1 /* 2 * Implementation of the Common Access Method Transport (XPT) layer. 3 * 4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs. 5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions, and the following disclaimer, 13 * without modification, immediately at the beginning of the file. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $ 30 * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.19 2004/11/14 16:48:36 eirikn Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/fcntl.h> 40 #include <sys/md5.h> 41 #include <sys/devicestat.h> 42 #include <sys/interrupt.h> 43 #include <sys/bus.h> 44 #include <sys/thread.h> 45 #include <sys/thread2.h> 46 47 #ifdef PC98 48 #include <pc98/pc98/pc98_machdep.h> /* geometry translation */ 49 #endif 50 51 #include <machine/clock.h> 52 #include <machine/ipl.h> 53 54 #include "cam.h" 55 #include "cam_ccb.h" 56 #include "cam_periph.h" 57 #include "cam_sim.h" 58 #include "cam_xpt.h" 59 #include "cam_xpt_sim.h" 60 #include "cam_xpt_periph.h" 61 #include "cam_debug.h" 62 63 #include "scsi/scsi_all.h" 64 #include "scsi/scsi_message.h" 65 #include "scsi/scsi_pass.h" 66 #include "opt_cam.h" 67 68 /* Datastructures internal to the xpt layer */ 69 70 /* 71 * Definition of an async handler callback block. These are used to add 72 * SIMs and peripherals to the async callback lists. 73 */ 74 struct async_node { 75 SLIST_ENTRY(async_node) links; 76 u_int32_t event_enable; /* Async Event enables */ 77 void (*callback)(void *arg, u_int32_t code, 78 struct cam_path *path, void *args); 79 void *callback_arg; 80 }; 81 82 SLIST_HEAD(async_list, async_node); 83 SLIST_HEAD(periph_list, cam_periph); 84 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 85 86 /* 87 * This is the maximum number of high powered commands (e.g. start unit) 88 * that can be outstanding at a particular time. 89 */ 90 #ifndef CAM_MAX_HIGHPOWER 91 #define CAM_MAX_HIGHPOWER 4 92 #endif 93 94 /* number of high powered commands that can go through right now */ 95 static int num_highpower = CAM_MAX_HIGHPOWER; 96 97 /* 98 * Structure for queueing a device in a run queue. 99 * There is one run queue for allocating new ccbs, 100 * and another for sending ccbs to the controller. 101 */ 102 struct cam_ed_qinfo { 103 cam_pinfo pinfo; 104 struct cam_ed *device; 105 }; 106 107 /* 108 * The CAM EDT (Existing Device Table) contains the device information for 109 * all devices for all busses in the system. The table contains a 110 * cam_ed structure for each device on the bus. 111 */ 112 struct cam_ed { 113 TAILQ_ENTRY(cam_ed) links; 114 struct cam_ed_qinfo alloc_ccb_entry; 115 struct cam_ed_qinfo send_ccb_entry; 116 struct cam_et *target; 117 lun_id_t lun_id; 118 struct camq drvq; /* 119 * Queue of type drivers wanting to do 120 * work on this device. 121 */ 122 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 123 struct async_list asyncs; /* Async callback info for this B/T/L */ 124 struct periph_list periphs; /* All attached devices */ 125 u_int generation; /* Generation number */ 126 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 127 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 128 /* Storage for the inquiry data */ 129 struct scsi_inquiry_data inq_data; 130 u_int8_t inq_flags; /* 131 * Current settings for inquiry flags. 132 * This allows us to override settings 133 * like disconnection and tagged 134 * queuing for a device. 135 */ 136 u_int8_t queue_flags; /* Queue flags from the control page */ 137 u_int8_t serial_num_len; 138 u_int8_t *serial_num; 139 u_int32_t qfrozen_cnt; 140 u_int32_t flags; 141 #define CAM_DEV_UNCONFIGURED 0x01 142 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 143 #define CAM_DEV_REL_ON_COMPLETE 0x04 144 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 145 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 146 #define CAM_DEV_TAG_AFTER_COUNT 0x20 147 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 148 u_int32_t tag_delay_count; 149 #define CAM_TAG_DELAY_COUNT 5 150 u_int32_t refcount; 151 struct callout c_handle; 152 }; 153 154 /* 155 * Each target is represented by an ET (Existing Target). These 156 * entries are created when a target is successfully probed with an 157 * identify, and removed when a device fails to respond after a number 158 * of retries, or a bus rescan finds the device missing. 159 */ 160 struct cam_et { 161 TAILQ_HEAD(, cam_ed) ed_entries; 162 TAILQ_ENTRY(cam_et) links; 163 struct cam_eb *bus; 164 target_id_t target_id; 165 u_int32_t refcount; 166 u_int generation; 167 struct timeval last_reset; /* uptime of last reset */ 168 }; 169 170 /* 171 * Each bus is represented by an EB (Existing Bus). These entries 172 * are created by calls to xpt_bus_register and deleted by calls to 173 * xpt_bus_deregister. 174 */ 175 struct cam_eb { 176 TAILQ_HEAD(, cam_et) et_entries; 177 TAILQ_ENTRY(cam_eb) links; 178 path_id_t path_id; 179 struct cam_sim *sim; 180 struct timeval last_reset; /* uptime of last reset */ 181 u_int32_t flags; 182 #define CAM_EB_RUNQ_SCHEDULED 0x01 183 u_int32_t refcount; 184 u_int generation; 185 }; 186 187 struct cam_path { 188 struct cam_periph *periph; 189 struct cam_eb *bus; 190 struct cam_et *target; 191 struct cam_ed *device; 192 }; 193 194 struct xpt_quirk_entry { 195 struct scsi_inquiry_pattern inq_pat; 196 u_int8_t quirks; 197 #define CAM_QUIRK_NOLUNS 0x01 198 #define CAM_QUIRK_NOSERIAL 0x02 199 #define CAM_QUIRK_HILUNS 0x04 200 u_int mintags; 201 u_int maxtags; 202 }; 203 #define CAM_SCSI2_MAXLUN 8 204 205 typedef enum { 206 XPT_FLAG_OPEN = 0x01 207 } xpt_flags; 208 209 struct xpt_softc { 210 xpt_flags flags; 211 u_int32_t generation; 212 }; 213 214 static const char quantum[] = "QUANTUM"; 215 static const char sony[] = "SONY"; 216 static const char west_digital[] = "WDIGTL"; 217 static const char samsung[] = "SAMSUNG"; 218 static const char seagate[] = "SEAGATE"; 219 static const char microp[] = "MICROP"; 220 221 static struct xpt_quirk_entry xpt_quirk_table[] = 222 { 223 { 224 /* Reports QUEUE FULL for temporary resource shortages */ 225 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 226 /*quirks*/0, /*mintags*/24, /*maxtags*/32 227 }, 228 { 229 /* Reports QUEUE FULL for temporary resource shortages */ 230 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 231 /*quirks*/0, /*mintags*/24, /*maxtags*/32 232 }, 233 { 234 /* Reports QUEUE FULL for temporary resource shortages */ 235 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 236 /*quirks*/0, /*mintags*/24, /*maxtags*/32 237 }, 238 { 239 /* Broken tagged queuing drive */ 240 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 241 /*quirks*/0, /*mintags*/0, /*maxtags*/0 242 }, 243 { 244 /* Broken tagged queuing drive */ 245 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 246 /*quirks*/0, /*mintags*/0, /*maxtags*/0 247 }, 248 { 249 /* Broken tagged queuing drive */ 250 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 251 /*quirks*/0, /*mintags*/0, /*maxtags*/0 252 }, 253 { 254 /* 255 * Unfortunately, the Quantum Atlas III has the same 256 * problem as the Atlas II drives above. 257 * Reported by: "Johan Granlund" <johan@granlund.nu> 258 * 259 * For future reference, the drive with the problem was: 260 * QUANTUM QM39100TD-SW N1B0 261 * 262 * It's possible that Quantum will fix the problem in later 263 * firmware revisions. If that happens, the quirk entry 264 * will need to be made specific to the firmware revisions 265 * with the problem. 266 * 267 */ 268 /* Reports QUEUE FULL for temporary resource shortages */ 269 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 270 /*quirks*/0, /*mintags*/24, /*maxtags*/32 271 }, 272 { 273 /* 274 * 18 Gig Atlas III, same problem as the 9G version. 275 * Reported by: Andre Albsmeier 276 * <andre.albsmeier@mchp.siemens.de> 277 * 278 * For future reference, the drive with the problem was: 279 * QUANTUM QM318000TD-S N491 280 */ 281 /* Reports QUEUE FULL for temporary resource shortages */ 282 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 283 /*quirks*/0, /*mintags*/24, /*maxtags*/32 284 }, 285 { 286 /* 287 * Broken tagged queuing drive 288 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 289 * and: Martin Renters <martin@tdc.on.ca> 290 */ 291 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 292 /*quirks*/0, /*mintags*/0, /*maxtags*/0 293 }, 294 /* 295 * The Seagate Medalist Pro drives have very poor write 296 * performance with anything more than 2 tags. 297 * 298 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 299 * Drive: <SEAGATE ST36530N 1444> 300 * 301 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 302 * Drive: <SEAGATE ST34520W 1281> 303 * 304 * No one has actually reported that the 9G version 305 * (ST39140*) of the Medalist Pro has the same problem, but 306 * we're assuming that it does because the 4G and 6.5G 307 * versions of the drive are broken. 308 */ 309 { 310 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 311 /*quirks*/0, /*mintags*/2, /*maxtags*/2 312 }, 313 { 314 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 315 /*quirks*/0, /*mintags*/2, /*maxtags*/2 316 }, 317 { 318 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 319 /*quirks*/0, /*mintags*/2, /*maxtags*/2 320 }, 321 { 322 /* 323 * Slow when tagged queueing is enabled. Write performance 324 * steadily drops off with more and more concurrent 325 * transactions. Best sequential write performance with 326 * tagged queueing turned off and write caching turned on. 327 * 328 * PR: kern/10398 329 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 330 * Drive: DCAS-34330 w/ "S65A" firmware. 331 * 332 * The drive with the problem had the "S65A" firmware 333 * revision, and has also been reported (by Stephen J. 334 * Roznowski <sjr@home.net>) for a drive with the "S61A" 335 * firmware revision. 336 * 337 * Although no one has reported problems with the 2 gig 338 * version of the DCAS drive, the assumption is that it 339 * has the same problems as the 4 gig version. Therefore 340 * this quirk entries disables tagged queueing for all 341 * DCAS drives. 342 */ 343 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 344 /*quirks*/0, /*mintags*/0, /*maxtags*/0 345 }, 346 { 347 /* Broken tagged queuing drive */ 348 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 349 /*quirks*/0, /*mintags*/0, /*maxtags*/0 350 }, 351 { 352 /* Broken tagged queuing drive */ 353 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 354 /*quirks*/0, /*mintags*/0, /*maxtags*/0 355 }, 356 { 357 /* 358 * Broken tagged queuing drive. 359 * Submitted by: 360 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 361 * in PR kern/9535 362 */ 363 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 364 /*quirks*/0, /*mintags*/0, /*maxtags*/0 365 }, 366 { 367 /* 368 * Slow when tagged queueing is enabled. (1.5MB/sec versus 369 * 8MB/sec.) 370 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 371 * Best performance with these drives is achieved with 372 * tagged queueing turned off, and write caching turned on. 373 */ 374 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 375 /*quirks*/0, /*mintags*/0, /*maxtags*/0 376 }, 377 { 378 /* 379 * Slow when tagged queueing is enabled. (1.5MB/sec versus 380 * 8MB/sec.) 381 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 382 * Best performance with these drives is achieved with 383 * tagged queueing turned off, and write caching turned on. 384 */ 385 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 386 /*quirks*/0, /*mintags*/0, /*maxtags*/0 387 }, 388 { 389 /* 390 * Doesn't handle queue full condition correctly, 391 * so we need to limit maxtags to what the device 392 * can handle instead of determining this automatically. 393 */ 394 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 395 /*quirks*/0, /*mintags*/2, /*maxtags*/32 396 }, 397 { 398 /* Really only one LUN */ 399 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 400 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 401 }, 402 { 403 /* I can't believe we need a quirk for DPT volumes. */ 404 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 405 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 406 /*mintags*/0, /*maxtags*/255 407 }, 408 { 409 /* 410 * Many Sony CDROM drives don't like multi-LUN probing. 411 */ 412 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 413 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 414 }, 415 { 416 /* 417 * This drive doesn't like multiple LUN probing. 418 * Submitted by: Parag Patel <parag@cgt.com> 419 */ 420 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 421 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 422 }, 423 { 424 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 425 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 426 }, 427 { 428 /* 429 * The 8200 doesn't like multi-lun probing, and probably 430 * don't like serial number requests either. 431 */ 432 { 433 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 434 "EXB-8200*", "*" 435 }, 436 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 437 }, 438 { 439 /* 440 * Let's try the same as above, but for a drive that says 441 * it's an IPL-6860 but is actually an EXB 8200. 442 */ 443 { 444 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 445 "IPL-6860*", "*" 446 }, 447 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 448 }, 449 { 450 /* 451 * These Hitachi drives don't like multi-lun probing. 452 * The PR submitter has a DK319H, but says that the Linux 453 * kernel has a similar work-around for the DK312 and DK314, 454 * so all DK31* drives are quirked here. 455 * PR: misc/18793 456 * Submitted by: Paul Haddad <paul@pth.com> 457 */ 458 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 459 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 460 }, 461 { 462 /* 463 * This old revision of the TDC3600 is also SCSI-1, and 464 * hangs upon serial number probing. 465 */ 466 { 467 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 468 " TDC 3600", "U07:" 469 }, 470 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 471 }, 472 { 473 /* 474 * Would repond to all LUNs if asked for. 475 */ 476 { 477 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 478 "CP150", "*" 479 }, 480 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 481 }, 482 { 483 /* 484 * Would repond to all LUNs if asked for. 485 */ 486 { 487 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 488 "96X2*", "*" 489 }, 490 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 491 }, 492 { 493 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 494 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 495 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 496 }, 497 { 498 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 499 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 500 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 501 }, 502 { 503 /* TeraSolutions special settings for TRC-22 RAID */ 504 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 505 /*quirks*/0, /*mintags*/55, /*maxtags*/255 506 }, 507 { 508 /* Veritas Storage Appliance */ 509 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 510 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 511 }, 512 { 513 /* 514 * Would respond to all LUNs. Device type and removable 515 * flag are jumper-selectable. 516 */ 517 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 518 "Tahiti 1", "*" 519 }, 520 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 521 }, 522 { 523 /* Default tagged queuing parameters for all devices */ 524 { 525 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 526 /*vendor*/"*", /*product*/"*", /*revision*/"*" 527 }, 528 /*quirks*/0, /*mintags*/2, /*maxtags*/255 529 }, 530 }; 531 532 static const int xpt_quirk_table_size = 533 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 534 535 typedef enum { 536 DM_RET_COPY = 0x01, 537 DM_RET_FLAG_MASK = 0x0f, 538 DM_RET_NONE = 0x00, 539 DM_RET_STOP = 0x10, 540 DM_RET_DESCEND = 0x20, 541 DM_RET_ERROR = 0x30, 542 DM_RET_ACTION_MASK = 0xf0 543 } dev_match_ret; 544 545 typedef enum { 546 XPT_DEPTH_BUS, 547 XPT_DEPTH_TARGET, 548 XPT_DEPTH_DEVICE, 549 XPT_DEPTH_PERIPH 550 } xpt_traverse_depth; 551 552 struct xpt_traverse_config { 553 xpt_traverse_depth depth; 554 void *tr_func; 555 void *tr_arg; 556 }; 557 558 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 559 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 560 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 561 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 562 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 563 564 /* Transport layer configuration information */ 565 static struct xpt_softc xsoftc; 566 567 /* Queues for our software interrupt handler */ 568 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 569 static cam_isrq_t cam_bioq; 570 static cam_isrq_t cam_netq; 571 572 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 573 static SLIST_HEAD(,ccb_hdr) ccb_freeq; 574 static u_int xpt_max_ccbs; /* 575 * Maximum size of ccb pool. Modified as 576 * devices are added/removed or have their 577 * opening counts changed. 578 */ 579 static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 580 581 struct cam_periph *xpt_periph; 582 583 static periph_init_t xpt_periph_init; 584 585 static periph_init_t probe_periph_init; 586 587 static struct periph_driver xpt_driver = 588 { 589 xpt_periph_init, "xpt", 590 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 591 }; 592 593 static struct periph_driver probe_driver = 594 { 595 probe_periph_init, "probe", 596 TAILQ_HEAD_INITIALIZER(probe_driver.units) 597 }; 598 599 DATA_SET(periphdriver_set, xpt_driver); 600 DATA_SET(periphdriver_set, probe_driver); 601 602 #define XPT_CDEV_MAJOR 104 603 604 static d_open_t xptopen; 605 static d_close_t xptclose; 606 static d_ioctl_t xptioctl; 607 608 static struct cdevsw xpt_cdevsw = { 609 /* name */ "xpt", 610 /* maj */ XPT_CDEV_MAJOR, 611 /* flags */ 0, 612 /* port */ NULL, 613 /* clone */ NULL, 614 615 /* open */ xptopen, 616 /* close */ xptclose, 617 /* read */ noread, 618 /* write */ nowrite, 619 /* ioctl */ xptioctl, 620 /* poll */ nopoll, 621 /* mmap */ nommap, 622 /* strategy */ nostrategy, 623 /* dump */ nodump, 624 /* psize */ nopsize 625 }; 626 627 static struct intr_config_hook *xpt_config_hook; 628 629 /* Registered busses */ 630 static TAILQ_HEAD(,cam_eb) xpt_busses; 631 static u_int bus_generation; 632 633 /* Storage for debugging datastructures */ 634 #ifdef CAMDEBUG 635 struct cam_path *cam_dpath; 636 u_int32_t cam_dflags; 637 u_int32_t cam_debug_delay; 638 #endif 639 640 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 641 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 642 #endif 643 644 /* 645 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 646 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 647 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 648 */ 649 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 650 || defined(CAM_DEBUG_LUN) 651 #ifdef CAMDEBUG 652 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 653 || !defined(CAM_DEBUG_LUN) 654 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 655 and CAM_DEBUG_LUN" 656 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 657 #else /* !CAMDEBUG */ 658 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 659 #endif /* CAMDEBUG */ 660 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 661 662 /* Our boot-time initialization hook */ 663 static void xpt_init(void *); 664 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL); 665 666 static cam_status xpt_compile_path(struct cam_path *new_path, 667 struct cam_periph *perph, 668 path_id_t path_id, 669 target_id_t target_id, 670 lun_id_t lun_id); 671 672 static void xpt_release_path(struct cam_path *path); 673 674 static void xpt_async_bcast(struct async_list *async_head, 675 u_int32_t async_code, 676 struct cam_path *path, 677 void *async_arg); 678 static void xpt_dev_async(u_int32_t async_code, 679 struct cam_eb *bus, 680 struct cam_et *target, 681 struct cam_ed *device, 682 void *async_arg); 683 static path_id_t xptnextfreepathid(void); 684 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 685 static union ccb *xpt_get_ccb(struct cam_ed *device); 686 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 687 u_int32_t new_priority); 688 static void xpt_run_dev_allocq(struct cam_eb *bus); 689 static void xpt_run_dev_sendq(struct cam_eb *bus); 690 static timeout_t xpt_release_devq_timeout; 691 static void xpt_release_bus(struct cam_eb *bus); 692 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 693 int run_queue); 694 static struct cam_et* 695 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 696 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 697 static struct cam_ed* 698 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 699 lun_id_t lun_id); 700 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 701 struct cam_ed *device); 702 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 703 static struct cam_eb* 704 xpt_find_bus(path_id_t path_id); 705 static struct cam_et* 706 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 707 static struct cam_ed* 708 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 709 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 710 static void xpt_scan_lun(struct cam_periph *periph, 711 struct cam_path *path, cam_flags flags, 712 union ccb *ccb); 713 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 714 static xpt_busfunc_t xptconfigbuscountfunc; 715 static xpt_busfunc_t xptconfigfunc; 716 static void xpt_config(void *arg); 717 static xpt_devicefunc_t xptpassannouncefunc; 718 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 719 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 720 static void xptpoll(struct cam_sim *sim); 721 static inthand2_t swi_camnet; 722 static inthand2_t swi_cambio; 723 static void camisr(cam_isrq_t *queue); 724 #if 0 725 static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 726 static void xptasync(struct cam_periph *periph, 727 u_int32_t code, cam_path *path); 728 #endif 729 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 730 int num_patterns, struct cam_eb *bus); 731 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 732 int num_patterns, struct cam_ed *device); 733 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 734 int num_patterns, 735 struct cam_periph *periph); 736 static xpt_busfunc_t xptedtbusfunc; 737 static xpt_targetfunc_t xptedttargetfunc; 738 static xpt_devicefunc_t xptedtdevicefunc; 739 static xpt_periphfunc_t xptedtperiphfunc; 740 static xpt_pdrvfunc_t xptplistpdrvfunc; 741 static xpt_periphfunc_t xptplistperiphfunc; 742 static int xptedtmatch(struct ccb_dev_match *cdm); 743 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 744 static int xptbustraverse(struct cam_eb *start_bus, 745 xpt_busfunc_t *tr_func, void *arg); 746 static int xpttargettraverse(struct cam_eb *bus, 747 struct cam_et *start_target, 748 xpt_targetfunc_t *tr_func, void *arg); 749 static int xptdevicetraverse(struct cam_et *target, 750 struct cam_ed *start_device, 751 xpt_devicefunc_t *tr_func, void *arg); 752 static int xptperiphtraverse(struct cam_ed *device, 753 struct cam_periph *start_periph, 754 xpt_periphfunc_t *tr_func, void *arg); 755 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 756 xpt_pdrvfunc_t *tr_func, void *arg); 757 static int xptpdperiphtraverse(struct periph_driver **pdrv, 758 struct cam_periph *start_periph, 759 xpt_periphfunc_t *tr_func, 760 void *arg); 761 static xpt_busfunc_t xptdefbusfunc; 762 static xpt_targetfunc_t xptdeftargetfunc; 763 static xpt_devicefunc_t xptdefdevicefunc; 764 static xpt_periphfunc_t xptdefperiphfunc; 765 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 766 #ifdef notusedyet 767 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 768 void *arg); 769 #endif 770 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 771 void *arg); 772 #ifdef notusedyet 773 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 774 void *arg); 775 #endif 776 static xpt_devicefunc_t xptsetasyncfunc; 777 static xpt_busfunc_t xptsetasyncbusfunc; 778 static cam_status xptregister(struct cam_periph *periph, 779 void *arg); 780 static cam_status proberegister(struct cam_periph *periph, 781 void *arg); 782 static void probeschedule(struct cam_periph *probe_periph); 783 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 784 static void proberequestdefaultnegotiation(struct cam_periph *periph); 785 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 786 static void probecleanup(struct cam_periph *periph); 787 static void xpt_find_quirk(struct cam_ed *device); 788 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 789 struct cam_ed *device, 790 int async_update); 791 static void xpt_toggle_tags(struct cam_path *path); 792 static void xpt_start_tags(struct cam_path *path); 793 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 794 struct cam_ed *dev); 795 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 796 struct cam_ed *dev); 797 static __inline int periph_is_queued(struct cam_periph *periph); 798 static __inline int device_is_alloc_queued(struct cam_ed *device); 799 static __inline int device_is_send_queued(struct cam_ed *device); 800 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 801 802 static __inline int 803 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 804 { 805 int retval; 806 807 if (dev->ccbq.devq_openings > 0) { 808 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 809 cam_ccbq_resize(&dev->ccbq, 810 dev->ccbq.dev_openings 811 + dev->ccbq.dev_active); 812 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 813 } 814 /* 815 * The priority of a device waiting for CCB resources 816 * is that of the the highest priority peripheral driver 817 * enqueued. 818 */ 819 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 820 &dev->alloc_ccb_entry.pinfo, 821 CAMQ_GET_HEAD(&dev->drvq)->priority); 822 } else { 823 retval = 0; 824 } 825 826 return (retval); 827 } 828 829 static __inline int 830 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 831 { 832 int retval; 833 834 if (dev->ccbq.dev_openings > 0) { 835 /* 836 * The priority of a device waiting for controller 837 * resources is that of the the highest priority CCB 838 * enqueued. 839 */ 840 retval = 841 xpt_schedule_dev(&bus->sim->devq->send_queue, 842 &dev->send_ccb_entry.pinfo, 843 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 844 } else { 845 retval = 0; 846 } 847 return (retval); 848 } 849 850 static __inline int 851 periph_is_queued(struct cam_periph *periph) 852 { 853 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 854 } 855 856 static __inline int 857 device_is_alloc_queued(struct cam_ed *device) 858 { 859 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 860 } 861 862 static __inline int 863 device_is_send_queued(struct cam_ed *device) 864 { 865 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 866 } 867 868 static __inline int 869 dev_allocq_is_runnable(struct cam_devq *devq) 870 { 871 /* 872 * Have work to do. 873 * Have space to do more work. 874 * Allowed to do work. 875 */ 876 return ((devq->alloc_queue.qfrozen_cnt == 0) 877 && (devq->alloc_queue.entries > 0) 878 && (devq->alloc_openings > 0)); 879 } 880 881 static void 882 xpt_periph_init() 883 { 884 cdevsw_add(&xpt_cdevsw, 0, 0); 885 make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 886 } 887 888 static void 889 probe_periph_init() 890 { 891 } 892 893 894 static void 895 xptdone(struct cam_periph *periph, union ccb *done_ccb) 896 { 897 /* Caller will release the CCB */ 898 wakeup(&done_ccb->ccb_h.cbfcnp); 899 } 900 901 static int 902 xptopen(dev_t dev, int flags, int fmt, struct thread *td) 903 { 904 int unit; 905 906 unit = minor(dev) & 0xff; 907 908 /* 909 * Only allow read-write access. 910 */ 911 if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0)) 912 return(EPERM); 913 914 /* 915 * We don't allow nonblocking access. 916 */ 917 if ((flags & O_NONBLOCK) != 0) { 918 printf("xpt%d: can't do nonblocking access\n", unit); 919 return(ENODEV); 920 } 921 922 /* 923 * We only have one transport layer right now. If someone accesses 924 * us via something other than minor number 1, point out their 925 * mistake. 926 */ 927 if (unit != 0) { 928 printf("xptopen: got invalid xpt unit %d\n", unit); 929 return(ENXIO); 930 } 931 932 /* Mark ourselves open */ 933 xsoftc.flags |= XPT_FLAG_OPEN; 934 935 return(0); 936 } 937 938 static int 939 xptclose(dev_t dev, int flag, int fmt, struct thread *td) 940 { 941 int unit; 942 943 unit = minor(dev) & 0xff; 944 945 /* 946 * We only have one transport layer right now. If someone accesses 947 * us via something other than minor number 1, point out their 948 * mistake. 949 */ 950 if (unit != 0) { 951 printf("xptclose: got invalid xpt unit %d\n", unit); 952 return(ENXIO); 953 } 954 955 /* Mark ourselves closed */ 956 xsoftc.flags &= ~XPT_FLAG_OPEN; 957 958 return(0); 959 } 960 961 static int 962 xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 963 { 964 int unit, error; 965 966 error = 0; 967 unit = minor(dev) & 0xff; 968 969 /* 970 * We only have one transport layer right now. If someone accesses 971 * us via something other than minor number 1, point out their 972 * mistake. 973 */ 974 if (unit != 0) { 975 printf("xptioctl: got invalid xpt unit %d\n", unit); 976 return(ENXIO); 977 } 978 979 switch(cmd) { 980 /* 981 * For the transport layer CAMIOCOMMAND ioctl, we really only want 982 * to accept CCB types that don't quite make sense to send through a 983 * passthrough driver. 984 */ 985 case CAMIOCOMMAND: { 986 union ccb *ccb; 987 union ccb *inccb; 988 989 inccb = (union ccb *)addr; 990 991 switch(inccb->ccb_h.func_code) { 992 case XPT_SCAN_BUS: 993 case XPT_RESET_BUS: 994 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 995 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 996 error = EINVAL; 997 break; 998 } 999 /* FALLTHROUGH */ 1000 case XPT_PATH_INQ: 1001 case XPT_ENG_INQ: 1002 case XPT_SCAN_LUN: 1003 1004 ccb = xpt_alloc_ccb(); 1005 1006 /* 1007 * Create a path using the bus, target, and lun the 1008 * user passed in. 1009 */ 1010 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1011 inccb->ccb_h.path_id, 1012 inccb->ccb_h.target_id, 1013 inccb->ccb_h.target_lun) != 1014 CAM_REQ_CMP){ 1015 error = EINVAL; 1016 xpt_free_ccb(ccb); 1017 break; 1018 } 1019 /* Ensure all of our fields are correct */ 1020 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1021 inccb->ccb_h.pinfo.priority); 1022 xpt_merge_ccb(ccb, inccb); 1023 ccb->ccb_h.cbfcnp = xptdone; 1024 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1025 bcopy(ccb, inccb, sizeof(union ccb)); 1026 xpt_free_path(ccb->ccb_h.path); 1027 xpt_free_ccb(ccb); 1028 break; 1029 1030 case XPT_DEBUG: { 1031 union ccb ccb; 1032 1033 /* 1034 * This is an immediate CCB, so it's okay to 1035 * allocate it on the stack. 1036 */ 1037 1038 /* 1039 * Create a path using the bus, target, and lun the 1040 * user passed in. 1041 */ 1042 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1043 inccb->ccb_h.path_id, 1044 inccb->ccb_h.target_id, 1045 inccb->ccb_h.target_lun) != 1046 CAM_REQ_CMP){ 1047 error = EINVAL; 1048 break; 1049 } 1050 /* Ensure all of our fields are correct */ 1051 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1052 inccb->ccb_h.pinfo.priority); 1053 xpt_merge_ccb(&ccb, inccb); 1054 ccb.ccb_h.cbfcnp = xptdone; 1055 xpt_action(&ccb); 1056 bcopy(&ccb, inccb, sizeof(union ccb)); 1057 xpt_free_path(ccb.ccb_h.path); 1058 break; 1059 1060 } 1061 case XPT_DEV_MATCH: { 1062 struct cam_periph_map_info mapinfo; 1063 struct cam_path *old_path; 1064 1065 /* 1066 * We can't deal with physical addresses for this 1067 * type of transaction. 1068 */ 1069 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1070 error = EINVAL; 1071 break; 1072 } 1073 1074 /* 1075 * Save this in case the caller had it set to 1076 * something in particular. 1077 */ 1078 old_path = inccb->ccb_h.path; 1079 1080 /* 1081 * We really don't need a path for the matching 1082 * code. The path is needed because of the 1083 * debugging statements in xpt_action(). They 1084 * assume that the CCB has a valid path. 1085 */ 1086 inccb->ccb_h.path = xpt_periph->path; 1087 1088 bzero(&mapinfo, sizeof(mapinfo)); 1089 1090 /* 1091 * Map the pattern and match buffers into kernel 1092 * virtual address space. 1093 */ 1094 error = cam_periph_mapmem(inccb, &mapinfo); 1095 1096 if (error) { 1097 inccb->ccb_h.path = old_path; 1098 break; 1099 } 1100 1101 /* 1102 * This is an immediate CCB, we can send it on directly. 1103 */ 1104 xpt_action(inccb); 1105 1106 /* 1107 * Map the buffers back into user space. 1108 */ 1109 cam_periph_unmapmem(inccb, &mapinfo); 1110 1111 inccb->ccb_h.path = old_path; 1112 1113 error = 0; 1114 break; 1115 } 1116 default: 1117 error = ENOTSUP; 1118 break; 1119 } 1120 break; 1121 } 1122 /* 1123 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1124 * with the periphal driver name and unit name filled in. The other 1125 * fields don't really matter as input. The passthrough driver name 1126 * ("pass"), and unit number are passed back in the ccb. The current 1127 * device generation number, and the index into the device peripheral 1128 * driver list, and the status are also passed back. Note that 1129 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1130 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1131 * (or rather should be) impossible for the device peripheral driver 1132 * list to change since we look at the whole thing in one pass, and 1133 * we do it with splcam protection. 1134 * 1135 */ 1136 case CAMGETPASSTHRU: { 1137 union ccb *ccb; 1138 struct cam_periph *periph; 1139 struct periph_driver **p_drv; 1140 char *name; 1141 int unit; 1142 int cur_generation; 1143 int base_periph_found; 1144 int splbreaknum; 1145 int s; 1146 1147 ccb = (union ccb *)addr; 1148 unit = ccb->cgdl.unit_number; 1149 name = ccb->cgdl.periph_name; 1150 /* 1151 * Every 100 devices, we want to drop our spl protection to 1152 * give the software interrupt handler a chance to run. 1153 * Most systems won't run into this check, but this should 1154 * avoid starvation in the software interrupt handler in 1155 * large systems. 1156 */ 1157 splbreaknum = 100; 1158 1159 ccb = (union ccb *)addr; 1160 1161 base_periph_found = 0; 1162 1163 /* 1164 * Sanity check -- make sure we don't get a null peripheral 1165 * driver name. 1166 */ 1167 if (*ccb->cgdl.periph_name == '\0') { 1168 error = EINVAL; 1169 break; 1170 } 1171 1172 /* Keep the list from changing while we traverse it */ 1173 s = splcam(); 1174 ptstartover: 1175 cur_generation = xsoftc.generation; 1176 1177 /* first find our driver in the list of drivers */ 1178 SET_FOREACH(p_drv, periphdriver_set) { 1179 if (strcmp((*p_drv)->driver_name, name) == 0) 1180 break; 1181 } 1182 1183 if (*p_drv == NULL) { 1184 splx(s); 1185 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1186 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1187 *ccb->cgdl.periph_name = '\0'; 1188 ccb->cgdl.unit_number = 0; 1189 error = ENOENT; 1190 break; 1191 } 1192 1193 /* 1194 * Run through every peripheral instance of this driver 1195 * and check to see whether it matches the unit passed 1196 * in by the user. If it does, get out of the loops and 1197 * find the passthrough driver associated with that 1198 * peripheral driver. 1199 */ 1200 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 1201 periph = TAILQ_NEXT(periph, unit_links)) { 1202 1203 if (periph->unit_number == unit) { 1204 break; 1205 } else if (--splbreaknum == 0) { 1206 splx(s); 1207 s = splcam(); 1208 splbreaknum = 100; 1209 if (cur_generation != xsoftc.generation) 1210 goto ptstartover; 1211 } 1212 } 1213 /* 1214 * If we found the peripheral driver that the user passed 1215 * in, go through all of the peripheral drivers for that 1216 * particular device and look for a passthrough driver. 1217 */ 1218 if (periph != NULL) { 1219 struct cam_ed *device; 1220 int i; 1221 1222 base_periph_found = 1; 1223 device = periph->path->device; 1224 for (i = 0, periph = device->periphs.slh_first; 1225 periph != NULL; 1226 periph = periph->periph_links.sle_next, i++) { 1227 /* 1228 * Check to see whether we have a 1229 * passthrough device or not. 1230 */ 1231 if (strcmp(periph->periph_name, "pass") == 0) { 1232 /* 1233 * Fill in the getdevlist fields. 1234 */ 1235 strcpy(ccb->cgdl.periph_name, 1236 periph->periph_name); 1237 ccb->cgdl.unit_number = 1238 periph->unit_number; 1239 if (periph->periph_links.sle_next) 1240 ccb->cgdl.status = 1241 CAM_GDEVLIST_MORE_DEVS; 1242 else 1243 ccb->cgdl.status = 1244 CAM_GDEVLIST_LAST_DEVICE; 1245 ccb->cgdl.generation = 1246 device->generation; 1247 ccb->cgdl.index = i; 1248 /* 1249 * Fill in some CCB header fields 1250 * that the user may want. 1251 */ 1252 ccb->ccb_h.path_id = 1253 periph->path->bus->path_id; 1254 ccb->ccb_h.target_id = 1255 periph->path->target->target_id; 1256 ccb->ccb_h.target_lun = 1257 periph->path->device->lun_id; 1258 ccb->ccb_h.status = CAM_REQ_CMP; 1259 break; 1260 } 1261 } 1262 } 1263 1264 /* 1265 * If the periph is null here, one of two things has 1266 * happened. The first possibility is that we couldn't 1267 * find the unit number of the particular peripheral driver 1268 * that the user is asking about. e.g. the user asks for 1269 * the passthrough driver for "da11". We find the list of 1270 * "da" peripherals all right, but there is no unit 11. 1271 * The other possibility is that we went through the list 1272 * of peripheral drivers attached to the device structure, 1273 * but didn't find one with the name "pass". Either way, 1274 * we return ENOENT, since we couldn't find something. 1275 */ 1276 if (periph == NULL) { 1277 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1278 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1279 *ccb->cgdl.periph_name = '\0'; 1280 ccb->cgdl.unit_number = 0; 1281 error = ENOENT; 1282 /* 1283 * It is unfortunate that this is even necessary, 1284 * but there are many, many clueless users out there. 1285 * If this is true, the user is looking for the 1286 * passthrough driver, but doesn't have one in his 1287 * kernel. 1288 */ 1289 if (base_periph_found == 1) { 1290 printf("xptioctl: pass driver is not in the " 1291 "kernel\n"); 1292 printf("xptioctl: put \"device pass0\" in " 1293 "your kernel config file\n"); 1294 } 1295 } 1296 splx(s); 1297 break; 1298 } 1299 default: 1300 error = ENOTTY; 1301 break; 1302 } 1303 1304 return(error); 1305 } 1306 1307 /* Functions accessed by the peripheral drivers */ 1308 static void 1309 xpt_init(dummy) 1310 void *dummy; 1311 { 1312 struct cam_sim *xpt_sim; 1313 struct cam_path *path; 1314 struct cam_devq *devq; 1315 cam_status status; 1316 1317 TAILQ_INIT(&xpt_busses); 1318 TAILQ_INIT(&cam_bioq); 1319 TAILQ_INIT(&cam_netq); 1320 SLIST_INIT(&ccb_freeq); 1321 STAILQ_INIT(&highpowerq); 1322 1323 /* 1324 * The xpt layer is, itself, the equivelent of a SIM. 1325 * Allow 16 ccbs in the ccb pool for it. This should 1326 * give decent parallelism when we probe busses and 1327 * perform other XPT functions. 1328 */ 1329 devq = cam_simq_alloc(16); 1330 xpt_sim = cam_sim_alloc(xptaction, 1331 xptpoll, 1332 "xpt", 1333 /*softc*/NULL, 1334 /*unit*/0, 1335 /*max_dev_transactions*/0, 1336 /*max_tagged_dev_transactions*/0, 1337 devq); 1338 cam_simq_release(devq); 1339 xpt_max_ccbs = 16; 1340 1341 xpt_bus_register(xpt_sim, /*bus #*/0); 1342 1343 /* 1344 * Looking at the XPT from the SIM layer, the XPT is 1345 * the equivelent of a peripheral driver. Allocate 1346 * a peripheral driver entry for us. 1347 */ 1348 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1349 CAM_TARGET_WILDCARD, 1350 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1351 printf("xpt_init: xpt_create_path failed with status %#x," 1352 " failing attach\n", status); 1353 return; 1354 } 1355 1356 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1357 path, NULL, 0, NULL); 1358 xpt_free_path(path); 1359 1360 xpt_sim->softc = xpt_periph; 1361 1362 /* 1363 * Register a callback for when interrupts are enabled. 1364 */ 1365 xpt_config_hook = malloc(sizeof(struct intr_config_hook), 1366 M_TEMP, M_INTWAIT | M_ZERO); 1367 xpt_config_hook->ich_func = xpt_config; 1368 if (config_intrhook_establish(xpt_config_hook) != 0) { 1369 free (xpt_config_hook, M_TEMP); 1370 printf("xpt_init: config_intrhook_establish failed " 1371 "- failing attach\n"); 1372 } 1373 1374 /* Install our software interrupt handlers */ 1375 register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet"); 1376 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio"); 1377 } 1378 1379 static cam_status 1380 xptregister(struct cam_periph *periph, void *arg) 1381 { 1382 if (periph == NULL) { 1383 printf("xptregister: periph was NULL!!\n"); 1384 return(CAM_REQ_CMP_ERR); 1385 } 1386 1387 periph->softc = NULL; 1388 1389 xpt_periph = periph; 1390 1391 return(CAM_REQ_CMP); 1392 } 1393 1394 int32_t 1395 xpt_add_periph(struct cam_periph *periph) 1396 { 1397 struct cam_ed *device; 1398 int32_t status; 1399 struct periph_list *periph_head; 1400 1401 device = periph->path->device; 1402 1403 periph_head = &device->periphs; 1404 1405 status = CAM_REQ_CMP; 1406 1407 if (device != NULL) { 1408 int s; 1409 1410 /* 1411 * Make room for this peripheral 1412 * so it will fit in the queue 1413 * when it's scheduled to run 1414 */ 1415 s = splsoftcam(); 1416 status = camq_resize(&device->drvq, 1417 device->drvq.array_size + 1); 1418 1419 device->generation++; 1420 1421 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1422 1423 splx(s); 1424 } 1425 1426 xsoftc.generation++; 1427 1428 return (status); 1429 } 1430 1431 void 1432 xpt_remove_periph(struct cam_periph *periph) 1433 { 1434 struct cam_ed *device; 1435 1436 device = periph->path->device; 1437 1438 if (device != NULL) { 1439 int s; 1440 struct periph_list *periph_head; 1441 1442 periph_head = &device->periphs; 1443 1444 /* Release the slot for this peripheral */ 1445 s = splsoftcam(); 1446 camq_resize(&device->drvq, device->drvq.array_size - 1); 1447 1448 device->generation++; 1449 1450 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1451 1452 splx(s); 1453 } 1454 1455 xsoftc.generation++; 1456 1457 } 1458 1459 void 1460 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1461 { 1462 int s; 1463 u_int mb; 1464 struct cam_path *path; 1465 struct ccb_trans_settings cts; 1466 1467 path = periph->path; 1468 /* 1469 * To ensure that this is printed in one piece, 1470 * mask out CAM interrupts. 1471 */ 1472 s = splsoftcam(); 1473 printf("%s%d at %s%d bus %d target %d lun %d\n", 1474 periph->periph_name, periph->unit_number, 1475 path->bus->sim->sim_name, 1476 path->bus->sim->unit_number, 1477 path->bus->sim->bus_id, 1478 path->target->target_id, 1479 path->device->lun_id); 1480 printf("%s%d: ", periph->periph_name, periph->unit_number); 1481 scsi_print_inquiry(&path->device->inq_data); 1482 if ((bootverbose) 1483 && (path->device->serial_num_len > 0)) { 1484 /* Don't wrap the screen - print only the first 60 chars */ 1485 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1486 periph->unit_number, path->device->serial_num); 1487 } 1488 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1489 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1490 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1491 xpt_action((union ccb*)&cts); 1492 if (cts.ccb_h.status == CAM_REQ_CMP) { 1493 u_int speed; 1494 u_int freq; 1495 1496 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1497 && cts.sync_offset != 0) { 1498 freq = scsi_calc_syncsrate(cts.sync_period); 1499 speed = freq; 1500 } else { 1501 struct ccb_pathinq cpi; 1502 1503 /* Ask the SIM for its base transfer speed */ 1504 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1505 cpi.ccb_h.func_code = XPT_PATH_INQ; 1506 xpt_action((union ccb *)&cpi); 1507 1508 speed = cpi.base_transfer_speed; 1509 freq = 0; 1510 } 1511 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1512 speed *= (0x01 << cts.bus_width); 1513 mb = speed / 1000; 1514 if (mb > 0) 1515 printf("%s%d: %d.%03dMB/s transfers", 1516 periph->periph_name, periph->unit_number, 1517 mb, speed % 1000); 1518 else 1519 printf("%s%d: %dKB/s transfers", periph->periph_name, 1520 periph->unit_number, speed); 1521 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1522 && cts.sync_offset != 0) { 1523 printf(" (%d.%03dMHz, offset %d", freq / 1000, 1524 freq % 1000, cts.sync_offset); 1525 } 1526 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1527 && cts.bus_width > 0) { 1528 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1529 && cts.sync_offset != 0) { 1530 printf(", "); 1531 } else { 1532 printf(" ("); 1533 } 1534 printf("%dbit)", 8 * (0x01 << cts.bus_width)); 1535 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1536 && cts.sync_offset != 0) { 1537 printf(")"); 1538 } 1539 1540 if (path->device->inq_flags & SID_CmdQue 1541 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1542 printf(", Tagged Queueing Enabled"); 1543 } 1544 1545 printf("\n"); 1546 } else if (path->device->inq_flags & SID_CmdQue 1547 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1548 printf("%s%d: Tagged Queueing Enabled\n", 1549 periph->periph_name, periph->unit_number); 1550 } 1551 1552 /* 1553 * We only want to print the caller's announce string if they've 1554 * passed one in.. 1555 */ 1556 if (announce_string != NULL) 1557 printf("%s%d: %s\n", periph->periph_name, 1558 periph->unit_number, announce_string); 1559 splx(s); 1560 } 1561 1562 1563 static dev_match_ret 1564 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns, 1565 struct cam_eb *bus) 1566 { 1567 dev_match_ret retval; 1568 int i; 1569 1570 retval = DM_RET_NONE; 1571 1572 /* 1573 * If we aren't given something to match against, that's an error. 1574 */ 1575 if (bus == NULL) 1576 return(DM_RET_ERROR); 1577 1578 /* 1579 * If there are no match entries, then this bus matches no 1580 * matter what. 1581 */ 1582 if ((patterns == NULL) || (num_patterns == 0)) 1583 return(DM_RET_DESCEND | DM_RET_COPY); 1584 1585 for (i = 0; i < num_patterns; i++) { 1586 struct bus_match_pattern *cur_pattern; 1587 1588 /* 1589 * If the pattern in question isn't for a bus node, we 1590 * aren't interested. However, we do indicate to the 1591 * calling routine that we should continue descending the 1592 * tree, since the user wants to match against lower-level 1593 * EDT elements. 1594 */ 1595 if (patterns[i].type != DEV_MATCH_BUS) { 1596 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1597 retval |= DM_RET_DESCEND; 1598 continue; 1599 } 1600 1601 cur_pattern = &patterns[i].pattern.bus_pattern; 1602 1603 /* 1604 * If they want to match any bus node, we give them any 1605 * device node. 1606 */ 1607 if (cur_pattern->flags == BUS_MATCH_ANY) { 1608 /* set the copy flag */ 1609 retval |= DM_RET_COPY; 1610 1611 /* 1612 * If we've already decided on an action, go ahead 1613 * and return. 1614 */ 1615 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1616 return(retval); 1617 } 1618 1619 /* 1620 * Not sure why someone would do this... 1621 */ 1622 if (cur_pattern->flags == BUS_MATCH_NONE) 1623 continue; 1624 1625 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1626 && (cur_pattern->path_id != bus->path_id)) 1627 continue; 1628 1629 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1630 && (cur_pattern->bus_id != bus->sim->bus_id)) 1631 continue; 1632 1633 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1634 && (cur_pattern->unit_number != bus->sim->unit_number)) 1635 continue; 1636 1637 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1638 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1639 DEV_IDLEN) != 0)) 1640 continue; 1641 1642 /* 1643 * If we get to this point, the user definitely wants 1644 * information on this bus. So tell the caller to copy the 1645 * data out. 1646 */ 1647 retval |= DM_RET_COPY; 1648 1649 /* 1650 * If the return action has been set to descend, then we 1651 * know that we've already seen a non-bus matching 1652 * expression, therefore we need to further descend the tree. 1653 * This won't change by continuing around the loop, so we 1654 * go ahead and return. If we haven't seen a non-bus 1655 * matching expression, we keep going around the loop until 1656 * we exhaust the matching expressions. We'll set the stop 1657 * flag once we fall out of the loop. 1658 */ 1659 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1660 return(retval); 1661 } 1662 1663 /* 1664 * If the return action hasn't been set to descend yet, that means 1665 * we haven't seen anything other than bus matching patterns. So 1666 * tell the caller to stop descending the tree -- the user doesn't 1667 * want to match against lower level tree elements. 1668 */ 1669 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1670 retval |= DM_RET_STOP; 1671 1672 return(retval); 1673 } 1674 1675 static dev_match_ret 1676 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns, 1677 struct cam_ed *device) 1678 { 1679 dev_match_ret retval; 1680 int i; 1681 1682 retval = DM_RET_NONE; 1683 1684 /* 1685 * If we aren't given something to match against, that's an error. 1686 */ 1687 if (device == NULL) 1688 return(DM_RET_ERROR); 1689 1690 /* 1691 * If there are no match entries, then this device matches no 1692 * matter what. 1693 */ 1694 if ((patterns == NULL) || (patterns == 0)) 1695 return(DM_RET_DESCEND | DM_RET_COPY); 1696 1697 for (i = 0; i < num_patterns; i++) { 1698 struct device_match_pattern *cur_pattern; 1699 1700 /* 1701 * If the pattern in question isn't for a device node, we 1702 * aren't interested. 1703 */ 1704 if (patterns[i].type != DEV_MATCH_DEVICE) { 1705 if ((patterns[i].type == DEV_MATCH_PERIPH) 1706 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1707 retval |= DM_RET_DESCEND; 1708 continue; 1709 } 1710 1711 cur_pattern = &patterns[i].pattern.device_pattern; 1712 1713 /* 1714 * If they want to match any device node, we give them any 1715 * device node. 1716 */ 1717 if (cur_pattern->flags == DEV_MATCH_ANY) { 1718 /* set the copy flag */ 1719 retval |= DM_RET_COPY; 1720 1721 1722 /* 1723 * If we've already decided on an action, go ahead 1724 * and return. 1725 */ 1726 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1727 return(retval); 1728 } 1729 1730 /* 1731 * Not sure why someone would do this... 1732 */ 1733 if (cur_pattern->flags == DEV_MATCH_NONE) 1734 continue; 1735 1736 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1737 && (cur_pattern->path_id != device->target->bus->path_id)) 1738 continue; 1739 1740 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1741 && (cur_pattern->target_id != device->target->target_id)) 1742 continue; 1743 1744 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1745 && (cur_pattern->target_lun != device->lun_id)) 1746 continue; 1747 1748 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1749 && (cam_quirkmatch((caddr_t)&device->inq_data, 1750 (caddr_t)&cur_pattern->inq_pat, 1751 1, sizeof(cur_pattern->inq_pat), 1752 scsi_static_inquiry_match) == NULL)) 1753 continue; 1754 1755 /* 1756 * If we get to this point, the user definitely wants 1757 * information on this device. So tell the caller to copy 1758 * the data out. 1759 */ 1760 retval |= DM_RET_COPY; 1761 1762 /* 1763 * If the return action has been set to descend, then we 1764 * know that we've already seen a peripheral matching 1765 * expression, therefore we need to further descend the tree. 1766 * This won't change by continuing around the loop, so we 1767 * go ahead and return. If we haven't seen a peripheral 1768 * matching expression, we keep going around the loop until 1769 * we exhaust the matching expressions. We'll set the stop 1770 * flag once we fall out of the loop. 1771 */ 1772 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1773 return(retval); 1774 } 1775 1776 /* 1777 * If the return action hasn't been set to descend yet, that means 1778 * we haven't seen any peripheral matching patterns. So tell the 1779 * caller to stop descending the tree -- the user doesn't want to 1780 * match against lower level tree elements. 1781 */ 1782 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1783 retval |= DM_RET_STOP; 1784 1785 return(retval); 1786 } 1787 1788 /* 1789 * Match a single peripheral against any number of match patterns. 1790 */ 1791 static dev_match_ret 1792 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns, 1793 struct cam_periph *periph) 1794 { 1795 dev_match_ret retval; 1796 int i; 1797 1798 /* 1799 * If we aren't given something to match against, that's an error. 1800 */ 1801 if (periph == NULL) 1802 return(DM_RET_ERROR); 1803 1804 /* 1805 * If there are no match entries, then this peripheral matches no 1806 * matter what. 1807 */ 1808 if ((patterns == NULL) || (num_patterns == 0)) 1809 return(DM_RET_STOP | DM_RET_COPY); 1810 1811 /* 1812 * There aren't any nodes below a peripheral node, so there's no 1813 * reason to descend the tree any further. 1814 */ 1815 retval = DM_RET_STOP; 1816 1817 for (i = 0; i < num_patterns; i++) { 1818 struct periph_match_pattern *cur_pattern; 1819 1820 /* 1821 * If the pattern in question isn't for a peripheral, we 1822 * aren't interested. 1823 */ 1824 if (patterns[i].type != DEV_MATCH_PERIPH) 1825 continue; 1826 1827 cur_pattern = &patterns[i].pattern.periph_pattern; 1828 1829 /* 1830 * If they want to match on anything, then we will do so. 1831 */ 1832 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1833 /* set the copy flag */ 1834 retval |= DM_RET_COPY; 1835 1836 /* 1837 * We've already set the return action to stop, 1838 * since there are no nodes below peripherals in 1839 * the tree. 1840 */ 1841 return(retval); 1842 } 1843 1844 /* 1845 * Not sure why someone would do this... 1846 */ 1847 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1848 continue; 1849 1850 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1851 && (cur_pattern->path_id != periph->path->bus->path_id)) 1852 continue; 1853 1854 /* 1855 * For the target and lun id's, we have to make sure the 1856 * target and lun pointers aren't NULL. The xpt peripheral 1857 * has a wildcard target and device. 1858 */ 1859 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1860 && ((periph->path->target == NULL) 1861 ||(cur_pattern->target_id != periph->path->target->target_id))) 1862 continue; 1863 1864 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1865 && ((periph->path->device == NULL) 1866 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1867 continue; 1868 1869 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1870 && (cur_pattern->unit_number != periph->unit_number)) 1871 continue; 1872 1873 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1874 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1875 DEV_IDLEN) != 0)) 1876 continue; 1877 1878 /* 1879 * If we get to this point, the user definitely wants 1880 * information on this peripheral. So tell the caller to 1881 * copy the data out. 1882 */ 1883 retval |= DM_RET_COPY; 1884 1885 /* 1886 * The return action has already been set to stop, since 1887 * peripherals don't have any nodes below them in the EDT. 1888 */ 1889 return(retval); 1890 } 1891 1892 /* 1893 * If we get to this point, the peripheral that was passed in 1894 * doesn't match any of the patterns. 1895 */ 1896 return(retval); 1897 } 1898 1899 static int 1900 xptedtbusfunc(struct cam_eb *bus, void *arg) 1901 { 1902 struct ccb_dev_match *cdm; 1903 dev_match_ret retval; 1904 1905 cdm = (struct ccb_dev_match *)arg; 1906 1907 /* 1908 * If our position is for something deeper in the tree, that means 1909 * that we've already seen this node. So, we keep going down. 1910 */ 1911 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1912 && (cdm->pos.cookie.bus == bus) 1913 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1914 && (cdm->pos.cookie.target != NULL)) 1915 retval = DM_RET_DESCEND; 1916 else 1917 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1918 1919 /* 1920 * If we got an error, bail out of the search. 1921 */ 1922 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1923 cdm->status = CAM_DEV_MATCH_ERROR; 1924 return(0); 1925 } 1926 1927 /* 1928 * If the copy flag is set, copy this bus out. 1929 */ 1930 if (retval & DM_RET_COPY) { 1931 int spaceleft, j; 1932 1933 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1934 sizeof(struct dev_match_result)); 1935 1936 /* 1937 * If we don't have enough space to put in another 1938 * match result, save our position and tell the 1939 * user there are more devices to check. 1940 */ 1941 if (spaceleft < sizeof(struct dev_match_result)) { 1942 bzero(&cdm->pos, sizeof(cdm->pos)); 1943 cdm->pos.position_type = 1944 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1945 1946 cdm->pos.cookie.bus = bus; 1947 cdm->pos.generations[CAM_BUS_GENERATION]= 1948 bus_generation; 1949 cdm->status = CAM_DEV_MATCH_MORE; 1950 return(0); 1951 } 1952 j = cdm->num_matches; 1953 cdm->num_matches++; 1954 cdm->matches[j].type = DEV_MATCH_BUS; 1955 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1956 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1957 cdm->matches[j].result.bus_result.unit_number = 1958 bus->sim->unit_number; 1959 strncpy(cdm->matches[j].result.bus_result.dev_name, 1960 bus->sim->sim_name, DEV_IDLEN); 1961 } 1962 1963 /* 1964 * If the user is only interested in busses, there's no 1965 * reason to descend to the next level in the tree. 1966 */ 1967 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1968 return(1); 1969 1970 /* 1971 * If there is a target generation recorded, check it to 1972 * make sure the target list hasn't changed. 1973 */ 1974 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1975 && (bus == cdm->pos.cookie.bus) 1976 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1977 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1978 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1979 bus->generation)) { 1980 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1981 return(0); 1982 } 1983 1984 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1985 && (cdm->pos.cookie.bus == bus) 1986 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1987 && (cdm->pos.cookie.target != NULL)) 1988 return(xpttargettraverse(bus, 1989 (struct cam_et *)cdm->pos.cookie.target, 1990 xptedttargetfunc, arg)); 1991 else 1992 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1993 } 1994 1995 static int 1996 xptedttargetfunc(struct cam_et *target, void *arg) 1997 { 1998 struct ccb_dev_match *cdm; 1999 2000 cdm = (struct ccb_dev_match *)arg; 2001 2002 /* 2003 * If there is a device list generation recorded, check it to 2004 * make sure the device list hasn't changed. 2005 */ 2006 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2007 && (cdm->pos.cookie.bus == target->bus) 2008 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2009 && (cdm->pos.cookie.target == target) 2010 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2011 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2012 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2013 target->generation)) { 2014 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2015 return(0); 2016 } 2017 2018 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2019 && (cdm->pos.cookie.bus == target->bus) 2020 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2021 && (cdm->pos.cookie.target == target) 2022 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2023 && (cdm->pos.cookie.device != NULL)) 2024 return(xptdevicetraverse(target, 2025 (struct cam_ed *)cdm->pos.cookie.device, 2026 xptedtdevicefunc, arg)); 2027 else 2028 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2029 } 2030 2031 static int 2032 xptedtdevicefunc(struct cam_ed *device, void *arg) 2033 { 2034 2035 struct ccb_dev_match *cdm; 2036 dev_match_ret retval; 2037 2038 cdm = (struct ccb_dev_match *)arg; 2039 2040 /* 2041 * If our position is for something deeper in the tree, that means 2042 * that we've already seen this node. So, we keep going down. 2043 */ 2044 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2045 && (cdm->pos.cookie.device == device) 2046 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2047 && (cdm->pos.cookie.periph != NULL)) 2048 retval = DM_RET_DESCEND; 2049 else 2050 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2051 device); 2052 2053 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2054 cdm->status = CAM_DEV_MATCH_ERROR; 2055 return(0); 2056 } 2057 2058 /* 2059 * If the copy flag is set, copy this device out. 2060 */ 2061 if (retval & DM_RET_COPY) { 2062 int spaceleft, j; 2063 2064 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2065 sizeof(struct dev_match_result)); 2066 2067 /* 2068 * If we don't have enough space to put in another 2069 * match result, save our position and tell the 2070 * user there are more devices to check. 2071 */ 2072 if (spaceleft < sizeof(struct dev_match_result)) { 2073 bzero(&cdm->pos, sizeof(cdm->pos)); 2074 cdm->pos.position_type = 2075 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2076 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2077 2078 cdm->pos.cookie.bus = device->target->bus; 2079 cdm->pos.generations[CAM_BUS_GENERATION]= 2080 bus_generation; 2081 cdm->pos.cookie.target = device->target; 2082 cdm->pos.generations[CAM_TARGET_GENERATION] = 2083 device->target->bus->generation; 2084 cdm->pos.cookie.device = device; 2085 cdm->pos.generations[CAM_DEV_GENERATION] = 2086 device->target->generation; 2087 cdm->status = CAM_DEV_MATCH_MORE; 2088 return(0); 2089 } 2090 j = cdm->num_matches; 2091 cdm->num_matches++; 2092 cdm->matches[j].type = DEV_MATCH_DEVICE; 2093 cdm->matches[j].result.device_result.path_id = 2094 device->target->bus->path_id; 2095 cdm->matches[j].result.device_result.target_id = 2096 device->target->target_id; 2097 cdm->matches[j].result.device_result.target_lun = 2098 device->lun_id; 2099 bcopy(&device->inq_data, 2100 &cdm->matches[j].result.device_result.inq_data, 2101 sizeof(struct scsi_inquiry_data)); 2102 2103 /* Let the user know whether this device is unconfigured */ 2104 if (device->flags & CAM_DEV_UNCONFIGURED) 2105 cdm->matches[j].result.device_result.flags = 2106 DEV_RESULT_UNCONFIGURED; 2107 else 2108 cdm->matches[j].result.device_result.flags = 2109 DEV_RESULT_NOFLAG; 2110 } 2111 2112 /* 2113 * If the user isn't interested in peripherals, don't descend 2114 * the tree any further. 2115 */ 2116 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2117 return(1); 2118 2119 /* 2120 * If there is a peripheral list generation recorded, make sure 2121 * it hasn't changed. 2122 */ 2123 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2124 && (device->target->bus == cdm->pos.cookie.bus) 2125 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2126 && (device->target == cdm->pos.cookie.target) 2127 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2128 && (device == cdm->pos.cookie.device) 2129 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2130 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2131 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2132 device->generation)){ 2133 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2134 return(0); 2135 } 2136 2137 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2138 && (cdm->pos.cookie.bus == device->target->bus) 2139 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2140 && (cdm->pos.cookie.target == device->target) 2141 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2142 && (cdm->pos.cookie.device == device) 2143 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2144 && (cdm->pos.cookie.periph != NULL)) 2145 return(xptperiphtraverse(device, 2146 (struct cam_periph *)cdm->pos.cookie.periph, 2147 xptedtperiphfunc, arg)); 2148 else 2149 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2150 } 2151 2152 static int 2153 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2154 { 2155 struct ccb_dev_match *cdm; 2156 dev_match_ret retval; 2157 2158 cdm = (struct ccb_dev_match *)arg; 2159 2160 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2161 2162 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2163 cdm->status = CAM_DEV_MATCH_ERROR; 2164 return(0); 2165 } 2166 2167 /* 2168 * If the copy flag is set, copy this peripheral out. 2169 */ 2170 if (retval & DM_RET_COPY) { 2171 int spaceleft, j; 2172 2173 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2174 sizeof(struct dev_match_result)); 2175 2176 /* 2177 * If we don't have enough space to put in another 2178 * match result, save our position and tell the 2179 * user there are more devices to check. 2180 */ 2181 if (spaceleft < sizeof(struct dev_match_result)) { 2182 bzero(&cdm->pos, sizeof(cdm->pos)); 2183 cdm->pos.position_type = 2184 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2185 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2186 CAM_DEV_POS_PERIPH; 2187 2188 cdm->pos.cookie.bus = periph->path->bus; 2189 cdm->pos.generations[CAM_BUS_GENERATION]= 2190 bus_generation; 2191 cdm->pos.cookie.target = periph->path->target; 2192 cdm->pos.generations[CAM_TARGET_GENERATION] = 2193 periph->path->bus->generation; 2194 cdm->pos.cookie.device = periph->path->device; 2195 cdm->pos.generations[CAM_DEV_GENERATION] = 2196 periph->path->target->generation; 2197 cdm->pos.cookie.periph = periph; 2198 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2199 periph->path->device->generation; 2200 cdm->status = CAM_DEV_MATCH_MORE; 2201 return(0); 2202 } 2203 2204 j = cdm->num_matches; 2205 cdm->num_matches++; 2206 cdm->matches[j].type = DEV_MATCH_PERIPH; 2207 cdm->matches[j].result.periph_result.path_id = 2208 periph->path->bus->path_id; 2209 cdm->matches[j].result.periph_result.target_id = 2210 periph->path->target->target_id; 2211 cdm->matches[j].result.periph_result.target_lun = 2212 periph->path->device->lun_id; 2213 cdm->matches[j].result.periph_result.unit_number = 2214 periph->unit_number; 2215 strncpy(cdm->matches[j].result.periph_result.periph_name, 2216 periph->periph_name, DEV_IDLEN); 2217 } 2218 2219 return(1); 2220 } 2221 2222 static int 2223 xptedtmatch(struct ccb_dev_match *cdm) 2224 { 2225 int ret; 2226 2227 cdm->num_matches = 0; 2228 2229 /* 2230 * Check the bus list generation. If it has changed, the user 2231 * needs to reset everything and start over. 2232 */ 2233 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2234 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2235 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2236 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2237 return(0); 2238 } 2239 2240 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2241 && (cdm->pos.cookie.bus != NULL)) 2242 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2243 xptedtbusfunc, cdm); 2244 else 2245 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2246 2247 /* 2248 * If we get back 0, that means that we had to stop before fully 2249 * traversing the EDT. It also means that one of the subroutines 2250 * has set the status field to the proper value. If we get back 1, 2251 * we've fully traversed the EDT and copied out any matching entries. 2252 */ 2253 if (ret == 1) 2254 cdm->status = CAM_DEV_MATCH_LAST; 2255 2256 return(ret); 2257 } 2258 2259 static int 2260 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2261 { 2262 struct ccb_dev_match *cdm; 2263 2264 cdm = (struct ccb_dev_match *)arg; 2265 2266 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2267 && (cdm->pos.cookie.pdrv == pdrv) 2268 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2269 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2270 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2271 (*pdrv)->generation)) { 2272 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2273 return(0); 2274 } 2275 2276 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2277 && (cdm->pos.cookie.pdrv == pdrv) 2278 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2279 && (cdm->pos.cookie.periph != NULL)) 2280 return(xptpdperiphtraverse(pdrv, 2281 (struct cam_periph *)cdm->pos.cookie.periph, 2282 xptplistperiphfunc, arg)); 2283 else 2284 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2285 } 2286 2287 static int 2288 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2289 { 2290 struct ccb_dev_match *cdm; 2291 dev_match_ret retval; 2292 2293 cdm = (struct ccb_dev_match *)arg; 2294 2295 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2296 2297 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2298 cdm->status = CAM_DEV_MATCH_ERROR; 2299 return(0); 2300 } 2301 2302 /* 2303 * If the copy flag is set, copy this peripheral out. 2304 */ 2305 if (retval & DM_RET_COPY) { 2306 int spaceleft, j; 2307 2308 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2309 sizeof(struct dev_match_result)); 2310 2311 /* 2312 * If we don't have enough space to put in another 2313 * match result, save our position and tell the 2314 * user there are more devices to check. 2315 */ 2316 if (spaceleft < sizeof(struct dev_match_result)) { 2317 struct periph_driver **pdrv; 2318 2319 pdrv = NULL; 2320 bzero(&cdm->pos, sizeof(cdm->pos)); 2321 cdm->pos.position_type = 2322 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2323 CAM_DEV_POS_PERIPH; 2324 2325 /* 2326 * This may look a bit non-sensical, but it is 2327 * actually quite logical. There are very few 2328 * peripheral drivers, and bloating every peripheral 2329 * structure with a pointer back to its parent 2330 * peripheral driver linker set entry would cost 2331 * more in the long run than doing this quick lookup. 2332 */ 2333 SET_FOREACH(pdrv, periphdriver_set) { 2334 if (strcmp((*pdrv)->driver_name, 2335 periph->periph_name) == 0) 2336 break; 2337 } 2338 2339 if (pdrv == NULL) { 2340 cdm->status = CAM_DEV_MATCH_ERROR; 2341 return(0); 2342 } 2343 2344 cdm->pos.cookie.pdrv = pdrv; 2345 /* 2346 * The periph generation slot does double duty, as 2347 * does the periph pointer slot. They are used for 2348 * both edt and pdrv lookups and positioning. 2349 */ 2350 cdm->pos.cookie.periph = periph; 2351 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2352 (*pdrv)->generation; 2353 cdm->status = CAM_DEV_MATCH_MORE; 2354 return(0); 2355 } 2356 2357 j = cdm->num_matches; 2358 cdm->num_matches++; 2359 cdm->matches[j].type = DEV_MATCH_PERIPH; 2360 cdm->matches[j].result.periph_result.path_id = 2361 periph->path->bus->path_id; 2362 2363 /* 2364 * The transport layer peripheral doesn't have a target or 2365 * lun. 2366 */ 2367 if (periph->path->target) 2368 cdm->matches[j].result.periph_result.target_id = 2369 periph->path->target->target_id; 2370 else 2371 cdm->matches[j].result.periph_result.target_id = -1; 2372 2373 if (periph->path->device) 2374 cdm->matches[j].result.periph_result.target_lun = 2375 periph->path->device->lun_id; 2376 else 2377 cdm->matches[j].result.periph_result.target_lun = -1; 2378 2379 cdm->matches[j].result.periph_result.unit_number = 2380 periph->unit_number; 2381 strncpy(cdm->matches[j].result.periph_result.periph_name, 2382 periph->periph_name, DEV_IDLEN); 2383 } 2384 2385 return(1); 2386 } 2387 2388 static int 2389 xptperiphlistmatch(struct ccb_dev_match *cdm) 2390 { 2391 int ret; 2392 2393 cdm->num_matches = 0; 2394 2395 /* 2396 * At this point in the edt traversal function, we check the bus 2397 * list generation to make sure that no busses have been added or 2398 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2399 * For the peripheral driver list traversal function, however, we 2400 * don't have to worry about new peripheral driver types coming or 2401 * going; they're in a linker set, and therefore can't change 2402 * without a recompile. 2403 */ 2404 2405 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2406 && (cdm->pos.cookie.pdrv != NULL)) 2407 ret = xptpdrvtraverse( 2408 (struct periph_driver **)cdm->pos.cookie.pdrv, 2409 xptplistpdrvfunc, cdm); 2410 else 2411 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2412 2413 /* 2414 * If we get back 0, that means that we had to stop before fully 2415 * traversing the peripheral driver tree. It also means that one of 2416 * the subroutines has set the status field to the proper value. If 2417 * we get back 1, we've fully traversed the EDT and copied out any 2418 * matching entries. 2419 */ 2420 if (ret == 1) 2421 cdm->status = CAM_DEV_MATCH_LAST; 2422 2423 return(ret); 2424 } 2425 2426 static int 2427 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2428 { 2429 struct cam_eb *bus, *next_bus; 2430 int retval; 2431 2432 retval = 1; 2433 2434 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2435 bus != NULL; 2436 bus = next_bus) { 2437 next_bus = TAILQ_NEXT(bus, links); 2438 2439 retval = tr_func(bus, arg); 2440 if (retval == 0) 2441 return(retval); 2442 } 2443 2444 return(retval); 2445 } 2446 2447 static int 2448 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2449 xpt_targetfunc_t *tr_func, void *arg) 2450 { 2451 struct cam_et *target, *next_target; 2452 int retval; 2453 2454 retval = 1; 2455 for (target = (start_target ? start_target : 2456 TAILQ_FIRST(&bus->et_entries)); 2457 target != NULL; target = next_target) { 2458 2459 next_target = TAILQ_NEXT(target, links); 2460 2461 retval = tr_func(target, arg); 2462 2463 if (retval == 0) 2464 return(retval); 2465 } 2466 2467 return(retval); 2468 } 2469 2470 static int 2471 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2472 xpt_devicefunc_t *tr_func, void *arg) 2473 { 2474 struct cam_ed *device, *next_device; 2475 int retval; 2476 2477 retval = 1; 2478 for (device = (start_device ? start_device : 2479 TAILQ_FIRST(&target->ed_entries)); 2480 device != NULL; 2481 device = next_device) { 2482 2483 next_device = TAILQ_NEXT(device, links); 2484 2485 retval = tr_func(device, arg); 2486 2487 if (retval == 0) 2488 return(retval); 2489 } 2490 2491 return(retval); 2492 } 2493 2494 static int 2495 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2496 xpt_periphfunc_t *tr_func, void *arg) 2497 { 2498 struct cam_periph *periph, *next_periph; 2499 int retval; 2500 2501 retval = 1; 2502 2503 for (periph = (start_periph ? start_periph : 2504 SLIST_FIRST(&device->periphs)); 2505 periph != NULL; 2506 periph = next_periph) { 2507 2508 next_periph = SLIST_NEXT(periph, periph_links); 2509 2510 retval = tr_func(periph, arg); 2511 if (retval == 0) 2512 return(retval); 2513 } 2514 2515 return(retval); 2516 } 2517 2518 static int 2519 xptpdrvtraverse(struct periph_driver **start_pdrv, 2520 xpt_pdrvfunc_t *tr_func, void *arg) 2521 { 2522 struct periph_driver **pdrv; 2523 int retval; 2524 2525 retval = 1; 2526 2527 /* 2528 * We don't traverse the peripheral driver list like we do the 2529 * other lists, because it is a linker set, and therefore cannot be 2530 * changed during runtime. If the peripheral driver list is ever 2531 * re-done to be something other than a linker set (i.e. it can 2532 * change while the system is running), the list traversal should 2533 * be modified to work like the other traversal functions. 2534 */ 2535 SET_FOREACH(pdrv, periphdriver_set) { 2536 if (start_pdrv == NULL || start_pdrv == pdrv) { 2537 retval = tr_func(pdrv, arg); 2538 if (retval == 0) 2539 return(retval); 2540 start_pdrv = NULL; /* traverse remainder */ 2541 } 2542 } 2543 return(retval); 2544 } 2545 2546 static int 2547 xptpdperiphtraverse(struct periph_driver **pdrv, 2548 struct cam_periph *start_periph, 2549 xpt_periphfunc_t *tr_func, void *arg) 2550 { 2551 struct cam_periph *periph, *next_periph; 2552 int retval; 2553 2554 retval = 1; 2555 2556 for (periph = (start_periph ? start_periph : 2557 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2558 periph = next_periph) { 2559 2560 next_periph = TAILQ_NEXT(periph, unit_links); 2561 2562 retval = tr_func(periph, arg); 2563 if (retval == 0) 2564 return(retval); 2565 } 2566 return(retval); 2567 } 2568 2569 static int 2570 xptdefbusfunc(struct cam_eb *bus, void *arg) 2571 { 2572 struct xpt_traverse_config *tr_config; 2573 2574 tr_config = (struct xpt_traverse_config *)arg; 2575 2576 if (tr_config->depth == XPT_DEPTH_BUS) { 2577 xpt_busfunc_t *tr_func; 2578 2579 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2580 2581 return(tr_func(bus, tr_config->tr_arg)); 2582 } else 2583 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2584 } 2585 2586 static int 2587 xptdeftargetfunc(struct cam_et *target, void *arg) 2588 { 2589 struct xpt_traverse_config *tr_config; 2590 2591 tr_config = (struct xpt_traverse_config *)arg; 2592 2593 if (tr_config->depth == XPT_DEPTH_TARGET) { 2594 xpt_targetfunc_t *tr_func; 2595 2596 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2597 2598 return(tr_func(target, tr_config->tr_arg)); 2599 } else 2600 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2601 } 2602 2603 static int 2604 xptdefdevicefunc(struct cam_ed *device, void *arg) 2605 { 2606 struct xpt_traverse_config *tr_config; 2607 2608 tr_config = (struct xpt_traverse_config *)arg; 2609 2610 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2611 xpt_devicefunc_t *tr_func; 2612 2613 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2614 2615 return(tr_func(device, tr_config->tr_arg)); 2616 } else 2617 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2618 } 2619 2620 static int 2621 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2622 { 2623 struct xpt_traverse_config *tr_config; 2624 xpt_periphfunc_t *tr_func; 2625 2626 tr_config = (struct xpt_traverse_config *)arg; 2627 2628 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2629 2630 /* 2631 * Unlike the other default functions, we don't check for depth 2632 * here. The peripheral driver level is the last level in the EDT, 2633 * so if we're here, we should execute the function in question. 2634 */ 2635 return(tr_func(periph, tr_config->tr_arg)); 2636 } 2637 2638 /* 2639 * Execute the given function for every bus in the EDT. 2640 */ 2641 static int 2642 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2643 { 2644 struct xpt_traverse_config tr_config; 2645 2646 tr_config.depth = XPT_DEPTH_BUS; 2647 tr_config.tr_func = tr_func; 2648 tr_config.tr_arg = arg; 2649 2650 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2651 } 2652 2653 #ifdef notusedyet 2654 /* 2655 * Execute the given function for every target in the EDT. 2656 */ 2657 static int 2658 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2659 { 2660 struct xpt_traverse_config tr_config; 2661 2662 tr_config.depth = XPT_DEPTH_TARGET; 2663 tr_config.tr_func = tr_func; 2664 tr_config.tr_arg = arg; 2665 2666 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2667 } 2668 #endif /* notusedyet */ 2669 2670 /* 2671 * Execute the given function for every device in the EDT. 2672 */ 2673 static int 2674 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2675 { 2676 struct xpt_traverse_config tr_config; 2677 2678 tr_config.depth = XPT_DEPTH_DEVICE; 2679 tr_config.tr_func = tr_func; 2680 tr_config.tr_arg = arg; 2681 2682 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2683 } 2684 2685 #ifdef notusedyet 2686 /* 2687 * Execute the given function for every peripheral in the EDT. 2688 */ 2689 static int 2690 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2691 { 2692 struct xpt_traverse_config tr_config; 2693 2694 tr_config.depth = XPT_DEPTH_PERIPH; 2695 tr_config.tr_func = tr_func; 2696 tr_config.tr_arg = arg; 2697 2698 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2699 } 2700 #endif /* notusedyet */ 2701 2702 static int 2703 xptsetasyncfunc(struct cam_ed *device, void *arg) 2704 { 2705 struct cam_path path; 2706 struct ccb_getdev cgd; 2707 struct async_node *cur_entry; 2708 2709 cur_entry = (struct async_node *)arg; 2710 2711 /* 2712 * Don't report unconfigured devices (Wildcard devs, 2713 * devices only for target mode, device instances 2714 * that have been invalidated but are waiting for 2715 * their last reference count to be released). 2716 */ 2717 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2718 return (1); 2719 2720 xpt_compile_path(&path, 2721 NULL, 2722 device->target->bus->path_id, 2723 device->target->target_id, 2724 device->lun_id); 2725 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2726 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2727 xpt_action((union ccb *)&cgd); 2728 cur_entry->callback(cur_entry->callback_arg, 2729 AC_FOUND_DEVICE, 2730 &path, &cgd); 2731 xpt_release_path(&path); 2732 2733 return(1); 2734 } 2735 2736 static int 2737 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2738 { 2739 struct cam_path path; 2740 struct ccb_pathinq cpi; 2741 struct async_node *cur_entry; 2742 2743 cur_entry = (struct async_node *)arg; 2744 2745 xpt_compile_path(&path, /*periph*/NULL, 2746 bus->sim->path_id, 2747 CAM_TARGET_WILDCARD, 2748 CAM_LUN_WILDCARD); 2749 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2750 cpi.ccb_h.func_code = XPT_PATH_INQ; 2751 xpt_action((union ccb *)&cpi); 2752 cur_entry->callback(cur_entry->callback_arg, 2753 AC_PATH_REGISTERED, 2754 &path, &cpi); 2755 xpt_release_path(&path); 2756 2757 return(1); 2758 } 2759 2760 void 2761 xpt_action(union ccb *start_ccb) 2762 { 2763 int iopl; 2764 2765 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2766 2767 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2768 2769 iopl = splsoftcam(); 2770 switch (start_ccb->ccb_h.func_code) { 2771 case XPT_SCSI_IO: 2772 { 2773 #ifdef CAMDEBUG 2774 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2775 struct cam_path *path; 2776 2777 path = start_ccb->ccb_h.path; 2778 #endif 2779 2780 /* 2781 * For the sake of compatibility with SCSI-1 2782 * devices that may not understand the identify 2783 * message, we include lun information in the 2784 * second byte of all commands. SCSI-1 specifies 2785 * that luns are a 3 bit value and reserves only 3 2786 * bits for lun information in the CDB. Later 2787 * revisions of the SCSI spec allow for more than 8 2788 * luns, but have deprecated lun information in the 2789 * CDB. So, if the lun won't fit, we must omit. 2790 * 2791 * Also be aware that during initial probing for devices, 2792 * the inquiry information is unknown but initialized to 0. 2793 * This means that this code will be exercised while probing 2794 * devices with an ANSI revision greater than 2. 2795 */ 2796 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2797 && start_ccb->ccb_h.target_lun < 8 2798 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2799 2800 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2801 start_ccb->ccb_h.target_lun << 5; 2802 } 2803 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2804 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2805 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2806 &path->device->inq_data), 2807 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2808 cdb_str, sizeof(cdb_str)))); 2809 /* FALLTHROUGH */ 2810 } 2811 case XPT_TARGET_IO: 2812 case XPT_CONT_TARGET_IO: 2813 start_ccb->csio.sense_resid = 0; 2814 start_ccb->csio.resid = 0; 2815 /* FALLTHROUGH */ 2816 case XPT_RESET_DEV: 2817 case XPT_ENG_EXEC: 2818 { 2819 struct cam_path *path; 2820 int s; 2821 int runq; 2822 2823 path = start_ccb->ccb_h.path; 2824 s = splsoftcam(); 2825 2826 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2827 if (path->device->qfrozen_cnt == 0) 2828 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2829 else 2830 runq = 0; 2831 splx(s); 2832 if (runq != 0) 2833 xpt_run_dev_sendq(path->bus); 2834 break; 2835 } 2836 case XPT_SET_TRAN_SETTINGS: 2837 { 2838 xpt_set_transfer_settings(&start_ccb->cts, 2839 start_ccb->ccb_h.path->device, 2840 /*async_update*/FALSE); 2841 break; 2842 } 2843 case XPT_CALC_GEOMETRY: 2844 { 2845 struct cam_sim *sim; 2846 2847 /* Filter out garbage */ 2848 if (start_ccb->ccg.block_size == 0 2849 || start_ccb->ccg.volume_size == 0) { 2850 start_ccb->ccg.cylinders = 0; 2851 start_ccb->ccg.heads = 0; 2852 start_ccb->ccg.secs_per_track = 0; 2853 start_ccb->ccb_h.status = CAM_REQ_CMP; 2854 break; 2855 } 2856 #ifdef PC98 2857 /* 2858 * In a PC-98 system, geometry translation depens on 2859 * the "real" device geometry obtained from mode page 4. 2860 * SCSI geometry translation is performed in the 2861 * initialization routine of the SCSI BIOS and the result 2862 * stored in host memory. If the translation is available 2863 * in host memory, use it. If not, rely on the default 2864 * translation the device driver performs. 2865 */ 2866 if (scsi_da_bios_params(&start_ccb->ccg) != 0) { 2867 start_ccb->ccb_h.status = CAM_REQ_CMP; 2868 break; 2869 } 2870 #endif 2871 sim = start_ccb->ccb_h.path->bus->sim; 2872 (*(sim->sim_action))(sim, start_ccb); 2873 break; 2874 } 2875 case XPT_ABORT: 2876 { 2877 union ccb* abort_ccb; 2878 int s; 2879 2880 abort_ccb = start_ccb->cab.abort_ccb; 2881 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2882 2883 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2884 struct cam_ccbq *ccbq; 2885 2886 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 2887 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2888 abort_ccb->ccb_h.status = 2889 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2890 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2891 s = splcam(); 2892 xpt_done(abort_ccb); 2893 splx(s); 2894 start_ccb->ccb_h.status = CAM_REQ_CMP; 2895 break; 2896 } 2897 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2898 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2899 /* 2900 * We've caught this ccb en route to 2901 * the SIM. Flag it for abort and the 2902 * SIM will do so just before starting 2903 * real work on the CCB. 2904 */ 2905 abort_ccb->ccb_h.status = 2906 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2907 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2908 start_ccb->ccb_h.status = CAM_REQ_CMP; 2909 break; 2910 } 2911 } 2912 if (XPT_FC_IS_QUEUED(abort_ccb) 2913 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2914 /* 2915 * It's already completed but waiting 2916 * for our SWI to get to it. 2917 */ 2918 start_ccb->ccb_h.status = CAM_UA_ABORT; 2919 break; 2920 } 2921 /* 2922 * If we weren't able to take care of the abort request 2923 * in the XPT, pass the request down to the SIM for processing. 2924 */ 2925 /* FALLTHROUGH */ 2926 } 2927 case XPT_ACCEPT_TARGET_IO: 2928 case XPT_EN_LUN: 2929 case XPT_IMMED_NOTIFY: 2930 case XPT_NOTIFY_ACK: 2931 case XPT_GET_TRAN_SETTINGS: 2932 case XPT_RESET_BUS: 2933 { 2934 struct cam_sim *sim; 2935 2936 sim = start_ccb->ccb_h.path->bus->sim; 2937 (*(sim->sim_action))(sim, start_ccb); 2938 break; 2939 } 2940 case XPT_PATH_INQ: 2941 { 2942 struct cam_sim *sim; 2943 2944 sim = start_ccb->ccb_h.path->bus->sim; 2945 (*(sim->sim_action))(sim, start_ccb); 2946 break; 2947 } 2948 case XPT_PATH_STATS: 2949 start_ccb->cpis.last_reset = 2950 start_ccb->ccb_h.path->bus->last_reset; 2951 start_ccb->ccb_h.status = CAM_REQ_CMP; 2952 break; 2953 case XPT_GDEV_TYPE: 2954 { 2955 struct cam_ed *dev; 2956 int s; 2957 2958 dev = start_ccb->ccb_h.path->device; 2959 s = splcam(); 2960 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2961 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2962 } else { 2963 struct ccb_getdev *cgd; 2964 struct cam_eb *bus; 2965 struct cam_et *tar; 2966 2967 cgd = &start_ccb->cgd; 2968 bus = cgd->ccb_h.path->bus; 2969 tar = cgd->ccb_h.path->target; 2970 cgd->inq_data = dev->inq_data; 2971 cgd->ccb_h.status = CAM_REQ_CMP; 2972 cgd->serial_num_len = dev->serial_num_len; 2973 if ((dev->serial_num_len > 0) 2974 && (dev->serial_num != NULL)) 2975 bcopy(dev->serial_num, cgd->serial_num, 2976 dev->serial_num_len); 2977 } 2978 splx(s); 2979 break; 2980 } 2981 case XPT_GDEV_STATS: 2982 { 2983 struct cam_ed *dev; 2984 int s; 2985 2986 dev = start_ccb->ccb_h.path->device; 2987 s = splcam(); 2988 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2989 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2990 } else { 2991 struct ccb_getdevstats *cgds; 2992 struct cam_eb *bus; 2993 struct cam_et *tar; 2994 2995 cgds = &start_ccb->cgds; 2996 bus = cgds->ccb_h.path->bus; 2997 tar = cgds->ccb_h.path->target; 2998 cgds->dev_openings = dev->ccbq.dev_openings; 2999 cgds->dev_active = dev->ccbq.dev_active; 3000 cgds->devq_openings = dev->ccbq.devq_openings; 3001 cgds->devq_queued = dev->ccbq.queue.entries; 3002 cgds->held = dev->ccbq.held; 3003 cgds->last_reset = tar->last_reset; 3004 cgds->maxtags = dev->quirk->maxtags; 3005 cgds->mintags = dev->quirk->mintags; 3006 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3007 cgds->last_reset = bus->last_reset; 3008 cgds->ccb_h.status = CAM_REQ_CMP; 3009 } 3010 splx(s); 3011 break; 3012 } 3013 case XPT_GDEVLIST: 3014 { 3015 struct cam_periph *nperiph; 3016 struct periph_list *periph_head; 3017 struct ccb_getdevlist *cgdl; 3018 int i; 3019 int s; 3020 struct cam_ed *device; 3021 int found; 3022 3023 3024 found = 0; 3025 3026 /* 3027 * Don't want anyone mucking with our data. 3028 */ 3029 s = splcam(); 3030 device = start_ccb->ccb_h.path->device; 3031 periph_head = &device->periphs; 3032 cgdl = &start_ccb->cgdl; 3033 3034 /* 3035 * Check and see if the list has changed since the user 3036 * last requested a list member. If so, tell them that the 3037 * list has changed, and therefore they need to start over 3038 * from the beginning. 3039 */ 3040 if ((cgdl->index != 0) && 3041 (cgdl->generation != device->generation)) { 3042 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3043 splx(s); 3044 break; 3045 } 3046 3047 /* 3048 * Traverse the list of peripherals and attempt to find 3049 * the requested peripheral. 3050 */ 3051 for (nperiph = periph_head->slh_first, i = 0; 3052 (nperiph != NULL) && (i <= cgdl->index); 3053 nperiph = nperiph->periph_links.sle_next, i++) { 3054 if (i == cgdl->index) { 3055 strncpy(cgdl->periph_name, 3056 nperiph->periph_name, 3057 DEV_IDLEN); 3058 cgdl->unit_number = nperiph->unit_number; 3059 found = 1; 3060 } 3061 } 3062 if (found == 0) { 3063 cgdl->status = CAM_GDEVLIST_ERROR; 3064 splx(s); 3065 break; 3066 } 3067 3068 if (nperiph == NULL) 3069 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3070 else 3071 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3072 3073 cgdl->index++; 3074 cgdl->generation = device->generation; 3075 3076 splx(s); 3077 cgdl->ccb_h.status = CAM_REQ_CMP; 3078 break; 3079 } 3080 case XPT_DEV_MATCH: 3081 { 3082 int s; 3083 dev_pos_type position_type; 3084 struct ccb_dev_match *cdm; 3085 int ret; 3086 3087 cdm = &start_ccb->cdm; 3088 3089 /* 3090 * Prevent EDT changes while we traverse it. 3091 */ 3092 s = splcam(); 3093 /* 3094 * There are two ways of getting at information in the EDT. 3095 * The first way is via the primary EDT tree. It starts 3096 * with a list of busses, then a list of targets on a bus, 3097 * then devices/luns on a target, and then peripherals on a 3098 * device/lun. The "other" way is by the peripheral driver 3099 * lists. The peripheral driver lists are organized by 3100 * peripheral driver. (obviously) So it makes sense to 3101 * use the peripheral driver list if the user is looking 3102 * for something like "da1", or all "da" devices. If the 3103 * user is looking for something on a particular bus/target 3104 * or lun, it's generally better to go through the EDT tree. 3105 */ 3106 3107 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3108 position_type = cdm->pos.position_type; 3109 else { 3110 int i; 3111 3112 position_type = CAM_DEV_POS_NONE; 3113 3114 for (i = 0; i < cdm->num_patterns; i++) { 3115 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3116 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3117 position_type = CAM_DEV_POS_EDT; 3118 break; 3119 } 3120 } 3121 3122 if (cdm->num_patterns == 0) 3123 position_type = CAM_DEV_POS_EDT; 3124 else if (position_type == CAM_DEV_POS_NONE) 3125 position_type = CAM_DEV_POS_PDRV; 3126 } 3127 3128 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3129 case CAM_DEV_POS_EDT: 3130 ret = xptedtmatch(cdm); 3131 break; 3132 case CAM_DEV_POS_PDRV: 3133 ret = xptperiphlistmatch(cdm); 3134 break; 3135 default: 3136 cdm->status = CAM_DEV_MATCH_ERROR; 3137 break; 3138 } 3139 3140 splx(s); 3141 3142 if (cdm->status == CAM_DEV_MATCH_ERROR) 3143 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3144 else 3145 start_ccb->ccb_h.status = CAM_REQ_CMP; 3146 3147 break; 3148 } 3149 case XPT_SASYNC_CB: 3150 { 3151 struct ccb_setasync *csa; 3152 struct async_node *cur_entry; 3153 struct async_list *async_head; 3154 u_int32_t added; 3155 int s; 3156 3157 csa = &start_ccb->csa; 3158 added = csa->event_enable; 3159 async_head = &csa->ccb_h.path->device->asyncs; 3160 3161 /* 3162 * If there is already an entry for us, simply 3163 * update it. 3164 */ 3165 s = splcam(); 3166 cur_entry = SLIST_FIRST(async_head); 3167 while (cur_entry != NULL) { 3168 if ((cur_entry->callback_arg == csa->callback_arg) 3169 && (cur_entry->callback == csa->callback)) 3170 break; 3171 cur_entry = SLIST_NEXT(cur_entry, links); 3172 } 3173 3174 if (cur_entry != NULL) { 3175 /* 3176 * If the request has no flags set, 3177 * remove the entry. 3178 */ 3179 added &= ~cur_entry->event_enable; 3180 if (csa->event_enable == 0) { 3181 SLIST_REMOVE(async_head, cur_entry, 3182 async_node, links); 3183 csa->ccb_h.path->device->refcount--; 3184 free(cur_entry, M_DEVBUF); 3185 } else { 3186 cur_entry->event_enable = csa->event_enable; 3187 } 3188 } else { 3189 cur_entry = malloc(sizeof(*cur_entry), 3190 M_DEVBUF, M_INTWAIT); 3191 cur_entry->event_enable = csa->event_enable; 3192 cur_entry->callback_arg = csa->callback_arg; 3193 cur_entry->callback = csa->callback; 3194 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3195 csa->ccb_h.path->device->refcount++; 3196 } 3197 3198 if ((added & AC_FOUND_DEVICE) != 0) { 3199 /* 3200 * Get this peripheral up to date with all 3201 * the currently existing devices. 3202 */ 3203 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3204 } 3205 if ((added & AC_PATH_REGISTERED) != 0) { 3206 /* 3207 * Get this peripheral up to date with all 3208 * the currently existing busses. 3209 */ 3210 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3211 } 3212 splx(s); 3213 start_ccb->ccb_h.status = CAM_REQ_CMP; 3214 break; 3215 } 3216 case XPT_REL_SIMQ: 3217 { 3218 struct ccb_relsim *crs; 3219 struct cam_ed *dev; 3220 int s; 3221 3222 crs = &start_ccb->crs; 3223 dev = crs->ccb_h.path->device; 3224 if (dev == NULL) { 3225 3226 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3227 break; 3228 } 3229 3230 s = splcam(); 3231 3232 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3233 3234 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3235 3236 /* Don't ever go below one opening */ 3237 if (crs->openings > 0) { 3238 xpt_dev_ccbq_resize(crs->ccb_h.path, 3239 crs->openings); 3240 3241 if (bootverbose) { 3242 xpt_print_path(crs->ccb_h.path); 3243 printf("tagged openings " 3244 "now %d\n", 3245 crs->openings); 3246 } 3247 } 3248 } 3249 } 3250 3251 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3252 3253 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3254 3255 /* 3256 * Just extend the old timeout and decrement 3257 * the freeze count so that a single timeout 3258 * is sufficient for releasing the queue. 3259 */ 3260 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3261 callout_stop(&dev->c_handle); 3262 } else { 3263 3264 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3265 } 3266 3267 callout_reset(&dev->c_handle, 3268 (crs->release_timeout * hz) / 1000, 3269 xpt_release_devq_timeout, dev); 3270 3271 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3272 3273 } 3274 3275 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3276 3277 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3278 /* 3279 * Decrement the freeze count so that a single 3280 * completion is still sufficient to unfreeze 3281 * the queue. 3282 */ 3283 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3284 } else { 3285 3286 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3287 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3288 } 3289 } 3290 3291 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3292 3293 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3294 || (dev->ccbq.dev_active == 0)) { 3295 3296 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3297 } else { 3298 3299 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3300 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3301 } 3302 } 3303 splx(s); 3304 3305 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3306 3307 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3308 /*run_queue*/TRUE); 3309 } 3310 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3311 start_ccb->ccb_h.status = CAM_REQ_CMP; 3312 break; 3313 } 3314 case XPT_SCAN_BUS: 3315 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3316 break; 3317 case XPT_SCAN_LUN: 3318 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3319 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3320 start_ccb); 3321 break; 3322 case XPT_DEBUG: { 3323 #ifdef CAMDEBUG 3324 int s; 3325 3326 s = splcam(); 3327 #ifdef CAM_DEBUG_DELAY 3328 cam_debug_delay = CAM_DEBUG_DELAY; 3329 #endif 3330 cam_dflags = start_ccb->cdbg.flags; 3331 if (cam_dpath != NULL) { 3332 xpt_free_path(cam_dpath); 3333 cam_dpath = NULL; 3334 } 3335 3336 if (cam_dflags != CAM_DEBUG_NONE) { 3337 if (xpt_create_path(&cam_dpath, xpt_periph, 3338 start_ccb->ccb_h.path_id, 3339 start_ccb->ccb_h.target_id, 3340 start_ccb->ccb_h.target_lun) != 3341 CAM_REQ_CMP) { 3342 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3343 cam_dflags = CAM_DEBUG_NONE; 3344 } else { 3345 start_ccb->ccb_h.status = CAM_REQ_CMP; 3346 xpt_print_path(cam_dpath); 3347 printf("debugging flags now %x\n", cam_dflags); 3348 } 3349 } else { 3350 cam_dpath = NULL; 3351 start_ccb->ccb_h.status = CAM_REQ_CMP; 3352 } 3353 splx(s); 3354 #else /* !CAMDEBUG */ 3355 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3356 #endif /* CAMDEBUG */ 3357 break; 3358 } 3359 case XPT_NOOP: 3360 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3361 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3362 start_ccb->ccb_h.status = CAM_REQ_CMP; 3363 break; 3364 default: 3365 case XPT_SDEV_TYPE: 3366 case XPT_TERM_IO: 3367 case XPT_ENG_INQ: 3368 /* XXX Implement */ 3369 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3370 break; 3371 } 3372 splx(iopl); 3373 } 3374 3375 void 3376 xpt_polled_action(union ccb *start_ccb) 3377 { 3378 int s; 3379 u_int32_t timeout; 3380 struct cam_sim *sim; 3381 struct cam_devq *devq; 3382 struct cam_ed *dev; 3383 3384 timeout = start_ccb->ccb_h.timeout; 3385 sim = start_ccb->ccb_h.path->bus->sim; 3386 devq = sim->devq; 3387 dev = start_ccb->ccb_h.path->device; 3388 3389 s = splcam(); 3390 3391 /* 3392 * Steal an opening so that no other queued requests 3393 * can get it before us while we simulate interrupts. 3394 */ 3395 dev->ccbq.devq_openings--; 3396 dev->ccbq.dev_openings--; 3397 3398 while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0) 3399 && (--timeout > 0)) { 3400 DELAY(1000); 3401 (*(sim->sim_poll))(sim); 3402 swi_camnet(NULL); 3403 swi_cambio(NULL); 3404 } 3405 3406 dev->ccbq.devq_openings++; 3407 dev->ccbq.dev_openings++; 3408 3409 if (timeout != 0) { 3410 xpt_action(start_ccb); 3411 while(--timeout > 0) { 3412 (*(sim->sim_poll))(sim); 3413 swi_camnet(NULL); 3414 swi_cambio(NULL); 3415 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3416 != CAM_REQ_INPROG) 3417 break; 3418 DELAY(1000); 3419 } 3420 if (timeout == 0) { 3421 /* 3422 * XXX Is it worth adding a sim_timeout entry 3423 * point so we can attempt recovery? If 3424 * this is only used for dumps, I don't think 3425 * it is. 3426 */ 3427 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3428 } 3429 } else { 3430 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3431 } 3432 splx(s); 3433 } 3434 3435 /* 3436 * Schedule a peripheral driver to receive a ccb when it's 3437 * target device has space for more transactions. 3438 */ 3439 void 3440 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3441 { 3442 struct cam_ed *device; 3443 int s; 3444 int runq; 3445 3446 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3447 device = perph->path->device; 3448 s = splsoftcam(); 3449 if (periph_is_queued(perph)) { 3450 /* Simply reorder based on new priority */ 3451 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3452 (" change priority to %d\n", new_priority)); 3453 if (new_priority < perph->pinfo.priority) { 3454 camq_change_priority(&device->drvq, 3455 perph->pinfo.index, 3456 new_priority); 3457 } 3458 runq = 0; 3459 } else { 3460 /* New entry on the queue */ 3461 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3462 (" added periph to queue\n")); 3463 perph->pinfo.priority = new_priority; 3464 perph->pinfo.generation = ++device->drvq.generation; 3465 camq_insert(&device->drvq, &perph->pinfo); 3466 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3467 } 3468 splx(s); 3469 if (runq != 0) { 3470 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3471 (" calling xpt_run_devq\n")); 3472 xpt_run_dev_allocq(perph->path->bus); 3473 } 3474 } 3475 3476 3477 /* 3478 * Schedule a device to run on a given queue. 3479 * If the device was inserted as a new entry on the queue, 3480 * return 1 meaning the device queue should be run. If we 3481 * were already queued, implying someone else has already 3482 * started the queue, return 0 so the caller doesn't attempt 3483 * to run the queue. Must be run at either splsoftcam 3484 * (or splcam since that encompases splsoftcam). 3485 */ 3486 static int 3487 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3488 u_int32_t new_priority) 3489 { 3490 int retval; 3491 u_int32_t old_priority; 3492 3493 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3494 3495 old_priority = pinfo->priority; 3496 3497 /* 3498 * Are we already queued? 3499 */ 3500 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3501 /* Simply reorder based on new priority */ 3502 if (new_priority < old_priority) { 3503 camq_change_priority(queue, pinfo->index, 3504 new_priority); 3505 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3506 ("changed priority to %d\n", 3507 new_priority)); 3508 } 3509 retval = 0; 3510 } else { 3511 /* New entry on the queue */ 3512 if (new_priority < old_priority) 3513 pinfo->priority = new_priority; 3514 3515 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3516 ("Inserting onto queue\n")); 3517 pinfo->generation = ++queue->generation; 3518 camq_insert(queue, pinfo); 3519 retval = 1; 3520 } 3521 return (retval); 3522 } 3523 3524 static void 3525 xpt_run_dev_allocq(struct cam_eb *bus) 3526 { 3527 struct cam_devq *devq; 3528 int s; 3529 3530 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3531 devq = bus->sim->devq; 3532 3533 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3534 (" qfrozen_cnt == 0x%x, entries == %d, " 3535 "openings == %d, active == %d\n", 3536 devq->alloc_queue.qfrozen_cnt, 3537 devq->alloc_queue.entries, 3538 devq->alloc_openings, 3539 devq->alloc_active)); 3540 3541 s = splsoftcam(); 3542 devq->alloc_queue.qfrozen_cnt++; 3543 while ((devq->alloc_queue.entries > 0) 3544 && (devq->alloc_openings > 0) 3545 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3546 struct cam_ed_qinfo *qinfo; 3547 struct cam_ed *device; 3548 union ccb *work_ccb; 3549 struct cam_periph *drv; 3550 struct camq *drvq; 3551 3552 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3553 CAMQ_HEAD); 3554 device = qinfo->device; 3555 3556 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3557 ("running device %p\n", device)); 3558 3559 drvq = &device->drvq; 3560 3561 #ifdef CAMDEBUG 3562 if (drvq->entries <= 0) { 3563 panic("xpt_run_dev_allocq: " 3564 "Device on queue without any work to do"); 3565 } 3566 #endif 3567 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3568 devq->alloc_openings--; 3569 devq->alloc_active++; 3570 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3571 splx(s); 3572 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3573 drv->pinfo.priority); 3574 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3575 ("calling periph start\n")); 3576 drv->periph_start(drv, work_ccb); 3577 } else { 3578 /* 3579 * Malloc failure in alloc_ccb 3580 */ 3581 /* 3582 * XXX add us to a list to be run from free_ccb 3583 * if we don't have any ccbs active on this 3584 * device queue otherwise we may never get run 3585 * again. 3586 */ 3587 break; 3588 } 3589 3590 /* Raise IPL for possible insertion and test at top of loop */ 3591 s = splsoftcam(); 3592 3593 if (drvq->entries > 0) { 3594 /* We have more work. Attempt to reschedule */ 3595 xpt_schedule_dev_allocq(bus, device); 3596 } 3597 } 3598 devq->alloc_queue.qfrozen_cnt--; 3599 splx(s); 3600 } 3601 3602 static void 3603 xpt_run_dev_sendq(struct cam_eb *bus) 3604 { 3605 struct cam_devq *devq; 3606 int s; 3607 3608 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3609 3610 devq = bus->sim->devq; 3611 3612 s = splcam(); 3613 devq->send_queue.qfrozen_cnt++; 3614 splx(s); 3615 s = splsoftcam(); 3616 while ((devq->send_queue.entries > 0) 3617 && (devq->send_openings > 0)) { 3618 struct cam_ed_qinfo *qinfo; 3619 struct cam_ed *device; 3620 union ccb *work_ccb; 3621 struct cam_sim *sim; 3622 int ospl; 3623 3624 ospl = splcam(); 3625 if (devq->send_queue.qfrozen_cnt > 1) { 3626 splx(ospl); 3627 break; 3628 } 3629 3630 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3631 CAMQ_HEAD); 3632 device = qinfo->device; 3633 3634 /* 3635 * If the device has been "frozen", don't attempt 3636 * to run it. 3637 */ 3638 if (device->qfrozen_cnt > 0) { 3639 splx(ospl); 3640 continue; 3641 } 3642 3643 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3644 ("running device %p\n", device)); 3645 3646 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3647 if (work_ccb == NULL) { 3648 printf("device on run queue with no ccbs???\n"); 3649 splx(ospl); 3650 continue; 3651 } 3652 3653 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3654 3655 if (num_highpower <= 0) { 3656 /* 3657 * We got a high power command, but we 3658 * don't have any available slots. Freeze 3659 * the device queue until we have a slot 3660 * available. 3661 */ 3662 device->qfrozen_cnt++; 3663 STAILQ_INSERT_TAIL(&highpowerq, 3664 &work_ccb->ccb_h, 3665 xpt_links.stqe); 3666 3667 splx(ospl); 3668 continue; 3669 } else { 3670 /* 3671 * Consume a high power slot while 3672 * this ccb runs. 3673 */ 3674 num_highpower--; 3675 } 3676 } 3677 devq->active_dev = device; 3678 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3679 3680 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3681 splx(ospl); 3682 3683 devq->send_openings--; 3684 devq->send_active++; 3685 3686 if (device->ccbq.queue.entries > 0) 3687 xpt_schedule_dev_sendq(bus, device); 3688 3689 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3690 /* 3691 * The client wants to freeze the queue 3692 * after this CCB is sent. 3693 */ 3694 ospl = splcam(); 3695 device->qfrozen_cnt++; 3696 splx(ospl); 3697 } 3698 3699 splx(s); 3700 3701 /* In Target mode, the peripheral driver knows best... */ 3702 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3703 if ((device->inq_flags & SID_CmdQue) != 0 3704 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3705 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3706 else 3707 /* 3708 * Clear this in case of a retried CCB that 3709 * failed due to a rejected tag. 3710 */ 3711 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3712 } 3713 3714 /* 3715 * Device queues can be shared among multiple sim instances 3716 * that reside on different busses. Use the SIM in the queue 3717 * CCB's path, rather than the one in the bus that was passed 3718 * into this function. 3719 */ 3720 sim = work_ccb->ccb_h.path->bus->sim; 3721 (*(sim->sim_action))(sim, work_ccb); 3722 3723 ospl = splcam(); 3724 devq->active_dev = NULL; 3725 splx(ospl); 3726 /* Raise IPL for possible insertion and test at top of loop */ 3727 s = splsoftcam(); 3728 } 3729 splx(s); 3730 s = splcam(); 3731 devq->send_queue.qfrozen_cnt--; 3732 splx(s); 3733 } 3734 3735 /* 3736 * This function merges stuff from the slave ccb into the master ccb, while 3737 * keeping important fields in the master ccb constant. 3738 */ 3739 void 3740 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3741 { 3742 /* 3743 * Pull fields that are valid for peripheral drivers to set 3744 * into the master CCB along with the CCB "payload". 3745 */ 3746 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3747 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3748 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3749 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3750 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3751 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3752 } 3753 3754 void 3755 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3756 { 3757 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3758 callout_init(&ccb_h->timeout_ch); 3759 ccb_h->pinfo.priority = priority; 3760 ccb_h->path = path; 3761 ccb_h->path_id = path->bus->path_id; 3762 if (path->target) 3763 ccb_h->target_id = path->target->target_id; 3764 else 3765 ccb_h->target_id = CAM_TARGET_WILDCARD; 3766 if (path->device) { 3767 ccb_h->target_lun = path->device->lun_id; 3768 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3769 } else { 3770 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3771 } 3772 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3773 ccb_h->flags = 0; 3774 } 3775 3776 /* Path manipulation functions */ 3777 cam_status 3778 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3779 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3780 { 3781 struct cam_path *path; 3782 cam_status status; 3783 3784 path = malloc(sizeof(*path), M_DEVBUF, M_INTWAIT); 3785 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3786 if (status != CAM_REQ_CMP) { 3787 free(path, M_DEVBUF); 3788 path = NULL; 3789 } 3790 *new_path_ptr = path; 3791 return (status); 3792 } 3793 3794 static cam_status 3795 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3796 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3797 { 3798 struct cam_eb *bus; 3799 struct cam_et *target; 3800 struct cam_ed *device; 3801 cam_status status; 3802 int s; 3803 3804 status = CAM_REQ_CMP; /* Completed without error */ 3805 target = NULL; /* Wildcarded */ 3806 device = NULL; /* Wildcarded */ 3807 3808 /* 3809 * We will potentially modify the EDT, so block interrupts 3810 * that may attempt to create cam paths. 3811 */ 3812 s = splcam(); 3813 bus = xpt_find_bus(path_id); 3814 if (bus == NULL) { 3815 status = CAM_PATH_INVALID; 3816 } else { 3817 target = xpt_find_target(bus, target_id); 3818 if (target == NULL) { 3819 /* Create one */ 3820 struct cam_et *new_target; 3821 3822 new_target = xpt_alloc_target(bus, target_id); 3823 if (new_target == NULL) { 3824 status = CAM_RESRC_UNAVAIL; 3825 } else { 3826 target = new_target; 3827 } 3828 } 3829 if (target != NULL) { 3830 device = xpt_find_device(target, lun_id); 3831 if (device == NULL) { 3832 /* Create one */ 3833 struct cam_ed *new_device; 3834 3835 new_device = xpt_alloc_device(bus, 3836 target, 3837 lun_id); 3838 if (new_device == NULL) { 3839 status = CAM_RESRC_UNAVAIL; 3840 } else { 3841 device = new_device; 3842 } 3843 } 3844 } 3845 } 3846 splx(s); 3847 3848 /* 3849 * Only touch the user's data if we are successful. 3850 */ 3851 if (status == CAM_REQ_CMP) { 3852 new_path->periph = perph; 3853 new_path->bus = bus; 3854 new_path->target = target; 3855 new_path->device = device; 3856 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3857 } else { 3858 if (device != NULL) 3859 xpt_release_device(bus, target, device); 3860 if (target != NULL) 3861 xpt_release_target(bus, target); 3862 if (bus != NULL) 3863 xpt_release_bus(bus); 3864 } 3865 return (status); 3866 } 3867 3868 static void 3869 xpt_release_path(struct cam_path *path) 3870 { 3871 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3872 if (path->device != NULL) { 3873 xpt_release_device(path->bus, path->target, path->device); 3874 path->device = NULL; 3875 } 3876 if (path->target != NULL) { 3877 xpt_release_target(path->bus, path->target); 3878 path->target = NULL; 3879 } 3880 if (path->bus != NULL) { 3881 xpt_release_bus(path->bus); 3882 path->bus = NULL; 3883 } 3884 } 3885 3886 void 3887 xpt_free_path(struct cam_path *path) 3888 { 3889 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3890 xpt_release_path(path); 3891 free(path, M_DEVBUF); 3892 } 3893 3894 3895 /* 3896 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3897 * in path1, 2 for match with wildcards in path2. 3898 */ 3899 int 3900 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3901 { 3902 int retval = 0; 3903 3904 if (path1->bus != path2->bus) { 3905 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3906 retval = 1; 3907 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3908 retval = 2; 3909 else 3910 return (-1); 3911 } 3912 if (path1->target != path2->target) { 3913 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3914 if (retval == 0) 3915 retval = 1; 3916 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3917 retval = 2; 3918 else 3919 return (-1); 3920 } 3921 if (path1->device != path2->device) { 3922 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3923 if (retval == 0) 3924 retval = 1; 3925 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3926 retval = 2; 3927 else 3928 return (-1); 3929 } 3930 return (retval); 3931 } 3932 3933 void 3934 xpt_print_path(struct cam_path *path) 3935 { 3936 if (path == NULL) 3937 printf("(nopath): "); 3938 else { 3939 if (path->periph != NULL) 3940 printf("(%s%d:", path->periph->periph_name, 3941 path->periph->unit_number); 3942 else 3943 printf("(noperiph:"); 3944 3945 if (path->bus != NULL) 3946 printf("%s%d:%d:", path->bus->sim->sim_name, 3947 path->bus->sim->unit_number, 3948 path->bus->sim->bus_id); 3949 else 3950 printf("nobus:"); 3951 3952 if (path->target != NULL) 3953 printf("%d:", path->target->target_id); 3954 else 3955 printf("X:"); 3956 3957 if (path->device != NULL) 3958 printf("%d): ", path->device->lun_id); 3959 else 3960 printf("X): "); 3961 } 3962 } 3963 3964 path_id_t 3965 xpt_path_path_id(struct cam_path *path) 3966 { 3967 return(path->bus->path_id); 3968 } 3969 3970 target_id_t 3971 xpt_path_target_id(struct cam_path *path) 3972 { 3973 if (path->target != NULL) 3974 return (path->target->target_id); 3975 else 3976 return (CAM_TARGET_WILDCARD); 3977 } 3978 3979 lun_id_t 3980 xpt_path_lun_id(struct cam_path *path) 3981 { 3982 if (path->device != NULL) 3983 return (path->device->lun_id); 3984 else 3985 return (CAM_LUN_WILDCARD); 3986 } 3987 3988 struct cam_sim * 3989 xpt_path_sim(struct cam_path *path) 3990 { 3991 return (path->bus->sim); 3992 } 3993 3994 struct cam_periph* 3995 xpt_path_periph(struct cam_path *path) 3996 { 3997 return (path->periph); 3998 } 3999 4000 /* 4001 * Release a CAM control block for the caller. Remit the cost of the structure 4002 * to the device referenced by the path. If the this device had no 'credits' 4003 * and peripheral drivers have registered async callbacks for this notification 4004 * call them now. 4005 */ 4006 void 4007 xpt_release_ccb(union ccb *free_ccb) 4008 { 4009 int s; 4010 struct cam_path *path; 4011 struct cam_ed *device; 4012 struct cam_eb *bus; 4013 4014 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4015 path = free_ccb->ccb_h.path; 4016 device = path->device; 4017 bus = path->bus; 4018 s = splsoftcam(); 4019 cam_ccbq_release_opening(&device->ccbq); 4020 if (xpt_ccb_count > xpt_max_ccbs) { 4021 xpt_free_ccb(free_ccb); 4022 xpt_ccb_count--; 4023 } else { 4024 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 4025 } 4026 bus->sim->devq->alloc_openings++; 4027 bus->sim->devq->alloc_active--; 4028 /* XXX Turn this into an inline function - xpt_run_device?? */ 4029 if ((device_is_alloc_queued(device) == 0) 4030 && (device->drvq.entries > 0)) { 4031 xpt_schedule_dev_allocq(bus, device); 4032 } 4033 splx(s); 4034 if (dev_allocq_is_runnable(bus->sim->devq)) 4035 xpt_run_dev_allocq(bus); 4036 } 4037 4038 /* Functions accessed by SIM drivers */ 4039 4040 /* 4041 * A sim structure, listing the SIM entry points and instance 4042 * identification info is passed to xpt_bus_register to hook the SIM 4043 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4044 * for this new bus and places it in the array of busses and assigns 4045 * it a path_id. The path_id may be influenced by "hard wiring" 4046 * information specified by the user. Once interrupt services are 4047 * availible, the bus will be probed. 4048 */ 4049 int32_t 4050 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4051 { 4052 struct cam_eb *new_bus; 4053 struct cam_eb *old_bus; 4054 struct ccb_pathinq cpi; 4055 int s; 4056 4057 sim->bus_id = bus; 4058 new_bus = malloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT); 4059 4060 if (strcmp(sim->sim_name, "xpt") != 0) { 4061 sim->path_id = 4062 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4063 } 4064 4065 TAILQ_INIT(&new_bus->et_entries); 4066 new_bus->path_id = sim->path_id; 4067 new_bus->sim = sim; 4068 ++sim->refcount; 4069 timevalclear(&new_bus->last_reset); 4070 new_bus->flags = 0; 4071 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4072 new_bus->generation = 0; 4073 s = splcam(); 4074 old_bus = TAILQ_FIRST(&xpt_busses); 4075 while (old_bus != NULL 4076 && old_bus->path_id < new_bus->path_id) 4077 old_bus = TAILQ_NEXT(old_bus, links); 4078 if (old_bus != NULL) 4079 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4080 else 4081 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 4082 bus_generation++; 4083 splx(s); 4084 4085 /* Notify interested parties */ 4086 if (sim->path_id != CAM_XPT_PATH_ID) { 4087 struct cam_path path; 4088 4089 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4090 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4091 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4092 cpi.ccb_h.func_code = XPT_PATH_INQ; 4093 xpt_action((union ccb *)&cpi); 4094 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi); 4095 xpt_release_path(&path); 4096 } 4097 return (CAM_SUCCESS); 4098 } 4099 4100 /* 4101 * Deregister a bus. We must clean out all transactions pending on the bus. 4102 * This routine is typically called prior to cam_sim_free() (e.g. see 4103 * dev/usbmisc/umass/umass.c) 4104 */ 4105 int32_t 4106 xpt_bus_deregister(path_id_t pathid) 4107 { 4108 struct cam_path bus_path; 4109 cam_status status; 4110 4111 status = xpt_compile_path(&bus_path, NULL, pathid, 4112 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4113 if (status != CAM_REQ_CMP) 4114 return (status); 4115 4116 /* 4117 * This should clear out all pending requests and timeouts, but 4118 * the ccb's may be queued to a software interrupt. 4119 * 4120 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4121 * and it really ought to. 4122 */ 4123 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4124 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4125 4126 /* make sure all responses have been processed */ 4127 camisr(&cam_netq); 4128 camisr(&cam_bioq); 4129 4130 /* Release the reference count held while registered. */ 4131 xpt_release_bus(bus_path.bus); 4132 xpt_release_path(&bus_path); 4133 4134 return (CAM_REQ_CMP); 4135 } 4136 4137 static path_id_t 4138 xptnextfreepathid(void) 4139 { 4140 struct cam_eb *bus; 4141 path_id_t pathid; 4142 char *strval; 4143 4144 pathid = 0; 4145 bus = TAILQ_FIRST(&xpt_busses); 4146 retry: 4147 /* Find an unoccupied pathid */ 4148 while (bus != NULL 4149 && bus->path_id <= pathid) { 4150 if (bus->path_id == pathid) 4151 pathid++; 4152 bus = TAILQ_NEXT(bus, links); 4153 } 4154 4155 /* 4156 * Ensure that this pathid is not reserved for 4157 * a bus that may be registered in the future. 4158 */ 4159 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4160 ++pathid; 4161 /* Start the search over */ 4162 goto retry; 4163 } 4164 return (pathid); 4165 } 4166 4167 static path_id_t 4168 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4169 { 4170 path_id_t pathid; 4171 int i, dunit, val; 4172 char buf[32], *strval; 4173 4174 pathid = CAM_XPT_PATH_ID; 4175 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4176 i = -1; 4177 while ((i = resource_locate(i, "scbus")) != -1) { 4178 dunit = resource_query_unit(i); 4179 if (dunit < 0) /* unwired?! */ 4180 continue; 4181 if (resource_string_value("scbus", dunit, "at", &strval) != 0) 4182 continue; 4183 if (strcmp(buf, strval) != 0) 4184 continue; 4185 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4186 if (sim_bus == val) { 4187 pathid = dunit; 4188 break; 4189 } 4190 } else if (sim_bus == 0) { 4191 /* Unspecified matches bus 0 */ 4192 pathid = dunit; 4193 break; 4194 } else { 4195 printf("Ambiguous scbus configuration for %s%d " 4196 "bus %d, cannot wire down. The kernel " 4197 "config entry for scbus%d should " 4198 "specify a controller bus.\n" 4199 "Scbus will be assigned dynamically.\n", 4200 sim_name, sim_unit, sim_bus, dunit); 4201 break; 4202 } 4203 } 4204 4205 if (pathid == CAM_XPT_PATH_ID) 4206 pathid = xptnextfreepathid(); 4207 return (pathid); 4208 } 4209 4210 void 4211 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4212 { 4213 struct cam_eb *bus; 4214 struct cam_et *target, *next_target; 4215 struct cam_ed *device, *next_device; 4216 int s; 4217 4218 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4219 4220 /* 4221 * Most async events come from a CAM interrupt context. In 4222 * a few cases, the error recovery code at the peripheral layer, 4223 * which may run from our SWI or a process context, may signal 4224 * deferred events with a call to xpt_async. Ensure async 4225 * notifications are serialized by blocking cam interrupts. 4226 */ 4227 s = splcam(); 4228 4229 bus = path->bus; 4230 4231 if (async_code == AC_BUS_RESET) { 4232 /* Update our notion of when the last reset occurred */ 4233 microuptime(&bus->last_reset); 4234 } 4235 4236 for (target = TAILQ_FIRST(&bus->et_entries); 4237 target != NULL; 4238 target = next_target) { 4239 4240 next_target = TAILQ_NEXT(target, links); 4241 4242 if (path->target != target 4243 && path->target->target_id != CAM_TARGET_WILDCARD 4244 && target->target_id != CAM_TARGET_WILDCARD) 4245 continue; 4246 4247 if (async_code == AC_SENT_BDR) { 4248 /* Update our notion of when the last reset occurred */ 4249 microuptime(&path->target->last_reset); 4250 } 4251 4252 for (device = TAILQ_FIRST(&target->ed_entries); 4253 device != NULL; 4254 device = next_device) { 4255 4256 next_device = TAILQ_NEXT(device, links); 4257 4258 if (path->device != device 4259 && path->device->lun_id != CAM_LUN_WILDCARD 4260 && device->lun_id != CAM_LUN_WILDCARD) 4261 continue; 4262 4263 xpt_dev_async(async_code, bus, target, 4264 device, async_arg); 4265 4266 xpt_async_bcast(&device->asyncs, async_code, 4267 path, async_arg); 4268 } 4269 } 4270 4271 /* 4272 * If this wasn't a fully wildcarded async, tell all 4273 * clients that want all async events. 4274 */ 4275 if (bus != xpt_periph->path->bus) 4276 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4277 path, async_arg); 4278 splx(s); 4279 } 4280 4281 static void 4282 xpt_async_bcast(struct async_list *async_head, 4283 u_int32_t async_code, 4284 struct cam_path *path, void *async_arg) 4285 { 4286 struct async_node *cur_entry; 4287 4288 cur_entry = SLIST_FIRST(async_head); 4289 while (cur_entry != NULL) { 4290 struct async_node *next_entry; 4291 /* 4292 * Grab the next list entry before we call the current 4293 * entry's callback. This is because the callback function 4294 * can delete its async callback entry. 4295 */ 4296 next_entry = SLIST_NEXT(cur_entry, links); 4297 if ((cur_entry->event_enable & async_code) != 0) 4298 cur_entry->callback(cur_entry->callback_arg, 4299 async_code, path, 4300 async_arg); 4301 cur_entry = next_entry; 4302 } 4303 } 4304 4305 /* 4306 * Handle any per-device event notifications that require action by the XPT. 4307 */ 4308 static void 4309 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4310 struct cam_ed *device, void *async_arg) 4311 { 4312 cam_status status; 4313 struct cam_path newpath; 4314 4315 /* 4316 * We only need to handle events for real devices. 4317 */ 4318 if (target->target_id == CAM_TARGET_WILDCARD 4319 || device->lun_id == CAM_LUN_WILDCARD) 4320 return; 4321 4322 /* 4323 * We need our own path with wildcards expanded to 4324 * handle certain types of events. 4325 */ 4326 if ((async_code == AC_SENT_BDR) 4327 || (async_code == AC_BUS_RESET) 4328 || (async_code == AC_INQ_CHANGED)) 4329 status = xpt_compile_path(&newpath, NULL, 4330 bus->path_id, 4331 target->target_id, 4332 device->lun_id); 4333 else 4334 status = CAM_REQ_CMP_ERR; 4335 4336 if (status == CAM_REQ_CMP) { 4337 4338 /* 4339 * Allow transfer negotiation to occur in a 4340 * tag free environment. 4341 */ 4342 if (async_code == AC_SENT_BDR 4343 || async_code == AC_BUS_RESET) 4344 xpt_toggle_tags(&newpath); 4345 4346 if (async_code == AC_INQ_CHANGED) { 4347 /* 4348 * We've sent a start unit command, or 4349 * something similar to a device that 4350 * may have caused its inquiry data to 4351 * change. So we re-scan the device to 4352 * refresh the inquiry data for it. 4353 */ 4354 xpt_scan_lun(newpath.periph, &newpath, 4355 CAM_EXPECT_INQ_CHANGE, NULL); 4356 } 4357 xpt_release_path(&newpath); 4358 } else if (async_code == AC_LOST_DEVICE) { 4359 /* 4360 * When we lose a device the device may be about to detach 4361 * the sim, we have to clear out all pending timeouts and 4362 * requests before that happens. XXX it would be nice if 4363 * we could abort the requests pertaining to the device. 4364 */ 4365 xpt_release_devq_timeout(device); 4366 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4367 device->flags |= CAM_DEV_UNCONFIGURED; 4368 xpt_release_device(bus, target, device); 4369 } 4370 } else if (async_code == AC_TRANSFER_NEG) { 4371 struct ccb_trans_settings *settings; 4372 4373 settings = (struct ccb_trans_settings *)async_arg; 4374 xpt_set_transfer_settings(settings, device, 4375 /*async_update*/TRUE); 4376 } 4377 } 4378 4379 u_int32_t 4380 xpt_freeze_devq(struct cam_path *path, u_int count) 4381 { 4382 int s; 4383 struct ccb_hdr *ccbh; 4384 4385 s = splcam(); 4386 path->device->qfrozen_cnt += count; 4387 4388 /* 4389 * Mark the last CCB in the queue as needing 4390 * to be requeued if the driver hasn't 4391 * changed it's state yet. This fixes a race 4392 * where a ccb is just about to be queued to 4393 * a controller driver when it's interrupt routine 4394 * freezes the queue. To completly close the 4395 * hole, controller drives must check to see 4396 * if a ccb's status is still CAM_REQ_INPROG 4397 * under spl protection just before they queue 4398 * the CCB. See ahc_action/ahc_freeze_devq for 4399 * an example. 4400 */ 4401 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4402 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4403 ccbh->status = CAM_REQUEUE_REQ; 4404 splx(s); 4405 return (path->device->qfrozen_cnt); 4406 } 4407 4408 u_int32_t 4409 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4410 { 4411 sim->devq->send_queue.qfrozen_cnt += count; 4412 if (sim->devq->active_dev != NULL) { 4413 struct ccb_hdr *ccbh; 4414 4415 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4416 ccb_hdr_tailq); 4417 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4418 ccbh->status = CAM_REQUEUE_REQ; 4419 } 4420 return (sim->devq->send_queue.qfrozen_cnt); 4421 } 4422 4423 /* 4424 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4425 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4426 * freed, which is not the case here), but the device queue is also freed XXX 4427 * and we have to check that here. 4428 * 4429 * XXX fixme: could we simply not null-out the device queue via 4430 * cam_sim_free()? 4431 */ 4432 static void 4433 xpt_release_devq_timeout(void *arg) 4434 { 4435 struct cam_ed *device; 4436 4437 device = (struct cam_ed *)arg; 4438 4439 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4440 } 4441 4442 void 4443 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4444 { 4445 xpt_release_devq_device(path->device, count, run_queue); 4446 } 4447 4448 static void 4449 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4450 { 4451 int rundevq; 4452 int s0, s1; 4453 4454 rundevq = 0; 4455 s0 = splsoftcam(); 4456 s1 = splcam(); 4457 4458 if (dev->qfrozen_cnt > 0) { 4459 4460 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4461 dev->qfrozen_cnt -= count; 4462 if (dev->qfrozen_cnt == 0) { 4463 4464 /* 4465 * No longer need to wait for a successful 4466 * command completion. 4467 */ 4468 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4469 4470 /* 4471 * Remove any timeouts that might be scheduled 4472 * to release this queue. 4473 */ 4474 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4475 callout_stop(&dev->c_handle); 4476 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4477 } 4478 4479 /* 4480 * Now that we are unfrozen schedule the 4481 * device so any pending transactions are 4482 * run. 4483 */ 4484 if ((dev->ccbq.queue.entries > 0) 4485 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4486 && (run_queue != 0)) { 4487 rundevq = 1; 4488 } 4489 } 4490 } 4491 splx(s1); 4492 if (rundevq != 0) 4493 xpt_run_dev_sendq(dev->target->bus); 4494 splx(s0); 4495 } 4496 4497 void 4498 xpt_release_simq(struct cam_sim *sim, int run_queue) 4499 { 4500 int s; 4501 struct camq *sendq; 4502 4503 sendq = &(sim->devq->send_queue); 4504 s = splcam(); 4505 if (sendq->qfrozen_cnt > 0) { 4506 4507 sendq->qfrozen_cnt--; 4508 if (sendq->qfrozen_cnt == 0) { 4509 struct cam_eb *bus; 4510 4511 /* 4512 * If there is a timeout scheduled to release this 4513 * sim queue, remove it. The queue frozen count is 4514 * already at 0. 4515 */ 4516 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4517 callout_stop(&sim->c_handle); 4518 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4519 } 4520 bus = xpt_find_bus(sim->path_id); 4521 splx(s); 4522 4523 if (run_queue) { 4524 /* 4525 * Now that we are unfrozen run the send queue. 4526 */ 4527 xpt_run_dev_sendq(bus); 4528 } 4529 xpt_release_bus(bus); 4530 } else 4531 splx(s); 4532 } else 4533 splx(s); 4534 } 4535 4536 void 4537 xpt_done(union ccb *done_ccb) 4538 { 4539 int s; 4540 4541 s = splcam(); 4542 4543 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4544 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4545 /* 4546 * Queue up the request for handling by our SWI handler 4547 * any of the "non-immediate" type of ccbs. 4548 */ 4549 switch (done_ccb->ccb_h.path->periph->type) { 4550 case CAM_PERIPH_BIO: 4551 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4552 sim_links.tqe); 4553 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4554 setsoftcambio(); 4555 break; 4556 case CAM_PERIPH_NET: 4557 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4558 sim_links.tqe); 4559 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4560 setsoftcamnet(); 4561 break; 4562 } 4563 } 4564 splx(s); 4565 } 4566 4567 union ccb * 4568 xpt_alloc_ccb() 4569 { 4570 union ccb *new_ccb; 4571 4572 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4573 return (new_ccb); 4574 } 4575 4576 void 4577 xpt_free_ccb(union ccb *free_ccb) 4578 { 4579 free(free_ccb, M_DEVBUF); 4580 } 4581 4582 4583 4584 /* Private XPT functions */ 4585 4586 /* 4587 * Get a CAM control block for the caller. Charge the structure to the device 4588 * referenced by the path. If the this device has no 'credits' then the 4589 * device already has the maximum number of outstanding operations under way 4590 * and we return NULL. If we don't have sufficient resources to allocate more 4591 * ccbs, we also return NULL. 4592 */ 4593 static union ccb * 4594 xpt_get_ccb(struct cam_ed *device) 4595 { 4596 union ccb *new_ccb; 4597 int s; 4598 4599 s = splsoftcam(); 4600 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) { 4601 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4602 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4603 xpt_links.sle); 4604 xpt_ccb_count++; 4605 } 4606 cam_ccbq_take_opening(&device->ccbq); 4607 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4608 splx(s); 4609 return (new_ccb); 4610 } 4611 4612 static void 4613 xpt_release_bus(struct cam_eb *bus) 4614 { 4615 4616 crit_enter(); 4617 if (bus->refcount == 1) { 4618 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL); 4619 TAILQ_REMOVE(&xpt_busses, bus, links); 4620 if (bus->sim) { 4621 cam_sim_release(bus->sim, 0); 4622 bus->sim = NULL; 4623 } 4624 bus_generation++; 4625 KKASSERT(bus->refcount == 1); 4626 free(bus, M_DEVBUF); 4627 } else { 4628 --bus->refcount; 4629 } 4630 crit_exit(); 4631 } 4632 4633 static struct cam_et * 4634 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4635 { 4636 struct cam_et *target; 4637 struct cam_et *cur_target; 4638 4639 target = malloc(sizeof(*target), M_DEVBUF, M_INTWAIT); 4640 4641 TAILQ_INIT(&target->ed_entries); 4642 target->bus = bus; 4643 target->target_id = target_id; 4644 target->refcount = 1; 4645 target->generation = 0; 4646 timevalclear(&target->last_reset); 4647 /* 4648 * Hold a reference to our parent bus so it 4649 * will not go away before we do. 4650 */ 4651 bus->refcount++; 4652 4653 /* Insertion sort into our bus's target list */ 4654 cur_target = TAILQ_FIRST(&bus->et_entries); 4655 while (cur_target != NULL && cur_target->target_id < target_id) 4656 cur_target = TAILQ_NEXT(cur_target, links); 4657 4658 if (cur_target != NULL) { 4659 TAILQ_INSERT_BEFORE(cur_target, target, links); 4660 } else { 4661 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4662 } 4663 bus->generation++; 4664 return (target); 4665 } 4666 4667 static void 4668 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4669 { 4670 crit_enter(); 4671 if (target->refcount == 1) { 4672 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 4673 TAILQ_REMOVE(&bus->et_entries, target, links); 4674 bus->generation++; 4675 xpt_release_bus(bus); 4676 KKASSERT(target->refcount == 1); 4677 free(target, M_DEVBUF); 4678 } else { 4679 --target->refcount; 4680 } 4681 crit_exit(); 4682 } 4683 4684 static struct cam_ed * 4685 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4686 { 4687 struct cam_ed *device; 4688 struct cam_devq *devq; 4689 cam_status status; 4690 4691 /* Make space for us in the device queue on our bus */ 4692 devq = bus->sim->devq; 4693 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4694 4695 if (status != CAM_REQ_CMP) { 4696 device = NULL; 4697 } else { 4698 device = malloc(sizeof(*device), M_DEVBUF, M_INTWAIT); 4699 } 4700 4701 if (device != NULL) { 4702 struct cam_ed *cur_device; 4703 4704 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4705 device->alloc_ccb_entry.device = device; 4706 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4707 device->send_ccb_entry.device = device; 4708 device->target = target; 4709 device->lun_id = lun_id; 4710 /* Initialize our queues */ 4711 if (camq_init(&device->drvq, 0) != 0) { 4712 free(device, M_DEVBUF); 4713 return (NULL); 4714 } 4715 if (cam_ccbq_init(&device->ccbq, 4716 bus->sim->max_dev_openings) != 0) { 4717 camq_fini(&device->drvq); 4718 free(device, M_DEVBUF); 4719 return (NULL); 4720 } 4721 SLIST_INIT(&device->asyncs); 4722 SLIST_INIT(&device->periphs); 4723 device->generation = 0; 4724 device->owner = NULL; 4725 /* 4726 * Take the default quirk entry until we have inquiry 4727 * data and can determine a better quirk to use. 4728 */ 4729 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4730 bzero(&device->inq_data, sizeof(device->inq_data)); 4731 device->inq_flags = 0; 4732 device->queue_flags = 0; 4733 device->serial_num = NULL; 4734 device->serial_num_len = 0; 4735 device->qfrozen_cnt = 0; 4736 device->flags = CAM_DEV_UNCONFIGURED; 4737 device->tag_delay_count = 0; 4738 device->refcount = 1; 4739 callout_init(&device->c_handle); 4740 4741 /* 4742 * Hold a reference to our parent target so it 4743 * will not go away before we do. 4744 */ 4745 target->refcount++; 4746 4747 /* 4748 * XXX should be limited by number of CCBs this bus can 4749 * do. 4750 */ 4751 xpt_max_ccbs += device->ccbq.devq_openings; 4752 /* Insertion sort into our target's device list */ 4753 cur_device = TAILQ_FIRST(&target->ed_entries); 4754 while (cur_device != NULL && cur_device->lun_id < lun_id) 4755 cur_device = TAILQ_NEXT(cur_device, links); 4756 if (cur_device != NULL) { 4757 TAILQ_INSERT_BEFORE(cur_device, device, links); 4758 } else { 4759 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4760 } 4761 target->generation++; 4762 } 4763 return (device); 4764 } 4765 4766 static void 4767 xpt_reference_device(struct cam_ed *device) 4768 { 4769 ++device->refcount; 4770 } 4771 4772 static void 4773 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4774 struct cam_ed *device) 4775 { 4776 struct cam_devq *devq; 4777 4778 crit_enter(); 4779 if (device->refcount == 1) { 4780 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 4781 4782 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4783 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4784 panic("Removing device while still queued for ccbs"); 4785 4786 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4787 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4788 callout_stop(&device->c_handle); 4789 } 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 xpt_release_target(bus, target); 4798 KKASSERT(device->refcount == 1); 4799 free(device, M_DEVBUF); 4800 } else { 4801 --device->refcount; 4802 } 4803 crit_exit(); 4804 } 4805 4806 static u_int32_t 4807 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4808 { 4809 int s; 4810 int diff; 4811 int result; 4812 struct cam_ed *dev; 4813 4814 dev = path->device; 4815 s = splsoftcam(); 4816 4817 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4818 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4819 if (result == CAM_REQ_CMP && (diff < 0)) { 4820 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4821 } 4822 /* Adjust the global limit */ 4823 xpt_max_ccbs += diff; 4824 splx(s); 4825 return (result); 4826 } 4827 4828 static struct cam_eb * 4829 xpt_find_bus(path_id_t path_id) 4830 { 4831 struct cam_eb *bus; 4832 4833 for (bus = TAILQ_FIRST(&xpt_busses); 4834 bus != NULL; 4835 bus = TAILQ_NEXT(bus, links)) { 4836 if (bus->path_id == path_id) { 4837 bus->refcount++; 4838 break; 4839 } 4840 } 4841 return (bus); 4842 } 4843 4844 static struct cam_et * 4845 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4846 { 4847 struct cam_et *target; 4848 4849 for (target = TAILQ_FIRST(&bus->et_entries); 4850 target != NULL; 4851 target = TAILQ_NEXT(target, links)) { 4852 if (target->target_id == target_id) { 4853 target->refcount++; 4854 break; 4855 } 4856 } 4857 return (target); 4858 } 4859 4860 static struct cam_ed * 4861 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4862 { 4863 struct cam_ed *device; 4864 4865 for (device = TAILQ_FIRST(&target->ed_entries); 4866 device != NULL; 4867 device = TAILQ_NEXT(device, links)) { 4868 if (device->lun_id == lun_id) { 4869 device->refcount++; 4870 break; 4871 } 4872 } 4873 return (device); 4874 } 4875 4876 typedef struct { 4877 union ccb *request_ccb; 4878 struct ccb_pathinq *cpi; 4879 int pending_count; 4880 } xpt_scan_bus_info; 4881 4882 /* 4883 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4884 * As the scan progresses, xpt_scan_bus is used as the 4885 * callback on completion function. 4886 */ 4887 static void 4888 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 4889 { 4890 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4891 ("xpt_scan_bus\n")); 4892 switch (request_ccb->ccb_h.func_code) { 4893 case XPT_SCAN_BUS: 4894 { 4895 xpt_scan_bus_info *scan_info; 4896 union ccb *work_ccb; 4897 struct cam_path *path; 4898 u_int i; 4899 u_int max_target; 4900 u_int initiator_id; 4901 4902 /* Find out the characteristics of the bus */ 4903 work_ccb = xpt_alloc_ccb(); 4904 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 4905 request_ccb->ccb_h.pinfo.priority); 4906 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4907 xpt_action(work_ccb); 4908 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4909 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 4910 xpt_free_ccb(work_ccb); 4911 xpt_done(request_ccb); 4912 return; 4913 } 4914 4915 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4916 /* 4917 * Can't scan the bus on an adapter that 4918 * cannot perform the initiator role. 4919 */ 4920 request_ccb->ccb_h.status = CAM_REQ_CMP; 4921 xpt_free_ccb(work_ccb); 4922 xpt_done(request_ccb); 4923 return; 4924 } 4925 4926 /* Save some state for use while we probe for devices */ 4927 scan_info = (xpt_scan_bus_info *) 4928 malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT); 4929 scan_info->request_ccb = request_ccb; 4930 scan_info->cpi = &work_ccb->cpi; 4931 4932 /* Cache on our stack so we can work asynchronously */ 4933 max_target = scan_info->cpi->max_target; 4934 initiator_id = scan_info->cpi->initiator_id; 4935 4936 /* 4937 * Don't count the initiator if the 4938 * initiator is addressable. 4939 */ 4940 scan_info->pending_count = max_target + 1; 4941 if (initiator_id <= max_target) 4942 scan_info->pending_count--; 4943 4944 for (i = 0; i <= max_target; i++) { 4945 cam_status status; 4946 if (i == initiator_id) 4947 continue; 4948 4949 status = xpt_create_path(&path, xpt_periph, 4950 request_ccb->ccb_h.path_id, 4951 i, 0); 4952 if (status != CAM_REQ_CMP) { 4953 printf("xpt_scan_bus: xpt_create_path failed" 4954 " with status %#x, bus scan halted\n", 4955 status); 4956 break; 4957 } 4958 work_ccb = xpt_alloc_ccb(); 4959 xpt_setup_ccb(&work_ccb->ccb_h, path, 4960 request_ccb->ccb_h.pinfo.priority); 4961 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4962 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4963 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 4964 work_ccb->crcn.flags = request_ccb->crcn.flags; 4965 #if 0 4966 printf("xpt_scan_bus: probing %d:%d:%d\n", 4967 request_ccb->ccb_h.path_id, i, 0); 4968 #endif 4969 xpt_action(work_ccb); 4970 } 4971 break; 4972 } 4973 case XPT_SCAN_LUN: 4974 { 4975 xpt_scan_bus_info *scan_info; 4976 path_id_t path_id; 4977 target_id_t target_id; 4978 lun_id_t lun_id; 4979 4980 /* Reuse the same CCB to query if a device was really found */ 4981 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 4982 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 4983 request_ccb->ccb_h.pinfo.priority); 4984 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 4985 4986 path_id = request_ccb->ccb_h.path_id; 4987 target_id = request_ccb->ccb_h.target_id; 4988 lun_id = request_ccb->ccb_h.target_lun; 4989 xpt_action(request_ccb); 4990 4991 #if 0 4992 printf("xpt_scan_bus: got back probe from %d:%d:%d\n", 4993 path_id, target_id, lun_id); 4994 #endif 4995 4996 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 4997 struct cam_ed *device; 4998 struct cam_et *target; 4999 int s, phl; 5000 5001 /* 5002 * If we already probed lun 0 successfully, or 5003 * we have additional configured luns on this 5004 * target that might have "gone away", go onto 5005 * the next lun. 5006 */ 5007 target = request_ccb->ccb_h.path->target; 5008 /* 5009 * We may touch devices that we don't 5010 * hold references too, so ensure they 5011 * don't disappear out from under us. 5012 * The target above is referenced by the 5013 * path in the request ccb. 5014 */ 5015 phl = 0; 5016 s = splcam(); 5017 device = TAILQ_FIRST(&target->ed_entries); 5018 if (device != NULL) { 5019 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 5020 if (device->lun_id == 0) 5021 device = TAILQ_NEXT(device, links); 5022 } 5023 splx(s); 5024 if ((lun_id != 0) || (device != NULL)) { 5025 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5026 lun_id++; 5027 } 5028 } else { 5029 struct cam_ed *device; 5030 5031 device = request_ccb->ccb_h.path->device; 5032 5033 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5034 /* Try the next lun */ 5035 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 5036 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 5037 lun_id++; 5038 } 5039 } 5040 5041 xpt_free_path(request_ccb->ccb_h.path); 5042 5043 /* Check Bounds */ 5044 if ((lun_id == request_ccb->ccb_h.target_lun) 5045 || lun_id > scan_info->cpi->max_lun) { 5046 /* We're done */ 5047 5048 xpt_free_ccb(request_ccb); 5049 scan_info->pending_count--; 5050 if (scan_info->pending_count == 0) { 5051 xpt_free_ccb((union ccb *)scan_info->cpi); 5052 request_ccb = scan_info->request_ccb; 5053 free(scan_info, M_TEMP); 5054 request_ccb->ccb_h.status = CAM_REQ_CMP; 5055 xpt_done(request_ccb); 5056 } 5057 } else { 5058 /* Try the next device */ 5059 struct cam_path *path; 5060 cam_status status; 5061 5062 path = request_ccb->ccb_h.path; 5063 status = xpt_create_path(&path, xpt_periph, 5064 path_id, target_id, lun_id); 5065 if (status != CAM_REQ_CMP) { 5066 printf("xpt_scan_bus: xpt_create_path failed " 5067 "with status %#x, halting LUN scan\n", 5068 status); 5069 xpt_free_ccb(request_ccb); 5070 scan_info->pending_count--; 5071 if (scan_info->pending_count == 0) { 5072 xpt_free_ccb( 5073 (union ccb *)scan_info->cpi); 5074 request_ccb = scan_info->request_ccb; 5075 free(scan_info, M_TEMP); 5076 request_ccb->ccb_h.status = CAM_REQ_CMP; 5077 xpt_done(request_ccb); 5078 break; 5079 } 5080 } 5081 xpt_setup_ccb(&request_ccb->ccb_h, path, 5082 request_ccb->ccb_h.pinfo.priority); 5083 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5084 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5085 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5086 request_ccb->crcn.flags = 5087 scan_info->request_ccb->crcn.flags; 5088 #if 0 5089 xpt_print_path(path); 5090 printf("xpt_scan bus probing\n"); 5091 #endif 5092 xpt_action(request_ccb); 5093 } 5094 break; 5095 } 5096 default: 5097 break; 5098 } 5099 } 5100 5101 typedef enum { 5102 PROBE_TUR, 5103 PROBE_INQUIRY, 5104 PROBE_FULL_INQUIRY, 5105 PROBE_MODE_SENSE, 5106 PROBE_SERIAL_NUM, 5107 PROBE_TUR_FOR_NEGOTIATION 5108 } probe_action; 5109 5110 typedef enum { 5111 PROBE_INQUIRY_CKSUM = 0x01, 5112 PROBE_SERIAL_CKSUM = 0x02, 5113 PROBE_NO_ANNOUNCE = 0x04 5114 } probe_flags; 5115 5116 typedef struct { 5117 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5118 probe_action action; 5119 union ccb saved_ccb; 5120 probe_flags flags; 5121 MD5_CTX context; 5122 u_int8_t digest[16]; 5123 } probe_softc; 5124 5125 static void 5126 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5127 cam_flags flags, union ccb *request_ccb) 5128 { 5129 struct ccb_pathinq cpi; 5130 cam_status status; 5131 struct cam_path *new_path; 5132 struct cam_periph *old_periph; 5133 int s; 5134 5135 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5136 ("xpt_scan_lun\n")); 5137 5138 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5139 cpi.ccb_h.func_code = XPT_PATH_INQ; 5140 xpt_action((union ccb *)&cpi); 5141 5142 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5143 if (request_ccb != NULL) { 5144 request_ccb->ccb_h.status = cpi.ccb_h.status; 5145 xpt_done(request_ccb); 5146 } 5147 return; 5148 } 5149 5150 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5151 /* 5152 * Can't scan the bus on an adapter that 5153 * cannot perform the initiator role. 5154 */ 5155 if (request_ccb != NULL) { 5156 request_ccb->ccb_h.status = CAM_REQ_CMP; 5157 xpt_done(request_ccb); 5158 } 5159 return; 5160 } 5161 5162 if (request_ccb == NULL) { 5163 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_INTWAIT); 5164 new_path = malloc(sizeof(*new_path), M_TEMP, M_INTWAIT); 5165 status = xpt_compile_path(new_path, xpt_periph, 5166 path->bus->path_id, 5167 path->target->target_id, 5168 path->device->lun_id); 5169 5170 if (status != CAM_REQ_CMP) { 5171 xpt_print_path(path); 5172 printf("xpt_scan_lun: can't compile path, can't " 5173 "continue\n"); 5174 free(request_ccb, M_TEMP); 5175 free(new_path, M_TEMP); 5176 return; 5177 } 5178 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5179 request_ccb->ccb_h.cbfcnp = xptscandone; 5180 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5181 request_ccb->crcn.flags = flags; 5182 } 5183 5184 s = splsoftcam(); 5185 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5186 probe_softc *softc; 5187 5188 softc = (probe_softc *)old_periph->softc; 5189 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5190 periph_links.tqe); 5191 } else { 5192 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5193 probestart, "probe", 5194 CAM_PERIPH_BIO, 5195 request_ccb->ccb_h.path, NULL, 0, 5196 request_ccb); 5197 5198 if (status != CAM_REQ_CMP) { 5199 xpt_print_path(path); 5200 printf("xpt_scan_lun: cam_alloc_periph returned an " 5201 "error, can't continue probe\n"); 5202 request_ccb->ccb_h.status = status; 5203 xpt_done(request_ccb); 5204 } 5205 } 5206 splx(s); 5207 } 5208 5209 static void 5210 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5211 { 5212 xpt_release_path(done_ccb->ccb_h.path); 5213 free(done_ccb->ccb_h.path, M_TEMP); 5214 free(done_ccb, M_TEMP); 5215 } 5216 5217 static cam_status 5218 proberegister(struct cam_periph *periph, void *arg) 5219 { 5220 union ccb *request_ccb; /* CCB representing the probe request */ 5221 probe_softc *softc; 5222 5223 request_ccb = (union ccb *)arg; 5224 if (periph == NULL) { 5225 printf("proberegister: periph was NULL!!\n"); 5226 return(CAM_REQ_CMP_ERR); 5227 } 5228 5229 if (request_ccb == NULL) { 5230 printf("proberegister: no probe CCB, " 5231 "can't register device\n"); 5232 return(CAM_REQ_CMP_ERR); 5233 } 5234 5235 softc = malloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO); 5236 TAILQ_INIT(&softc->request_ccbs); 5237 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5238 periph_links.tqe); 5239 softc->flags = 0; 5240 periph->softc = softc; 5241 cam_periph_acquire(periph); 5242 /* 5243 * Ensure we've waited at least a bus settle 5244 * delay before attempting to probe the device. 5245 * For HBAs that don't do bus resets, this won't make a difference. 5246 */ 5247 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5248 SCSI_DELAY); 5249 probeschedule(periph); 5250 return(CAM_REQ_CMP); 5251 } 5252 5253 static void 5254 probeschedule(struct cam_periph *periph) 5255 { 5256 struct ccb_pathinq cpi; 5257 union ccb *ccb; 5258 probe_softc *softc; 5259 5260 softc = (probe_softc *)periph->softc; 5261 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5262 5263 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5264 cpi.ccb_h.func_code = XPT_PATH_INQ; 5265 xpt_action((union ccb *)&cpi); 5266 5267 /* 5268 * If a device has gone away and another device, or the same one, 5269 * is back in the same place, it should have a unit attention 5270 * condition pending. It will not report the unit attention in 5271 * response to an inquiry, which may leave invalid transfer 5272 * negotiations in effect. The TUR will reveal the unit attention 5273 * condition. Only send the TUR for lun 0, since some devices 5274 * will get confused by commands other than inquiry to non-existent 5275 * luns. If you think a device has gone away start your scan from 5276 * lun 0. This will insure that any bogus transfer settings are 5277 * invalidated. 5278 * 5279 * If we haven't seen the device before and the controller supports 5280 * some kind of transfer negotiation, negotiate with the first 5281 * sent command if no bus reset was performed at startup. This 5282 * ensures that the device is not confused by transfer negotiation 5283 * settings left over by loader or BIOS action. 5284 */ 5285 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5286 && (ccb->ccb_h.target_lun == 0)) { 5287 softc->action = PROBE_TUR; 5288 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5289 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5290 proberequestdefaultnegotiation(periph); 5291 softc->action = PROBE_INQUIRY; 5292 } else { 5293 softc->action = PROBE_INQUIRY; 5294 } 5295 5296 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5297 softc->flags |= PROBE_NO_ANNOUNCE; 5298 else 5299 softc->flags &= ~PROBE_NO_ANNOUNCE; 5300 5301 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5302 } 5303 5304 static void 5305 probestart(struct cam_periph *periph, union ccb *start_ccb) 5306 { 5307 /* Probe the device that our peripheral driver points to */ 5308 struct ccb_scsiio *csio; 5309 probe_softc *softc; 5310 5311 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5312 5313 softc = (probe_softc *)periph->softc; 5314 csio = &start_ccb->csio; 5315 5316 switch (softc->action) { 5317 case PROBE_TUR: 5318 case PROBE_TUR_FOR_NEGOTIATION: 5319 { 5320 scsi_test_unit_ready(csio, 5321 /*retries*/4, 5322 probedone, 5323 MSG_SIMPLE_Q_TAG, 5324 SSD_FULL_SIZE, 5325 /*timeout*/60000); 5326 break; 5327 } 5328 case PROBE_INQUIRY: 5329 case PROBE_FULL_INQUIRY: 5330 { 5331 u_int inquiry_len; 5332 struct scsi_inquiry_data *inq_buf; 5333 5334 inq_buf = &periph->path->device->inq_data; 5335 /* 5336 * If the device is currently configured, we calculate an 5337 * MD5 checksum of the inquiry data, and if the serial number 5338 * length is greater than 0, add the serial number data 5339 * into the checksum as well. Once the inquiry and the 5340 * serial number check finish, we attempt to figure out 5341 * whether we still have the same device. 5342 */ 5343 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5344 5345 MD5Init(&softc->context); 5346 MD5Update(&softc->context, (unsigned char *)inq_buf, 5347 sizeof(struct scsi_inquiry_data)); 5348 softc->flags |= PROBE_INQUIRY_CKSUM; 5349 if (periph->path->device->serial_num_len > 0) { 5350 MD5Update(&softc->context, 5351 periph->path->device->serial_num, 5352 periph->path->device->serial_num_len); 5353 softc->flags |= PROBE_SERIAL_CKSUM; 5354 } 5355 MD5Final(softc->digest, &softc->context); 5356 } 5357 5358 if (softc->action == PROBE_INQUIRY) 5359 inquiry_len = SHORT_INQUIRY_LENGTH; 5360 else 5361 inquiry_len = inq_buf->additional_length + 5; 5362 5363 scsi_inquiry(csio, 5364 /*retries*/4, 5365 probedone, 5366 MSG_SIMPLE_Q_TAG, 5367 (u_int8_t *)inq_buf, 5368 inquiry_len, 5369 /*evpd*/FALSE, 5370 /*page_code*/0, 5371 SSD_MIN_SIZE, 5372 /*timeout*/60 * 1000); 5373 break; 5374 } 5375 case PROBE_MODE_SENSE: 5376 { 5377 void *mode_buf; 5378 int mode_buf_len; 5379 5380 mode_buf_len = sizeof(struct scsi_mode_header_6) 5381 + sizeof(struct scsi_mode_blk_desc) 5382 + sizeof(struct scsi_control_page); 5383 mode_buf = malloc(mode_buf_len, M_TEMP, M_INTWAIT); 5384 scsi_mode_sense(csio, 5385 /*retries*/4, 5386 probedone, 5387 MSG_SIMPLE_Q_TAG, 5388 /*dbd*/FALSE, 5389 SMS_PAGE_CTRL_CURRENT, 5390 SMS_CONTROL_MODE_PAGE, 5391 mode_buf, 5392 mode_buf_len, 5393 SSD_FULL_SIZE, 5394 /*timeout*/60000); 5395 break; 5396 } 5397 case PROBE_SERIAL_NUM: 5398 { 5399 struct scsi_vpd_unit_serial_number *serial_buf; 5400 struct cam_ed* device; 5401 5402 serial_buf = NULL; 5403 device = periph->path->device; 5404 device->serial_num = NULL; 5405 device->serial_num_len = 0; 5406 5407 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5408 serial_buf = malloc(sizeof(*serial_buf), M_TEMP, 5409 M_INTWAIT | M_ZERO); 5410 scsi_inquiry(csio, 5411 /*retries*/4, 5412 probedone, 5413 MSG_SIMPLE_Q_TAG, 5414 (u_int8_t *)serial_buf, 5415 sizeof(*serial_buf), 5416 /*evpd*/TRUE, 5417 SVPD_UNIT_SERIAL_NUMBER, 5418 SSD_MIN_SIZE, 5419 /*timeout*/60 * 1000); 5420 break; 5421 } 5422 /* 5423 * We'll have to do without, let our probedone 5424 * routine finish up for us. 5425 */ 5426 start_ccb->csio.data_ptr = NULL; 5427 probedone(periph, start_ccb); 5428 return; 5429 } 5430 } 5431 xpt_action(start_ccb); 5432 } 5433 5434 static void 5435 proberequestdefaultnegotiation(struct cam_periph *periph) 5436 { 5437 struct ccb_trans_settings cts; 5438 5439 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5440 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5441 cts.flags = CCB_TRANS_USER_SETTINGS; 5442 xpt_action((union ccb *)&cts); 5443 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5444 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5445 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5446 xpt_action((union ccb *)&cts); 5447 } 5448 5449 static void 5450 probedone(struct cam_periph *periph, union ccb *done_ccb) 5451 { 5452 probe_softc *softc; 5453 struct cam_path *path; 5454 u_int32_t priority; 5455 5456 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5457 5458 softc = (probe_softc *)periph->softc; 5459 path = done_ccb->ccb_h.path; 5460 priority = done_ccb->ccb_h.pinfo.priority; 5461 5462 switch (softc->action) { 5463 case PROBE_TUR: 5464 { 5465 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5466 5467 if (cam_periph_error(done_ccb, 0, 5468 SF_NO_PRINT, NULL) == ERESTART) 5469 return; 5470 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5471 /* Don't wedge the queue */ 5472 xpt_release_devq(done_ccb->ccb_h.path, 5473 /*count*/1, 5474 /*run_queue*/TRUE); 5475 } 5476 softc->action = PROBE_INQUIRY; 5477 xpt_release_ccb(done_ccb); 5478 xpt_schedule(periph, priority); 5479 return; 5480 } 5481 case PROBE_INQUIRY: 5482 case PROBE_FULL_INQUIRY: 5483 { 5484 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5485 struct scsi_inquiry_data *inq_buf; 5486 u_int8_t periph_qual; 5487 5488 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5489 inq_buf = &path->device->inq_data; 5490 5491 periph_qual = SID_QUAL(inq_buf); 5492 5493 switch(periph_qual) { 5494 case SID_QUAL_LU_CONNECTED: 5495 { 5496 u_int8_t alen; 5497 5498 /* 5499 * We conservatively request only 5500 * SHORT_INQUIRY_LEN bytes of inquiry 5501 * information during our first try 5502 * at sending an INQUIRY. If the device 5503 * has more information to give, 5504 * perform a second request specifying 5505 * the amount of information the device 5506 * is willing to give. 5507 */ 5508 alen = inq_buf->additional_length; 5509 if (softc->action == PROBE_INQUIRY 5510 && alen > (SHORT_INQUIRY_LENGTH - 5)) { 5511 softc->action = PROBE_FULL_INQUIRY; 5512 xpt_release_ccb(done_ccb); 5513 xpt_schedule(periph, priority); 5514 return; 5515 } 5516 5517 xpt_find_quirk(path->device); 5518 5519 if ((inq_buf->flags & SID_CmdQue) != 0) 5520 softc->action = PROBE_MODE_SENSE; 5521 else 5522 softc->action = PROBE_SERIAL_NUM; 5523 5524 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5525 xpt_reference_device(path->device); 5526 5527 xpt_release_ccb(done_ccb); 5528 xpt_schedule(periph, priority); 5529 return; 5530 } 5531 default: 5532 break; 5533 } 5534 } else if (cam_periph_error(done_ccb, 0, 5535 done_ccb->ccb_h.target_lun > 0 5536 ? SF_RETRY_UA|SF_QUIET_IR 5537 : SF_RETRY_UA, 5538 &softc->saved_ccb) == ERESTART) { 5539 return; 5540 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5541 /* Don't wedge the queue */ 5542 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5543 /*run_queue*/TRUE); 5544 } 5545 /* 5546 * If we get to this point, we got an error status back 5547 * from the inquiry and the error status doesn't require 5548 * automatically retrying the command. Therefore, the 5549 * inquiry failed. If we had inquiry information before 5550 * for this device, but this latest inquiry command failed, 5551 * the device has probably gone away. If this device isn't 5552 * already marked unconfigured, notify the peripheral 5553 * drivers that this device is no more. 5554 */ 5555 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5556 /* Send the async notification. */ 5557 xpt_async(AC_LOST_DEVICE, path, NULL); 5558 } 5559 5560 xpt_release_ccb(done_ccb); 5561 break; 5562 } 5563 case PROBE_MODE_SENSE: 5564 { 5565 struct ccb_scsiio *csio; 5566 struct scsi_mode_header_6 *mode_hdr; 5567 5568 csio = &done_ccb->csio; 5569 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5570 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5571 struct scsi_control_page *page; 5572 u_int8_t *offset; 5573 5574 offset = ((u_int8_t *)&mode_hdr[1]) 5575 + mode_hdr->blk_desc_len; 5576 page = (struct scsi_control_page *)offset; 5577 path->device->queue_flags = page->queue_flags; 5578 } else if (cam_periph_error(done_ccb, 0, 5579 SF_RETRY_UA|SF_NO_PRINT, 5580 &softc->saved_ccb) == ERESTART) { 5581 return; 5582 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5583 /* Don't wedge the queue */ 5584 xpt_release_devq(done_ccb->ccb_h.path, 5585 /*count*/1, /*run_queue*/TRUE); 5586 } 5587 xpt_release_ccb(done_ccb); 5588 free(mode_hdr, M_TEMP); 5589 softc->action = PROBE_SERIAL_NUM; 5590 xpt_schedule(periph, priority); 5591 return; 5592 } 5593 case PROBE_SERIAL_NUM: 5594 { 5595 struct ccb_scsiio *csio; 5596 struct scsi_vpd_unit_serial_number *serial_buf; 5597 u_int32_t priority; 5598 int changed; 5599 int have_serialnum; 5600 5601 changed = 1; 5602 have_serialnum = 0; 5603 csio = &done_ccb->csio; 5604 priority = done_ccb->ccb_h.pinfo.priority; 5605 serial_buf = 5606 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5607 5608 /* Clean up from previous instance of this device */ 5609 if (path->device->serial_num != NULL) { 5610 free(path->device->serial_num, M_DEVBUF); 5611 path->device->serial_num = NULL; 5612 path->device->serial_num_len = 0; 5613 } 5614 5615 if (serial_buf == NULL) { 5616 /* 5617 * Don't process the command as it was never sent 5618 */ 5619 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5620 && (serial_buf->length > 0)) { 5621 5622 have_serialnum = 1; 5623 path->device->serial_num = 5624 malloc((serial_buf->length + 1), 5625 M_DEVBUF, M_INTWAIT); 5626 bcopy(serial_buf->serial_num, 5627 path->device->serial_num, 5628 serial_buf->length); 5629 path->device->serial_num_len = serial_buf->length; 5630 path->device->serial_num[serial_buf->length] = '\0'; 5631 } else if (cam_periph_error(done_ccb, 0, 5632 SF_RETRY_UA|SF_NO_PRINT, 5633 &softc->saved_ccb) == ERESTART) { 5634 return; 5635 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5636 /* Don't wedge the queue */ 5637 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5638 /*run_queue*/TRUE); 5639 } 5640 5641 /* 5642 * Let's see if we have seen this device before. 5643 */ 5644 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5645 MD5_CTX context; 5646 u_int8_t digest[16]; 5647 5648 MD5Init(&context); 5649 5650 MD5Update(&context, 5651 (unsigned char *)&path->device->inq_data, 5652 sizeof(struct scsi_inquiry_data)); 5653 5654 if (have_serialnum) 5655 MD5Update(&context, serial_buf->serial_num, 5656 serial_buf->length); 5657 5658 MD5Final(digest, &context); 5659 if (bcmp(softc->digest, digest, 16) == 0) 5660 changed = 0; 5661 5662 /* 5663 * XXX Do we need to do a TUR in order to ensure 5664 * that the device really hasn't changed??? 5665 */ 5666 if ((changed != 0) 5667 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5668 xpt_async(AC_LOST_DEVICE, path, NULL); 5669 } 5670 if (serial_buf != NULL) 5671 free(serial_buf, M_TEMP); 5672 5673 if (changed != 0) { 5674 /* 5675 * Now that we have all the necessary 5676 * information to safely perform transfer 5677 * negotiations... Controllers don't perform 5678 * any negotiation or tagged queuing until 5679 * after the first XPT_SET_TRAN_SETTINGS ccb is 5680 * received. So, on a new device, just retreive 5681 * the user settings, and set them as the current 5682 * settings to set the device up. 5683 */ 5684 proberequestdefaultnegotiation(periph); 5685 xpt_release_ccb(done_ccb); 5686 5687 /* 5688 * Perform a TUR to allow the controller to 5689 * perform any necessary transfer negotiation. 5690 */ 5691 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5692 xpt_schedule(periph, priority); 5693 return; 5694 } 5695 xpt_release_ccb(done_ccb); 5696 break; 5697 } 5698 case PROBE_TUR_FOR_NEGOTIATION: 5699 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5700 /* Don't wedge the queue */ 5701 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5702 /*run_queue*/TRUE); 5703 } 5704 5705 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5706 xpt_reference_device(path->device); 5707 5708 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5709 /* Inform the XPT that a new device has been found */ 5710 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5711 xpt_action(done_ccb); 5712 5713 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5714 } 5715 xpt_release_ccb(done_ccb); 5716 break; 5717 } 5718 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5719 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5720 done_ccb->ccb_h.status = CAM_REQ_CMP; 5721 xpt_done(done_ccb); 5722 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5723 cam_periph_invalidate(periph); 5724 cam_periph_release(periph); 5725 } else { 5726 probeschedule(periph); 5727 } 5728 } 5729 5730 static void 5731 probecleanup(struct cam_periph *periph) 5732 { 5733 free(periph->softc, M_TEMP); 5734 } 5735 5736 static void 5737 xpt_find_quirk(struct cam_ed *device) 5738 { 5739 caddr_t match; 5740 5741 match = cam_quirkmatch((caddr_t)&device->inq_data, 5742 (caddr_t)xpt_quirk_table, 5743 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5744 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5745 5746 if (match == NULL) 5747 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5748 5749 device->quirk = (struct xpt_quirk_entry *)match; 5750 } 5751 5752 static void 5753 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5754 int async_update) 5755 { 5756 struct cam_sim *sim; 5757 int qfrozen; 5758 5759 sim = cts->ccb_h.path->bus->sim; 5760 if (async_update == FALSE) { 5761 struct scsi_inquiry_data *inq_data; 5762 struct ccb_pathinq cpi; 5763 struct ccb_trans_settings cur_cts; 5764 5765 if (device == NULL) { 5766 cts->ccb_h.status = CAM_PATH_INVALID; 5767 xpt_done((union ccb *)cts); 5768 return; 5769 } 5770 5771 /* 5772 * Perform sanity checking against what the 5773 * controller and device can do. 5774 */ 5775 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 5776 cpi.ccb_h.func_code = XPT_PATH_INQ; 5777 xpt_action((union ccb *)&cpi); 5778 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 5779 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5780 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 5781 xpt_action((union ccb *)&cur_cts); 5782 inq_data = &device->inq_data; 5783 5784 /* Fill in any gaps in what the user gave us */ 5785 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 5786 cts->sync_period = cur_cts.sync_period; 5787 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 5788 cts->sync_offset = cur_cts.sync_offset; 5789 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 5790 cts->bus_width = cur_cts.bus_width; 5791 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 5792 cts->flags &= ~CCB_TRANS_DISC_ENB; 5793 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 5794 } 5795 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 5796 cts->flags &= ~CCB_TRANS_TAG_ENB; 5797 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 5798 } 5799 5800 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 5801 && (inq_data->flags & SID_Sync) == 0) 5802 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 5803 || (cts->sync_offset == 0) 5804 || (cts->sync_period == 0)) { 5805 /* Force async */ 5806 cts->sync_period = 0; 5807 cts->sync_offset = 0; 5808 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) { 5809 5810 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 5811 && cts->sync_period <= 0x9) { 5812 /* 5813 * Don't allow DT transmission rates if the 5814 * device does not support it. 5815 */ 5816 cts->sync_period = 0xa; 5817 } 5818 if ((inq_data->spi3data & SID_SPI_IUS) == 0 5819 && cts->sync_period <= 0x8) { 5820 /* 5821 * Don't allow PACE transmission rates 5822 * if the device does support packetized 5823 * transfers. 5824 */ 5825 cts->sync_period = 0x9; 5826 } 5827 } 5828 5829 switch (cts->bus_width) { 5830 case MSG_EXT_WDTR_BUS_32_BIT: 5831 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5832 || (inq_data->flags & SID_WBus32) != 0) 5833 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 5834 break; 5835 /* Fall Through to 16-bit */ 5836 case MSG_EXT_WDTR_BUS_16_BIT: 5837 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5838 || (inq_data->flags & SID_WBus16) != 0) 5839 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 5840 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 5841 break; 5842 } 5843 /* Fall Through to 8-bit */ 5844 default: /* New bus width?? */ 5845 case MSG_EXT_WDTR_BUS_8_BIT: 5846 /* All targets can do this */ 5847 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 5848 break; 5849 } 5850 5851 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 5852 /* 5853 * Can't tag queue without disconnection. 5854 */ 5855 cts->flags &= ~CCB_TRANS_TAG_ENB; 5856 cts->valid |= CCB_TRANS_TQ_VALID; 5857 } 5858 5859 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 5860 || (inq_data->flags & SID_CmdQue) == 0 5861 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 5862 || (device->quirk->mintags == 0)) { 5863 /* 5864 * Can't tag on hardware that doesn't support, 5865 * doesn't have it enabled, or has broken tag support. 5866 */ 5867 cts->flags &= ~CCB_TRANS_TAG_ENB; 5868 } 5869 } 5870 5871 qfrozen = FALSE; 5872 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 5873 int device_tagenb; 5874 5875 /* 5876 * If we are transitioning from tags to no-tags or 5877 * vice-versa, we need to carefully freeze and restart 5878 * the queue so that we don't overlap tagged and non-tagged 5879 * commands. We also temporarily stop tags if there is 5880 * a change in transfer negotiation settings to allow 5881 * "tag-less" negotiation. 5882 */ 5883 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5884 || (device->inq_flags & SID_CmdQue) != 0) 5885 device_tagenb = TRUE; 5886 else 5887 device_tagenb = FALSE; 5888 5889 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 5890 && device_tagenb == FALSE) 5891 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 5892 && device_tagenb == TRUE)) { 5893 5894 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 5895 /* 5896 * Delay change to use tags until after a 5897 * few commands have gone to this device so 5898 * the controller has time to perform transfer 5899 * negotiations without tagged messages getting 5900 * in the way. 5901 */ 5902 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 5903 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 5904 } else { 5905 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 5906 qfrozen = TRUE; 5907 device->inq_flags &= ~SID_CmdQue; 5908 xpt_dev_ccbq_resize(cts->ccb_h.path, 5909 sim->max_dev_openings); 5910 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5911 device->tag_delay_count = 0; 5912 } 5913 } 5914 } 5915 5916 if (async_update == FALSE) { 5917 /* 5918 * If we are currently performing tagged transactions to 5919 * this device and want to change its negotiation parameters, 5920 * go non-tagged for a bit to give the controller a chance to 5921 * negotiate unhampered by tag messages. 5922 */ 5923 if ((device->inq_flags & SID_CmdQue) != 0 5924 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 5925 CCB_TRANS_SYNC_OFFSET_VALID| 5926 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 5927 xpt_toggle_tags(cts->ccb_h.path); 5928 5929 (*(sim->sim_action))(sim, (union ccb *)cts); 5930 } 5931 5932 if (qfrozen) { 5933 struct ccb_relsim crs; 5934 5935 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 5936 /*priority*/1); 5937 crs.ccb_h.func_code = XPT_REL_SIMQ; 5938 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5939 crs.openings 5940 = crs.release_timeout 5941 = crs.qfrozen_cnt 5942 = 0; 5943 xpt_action((union ccb *)&crs); 5944 } 5945 } 5946 5947 static void 5948 xpt_toggle_tags(struct cam_path *path) 5949 { 5950 struct cam_ed *dev; 5951 5952 /* 5953 * Give controllers a chance to renegotiate 5954 * before starting tag operations. We 5955 * "toggle" tagged queuing off then on 5956 * which causes the tag enable command delay 5957 * counter to come into effect. 5958 */ 5959 dev = path->device; 5960 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5961 || ((dev->inq_flags & SID_CmdQue) != 0 5962 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 5963 struct ccb_trans_settings cts; 5964 5965 xpt_setup_ccb(&cts.ccb_h, path, 1); 5966 cts.flags = 0; 5967 cts.valid = CCB_TRANS_TQ_VALID; 5968 xpt_set_transfer_settings(&cts, path->device, 5969 /*async_update*/TRUE); 5970 cts.flags = CCB_TRANS_TAG_ENB; 5971 xpt_set_transfer_settings(&cts, path->device, 5972 /*async_update*/TRUE); 5973 } 5974 } 5975 5976 static void 5977 xpt_start_tags(struct cam_path *path) 5978 { 5979 struct ccb_relsim crs; 5980 struct cam_ed *device; 5981 struct cam_sim *sim; 5982 int newopenings; 5983 5984 device = path->device; 5985 sim = path->bus->sim; 5986 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5987 xpt_freeze_devq(path, /*count*/1); 5988 device->inq_flags |= SID_CmdQue; 5989 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 5990 xpt_dev_ccbq_resize(path, newopenings); 5991 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 5992 crs.ccb_h.func_code = XPT_REL_SIMQ; 5993 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5994 crs.openings 5995 = crs.release_timeout 5996 = crs.qfrozen_cnt 5997 = 0; 5998 xpt_action((union ccb *)&crs); 5999 } 6000 6001 static int busses_to_config; 6002 static int busses_to_reset; 6003 6004 static int 6005 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6006 { 6007 if (bus->path_id != CAM_XPT_PATH_ID) { 6008 struct cam_path path; 6009 struct ccb_pathinq cpi; 6010 int can_negotiate; 6011 6012 busses_to_config++; 6013 xpt_compile_path(&path, NULL, bus->path_id, 6014 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6015 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6016 cpi.ccb_h.func_code = XPT_PATH_INQ; 6017 xpt_action((union ccb *)&cpi); 6018 can_negotiate = cpi.hba_inquiry; 6019 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6020 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6021 && can_negotiate) 6022 busses_to_reset++; 6023 xpt_release_path(&path); 6024 } 6025 6026 return(1); 6027 } 6028 6029 static int 6030 xptconfigfunc(struct cam_eb *bus, void *arg) 6031 { 6032 struct cam_path *path; 6033 union ccb *work_ccb; 6034 6035 if (bus->path_id != CAM_XPT_PATH_ID) { 6036 cam_status status; 6037 int can_negotiate; 6038 6039 work_ccb = xpt_alloc_ccb(); 6040 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6041 CAM_TARGET_WILDCARD, 6042 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6043 printf("xptconfigfunc: xpt_create_path failed with " 6044 "status %#x for bus %d\n", status, bus->path_id); 6045 printf("xptconfigfunc: halting bus configuration\n"); 6046 xpt_free_ccb(work_ccb); 6047 busses_to_config--; 6048 xpt_finishconfig(xpt_periph, NULL); 6049 return(0); 6050 } 6051 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6052 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6053 xpt_action(work_ccb); 6054 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6055 printf("xptconfigfunc: CPI failed on bus %d " 6056 "with status %d\n", bus->path_id, 6057 work_ccb->ccb_h.status); 6058 xpt_finishconfig(xpt_periph, work_ccb); 6059 return(1); 6060 } 6061 6062 can_negotiate = work_ccb->cpi.hba_inquiry; 6063 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6064 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6065 && (can_negotiate != 0)) { 6066 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6067 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6068 work_ccb->ccb_h.cbfcnp = NULL; 6069 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6070 ("Resetting Bus\n")); 6071 xpt_action(work_ccb); 6072 xpt_finishconfig(xpt_periph, work_ccb); 6073 } else { 6074 /* Act as though we performed a successful BUS RESET */ 6075 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6076 xpt_finishconfig(xpt_periph, work_ccb); 6077 } 6078 } 6079 6080 return(1); 6081 } 6082 6083 static void 6084 xpt_config(void *arg) 6085 { 6086 /* Now that interrupts are enabled, go find our devices */ 6087 6088 #ifdef CAMDEBUG 6089 /* Setup debugging flags and path */ 6090 #ifdef CAM_DEBUG_FLAGS 6091 cam_dflags = CAM_DEBUG_FLAGS; 6092 #else /* !CAM_DEBUG_FLAGS */ 6093 cam_dflags = CAM_DEBUG_NONE; 6094 #endif /* CAM_DEBUG_FLAGS */ 6095 #ifdef CAM_DEBUG_BUS 6096 if (cam_dflags != CAM_DEBUG_NONE) { 6097 if (xpt_create_path(&cam_dpath, xpt_periph, 6098 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6099 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6100 printf("xpt_config: xpt_create_path() failed for debug" 6101 " target %d:%d:%d, debugging disabled\n", 6102 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6103 cam_dflags = CAM_DEBUG_NONE; 6104 } 6105 } else 6106 cam_dpath = NULL; 6107 #else /* !CAM_DEBUG_BUS */ 6108 cam_dpath = NULL; 6109 #endif /* CAM_DEBUG_BUS */ 6110 #endif /* CAMDEBUG */ 6111 6112 /* 6113 * Scan all installed busses. 6114 */ 6115 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6116 6117 if (busses_to_config == 0) { 6118 /* Call manually because we don't have any busses */ 6119 xpt_finishconfig(xpt_periph, NULL); 6120 } else { 6121 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) { 6122 printf("Waiting %d seconds for SCSI " 6123 "devices to settle\n", SCSI_DELAY/1000); 6124 } 6125 xpt_for_all_busses(xptconfigfunc, NULL); 6126 } 6127 } 6128 6129 /* 6130 * If the given device only has one peripheral attached to it, and if that 6131 * peripheral is the passthrough driver, announce it. This insures that the 6132 * user sees some sort of announcement for every peripheral in their system. 6133 */ 6134 static int 6135 xptpassannouncefunc(struct cam_ed *device, void *arg) 6136 { 6137 struct cam_periph *periph; 6138 int i; 6139 6140 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6141 periph = SLIST_NEXT(periph, periph_links), i++); 6142 6143 periph = SLIST_FIRST(&device->periphs); 6144 if ((i == 1) 6145 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6146 xpt_announce_periph(periph, NULL); 6147 6148 return(1); 6149 } 6150 6151 static void 6152 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6153 { 6154 struct periph_driver **p_drv; 6155 6156 if (done_ccb != NULL) { 6157 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6158 ("xpt_finishconfig\n")); 6159 switch(done_ccb->ccb_h.func_code) { 6160 case XPT_RESET_BUS: 6161 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6162 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6163 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6164 xpt_action(done_ccb); 6165 return; 6166 } 6167 /* FALLTHROUGH */ 6168 case XPT_SCAN_BUS: 6169 default: 6170 xpt_free_path(done_ccb->ccb_h.path); 6171 busses_to_config--; 6172 break; 6173 } 6174 } 6175 6176 if (busses_to_config == 0) { 6177 /* Register all the peripheral drivers */ 6178 /* XXX This will have to change when we have loadable modules */ 6179 SET_FOREACH(p_drv, periphdriver_set) { 6180 (*p_drv)->init(); 6181 } 6182 6183 /* 6184 * Check for devices with no "standard" peripheral driver 6185 * attached. For any devices like that, announce the 6186 * passthrough driver so the user will see something. 6187 */ 6188 xpt_for_all_devices(xptpassannouncefunc, NULL); 6189 6190 /* Release our hook so that the boot can continue. */ 6191 config_intrhook_disestablish(xpt_config_hook); 6192 free(xpt_config_hook, M_TEMP); 6193 xpt_config_hook = NULL; 6194 } 6195 if (done_ccb != NULL) 6196 xpt_free_ccb(done_ccb); 6197 } 6198 6199 static void 6200 xptaction(struct cam_sim *sim, union ccb *work_ccb) 6201 { 6202 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6203 6204 switch (work_ccb->ccb_h.func_code) { 6205 /* Common cases first */ 6206 case XPT_PATH_INQ: /* Path routing inquiry */ 6207 { 6208 struct ccb_pathinq *cpi; 6209 6210 cpi = &work_ccb->cpi; 6211 cpi->version_num = 1; /* XXX??? */ 6212 cpi->hba_inquiry = 0; 6213 cpi->target_sprt = 0; 6214 cpi->hba_misc = 0; 6215 cpi->hba_eng_cnt = 0; 6216 cpi->max_target = 0; 6217 cpi->max_lun = 0; 6218 cpi->initiator_id = 0; 6219 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6220 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6221 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6222 cpi->unit_number = sim->unit_number; 6223 cpi->bus_id = sim->bus_id; 6224 cpi->base_transfer_speed = 0; 6225 cpi->ccb_h.status = CAM_REQ_CMP; 6226 xpt_done(work_ccb); 6227 break; 6228 } 6229 default: 6230 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6231 xpt_done(work_ccb); 6232 break; 6233 } 6234 } 6235 6236 /* 6237 * The xpt as a "controller" has no interrupt sources, so polling 6238 * is a no-op. 6239 */ 6240 static void 6241 xptpoll(struct cam_sim *sim) 6242 { 6243 } 6244 6245 /* 6246 * Should only be called by the machine interrupt dispatch routines, 6247 * so put these prototypes here instead of in the header. 6248 */ 6249 6250 static void 6251 swi_camnet(void *arg) 6252 { 6253 camisr(&cam_netq); 6254 } 6255 6256 static void 6257 swi_cambio(void *arg) 6258 { 6259 camisr(&cam_bioq); 6260 } 6261 6262 static void 6263 camisr(cam_isrq_t *queue) 6264 { 6265 int s; 6266 struct ccb_hdr *ccb_h; 6267 6268 s = splcam(); 6269 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6270 int runq; 6271 6272 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6273 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6274 splx(s); 6275 6276 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6277 ("camisr\n")); 6278 6279 runq = FALSE; 6280 6281 if (ccb_h->flags & CAM_HIGH_POWER) { 6282 struct highpowerlist *hphead; 6283 struct cam_ed *device; 6284 union ccb *send_ccb; 6285 6286 hphead = &highpowerq; 6287 6288 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6289 6290 /* 6291 * Increment the count since this command is done. 6292 */ 6293 num_highpower++; 6294 6295 /* 6296 * Any high powered commands queued up? 6297 */ 6298 if (send_ccb != NULL) { 6299 device = send_ccb->ccb_h.path->device; 6300 6301 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6302 6303 xpt_release_devq(send_ccb->ccb_h.path, 6304 /*count*/1, /*runqueue*/TRUE); 6305 } 6306 } 6307 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6308 struct cam_ed *dev; 6309 6310 dev = ccb_h->path->device; 6311 6312 s = splcam(); 6313 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6314 6315 ccb_h->path->bus->sim->devq->send_active--; 6316 ccb_h->path->bus->sim->devq->send_openings++; 6317 splx(s); 6318 6319 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6320 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6321 && (dev->ccbq.dev_active == 0))) { 6322 6323 xpt_release_devq(ccb_h->path, /*count*/1, 6324 /*run_queue*/TRUE); 6325 } 6326 6327 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6328 && (--dev->tag_delay_count == 0)) 6329 xpt_start_tags(ccb_h->path); 6330 6331 if ((dev->ccbq.queue.entries > 0) 6332 && (dev->qfrozen_cnt == 0) 6333 && (device_is_send_queued(dev) == 0)) { 6334 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6335 dev); 6336 } 6337 } 6338 6339 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6340 xpt_release_simq(ccb_h->path->bus->sim, 6341 /*run_queue*/TRUE); 6342 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6343 runq = FALSE; 6344 } 6345 6346 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6347 && (ccb_h->status & CAM_DEV_QFRZN)) { 6348 xpt_release_devq(ccb_h->path, /*count*/1, 6349 /*run_queue*/TRUE); 6350 ccb_h->status &= ~CAM_DEV_QFRZN; 6351 } else if (runq) { 6352 xpt_run_dev_sendq(ccb_h->path->bus); 6353 } 6354 6355 /* Call the peripheral driver's callback */ 6356 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6357 6358 /* Raise IPL for while test */ 6359 s = splcam(); 6360 } 6361 splx(s); 6362 } 6363