695 if ((patterns == NULL) || (patterns == 0)) 1696 return(DM_RET_DESCEND | DM_RET_COPY); 1697 1698 for (i = 0; i < num_patterns; i++) { 1699 struct device_match_pattern *cur_pattern; 1700 1701 /* 1702 * If the pattern in question isn't for a device node, we 1703 * aren't interested. 1704 */ 1705 if (patterns[i].type != DEV_MATCH_DEVICE) { 1706 if ((patterns[i].type == DEV_MATCH_PERIPH) 1707 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1708 retval |= DM_RET_DESCEND; 1709 continue; 1710 } 1711 1712 cur_pattern = &patterns[i].pattern.device_pattern; 1713 1714 /* 1715 * If they want to match any device node, we give them any 1716 * device node. 1717 */ 1718 if (cur_pattern->flags == DEV_MATCH_ANY) { 1719 /* set the copy flag */ 1720 retval |= DM_RET_COPY; 1721 1722 1723 /* 1724 * If we've already decided on an action, go ahead 1725 * and return. 1726 */ 1727 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1728 return(retval); 1729 } 1730 1731 /* 1732 * Not sure why someone would do this... 1733 */ 1734 if (cur_pattern->flags == DEV_MATCH_NONE) 1735 continue; 1736 1737 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1738 && (cur_pattern->path_id != device->target->bus->path_id)) 1739 continue; 1740 1741 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1742 && (cur_pattern->target_id != device->target->target_id)) 1743 continue; 1744 1745 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1746 && (cur_pattern->target_lun != device->lun_id)) 1747 continue; 1748 1749 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1750 && (cam_quirkmatch((caddr_t)&device->inq_data, 1751 (caddr_t)&cur_pattern->inq_pat, 1752 1, sizeof(cur_pattern->inq_pat), 1753 scsi_static_inquiry_match) == NULL)) 1754 continue; 1755 1756 /* 1757 * If we get to this point, the user definitely wants 1758 * information on this device. So tell the caller to copy 1759 * the data out. 1760 */ 1761 retval |= DM_RET_COPY; 1762 1763 /* 1764 * If the return action has been set to descend, then we 1765 * know that we've already seen a peripheral matching 1766 * expression, therefore we need to further descend the tree. 1767 * This won't change by continuing around the loop, so we 1768 * go ahead and return. If we haven't seen a peripheral 1769 * matching expression, we keep going around the loop until 1770 * we exhaust the matching expressions. We'll set the stop 1771 * flag once we fall out of the loop. 1772 */ 1773 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1774 return(retval); 1775 } 1776 1777 /* 1778 * If the return action hasn't been set to descend yet, that means 1779 * we haven't seen any peripheral matching patterns. So tell the 1780 * caller to stop descending the tree -- the user doesn't want to 1781 * match against lower level tree elements. 1782 */ 1783 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1784 retval |= DM_RET_STOP; 1785 1786 return(retval); 1787 } 1788 1789 /* 1790 * Match a single peripheral against any number of match patterns. 1791 */ 1792 static dev_match_ret 1793 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns, 1794 struct cam_periph *periph) 1795 { 1796 dev_match_ret retval; 1797 int i; 1798 1799 /* 1800 * If we aren't given something to match against, that's an error. 1801 */ 1802 if (periph == NULL) 1803 return(DM_RET_ERROR); 1804 1805 /* 1806 * If there are no match entries, then this peripheral matches no 1807 * matter what. 1808 */ 1809 if ((patterns == NULL) || (num_patterns == 0)) 1810 return(DM_RET_STOP | DM_RET_COPY); 1811 1812 /* 1813 * There aren't any nodes below a peripheral node, so there's no 1814 * reason to descend the tree any further. 1815 */ 1816 retval = DM_RET_STOP; 1817 1818 for (i = 0; i < num_patterns; i++) { 1819 struct periph_match_pattern *cur_pattern; 1820 1821 /* 1822 * If the pattern in question isn't for a peripheral, we 1823 * aren't interested. 1824 */ 1825 if (patterns[i].type != DEV_MATCH_PERIPH) 1826 continue; 1827 1828 cur_pattern = &patterns[i].pattern.periph_pattern; 1829 1830 /* 1831 * If they want to match on anything, then we will do so. 1832 */ 1833 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1834 /* set the copy flag */ 1835 retval |= DM_RET_COPY; 1836 1837 /* 1838 * We've already set the return action to stop, 1839 * since there are no nodes below peripherals in 1840 * the tree. 1841 */ 1842 return(retval); 1843 } 1844 1845 /* 1846 * Not sure why someone would do this... 1847 */ 1848 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1849 continue; 1850 1851 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1852 && (cur_pattern->path_id != periph->path->bus->path_id)) 1853 continue; 1854 1855 /* 1856 * For the target and lun id's, we have to make sure the 1857 * target and lun pointers aren't NULL. The xpt peripheral 1858 * has a wildcard target and device. 1859 */ 1860 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1861 && ((periph->path->target == NULL) 1862 ||(cur_pattern->target_id != periph->path->target->target_id))) 1863 continue; 1864 1865 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1866 && ((periph->path->device == NULL) 1867 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1868 continue; 1869 1870 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1871 && (cur_pattern->unit_number != periph->unit_number)) 1872 continue; 1873 1874 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1875 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1876 DEV_IDLEN) != 0)) 1877 continue; 1878 1879 /* 1880 * If we get to this point, the user definitely wants 1881 * information on this peripheral. So tell the caller to 1882 * copy the data out. 1883 */ 1884 retval |= DM_RET_COPY; 1885 1886 /* 1887 * The return action has already been set to stop, since 1888 * peripherals don't have any nodes below them in the EDT. 1889 */ 1890 return(retval); 1891 } 1892 1893 /* 1894 * If we get to this point, the peripheral that was passed in 1895 * doesn't match any of the patterns. 1896 */ 1897 return(retval); 1898 } 1899 1900 static int 1901 xptedtbusfunc(struct cam_eb *bus, void *arg) 1902 { 1903 struct ccb_dev_match *cdm; 1904 dev_match_ret retval; 1905 1906 cdm = (struct ccb_dev_match *)arg; 1907 1908 /* 1909 * If our position is for something deeper in the tree, that means 1910 * that we've already seen this node. So, we keep going down. 1911 */ 1912 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1913 && (cdm->pos.cookie.bus == bus) 1914 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1915 && (cdm->pos.cookie.target != NULL)) 1916 retval = DM_RET_DESCEND; 1917 else 1918 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1919 1920 /* 1921 * If we got an error, bail out of the search. 1922 */ 1923 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1924 cdm->status = CAM_DEV_MATCH_ERROR; 1925 return(0); 1926 } 1927 1928 /* 1929 * If the copy flag is set, copy this bus out. 1930 */ 1931 if (retval & DM_RET_COPY) { 1932 int spaceleft, j; 1933 1934 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1935 sizeof(struct dev_match_result)); 1936 1937 /* 1938 * If we don't have enough space to put in another 1939 * match result, save our position and tell the 1940 * user there are more devices to check. 1941 */ 1942 if (spaceleft < sizeof(struct dev_match_result)) { 1943 bzero(&cdm->pos, sizeof(cdm->pos)); 1944 cdm->pos.position_type = 1945 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1946 1947 cdm->pos.cookie.bus = bus; 1948 cdm->pos.generations[CAM_BUS_GENERATION]= 1949 bus_generation; 1950 cdm->status = CAM_DEV_MATCH_MORE; 1951 return(0); 1952 } 1953 j = cdm->num_matches; 1954 cdm->num_matches++; 1955 cdm->matches[j].type = DEV_MATCH_BUS; 1956 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1957 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1958 cdm->matches[j].result.bus_result.unit_number = 1959 bus->sim->unit_number; 1960 strncpy(cdm->matches[j].result.bus_result.dev_name, 1961 bus->sim->sim_name, DEV_IDLEN); 1962 } 1963 1964 /* 1965 * If the user is only interested in busses, there's no 1966 * reason to descend to the next level in the tree. 1967 */ 1968 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1969 return(1); 1970 1971 /* 1972 * If there is a target generation recorded, check it to 1973 * make sure the target list hasn't changed. 1974 */ 1975 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1976 && (bus == cdm->pos.cookie.bus) 1977 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1978 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1979 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1980 bus->generation)) { 1981 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1982 return(0); 1983 } 1984 1985 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1986 && (cdm->pos.cookie.bus == bus) 1987 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1988 && (cdm->pos.cookie.target != NULL)) 1989 return(xpttargettraverse(bus, 1990 (struct cam_et *)cdm->pos.cookie.target, 1991 xptedttargetfunc, arg)); 1992 else 1993 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1994 } 1995 1996 static int 1997 xptedttargetfunc(struct cam_et *target, void *arg) 1998 { 1999 struct ccb_dev_match *cdm; 2000 2001 cdm = (struct ccb_dev_match *)arg; 2002 2003 /* 2004 * If there is a device list generation recorded, check it to 2005 * make sure the device list hasn't changed. 2006 */ 2007 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2008 && (cdm->pos.cookie.bus == target->bus) 2009 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2010 && (cdm->pos.cookie.target == target) 2011 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2012 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2013 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2014 target->generation)) { 2015 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2016 return(0); 2017 } 2018 2019 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2020 && (cdm->pos.cookie.bus == target->bus) 2021 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2022 && (cdm->pos.cookie.target == target) 2023 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2024 && (cdm->pos.cookie.device != NULL)) 2025 return(xptdevicetraverse(target, 2026 (struct cam_ed *)cdm->pos.cookie.device, 2027 xptedtdevicefunc, arg)); 2028 else 2029 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2030 } 2031 2032 static int 2033 xptedtdevicefunc(struct cam_ed *device, void *arg) 2034 { 2035 2036 struct ccb_dev_match *cdm; 2037 dev_match_ret retval; 2038 2039 cdm = (struct ccb_dev_match *)arg; 2040 2041 /* 2042 * If our position is for something deeper in the tree, that means 2043 * that we've already seen this node. So, we keep going down. 2044 */ 2045 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2046 && (cdm->pos.cookie.device == device) 2047 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2048 && (cdm->pos.cookie.periph != NULL)) 2049 retval = DM_RET_DESCEND; 2050 else 2051 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2052 device); 2053 2054 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2055 cdm->status = CAM_DEV_MATCH_ERROR; 2056 return(0); 2057 } 2058 2059 /* 2060 * If the copy flag is set, copy this device out. 2061 */ 2062 if (retval & DM_RET_COPY) { 2063 int spaceleft, j; 2064 2065 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2066 sizeof(struct dev_match_result)); 2067 2068 /* 2069 * If we don't have enough space to put in another 2070 * match result, save our position and tell the 2071 * user there are more devices to check. 2072 */ 2073 if (spaceleft < sizeof(struct dev_match_result)) { 2074 bzero(&cdm->pos, sizeof(cdm->pos)); 2075 cdm->pos.position_type = 2076 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2077 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2078 2079 cdm->pos.cookie.bus = device->target->bus; 2080 cdm->pos.generations[CAM_BUS_GENERATION]= 2081 bus_generation; 2082 cdm->pos.cookie.target = device->target; 2083 cdm->pos.generations[CAM_TARGET_GENERATION] = 2084 device->target->bus->generation; 2085 cdm->pos.cookie.device = device; 2086 cdm->pos.generations[CAM_DEV_GENERATION] = 2087 device->target->generation; 2088 cdm->status = CAM_DEV_MATCH_MORE; 2089 return(0); 2090 } 2091 j = cdm->num_matches; 2092 cdm->num_matches++; 2093 cdm->matches[j].type = DEV_MATCH_DEVICE; 2094 cdm->matches[j].result.device_result.path_id = 2095 device->target->bus->path_id; 2096 cdm->matches[j].result.device_result.target_id = 2097 device->target->target_id; 2098 cdm->matches[j].result.device_result.target_lun = 2099 device->lun_id; 2100 bcopy(&device->inq_data, 2101 &cdm->matches[j].result.device_result.inq_data, 2102 sizeof(struct scsi_inquiry_data)); 2103 2104 /* Let the user know whether this device is unconfigured */ 2105 if (device->flags & CAM_DEV_UNCONFIGURED) 2106 cdm->matches[j].result.device_result.flags = 2107 DEV_RESULT_UNCONFIGURED; 2108 else 2109 cdm->matches[j].result.device_result.flags = 2110 DEV_RESULT_NOFLAG; 2111 } 2112 2113 /* 2114 * If the user isn't interested in peripherals, don't descend 2115 * the tree any further. 2116 */ 2117 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2118 return(1); 2119 2120 /* 2121 * If there is a peripheral list generation recorded, make sure 2122 * it hasn't changed. 2123 */ 2124 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2125 && (device->target->bus == cdm->pos.cookie.bus) 2126 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2127 && (device->target == cdm->pos.cookie.target) 2128 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2129 && (device == cdm->pos.cookie.device) 2130 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2131 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2132 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2133 device->generation)){ 2134 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2135 return(0); 2136 } 2137 2138 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2139 && (cdm->pos.cookie.bus == device->target->bus) 2140 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2141 && (cdm->pos.cookie.target == device->target) 2142 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2143 && (cdm->pos.cookie.device == device) 2144 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2145 && (cdm->pos.cookie.periph != NULL)) 2146 return(xptperiphtraverse(device, 2147 (struct cam_periph *)cdm->pos.cookie.periph, 2148 xptedtperiphfunc, arg)); 2149 else 2150 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2151 } 2152 2153 static int 2154 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2155 { 2156 struct ccb_dev_match *cdm; 2157 dev_match_ret retval; 2158 2159 cdm = (struct ccb_dev_match *)arg; 2160 2161 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2162 2163 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2164 cdm->status = CAM_DEV_MATCH_ERROR; 2165 return(0); 2166 } 2167 2168 /* 2169 * If the copy flag is set, copy this peripheral out. 2170 */ 2171 if (retval & DM_RET_COPY) { 2172 int spaceleft, j; 2173 2174 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2175 sizeof(struct dev_match_result)); 2176 2177 /* 2178 * If we don't have enough space to put in another 2179 * match result, save our position and tell the 2180 * user there are more devices to check. 2181 */ 2182 if (spaceleft < sizeof(struct dev_match_result)) { 2183 bzero(&cdm->pos, sizeof(cdm->pos)); 2184 cdm->pos.position_type = 2185 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2186 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2187 CAM_DEV_POS_PERIPH; 2188 2189 cdm->pos.cookie.bus = periph->path->bus; 2190 cdm->pos.generations[CAM_BUS_GENERATION]= 2191 bus_generation; 2192 cdm->pos.cookie.target = periph->path->target; 2193 cdm->pos.generations[CAM_TARGET_GENERATION] = 2194 periph->path->bus->generation; 2195 cdm->pos.cookie.device = periph->path->device; 2196 cdm->pos.generations[CAM_DEV_GENERATION] = 2197 periph->path->target->generation; 2198 cdm->pos.cookie.periph = periph; 2199 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2200 periph->path->device->generation; 2201 cdm->status = CAM_DEV_MATCH_MORE; 2202 return(0); 2203 } 2204 2205 j = cdm->num_matches; 2206 cdm->num_matches++; 2207 cdm->matches[j].type = DEV_MATCH_PERIPH; 2208 cdm->matches[j].result.periph_result.path_id = 2209 periph->path->bus->path_id; 2210 cdm->matches[j].result.periph_result.target_id = 2211 periph->path->target->target_id; 2212 cdm->matches[j].result.periph_result.target_lun = 2213 periph->path->device->lun_id; 2214 cdm->matches[j].result.periph_result.unit_number = 2215 periph->unit_number; 2216 strncpy(cdm->matches[j].result.periph_result.periph_name, 2217 periph->periph_name, DEV_IDLEN); 2218 } 2219 2220 return(1); 2221 } 2222 2223 static int 2224 xptedtmatch(struct ccb_dev_match *cdm) 2225 { 2226 int ret; 2227 2228 cdm->num_matches = 0; 2229 2230 /* 2231 * Check the bus list generation. If it has changed, the user 2232 * needs to reset everything and start over. 2233 */ 2234 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2235 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2236 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2237 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2238 return(0); 2239 } 2240 2241 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2242 && (cdm->pos.cookie.bus != NULL)) 2243 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2244 xptedtbusfunc, cdm); 2245 else 2246 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2247 2248 /* 2249 * If we get back 0, that means that we had to stop before fully 2250 * traversing the EDT. It also means that one of the subroutines 2251 * has set the status field to the proper value. If we get back 1, 2252 * we've fully traversed the EDT and copied out any matching entries. 2253 */ 2254 if (ret == 1) 2255 cdm->status = CAM_DEV_MATCH_LAST; 2256 2257 return(ret); 2258 } 2259 2260 static int 2261 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2262 { 2263 struct ccb_dev_match *cdm; 2264 2265 cdm = (struct ccb_dev_match *)arg; 2266 2267 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2268 && (cdm->pos.cookie.pdrv == pdrv) 2269 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2270 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2271 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2272 (*pdrv)->generation)) { 2273 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2274 return(0); 2275 } 2276 2277 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2278 && (cdm->pos.cookie.pdrv == pdrv) 2279 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2280 && (cdm->pos.cookie.periph != NULL)) 2281 return(xptpdperiphtraverse(pdrv, 2282 (struct cam_periph *)cdm->pos.cookie.periph, 2283 xptplistperiphfunc, arg)); 2284 else 2285 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2286 } 2287 2288 static int 2289 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2290 { 2291 struct ccb_dev_match *cdm; 2292 dev_match_ret retval; 2293 2294 cdm = (struct ccb_dev_match *)arg; 2295 2296 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2297 2298 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2299 cdm->status = CAM_DEV_MATCH_ERROR; 2300 return(0); 2301 } 2302 2303 /* 2304 * If the copy flag is set, copy this peripheral out. 2305 */ 2306 if (retval & DM_RET_COPY) { 2307 int spaceleft, j; 2308 2309 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2310 sizeof(struct dev_match_result)); 2311 2312 /* 2313 * If we don't have enough space to put in another 2314 * match result, save our position and tell the 2315 * user there are more devices to check. 2316 */ 2317 if (spaceleft < sizeof(struct dev_match_result)) { 2318 struct periph_driver **pdrv; 2319 2320 pdrv = NULL; 2321 bzero(&cdm->pos, sizeof(cdm->pos)); 2322 cdm->pos.position_type = 2323 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2324 CAM_DEV_POS_PERIPH; 2325 2326 /* 2327 * This may look a bit non-sensical, but it is 2328 * actually quite logical. There are very few 2329 * peripheral drivers, and bloating every peripheral 2330 * structure with a pointer back to its parent 2331 * peripheral driver linker set entry would cost 2332 * more in the long run than doing this quick lookup. 2333 */ 2334 for (pdrv = 2335 (struct periph_driver **)periphdriver_set.ls_items; 2336 *pdrv != NULL; pdrv++) { 2337 if (strcmp((*pdrv)->driver_name, 2338 periph->periph_name) == 0) 2339 break; 2340 } 2341 2342 if (pdrv == NULL) { 2343 cdm->status = CAM_DEV_MATCH_ERROR; 2344 return(0); 2345 } 2346 2347 cdm->pos.cookie.pdrv = pdrv; 2348 /* 2349 * The periph generation slot does double duty, as 2350 * does the periph pointer slot. They are used for 2351 * both edt and pdrv lookups and positioning. 2352 */ 2353 cdm->pos.cookie.periph = periph; 2354 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2355 (*pdrv)->generation; 2356 cdm->status = CAM_DEV_MATCH_MORE; 2357 return(0); 2358 } 2359 2360 j = cdm->num_matches; 2361 cdm->num_matches++; 2362 cdm->matches[j].type = DEV_MATCH_PERIPH; 2363 cdm->matches[j].result.periph_result.path_id = 2364 periph->path->bus->path_id; 2365 2366 /* 2367 * The transport layer peripheral doesn't have a target or 2368 * lun. 2369 */ 2370 if (periph->path->target) 2371 cdm->matches[j].result.periph_result.target_id = 2372 periph->path->target->target_id; 2373 else 2374 cdm->matches[j].result.periph_result.target_id = -1; 2375 2376 if (periph->path->device) 2377 cdm->matches[j].result.periph_result.target_lun = 2378 periph->path->device->lun_id; 2379 else 2380 cdm->matches[j].result.periph_result.target_lun = -1; 2381 2382 cdm->matches[j].result.periph_result.unit_number = 2383 periph->unit_number; 2384 strncpy(cdm->matches[j].result.periph_result.periph_name, 2385 periph->periph_name, DEV_IDLEN); 2386 } 2387 2388 return(1); 2389 } 2390 2391 static int 2392 xptperiphlistmatch(struct ccb_dev_match *cdm) 2393 { 2394 int ret; 2395 2396 cdm->num_matches = 0; 2397 2398 /* 2399 * At this point in the edt traversal function, we check the bus 2400 * list generation to make sure that no busses have been added or 2401 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2402 * For the peripheral driver list traversal function, however, we 2403 * don't have to worry about new peripheral driver types coming or 2404 * going; they're in a linker set, and therefore can't change 2405 * without a recompile. 2406 */ 2407 2408 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2409 && (cdm->pos.cookie.pdrv != NULL)) 2410 ret = xptpdrvtraverse( 2411 (struct periph_driver **)cdm->pos.cookie.pdrv, 2412 xptplistpdrvfunc, cdm); 2413 else 2414 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2415 2416 /* 2417 * If we get back 0, that means that we had to stop before fully 2418 * traversing the peripheral driver tree. It also means that one of 2419 * the subroutines has set the status field to the proper value. If 2420 * we get back 1, we've fully traversed the EDT and copied out any 2421 * matching entries. 2422 */ 2423 if (ret == 1) 2424 cdm->status = CAM_DEV_MATCH_LAST; 2425 2426 return(ret); 2427 } 2428 2429 static int 2430 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2431 { 2432 struct cam_eb *bus, *next_bus; 2433 int retval; 2434 2435 retval = 1; 2436 2437 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2438 bus != NULL; 2439 bus = next_bus) { 2440 next_bus = TAILQ_NEXT(bus, links); 2441 2442 retval = tr_func(bus, arg); 2443 if (retval == 0) 2444 return(retval); 2445 } 2446 2447 return(retval); 2448 } 2449 2450 static int 2451 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2452 xpt_targetfunc_t *tr_func, void *arg) 2453 { 2454 struct cam_et *target, *next_target; 2455 int retval; 2456 2457 retval = 1; 2458 for (target = (start_target ? start_target : 2459 TAILQ_FIRST(&bus->et_entries)); 2460 target != NULL; target = next_target) { 2461 2462 next_target = TAILQ_NEXT(target, links); 2463 2464 retval = tr_func(target, arg); 2465 2466 if (retval == 0) 2467 return(retval); 2468 } 2469 2470 return(retval); 2471 } 2472 2473 static int 2474 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2475 xpt_devicefunc_t *tr_func, void *arg) 2476 { 2477 struct cam_ed *device, *next_device; 2478 int retval; 2479 2480 retval = 1; 2481 for (device = (start_device ? start_device : 2482 TAILQ_FIRST(&target->ed_entries)); 2483 device != NULL; 2484 device = next_device) { 2485 2486 next_device = TAILQ_NEXT(device, links); 2487 2488 retval = tr_func(device, arg); 2489 2490 if (retval == 0) 2491 return(retval); 2492 } 2493 2494 return(retval); 2495 } 2496 2497 static int 2498 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2499 xpt_periphfunc_t *tr_func, void *arg) 2500 { 2501 struct cam_periph *periph, *next_periph; 2502 int retval; 2503 2504 retval = 1; 2505 2506 for (periph = (start_periph ? start_periph : 2507 SLIST_FIRST(&device->periphs)); 2508 periph != NULL; 2509 periph = next_periph) { 2510 2511 next_periph = SLIST_NEXT(periph, periph_links); 2512 2513 retval = tr_func(periph, arg); 2514 if (retval == 0) 2515 return(retval); 2516 } 2517 2518 return(retval); 2519 } 2520 2521 static int 2522 xptpdrvtraverse(struct periph_driver **start_pdrv, 2523 xpt_pdrvfunc_t *tr_func, void *arg) 2524 { 2525 struct periph_driver **pdrv; 2526 int retval; 2527 2528 retval = 1; 2529 2530 /* 2531 * We don't traverse the peripheral driver list like we do the 2532 * other lists, because it is a linker set, and therefore cannot be 2533 * changed during runtime. If the peripheral driver list is ever 2534 * re-done to be something other than a linker set (i.e. it can 2535 * change while the system is running), the list traversal should 2536 * be modified to work like the other traversal functions. 2537 */ 2538 for (pdrv = (start_pdrv ? start_pdrv : 2539 (struct periph_driver **)periphdriver_set.ls_items); 2540 *pdrv != NULL; pdrv++) { 2541 retval = tr_func(pdrv, arg); 2542 2543 if (retval == 0) 2544 return(retval); 2545 } 2546 2547 return(retval); 2548 } 2549 2550 static int 2551 xptpdperiphtraverse(struct periph_driver **pdrv, 2552 struct cam_periph *start_periph, 2553 xpt_periphfunc_t *tr_func, void *arg) 2554 { 2555 struct cam_periph *periph, *next_periph; 2556 int retval; 2557 2558 retval = 1; 2559 2560 for (periph = (start_periph ? start_periph : 2561 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2562 periph = next_periph) { 2563 2564 next_periph = TAILQ_NEXT(periph, unit_links); 2565 2566 retval = tr_func(periph, arg); 2567 if (retval == 0) 2568 return(retval); 2569 } 2570 return(retval); 2571 } 2572 2573 static int 2574 xptdefbusfunc(struct cam_eb *bus, void *arg) 2575 { 2576 struct xpt_traverse_config *tr_config; 2577 2578 tr_config = (struct xpt_traverse_config *)arg; 2579 2580 if (tr_config->depth == XPT_DEPTH_BUS) { 2581 xpt_busfunc_t *tr_func; 2582 2583 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2584 2585 return(tr_func(bus, tr_config->tr_arg)); 2586 } else 2587 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2588 } 2589 2590 static int 2591 xptdeftargetfunc(struct cam_et *target, void *arg) 2592 { 2593 struct xpt_traverse_config *tr_config; 2594 2595 tr_config = (struct xpt_traverse_config *)arg; 2596 2597 if (tr_config->depth == XPT_DEPTH_TARGET) { 2598 xpt_targetfunc_t *tr_func; 2599 2600 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2601 2602 return(tr_func(target, tr_config->tr_arg)); 2603 } else 2604 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2605 } 2606 2607 static int 2608 xptdefdevicefunc(struct cam_ed *device, void *arg) 2609 { 2610 struct xpt_traverse_config *tr_config; 2611 2612 tr_config = (struct xpt_traverse_config *)arg; 2613 2614 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2615 xpt_devicefunc_t *tr_func; 2616 2617 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2618 2619 return(tr_func(device, tr_config->tr_arg)); 2620 } else 2621 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2622 } 2623 2624 static int 2625 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2626 { 2627 struct xpt_traverse_config *tr_config; 2628 xpt_periphfunc_t *tr_func; 2629 2630 tr_config = (struct xpt_traverse_config *)arg; 2631 2632 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2633 2634 /* 2635 * Unlike the other default functions, we don't check for depth 2636 * here. The peripheral driver level is the last level in the EDT, 2637 * so if we're here, we should execute the function in question. 2638 */ 2639 return(tr_func(periph, tr_config->tr_arg)); 2640 } 2641 2642 /* 2643 * Execute the given function for every bus in the EDT. 2644 */ 2645 static int 2646 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2647 { 2648 struct xpt_traverse_config tr_config; 2649 2650 tr_config.depth = XPT_DEPTH_BUS; 2651 tr_config.tr_func = tr_func; 2652 tr_config.tr_arg = arg; 2653 2654 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2655 } 2656 2657 #ifdef notusedyet 2658 /* 2659 * Execute the given function for every target in the EDT. 2660 */ 2661 static int 2662 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2663 { 2664 struct xpt_traverse_config tr_config; 2665 2666 tr_config.depth = XPT_DEPTH_TARGET; 2667 tr_config.tr_func = tr_func; 2668 tr_config.tr_arg = arg; 2669 2670 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2671 } 2672 #endif /* notusedyet */ 2673 2674 /* 2675 * Execute the given function for every device in the EDT. 2676 */ 2677 static int 2678 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2679 { 2680 struct xpt_traverse_config tr_config; 2681 2682 tr_config.depth = XPT_DEPTH_DEVICE; 2683 tr_config.tr_func = tr_func; 2684 tr_config.tr_arg = arg; 2685 2686 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2687 } 2688 2689 #ifdef notusedyet 2690 /* 2691 * Execute the given function for every peripheral in the EDT. 2692 */ 2693 static int 2694 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2695 { 2696 struct xpt_traverse_config tr_config; 2697 2698 tr_config.depth = XPT_DEPTH_PERIPH; 2699 tr_config.tr_func = tr_func; 2700 tr_config.tr_arg = arg; 2701 2702 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2703 } 2704 #endif /* notusedyet */ 2705 2706 static int 2707 xptsetasyncfunc(struct cam_ed *device, void *arg) 2708 { 2709 struct cam_path path; 2710 struct ccb_getdev cgd; 2711 struct async_node *cur_entry; 2712 2713 cur_entry = (struct async_node *)arg; 2714 2715 /* 2716 * Don't report unconfigured devices (Wildcard devs, 2717 * devices only for target mode, device instances 2718 * that have been invalidated but are waiting for 2719 * their last reference count to be released). 2720 */ 2721 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2722 return (1); 2723 2724 xpt_compile_path(&path, 2725 NULL, 2726 device->target->bus->path_id, 2727 device->target->target_id, 2728 device->lun_id); 2729 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2730 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2731 xpt_action((union ccb *)&cgd); 2732 cur_entry->callback(cur_entry->callback_arg, 2733 AC_FOUND_DEVICE, 2734 &path, &cgd); 2735 xpt_release_path(&path); 2736 2737 return(1); 2738 } 2739 2740 static int 2741 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2742 { 2743 struct cam_path path; 2744 struct ccb_pathinq cpi; 2745 struct async_node *cur_entry; 2746 2747 cur_entry = (struct async_node *)arg; 2748 2749 xpt_compile_path(&path, /*periph*/NULL, 2750 bus->sim->path_id, 2751 CAM_TARGET_WILDCARD, 2752 CAM_LUN_WILDCARD); 2753 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2754 cpi.ccb_h.func_code = XPT_PATH_INQ; 2755 xpt_action((union ccb *)&cpi); 2756 cur_entry->callback(cur_entry->callback_arg, 2757 AC_PATH_REGISTERED, 2758 &path, &cpi); 2759 xpt_release_path(&path); 2760 2761 return(1); 2762 } 2763 2764 void 2765 xpt_action(union ccb *start_ccb) 2766 { 2767 int iopl; 2768 2769 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2770 2771 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2772 2773 iopl = splsoftcam(); 2774 switch (start_ccb->ccb_h.func_code) { 2775 case XPT_SCSI_IO: 2776 { 2777 #ifdef CAMDEBUG 2778 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2779 struct cam_path *path; 2780 2781 path = start_ccb->ccb_h.path; 2782 #endif 2783 2784 /* 2785 * For the sake of compatibility with SCSI-1 2786 * devices that may not understand the identify 2787 * message, we include lun information in the 2788 * second byte of all commands. SCSI-1 specifies 2789 * that luns are a 3 bit value and reserves only 3 2790 * bits for lun information in the CDB. Later 2791 * revisions of the SCSI spec allow for more than 8 2792 * luns, but have deprecated lun information in the 2793 * CDB. So, if the lun won't fit, we must omit. 2794 * 2795 * Also be aware that during initial probing for devices, 2796 * the inquiry information is unknown but initialized to 0. 2797 * This means that this code will be exercised while probing 2798 * devices with an ANSI revision greater than 2. 2799 */ 2800 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2801 && start_ccb->ccb_h.target_lun < 8 2802 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2803 2804 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2805 start_ccb->ccb_h.target_lun << 5; 2806 } 2807 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2808 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2809 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2810 &path->device->inq_data), 2811 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2812 cdb_str, sizeof(cdb_str)))); 2813 /* FALLTHROUGH */ 2814 } 2815 case XPT_TARGET_IO: 2816 case XPT_CONT_TARGET_IO: 2817 start_ccb->csio.sense_resid = 0; 2818 start_ccb->csio.resid = 0; 2819 /* FALLTHROUGH */ 2820 case XPT_RESET_DEV: 2821 case XPT_ENG_EXEC: 2822 { 2823 struct cam_path *path; 2824 int s; 2825 int runq; 2826 2827 path = start_ccb->ccb_h.path; 2828 s = splsoftcam(); 2829 2830 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2831 if (path->device->qfrozen_cnt == 0) 2832 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2833 else 2834 runq = 0; 2835 splx(s); 2836 if (runq != 0) 2837 xpt_run_dev_sendq(path->bus); 2838 break; 2839 } 2840 case XPT_SET_TRAN_SETTINGS: 2841 { 2842 xpt_set_transfer_settings(&start_ccb->cts, 2843 start_ccb->ccb_h.path->device, 2844 /*async_update*/FALSE); 2845 break; 2846 } 2847 case XPT_CALC_GEOMETRY: 2848 { 2849 struct cam_sim *sim; 2850 2851 /* Filter out garbage */ 2852 if (start_ccb->ccg.block_size == 0 2853 || start_ccb->ccg.volume_size == 0) { 2854 start_ccb->ccg.cylinders = 0; 2855 start_ccb->ccg.heads = 0; 2856 start_ccb->ccg.secs_per_track = 0; 2857 start_ccb->ccb_h.status = CAM_REQ_CMP; 2858 break; 2859 } 2860 #ifdef PC98 2861 /* 2862 * In a PC-98 system, geometry translation depens on 2863 * the "real" device geometry obtained from mode page 4. 2864 * SCSI geometry translation is performed in the 2865 * initialization routine of the SCSI BIOS and the result 2866 * stored in host memory. If the translation is available 2867 * in host memory, use it. If not, rely on the default 2868 * translation the device driver performs. 2869 */ 2870 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2871 start_ccb->ccb_h.status = CAM_REQ_CMP; 2872 break; 2873 } 2874 #endif 2875 sim = start_ccb->ccb_h.path->bus->sim; 2876 (*(sim->sim_action))(sim, start_ccb); 2877 break; 2878 } 2879 case XPT_ABORT: 2880 { 2881 union ccb* abort_ccb; 2882 int s; 2883 2884 abort_ccb = start_ccb->cab.abort_ccb; 2885 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2886 2887 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2888 struct cam_ccbq *ccbq; 2889 2890 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 2891 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2892 abort_ccb->ccb_h.status = 2893 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2894 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2895 s = splcam(); 2896 xpt_done(abort_ccb); 2897 splx(s); 2898 start_ccb->ccb_h.status = CAM_REQ_CMP; 2899 break; 2900 } 2901 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2902 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2903 /* 2904 * We've caught this ccb en route to 2905 * the SIM. Flag it for abort and the 2906 * SIM will do so just before starting 2907 * real work on the CCB. 2908 */ 2909 abort_ccb->ccb_h.status = 2910 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2911 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2912 start_ccb->ccb_h.status = CAM_REQ_CMP; 2913 break; 2914 } 2915 } 2916 if (XPT_FC_IS_QUEUED(abort_ccb) 2917 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2918 /* 2919 * It's already completed but waiting 2920 * for our SWI to get to it. 2921 */ 2922 start_ccb->ccb_h.status = CAM_UA_ABORT; 2923 break; 2924 } 2925 /* 2926 * If we weren't able to take care of the abort request 2927 * in the XPT, pass the request down to the SIM for processing. 2928 */ 2929 /* FALLTHROUGH */ 2930 } 2931 case XPT_ACCEPT_TARGET_IO: 2932 case XPT_EN_LUN: 2933 case XPT_IMMED_NOTIFY: 2934 case XPT_NOTIFY_ACK: 2935 case XPT_GET_TRAN_SETTINGS: 2936 case XPT_RESET_BUS: 2937 { 2938 struct cam_sim *sim; 2939 2940 sim = start_ccb->ccb_h.path->bus->sim; 2941 (*(sim->sim_action))(sim, start_ccb); 2942 break; 2943 } 2944 case XPT_PATH_INQ: 2945 { 2946 struct cam_sim *sim; 2947 2948 sim = start_ccb->ccb_h.path->bus->sim; 2949 (*(sim->sim_action))(sim, start_ccb); 2950 break; 2951 } 2952 case XPT_PATH_STATS: 2953 start_ccb->cpis.last_reset = 2954 start_ccb->ccb_h.path->bus->last_reset; 2955 start_ccb->ccb_h.status = CAM_REQ_CMP; 2956 break; 2957 case XPT_GDEV_TYPE: 2958 { 2959 struct cam_ed *dev; 2960 int s; 2961 2962 dev = start_ccb->ccb_h.path->device; 2963 s = splcam(); 2964 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2965 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2966 } else { 2967 struct ccb_getdev *cgd; 2968 struct cam_eb *bus; 2969 struct cam_et *tar; 2970 2971 cgd = &start_ccb->cgd; 2972 bus = cgd->ccb_h.path->bus; 2973 tar = cgd->ccb_h.path->target; 2974 cgd->inq_data = dev->inq_data; 2975 cgd->ccb_h.status = CAM_REQ_CMP; 2976 cgd->serial_num_len = dev->serial_num_len; 2977 if ((dev->serial_num_len > 0) 2978 && (dev->serial_num != NULL)) 2979 bcopy(dev->serial_num, cgd->serial_num, 2980 dev->serial_num_len); 2981 } 2982 splx(s); 2983 break; 2984 } 2985 case XPT_GDEV_STATS: 2986 { 2987 struct cam_ed *dev; 2988 int s; 2989 2990 dev = start_ccb->ccb_h.path->device; 2991 s = splcam(); 2992 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2993 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2994 } else { 2995 struct ccb_getdevstats *cgds; 2996 struct cam_eb *bus; 2997 struct cam_et *tar; 2998 2999 cgds = &start_ccb->cgds; 3000 bus = cgds->ccb_h.path->bus; 3001 tar = cgds->ccb_h.path->target; 3002 cgds->dev_openings = dev->ccbq.dev_openings; 3003 cgds->dev_active = dev->ccbq.dev_active; 3004 cgds->devq_openings = dev->ccbq.devq_openings; 3005 cgds->devq_queued = dev->ccbq.queue.entries; 3006 cgds->held = dev->ccbq.held; 3007 cgds->last_reset = tar->last_reset; 3008 cgds->maxtags = dev->quirk->maxtags; 3009 cgds->mintags = dev->quirk->mintags; 3010 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3011 cgds->last_reset = bus->last_reset; 3012 cgds->ccb_h.status = CAM_REQ_CMP; 3013 } 3014 splx(s); 3015 break; 3016 } 3017 case XPT_GDEVLIST: 3018 { 3019 struct cam_periph *nperiph; 3020 struct periph_list *periph_head; 3021 struct ccb_getdevlist *cgdl; 3022 int i; 3023 int s; 3024 struct cam_ed *device; 3025 int found; 3026 3027 3028 found = 0; 3029 3030 /* 3031 * Don't want anyone mucking with our data. 3032 */ 3033 s = splcam(); 3034 device = start_ccb->ccb_h.path->device; 3035 periph_head = &device->periphs; 3036 cgdl = &start_ccb->cgdl; 3037 3038 /* 3039 * Check and see if the list has changed since the user 3040 * last requested a list member. If so, tell them that the 3041 * list has changed, and therefore they need to start over 3042 * from the beginning. 3043 */ 3044 if ((cgdl->index != 0) && 3045 (cgdl->generation != device->generation)) { 3046 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3047 splx(s); 3048 break; 3049 } 3050 3051 /* 3052 * Traverse the list of peripherals and attempt to find 3053 * the requested peripheral. 3054 */ 3055 for (nperiph = periph_head->slh_first, i = 0; 3056 (nperiph != NULL) && (i <= cgdl->index); 3057 nperiph = nperiph->periph_links.sle_next, i++) { 3058 if (i == cgdl->index) { 3059 strncpy(cgdl->periph_name, 3060 nperiph->periph_name, 3061 DEV_IDLEN); 3062 cgdl->unit_number = nperiph->unit_number; 3063 found = 1; 3064 } 3065 } 3066 if (found == 0) { 3067 cgdl->status = CAM_GDEVLIST_ERROR; 3068 splx(s); 3069 break; 3070 } 3071 3072 if (nperiph == NULL) 3073 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3074 else 3075 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3076 3077 cgdl->index++; 3078 cgdl->generation = device->generation; 3079 3080 splx(s); 3081 cgdl->ccb_h.status = CAM_REQ_CMP; 3082 break; 3083 } 3084 case XPT_DEV_MATCH: 3085 { 3086 int s; 3087 dev_pos_type position_type; 3088 struct ccb_dev_match *cdm; 3089 int ret; 3090 3091 cdm = &start_ccb->cdm; 3092 3093 /* 3094 * Prevent EDT changes while we traverse it. 3095 */ 3096 s = splcam(); 3097 /* 3098 * There are two ways of getting at information in the EDT. 3099 * The first way is via the primary EDT tree. It starts 3100 * with a list of busses, then a list of targets on a bus, 3101 * then devices/luns on a target, and then peripherals on a 3102 * device/lun. The "other" way is by the peripheral driver 3103 * lists. The peripheral driver lists are organized by 3104 * peripheral driver. (obviously) So it makes sense to 3105 * use the peripheral driver list if the user is looking 3106 * for something like "da1", or all "da" devices. If the 3107 * user is looking for something on a particular bus/target 3108 * or lun, it's generally better to go through the EDT tree. 3109 */ 3110 3111 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3112 position_type = cdm->pos.position_type; 3113 else { 3114 int i; 3115 3116 position_type = CAM_DEV_POS_NONE; 3117 3118 for (i = 0; i < cdm->num_patterns; i++) { 3119 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3120 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3121 position_type = CAM_DEV_POS_EDT; 3122 break; 3123 } 3124 } 3125 3126 if (cdm->num_patterns == 0) 3127 position_type = CAM_DEV_POS_EDT; 3128 else if (position_type == CAM_DEV_POS_NONE) 3129 position_type = CAM_DEV_POS_PDRV; 3130 } 3131 3132 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3133 case CAM_DEV_POS_EDT: 3134 ret = xptedtmatch(cdm); 3135 break; 3136 case CAM_DEV_POS_PDRV: 3137 ret = xptperiphlistmatch(cdm); 3138 break; 3139 default: 3140 cdm->status = CAM_DEV_MATCH_ERROR; 3141 break; 3142 } 3143 3144 splx(s); 3145 3146 if (cdm->status == CAM_DEV_MATCH_ERROR) 3147 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3148 else 3149 start_ccb->ccb_h.status = CAM_REQ_CMP; 3150 3151 break; 3152 } 3153 case XPT_SASYNC_CB: 3154 { 3155 struct ccb_setasync *csa; 3156 struct async_node *cur_entry; 3157 struct async_list *async_head; 3158 u_int32_t added; 3159 int s; 3160 3161 csa = &start_ccb->csa; 3162 added = csa->event_enable; 3163 async_head = &csa->ccb_h.path->device->asyncs; 3164 3165 /* 3166 * If there is already an entry for us, simply 3167 * update it. 3168 */ 3169 s = splcam(); 3170 cur_entry = SLIST_FIRST(async_head); 3171 while (cur_entry != NULL) { 3172 if ((cur_entry->callback_arg == csa->callback_arg) 3173 && (cur_entry->callback == csa->callback)) 3174 break; 3175 cur_entry = SLIST_NEXT(cur_entry, links); 3176 } 3177 3178 if (cur_entry != NULL) { 3179 /* 3180 * If the request has no flags set, 3181 * remove the entry. 3182 */ 3183 added &= ~cur_entry->event_enable; 3184 if (csa->event_enable == 0) { 3185 SLIST_REMOVE(async_head, cur_entry, 3186 async_node, links); 3187 csa->ccb_h.path->device->refcount--; 3188 free(cur_entry, M_DEVBUF); 3189 } else { 3190 cur_entry->event_enable = csa->event_enable; 3191 } 3192 } else { 3193 cur_entry = malloc(sizeof(*cur_entry), M_DEVBUF, 3194 M_NOWAIT); 3195 if (cur_entry == NULL) { 3196 splx(s); 3197 csa->ccb_h.status = CAM_RESRC_UNAVAIL; 3198 break; 3199 } 3200 cur_entry->event_enable = csa->event_enable; 3201 cur_entry->callback_arg = csa->callback_arg; 3202 cur_entry->callback = csa->callback; 3203 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3204 csa->ccb_h.path->device->refcount++; 3205 } 3206 3207 if ((added & AC_FOUND_DEVICE) != 0) { 3208 /* 3209 * Get this peripheral up to date with all 3210 * the currently existing devices. 3211 */ 3212 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3213 } 3214 if ((added & AC_PATH_REGISTERED) != 0) { 3215 /* 3216 * Get this peripheral up to date with all 3217 * the currently existing busses. 3218 */ 3219 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3220 } 3221 splx(s); 3222 start_ccb->ccb_h.status = CAM_REQ_CMP; 3223 break; 3224 } 3225 case XPT_REL_SIMQ: 3226 { 3227 struct ccb_relsim *crs; 3228 struct cam_ed *dev; 3229 int s; 3230 3231 crs = &start_ccb->crs; 3232 dev = crs->ccb_h.path->device; 3233 if (dev == NULL) { 3234 3235 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3236 break; 3237 } 3238 3239 s = splcam(); 3240 3241 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3242 3243 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3244 3245 /* Don't ever go below one opening */ 3246 if (crs->openings > 0) { 3247 xpt_dev_ccbq_resize(crs->ccb_h.path, 3248 crs->openings); 3249 3250 if (bootverbose) { 3251 xpt_print_path(crs->ccb_h.path); 3252 printf("tagged openings " 3253 "now %d\n", 3254 crs->openings); 3255 } 3256 } 3257 } 3258 } 3259 3260 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3261 3262 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3263 3264 /* 3265 * Just extend the old timeout and decrement 3266 * the freeze count so that a single timeout 3267 * is sufficient for releasing the queue. 3268 */ 3269 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3270 untimeout(xpt_release_devq_timeout, 3271 dev, dev->c_handle); 3272 } else { 3273 3274 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3275 } 3276 3277 dev->c_handle = 3278 timeout(xpt_release_devq_timeout, 3279 dev, 3280 (crs->release_timeout * hz) / 1000); 3281 3282 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3283 3284 } 3285 3286 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3287 3288 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3289 /* 3290 * Decrement the freeze count so that a single 3291 * completion is still sufficient to unfreeze 3292 * the queue. 3293 */ 3294 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3295 } else { 3296 3297 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3298 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3299 } 3300 } 3301 3302 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3303 3304 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3305 || (dev->ccbq.dev_active == 0)) { 3306 3307 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3308 } else { 3309 3310 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3311 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3312 } 3313 } 3314 splx(s); 3315 3316 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3317 3318 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3319 /*run_queue*/TRUE); 3320 } 3321 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3322 start_ccb->ccb_h.status = CAM_REQ_CMP; 3323 break; 3324 } 3325 case XPT_SCAN_BUS: 3326 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3327 break; 3328 case XPT_SCAN_LUN: 3329 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3330 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3331 start_ccb); 3332 break; 3333 case XPT_DEBUG: { 3334 #ifdef CAMDEBUG 3335 int s; 3336 3337 s = splcam(); 3338 #ifdef CAM_DEBUG_DELAY 3339 cam_debug_delay = CAM_DEBUG_DELAY; 3340 #endif 3341 cam_dflags = start_ccb->cdbg.flags; 3342 if (cam_dpath != NULL) { 3343 xpt_free_path(cam_dpath); 3344 cam_dpath = NULL; 3345 } 3346 3347 if (cam_dflags != CAM_DEBUG_NONE) { 3348 if (xpt_create_path(&cam_dpath, xpt_periph, 3349 start_ccb->ccb_h.path_id, 3350 start_ccb->ccb_h.target_id, 3351 start_ccb->ccb_h.target_lun) != 3352 CAM_REQ_CMP) { 3353 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3354 cam_dflags = CAM_DEBUG_NONE; 3355 } else { 3356 start_ccb->ccb_h.status = CAM_REQ_CMP; 3357 xpt_print_path(cam_dpath); 3358 printf("debugging flags now %x\n", cam_dflags); 3359 } 3360 } else { 3361 cam_dpath = NULL; 3362 start_ccb->ccb_h.status = CAM_REQ_CMP; 3363 } 3364 splx(s); 3365 #else /* !CAMDEBUG */ 3366 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3367 #endif /* CAMDEBUG */ 3368 break; 3369 } 3370 case XPT_NOOP: 3371 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3372 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3373 start_ccb->ccb_h.status = CAM_REQ_CMP; 3374 break; 3375 default: 3376 case XPT_SDEV_TYPE: 3377 case XPT_TERM_IO: 3378 case XPT_ENG_INQ: 3379 /* XXX Implement */ 3380 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3381 break; 3382 } 3383 splx(iopl); 3384 } 3385 3386 void 3387 xpt_polled_action(union ccb *start_ccb) 3388 { 3389 int s; 3390 u_int32_t timeout; 3391 struct cam_sim *sim; 3392 struct cam_devq *devq; 3393 struct cam_ed *dev; 3394 3395 timeout = start_ccb->ccb_h.timeout; 3396 sim = start_ccb->ccb_h.path->bus->sim; 3397 devq = sim->devq; 3398 dev = start_ccb->ccb_h.path->device; 3399 3400 s = splcam(); 3401 3402 /* 3403 * Steal an opening so that no other queued requests 3404 * can get it before us while we simulate interrupts. 3405 */ 3406 dev->ccbq.devq_openings--; 3407 dev->ccbq.dev_openings--; 3408 3409 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) 3410 && (--timeout > 0)) { 3411 DELAY(1000); 3412 (*(sim->sim_poll))(sim); 3413 swi_camnet(); 3414 swi_cambio(); 3415 } 3416 3417 dev->ccbq.devq_openings++; 3418 dev->ccbq.dev_openings++; 3419 3420 if (timeout != 0) { 3421 xpt_action(start_ccb); 3422 while(--timeout > 0) { 3423 (*(sim->sim_poll))(sim); 3424 swi_camnet(); 3425 swi_cambio(); 3426 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3427 != CAM_REQ_INPROG) 3428 break; 3429 DELAY(1000); 3430 } 3431 if (timeout == 0) { 3432 /* 3433 * XXX Is it worth adding a sim_timeout entry 3434 * point so we can attempt recovery? If 3435 * this is only used for dumps, I don't think 3436 * it is. 3437 */ 3438 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3439 } 3440 } else { 3441 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3442 } 3443 splx(s); 3444 } 3445 3446 /* 3447 * Schedule a peripheral driver to receive a ccb when it's 3448 * target device has space for more transactions. 3449 */ 3450 void 3451 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3452 { 3453 struct cam_ed *device; 3454 int s; 3455 int runq; 3456 3457 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3458 device = perph->path->device; 3459 s = splsoftcam(); 3460 if (periph_is_queued(perph)) { 3461 /* Simply reorder based on new priority */ 3462 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3463 (" change priority to %d\n", new_priority)); 3464 if (new_priority < perph->pinfo.priority) { 3465 camq_change_priority(&device->drvq, 3466 perph->pinfo.index, 3467 new_priority); 3468 } 3469 runq = 0; 3470 } else { 3471 /* New entry on the queue */ 3472 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3473 (" added periph to queue\n")); 3474 perph->pinfo.priority = new_priority; 3475 perph->pinfo.generation = ++device->drvq.generation; 3476 camq_insert(&device->drvq, &perph->pinfo); 3477 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3478 } 3479 splx(s); 3480 if (runq != 0) { 3481 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3482 (" calling xpt_run_devq\n")); 3483 xpt_run_dev_allocq(perph->path->bus); 3484 } 3485 } 3486 3487 3488 /* 3489 * Schedule a device to run on a given queue. 3490 * If the device was inserted as a new entry on the queue, 3491 * return 1 meaning the device queue should be run. If we 3492 * were already queued, implying someone else has already 3493 * started the queue, return 0 so the caller doesn't attempt 3494 * to run the queue. Must be run at either splsoftcam 3495 * (or splcam since that encompases splsoftcam). 3496 */ 3497 static int 3498 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3499 u_int32_t new_priority) 3500 { 3501 int retval; 3502 u_int32_t old_priority; 3503 3504 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3505 3506 old_priority = pinfo->priority; 3507 3508 /* 3509 * Are we already queued? 3510 */ 3511 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3512 /* Simply reorder based on new priority */ 3513 if (new_priority < old_priority) { 3514 camq_change_priority(queue, pinfo->index, 3515 new_priority); 3516 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3517 ("changed priority to %d\n", 3518 new_priority)); 3519 } 3520 retval = 0; 3521 } else { 3522 /* New entry on the queue */ 3523 if (new_priority < old_priority) 3524 pinfo->priority = new_priority; 3525 3526 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3527 ("Inserting onto queue\n")); 3528 pinfo->generation = ++queue->generation; 3529 camq_insert(queue, pinfo); 3530 retval = 1; 3531 } 3532 return (retval); 3533 } 3534 3535 static void 3536 xpt_run_dev_allocq(struct cam_eb *bus) 3537 { 3538 struct cam_devq *devq; 3539 int s; 3540 3541 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3542 devq = bus->sim->devq; 3543 3544 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3545 (" qfrozen_cnt == 0x%x, entries == %d, " 3546 "openings == %d, active == %d\n", 3547 devq->alloc_queue.qfrozen_cnt, 3548 devq->alloc_queue.entries, 3549 devq->alloc_openings, 3550 devq->alloc_active)); 3551 3552 s = splsoftcam(); 3553 devq->alloc_queue.qfrozen_cnt++; 3554 while ((devq->alloc_queue.entries > 0) 3555 && (devq->alloc_openings > 0) 3556 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3557 struct cam_ed_qinfo *qinfo; 3558 struct cam_ed *device; 3559 union ccb *work_ccb; 3560 struct cam_periph *drv; 3561 struct camq *drvq; 3562 3563 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3564 CAMQ_HEAD); 3565 device = qinfo->device; 3566 3567 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3568 ("running device %p\n", device)); 3569 3570 drvq = &device->drvq; 3571 3572 #ifdef CAMDEBUG 3573 if (drvq->entries <= 0) { 3574 panic("xpt_run_dev_allocq: " 3575 "Device on queue without any work to do"); 3576 } 3577 #endif 3578 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3579 devq->alloc_openings--; 3580 devq->alloc_active++; 3581 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3582 splx(s); 3583 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3584 drv->pinfo.priority); 3585 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3586 ("calling periph start\n")); 3587 drv->periph_start(drv, work_ccb); 3588 } else { 3589 /* 3590 * Malloc failure in alloc_ccb 3591 */ 3592 /* 3593 * XXX add us to a list to be run from free_ccb 3594 * if we don't have any ccbs active on this 3595 * device queue otherwise we may never get run 3596 * again. 3597 */ 3598 break; 3599 } 3600 3601 /* Raise IPL for possible insertion and test at top of loop */ 3602 s = splsoftcam(); 3603 3604 if (drvq->entries > 0) { 3605 /* We have more work. Attempt to reschedule */ 3606 xpt_schedule_dev_allocq(bus, device); 3607 } 3608 } 3609 devq->alloc_queue.qfrozen_cnt--; 3610 splx(s); 3611 } 3612 3613 static void 3614 xpt_run_dev_sendq(struct cam_eb *bus) 3615 { 3616 struct cam_devq *devq; 3617 int s; 3618 3619 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3620 3621 devq = bus->sim->devq; 3622 3623 s = splcam(); 3624 devq->send_queue.qfrozen_cnt++; 3625 splx(s); 3626 s = splsoftcam(); 3627 while ((devq->send_queue.entries > 0) 3628 && (devq->send_openings > 0)) { 3629 struct cam_ed_qinfo *qinfo; 3630 struct cam_ed *device; 3631 union ccb *work_ccb; 3632 struct cam_sim *sim; 3633 int ospl; 3634 3635 ospl = splcam(); 3636 if (devq->send_queue.qfrozen_cnt > 1) { 3637 splx(ospl); 3638 break; 3639 } 3640 3641 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3642 CAMQ_HEAD); 3643 device = qinfo->device; 3644 3645 /* 3646 * If the device has been "frozen", don't attempt 3647 * to run it. 3648 */ 3649 if (device->qfrozen_cnt > 0) { 3650 splx(ospl); 3651 continue; 3652 } 3653 3654 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3655 ("running device %p\n", device)); 3656 3657 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3658 if (work_ccb == NULL) { 3659 printf("device on run queue with no ccbs???\n"); 3660 splx(ospl); 3661 continue; 3662 } 3663 3664 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3665 3666 if (num_highpower <= 0) { 3667 /* 3668 * We got a high power command, but we 3669 * don't have any available slots. Freeze 3670 * the device queue until we have a slot 3671 * available. 3672 */ 3673 device->qfrozen_cnt++; 3674 STAILQ_INSERT_TAIL(&highpowerq, 3675 &work_ccb->ccb_h, 3676 xpt_links.stqe); 3677 3678 splx(ospl); 3679 continue; 3680 } else { 3681 /* 3682 * Consume a high power slot while 3683 * this ccb runs. 3684 */ 3685 num_highpower--; 3686 } 3687 } 3688 devq->active_dev = device; 3689 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3690 3691 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3692 splx(ospl); 3693 3694 devq->send_openings--; 3695 devq->send_active++; 3696 3697 if (device->ccbq.queue.entries > 0) 3698 xpt_schedule_dev_sendq(bus, device); 3699 3700 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3701 /* 3702 * The client wants to freeze the queue 3703 * after this CCB is sent. 3704 */ 3705 ospl = splcam(); 3706 device->qfrozen_cnt++; 3707 splx(ospl); 3708 } 3709 3710 splx(s); 3711 3712 /* In Target mode, the peripheral driver knows best... */ 3713 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3714 if ((device->inq_flags & SID_CmdQue) != 0 3715 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3716 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3717 else 3718 /* 3719 * Clear this in case of a retried CCB that 3720 * failed due to a rejected tag. 3721 */ 3722 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3723 } 3724 3725 /* 3726 * Device queues can be shared among multiple sim instances 3727 * that reside on different busses. Use the SIM in the queue 3728 * CCB's path, rather than the one in the bus that was passed 3729 * into this function. 3730 */ 3731 sim = work_ccb->ccb_h.path->bus->sim; 3732 (*(sim->sim_action))(sim, work_ccb); 3733 3734 ospl = splcam(); 3735 devq->active_dev = NULL; 3736 splx(ospl); 3737 /* Raise IPL for possible insertion and test at top of loop */ 3738 s = splsoftcam(); 3739 } 3740 splx(s); 3741 s = splcam(); 3742 devq->send_queue.qfrozen_cnt--; 3743 splx(s); 3744 } 3745 3746 /* 3747 * This function merges stuff from the slave ccb into the master ccb, while 3748 * keeping important fields in the master ccb constant. 3749 */ 3750 void 3751 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3752 { 3753 /* 3754 * Pull fields that are valid for peripheral drivers to set 3755 * into the master CCB along with the CCB "payload". 3756 */ 3757 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3758 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3759 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3760 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3761 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3762 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3763 } 3764 3765 void 3766 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3767 { 3768 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3769 ccb_h->pinfo.priority = priority; 3770 ccb_h->path = path; 3771 ccb_h->path_id = path->bus->path_id; 3772 if (path->target) 3773 ccb_h->target_id = path->target->target_id; 3774 else 3775 ccb_h->target_id = CAM_TARGET_WILDCARD; 3776 if (path->device) { 3777 ccb_h->target_lun = path->device->lun_id; 3778 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3779 } else { 3780 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3781 } 3782 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3783 ccb_h->flags = 0; 3784 } 3785 3786 /* Path manipulation functions */ 3787 cam_status 3788 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3789 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3790 { 3791 struct cam_path *path; 3792 cam_status status; 3793 3794 path = (struct cam_path *)malloc(sizeof(*path), M_DEVBUF, M_NOWAIT); 3795 3796 if (path == NULL) { 3797 status = CAM_RESRC_UNAVAIL; 3798 return(status); 3799 } 3800 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3801 if (status != CAM_REQ_CMP) { 3802 free(path, M_DEVBUF); 3803 path = NULL; 3804 } 3805 *new_path_ptr = path; 3806 return (status); 3807 } 3808 3809 static cam_status 3810 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3811 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3812 { 3813 struct cam_eb *bus; 3814 struct cam_et *target; 3815 struct cam_ed *device; 3816 cam_status status; 3817 int s; 3818 3819 status = CAM_REQ_CMP; /* Completed without error */ 3820 target = NULL; /* Wildcarded */ 3821 device = NULL; /* Wildcarded */ 3822 3823 /* 3824 * We will potentially modify the EDT, so block interrupts 3825 * that may attempt to create cam paths. 3826 */ 3827 s = splcam(); 3828 bus = xpt_find_bus(path_id); 3829 if (bus == NULL) { 3830 status = CAM_PATH_INVALID; 3831 } else { 3832 target = xpt_find_target(bus, target_id); 3833 if (target == NULL) { 3834 /* Create one */ 3835 struct cam_et *new_target; 3836 3837 new_target = xpt_alloc_target(bus, target_id); 3838 if (new_target == NULL) { 3839 status = CAM_RESRC_UNAVAIL; 3840 } else { 3841 target = new_target; 3842 } 3843 } 3844 if (target != NULL) { 3845 device = xpt_find_device(target, lun_id); 3846 if (device == NULL) { 3847 /* Create one */ 3848 struct cam_ed *new_device; 3849 3850 new_device = xpt_alloc_device(bus, 3851 target, 3852 lun_id); 3853 if (new_device == NULL) { 3854 status = CAM_RESRC_UNAVAIL; 3855 } else { 3856 device = new_device; 3857 } 3858 } 3859 } 3860 } 3861 splx(s); 3862 3863 /* 3864 * Only touch the user's data if we are successful. 3865 */ 3866 if (status == CAM_REQ_CMP) { 3867 new_path->periph = perph; 3868 new_path->bus = bus; 3869 new_path->target = target; 3870 new_path->device = device; 3871 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3872 } else { 3873 if (device != NULL) 3874 xpt_release_device(bus, target, device); 3875 if (target != NULL) 3876 xpt_release_target(bus, target); 3877 if (bus != NULL) 3878 xpt_release_bus(bus); 3879 } 3880 return (status); 3881 } 3882 3883 static void 3884 xpt_release_path(struct cam_path *path) 3885 { 3886 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3887 if (path->device != NULL) { 3888 xpt_release_device(path->bus, path->target, path->device); 3889 path->device = NULL; 3890 } 3891 if (path->target != NULL) { 3892 xpt_release_target(path->bus, path->target); 3893 path->target = NULL; 3894 } 3895 if (path->bus != NULL) { 3896 xpt_release_bus(path->bus); 3897 path->bus = NULL; 3898 } 3899 } 3900 3901 void 3902 xpt_free_path(struct cam_path *path) 3903 { 3904 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3905 xpt_release_path(path); 3906 free(path, M_DEVBUF); 3907 } 3908 3909 3910 /* 3911 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3912 * in path1, 2 for match with wildcards in path2. 3913 */ 3914 int 3915 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3916 { 3917 int retval = 0; 3918 3919 if (path1->bus != path2->bus) { 3920 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3921 retval = 1; 3922 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3923 retval = 2; 3924 else 3925 return (-1); 3926 } 3927 if (path1->target != path2->target) { 3928 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3929 if (retval == 0) 3930 retval = 1; 3931 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3932 retval = 2; 3933 else 3934 return (-1); 3935 } 3936 if (path1->device != path2->device) { 3937 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3938 if (retval == 0) 3939 retval = 1; 3940 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3941 retval = 2; 3942 else 3943 return (-1); 3944 } 3945 return (retval); 3946 } 3947 3948 void 3949 xpt_print_path(struct cam_path *path) 3950 { 3951 if (path == NULL) 3952 printf("(nopath): "); 3953 else { 3954 if (path->periph != NULL) 3955 printf("(%s%d:", path->periph->periph_name, 3956 path->periph->unit_number); 3957 else 3958 printf("(noperiph:"); 3959 3960 if (path->bus != NULL) 3961 printf("%s%d:%d:", path->bus->sim->sim_name, 3962 path->bus->sim->unit_number, 3963 path->bus->sim->bus_id); 3964 else 3965 printf("nobus:"); 3966 3967 if (path->target != NULL) 3968 printf("%d:", path->target->target_id); 3969 else 3970 printf("X:"); 3971 3972 if (path->device != NULL) 3973 printf("%d): ", path->device->lun_id); 3974 else 3975 printf("X): "); 3976 } 3977 } 3978 3979 path_id_t 3980 xpt_path_path_id(struct cam_path *path) 3981 { 3982 return(path->bus->path_id); 3983 } 3984 3985 target_id_t 3986 xpt_path_target_id(struct cam_path *path) 3987 { 3988 if (path->target != NULL) 3989 return (path->target->target_id); 3990 else 3991 return (CAM_TARGET_WILDCARD); 3992 } 3993 3994 lun_id_t 3995 xpt_path_lun_id(struct cam_path *path) 3996 { 3997 if (path->device != NULL) 3998 return (path->device->lun_id); 3999 else 4000 return (CAM_LUN_WILDCARD); 4001 } 4002 4003 struct cam_sim * 4004 xpt_path_sim(struct cam_path *path) 4005 { 4006 return (path->bus->sim); 4007 } 4008 4009 struct cam_periph* 4010 xpt_path_periph(struct cam_path *path) 4011 { 4012 return (path->periph); 4013 } 4014 4015 /* 4016 * Release a CAM control block for the caller. Remit the cost of the structure 4017 * to the device referenced by the path. If the this device had no 'credits' 4018 * and peripheral drivers have registered async callbacks for this notification 4019 * call them now. 4020 */ 4021 void 4022 xpt_release_ccb(union ccb *free_ccb) 4023 { 4024 int s; 4025 struct cam_path *path; 4026 struct cam_ed *device; 4027 struct cam_eb *bus; 4028 4029 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4030 path = free_ccb->ccb_h.path; 4031 device = path->device; 4032 bus = path->bus; 4033 s = splsoftcam(); 4034 cam_ccbq_release_opening(&device->ccbq); 4035 if (xpt_ccb_count > xpt_max_ccbs) { 4036 xpt_free_ccb(free_ccb); 4037 xpt_ccb_count--; 4038 } else { 4039 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 4040 } 4041 bus->sim->devq->alloc_openings++; 4042 bus->sim->devq->alloc_active--; 4043 /* XXX Turn this into an inline function - xpt_run_device?? */ 4044 if ((device_is_alloc_queued(device) == 0) 4045 && (device->drvq.entries > 0)) { 4046 xpt_schedule_dev_allocq(bus, device); 4047 } 4048 splx(s); 4049 if (dev_allocq_is_runnable(bus->sim->devq)) 4050 xpt_run_dev_allocq(bus); 4051 } 4052 4053 /* Functions accessed by SIM drivers */ 4054 4055 /* 4056 * A sim structure, listing the SIM entry points and instance 4057 * identification info is passed to xpt_bus_register to hook the SIM 4058 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4059 * for this new bus and places it in the array of busses and assigns 4060 * it a path_id. The path_id may be influenced by "hard wiring" 4061 * information specified by the user. Once interrupt services are 4062 * availible, the bus will be probed. 4063 */ 4064 int32_t 4065 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4066 { 4067 struct cam_eb *new_bus; 4068 struct cam_eb *old_bus; 4069 struct ccb_pathinq cpi; 4070 int s; 4071 4072 sim->bus_id = bus; 4073 new_bus = (struct cam_eb *)malloc(sizeof(*new_bus), 4074 M_DEVBUF, M_NOWAIT); 4075 if (new_bus == NULL) { 4076 /* Couldn't satisfy request */ 4077 return (CAM_RESRC_UNAVAIL); 4078 } 4079 4080 if (strcmp(sim->sim_name, "xpt") != 0) { 4081 4082 sim->path_id = 4083 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4084 } 4085 4086 TAILQ_INIT(&new_bus->et_entries); 4087 new_bus->path_id = sim->path_id; 4088 new_bus->sim = sim; 4089 timevalclear(&new_bus->last_reset); 4090 new_bus->flags = 0; 4091 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4092 new_bus->generation = 0; 4093 s = splcam(); 4094 old_bus = TAILQ_FIRST(&xpt_busses); 4095 while (old_bus != NULL 4096 && old_bus->path_id < new_bus->path_id) 4097 old_bus = TAILQ_NEXT(old_bus, links); 4098 if (old_bus != NULL) 4099 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4100 else 4101 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 4102 bus_generation++; 4103 splx(s); 4104 4105 /* Notify interested parties */ 4106 if (sim->path_id != CAM_XPT_PATH_ID) { 4107 struct cam_path path; 4108 4109 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4110 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4111 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4112 cpi.ccb_h.func_code = XPT_PATH_INQ; 4113 xpt_action((union ccb *)&cpi); 4114 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi); 4115 xpt_release_path(&path); 4116 } 4117 return (CAM_SUCCESS); 4118 } 4119 4120 int32_t 4121 xpt_bus_deregister(path_id_t pathid) 4122 { 4123 struct cam_path bus_path; 4124 cam_status status; 4125 4126 status = xpt_compile_path(&bus_path, NULL, pathid, 4127 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4128 if (status != CAM_REQ_CMP) 4129 return (status); 4130 4131 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4132 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4133 4134 /* Release the reference count held while registered. */ 4135 xpt_release_bus(bus_path.bus); 4136 xpt_release_path(&bus_path); 4137 4138 return (CAM_REQ_CMP); 4139 } 4140 4141 static path_id_t 4142 xptnextfreepathid(void) 4143 { 4144 struct cam_eb *bus; 4145 path_id_t pathid; 4146 char *strval; 4147 4148 pathid = 0; 4149 bus = TAILQ_FIRST(&xpt_busses); 4150 retry: 4151 /* Find an unoccupied pathid */ 4152 while (bus != NULL 4153 && bus->path_id <= pathid) { 4154 if (bus->path_id == pathid) 4155 pathid++; 4156 bus = TAILQ_NEXT(bus, links); 4157 } 4158 4159 /* 4160 * Ensure that this pathid is not reserved for 4161 * a bus that may be registered in the future. 4162 */ 4163 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4164 ++pathid; 4165 /* Start the search over */ 4166 goto retry; 4167 } 4168 return (pathid); 4169 } 4170 4171 static path_id_t 4172 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4173 { 4174 path_id_t pathid; 4175 int i, dunit, val; 4176 char buf[32], *strval; 4177 4178 pathid = CAM_XPT_PATH_ID; 4179 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4180 i = -1; 4181 while ((i = resource_locate(i, "scbus")) != -1) { 4182 dunit = resource_query_unit(i); 4183 if (dunit < 0) /* unwired?! */ 4184 continue; 4185 if (resource_string_value("scbus", dunit, "at", &strval) != 0) 4186 continue; 4187 if (strcmp(buf, strval) != 0) 4188 continue; 4189 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4190 if (sim_bus == val) { 4191 pathid = dunit; 4192 break; 4193 } 4194 } else if (sim_bus == 0) { 4195 /* Unspecified matches bus 0 */ 4196 pathid = dunit; 4197 break; 4198 } else { 4199 printf("Ambiguous scbus configuration for %s%d " 4200 "bus %d, cannot wire down. The kernel " 4201 "config entry for scbus%d should " 4202 "specify a controller bus.\n" 4203 "Scbus will be assigned dynamically.\n", 4204 sim_name, sim_unit, sim_bus, dunit); 4205 break; 4206 } 4207 } 4208 4209 if (pathid == CAM_XPT_PATH_ID) 4210 pathid = xptnextfreepathid(); 4211 return (pathid); 4212 } 4213 4214 void 4215 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4216 { 4217 struct cam_eb *bus; 4218 struct cam_et *target, *next_target; 4219 struct cam_ed *device, *next_device; 4220 int s; 4221 4222 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4223 4224 /* 4225 * Most async events come from a CAM interrupt context. In 4226 * a few cases, the error recovery code at the peripheral layer, 4227 * which may run from our SWI or a process context, may signal 4228 * deferred events with a call to xpt_async. Ensure async 4229 * notifications are serialized by blocking cam interrupts. 4230 */ 4231 s = splcam(); 4232 4233 bus = path->bus; 4234 4235 if (async_code == AC_BUS_RESET) { 4236 int s; 4237 4238 s = splclock(); 4239 /* Update our notion of when the last reset occurred */ 4240 microtime(&bus->last_reset); 4241 splx(s); 4242 } 4243 4244 for (target = TAILQ_FIRST(&bus->et_entries); 4245 target != NULL; 4246 target = next_target) { 4247 4248 next_target = TAILQ_NEXT(target, links); 4249 4250 if (path->target != target 4251 && path->target->target_id != CAM_TARGET_WILDCARD 4252 && target->target_id != CAM_TARGET_WILDCARD) 4253 continue; 4254 4255 if (async_code == AC_SENT_BDR) { 4256 int s; 4257 4258 /* Update our notion of when the last reset occurred */ 4259 s = splclock(); 4260 microtime(&path->target->last_reset); 4261 splx(s); 4262 } 4263 4264 for (device = TAILQ_FIRST(&target->ed_entries); 4265 device != NULL; 4266 device = next_device) { 4267 4268 next_device = TAILQ_NEXT(device, links); 4269 4270 if (path->device != device 4271 && path->device->lun_id != CAM_LUN_WILDCARD 4272 && device->lun_id != CAM_LUN_WILDCARD) 4273 continue; 4274 4275 xpt_dev_async(async_code, bus, target, 4276 device, async_arg); 4277 4278 xpt_async_bcast(&device->asyncs, async_code, 4279 path, async_arg); 4280 } 4281 } 4282 4283 /* 4284 * If this wasn't a fully wildcarded async, tell all 4285 * clients that want all async events. 4286 */ 4287 if (bus != xpt_periph->path->bus) 4288 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4289 path, async_arg); 4290 splx(s); 4291 } 4292 4293 static void 4294 xpt_async_bcast(struct async_list *async_head, 4295 u_int32_t async_code, 4296 struct cam_path *path, void *async_arg) 4297 { 4298 struct async_node *cur_entry; 4299 4300 cur_entry = SLIST_FIRST(async_head); 4301 while (cur_entry != NULL) { 4302 struct async_node *next_entry; 4303 /* 4304 * Grab the next list entry before we call the current 4305 * entry's callback. This is because the callback function 4306 * can delete its async callback entry. 4307 */ 4308 next_entry = SLIST_NEXT(cur_entry, links); 4309 if ((cur_entry->event_enable & async_code) != 0) 4310 cur_entry->callback(cur_entry->callback_arg, 4311 async_code, path, 4312 async_arg); 4313 cur_entry = next_entry; 4314 } 4315 } 4316 4317 /* 4318 * Handle any per-device event notifications that require action by the XPT. 4319 */ 4320 static void 4321 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4322 struct cam_ed *device, void *async_arg) 4323 { 4324 cam_status status; 4325 struct cam_path newpath; 4326 4327 /* 4328 * We only need to handle events for real devices. 4329 */ 4330 if (target->target_id == CAM_TARGET_WILDCARD 4331 || device->lun_id == CAM_LUN_WILDCARD) 4332 return; 4333 4334 /* 4335 * We need our own path with wildcards expanded to 4336 * handle certain types of events. 4337 */ 4338 if ((async_code == AC_SENT_BDR) 4339 || (async_code == AC_BUS_RESET) 4340 || (async_code == AC_INQ_CHANGED)) 4341 status = xpt_compile_path(&newpath, NULL, 4342 bus->path_id, 4343 target->target_id, 4344 device->lun_id); 4345 else 4346 status = CAM_REQ_CMP_ERR; 4347 4348 if (status == CAM_REQ_CMP) { 4349 4350 /* 4351 * Allow transfer negotiation to occur in a 4352 * tag free environment. 4353 */ 4354 if (async_code == AC_SENT_BDR 4355 || async_code == AC_BUS_RESET) 4356 xpt_toggle_tags(&newpath); 4357 4358 if (async_code == AC_INQ_CHANGED) { 4359 /* 4360 * We've sent a start unit command, or 4361 * something similar to a device that 4362 * may have caused its inquiry data to 4363 * change. So we re-scan the device to 4364 * refresh the inquiry data for it. 4365 */ 4366 xpt_scan_lun(newpath.periph, &newpath, 4367 CAM_EXPECT_INQ_CHANGE, NULL); 4368 } 4369 xpt_release_path(&newpath); 4370 } else if (async_code == AC_LOST_DEVICE) { 4371 device->flags |= CAM_DEV_UNCONFIGURED; 4372 } else if (async_code == AC_TRANSFER_NEG) { 4373 struct ccb_trans_settings *settings; 4374 4375 settings = (struct ccb_trans_settings *)async_arg; 4376 xpt_set_transfer_settings(settings, device, 4377 /*async_update*/TRUE); 4378 } 4379 } 4380 4381 u_int32_t 4382 xpt_freeze_devq(struct cam_path *path, u_int count) 4383 { 4384 int s; 4385 struct ccb_hdr *ccbh; 4386 4387 s = splcam(); 4388 path->device->qfrozen_cnt += count; 4389 4390 /* 4391 * Mark the last CCB in the queue as needing 4392 * to be requeued if the driver hasn't 4393 * changed it's state yet. This fixes a race 4394 * where a ccb is just about to be queued to 4395 * a controller driver when it's interrupt routine 4396 * freezes the queue. To completly close the 4397 * hole, controller drives must check to see 4398 * if a ccb's status is still CAM_REQ_INPROG 4399 * under spl protection just before they queue 4400 * the CCB. See ahc_action/ahc_freeze_devq for 4401 * an example. 4402 */ 4403 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4404 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4405 ccbh->status = CAM_REQUEUE_REQ; 4406 splx(s); 4407 return (path->device->qfrozen_cnt); 4408 } 4409 4410 u_int32_t 4411 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4412 { 4413 sim->devq->send_queue.qfrozen_cnt += count; 4414 if (sim->devq->active_dev != NULL) { 4415 struct ccb_hdr *ccbh; 4416 4417 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4418 ccb_hdr_tailq); 4419 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4420 ccbh->status = CAM_REQUEUE_REQ; 4421 } 4422 return (sim->devq->send_queue.qfrozen_cnt); 4423 } 4424 4425 static void 4426 xpt_release_devq_timeout(void *arg) 4427 { 4428 struct cam_ed *device; 4429 4430 device = (struct cam_ed *)arg; 4431 4432 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4433 } 4434 4435 void 4436 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4437 { 4438 xpt_release_devq_device(path->device, count, run_queue); 4439 } 4440 4441 static void 4442 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4443 { 4444 int rundevq; 4445 int s0, s1; 4446 4447 rundevq = 0; 4448 s0 = splsoftcam(); 4449 s1 = splcam(); 4450 if (dev->qfrozen_cnt > 0) { 4451 4452 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4453 dev->qfrozen_cnt -= count; 4454 if (dev->qfrozen_cnt == 0) { 4455 4456 /* 4457 * No longer need to wait for a successful 4458 * command completion. 4459 */ 4460 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4461 4462 /* 4463 * Remove any timeouts that might be scheduled 4464 * to release this queue. 4465 */ 4466 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4467 untimeout(xpt_release_devq_timeout, dev, 4468 dev->c_handle); 4469 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4470 } 4471 4472 /* 4473 * Now that we are unfrozen schedule the 4474 * device so any pending transactions are 4475 * run. 4476 */ 4477 if ((dev->ccbq.queue.entries > 0) 4478 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4479 && (run_queue != 0)) { 4480 rundevq = 1; 4481 } 4482 } 4483 } 4484 splx(s1); 4485 if (rundevq != 0) 4486 xpt_run_dev_sendq(dev->target->bus); 4487 splx(s0); 4488 } 4489 4490 void 4491 xpt_release_simq(struct cam_sim *sim, int run_queue) 4492 { 4493 int s; 4494 struct camq *sendq; 4495 4496 sendq = &(sim->devq->send_queue); 4497 s = splcam(); 4498 if (sendq->qfrozen_cnt > 0) { 4499 4500 sendq->qfrozen_cnt--; 4501 if (sendq->qfrozen_cnt == 0) { 4502 struct cam_eb *bus; 4503 4504 /* 4505 * If there is a timeout scheduled to release this 4506 * sim queue, remove it. The queue frozen count is 4507 * already at 0. 4508 */ 4509 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4510 untimeout(xpt_release_simq_timeout, sim, 4511 sim->c_handle); 4512 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4513 } 4514 bus = xpt_find_bus(sim->path_id); 4515 splx(s); 4516 4517 if (run_queue) { 4518 /* 4519 * Now that we are unfrozen run the send queue. 4520 */ 4521 xpt_run_dev_sendq(bus); 4522 } 4523 xpt_release_bus(bus); 4524 } else 4525 splx(s); 4526 } else 4527 splx(s); 4528 } 4529 4530 static void 4531 xpt_release_simq_timeout(void *arg) 4532 { 4533 struct cam_sim *sim; 4534 4535 sim = (struct cam_sim *)arg; 4536 xpt_release_simq(sim, /* run_queue */ TRUE); 4537 } 4538 4539 void 4540 xpt_done(union ccb *done_ccb) 4541 { 4542 int s; 4543 4544 s = splcam(); 4545 4546 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4547 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4548 /* 4549 * Queue up the request for handling by our SWI handler 4550 * any of the "non-immediate" type of ccbs. 4551 */ 4552 switch (done_ccb->ccb_h.path->periph->type) { 4553 case CAM_PERIPH_BIO: 4554 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4555 sim_links.tqe); 4556 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4557 setsoftcambio(); 4558 break; 4559 case CAM_PERIPH_NET: 4560 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4561 sim_links.tqe); 4562 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4563 setsoftcamnet(); 4564 break; 4565 } 4566 } 4567 splx(s); 4568 } 4569 4570 union ccb * 4571 xpt_alloc_ccb() 4572 { 4573 union ccb *new_ccb; 4574 4575 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_WAITOK); 4576 return (new_ccb); 4577 } 4578 4579 void 4580 xpt_free_ccb(union ccb *free_ccb) 4581 { 4582 free(free_ccb, M_DEVBUF); 4583 } 4584 4585 4586 4587 /* Private XPT functions */ 4588 4589 /* 4590 * Get a CAM control block for the caller. Charge the structure to the device 4591 * referenced by the path. If the this device has no 'credits' then the 4592 * device already has the maximum number of outstanding operations under way 4593 * and we return NULL. If we don't have sufficient resources to allocate more 4594 * ccbs, we also return NULL. 4595 */ 4596 static union ccb * 4597 xpt_get_ccb(struct cam_ed *device) 4598 { 4599 union ccb *new_ccb; 4600 int s; 4601 4602 s = splsoftcam(); 4603 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) { 4604 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_NOWAIT); 4605 if (new_ccb == NULL) { 4606 splx(s); 4607 return (NULL); 4608 } 4609 callout_handle_init(&new_ccb->ccb_h.timeout_ch); 4610 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4611 xpt_links.sle); 4612 xpt_ccb_count++; 4613 } 4614 cam_ccbq_take_opening(&device->ccbq); 4615 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4616 splx(s); 4617 return (new_ccb); 4618 } 4619 4620 static void 4621 xpt_release_bus(struct cam_eb *bus) 4622 { 4623 int s; 4624 4625 s = splcam(); 4626 if ((--bus->refcount == 0) 4627 && (TAILQ_FIRST(&bus->et_entries) == NULL)) { 4628 TAILQ_REMOVE(&xpt_busses, bus, links); 4629 bus_generation++; 4630 splx(s); 4631 free(bus, M_DEVBUF); 4632 } else 4633 splx(s); 4634 } 4635 4636 static struct cam_et * 4637 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4638 { 4639 struct cam_et *target; 4640 4641 target = (struct cam_et *)malloc(sizeof(*target), M_DEVBUF, M_NOWAIT); 4642 if (target != NULL) { 4643 struct cam_et *cur_target; 4644 4645 TAILQ_INIT(&target->ed_entries); 4646 target->bus = bus; 4647 target->target_id = target_id; 4648 target->refcount = 1; 4649 target->generation = 0; 4650 timevalclear(&target->last_reset); 4651 /* 4652 * Hold a reference to our parent bus so it 4653 * will not go away before we do. 4654 */ 4655 bus->refcount++; 4656 4657 /* Insertion sort into our bus's target list */ 4658 cur_target = TAILQ_FIRST(&bus->et_entries); 4659 while (cur_target != NULL && cur_target->target_id < target_id) 4660 cur_target = TAILQ_NEXT(cur_target, links); 4661 4662 if (cur_target != NULL) { 4663 TAILQ_INSERT_BEFORE(cur_target, target, links); 4664 } else { 4665 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4666 } 4667 bus->generation++; 4668 } 4669 return (target); 4670 } 4671 4672 static void 4673 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4674 { 4675 int s; 4676 4677 s = splcam(); 4678 if ((--target->refcount == 0) 4679 && (TAILQ_FIRST(&target->ed_entries) == NULL)) { 4680 TAILQ_REMOVE(&bus->et_entries, target, links); 4681 bus->generation++; 4682 splx(s); 4683 free(target, M_DEVBUF); 4684 xpt_release_bus(bus); 4685 } else 4686 splx(s); 4687 } 4688 4689 static struct cam_ed * 4690 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4691 { 4692 struct cam_ed *device; 4693 struct cam_devq *devq; 4694 cam_status status; 4695 4696 /* Make space for us in the device queue on our bus */ 4697 devq = bus->sim->devq; 4698 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4699 4700 if (status != CAM_REQ_CMP) { 4701 device = NULL; 4702 } else { 4703 device = (struct cam_ed *)malloc(sizeof(*device), 4704 M_DEVBUF, M_NOWAIT); 4705 } 4706 4707 if (device != NULL) { 4708 struct cam_ed *cur_device; 4709 4710 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4711 device->alloc_ccb_entry.device = device; 4712 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4713 device->send_ccb_entry.device = device; 4714 device->target = target; 4715 device->lun_id = lun_id; 4716 /* Initialize our queues */ 4717 if (camq_init(&device->drvq, 0) != 0) { 4718 free(device, M_DEVBUF); 4719 return (NULL); 4720 } 4721 if (cam_ccbq_init(&device->ccbq, 4722 bus->sim->max_dev_openings) != 0) { 4723 camq_fini(&device->drvq); 4724 free(device, M_DEVBUF); 4725 return (NULL); 4726 } 4727 SLIST_INIT(&device->asyncs); 4728 SLIST_INIT(&device->periphs); 4729 device->generation = 0; 4730 device->owner = NULL; 4731 /* 4732 * Take the default quirk entry until we have inquiry 4733 * data and can determine a better quirk to use. 4734 */ 4735 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4736 bzero(&device->inq_data, sizeof(device->inq_data)); 4737 device->inq_flags = 0; 4738 device->queue_flags = 0; 4739 device->serial_num = NULL; 4740 device->serial_num_len = 0; 4741 device->qfrozen_cnt = 0; 4742 device->flags = CAM_DEV_UNCONFIGURED; 4743 device->tag_delay_count = 0; 4744 device->refcount = 1; 4745 callout_handle_init(&device->c_handle); 4746 4747 /* 4748 * Hold a reference to our parent target so it 4749 * will not go away before we do. 4750 */ 4751 target->refcount++; 4752 4753 /* 4754 * XXX should be limited by number of CCBs this bus can 4755 * do. 4756 */ 4757 xpt_max_ccbs += device->ccbq.devq_openings; 4758 /* Insertion sort into our target's device list */ 4759 cur_device = TAILQ_FIRST(&target->ed_entries); 4760 while (cur_device != NULL && cur_device->lun_id < lun_id) 4761 cur_device = TAILQ_NEXT(cur_device, links); 4762 if (cur_device != NULL) { 4763 TAILQ_INSERT_BEFORE(cur_device, device, links); 4764 } else { 4765 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4766 } 4767 target->generation++; 4768 } 4769 return (device); 4770 } 4771 4772 static void 4773 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4774 struct cam_ed *device) 4775 { 4776 int s; 4777 4778 s = splcam(); 4779 if ((--device->refcount == 0) 4780 && ((device->flags & CAM_DEV_UNCONFIGURED) != 0)) { 4781 struct cam_devq *devq; 4782 4783 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4784 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4785 panic("Removing device while still queued for ccbs"); 4786 4787 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) 4788 untimeout(xpt_release_devq_timeout, device, 4789 device->c_handle); 4790 4791 TAILQ_REMOVE(&target->ed_entries, device,links); 4792 target->generation++; 4793 xpt_max_ccbs -= device->ccbq.devq_openings; 4794 /* Release our slot in the devq */ 4795 devq = bus->sim->devq; 4796 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4797 splx(s); 4798 free(device, M_DEVBUF); 4799 xpt_release_target(bus, target); 4800 } else 4801 splx(s); 4802 } 4803 4804 static u_int32_t 4805 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4806 { 4807 int s; 4808 int diff; 4809 int result; 4810 struct cam_ed *dev; 4811 4812 dev = path->device; 4813 s = splsoftcam(); 4814 4815 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4816 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4817 if (result == CAM_REQ_CMP && (diff < 0)) { 4818 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4819 } 4820 /* Adjust the global limit */ 4821 xpt_max_ccbs += diff; 4822 splx(s); 4823 return (result); 4824 } 4825 4826 static struct cam_eb * 4827 xpt_find_bus(path_id_t path_id) 4828 { 4829 struct cam_eb *bus; 4830 4831 for (bus = TAILQ_FIRST(&xpt_busses); 4832 bus != NULL; 4833 bus = TAILQ_NEXT(bus, links)) { 4834 if (bus->path_id == path_id) { 4835 bus->refcount++; 4836 break; 4837 } 4838 } 4839 return (bus); 4840 } 4841 4842 static struct cam_et * 4843 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4844 { 4845 struct cam_et *target; 4846 4847 for (target = TAILQ_FIRST(&bus->et_entries); 4848 target != NULL; 4849 target = TAILQ_NEXT(target, links)) { 4850 if (target->target_id == target_id) { 4851 target->refcount++; 4852 break; 4853 } 4854 } 4855 return (target); 4856 } 4857 4858 static struct cam_ed * 4859 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4860 { 4861 struct cam_ed *device; 4862 4863 for (device = TAILQ_FIRST(&target->ed_entries); 4864 device != NULL; 4865 device = TAILQ_NEXT(device, links)) { 4866 if (device->lun_id == lun_id) { 4867 device->refcount++; 4868 break; 4869 } 4870 } 4871 return (device); 4872 } 4873 4874 typedef struct { 4875 union ccb *request_ccb; 4876 struct ccb_pathinq *cpi; 4877 int pending_count; 4878 } xpt_scan_bus_info; 4879 4880 /* 4881 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4882 * As the scan progresses, xpt_scan_bus is used as the 4883 * callback on completion function. 4884 */ 4885 static void 4886 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 4887 { 4888 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4889 ("xpt_scan_bus\n")); 4890 switch (request_ccb->ccb_h.func_code) { 4891 case XPT_SCAN_BUS: 4892 { 4893 xpt_scan_bus_info *scan_info; 4894 union ccb *work_ccb; 4895 struct cam_path *path; 4896 u_int i; 4897 u_int max_target; 4898 u_int initiator_id; 4899 4900 /* Find out the characteristics of the bus */ 4901 work_ccb = xpt_alloc_ccb(); 4902 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 4903 request_ccb->ccb_h.pinfo.priority); 4904 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4905 xpt_action(work_ccb); 4906 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4907 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 4908 xpt_free_ccb(work_ccb); 4909 xpt_done(request_ccb); 4910 return; 4911 } 4912 4913 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4914 /* 4915 * Can't scan the bus on an adapter that 4916 * cannot perform the initiator role. 4917 */ 4918 request_ccb->ccb_h.status = CAM_REQ_CMP; 4919 xpt_free_ccb(work_ccb); 4920 xpt_done(request_ccb); 4921 return; 4922 } 4923 4924 /* Save some state for use while we probe for devices */ 4925 scan_info = (xpt_scan_bus_info *) 4926 malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_WAITOK); 4927 scan_info->request_ccb = request_ccb; 4928 scan_info->cpi = &work_ccb->cpi; 4929 4930 /* Cache on our stack so we can work asynchronously */ 4931 max_target = scan_info->cpi->max_target; 4932 initiator_id = scan_info->cpi->initiator_id; 4933 4934 /* 4935 * Don't count the initiator if the 4936 * initiator is addressable. 4937 */ 4938 scan_info->pending_count = max_target + 1; 4939 if (initiator_id <= max_target) 4940 scan_info->pending_count--; 4941 4942 for (i = 0; i <= max_target; i++) { 4943 cam_status status; 4944 if (i == initiator_id) 4945 continue; 4946 4947 status = xpt_create_path(&path, xpt_periph, 4948 request_ccb->ccb_h.path_id, 4949 i, 0); 4950 if (status != CAM_REQ_CMP) { 4951 printf("xpt_scan_bus: xpt_create_path failed" 4952 " with status %#x, bus scan halted\n", 4953 status); 4954 break; 4955 } 4956 work_ccb = xpt_alloc_ccb(); 4957 xpt_setup_ccb(&work_ccb->ccb_h, path, 4958 request_ccb->ccb_h.pinfo.priority); 4959 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4960 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4961 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 4962 work_ccb->crcn.flags = request_ccb->crcn.flags; 4963 #if 0 4964 printf("xpt_scan_bus: probing %d:%d:%d\n", 4965 request_ccb->ccb_h.path_id, i, 0); 4966 #endif 4967 xpt_action(work_ccb); 4968 } 4969 break; 4970 } 4971 case XPT_SCAN_LUN: 4972 { 4973 xpt_scan_bus_info *scan_info; 4974 path_id_t path_id; 4975 target_id_t target_id; 4976 lun_id_t lun_id; 4977 4978 /* Reuse the same CCB to query if a device was really found */ 4979 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 4980 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 4981 request_ccb->ccb_h.pinfo.priority); 4982 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 4983 4984 path_id = request_ccb->ccb_h.path_id; 4985 target_id = request_ccb->ccb_h.target_id; 4986 lun_id = request_ccb->ccb_h.target_lun; 4987 xpt_action(request_ccb); 4988 4989 #if 0 4990 printf("xpt_scan_bus: got back probe from %d:%d:%d\n", 4991 path_id, target_id, lun_id); 4992 #endif 4993 4994 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 4995 struct cam_ed *device; 4996 struct cam_et *target; 4997 int s, phl; 4998 4999 /* 5000 * If we already probed lun 0 successfully, or 5001 * we have additional configured luns on this 5002 * target that might have "gone away", go onto 5003 * the next lun. 5004 */ 5005 target = request_ccb->ccb_h.path->target; 5006 /* 5007 * We may touch devices that we don't 5008 * hold references too, so ensure they 5009 * don't disappear out from under us. 5010 * The target above is referenced by the 5011 * path in the request ccb. 5012 */ 5013 phl = 0; 5014 s = splcam(); 5015 device = TAILQ_FIRST(&target->ed_entries); 5016 if (device != NULL) { 5017 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 5018 if (device->lun_id == 0) 5019 device = TAILQ_NEXT(device, links); 5020 } 5021 splx(s); 5022 if ((lun_id != 0) || (device != NULL)) { 5023 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5024 lun_id++; 5025 } 5026 } else { 5027 struct cam_ed *device; 5028 5029 device = request_ccb->ccb_h.path->device; 5030 5031 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5032 /* Try the next lun */ 5033 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 5034 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 5035 lun_id++; 5036 } 5037 } 5038 5039 xpt_free_path(request_ccb->ccb_h.path); 5040 5041 /* Check Bounds */ 5042 if ((lun_id == request_ccb->ccb_h.target_lun) 5043 || lun_id > scan_info->cpi->max_lun) { 5044 /* We're done */ 5045 5046 xpt_free_ccb(request_ccb); 5047 scan_info->pending_count--; 5048 if (scan_info->pending_count == 0) { 5049 xpt_free_ccb((union ccb *)scan_info->cpi); 5050 request_ccb = scan_info->request_ccb; 5051 free(scan_info, M_TEMP); 5052 request_ccb->ccb_h.status = CAM_REQ_CMP; 5053 xpt_done(request_ccb); 5054 } 5055 } else { 5056 /* Try the next device */ 5057 struct cam_path *path; 5058 cam_status status; 5059 5060 path = request_ccb->ccb_h.path; 5061 status = xpt_create_path(&path, xpt_periph, 5062 path_id, target_id, lun_id); 5063 if (status != CAM_REQ_CMP) { 5064 printf("xpt_scan_bus: xpt_create_path failed " 5065 "with status %#x, halting LUN scan\n", 5066 status); 5067 xpt_free_ccb(request_ccb); 5068 scan_info->pending_count--; 5069 if (scan_info->pending_count == 0) { 5070 xpt_free_ccb( 5071 (union ccb *)scan_info->cpi); 5072 request_ccb = scan_info->request_ccb; 5073 free(scan_info, M_TEMP); 5074 request_ccb->ccb_h.status = CAM_REQ_CMP; 5075 xpt_done(request_ccb); 5076 break; 5077 } 5078 } 5079 xpt_setup_ccb(&request_ccb->ccb_h, path, 5080 request_ccb->ccb_h.pinfo.priority); 5081 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5082 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5083 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5084 request_ccb->crcn.flags = 5085 scan_info->request_ccb->crcn.flags; 5086 #if 0 5087 xpt_print_path(path); 5088 printf("xpt_scan bus probing\n"); 5089 #endif 5090 xpt_action(request_ccb); 5091 } 5092 break; 5093 } 5094 default: 5095 break; 5096 } 5097 } 5098 5099 typedef enum { 5100 PROBE_TUR, 5101 PROBE_INQUIRY, 5102 PROBE_FULL_INQUIRY, 5103 PROBE_MODE_SENSE, 5104 PROBE_SERIAL_NUM, 5105 PROBE_TUR_FOR_NEGOTIATION 5106 } probe_action; 5107 5108 typedef enum { 5109 PROBE_INQUIRY_CKSUM = 0x01, 5110 PROBE_SERIAL_CKSUM = 0x02, 5111 PROBE_NO_ANNOUNCE = 0x04 5112 } probe_flags; 5113 5114 typedef struct { 5115 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5116 probe_action action; 5117 union ccb saved_ccb; 5118 probe_flags flags; 5119 MD5_CTX context; 5120 u_int8_t digest[16]; 5121 } probe_softc; 5122 5123 static void 5124 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5125 cam_flags flags, union ccb *request_ccb) 5126 { 5127 struct ccb_pathinq cpi; 5128 cam_status status; 5129 struct cam_path *new_path; 5130 struct cam_periph *old_periph; 5131 int s; 5132 5133 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5134 ("xpt_scan_lun\n")); 5135 5136 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5137 cpi.ccb_h.func_code = XPT_PATH_INQ; 5138 xpt_action((union ccb *)&cpi); 5139 5140 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5141 if (request_ccb != NULL) { 5142 request_ccb->ccb_h.status = cpi.ccb_h.status; 5143 xpt_done(request_ccb); 5144 } 5145 return; 5146 } 5147 5148 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5149 /* 5150 * Can't scan the bus on an adapter that 5151 * cannot perform the initiator role. 5152 */ 5153 if (request_ccb != NULL) { 5154 request_ccb->ccb_h.status = CAM_REQ_CMP; 5155 xpt_done(request_ccb); 5156 } 5157 return; 5158 } 5159 5160 if (request_ccb == NULL) { 5161 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_NOWAIT); 5162 if (request_ccb == NULL) { 5163 xpt_print_path(path); 5164 printf("xpt_scan_lun: can't allocate CCB, can't " 5165 "continue\n"); 5166 return; 5167 } 5168 new_path = malloc(sizeof(*new_path), M_TEMP, M_NOWAIT); 5169 if (new_path == NULL) { 5170 xpt_print_path(path); 5171 printf("xpt_scan_lun: can't allocate path, can't " 5172 "continue\n"); 5173 free(request_ccb, M_TEMP); 5174 return; 5175 } 5176 status = xpt_compile_path(new_path, xpt_periph, 5177 path->bus->path_id, 5178 path->target->target_id, 5179 path->device->lun_id); 5180 5181 if (status != CAM_REQ_CMP) { 5182 xpt_print_path(path); 5183 printf("xpt_scan_lun: can't compile path, can't " 5184 "continue\n"); 5185 free(request_ccb, M_TEMP); 5186 free(new_path, M_TEMP); 5187 return; 5188 } 5189 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5190 request_ccb->ccb_h.cbfcnp = xptscandone; 5191 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5192 request_ccb->crcn.flags = flags; 5193 } 5194 5195 s = splsoftcam(); 5196 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5197 probe_softc *softc; 5198 5199 softc = (probe_softc *)old_periph->softc; 5200 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5201 periph_links.tqe); 5202 } else { 5203 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5204 probestart, "probe", 5205 CAM_PERIPH_BIO, 5206 request_ccb->ccb_h.path, NULL, 0, 5207 request_ccb); 5208 5209 if (status != CAM_REQ_CMP) { 5210 xpt_print_path(path); 5211 printf("xpt_scan_lun: cam_alloc_periph returned an " 5212 "error, can't continue probe\n"); 5213 request_ccb->ccb_h.status = status; 5214 xpt_done(request_ccb); 5215 } 5216 } 5217 splx(s); 5218 } 5219 5220 static void 5221 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5222 { 5223 xpt_release_path(done_ccb->ccb_h.path); 5224 free(done_ccb->ccb_h.path, M_TEMP); 5225 free(done_ccb, M_TEMP); 5226 } 5227 5228 static cam_status 5229 proberegister(struct cam_periph *periph, void *arg) 5230 { 5231 union ccb *request_ccb; /* CCB representing the probe request */ 5232 probe_softc *softc; 5233 5234 request_ccb = (union ccb *)arg; 5235 if (periph == NULL) { 5236 printf("proberegister: periph was NULL!!\n"); 5237 return(CAM_REQ_CMP_ERR); 5238 } 5239 5240 if (request_ccb == NULL) { 5241 printf("proberegister: no probe CCB, " 5242 "can't register device\n"); 5243 return(CAM_REQ_CMP_ERR); 5244 } 5245 5246 softc = (probe_softc *)malloc(sizeof(*softc), M_TEMP, M_NOWAIT); 5247 5248 if (softc == NULL) { 5249 printf("proberegister: Unable to probe new device. " 5250 "Unable to allocate softc\n"); 5251 return(CAM_REQ_CMP_ERR); 5252 } 5253 TAILQ_INIT(&softc->request_ccbs); 5254 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5255 periph_links.tqe); 5256 softc->flags = 0; 5257 periph->softc = softc; 5258 cam_periph_acquire(periph); 5259 /* 5260 * Ensure we've waited at least a bus settle 5261 * delay before attempting to probe the device. 5262 * For HBAs that don't do bus resets, this won't make a difference. 5263 */ 5264 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5265 SCSI_DELAY); 5266 probeschedule(periph); 5267 return(CAM_REQ_CMP); 5268 } 5269 5270 static void 5271 probeschedule(struct cam_periph *periph) 5272 { 5273 struct ccb_pathinq cpi; 5274 union ccb *ccb; 5275 probe_softc *softc; 5276 5277 softc = (probe_softc *)periph->softc; 5278 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5279 5280 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5281 cpi.ccb_h.func_code = XPT_PATH_INQ; 5282 xpt_action((union ccb *)&cpi); 5283 5284 /* 5285 * If a device has gone away and another device, or the same one, 5286 * is back in the same place, it should have a unit attention 5287 * condition pending. It will not report the unit attention in 5288 * response to an inquiry, which may leave invalid transfer 5289 * negotiations in effect. The TUR will reveal the unit attention 5290 * condition. Only send the TUR for lun 0, since some devices 5291 * will get confused by commands other than inquiry to non-existent 5292 * luns. If you think a device has gone away start your scan from 5293 * lun 0. This will insure that any bogus transfer settings are 5294 * invalidated. 5295 * 5296 * If we haven't seen the device before and the controller supports 5297 * some kind of transfer negotiation, negotiate with the first 5298 * sent command if no bus reset was performed at startup. This 5299 * ensures that the device is not confused by transfer negotiation 5300 * settings left over by loader or BIOS action. 5301 */ 5302 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5303 && (ccb->ccb_h.target_lun == 0)) { 5304 softc->action = PROBE_TUR; 5305 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5306 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5307 proberequestdefaultnegotiation(periph); 5308 softc->action = PROBE_INQUIRY; 5309 } else { 5310 softc->action = PROBE_INQUIRY; 5311 } 5312 5313 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5314 softc->flags |= PROBE_NO_ANNOUNCE; 5315 else 5316 softc->flags &= ~PROBE_NO_ANNOUNCE; 5317 5318 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5319 } 5320 5321 static void 5322 probestart(struct cam_periph *periph, union ccb *start_ccb) 5323 { 5324 /* Probe the device that our peripheral driver points to */ 5325 struct ccb_scsiio *csio; 5326 probe_softc *softc; 5327 5328 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5329 5330 softc = (probe_softc *)periph->softc; 5331 csio = &start_ccb->csio; 5332 5333 switch (softc->action) { 5334 case PROBE_TUR: 5335 case PROBE_TUR_FOR_NEGOTIATION: 5336 { 5337 scsi_test_unit_ready(csio, 5338 /*retries*/4, 5339 probedone, 5340 MSG_SIMPLE_Q_TAG, 5341 SSD_FULL_SIZE, 5342 /*timeout*/60000); 5343 break; 5344 } 5345 case PROBE_INQUIRY: 5346 case PROBE_FULL_INQUIRY: 5347 { 5348 u_int inquiry_len; 5349 struct scsi_inquiry_data *inq_buf; 5350 5351 inq_buf = &periph->path->device->inq_data; 5352 /* 5353 * If the device is currently configured, we calculate an 5354 * MD5 checksum of the inquiry data, and if the serial number 5355 * length is greater than 0, add the serial number data 5356 * into the checksum as well. Once the inquiry and the 5357 * serial number check finish, we attempt to figure out 5358 * whether we still have the same device. 5359 */ 5360 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5361 5362 MD5Init(&softc->context); 5363 MD5Update(&softc->context, (unsigned char *)inq_buf, 5364 sizeof(struct scsi_inquiry_data)); 5365 softc->flags |= PROBE_INQUIRY_CKSUM; 5366 if (periph->path->device->serial_num_len > 0) { 5367 MD5Update(&softc->context, 5368 periph->path->device->serial_num, 5369 periph->path->device->serial_num_len); 5370 softc->flags |= PROBE_SERIAL_CKSUM; 5371 } 5372 MD5Final(softc->digest, &softc->context); 5373 } 5374 5375 if (softc->action == PROBE_INQUIRY) 5376 inquiry_len = SHORT_INQUIRY_LENGTH; 5377 else 5378 inquiry_len = inq_buf->additional_length + 5; 5379 5380 scsi_inquiry(csio, 5381 /*retries*/4, 5382 probedone, 5383 MSG_SIMPLE_Q_TAG, 5384 (u_int8_t *)inq_buf, 5385 inquiry_len, 5386 /*evpd*/FALSE, 5387 /*page_code*/0, 5388 SSD_MIN_SIZE, 5389 /*timeout*/60 * 1000); 5390 break; 5391 } 5392 case PROBE_MODE_SENSE: 5393 { 5394 void *mode_buf; 5395 int mode_buf_len; 5396 5397 mode_buf_len = sizeof(struct scsi_mode_header_6) 5398 + sizeof(struct scsi_mode_blk_desc) 5399 + sizeof(struct scsi_control_page); 5400 mode_buf = malloc(mode_buf_len, M_TEMP, M_NOWAIT); 5401 if (mode_buf != NULL) { 5402 scsi_mode_sense(csio, 5403 /*retries*/4, 5404 probedone, 5405 MSG_SIMPLE_Q_TAG, 5406 /*dbd*/FALSE, 5407 SMS_PAGE_CTRL_CURRENT, 5408 SMS_CONTROL_MODE_PAGE, 5409 mode_buf, 5410 mode_buf_len, 5411 SSD_FULL_SIZE, 5412 /*timeout*/60000); 5413 break; 5414 } 5415 xpt_print_path(periph->path); 5416 printf("Unable to mode sense control page - malloc failure\n"); 5417 softc->action = PROBE_SERIAL_NUM; 5418 /* FALLTHROUGH */ 5419 } 5420 case PROBE_SERIAL_NUM: 5421 { 5422 struct scsi_vpd_unit_serial_number *serial_buf; 5423 struct cam_ed* device; 5424 5425 serial_buf = NULL; 5426 device = periph->path->device; 5427 device->serial_num = NULL; 5428 device->serial_num_len = 0; 5429 5430 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) 5431 serial_buf = (struct scsi_vpd_unit_serial_number *) 5432 malloc(sizeof(*serial_buf), M_TEMP, 5433 M_NOWAIT | M_ZERO); 5434 5435 if (serial_buf != NULL) { 5436 scsi_inquiry(csio, 5437 /*retries*/4, 5438 probedone, 5439 MSG_SIMPLE_Q_TAG, 5440 (u_int8_t *)serial_buf, 5441 sizeof(*serial_buf), 5442 /*evpd*/TRUE, 5443 SVPD_UNIT_SERIAL_NUMBER, 5444 SSD_MIN_SIZE, 5445 /*timeout*/60 * 1000); 5446 break; 5447 } 5448 /* 5449 * We'll have to do without, let our probedone 5450 * routine finish up for us. 5451 */ 5452 start_ccb->csio.data_ptr = NULL; 5453 probedone(periph, start_ccb); 5454 return; 5455 } 5456 } 5457 xpt_action(start_ccb); 5458 } 5459 5460 static void 5461 proberequestdefaultnegotiation(struct cam_periph *periph) 5462 { 5463 struct ccb_trans_settings cts; 5464 5465 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5466 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5467 cts.flags = CCB_TRANS_USER_SETTINGS; 5468 xpt_action((union ccb *)&cts); 5469 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5470 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5471 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5472 xpt_action((union ccb *)&cts); 5473 } 5474 5475 static void 5476 probedone(struct cam_periph *periph, union ccb *done_ccb) 5477 { 5478 probe_softc *softc; 5479 struct cam_path *path; 5480 u_int32_t priority; 5481 5482 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5483 5484 softc = (probe_softc *)periph->softc; 5485 path = done_ccb->ccb_h.path; 5486 priority = done_ccb->ccb_h.pinfo.priority; 5487 5488 switch (softc->action) { 5489 case PROBE_TUR: 5490 { 5491 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5492 5493 if (cam_periph_error(done_ccb, 0, 5494 SF_NO_PRINT, NULL) == ERESTART) 5495 return; 5496 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5497 /* Don't wedge the queue */ 5498 xpt_release_devq(done_ccb->ccb_h.path, 5499 /*count*/1, 5500 /*run_queue*/TRUE); 5501 } 5502 softc->action = PROBE_INQUIRY; 5503 xpt_release_ccb(done_ccb); 5504 xpt_schedule(periph, priority); 5505 return; 5506 } 5507 case PROBE_INQUIRY: 5508 case PROBE_FULL_INQUIRY: 5509 { 5510 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5511 struct scsi_inquiry_data *inq_buf; 5512 u_int8_t periph_qual; 5513 5514 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5515 inq_buf = &path->device->inq_data; 5516 5517 periph_qual = SID_QUAL(inq_buf); 5518 5519 switch(periph_qual) { 5520 case SID_QUAL_LU_CONNECTED: 5521 { 5522 u_int8_t alen; 5523 5524 /* 5525 * We conservatively request only 5526 * SHORT_INQUIRY_LEN bytes of inquiry 5527 * information during our first try 5528 * at sending an INQUIRY. If the device 5529 * has more information to give, 5530 * perform a second request specifying 5531 * the amount of information the device 5532 * is willing to give. 5533 */ 5534 alen = inq_buf->additional_length; 5535 if (softc->action == PROBE_INQUIRY 5536 && alen > (SHORT_INQUIRY_LENGTH - 5)) { 5537 softc->action = PROBE_FULL_INQUIRY; 5538 xpt_release_ccb(done_ccb); 5539 xpt_schedule(periph, priority); 5540 return; 5541 } 5542 5543 xpt_find_quirk(path->device); 5544 5545 if ((inq_buf->flags & SID_CmdQue) != 0) 5546 softc->action = PROBE_MODE_SENSE; 5547 else 5548 softc->action = PROBE_SERIAL_NUM; 5549 5550 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5551 5552 xpt_release_ccb(done_ccb); 5553 xpt_schedule(periph, priority); 5554 return; 5555 } 5556 default: 5557 break; 5558 } 5559 } else if (cam_periph_error(done_ccb, 0, 5560 done_ccb->ccb_h.target_lun > 0 5561 ? SF_RETRY_UA|SF_QUIET_IR 5562 : SF_RETRY_UA, 5563 &softc->saved_ccb) == ERESTART) { 5564 return; 5565 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5566 /* Don't wedge the queue */ 5567 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5568 /*run_queue*/TRUE); 5569 } 5570 /* 5571 * If we get to this point, we got an error status back 5572 * from the inquiry and the error status doesn't require 5573 * automatically retrying the command. Therefore, the 5574 * inquiry failed. If we had inquiry information before 5575 * for this device, but this latest inquiry command failed, 5576 * the device has probably gone away. If this device isn't 5577 * already marked unconfigured, notify the peripheral 5578 * drivers that this device is no more. 5579 */ 5580 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5581 /* Send the async notification. */ 5582 xpt_async(AC_LOST_DEVICE, path, NULL); 5583 5584 xpt_release_ccb(done_ccb); 5585 break; 5586 } 5587 case PROBE_MODE_SENSE: 5588 { 5589 struct ccb_scsiio *csio; 5590 struct scsi_mode_header_6 *mode_hdr; 5591 5592 csio = &done_ccb->csio; 5593 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5594 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5595 struct scsi_control_page *page; 5596 u_int8_t *offset; 5597 5598 offset = ((u_int8_t *)&mode_hdr[1]) 5599 + mode_hdr->blk_desc_len; 5600 page = (struct scsi_control_page *)offset; 5601 path->device->queue_flags = page->queue_flags; 5602 } else if (cam_periph_error(done_ccb, 0, 5603 SF_RETRY_UA|SF_NO_PRINT, 5604 &softc->saved_ccb) == ERESTART) { 5605 return; 5606 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5607 /* Don't wedge the queue */ 5608 xpt_release_devq(done_ccb->ccb_h.path, 5609 /*count*/1, /*run_queue*/TRUE); 5610 } 5611 xpt_release_ccb(done_ccb); 5612 free(mode_hdr, M_TEMP); 5613 softc->action = PROBE_SERIAL_NUM; 5614 xpt_schedule(periph, priority); 5615 return; 5616 } 5617 case PROBE_SERIAL_NUM: 5618 { 5619 struct ccb_scsiio *csio; 5620 struct scsi_vpd_unit_serial_number *serial_buf; 5621 u_int32_t priority; 5622 int changed; 5623 int have_serialnum; 5624 5625 changed = 1; 5626 have_serialnum = 0; 5627 csio = &done_ccb->csio; 5628 priority = done_ccb->ccb_h.pinfo.priority; 5629 serial_buf = 5630 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5631 5632 /* Clean up from previous instance of this device */ 5633 if (path->device->serial_num != NULL) { 5634 free(path->device->serial_num, M_DEVBUF); 5635 path->device->serial_num = NULL; 5636 path->device->serial_num_len = 0; 5637 } 5638 5639 if (serial_buf == NULL) { 5640 /* 5641 * Don't process the command as it was never sent 5642 */ 5643 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5644 && (serial_buf->length > 0)) { 5645 5646 have_serialnum = 1; 5647 path->device->serial_num = 5648 (u_int8_t *)malloc((serial_buf->length + 1), 5649 M_DEVBUF, M_NOWAIT); 5650 if (path->device->serial_num != NULL) { 5651 bcopy(serial_buf->serial_num, 5652 path->device->serial_num, 5653 serial_buf->length); 5654 path->device->serial_num_len = 5655 serial_buf->length; 5656 path->device->serial_num[serial_buf->length] 5657 = '\0'; 5658 } 5659 } else if (cam_periph_error(done_ccb, 0, 5660 SF_RETRY_UA|SF_NO_PRINT, 5661 &softc->saved_ccb) == ERESTART) { 5662 return; 5663 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5664 /* Don't wedge the queue */ 5665 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5666 /*run_queue*/TRUE); 5667 } 5668 5669 /* 5670 * Let's see if we have seen this device before. 5671 */ 5672 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5673 MD5_CTX context; 5674 u_int8_t digest[16]; 5675 5676 MD5Init(&context); 5677 5678 MD5Update(&context, 5679 (unsigned char *)&path->device->inq_data, 5680 sizeof(struct scsi_inquiry_data)); 5681 5682 if (have_serialnum) 5683 MD5Update(&context, serial_buf->serial_num, 5684 serial_buf->length); 5685 5686 MD5Final(digest, &context); 5687 if (bcmp(softc->digest, digest, 16) == 0) 5688 changed = 0; 5689 5690 /* 5691 * XXX Do we need to do a TUR in order to ensure 5692 * that the device really hasn't changed??? 5693 */ 5694 if ((changed != 0) 5695 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5696 xpt_async(AC_LOST_DEVICE, path, NULL); 5697 } 5698 if (serial_buf != NULL) 5699 free(serial_buf, M_TEMP); 5700 5701 if (changed != 0) { 5702 /* 5703 * Now that we have all the necessary 5704 * information to safely perform transfer 5705 * negotiations... Controllers don't perform 5706 * any negotiation or tagged queuing until 5707 * after the first XPT_SET_TRAN_SETTINGS ccb is 5708 * received. So, on a new device, just retreive 5709 * the user settings, and set them as the current 5710 * settings to set the device up. 5711 */ 5712 proberequestdefaultnegotiation(periph); 5713 xpt_release_ccb(done_ccb); 5714 5715 /* 5716 * Perform a TUR to allow the controller to 5717 * perform any necessary transfer negotiation. 5718 */ 5719 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5720 xpt_schedule(periph, priority); 5721 return; 5722 } 5723 xpt_release_ccb(done_ccb); 5724 break; 5725 } 5726 case PROBE_TUR_FOR_NEGOTIATION: 5727 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5728 /* Don't wedge the queue */ 5729 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5730 /*run_queue*/TRUE); 5731 } 5732 5733 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5734 5735 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5736 /* Inform the XPT that a new device has been found */ 5737 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5738 xpt_action(done_ccb); 5739 5740 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5741 } 5742 xpt_release_ccb(done_ccb); 5743 break; 5744 } 5745 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5746 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5747 done_ccb->ccb_h.status = CAM_REQ_CMP; 5748 xpt_done(done_ccb); 5749 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5750 cam_periph_invalidate(periph); 5751 cam_periph_release(periph); 5752 } else { 5753 probeschedule(periph); 5754 } 5755 } 5756 5757 static void 5758 probecleanup(struct cam_periph *periph) 5759 { 5760 free(periph->softc, M_TEMP); 5761 } 5762 5763 static void 5764 xpt_find_quirk(struct cam_ed *device) 5765 { 5766 caddr_t match; 5767 5768 match = cam_quirkmatch((caddr_t)&device->inq_data, 5769 (caddr_t)xpt_quirk_table, 5770 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5771 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5772 5773 if (match == NULL) 5774 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5775 5776 device->quirk = (struct xpt_quirk_entry *)match; 5777 } 5778 5779 static void 5780 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5781 int async_update) 5782 { 5783 struct cam_sim *sim; 5784 int qfrozen; 5785 5786 sim = cts->ccb_h.path->bus->sim; 5787 if (async_update == FALSE) { 5788 struct scsi_inquiry_data *inq_data; 5789 struct ccb_pathinq cpi; 5790 struct ccb_trans_settings cur_cts; 5791 5792 if (device == NULL) { 5793 cts->ccb_h.status = CAM_PATH_INVALID; 5794 xpt_done((union ccb *)cts); 5795 return; 5796 } 5797 5798 /* 5799 * Perform sanity checking against what the 5800 * controller and device can do. 5801 */ 5802 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 5803 cpi.ccb_h.func_code = XPT_PATH_INQ; 5804 xpt_action((union ccb *)&cpi); 5805 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 5806 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5807 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 5808 xpt_action((union ccb *)&cur_cts); 5809 inq_data = &device->inq_data; 5810 5811 /* Fill in any gaps in what the user gave us */ 5812 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 5813 cts->sync_period = cur_cts.sync_period; 5814 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 5815 cts->sync_offset = cur_cts.sync_offset; 5816 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 5817 cts->bus_width = cur_cts.bus_width; 5818 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 5819 cts->flags &= ~CCB_TRANS_DISC_ENB; 5820 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 5821 } 5822 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 5823 cts->flags &= ~CCB_TRANS_TAG_ENB; 5824 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 5825 } 5826 5827 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 5828 && (inq_data->flags & SID_Sync) == 0) 5829 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 5830 || (cts->sync_offset == 0) 5831 || (cts->sync_period == 0)) { 5832 /* Force async */ 5833 cts->sync_period = 0; 5834 cts->sync_offset = 0; 5835 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) { 5836 5837 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 5838 && cts->sync_period <= 0x9) { 5839 /* 5840 * Don't allow DT transmission rates if the 5841 * device does not support it. 5842 */ 5843 cts->sync_period = 0xa; 5844 } 5845 if ((inq_data->spi3data & SID_SPI_IUS) == 0 5846 && cts->sync_period <= 0x8) { 5847 /* 5848 * Don't allow PACE transmission rates 5849 * if the device does support packetized 5850 * transfers. 5851 */ 5852 cts->sync_period = 0x9; 5853 } 5854 } 5855 5856 switch (cts->bus_width) { 5857 case MSG_EXT_WDTR_BUS_32_BIT: 5858 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5859 || (inq_data->flags & SID_WBus32) != 0) 5860 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 5861 break; 5862 /* Fall Through to 16-bit */ 5863 case MSG_EXT_WDTR_BUS_16_BIT: 5864 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5865 || (inq_data->flags & SID_WBus16) != 0) 5866 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 5867 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 5868 break; 5869 } 5870 /* Fall Through to 8-bit */ 5871 default: /* New bus width?? */ 5872 case MSG_EXT_WDTR_BUS_8_BIT: 5873 /* All targets can do this */ 5874 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 5875 break; 5876 } 5877 5878 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 5879 /* 5880 * Can't tag queue without disconnection. 5881 */ 5882 cts->flags &= ~CCB_TRANS_TAG_ENB; 5883 cts->valid |= CCB_TRANS_TQ_VALID; 5884 } 5885 5886 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 5887 || (inq_data->flags & SID_CmdQue) == 0 5888 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 5889 || (device->quirk->mintags == 0)) { 5890 /* 5891 * Can't tag on hardware that doesn't support, 5892 * doesn't have it enabled, or has broken tag support. 5893 */ 5894 cts->flags &= ~CCB_TRANS_TAG_ENB; 5895 } 5896 } 5897 5898 qfrozen = FALSE; 5899 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 5900 int device_tagenb; 5901 5902 /* 5903 * If we are transitioning from tags to no-tags or 5904 * vice-versa, we need to carefully freeze and restart 5905 * the queue so that we don't overlap tagged and non-tagged 5906 * commands. We also temporarily stop tags if there is 5907 * a change in transfer negotiation settings to allow 5908 * "tag-less" negotiation. 5909 */ 5910 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5911 || (device->inq_flags & SID_CmdQue) != 0) 5912 device_tagenb = TRUE; 5913 else 5914 device_tagenb = FALSE; 5915 5916 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 5917 && device_tagenb == FALSE) 5918 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 5919 && device_tagenb == TRUE)) { 5920 5921 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 5922 /* 5923 * Delay change to use tags until after a 5924 * few commands have gone to this device so 5925 * the controller has time to perform transfer 5926 * negotiations without tagged messages getting 5927 * in the way. 5928 */ 5929 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 5930 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 5931 } else { 5932 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 5933 qfrozen = TRUE; 5934 device->inq_flags &= ~SID_CmdQue; 5935 xpt_dev_ccbq_resize(cts->ccb_h.path, 5936 sim->max_dev_openings); 5937 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5938 device->tag_delay_count = 0; 5939 } 5940 } 5941 } 5942 5943 if (async_update == FALSE) { 5944 /* 5945 * If we are currently performing tagged transactions to 5946 * this device and want to change its negotiation parameters, 5947 * go non-tagged for a bit to give the controller a chance to 5948 * negotiate unhampered by tag messages. 5949 */ 5950 if ((device->inq_flags & SID_CmdQue) != 0 5951 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 5952 CCB_TRANS_SYNC_OFFSET_VALID| 5953 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 5954 xpt_toggle_tags(cts->ccb_h.path); 5955 5956 (*(sim->sim_action))(sim, (union ccb *)cts); 5957 } 5958 5959 if (qfrozen) { 5960 struct ccb_relsim crs; 5961 5962 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 5963 /*priority*/1); 5964 crs.ccb_h.func_code = XPT_REL_SIMQ; 5965 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5966 crs.openings 5967 = crs.release_timeout 5968 = crs.qfrozen_cnt 5969 = 0; 5970 xpt_action((union ccb *)&crs); 5971 } 5972 } 5973 5974 static void 5975 xpt_toggle_tags(struct cam_path *path) 5976 { 5977 struct cam_ed *dev; 5978 5979 /* 5980 * Give controllers a chance to renegotiate 5981 * before starting tag operations. We 5982 * "toggle" tagged queuing off then on 5983 * which causes the tag enable command delay 5984 * counter to come into effect. 5985 */ 5986 dev = path->device; 5987 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5988 || ((dev->inq_flags & SID_CmdQue) != 0 5989 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 5990 struct ccb_trans_settings cts; 5991 5992 xpt_setup_ccb(&cts.ccb_h, path, 1); 5993 cts.flags = 0; 5994 cts.valid = CCB_TRANS_TQ_VALID; 5995 xpt_set_transfer_settings(&cts, path->device, 5996 /*async_update*/TRUE); 5997 cts.flags = CCB_TRANS_TAG_ENB; 5998 xpt_set_transfer_settings(&cts, path->device, 5999 /*async_update*/TRUE); 6000 } 6001 } 6002 6003 static void 6004 xpt_start_tags(struct cam_path *path) 6005 { 6006 struct ccb_relsim crs; 6007 struct cam_ed *device; 6008 struct cam_sim *sim; 6009 int newopenings; 6010 6011 device = path->device; 6012 sim = path->bus->sim; 6013 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6014 xpt_freeze_devq(path, /*count*/1); 6015 device->inq_flags |= SID_CmdQue; 6016 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 6017 xpt_dev_ccbq_resize(path, newopenings); 6018 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6019 crs.ccb_h.func_code = XPT_REL_SIMQ; 6020 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6021 crs.openings 6022 = crs.release_timeout 6023 = crs.qfrozen_cnt 6024 = 0; 6025 xpt_action((union ccb *)&crs); 6026 } 6027 6028 static int busses_to_config; 6029 static int busses_to_reset; 6030 6031 static int 6032 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6033 { 6034 if (bus->path_id != CAM_XPT_PATH_ID) { 6035 struct cam_path path; 6036 struct ccb_pathinq cpi; 6037 int can_negotiate; 6038 6039 busses_to_config++; 6040 xpt_compile_path(&path, NULL, bus->path_id, 6041 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6042 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6043 cpi.ccb_h.func_code = XPT_PATH_INQ; 6044 xpt_action((union ccb *)&cpi); 6045 can_negotiate = cpi.hba_inquiry; 6046 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6047 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6048 && can_negotiate) 6049 busses_to_reset++; 6050 xpt_release_path(&path); 6051 } 6052 6053 return(1); 6054 } 6055 6056 static int 6057 xptconfigfunc(struct cam_eb *bus, void *arg) 6058 { 6059 struct cam_path *path; 6060 union ccb *work_ccb; 6061 6062 if (bus->path_id != CAM_XPT_PATH_ID) { 6063 cam_status status; 6064 int can_negotiate; 6065 6066 work_ccb = xpt_alloc_ccb(); 6067 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6068 CAM_TARGET_WILDCARD, 6069 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6070 printf("xptconfigfunc: xpt_create_path failed with " 6071 "status %#x for bus %d\n", status, bus->path_id); 6072 printf("xptconfigfunc: halting bus configuration\n"); 6073 xpt_free_ccb(work_ccb); 6074 busses_to_config--; 6075 xpt_finishconfig(xpt_periph, NULL); 6076 return(0); 6077 } 6078 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6079 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6080 xpt_action(work_ccb); 6081 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6082 printf("xptconfigfunc: CPI failed on bus %d " 6083 "with status %d\n", bus->path_id, 6084 work_ccb->ccb_h.status); 6085 xpt_finishconfig(xpt_periph, work_ccb); 6086 return(1); 6087 } 6088 6089 can_negotiate = work_ccb->cpi.hba_inquiry; 6090 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6091 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6092 && (can_negotiate != 0)) { 6093 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6094 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6095 work_ccb->ccb_h.cbfcnp = NULL; 6096 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6097 ("Resetting Bus\n")); 6098 xpt_action(work_ccb); 6099 xpt_finishconfig(xpt_periph, work_ccb); 6100 } else { 6101 /* Act as though we performed a successful BUS RESET */ 6102 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6103 xpt_finishconfig(xpt_periph, work_ccb); 6104 } 6105 } 6106 6107 return(1); 6108 } 6109 6110 static void 6111 xpt_config(void *arg) 6112 { 6113 /* Now that interrupts are enabled, go find our devices */ 6114 6115 #ifdef CAMDEBUG 6116 /* Setup debugging flags and path */ 6117 #ifdef CAM_DEBUG_FLAGS 6118 cam_dflags = CAM_DEBUG_FLAGS; 6119 #else /* !CAM_DEBUG_FLAGS */ 6120 cam_dflags = CAM_DEBUG_NONE; 6121 #endif /* CAM_DEBUG_FLAGS */ 6122 #ifdef CAM_DEBUG_BUS 6123 if (cam_dflags != CAM_DEBUG_NONE) { 6124 if (xpt_create_path(&cam_dpath, xpt_periph, 6125 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6126 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6127 printf("xpt_config: xpt_create_path() failed for debug" 6128 " target %d:%d:%d, debugging disabled\n", 6129 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6130 cam_dflags = CAM_DEBUG_NONE; 6131 } 6132 } else 6133 cam_dpath = NULL; 6134 #else /* !CAM_DEBUG_BUS */ 6135 cam_dpath = NULL; 6136 #endif /* CAM_DEBUG_BUS */ 6137 #endif /* CAMDEBUG */ 6138 6139 /* 6140 * Scan all installed busses. 6141 */ 6142 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6143 6144 if (busses_to_config == 0) { 6145 /* Call manually because we don't have any busses */ 6146 xpt_finishconfig(xpt_periph, NULL); 6147 } else { 6148 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) { 6149 printf("Waiting %d seconds for SCSI " 6150 "devices to settle\n", SCSI_DELAY/1000); 6151 } 6152 xpt_for_all_busses(xptconfigfunc, NULL); 6153 } 6154 } 6155 6156 /* 6157 * If the given device only has one peripheral attached to it, and if that 6158 * peripheral is the passthrough driver, announce it. This insures that the 6159 * user sees some sort of announcement for every peripheral in their system. 6160 */ 6161 static int 6162 xptpassannouncefunc(struct cam_ed *device, void *arg) 6163 { 6164 struct cam_periph *periph; 6165 int i; 6166 6167 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6168 periph = SLIST_NEXT(periph, periph_links), i++); 6169 6170 periph = SLIST_FIRST(&device->periphs); 6171 if ((i == 1) 6172 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6173 xpt_announce_periph(periph, NULL); 6174 6175 return(1); 6176 } 6177 6178 static void 6179 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6180 { 6181 struct periph_driver **p_drv; 6182 int i; 6183 6184 if (done_ccb != NULL) { 6185 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6186 ("xpt_finishconfig\n")); 6187 switch(done_ccb->ccb_h.func_code) { 6188 case XPT_RESET_BUS: 6189 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6190 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6191 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6192 xpt_action(done_ccb); 6193 return; 6194 } 6195 /* FALLTHROUGH */ 6196 case XPT_SCAN_BUS: 6197 default: 6198 xpt_free_path(done_ccb->ccb_h.path); 6199 busses_to_config--; 6200 break; 6201 } 6202 } 6203 6204 if (busses_to_config == 0) { 6205 /* Register all the peripheral drivers */ 6206 /* XXX This will have to change when we have loadable modules */ 6207 p_drv = (struct periph_driver **)periphdriver_set.ls_items; 6208 for (i = 0; p_drv[i] != NULL; i++) { 6209 (*p_drv[i]->init)(); 6210 } 6211 6212 /* 6213 * Check for devices with no "standard" peripheral driver 6214 * attached. For any devices like that, announce the 6215 * passthrough driver so the user will see something. 6216 */ 6217 xpt_for_all_devices(xptpassannouncefunc, NULL); 6218 6219 /* Release our hook so that the boot can continue. */ 6220 config_intrhook_disestablish(xpt_config_hook); 6221 free(xpt_config_hook, M_TEMP); 6222 xpt_config_hook = NULL; 6223 } 6224 if (done_ccb != NULL) 6225 xpt_free_ccb(done_ccb); 6226 } 6227 6228 static void 6229 xptaction(struct cam_sim *sim, union ccb *work_ccb) 6230 { 6231 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6232 6233 switch (work_ccb->ccb_h.func_code) { 6234 /* Common cases first */ 6235 case XPT_PATH_INQ: /* Path routing inquiry */ 6236 { 6237 struct ccb_pathinq *cpi; 6238 6239 cpi = &work_ccb->cpi; 6240 cpi->version_num = 1; /* XXX??? */ 6241 cpi->hba_inquiry = 0; 6242 cpi->target_sprt = 0; 6243 cpi->hba_misc = 0; 6244 cpi->hba_eng_cnt = 0; 6245 cpi->max_target = 0; 6246 cpi->max_lun = 0; 6247 cpi->initiator_id = 0; 6248 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6249 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6250 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6251 cpi->unit_number = sim->unit_number; 6252 cpi->bus_id = sim->bus_id; 6253 cpi->base_transfer_speed = 0; 6254 cpi->ccb_h.status = CAM_REQ_CMP; 6255 xpt_done(work_ccb); 6256 break; 6257 } 6258 default: 6259 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6260 xpt_done(work_ccb); 6261 break; 6262 } 6263 } 6264 6265 /* 6266 * The xpt as a "controller" has no interrupt sources, so polling 6267 * is a no-op. 6268 */ 6269 static void 6270 xptpoll(struct cam_sim *sim) 6271 { 6272 } 6273 6274 /* 6275 * Should only be called by the machine interrupt dispatch routines, 6276 * so put these prototypes here instead of in the header. 6277 */ 6278 6279 static void 6280 swi_camnet(void) 6281 { 6282 camisr(&cam_netq); 6283 } 6284 6285 static void 6286 swi_cambio(void) 6287 { 6288 camisr(&cam_bioq); 6289 } 6290 6291 static void 6292 camisr(cam_isrq_t *queue) 6293 { 6294 int s; 6295 struct ccb_hdr *ccb_h; 6296 6297 s = splcam(); 6298 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6299 int runq; 6300 6301 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6302 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6303 splx(s); 6304 6305 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6306 ("camisr\n")); 6307 6308 runq = FALSE; 6309 6310 if (ccb_h->flags & CAM_HIGH_POWER) { 6311 struct highpowerlist *hphead; 6312 struct cam_ed *device; 6313 union ccb *send_ccb; 6314 6315 hphead = &highpowerq; 6316 6317 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6318 6319 /* 6320 * Increment the count since this command is done. 6321 */ 6322 num_highpower++; 6323 6324 /* 6325 * Any high powered commands queued up? 6326 */ 6327 if (send_ccb != NULL) { 6328 device = send_ccb->ccb_h.path->device; 6329 6330 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6331 6332 xpt_release_devq(send_ccb->ccb_h.path, 6333 /*count*/1, /*runqueue*/TRUE); 6334 } 6335 } 6336 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6337 struct cam_ed *dev; 6338 6339 dev = ccb_h->path->device; 6340 6341 s = splcam(); 6342 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6343 6344 ccb_h->path->bus->sim->devq->send_active--; 6345 ccb_h->path->bus->sim->devq->send_openings++; 6346 splx(s); 6347 6348 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6349 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6350 && (dev->ccbq.dev_active == 0))) { 6351 6352 xpt_release_devq(ccb_h->path, /*count*/1, 6353 /*run_queue*/TRUE); 6354 } 6355 6356 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6357 && (--dev->tag_delay_count == 0)) 6358 xpt_start_tags(ccb_h->path); 6359 6360 if ((dev->ccbq.queue.entries > 0) 6361 && (dev->qfrozen_cnt == 0) 6362 && (device_is_send_queued(dev) == 0)) { 6363 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6364 dev); 6365 } 6366 } 6367 6368 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6369 xpt_release_simq(ccb_h->path->bus->sim, 6370 /*run_queue*/TRUE); 6371 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6372 runq = FALSE; 6373 } 6374 6375 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6376 && (ccb_h->status & CAM_DEV_QFRZN)) { 6377 xpt_release_devq(ccb_h->path, /*count*/1, 6378 /*run_queue*/TRUE); 6379 ccb_h->status &= ~CAM_DEV_QFRZN; 6380 } else if (runq) { 6381 xpt_run_dev_sendq(ccb_h->path->bus); 6382 } 6383 6384 /* Call the peripheral driver's callback */ 6385 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6386 6387 /* Raise IPL for while test */ 6388 s = splcam(); 6389 } 6390 splx(s); 6391 } 6392