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 1.34 2006/12/22 23:12:16 swildner Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/md5.h> 42 #include <sys/devicestat.h> 43 #include <sys/interrupt.h> 44 #include <sys/bus.h> 45 #include <sys/thread.h> 46 #include <sys/thread2.h> 47 48 #include <machine/clock.h> 49 50 #include "cam.h" 51 #include "cam_ccb.h" 52 #include "cam_periph.h" 53 #include "cam_sim.h" 54 #include "cam_xpt.h" 55 #include "cam_xpt_sim.h" 56 #include "cam_xpt_periph.h" 57 #include "cam_debug.h" 58 59 #include "scsi/scsi_all.h" 60 #include "scsi/scsi_message.h" 61 #include "scsi/scsi_pass.h" 62 #include "opt_cam.h" 63 64 /* Datastructures internal to the xpt layer */ 65 66 /* 67 * Definition of an async handler callback block. These are used to add 68 * SIMs and peripherals to the async callback lists. 69 */ 70 struct async_node { 71 SLIST_ENTRY(async_node) links; 72 u_int32_t event_enable; /* Async Event enables */ 73 void (*callback)(void *arg, u_int32_t code, 74 struct cam_path *path, void *args); 75 void *callback_arg; 76 }; 77 78 SLIST_HEAD(async_list, async_node); 79 SLIST_HEAD(periph_list, cam_periph); 80 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 81 82 /* 83 * This is the maximum number of high powered commands (e.g. start unit) 84 * that can be outstanding at a particular time. 85 */ 86 #ifndef CAM_MAX_HIGHPOWER 87 #define CAM_MAX_HIGHPOWER 4 88 #endif 89 90 /* number of high powered commands that can go through right now */ 91 static int num_highpower = CAM_MAX_HIGHPOWER; 92 93 /* 94 * Structure for queueing a device in a run queue. 95 * There is one run queue for allocating new ccbs, 96 * and another for sending ccbs to the controller. 97 */ 98 struct cam_ed_qinfo { 99 cam_pinfo pinfo; 100 struct cam_ed *device; 101 }; 102 103 /* 104 * The CAM EDT (Existing Device Table) contains the device information for 105 * all devices for all busses in the system. The table contains a 106 * cam_ed structure for each device on the bus. 107 */ 108 struct cam_ed { 109 TAILQ_ENTRY(cam_ed) links; 110 struct cam_ed_qinfo alloc_ccb_entry; 111 struct cam_ed_qinfo send_ccb_entry; 112 struct cam_et *target; 113 lun_id_t lun_id; 114 struct camq drvq; /* 115 * Queue of type drivers wanting to do 116 * work on this device. 117 */ 118 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 119 struct async_list asyncs; /* Async callback info for this B/T/L */ 120 struct periph_list periphs; /* All attached devices */ 121 u_int generation; /* Generation number */ 122 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 123 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 124 /* Storage for the inquiry data */ 125 struct scsi_inquiry_data inq_data; 126 u_int8_t inq_flags; /* 127 * Current settings for inquiry flags. 128 * This allows us to override settings 129 * like disconnection and tagged 130 * queuing for a device. 131 */ 132 u_int8_t queue_flags; /* Queue flags from the control page */ 133 u_int8_t serial_num_len; 134 u_int8_t *serial_num; 135 u_int32_t qfrozen_cnt; 136 u_int32_t flags; 137 #define CAM_DEV_UNCONFIGURED 0x01 138 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 139 #define CAM_DEV_REL_ON_COMPLETE 0x04 140 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 141 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 142 #define CAM_DEV_TAG_AFTER_COUNT 0x20 143 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 144 u_int32_t tag_delay_count; 145 #define CAM_TAG_DELAY_COUNT 5 146 u_int32_t refcount; 147 struct callout c_handle; 148 }; 149 150 /* 151 * Each target is represented by an ET (Existing Target). These 152 * entries are created when a target is successfully probed with an 153 * identify, and removed when a device fails to respond after a number 154 * of retries, or a bus rescan finds the device missing. 155 */ 156 struct cam_et { 157 TAILQ_HEAD(, cam_ed) ed_entries; 158 TAILQ_ENTRY(cam_et) links; 159 struct cam_eb *bus; 160 target_id_t target_id; 161 u_int32_t refcount; 162 u_int generation; 163 struct timeval last_reset; /* uptime of last reset */ 164 }; 165 166 /* 167 * Each bus is represented by an EB (Existing Bus). These entries 168 * are created by calls to xpt_bus_register and deleted by calls to 169 * xpt_bus_deregister. 170 */ 171 struct cam_eb { 172 TAILQ_HEAD(, cam_et) et_entries; 173 TAILQ_ENTRY(cam_eb) links; 174 path_id_t path_id; 175 struct cam_sim *sim; 176 struct timeval last_reset; /* uptime of last reset */ 177 u_int32_t flags; 178 #define CAM_EB_RUNQ_SCHEDULED 0x01 179 u_int32_t refcount; 180 u_int generation; 181 }; 182 183 struct cam_path { 184 struct cam_periph *periph; 185 struct cam_eb *bus; 186 struct cam_et *target; 187 struct cam_ed *device; 188 }; 189 190 struct xpt_quirk_entry { 191 struct scsi_inquiry_pattern inq_pat; 192 u_int8_t quirks; 193 #define CAM_QUIRK_NOLUNS 0x01 194 #define CAM_QUIRK_NOSERIAL 0x02 195 #define CAM_QUIRK_HILUNS 0x04 196 u_int mintags; 197 u_int maxtags; 198 }; 199 #define CAM_SCSI2_MAXLUN 8 200 201 typedef enum { 202 XPT_FLAG_OPEN = 0x01 203 } xpt_flags; 204 205 struct xpt_softc { 206 xpt_flags flags; 207 u_int32_t generation; 208 }; 209 210 static const char quantum[] = "QUANTUM"; 211 static const char sony[] = "SONY"; 212 static const char west_digital[] = "WDIGTL"; 213 static const char samsung[] = "SAMSUNG"; 214 static const char seagate[] = "SEAGATE"; 215 static const char microp[] = "MICROP"; 216 217 static struct xpt_quirk_entry xpt_quirk_table[] = 218 { 219 { 220 /* Reports QUEUE FULL for temporary resource shortages */ 221 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 222 /*quirks*/0, /*mintags*/24, /*maxtags*/32 223 }, 224 { 225 /* Reports QUEUE FULL for temporary resource shortages */ 226 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 227 /*quirks*/0, /*mintags*/24, /*maxtags*/32 228 }, 229 { 230 /* Reports QUEUE FULL for temporary resource shortages */ 231 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 232 /*quirks*/0, /*mintags*/24, /*maxtags*/32 233 }, 234 { 235 /* Broken tagged queuing drive */ 236 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 237 /*quirks*/0, /*mintags*/0, /*maxtags*/0 238 }, 239 { 240 /* Broken tagged queuing drive */ 241 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 242 /*quirks*/0, /*mintags*/0, /*maxtags*/0 243 }, 244 { 245 /* Broken tagged queuing drive */ 246 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 247 /*quirks*/0, /*mintags*/0, /*maxtags*/0 248 }, 249 { 250 /* 251 * Unfortunately, the Quantum Atlas III has the same 252 * problem as the Atlas II drives above. 253 * Reported by: "Johan Granlund" <johan@granlund.nu> 254 * 255 * For future reference, the drive with the problem was: 256 * QUANTUM QM39100TD-SW N1B0 257 * 258 * It's possible that Quantum will fix the problem in later 259 * firmware revisions. If that happens, the quirk entry 260 * will need to be made specific to the firmware revisions 261 * with the problem. 262 * 263 */ 264 /* Reports QUEUE FULL for temporary resource shortages */ 265 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 266 /*quirks*/0, /*mintags*/24, /*maxtags*/32 267 }, 268 { 269 /* 270 * 18 Gig Atlas III, same problem as the 9G version. 271 * Reported by: Andre Albsmeier 272 * <andre.albsmeier@mchp.siemens.de> 273 * 274 * For future reference, the drive with the problem was: 275 * QUANTUM QM318000TD-S N491 276 */ 277 /* Reports QUEUE FULL for temporary resource shortages */ 278 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 279 /*quirks*/0, /*mintags*/24, /*maxtags*/32 280 }, 281 { 282 /* 283 * Broken tagged queuing drive 284 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 285 * and: Martin Renters <martin@tdc.on.ca> 286 */ 287 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 288 /*quirks*/0, /*mintags*/0, /*maxtags*/0 289 }, 290 /* 291 * The Seagate Medalist Pro drives have very poor write 292 * performance with anything more than 2 tags. 293 * 294 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 295 * Drive: <SEAGATE ST36530N 1444> 296 * 297 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 298 * Drive: <SEAGATE ST34520W 1281> 299 * 300 * No one has actually reported that the 9G version 301 * (ST39140*) of the Medalist Pro has the same problem, but 302 * we're assuming that it does because the 4G and 6.5G 303 * versions of the drive are broken. 304 */ 305 { 306 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 307 /*quirks*/0, /*mintags*/2, /*maxtags*/2 308 }, 309 { 310 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 311 /*quirks*/0, /*mintags*/2, /*maxtags*/2 312 }, 313 { 314 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 315 /*quirks*/0, /*mintags*/2, /*maxtags*/2 316 }, 317 { 318 /* 319 * Slow when tagged queueing is enabled. Write performance 320 * steadily drops off with more and more concurrent 321 * transactions. Best sequential write performance with 322 * tagged queueing turned off and write caching turned on. 323 * 324 * PR: kern/10398 325 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 326 * Drive: DCAS-34330 w/ "S65A" firmware. 327 * 328 * The drive with the problem had the "S65A" firmware 329 * revision, and has also been reported (by Stephen J. 330 * Roznowski <sjr@home.net>) for a drive with the "S61A" 331 * firmware revision. 332 * 333 * Although no one has reported problems with the 2 gig 334 * version of the DCAS drive, the assumption is that it 335 * has the same problems as the 4 gig version. Therefore 336 * this quirk entries disables tagged queueing for all 337 * DCAS drives. 338 */ 339 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 340 /*quirks*/0, /*mintags*/0, /*maxtags*/0 341 }, 342 { 343 /* Broken tagged queuing drive */ 344 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 345 /*quirks*/0, /*mintags*/0, /*maxtags*/0 346 }, 347 { 348 /* Broken tagged queuing drive */ 349 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 350 /*quirks*/0, /*mintags*/0, /*maxtags*/0 351 }, 352 { 353 /* 354 * Broken tagged queuing drive. 355 * Submitted by: 356 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 357 * in PR kern/9535 358 */ 359 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 360 /*quirks*/0, /*mintags*/0, /*maxtags*/0 361 }, 362 { 363 /* 364 * Slow when tagged queueing is enabled. (1.5MB/sec versus 365 * 8MB/sec.) 366 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 367 * Best performance with these drives is achieved with 368 * tagged queueing turned off, and write caching turned on. 369 */ 370 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 371 /*quirks*/0, /*mintags*/0, /*maxtags*/0 372 }, 373 { 374 /* 375 * Slow when tagged queueing is enabled. (1.5MB/sec versus 376 * 8MB/sec.) 377 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 378 * Best performance with these drives is achieved with 379 * tagged queueing turned off, and write caching turned on. 380 */ 381 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 382 /*quirks*/0, /*mintags*/0, /*maxtags*/0 383 }, 384 { 385 /* 386 * Doesn't handle queue full condition correctly, 387 * so we need to limit maxtags to what the device 388 * can handle instead of determining this automatically. 389 */ 390 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 391 /*quirks*/0, /*mintags*/2, /*maxtags*/32 392 }, 393 { 394 /* Really only one LUN */ 395 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 396 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 397 }, 398 { 399 /* I can't believe we need a quirk for DPT volumes. */ 400 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 401 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 402 /*mintags*/0, /*maxtags*/255 403 }, 404 { 405 /* 406 * Many Sony CDROM drives don't like multi-LUN probing. 407 */ 408 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 409 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 410 }, 411 { 412 /* 413 * This drive doesn't like multiple LUN probing. 414 * Submitted by: Parag Patel <parag@cgt.com> 415 */ 416 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 417 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 418 }, 419 { 420 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 421 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 422 }, 423 { 424 /* 425 * The 8200 doesn't like multi-lun probing, and probably 426 * don't like serial number requests either. 427 */ 428 { 429 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 430 "EXB-8200*", "*" 431 }, 432 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 433 }, 434 { 435 /* 436 * Let's try the same as above, but for a drive that says 437 * it's an IPL-6860 but is actually an EXB 8200. 438 */ 439 { 440 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 441 "IPL-6860*", "*" 442 }, 443 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 444 }, 445 { 446 /* 447 * These Hitachi drives don't like multi-lun probing. 448 * The PR submitter has a DK319H, but says that the Linux 449 * kernel has a similar work-around for the DK312 and DK314, 450 * so all DK31* drives are quirked here. 451 * PR: misc/18793 452 * Submitted by: Paul Haddad <paul@pth.com> 453 */ 454 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 455 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 456 }, 457 { 458 /* 459 * This old revision of the TDC3600 is also SCSI-1, and 460 * hangs upon serial number probing. 461 */ 462 { 463 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 464 " TDC 3600", "U07:" 465 }, 466 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 467 }, 468 { 469 /* 470 * Would repond to all LUNs if asked for. 471 */ 472 { 473 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 474 "CP150", "*" 475 }, 476 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 477 }, 478 { 479 /* 480 * Would repond to all LUNs if asked for. 481 */ 482 { 483 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 484 "96X2*", "*" 485 }, 486 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 487 }, 488 { 489 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 490 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 491 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 492 }, 493 { 494 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 495 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 496 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 497 }, 498 { 499 /* TeraSolutions special settings for TRC-22 RAID */ 500 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 501 /*quirks*/0, /*mintags*/55, /*maxtags*/255 502 }, 503 { 504 /* Veritas Storage Appliance */ 505 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 506 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 507 }, 508 { 509 /* 510 * Would respond to all LUNs. Device type and removable 511 * flag are jumper-selectable. 512 */ 513 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 514 "Tahiti 1", "*" 515 }, 516 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 517 }, 518 { 519 /* Default tagged queuing parameters for all devices */ 520 { 521 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 522 /*vendor*/"*", /*product*/"*", /*revision*/"*" 523 }, 524 /*quirks*/0, /*mintags*/2, /*maxtags*/255 525 }, 526 }; 527 528 static const int xpt_quirk_table_size = 529 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 530 531 typedef enum { 532 DM_RET_COPY = 0x01, 533 DM_RET_FLAG_MASK = 0x0f, 534 DM_RET_NONE = 0x00, 535 DM_RET_STOP = 0x10, 536 DM_RET_DESCEND = 0x20, 537 DM_RET_ERROR = 0x30, 538 DM_RET_ACTION_MASK = 0xf0 539 } dev_match_ret; 540 541 typedef enum { 542 XPT_DEPTH_BUS, 543 XPT_DEPTH_TARGET, 544 XPT_DEPTH_DEVICE, 545 XPT_DEPTH_PERIPH 546 } xpt_traverse_depth; 547 548 struct xpt_traverse_config { 549 xpt_traverse_depth depth; 550 void *tr_func; 551 void *tr_arg; 552 }; 553 554 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 555 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 556 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 557 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 558 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 559 560 /* Transport layer configuration information */ 561 static struct xpt_softc xsoftc; 562 563 /* Queues for our software interrupt handler */ 564 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 565 static cam_isrq_t cam_bioq; 566 static cam_isrq_t cam_netq; 567 568 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 569 static SLIST_HEAD(,ccb_hdr) ccb_freeq; 570 static u_int xpt_max_ccbs; /* 571 * Maximum size of ccb pool. Modified as 572 * devices are added/removed or have their 573 * opening counts changed. 574 */ 575 static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 576 577 struct cam_periph *xpt_periph; 578 579 static periph_init_t xpt_periph_init; 580 581 static periph_init_t probe_periph_init; 582 583 static struct periph_driver xpt_driver = 584 { 585 xpt_periph_init, "xpt", 586 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 587 }; 588 589 static struct periph_driver probe_driver = 590 { 591 probe_periph_init, "probe", 592 TAILQ_HEAD_INITIALIZER(probe_driver.units) 593 }; 594 595 DATA_SET(periphdriver_set, xpt_driver); 596 DATA_SET(periphdriver_set, probe_driver); 597 598 #define XPT_CDEV_MAJOR 104 599 600 static d_open_t xptopen; 601 static d_close_t xptclose; 602 static d_ioctl_t xptioctl; 603 604 static struct dev_ops xpt_ops = { 605 { "xpt", XPT_CDEV_MAJOR, 0 }, 606 .d_open = xptopen, 607 .d_close = xptclose, 608 .d_ioctl = xptioctl 609 }; 610 611 static struct intr_config_hook *xpt_config_hook; 612 613 /* Registered busses */ 614 static TAILQ_HEAD(,cam_eb) xpt_busses; 615 static u_int bus_generation; 616 617 /* Storage for debugging datastructures */ 618 #ifdef CAMDEBUG 619 struct cam_path *cam_dpath; 620 u_int32_t cam_dflags; 621 u_int32_t cam_debug_delay; 622 #endif 623 624 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 625 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 626 #endif 627 628 /* 629 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 630 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 631 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 632 */ 633 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 634 || defined(CAM_DEBUG_LUN) 635 #ifdef CAMDEBUG 636 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 637 || !defined(CAM_DEBUG_LUN) 638 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 639 and CAM_DEBUG_LUN" 640 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 641 #else /* !CAMDEBUG */ 642 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 643 #endif /* CAMDEBUG */ 644 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 645 646 /* Our boot-time initialization hook */ 647 static void xpt_init(void *); 648 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL); 649 650 static cam_status xpt_compile_path(struct cam_path *new_path, 651 struct cam_periph *perph, 652 path_id_t path_id, 653 target_id_t target_id, 654 lun_id_t lun_id); 655 656 static void xpt_release_path(struct cam_path *path); 657 658 static void xpt_async_bcast(struct async_list *async_head, 659 u_int32_t async_code, 660 struct cam_path *path, 661 void *async_arg); 662 static void xpt_dev_async(u_int32_t async_code, 663 struct cam_eb *bus, 664 struct cam_et *target, 665 struct cam_ed *device, 666 void *async_arg); 667 static path_id_t xptnextfreepathid(void); 668 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 669 static union ccb *xpt_get_ccb(struct cam_ed *device); 670 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 671 u_int32_t new_priority); 672 static void xpt_run_dev_allocq(struct cam_eb *bus); 673 static void xpt_run_dev_sendq(struct cam_eb *bus); 674 static timeout_t xpt_release_devq_timeout; 675 static void xpt_release_bus(struct cam_eb *bus); 676 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 677 int run_queue); 678 static struct cam_et* 679 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 680 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 681 static struct cam_ed* 682 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 683 lun_id_t lun_id); 684 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 685 struct cam_ed *device); 686 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 687 static struct cam_eb* 688 xpt_find_bus(path_id_t path_id); 689 static struct cam_et* 690 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 691 static struct cam_ed* 692 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 693 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 694 static void xpt_scan_lun(struct cam_periph *periph, 695 struct cam_path *path, cam_flags flags, 696 union ccb *ccb); 697 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 698 static xpt_busfunc_t xptconfigbuscountfunc; 699 static xpt_busfunc_t xptconfigfunc; 700 static void xpt_config(void *arg); 701 static xpt_devicefunc_t xptpassannouncefunc; 702 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 703 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 704 static void xptpoll(struct cam_sim *sim); 705 static inthand2_t swi_camnet; 706 static inthand2_t swi_cambio; 707 static void camisr(cam_isrq_t *queue); 708 #if 0 709 static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 710 static void xptasync(struct cam_periph *periph, 711 u_int32_t code, cam_path *path); 712 #endif 713 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 714 int num_patterns, struct cam_eb *bus); 715 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 716 int num_patterns, struct cam_ed *device); 717 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 718 int num_patterns, 719 struct cam_periph *periph); 720 static xpt_busfunc_t xptedtbusfunc; 721 static xpt_targetfunc_t xptedttargetfunc; 722 static xpt_devicefunc_t xptedtdevicefunc; 723 static xpt_periphfunc_t xptedtperiphfunc; 724 static xpt_pdrvfunc_t xptplistpdrvfunc; 725 static xpt_periphfunc_t xptplistperiphfunc; 726 static int xptedtmatch(struct ccb_dev_match *cdm); 727 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 728 static int xptbustraverse(struct cam_eb *start_bus, 729 xpt_busfunc_t *tr_func, void *arg); 730 static int xpttargettraverse(struct cam_eb *bus, 731 struct cam_et *start_target, 732 xpt_targetfunc_t *tr_func, void *arg); 733 static int xptdevicetraverse(struct cam_et *target, 734 struct cam_ed *start_device, 735 xpt_devicefunc_t *tr_func, void *arg); 736 static int xptperiphtraverse(struct cam_ed *device, 737 struct cam_periph *start_periph, 738 xpt_periphfunc_t *tr_func, void *arg); 739 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 740 xpt_pdrvfunc_t *tr_func, void *arg); 741 static int xptpdperiphtraverse(struct periph_driver **pdrv, 742 struct cam_periph *start_periph, 743 xpt_periphfunc_t *tr_func, 744 void *arg); 745 static xpt_busfunc_t xptdefbusfunc; 746 static xpt_targetfunc_t xptdeftargetfunc; 747 static xpt_devicefunc_t xptdefdevicefunc; 748 static xpt_periphfunc_t xptdefperiphfunc; 749 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 750 #ifdef notusedyet 751 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 752 void *arg); 753 #endif 754 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 755 void *arg); 756 #ifdef notusedyet 757 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 758 void *arg); 759 #endif 760 static xpt_devicefunc_t xptsetasyncfunc; 761 static xpt_busfunc_t xptsetasyncbusfunc; 762 static cam_status xptregister(struct cam_periph *periph, 763 void *arg); 764 static cam_status proberegister(struct cam_periph *periph, 765 void *arg); 766 static void probeschedule(struct cam_periph *probe_periph); 767 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 768 static void proberequestdefaultnegotiation(struct cam_periph *periph); 769 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 770 static void probecleanup(struct cam_periph *periph); 771 static void xpt_find_quirk(struct cam_ed *device); 772 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 773 struct cam_ed *device, 774 int async_update); 775 static void xpt_toggle_tags(struct cam_path *path); 776 static void xpt_start_tags(struct cam_path *path); 777 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 778 struct cam_ed *dev); 779 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 780 struct cam_ed *dev); 781 static __inline int periph_is_queued(struct cam_periph *periph); 782 static __inline int device_is_alloc_queued(struct cam_ed *device); 783 static __inline int device_is_send_queued(struct cam_ed *device); 784 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 785 786 static __inline int 787 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 788 { 789 int retval; 790 791 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 792 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 793 cam_ccbq_resize(&dev->ccbq, 794 dev->ccbq.dev_openings 795 + dev->ccbq.dev_active); 796 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 797 } 798 /* 799 * The priority of a device waiting for CCB resources 800 * is that of the the highest priority peripheral driver 801 * enqueued. 802 */ 803 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 804 &dev->alloc_ccb_entry.pinfo, 805 CAMQ_GET_HEAD(&dev->drvq)->priority); 806 } else { 807 retval = 0; 808 } 809 810 return (retval); 811 } 812 813 static __inline int 814 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 815 { 816 int retval; 817 818 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 819 /* 820 * The priority of a device waiting for controller 821 * resources is that of the the highest priority CCB 822 * enqueued. 823 */ 824 retval = 825 xpt_schedule_dev(&bus->sim->devq->send_queue, 826 &dev->send_ccb_entry.pinfo, 827 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 828 } else { 829 retval = 0; 830 } 831 return (retval); 832 } 833 834 static __inline int 835 periph_is_queued(struct cam_periph *periph) 836 { 837 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 838 } 839 840 static __inline int 841 device_is_alloc_queued(struct cam_ed *device) 842 { 843 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 844 } 845 846 static __inline int 847 device_is_send_queued(struct cam_ed *device) 848 { 849 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 850 } 851 852 static __inline int 853 dev_allocq_is_runnable(struct cam_devq *devq) 854 { 855 /* 856 * Have work to do. 857 * Have space to do more work. 858 * Allowed to do work. 859 */ 860 return ((devq->alloc_queue.qfrozen_cnt == 0) 861 && (devq->alloc_queue.entries > 0) 862 && (devq->alloc_openings > 0)); 863 } 864 865 static void 866 xpt_periph_init(void) 867 { 868 dev_ops_add(&xpt_ops, 0, 0); 869 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 870 } 871 872 static void 873 probe_periph_init(void) 874 { 875 } 876 877 878 static void 879 xptdone(struct cam_periph *periph, union ccb *done_ccb) 880 { 881 /* Caller will release the CCB */ 882 wakeup(&done_ccb->ccb_h.cbfcnp); 883 } 884 885 static int 886 xptopen(struct dev_open_args *ap) 887 { 888 cdev_t dev = ap->a_head.a_dev; 889 int unit; 890 891 unit = minor(dev) & 0xff; 892 893 /* 894 * Only allow read-write access. 895 */ 896 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) 897 return(EPERM); 898 899 /* 900 * We don't allow nonblocking access. 901 */ 902 if ((ap->a_oflags & O_NONBLOCK) != 0) { 903 kprintf("xpt%d: can't do nonblocking access\n", unit); 904 return(ENODEV); 905 } 906 907 /* 908 * We only have one transport layer right now. If someone accesses 909 * us via something other than minor number 1, point out their 910 * mistake. 911 */ 912 if (unit != 0) { 913 kprintf("xptopen: got invalid xpt unit %d\n", unit); 914 return(ENXIO); 915 } 916 917 /* Mark ourselves open */ 918 xsoftc.flags |= XPT_FLAG_OPEN; 919 920 return(0); 921 } 922 923 static int 924 xptclose(struct dev_close_args *ap) 925 { 926 cdev_t dev = ap->a_head.a_dev; 927 int unit; 928 929 unit = minor(dev) & 0xff; 930 931 /* 932 * We only have one transport layer right now. If someone accesses 933 * us via something other than minor number 1, point out their 934 * mistake. 935 */ 936 if (unit != 0) { 937 kprintf("xptclose: got invalid xpt unit %d\n", unit); 938 return(ENXIO); 939 } 940 941 /* Mark ourselves closed */ 942 xsoftc.flags &= ~XPT_FLAG_OPEN; 943 944 return(0); 945 } 946 947 static int 948 xptioctl(struct dev_ioctl_args *ap) 949 { 950 cdev_t dev = ap->a_head.a_dev; 951 int unit, error; 952 953 error = 0; 954 unit = minor(dev) & 0xff; 955 956 /* 957 * We only have one transport layer right now. If someone accesses 958 * us via something other than minor number 1, point out their 959 * mistake. 960 */ 961 if (unit != 0) { 962 kprintf("xptioctl: got invalid xpt unit %d\n", unit); 963 return(ENXIO); 964 } 965 966 switch(ap->a_cmd) { 967 /* 968 * For the transport layer CAMIOCOMMAND ioctl, we really only want 969 * to accept CCB types that don't quite make sense to send through a 970 * passthrough driver. 971 */ 972 case CAMIOCOMMAND: { 973 union ccb *ccb; 974 union ccb *inccb; 975 976 inccb = (union ccb *)ap->a_data; 977 978 switch(inccb->ccb_h.func_code) { 979 case XPT_SCAN_BUS: 980 case XPT_RESET_BUS: 981 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 982 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 983 error = EINVAL; 984 break; 985 } 986 /* FALLTHROUGH */ 987 case XPT_PATH_INQ: 988 case XPT_ENG_INQ: 989 case XPT_SCAN_LUN: 990 991 ccb = xpt_alloc_ccb(); 992 993 /* 994 * Create a path using the bus, target, and lun the 995 * user passed in. 996 */ 997 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 998 inccb->ccb_h.path_id, 999 inccb->ccb_h.target_id, 1000 inccb->ccb_h.target_lun) != 1001 CAM_REQ_CMP){ 1002 error = EINVAL; 1003 xpt_free_ccb(ccb); 1004 break; 1005 } 1006 /* Ensure all of our fields are correct */ 1007 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1008 inccb->ccb_h.pinfo.priority); 1009 xpt_merge_ccb(ccb, inccb); 1010 ccb->ccb_h.cbfcnp = xptdone; 1011 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1012 bcopy(ccb, inccb, sizeof(union ccb)); 1013 xpt_free_path(ccb->ccb_h.path); 1014 xpt_free_ccb(ccb); 1015 break; 1016 1017 case XPT_DEBUG: { 1018 union ccb ccb; 1019 1020 /* 1021 * This is an immediate CCB, so it's okay to 1022 * allocate it on the stack. 1023 */ 1024 1025 /* 1026 * Create a path using the bus, target, and lun the 1027 * user passed in. 1028 */ 1029 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1030 inccb->ccb_h.path_id, 1031 inccb->ccb_h.target_id, 1032 inccb->ccb_h.target_lun) != 1033 CAM_REQ_CMP){ 1034 error = EINVAL; 1035 break; 1036 } 1037 /* Ensure all of our fields are correct */ 1038 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1039 inccb->ccb_h.pinfo.priority); 1040 xpt_merge_ccb(&ccb, inccb); 1041 ccb.ccb_h.cbfcnp = xptdone; 1042 xpt_action(&ccb); 1043 bcopy(&ccb, inccb, sizeof(union ccb)); 1044 xpt_free_path(ccb.ccb_h.path); 1045 break; 1046 1047 } 1048 case XPT_DEV_MATCH: { 1049 struct cam_periph_map_info mapinfo; 1050 struct cam_path *old_path; 1051 1052 /* 1053 * We can't deal with physical addresses for this 1054 * type of transaction. 1055 */ 1056 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1057 error = EINVAL; 1058 break; 1059 } 1060 1061 /* 1062 * Save this in case the caller had it set to 1063 * something in particular. 1064 */ 1065 old_path = inccb->ccb_h.path; 1066 1067 /* 1068 * We really don't need a path for the matching 1069 * code. The path is needed because of the 1070 * debugging statements in xpt_action(). They 1071 * assume that the CCB has a valid path. 1072 */ 1073 inccb->ccb_h.path = xpt_periph->path; 1074 1075 bzero(&mapinfo, sizeof(mapinfo)); 1076 1077 /* 1078 * Map the pattern and match buffers into kernel 1079 * virtual address space. 1080 */ 1081 error = cam_periph_mapmem(inccb, &mapinfo); 1082 1083 if (error) { 1084 inccb->ccb_h.path = old_path; 1085 break; 1086 } 1087 1088 /* 1089 * This is an immediate CCB, we can send it on directly. 1090 */ 1091 xpt_action(inccb); 1092 1093 /* 1094 * Map the buffers back into user space. 1095 */ 1096 cam_periph_unmapmem(inccb, &mapinfo); 1097 1098 inccb->ccb_h.path = old_path; 1099 1100 error = 0; 1101 break; 1102 } 1103 default: 1104 error = ENOTSUP; 1105 break; 1106 } 1107 break; 1108 } 1109 /* 1110 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1111 * with the periphal driver name and unit name filled in. The other 1112 * fields don't really matter as input. The passthrough driver name 1113 * ("pass"), and unit number are passed back in the ccb. The current 1114 * device generation number, and the index into the device peripheral 1115 * driver list, and the status are also passed back. Note that 1116 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1117 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1118 * (or rather should be) impossible for the device peripheral driver 1119 * list to change since we look at the whole thing in one pass, and 1120 * we do it within a critical section. 1121 * 1122 */ 1123 case CAMGETPASSTHRU: { 1124 union ccb *ccb; 1125 struct cam_periph *periph; 1126 struct periph_driver **p_drv; 1127 char *name; 1128 int unit; 1129 int cur_generation; 1130 int base_periph_found; 1131 int splbreaknum; 1132 1133 ccb = (union ccb *)ap->a_data; 1134 unit = ccb->cgdl.unit_number; 1135 name = ccb->cgdl.periph_name; 1136 /* 1137 * Every 100 devices, we want to call splz() to check for 1138 * and allow the software interrupt handler a chance to run. 1139 * 1140 * Most systems won't run into this check, but this should 1141 * avoid starvation in the software interrupt handler in 1142 * large systems. 1143 */ 1144 splbreaknum = 100; 1145 1146 ccb = (union ccb *)ap->a_data; 1147 1148 base_periph_found = 0; 1149 1150 /* 1151 * Sanity check -- make sure we don't get a null peripheral 1152 * driver name. 1153 */ 1154 if (*ccb->cgdl.periph_name == '\0') { 1155 error = EINVAL; 1156 break; 1157 } 1158 1159 /* Keep the list from changing while we traverse it */ 1160 crit_enter(); 1161 ptstartover: 1162 cur_generation = xsoftc.generation; 1163 1164 /* first find our driver in the list of drivers */ 1165 SET_FOREACH(p_drv, periphdriver_set) { 1166 if (strcmp((*p_drv)->driver_name, name) == 0) 1167 break; 1168 } 1169 1170 if (*p_drv == NULL) { 1171 crit_exit(); 1172 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1173 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1174 *ccb->cgdl.periph_name = '\0'; 1175 ccb->cgdl.unit_number = 0; 1176 error = ENOENT; 1177 break; 1178 } 1179 1180 /* 1181 * Run through every peripheral instance of this driver 1182 * and check to see whether it matches the unit passed 1183 * in by the user. If it does, get out of the loops and 1184 * find the passthrough driver associated with that 1185 * peripheral driver. 1186 */ 1187 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 1188 periph = TAILQ_NEXT(periph, unit_links)) { 1189 1190 if (periph->unit_number == unit) { 1191 break; 1192 } else if (--splbreaknum == 0) { 1193 splz(); 1194 splbreaknum = 100; 1195 if (cur_generation != xsoftc.generation) 1196 goto ptstartover; 1197 } 1198 } 1199 /* 1200 * If we found the peripheral driver that the user passed 1201 * in, go through all of the peripheral drivers for that 1202 * particular device and look for a passthrough driver. 1203 */ 1204 if (periph != NULL) { 1205 struct cam_ed *device; 1206 int i; 1207 1208 base_periph_found = 1; 1209 device = periph->path->device; 1210 for (i = 0, periph = device->periphs.slh_first; 1211 periph != NULL; 1212 periph = periph->periph_links.sle_next, i++) { 1213 /* 1214 * Check to see whether we have a 1215 * passthrough device or not. 1216 */ 1217 if (strcmp(periph->periph_name, "pass") == 0) { 1218 /* 1219 * Fill in the getdevlist fields. 1220 */ 1221 strcpy(ccb->cgdl.periph_name, 1222 periph->periph_name); 1223 ccb->cgdl.unit_number = 1224 periph->unit_number; 1225 if (periph->periph_links.sle_next) 1226 ccb->cgdl.status = 1227 CAM_GDEVLIST_MORE_DEVS; 1228 else 1229 ccb->cgdl.status = 1230 CAM_GDEVLIST_LAST_DEVICE; 1231 ccb->cgdl.generation = 1232 device->generation; 1233 ccb->cgdl.index = i; 1234 /* 1235 * Fill in some CCB header fields 1236 * that the user may want. 1237 */ 1238 ccb->ccb_h.path_id = 1239 periph->path->bus->path_id; 1240 ccb->ccb_h.target_id = 1241 periph->path->target->target_id; 1242 ccb->ccb_h.target_lun = 1243 periph->path->device->lun_id; 1244 ccb->ccb_h.status = CAM_REQ_CMP; 1245 break; 1246 } 1247 } 1248 } 1249 1250 /* 1251 * If the periph is null here, one of two things has 1252 * happened. The first possibility is that we couldn't 1253 * find the unit number of the particular peripheral driver 1254 * that the user is asking about. e.g. the user asks for 1255 * the passthrough driver for "da11". We find the list of 1256 * "da" peripherals all right, but there is no unit 11. 1257 * The other possibility is that we went through the list 1258 * of peripheral drivers attached to the device structure, 1259 * but didn't find one with the name "pass". Either way, 1260 * we return ENOENT, since we couldn't find something. 1261 */ 1262 if (periph == NULL) { 1263 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1264 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1265 *ccb->cgdl.periph_name = '\0'; 1266 ccb->cgdl.unit_number = 0; 1267 error = ENOENT; 1268 /* 1269 * It is unfortunate that this is even necessary, 1270 * but there are many, many clueless users out there. 1271 * If this is true, the user is looking for the 1272 * passthrough driver, but doesn't have one in his 1273 * kernel. 1274 */ 1275 if (base_periph_found == 1) { 1276 kprintf("xptioctl: pass driver is not in the " 1277 "kernel\n"); 1278 kprintf("xptioctl: put \"device pass0\" in " 1279 "your kernel config file\n"); 1280 } 1281 } 1282 crit_exit(); 1283 break; 1284 } 1285 default: 1286 error = ENOTTY; 1287 break; 1288 } 1289 1290 return(error); 1291 } 1292 1293 /* Functions accessed by the peripheral drivers */ 1294 static void 1295 xpt_init(void *dummy) 1296 { 1297 struct cam_sim *xpt_sim; 1298 struct cam_path *path; 1299 struct cam_devq *devq; 1300 cam_status status; 1301 1302 TAILQ_INIT(&xpt_busses); 1303 TAILQ_INIT(&cam_bioq); 1304 TAILQ_INIT(&cam_netq); 1305 SLIST_INIT(&ccb_freeq); 1306 STAILQ_INIT(&highpowerq); 1307 1308 /* 1309 * The xpt layer is, itself, the equivelent of a SIM. 1310 * Allow 16 ccbs in the ccb pool for it. This should 1311 * give decent parallelism when we probe busses and 1312 * perform other XPT functions. 1313 */ 1314 devq = cam_simq_alloc(16); 1315 xpt_sim = cam_sim_alloc(xptaction, 1316 xptpoll, 1317 "xpt", 1318 /*softc*/NULL, 1319 /*unit*/0, 1320 /*max_dev_transactions*/0, 1321 /*max_tagged_dev_transactions*/0, 1322 devq); 1323 cam_simq_release(devq); 1324 xpt_max_ccbs = 16; 1325 1326 xpt_bus_register(xpt_sim, /*bus #*/0); 1327 1328 /* 1329 * Looking at the XPT from the SIM layer, the XPT is 1330 * the equivelent of a peripheral driver. Allocate 1331 * a peripheral driver entry for us. 1332 */ 1333 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1334 CAM_TARGET_WILDCARD, 1335 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1336 kprintf("xpt_init: xpt_create_path failed with status %#x," 1337 " failing attach\n", status); 1338 return; 1339 } 1340 1341 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1342 path, NULL, 0, NULL); 1343 xpt_free_path(path); 1344 1345 xpt_sim->softc = xpt_periph; 1346 1347 /* 1348 * Register a callback for when interrupts are enabled. 1349 */ 1350 xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1351 M_TEMP, M_INTWAIT | M_ZERO); 1352 xpt_config_hook->ich_func = xpt_config; 1353 xpt_config_hook->ich_desc = "xpt"; 1354 if (config_intrhook_establish(xpt_config_hook) != 0) { 1355 kfree (xpt_config_hook, M_TEMP); 1356 kprintf("xpt_init: config_intrhook_establish failed " 1357 "- failing attach\n"); 1358 } 1359 1360 /* Install our software interrupt handlers */ 1361 register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet", NULL); 1362 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL); 1363 } 1364 1365 static cam_status 1366 xptregister(struct cam_periph *periph, void *arg) 1367 { 1368 if (periph == NULL) { 1369 kprintf("xptregister: periph was NULL!!\n"); 1370 return(CAM_REQ_CMP_ERR); 1371 } 1372 1373 periph->softc = NULL; 1374 1375 xpt_periph = periph; 1376 1377 return(CAM_REQ_CMP); 1378 } 1379 1380 int32_t 1381 xpt_add_periph(struct cam_periph *periph) 1382 { 1383 struct cam_ed *device; 1384 int32_t status; 1385 struct periph_list *periph_head; 1386 1387 device = periph->path->device; 1388 1389 periph_head = &device->periphs; 1390 1391 status = CAM_REQ_CMP; 1392 1393 if (device != NULL) { 1394 /* 1395 * Make room for this peripheral 1396 * so it will fit in the queue 1397 * when it's scheduled to run 1398 */ 1399 crit_enter(); 1400 status = camq_resize(&device->drvq, 1401 device->drvq.array_size + 1); 1402 1403 device->generation++; 1404 1405 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1406 crit_exit(); 1407 } 1408 1409 xsoftc.generation++; 1410 1411 return (status); 1412 } 1413 1414 void 1415 xpt_remove_periph(struct cam_periph *periph) 1416 { 1417 struct cam_ed *device; 1418 1419 device = periph->path->device; 1420 1421 if (device != NULL) { 1422 struct periph_list *periph_head; 1423 1424 periph_head = &device->periphs; 1425 1426 /* Release the slot for this peripheral */ 1427 crit_enter(); 1428 camq_resize(&device->drvq, device->drvq.array_size - 1); 1429 1430 device->generation++; 1431 1432 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1433 crit_exit(); 1434 } 1435 1436 xsoftc.generation++; 1437 1438 } 1439 1440 void 1441 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1442 { 1443 u_int mb; 1444 struct cam_path *path; 1445 struct ccb_trans_settings cts; 1446 1447 path = periph->path; 1448 /* 1449 * To ensure that this is printed in one piece, 1450 * mask out CAM interrupts. 1451 */ 1452 crit_enter(); 1453 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1454 periph->periph_name, periph->unit_number, 1455 path->bus->sim->sim_name, 1456 path->bus->sim->unit_number, 1457 path->bus->sim->bus_id, 1458 path->target->target_id, 1459 path->device->lun_id); 1460 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1461 scsi_print_inquiry(&path->device->inq_data); 1462 if ((bootverbose) 1463 && (path->device->serial_num_len > 0)) { 1464 /* Don't wrap the screen - print only the first 60 chars */ 1465 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1466 periph->unit_number, path->device->serial_num); 1467 } 1468 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1469 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1470 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1471 xpt_action((union ccb*)&cts); 1472 if (cts.ccb_h.status == CAM_REQ_CMP) { 1473 u_int speed; 1474 u_int freq; 1475 1476 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1477 && cts.sync_offset != 0) { 1478 freq = scsi_calc_syncsrate(cts.sync_period); 1479 speed = freq; 1480 } else { 1481 struct ccb_pathinq cpi; 1482 1483 /* Ask the SIM for its base transfer speed */ 1484 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1485 cpi.ccb_h.func_code = XPT_PATH_INQ; 1486 xpt_action((union ccb *)&cpi); 1487 1488 speed = cpi.base_transfer_speed; 1489 freq = 0; 1490 } 1491 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1492 speed *= (0x01 << cts.bus_width); 1493 mb = speed / 1000; 1494 if (mb > 0) 1495 kprintf("%s%d: %d.%03dMB/s transfers", 1496 periph->periph_name, periph->unit_number, 1497 mb, speed % 1000); 1498 else 1499 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1500 periph->unit_number, speed); 1501 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1502 && cts.sync_offset != 0) { 1503 kprintf(" (%d.%03dMHz, offset %d", freq / 1000, 1504 freq % 1000, cts.sync_offset); 1505 } 1506 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1507 && cts.bus_width > 0) { 1508 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1509 && cts.sync_offset != 0) { 1510 kprintf(", "); 1511 } else { 1512 kprintf(" ("); 1513 } 1514 kprintf("%dbit)", 8 * (0x01 << cts.bus_width)); 1515 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1516 && cts.sync_offset != 0) { 1517 kprintf(")"); 1518 } 1519 1520 if (path->device->inq_flags & SID_CmdQue 1521 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1522 kprintf(", Tagged Queueing Enabled"); 1523 } 1524 1525 kprintf("\n"); 1526 } else if (path->device->inq_flags & SID_CmdQue 1527 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1528 kprintf("%s%d: Tagged Queueing Enabled\n", 1529 periph->periph_name, periph->unit_number); 1530 } 1531 1532 /* 1533 * We only want to print the caller's announce string if they've 1534 * passed one in.. 1535 */ 1536 if (announce_string != NULL) 1537 kprintf("%s%d: %s\n", periph->periph_name, 1538 periph->unit_number, announce_string); 1539 crit_exit(); 1540 } 1541 1542 1543 static dev_match_ret 1544 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns, 1545 struct cam_eb *bus) 1546 { 1547 dev_match_ret retval; 1548 int i; 1549 1550 retval = DM_RET_NONE; 1551 1552 /* 1553 * If we aren't given something to match against, that's an error. 1554 */ 1555 if (bus == NULL) 1556 return(DM_RET_ERROR); 1557 1558 /* 1559 * If there are no match entries, then this bus matches no 1560 * matter what. 1561 */ 1562 if ((patterns == NULL) || (num_patterns == 0)) 1563 return(DM_RET_DESCEND | DM_RET_COPY); 1564 1565 for (i = 0; i < num_patterns; i++) { 1566 struct bus_match_pattern *cur_pattern; 1567 1568 /* 1569 * If the pattern in question isn't for a bus node, we 1570 * aren't interested. However, we do indicate to the 1571 * calling routine that we should continue descending the 1572 * tree, since the user wants to match against lower-level 1573 * EDT elements. 1574 */ 1575 if (patterns[i].type != DEV_MATCH_BUS) { 1576 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1577 retval |= DM_RET_DESCEND; 1578 continue; 1579 } 1580 1581 cur_pattern = &patterns[i].pattern.bus_pattern; 1582 1583 /* 1584 * If they want to match any bus node, we give them any 1585 * device node. 1586 */ 1587 if (cur_pattern->flags == BUS_MATCH_ANY) { 1588 /* set the copy flag */ 1589 retval |= DM_RET_COPY; 1590 1591 /* 1592 * If we've already decided on an action, go ahead 1593 * and return. 1594 */ 1595 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1596 return(retval); 1597 } 1598 1599 /* 1600 * Not sure why someone would do this... 1601 */ 1602 if (cur_pattern->flags == BUS_MATCH_NONE) 1603 continue; 1604 1605 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1606 && (cur_pattern->path_id != bus->path_id)) 1607 continue; 1608 1609 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1610 && (cur_pattern->bus_id != bus->sim->bus_id)) 1611 continue; 1612 1613 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1614 && (cur_pattern->unit_number != bus->sim->unit_number)) 1615 continue; 1616 1617 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1618 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1619 DEV_IDLEN) != 0)) 1620 continue; 1621 1622 /* 1623 * If we get to this point, the user definitely wants 1624 * information on this bus. So tell the caller to copy the 1625 * data out. 1626 */ 1627 retval |= DM_RET_COPY; 1628 1629 /* 1630 * If the return action has been set to descend, then we 1631 * know that we've already seen a non-bus matching 1632 * expression, therefore we need to further descend the tree. 1633 * This won't change by continuing around the loop, so we 1634 * go ahead and return. If we haven't seen a non-bus 1635 * matching expression, we keep going around the loop until 1636 * we exhaust the matching expressions. We'll set the stop 1637 * flag once we fall out of the loop. 1638 */ 1639 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1640 return(retval); 1641 } 1642 1643 /* 1644 * If the return action hasn't been set to descend yet, that means 1645 * we haven't seen anything other than bus matching patterns. So 1646 * tell the caller to stop descending the tree -- the user doesn't 1647 * want to match against lower level tree elements. 1648 */ 1649 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1650 retval |= DM_RET_STOP; 1651 1652 return(retval); 1653 } 1654 1655 static dev_match_ret 1656 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns, 1657 struct cam_ed *device) 1658 { 1659 dev_match_ret retval; 1660 int i; 1661 1662 retval = DM_RET_NONE; 1663 1664 /* 1665 * If we aren't given something to match against, that's an error. 1666 */ 1667 if (device == NULL) 1668 return(DM_RET_ERROR); 1669 1670 /* 1671 * If there are no match entries, then this device matches no 1672 * matter what. 1673 */ 1674 if ((patterns == NULL) || (patterns == 0)) 1675 return(DM_RET_DESCEND | DM_RET_COPY); 1676 1677 for (i = 0; i < num_patterns; i++) { 1678 struct device_match_pattern *cur_pattern; 1679 1680 /* 1681 * If the pattern in question isn't for a device node, we 1682 * aren't interested. 1683 */ 1684 if (patterns[i].type != DEV_MATCH_DEVICE) { 1685 if ((patterns[i].type == DEV_MATCH_PERIPH) 1686 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1687 retval |= DM_RET_DESCEND; 1688 continue; 1689 } 1690 1691 cur_pattern = &patterns[i].pattern.device_pattern; 1692 1693 /* 1694 * If they want to match any device node, we give them any 1695 * device node. 1696 */ 1697 if (cur_pattern->flags == DEV_MATCH_ANY) { 1698 /* set the copy flag */ 1699 retval |= DM_RET_COPY; 1700 1701 1702 /* 1703 * If we've already decided on an action, go ahead 1704 * and return. 1705 */ 1706 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1707 return(retval); 1708 } 1709 1710 /* 1711 * Not sure why someone would do this... 1712 */ 1713 if (cur_pattern->flags == DEV_MATCH_NONE) 1714 continue; 1715 1716 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1717 && (cur_pattern->path_id != device->target->bus->path_id)) 1718 continue; 1719 1720 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1721 && (cur_pattern->target_id != device->target->target_id)) 1722 continue; 1723 1724 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1725 && (cur_pattern->target_lun != device->lun_id)) 1726 continue; 1727 1728 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1729 && (cam_quirkmatch((caddr_t)&device->inq_data, 1730 (caddr_t)&cur_pattern->inq_pat, 1731 1, sizeof(cur_pattern->inq_pat), 1732 scsi_static_inquiry_match) == NULL)) 1733 continue; 1734 1735 /* 1736 * If we get to this point, the user definitely wants 1737 * information on this device. So tell the caller to copy 1738 * the data out. 1739 */ 1740 retval |= DM_RET_COPY; 1741 1742 /* 1743 * If the return action has been set to descend, then we 1744 * know that we've already seen a peripheral matching 1745 * expression, therefore we need to further descend the tree. 1746 * This won't change by continuing around the loop, so we 1747 * go ahead and return. If we haven't seen a peripheral 1748 * matching expression, we keep going around the loop until 1749 * we exhaust the matching expressions. We'll set the stop 1750 * flag once we fall out of the loop. 1751 */ 1752 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1753 return(retval); 1754 } 1755 1756 /* 1757 * If the return action hasn't been set to descend yet, that means 1758 * we haven't seen any peripheral matching patterns. So tell the 1759 * caller to stop descending the tree -- the user doesn't want to 1760 * match against lower level tree elements. 1761 */ 1762 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1763 retval |= DM_RET_STOP; 1764 1765 return(retval); 1766 } 1767 1768 /* 1769 * Match a single peripheral against any number of match patterns. 1770 */ 1771 static dev_match_ret 1772 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns, 1773 struct cam_periph *periph) 1774 { 1775 dev_match_ret retval; 1776 int i; 1777 1778 /* 1779 * If we aren't given something to match against, that's an error. 1780 */ 1781 if (periph == NULL) 1782 return(DM_RET_ERROR); 1783 1784 /* 1785 * If there are no match entries, then this peripheral matches no 1786 * matter what. 1787 */ 1788 if ((patterns == NULL) || (num_patterns == 0)) 1789 return(DM_RET_STOP | DM_RET_COPY); 1790 1791 /* 1792 * There aren't any nodes below a peripheral node, so there's no 1793 * reason to descend the tree any further. 1794 */ 1795 retval = DM_RET_STOP; 1796 1797 for (i = 0; i < num_patterns; i++) { 1798 struct periph_match_pattern *cur_pattern; 1799 1800 /* 1801 * If the pattern in question isn't for a peripheral, we 1802 * aren't interested. 1803 */ 1804 if (patterns[i].type != DEV_MATCH_PERIPH) 1805 continue; 1806 1807 cur_pattern = &patterns[i].pattern.periph_pattern; 1808 1809 /* 1810 * If they want to match on anything, then we will do so. 1811 */ 1812 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1813 /* set the copy flag */ 1814 retval |= DM_RET_COPY; 1815 1816 /* 1817 * We've already set the return action to stop, 1818 * since there are no nodes below peripherals in 1819 * the tree. 1820 */ 1821 return(retval); 1822 } 1823 1824 /* 1825 * Not sure why someone would do this... 1826 */ 1827 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1828 continue; 1829 1830 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1831 && (cur_pattern->path_id != periph->path->bus->path_id)) 1832 continue; 1833 1834 /* 1835 * For the target and lun id's, we have to make sure the 1836 * target and lun pointers aren't NULL. The xpt peripheral 1837 * has a wildcard target and device. 1838 */ 1839 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1840 && ((periph->path->target == NULL) 1841 ||(cur_pattern->target_id != periph->path->target->target_id))) 1842 continue; 1843 1844 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1845 && ((periph->path->device == NULL) 1846 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1847 continue; 1848 1849 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1850 && (cur_pattern->unit_number != periph->unit_number)) 1851 continue; 1852 1853 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1854 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1855 DEV_IDLEN) != 0)) 1856 continue; 1857 1858 /* 1859 * If we get to this point, the user definitely wants 1860 * information on this peripheral. So tell the caller to 1861 * copy the data out. 1862 */ 1863 retval |= DM_RET_COPY; 1864 1865 /* 1866 * The return action has already been set to stop, since 1867 * peripherals don't have any nodes below them in the EDT. 1868 */ 1869 return(retval); 1870 } 1871 1872 /* 1873 * If we get to this point, the peripheral that was passed in 1874 * doesn't match any of the patterns. 1875 */ 1876 return(retval); 1877 } 1878 1879 static int 1880 xptedtbusfunc(struct cam_eb *bus, void *arg) 1881 { 1882 struct ccb_dev_match *cdm; 1883 dev_match_ret retval; 1884 1885 cdm = (struct ccb_dev_match *)arg; 1886 1887 /* 1888 * If our position is for something deeper in the tree, that means 1889 * that we've already seen this node. So, we keep going down. 1890 */ 1891 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1892 && (cdm->pos.cookie.bus == bus) 1893 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1894 && (cdm->pos.cookie.target != NULL)) 1895 retval = DM_RET_DESCEND; 1896 else 1897 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1898 1899 /* 1900 * If we got an error, bail out of the search. 1901 */ 1902 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1903 cdm->status = CAM_DEV_MATCH_ERROR; 1904 return(0); 1905 } 1906 1907 /* 1908 * If the copy flag is set, copy this bus out. 1909 */ 1910 if (retval & DM_RET_COPY) { 1911 int spaceleft, j; 1912 1913 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1914 sizeof(struct dev_match_result)); 1915 1916 /* 1917 * If we don't have enough space to put in another 1918 * match result, save our position and tell the 1919 * user there are more devices to check. 1920 */ 1921 if (spaceleft < sizeof(struct dev_match_result)) { 1922 bzero(&cdm->pos, sizeof(cdm->pos)); 1923 cdm->pos.position_type = 1924 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1925 1926 cdm->pos.cookie.bus = bus; 1927 cdm->pos.generations[CAM_BUS_GENERATION]= 1928 bus_generation; 1929 cdm->status = CAM_DEV_MATCH_MORE; 1930 return(0); 1931 } 1932 j = cdm->num_matches; 1933 cdm->num_matches++; 1934 cdm->matches[j].type = DEV_MATCH_BUS; 1935 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1936 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1937 cdm->matches[j].result.bus_result.unit_number = 1938 bus->sim->unit_number; 1939 strncpy(cdm->matches[j].result.bus_result.dev_name, 1940 bus->sim->sim_name, DEV_IDLEN); 1941 } 1942 1943 /* 1944 * If the user is only interested in busses, there's no 1945 * reason to descend to the next level in the tree. 1946 */ 1947 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1948 return(1); 1949 1950 /* 1951 * If there is a target generation recorded, check it to 1952 * make sure the target list hasn't changed. 1953 */ 1954 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1955 && (bus == cdm->pos.cookie.bus) 1956 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1957 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1958 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1959 bus->generation)) { 1960 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1961 return(0); 1962 } 1963 1964 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1965 && (cdm->pos.cookie.bus == bus) 1966 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1967 && (cdm->pos.cookie.target != NULL)) 1968 return(xpttargettraverse(bus, 1969 (struct cam_et *)cdm->pos.cookie.target, 1970 xptedttargetfunc, arg)); 1971 else 1972 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1973 } 1974 1975 static int 1976 xptedttargetfunc(struct cam_et *target, void *arg) 1977 { 1978 struct ccb_dev_match *cdm; 1979 1980 cdm = (struct ccb_dev_match *)arg; 1981 1982 /* 1983 * If there is a device list generation recorded, check it to 1984 * make sure the device list hasn't changed. 1985 */ 1986 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1987 && (cdm->pos.cookie.bus == target->bus) 1988 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1989 && (cdm->pos.cookie.target == target) 1990 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1991 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1992 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1993 target->generation)) { 1994 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1995 return(0); 1996 } 1997 1998 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1999 && (cdm->pos.cookie.bus == target->bus) 2000 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2001 && (cdm->pos.cookie.target == target) 2002 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2003 && (cdm->pos.cookie.device != NULL)) 2004 return(xptdevicetraverse(target, 2005 (struct cam_ed *)cdm->pos.cookie.device, 2006 xptedtdevicefunc, arg)); 2007 else 2008 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2009 } 2010 2011 static int 2012 xptedtdevicefunc(struct cam_ed *device, void *arg) 2013 { 2014 2015 struct ccb_dev_match *cdm; 2016 dev_match_ret retval; 2017 2018 cdm = (struct ccb_dev_match *)arg; 2019 2020 /* 2021 * If our position is for something deeper in the tree, that means 2022 * that we've already seen this node. So, we keep going down. 2023 */ 2024 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2025 && (cdm->pos.cookie.device == device) 2026 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2027 && (cdm->pos.cookie.periph != NULL)) 2028 retval = DM_RET_DESCEND; 2029 else 2030 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2031 device); 2032 2033 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2034 cdm->status = CAM_DEV_MATCH_ERROR; 2035 return(0); 2036 } 2037 2038 /* 2039 * If the copy flag is set, copy this device out. 2040 */ 2041 if (retval & DM_RET_COPY) { 2042 int spaceleft, j; 2043 2044 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2045 sizeof(struct dev_match_result)); 2046 2047 /* 2048 * If we don't have enough space to put in another 2049 * match result, save our position and tell the 2050 * user there are more devices to check. 2051 */ 2052 if (spaceleft < sizeof(struct dev_match_result)) { 2053 bzero(&cdm->pos, sizeof(cdm->pos)); 2054 cdm->pos.position_type = 2055 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2056 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2057 2058 cdm->pos.cookie.bus = device->target->bus; 2059 cdm->pos.generations[CAM_BUS_GENERATION]= 2060 bus_generation; 2061 cdm->pos.cookie.target = device->target; 2062 cdm->pos.generations[CAM_TARGET_GENERATION] = 2063 device->target->bus->generation; 2064 cdm->pos.cookie.device = device; 2065 cdm->pos.generations[CAM_DEV_GENERATION] = 2066 device->target->generation; 2067 cdm->status = CAM_DEV_MATCH_MORE; 2068 return(0); 2069 } 2070 j = cdm->num_matches; 2071 cdm->num_matches++; 2072 cdm->matches[j].type = DEV_MATCH_DEVICE; 2073 cdm->matches[j].result.device_result.path_id = 2074 device->target->bus->path_id; 2075 cdm->matches[j].result.device_result.target_id = 2076 device->target->target_id; 2077 cdm->matches[j].result.device_result.target_lun = 2078 device->lun_id; 2079 bcopy(&device->inq_data, 2080 &cdm->matches[j].result.device_result.inq_data, 2081 sizeof(struct scsi_inquiry_data)); 2082 2083 /* Let the user know whether this device is unconfigured */ 2084 if (device->flags & CAM_DEV_UNCONFIGURED) 2085 cdm->matches[j].result.device_result.flags = 2086 DEV_RESULT_UNCONFIGURED; 2087 else 2088 cdm->matches[j].result.device_result.flags = 2089 DEV_RESULT_NOFLAG; 2090 } 2091 2092 /* 2093 * If the user isn't interested in peripherals, don't descend 2094 * the tree any further. 2095 */ 2096 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2097 return(1); 2098 2099 /* 2100 * If there is a peripheral list generation recorded, make sure 2101 * it hasn't changed. 2102 */ 2103 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2104 && (device->target->bus == cdm->pos.cookie.bus) 2105 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2106 && (device->target == cdm->pos.cookie.target) 2107 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2108 && (device == cdm->pos.cookie.device) 2109 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2110 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2111 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2112 device->generation)){ 2113 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2114 return(0); 2115 } 2116 2117 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2118 && (cdm->pos.cookie.bus == device->target->bus) 2119 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2120 && (cdm->pos.cookie.target == device->target) 2121 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2122 && (cdm->pos.cookie.device == device) 2123 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2124 && (cdm->pos.cookie.periph != NULL)) 2125 return(xptperiphtraverse(device, 2126 (struct cam_periph *)cdm->pos.cookie.periph, 2127 xptedtperiphfunc, arg)); 2128 else 2129 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2130 } 2131 2132 static int 2133 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2134 { 2135 struct ccb_dev_match *cdm; 2136 dev_match_ret retval; 2137 2138 cdm = (struct ccb_dev_match *)arg; 2139 2140 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2141 2142 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2143 cdm->status = CAM_DEV_MATCH_ERROR; 2144 return(0); 2145 } 2146 2147 /* 2148 * If the copy flag is set, copy this peripheral out. 2149 */ 2150 if (retval & DM_RET_COPY) { 2151 int spaceleft, j; 2152 2153 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2154 sizeof(struct dev_match_result)); 2155 2156 /* 2157 * If we don't have enough space to put in another 2158 * match result, save our position and tell the 2159 * user there are more devices to check. 2160 */ 2161 if (spaceleft < sizeof(struct dev_match_result)) { 2162 bzero(&cdm->pos, sizeof(cdm->pos)); 2163 cdm->pos.position_type = 2164 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2165 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2166 CAM_DEV_POS_PERIPH; 2167 2168 cdm->pos.cookie.bus = periph->path->bus; 2169 cdm->pos.generations[CAM_BUS_GENERATION]= 2170 bus_generation; 2171 cdm->pos.cookie.target = periph->path->target; 2172 cdm->pos.generations[CAM_TARGET_GENERATION] = 2173 periph->path->bus->generation; 2174 cdm->pos.cookie.device = periph->path->device; 2175 cdm->pos.generations[CAM_DEV_GENERATION] = 2176 periph->path->target->generation; 2177 cdm->pos.cookie.periph = periph; 2178 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2179 periph->path->device->generation; 2180 cdm->status = CAM_DEV_MATCH_MORE; 2181 return(0); 2182 } 2183 2184 j = cdm->num_matches; 2185 cdm->num_matches++; 2186 cdm->matches[j].type = DEV_MATCH_PERIPH; 2187 cdm->matches[j].result.periph_result.path_id = 2188 periph->path->bus->path_id; 2189 cdm->matches[j].result.periph_result.target_id = 2190 periph->path->target->target_id; 2191 cdm->matches[j].result.periph_result.target_lun = 2192 periph->path->device->lun_id; 2193 cdm->matches[j].result.periph_result.unit_number = 2194 periph->unit_number; 2195 strncpy(cdm->matches[j].result.periph_result.periph_name, 2196 periph->periph_name, DEV_IDLEN); 2197 } 2198 2199 return(1); 2200 } 2201 2202 static int 2203 xptedtmatch(struct ccb_dev_match *cdm) 2204 { 2205 int ret; 2206 2207 cdm->num_matches = 0; 2208 2209 /* 2210 * Check the bus list generation. If it has changed, the user 2211 * needs to reset everything and start over. 2212 */ 2213 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2214 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2215 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2216 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2217 return(0); 2218 } 2219 2220 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2221 && (cdm->pos.cookie.bus != NULL)) 2222 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2223 xptedtbusfunc, cdm); 2224 else 2225 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2226 2227 /* 2228 * If we get back 0, that means that we had to stop before fully 2229 * traversing the EDT. It also means that one of the subroutines 2230 * has set the status field to the proper value. If we get back 1, 2231 * we've fully traversed the EDT and copied out any matching entries. 2232 */ 2233 if (ret == 1) 2234 cdm->status = CAM_DEV_MATCH_LAST; 2235 2236 return(ret); 2237 } 2238 2239 static int 2240 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2241 { 2242 struct ccb_dev_match *cdm; 2243 2244 cdm = (struct ccb_dev_match *)arg; 2245 2246 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2247 && (cdm->pos.cookie.pdrv == pdrv) 2248 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2249 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2250 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2251 (*pdrv)->generation)) { 2252 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2253 return(0); 2254 } 2255 2256 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2257 && (cdm->pos.cookie.pdrv == pdrv) 2258 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2259 && (cdm->pos.cookie.periph != NULL)) 2260 return(xptpdperiphtraverse(pdrv, 2261 (struct cam_periph *)cdm->pos.cookie.periph, 2262 xptplistperiphfunc, arg)); 2263 else 2264 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2265 } 2266 2267 static int 2268 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2269 { 2270 struct ccb_dev_match *cdm; 2271 dev_match_ret retval; 2272 2273 cdm = (struct ccb_dev_match *)arg; 2274 2275 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2276 2277 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2278 cdm->status = CAM_DEV_MATCH_ERROR; 2279 return(0); 2280 } 2281 2282 /* 2283 * If the copy flag is set, copy this peripheral out. 2284 */ 2285 if (retval & DM_RET_COPY) { 2286 int spaceleft, j; 2287 2288 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2289 sizeof(struct dev_match_result)); 2290 2291 /* 2292 * If we don't have enough space to put in another 2293 * match result, save our position and tell the 2294 * user there are more devices to check. 2295 */ 2296 if (spaceleft < sizeof(struct dev_match_result)) { 2297 struct periph_driver **pdrv; 2298 2299 pdrv = NULL; 2300 bzero(&cdm->pos, sizeof(cdm->pos)); 2301 cdm->pos.position_type = 2302 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2303 CAM_DEV_POS_PERIPH; 2304 2305 /* 2306 * This may look a bit non-sensical, but it is 2307 * actually quite logical. There are very few 2308 * peripheral drivers, and bloating every peripheral 2309 * structure with a pointer back to its parent 2310 * peripheral driver linker set entry would cost 2311 * more in the long run than doing this quick lookup. 2312 */ 2313 SET_FOREACH(pdrv, periphdriver_set) { 2314 if (strcmp((*pdrv)->driver_name, 2315 periph->periph_name) == 0) 2316 break; 2317 } 2318 2319 if (*pdrv == NULL) { 2320 cdm->status = CAM_DEV_MATCH_ERROR; 2321 return(0); 2322 } 2323 2324 cdm->pos.cookie.pdrv = pdrv; 2325 /* 2326 * The periph generation slot does double duty, as 2327 * does the periph pointer slot. They are used for 2328 * both edt and pdrv lookups and positioning. 2329 */ 2330 cdm->pos.cookie.periph = periph; 2331 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2332 (*pdrv)->generation; 2333 cdm->status = CAM_DEV_MATCH_MORE; 2334 return(0); 2335 } 2336 2337 j = cdm->num_matches; 2338 cdm->num_matches++; 2339 cdm->matches[j].type = DEV_MATCH_PERIPH; 2340 cdm->matches[j].result.periph_result.path_id = 2341 periph->path->bus->path_id; 2342 2343 /* 2344 * The transport layer peripheral doesn't have a target or 2345 * lun. 2346 */ 2347 if (periph->path->target) 2348 cdm->matches[j].result.periph_result.target_id = 2349 periph->path->target->target_id; 2350 else 2351 cdm->matches[j].result.periph_result.target_id = -1; 2352 2353 if (periph->path->device) 2354 cdm->matches[j].result.periph_result.target_lun = 2355 periph->path->device->lun_id; 2356 else 2357 cdm->matches[j].result.periph_result.target_lun = -1; 2358 2359 cdm->matches[j].result.periph_result.unit_number = 2360 periph->unit_number; 2361 strncpy(cdm->matches[j].result.periph_result.periph_name, 2362 periph->periph_name, DEV_IDLEN); 2363 } 2364 2365 return(1); 2366 } 2367 2368 static int 2369 xptperiphlistmatch(struct ccb_dev_match *cdm) 2370 { 2371 int ret; 2372 2373 cdm->num_matches = 0; 2374 2375 /* 2376 * At this point in the edt traversal function, we check the bus 2377 * list generation to make sure that no busses have been added or 2378 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2379 * For the peripheral driver list traversal function, however, we 2380 * don't have to worry about new peripheral driver types coming or 2381 * going; they're in a linker set, and therefore can't change 2382 * without a recompile. 2383 */ 2384 2385 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2386 && (cdm->pos.cookie.pdrv != NULL)) 2387 ret = xptpdrvtraverse( 2388 (struct periph_driver **)cdm->pos.cookie.pdrv, 2389 xptplistpdrvfunc, cdm); 2390 else 2391 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2392 2393 /* 2394 * If we get back 0, that means that we had to stop before fully 2395 * traversing the peripheral driver tree. It also means that one of 2396 * the subroutines has set the status field to the proper value. If 2397 * we get back 1, we've fully traversed the EDT and copied out any 2398 * matching entries. 2399 */ 2400 if (ret == 1) 2401 cdm->status = CAM_DEV_MATCH_LAST; 2402 2403 return(ret); 2404 } 2405 2406 static int 2407 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2408 { 2409 struct cam_eb *bus, *next_bus; 2410 int retval; 2411 2412 retval = 1; 2413 2414 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2415 bus != NULL; 2416 bus = next_bus) { 2417 next_bus = TAILQ_NEXT(bus, links); 2418 2419 retval = tr_func(bus, arg); 2420 if (retval == 0) 2421 return(retval); 2422 } 2423 2424 return(retval); 2425 } 2426 2427 static int 2428 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2429 xpt_targetfunc_t *tr_func, void *arg) 2430 { 2431 struct cam_et *target, *next_target; 2432 int retval; 2433 2434 retval = 1; 2435 for (target = (start_target ? start_target : 2436 TAILQ_FIRST(&bus->et_entries)); 2437 target != NULL; target = next_target) { 2438 2439 next_target = TAILQ_NEXT(target, links); 2440 2441 retval = tr_func(target, arg); 2442 2443 if (retval == 0) 2444 return(retval); 2445 } 2446 2447 return(retval); 2448 } 2449 2450 static int 2451 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2452 xpt_devicefunc_t *tr_func, void *arg) 2453 { 2454 struct cam_ed *device, *next_device; 2455 int retval; 2456 2457 retval = 1; 2458 for (device = (start_device ? start_device : 2459 TAILQ_FIRST(&target->ed_entries)); 2460 device != NULL; 2461 device = next_device) { 2462 2463 next_device = TAILQ_NEXT(device, links); 2464 2465 retval = tr_func(device, arg); 2466 2467 if (retval == 0) 2468 return(retval); 2469 } 2470 2471 return(retval); 2472 } 2473 2474 static int 2475 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2476 xpt_periphfunc_t *tr_func, void *arg) 2477 { 2478 struct cam_periph *periph, *next_periph; 2479 int retval; 2480 2481 retval = 1; 2482 2483 for (periph = (start_periph ? start_periph : 2484 SLIST_FIRST(&device->periphs)); 2485 periph != NULL; 2486 periph = next_periph) { 2487 2488 next_periph = SLIST_NEXT(periph, periph_links); 2489 2490 retval = tr_func(periph, arg); 2491 if (retval == 0) 2492 return(retval); 2493 } 2494 2495 return(retval); 2496 } 2497 2498 static int 2499 xptpdrvtraverse(struct periph_driver **start_pdrv, 2500 xpt_pdrvfunc_t *tr_func, void *arg) 2501 { 2502 struct periph_driver **pdrv; 2503 int retval; 2504 2505 retval = 1; 2506 2507 /* 2508 * We don't traverse the peripheral driver list like we do the 2509 * other lists, because it is a linker set, and therefore cannot be 2510 * changed during runtime. If the peripheral driver list is ever 2511 * re-done to be something other than a linker set (i.e. it can 2512 * change while the system is running), the list traversal should 2513 * be modified to work like the other traversal functions. 2514 */ 2515 SET_FOREACH(pdrv, periphdriver_set) { 2516 if (start_pdrv == NULL || start_pdrv == pdrv) { 2517 retval = tr_func(pdrv, arg); 2518 if (retval == 0) 2519 return(retval); 2520 start_pdrv = NULL; /* traverse remainder */ 2521 } 2522 } 2523 return(retval); 2524 } 2525 2526 static int 2527 xptpdperiphtraverse(struct periph_driver **pdrv, 2528 struct cam_periph *start_periph, 2529 xpt_periphfunc_t *tr_func, void *arg) 2530 { 2531 struct cam_periph *periph, *next_periph; 2532 int retval; 2533 2534 retval = 1; 2535 2536 for (periph = (start_periph ? start_periph : 2537 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2538 periph = next_periph) { 2539 2540 next_periph = TAILQ_NEXT(periph, unit_links); 2541 2542 retval = tr_func(periph, arg); 2543 if (retval == 0) 2544 return(retval); 2545 } 2546 return(retval); 2547 } 2548 2549 static int 2550 xptdefbusfunc(struct cam_eb *bus, void *arg) 2551 { 2552 struct xpt_traverse_config *tr_config; 2553 2554 tr_config = (struct xpt_traverse_config *)arg; 2555 2556 if (tr_config->depth == XPT_DEPTH_BUS) { 2557 xpt_busfunc_t *tr_func; 2558 2559 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2560 2561 return(tr_func(bus, tr_config->tr_arg)); 2562 } else 2563 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2564 } 2565 2566 static int 2567 xptdeftargetfunc(struct cam_et *target, void *arg) 2568 { 2569 struct xpt_traverse_config *tr_config; 2570 2571 tr_config = (struct xpt_traverse_config *)arg; 2572 2573 if (tr_config->depth == XPT_DEPTH_TARGET) { 2574 xpt_targetfunc_t *tr_func; 2575 2576 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2577 2578 return(tr_func(target, tr_config->tr_arg)); 2579 } else 2580 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2581 } 2582 2583 static int 2584 xptdefdevicefunc(struct cam_ed *device, void *arg) 2585 { 2586 struct xpt_traverse_config *tr_config; 2587 2588 tr_config = (struct xpt_traverse_config *)arg; 2589 2590 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2591 xpt_devicefunc_t *tr_func; 2592 2593 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2594 2595 return(tr_func(device, tr_config->tr_arg)); 2596 } else 2597 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2598 } 2599 2600 static int 2601 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2602 { 2603 struct xpt_traverse_config *tr_config; 2604 xpt_periphfunc_t *tr_func; 2605 2606 tr_config = (struct xpt_traverse_config *)arg; 2607 2608 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2609 2610 /* 2611 * Unlike the other default functions, we don't check for depth 2612 * here. The peripheral driver level is the last level in the EDT, 2613 * so if we're here, we should execute the function in question. 2614 */ 2615 return(tr_func(periph, tr_config->tr_arg)); 2616 } 2617 2618 /* 2619 * Execute the given function for every bus in the EDT. 2620 */ 2621 static int 2622 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2623 { 2624 struct xpt_traverse_config tr_config; 2625 2626 tr_config.depth = XPT_DEPTH_BUS; 2627 tr_config.tr_func = tr_func; 2628 tr_config.tr_arg = arg; 2629 2630 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2631 } 2632 2633 #ifdef notusedyet 2634 /* 2635 * Execute the given function for every target in the EDT. 2636 */ 2637 static int 2638 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2639 { 2640 struct xpt_traverse_config tr_config; 2641 2642 tr_config.depth = XPT_DEPTH_TARGET; 2643 tr_config.tr_func = tr_func; 2644 tr_config.tr_arg = arg; 2645 2646 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2647 } 2648 #endif /* notusedyet */ 2649 2650 /* 2651 * Execute the given function for every device in the EDT. 2652 */ 2653 static int 2654 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2655 { 2656 struct xpt_traverse_config tr_config; 2657 2658 tr_config.depth = XPT_DEPTH_DEVICE; 2659 tr_config.tr_func = tr_func; 2660 tr_config.tr_arg = arg; 2661 2662 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2663 } 2664 2665 #ifdef notusedyet 2666 /* 2667 * Execute the given function for every peripheral in the EDT. 2668 */ 2669 static int 2670 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2671 { 2672 struct xpt_traverse_config tr_config; 2673 2674 tr_config.depth = XPT_DEPTH_PERIPH; 2675 tr_config.tr_func = tr_func; 2676 tr_config.tr_arg = arg; 2677 2678 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2679 } 2680 #endif /* notusedyet */ 2681 2682 static int 2683 xptsetasyncfunc(struct cam_ed *device, void *arg) 2684 { 2685 struct cam_path path; 2686 struct ccb_getdev cgd; 2687 struct async_node *cur_entry; 2688 2689 cur_entry = (struct async_node *)arg; 2690 2691 /* 2692 * Don't report unconfigured devices (Wildcard devs, 2693 * devices only for target mode, device instances 2694 * that have been invalidated but are waiting for 2695 * their last reference count to be released). 2696 */ 2697 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2698 return (1); 2699 2700 xpt_compile_path(&path, 2701 NULL, 2702 device->target->bus->path_id, 2703 device->target->target_id, 2704 device->lun_id); 2705 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2706 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2707 xpt_action((union ccb *)&cgd); 2708 cur_entry->callback(cur_entry->callback_arg, 2709 AC_FOUND_DEVICE, 2710 &path, &cgd); 2711 xpt_release_path(&path); 2712 2713 return(1); 2714 } 2715 2716 static int 2717 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2718 { 2719 struct cam_path path; 2720 struct ccb_pathinq cpi; 2721 struct async_node *cur_entry; 2722 2723 cur_entry = (struct async_node *)arg; 2724 2725 xpt_compile_path(&path, /*periph*/NULL, 2726 bus->sim->path_id, 2727 CAM_TARGET_WILDCARD, 2728 CAM_LUN_WILDCARD); 2729 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2730 cpi.ccb_h.func_code = XPT_PATH_INQ; 2731 xpt_action((union ccb *)&cpi); 2732 cur_entry->callback(cur_entry->callback_arg, 2733 AC_PATH_REGISTERED, 2734 &path, &cpi); 2735 xpt_release_path(&path); 2736 2737 return(1); 2738 } 2739 2740 void 2741 xpt_action(union ccb *start_ccb) 2742 { 2743 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2744 2745 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2746 2747 crit_enter(); 2748 2749 switch (start_ccb->ccb_h.func_code) { 2750 case XPT_SCSI_IO: 2751 { 2752 #ifdef CAMDEBUG 2753 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2754 struct cam_path *path; 2755 2756 path = start_ccb->ccb_h.path; 2757 #endif 2758 2759 /* 2760 * For the sake of compatibility with SCSI-1 2761 * devices that may not understand the identify 2762 * message, we include lun information in the 2763 * second byte of all commands. SCSI-1 specifies 2764 * that luns are a 3 bit value and reserves only 3 2765 * bits for lun information in the CDB. Later 2766 * revisions of the SCSI spec allow for more than 8 2767 * luns, but have deprecated lun information in the 2768 * CDB. So, if the lun won't fit, we must omit. 2769 * 2770 * Also be aware that during initial probing for devices, 2771 * the inquiry information is unknown but initialized to 0. 2772 * This means that this code will be exercised while probing 2773 * devices with an ANSI revision greater than 2. 2774 */ 2775 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2776 && start_ccb->ccb_h.target_lun < 8 2777 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2778 2779 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2780 start_ccb->ccb_h.target_lun << 5; 2781 } 2782 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2783 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2784 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2785 &path->device->inq_data), 2786 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2787 cdb_str, sizeof(cdb_str)))); 2788 /* FALLTHROUGH */ 2789 } 2790 case XPT_TARGET_IO: 2791 case XPT_CONT_TARGET_IO: 2792 start_ccb->csio.sense_resid = 0; 2793 start_ccb->csio.resid = 0; 2794 /* FALLTHROUGH */ 2795 case XPT_RESET_DEV: 2796 case XPT_ENG_EXEC: 2797 { 2798 struct cam_path *path; 2799 int runq; 2800 2801 path = start_ccb->ccb_h.path; 2802 2803 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2804 if (path->device->qfrozen_cnt == 0) 2805 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2806 else 2807 runq = 0; 2808 if (runq != 0) 2809 xpt_run_dev_sendq(path->bus); 2810 break; 2811 } 2812 case XPT_SET_TRAN_SETTINGS: 2813 { 2814 xpt_set_transfer_settings(&start_ccb->cts, 2815 start_ccb->ccb_h.path->device, 2816 /*async_update*/FALSE); 2817 break; 2818 } 2819 case XPT_CALC_GEOMETRY: 2820 { 2821 struct cam_sim *sim; 2822 2823 /* Filter out garbage */ 2824 if (start_ccb->ccg.block_size == 0 2825 || start_ccb->ccg.volume_size == 0) { 2826 start_ccb->ccg.cylinders = 0; 2827 start_ccb->ccg.heads = 0; 2828 start_ccb->ccg.secs_per_track = 0; 2829 start_ccb->ccb_h.status = CAM_REQ_CMP; 2830 break; 2831 } 2832 sim = start_ccb->ccb_h.path->bus->sim; 2833 (*(sim->sim_action))(sim, start_ccb); 2834 break; 2835 } 2836 case XPT_ABORT: 2837 { 2838 union ccb* abort_ccb; 2839 2840 abort_ccb = start_ccb->cab.abort_ccb; 2841 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2842 2843 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2844 struct cam_ccbq *ccbq; 2845 2846 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 2847 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2848 abort_ccb->ccb_h.status = 2849 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2850 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2851 xpt_done(abort_ccb); 2852 start_ccb->ccb_h.status = CAM_REQ_CMP; 2853 break; 2854 } 2855 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2856 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2857 /* 2858 * We've caught this ccb en route to 2859 * the SIM. Flag it for abort and the 2860 * SIM will do so just before starting 2861 * real work on the CCB. 2862 */ 2863 abort_ccb->ccb_h.status = 2864 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2865 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2866 start_ccb->ccb_h.status = CAM_REQ_CMP; 2867 break; 2868 } 2869 } 2870 if (XPT_FC_IS_QUEUED(abort_ccb) 2871 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2872 /* 2873 * It's already completed but waiting 2874 * for our SWI to get to it. 2875 */ 2876 start_ccb->ccb_h.status = CAM_UA_ABORT; 2877 break; 2878 } 2879 /* 2880 * If we weren't able to take care of the abort request 2881 * in the XPT, pass the request down to the SIM for processing. 2882 */ 2883 /* FALLTHROUGH */ 2884 } 2885 case XPT_ACCEPT_TARGET_IO: 2886 case XPT_EN_LUN: 2887 case XPT_IMMED_NOTIFY: 2888 case XPT_NOTIFY_ACK: 2889 case XPT_GET_TRAN_SETTINGS: 2890 case XPT_RESET_BUS: 2891 { 2892 struct cam_sim *sim; 2893 2894 sim = start_ccb->ccb_h.path->bus->sim; 2895 (*(sim->sim_action))(sim, start_ccb); 2896 break; 2897 } 2898 case XPT_PATH_INQ: 2899 { 2900 struct cam_sim *sim; 2901 2902 sim = start_ccb->ccb_h.path->bus->sim; 2903 (*(sim->sim_action))(sim, start_ccb); 2904 break; 2905 } 2906 case XPT_PATH_STATS: 2907 start_ccb->cpis.last_reset = 2908 start_ccb->ccb_h.path->bus->last_reset; 2909 start_ccb->ccb_h.status = CAM_REQ_CMP; 2910 break; 2911 case XPT_GDEV_TYPE: 2912 { 2913 struct cam_ed *dev; 2914 2915 dev = start_ccb->ccb_h.path->device; 2916 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2917 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2918 } else { 2919 struct ccb_getdev *cgd; 2920 struct cam_eb *bus; 2921 struct cam_et *tar; 2922 2923 cgd = &start_ccb->cgd; 2924 bus = cgd->ccb_h.path->bus; 2925 tar = cgd->ccb_h.path->target; 2926 cgd->inq_data = dev->inq_data; 2927 cgd->ccb_h.status = CAM_REQ_CMP; 2928 cgd->serial_num_len = dev->serial_num_len; 2929 if ((dev->serial_num_len > 0) 2930 && (dev->serial_num != NULL)) 2931 bcopy(dev->serial_num, cgd->serial_num, 2932 dev->serial_num_len); 2933 } 2934 break; 2935 } 2936 case XPT_GDEV_STATS: 2937 { 2938 struct cam_ed *dev; 2939 2940 dev = start_ccb->ccb_h.path->device; 2941 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2942 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2943 } else { 2944 struct ccb_getdevstats *cgds; 2945 struct cam_eb *bus; 2946 struct cam_et *tar; 2947 2948 cgds = &start_ccb->cgds; 2949 bus = cgds->ccb_h.path->bus; 2950 tar = cgds->ccb_h.path->target; 2951 cgds->dev_openings = dev->ccbq.dev_openings; 2952 cgds->dev_active = dev->ccbq.dev_active; 2953 cgds->devq_openings = dev->ccbq.devq_openings; 2954 cgds->devq_queued = dev->ccbq.queue.entries; 2955 cgds->held = dev->ccbq.held; 2956 cgds->last_reset = tar->last_reset; 2957 cgds->maxtags = dev->quirk->maxtags; 2958 cgds->mintags = dev->quirk->mintags; 2959 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2960 cgds->last_reset = bus->last_reset; 2961 cgds->ccb_h.status = CAM_REQ_CMP; 2962 } 2963 break; 2964 } 2965 case XPT_GDEVLIST: 2966 { 2967 struct cam_periph *nperiph; 2968 struct periph_list *periph_head; 2969 struct ccb_getdevlist *cgdl; 2970 int i; 2971 struct cam_ed *device; 2972 int found; 2973 2974 2975 found = 0; 2976 2977 /* 2978 * Don't want anyone mucking with our data. 2979 */ 2980 device = start_ccb->ccb_h.path->device; 2981 periph_head = &device->periphs; 2982 cgdl = &start_ccb->cgdl; 2983 2984 /* 2985 * Check and see if the list has changed since the user 2986 * last requested a list member. If so, tell them that the 2987 * list has changed, and therefore they need to start over 2988 * from the beginning. 2989 */ 2990 if ((cgdl->index != 0) && 2991 (cgdl->generation != device->generation)) { 2992 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2993 break; 2994 } 2995 2996 /* 2997 * Traverse the list of peripherals and attempt to find 2998 * the requested peripheral. 2999 */ 3000 for (nperiph = periph_head->slh_first, i = 0; 3001 (nperiph != NULL) && (i <= cgdl->index); 3002 nperiph = nperiph->periph_links.sle_next, i++) { 3003 if (i == cgdl->index) { 3004 strncpy(cgdl->periph_name, 3005 nperiph->periph_name, 3006 DEV_IDLEN); 3007 cgdl->unit_number = nperiph->unit_number; 3008 found = 1; 3009 } 3010 } 3011 if (found == 0) { 3012 cgdl->status = CAM_GDEVLIST_ERROR; 3013 break; 3014 } 3015 3016 if (nperiph == NULL) 3017 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3018 else 3019 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3020 3021 cgdl->index++; 3022 cgdl->generation = device->generation; 3023 3024 cgdl->ccb_h.status = CAM_REQ_CMP; 3025 break; 3026 } 3027 case XPT_DEV_MATCH: 3028 { 3029 dev_pos_type position_type; 3030 struct ccb_dev_match *cdm; 3031 int ret; 3032 3033 cdm = &start_ccb->cdm; 3034 3035 /* 3036 * Prevent EDT changes while we traverse it. 3037 */ 3038 /* 3039 * There are two ways of getting at information in the EDT. 3040 * The first way is via the primary EDT tree. It starts 3041 * with a list of busses, then a list of targets on a bus, 3042 * then devices/luns on a target, and then peripherals on a 3043 * device/lun. The "other" way is by the peripheral driver 3044 * lists. The peripheral driver lists are organized by 3045 * peripheral driver. (obviously) So it makes sense to 3046 * use the peripheral driver list if the user is looking 3047 * for something like "da1", or all "da" devices. If the 3048 * user is looking for something on a particular bus/target 3049 * or lun, it's generally better to go through the EDT tree. 3050 */ 3051 3052 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3053 position_type = cdm->pos.position_type; 3054 else { 3055 int i; 3056 3057 position_type = CAM_DEV_POS_NONE; 3058 3059 for (i = 0; i < cdm->num_patterns; i++) { 3060 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3061 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3062 position_type = CAM_DEV_POS_EDT; 3063 break; 3064 } 3065 } 3066 3067 if (cdm->num_patterns == 0) 3068 position_type = CAM_DEV_POS_EDT; 3069 else if (position_type == CAM_DEV_POS_NONE) 3070 position_type = CAM_DEV_POS_PDRV; 3071 } 3072 3073 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3074 case CAM_DEV_POS_EDT: 3075 ret = xptedtmatch(cdm); 3076 break; 3077 case CAM_DEV_POS_PDRV: 3078 ret = xptperiphlistmatch(cdm); 3079 break; 3080 default: 3081 cdm->status = CAM_DEV_MATCH_ERROR; 3082 break; 3083 } 3084 3085 if (cdm->status == CAM_DEV_MATCH_ERROR) 3086 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3087 else 3088 start_ccb->ccb_h.status = CAM_REQ_CMP; 3089 3090 break; 3091 } 3092 case XPT_SASYNC_CB: 3093 { 3094 struct ccb_setasync *csa; 3095 struct async_node *cur_entry; 3096 struct async_list *async_head; 3097 u_int32_t added; 3098 3099 csa = &start_ccb->csa; 3100 added = csa->event_enable; 3101 async_head = &csa->ccb_h.path->device->asyncs; 3102 3103 /* 3104 * If there is already an entry for us, simply 3105 * update it. 3106 */ 3107 cur_entry = SLIST_FIRST(async_head); 3108 while (cur_entry != NULL) { 3109 if ((cur_entry->callback_arg == csa->callback_arg) 3110 && (cur_entry->callback == csa->callback)) 3111 break; 3112 cur_entry = SLIST_NEXT(cur_entry, links); 3113 } 3114 3115 if (cur_entry != NULL) { 3116 /* 3117 * If the request has no flags set, 3118 * remove the entry. 3119 */ 3120 added &= ~cur_entry->event_enable; 3121 if (csa->event_enable == 0) { 3122 SLIST_REMOVE(async_head, cur_entry, 3123 async_node, links); 3124 csa->ccb_h.path->device->refcount--; 3125 kfree(cur_entry, M_DEVBUF); 3126 } else { 3127 cur_entry->event_enable = csa->event_enable; 3128 } 3129 } else { 3130 cur_entry = kmalloc(sizeof(*cur_entry), 3131 M_DEVBUF, M_INTWAIT); 3132 cur_entry->event_enable = csa->event_enable; 3133 cur_entry->callback_arg = csa->callback_arg; 3134 cur_entry->callback = csa->callback; 3135 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3136 csa->ccb_h.path->device->refcount++; 3137 } 3138 3139 if ((added & AC_FOUND_DEVICE) != 0) { 3140 /* 3141 * Get this peripheral up to date with all 3142 * the currently existing devices. 3143 */ 3144 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3145 } 3146 if ((added & AC_PATH_REGISTERED) != 0) { 3147 /* 3148 * Get this peripheral up to date with all 3149 * the currently existing busses. 3150 */ 3151 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3152 } 3153 start_ccb->ccb_h.status = CAM_REQ_CMP; 3154 break; 3155 } 3156 case XPT_REL_SIMQ: 3157 { 3158 struct ccb_relsim *crs; 3159 struct cam_ed *dev; 3160 3161 crs = &start_ccb->crs; 3162 dev = crs->ccb_h.path->device; 3163 if (dev == NULL) { 3164 3165 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3166 break; 3167 } 3168 3169 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3170 3171 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3172 3173 /* Don't ever go below one opening */ 3174 if (crs->openings > 0) { 3175 xpt_dev_ccbq_resize(crs->ccb_h.path, 3176 crs->openings); 3177 3178 if (bootverbose) { 3179 xpt_print_path(crs->ccb_h.path); 3180 kprintf("tagged openings " 3181 "now %d\n", 3182 crs->openings); 3183 } 3184 } 3185 } 3186 } 3187 3188 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3189 3190 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3191 3192 /* 3193 * Just extend the old timeout and decrement 3194 * the freeze count so that a single timeout 3195 * is sufficient for releasing the queue. 3196 */ 3197 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3198 callout_stop(&dev->c_handle); 3199 } else { 3200 3201 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3202 } 3203 3204 callout_reset(&dev->c_handle, 3205 (crs->release_timeout * hz) / 1000, 3206 xpt_release_devq_timeout, dev); 3207 3208 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3209 3210 } 3211 3212 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3213 3214 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3215 /* 3216 * Decrement the freeze count so that a single 3217 * completion is still sufficient to unfreeze 3218 * the queue. 3219 */ 3220 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3221 } else { 3222 3223 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3224 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3225 } 3226 } 3227 3228 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3229 3230 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3231 || (dev->ccbq.dev_active == 0)) { 3232 3233 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3234 } else { 3235 3236 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3237 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3238 } 3239 } 3240 3241 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3242 3243 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3244 /*run_queue*/TRUE); 3245 } 3246 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3247 start_ccb->ccb_h.status = CAM_REQ_CMP; 3248 break; 3249 } 3250 case XPT_SCAN_BUS: 3251 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3252 break; 3253 case XPT_SCAN_LUN: 3254 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3255 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3256 start_ccb); 3257 break; 3258 case XPT_DEBUG: { 3259 #ifdef CAMDEBUG 3260 #ifdef CAM_DEBUG_DELAY 3261 cam_debug_delay = CAM_DEBUG_DELAY; 3262 #endif 3263 cam_dflags = start_ccb->cdbg.flags; 3264 if (cam_dpath != NULL) { 3265 xpt_free_path(cam_dpath); 3266 cam_dpath = NULL; 3267 } 3268 3269 if (cam_dflags != CAM_DEBUG_NONE) { 3270 if (xpt_create_path(&cam_dpath, xpt_periph, 3271 start_ccb->ccb_h.path_id, 3272 start_ccb->ccb_h.target_id, 3273 start_ccb->ccb_h.target_lun) != 3274 CAM_REQ_CMP) { 3275 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3276 cam_dflags = CAM_DEBUG_NONE; 3277 } else { 3278 start_ccb->ccb_h.status = CAM_REQ_CMP; 3279 xpt_print_path(cam_dpath); 3280 kprintf("debugging flags now %x\n", cam_dflags); 3281 } 3282 } else { 3283 cam_dpath = NULL; 3284 start_ccb->ccb_h.status = CAM_REQ_CMP; 3285 } 3286 #else /* !CAMDEBUG */ 3287 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3288 #endif /* CAMDEBUG */ 3289 break; 3290 } 3291 case XPT_NOOP: 3292 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3293 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3294 start_ccb->ccb_h.status = CAM_REQ_CMP; 3295 break; 3296 default: 3297 case XPT_SDEV_TYPE: 3298 case XPT_TERM_IO: 3299 case XPT_ENG_INQ: 3300 /* XXX Implement */ 3301 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3302 break; 3303 } 3304 crit_exit(); 3305 } 3306 3307 void 3308 xpt_polled_action(union ccb *start_ccb) 3309 { 3310 u_int32_t timeout; 3311 struct cam_sim *sim; 3312 struct cam_devq *devq; 3313 struct cam_ed *dev; 3314 3315 timeout = start_ccb->ccb_h.timeout; 3316 sim = start_ccb->ccb_h.path->bus->sim; 3317 devq = sim->devq; 3318 dev = start_ccb->ccb_h.path->device; 3319 3320 crit_enter(); 3321 3322 /* 3323 * Steal an opening so that no other queued requests 3324 * can get it before us while we simulate interrupts. 3325 */ 3326 dev->ccbq.devq_openings--; 3327 dev->ccbq.dev_openings--; 3328 3329 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3330 && (--timeout > 0)) { 3331 DELAY(1000); 3332 (*(sim->sim_poll))(sim); 3333 swi_camnet(NULL, NULL); 3334 swi_cambio(NULL, NULL); 3335 } 3336 3337 dev->ccbq.devq_openings++; 3338 dev->ccbq.dev_openings++; 3339 3340 if (timeout != 0) { 3341 xpt_action(start_ccb); 3342 while(--timeout > 0) { 3343 (*(sim->sim_poll))(sim); 3344 swi_camnet(NULL, NULL); 3345 swi_cambio(NULL, NULL); 3346 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3347 != CAM_REQ_INPROG) 3348 break; 3349 DELAY(1000); 3350 } 3351 if (timeout == 0) { 3352 /* 3353 * XXX Is it worth adding a sim_timeout entry 3354 * point so we can attempt recovery? If 3355 * this is only used for dumps, I don't think 3356 * it is. 3357 */ 3358 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3359 } 3360 } else { 3361 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3362 } 3363 crit_exit(); 3364 } 3365 3366 /* 3367 * Schedule a peripheral driver to receive a ccb when it's 3368 * target device has space for more transactions. 3369 */ 3370 void 3371 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3372 { 3373 struct cam_ed *device; 3374 int runq; 3375 3376 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3377 device = perph->path->device; 3378 crit_enter(); 3379 if (periph_is_queued(perph)) { 3380 /* Simply reorder based on new priority */ 3381 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3382 (" change priority to %d\n", new_priority)); 3383 if (new_priority < perph->pinfo.priority) { 3384 camq_change_priority(&device->drvq, 3385 perph->pinfo.index, 3386 new_priority); 3387 } 3388 runq = 0; 3389 } else { 3390 /* New entry on the queue */ 3391 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3392 (" added periph to queue\n")); 3393 perph->pinfo.priority = new_priority; 3394 perph->pinfo.generation = ++device->drvq.generation; 3395 camq_insert(&device->drvq, &perph->pinfo); 3396 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3397 } 3398 crit_exit(); 3399 if (runq != 0) { 3400 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3401 (" calling xpt_run_devq\n")); 3402 xpt_run_dev_allocq(perph->path->bus); 3403 } 3404 } 3405 3406 3407 /* 3408 * Schedule a device to run on a given queue. 3409 * If the device was inserted as a new entry on the queue, 3410 * return 1 meaning the device queue should be run. If we 3411 * were already queued, implying someone else has already 3412 * started the queue, return 0 so the caller doesn't attempt 3413 * to run the queue. Must be run in a critical section. 3414 */ 3415 static int 3416 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3417 u_int32_t new_priority) 3418 { 3419 int retval; 3420 u_int32_t old_priority; 3421 3422 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3423 3424 old_priority = pinfo->priority; 3425 3426 /* 3427 * Are we already queued? 3428 */ 3429 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3430 /* Simply reorder based on new priority */ 3431 if (new_priority < old_priority) { 3432 camq_change_priority(queue, pinfo->index, 3433 new_priority); 3434 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3435 ("changed priority to %d\n", 3436 new_priority)); 3437 } 3438 retval = 0; 3439 } else { 3440 /* New entry on the queue */ 3441 if (new_priority < old_priority) 3442 pinfo->priority = new_priority; 3443 3444 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3445 ("Inserting onto queue\n")); 3446 pinfo->generation = ++queue->generation; 3447 camq_insert(queue, pinfo); 3448 retval = 1; 3449 } 3450 return (retval); 3451 } 3452 3453 static void 3454 xpt_run_dev_allocq(struct cam_eb *bus) 3455 { 3456 struct cam_devq *devq; 3457 3458 if ((devq = bus->sim->devq) == NULL) { 3459 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3460 return; 3461 } 3462 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3463 3464 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3465 (" qfrozen_cnt == 0x%x, entries == %d, " 3466 "openings == %d, active == %d\n", 3467 devq->alloc_queue.qfrozen_cnt, 3468 devq->alloc_queue.entries, 3469 devq->alloc_openings, 3470 devq->alloc_active)); 3471 3472 crit_enter(); 3473 devq->alloc_queue.qfrozen_cnt++; 3474 while ((devq->alloc_queue.entries > 0) 3475 && (devq->alloc_openings > 0) 3476 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3477 struct cam_ed_qinfo *qinfo; 3478 struct cam_ed *device; 3479 union ccb *work_ccb; 3480 struct cam_periph *drv; 3481 struct camq *drvq; 3482 3483 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3484 CAMQ_HEAD); 3485 device = qinfo->device; 3486 3487 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3488 ("running device %p\n", device)); 3489 3490 drvq = &device->drvq; 3491 3492 #ifdef CAMDEBUG 3493 if (drvq->entries <= 0) { 3494 panic("xpt_run_dev_allocq: " 3495 "Device on queue without any work to do"); 3496 } 3497 #endif 3498 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3499 devq->alloc_openings--; 3500 devq->alloc_active++; 3501 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3502 crit_exit(); 3503 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3504 drv->pinfo.priority); 3505 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3506 ("calling periph start\n")); 3507 drv->periph_start(drv, work_ccb); 3508 } else { 3509 /* 3510 * Malloc failure in alloc_ccb 3511 */ 3512 /* 3513 * XXX add us to a list to be run from free_ccb 3514 * if we don't have any ccbs active on this 3515 * device queue otherwise we may never get run 3516 * again. 3517 */ 3518 break; 3519 } 3520 3521 /* Raise IPL for possible insertion and test at top of loop */ 3522 crit_enter(); 3523 3524 if (drvq->entries > 0) { 3525 /* We have more work. Attempt to reschedule */ 3526 xpt_schedule_dev_allocq(bus, device); 3527 } 3528 } 3529 devq->alloc_queue.qfrozen_cnt--; 3530 crit_exit(); 3531 } 3532 3533 static void 3534 xpt_run_dev_sendq(struct cam_eb *bus) 3535 { 3536 struct cam_devq *devq; 3537 3538 if ((devq = bus->sim->devq) == NULL) { 3539 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3540 return; 3541 } 3542 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3543 3544 crit_enter(); 3545 devq->send_queue.qfrozen_cnt++; 3546 while ((devq->send_queue.entries > 0) 3547 && (devq->send_openings > 0)) { 3548 struct cam_ed_qinfo *qinfo; 3549 struct cam_ed *device; 3550 union ccb *work_ccb; 3551 struct cam_sim *sim; 3552 3553 if (devq->send_queue.qfrozen_cnt > 1) { 3554 break; 3555 } 3556 3557 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3558 CAMQ_HEAD); 3559 device = qinfo->device; 3560 3561 /* 3562 * If the device has been "frozen", don't attempt 3563 * to run it. 3564 */ 3565 if (device->qfrozen_cnt > 0) { 3566 continue; 3567 } 3568 3569 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3570 ("running device %p\n", device)); 3571 3572 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3573 if (work_ccb == NULL) { 3574 kprintf("device on run queue with no ccbs???\n"); 3575 continue; 3576 } 3577 3578 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3579 3580 if (num_highpower <= 0) { 3581 /* 3582 * We got a high power command, but we 3583 * don't have any available slots. Freeze 3584 * the device queue until we have a slot 3585 * available. 3586 */ 3587 device->qfrozen_cnt++; 3588 STAILQ_INSERT_TAIL(&highpowerq, 3589 &work_ccb->ccb_h, 3590 xpt_links.stqe); 3591 3592 continue; 3593 } else { 3594 /* 3595 * Consume a high power slot while 3596 * this ccb runs. 3597 */ 3598 num_highpower--; 3599 } 3600 } 3601 devq->active_dev = device; 3602 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3603 3604 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3605 3606 devq->send_openings--; 3607 devq->send_active++; 3608 3609 if (device->ccbq.queue.entries > 0) 3610 xpt_schedule_dev_sendq(bus, device); 3611 3612 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3613 /* 3614 * The client wants to freeze the queue 3615 * after this CCB is sent. 3616 */ 3617 device->qfrozen_cnt++; 3618 } 3619 3620 /* In Target mode, the peripheral driver knows best... */ 3621 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3622 if ((device->inq_flags & SID_CmdQue) != 0 3623 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3624 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3625 else 3626 /* 3627 * Clear this in case of a retried CCB that 3628 * failed due to a rejected tag. 3629 */ 3630 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3631 } 3632 3633 /* 3634 * Device queues can be shared among multiple sim instances 3635 * that reside on different busses. Use the SIM in the queue 3636 * CCB's path, rather than the one in the bus that was passed 3637 * into this function. 3638 */ 3639 sim = work_ccb->ccb_h.path->bus->sim; 3640 (*(sim->sim_action))(sim, work_ccb); 3641 3642 devq->active_dev = NULL; 3643 /* Raise IPL for possible insertion and test at top of loop */ 3644 } 3645 devq->send_queue.qfrozen_cnt--; 3646 crit_exit(); 3647 } 3648 3649 /* 3650 * This function merges stuff from the slave ccb into the master ccb, while 3651 * keeping important fields in the master ccb constant. 3652 */ 3653 void 3654 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3655 { 3656 /* 3657 * Pull fields that are valid for peripheral drivers to set 3658 * into the master CCB along with the CCB "payload". 3659 */ 3660 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3661 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3662 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3663 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3664 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3665 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3666 } 3667 3668 void 3669 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3670 { 3671 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3672 callout_init(&ccb_h->timeout_ch); 3673 ccb_h->pinfo.priority = priority; 3674 ccb_h->path = path; 3675 ccb_h->path_id = path->bus->path_id; 3676 if (path->target) 3677 ccb_h->target_id = path->target->target_id; 3678 else 3679 ccb_h->target_id = CAM_TARGET_WILDCARD; 3680 if (path->device) { 3681 ccb_h->target_lun = path->device->lun_id; 3682 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3683 } else { 3684 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3685 } 3686 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3687 ccb_h->flags = 0; 3688 } 3689 3690 /* Path manipulation functions */ 3691 cam_status 3692 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3693 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3694 { 3695 struct cam_path *path; 3696 cam_status status; 3697 3698 path = kmalloc(sizeof(*path), M_DEVBUF, M_INTWAIT); 3699 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3700 if (status != CAM_REQ_CMP) { 3701 kfree(path, M_DEVBUF); 3702 path = NULL; 3703 } 3704 *new_path_ptr = path; 3705 return (status); 3706 } 3707 3708 static cam_status 3709 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3710 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3711 { 3712 struct cam_eb *bus; 3713 struct cam_et *target; 3714 struct cam_ed *device; 3715 cam_status status; 3716 3717 status = CAM_REQ_CMP; /* Completed without error */ 3718 target = NULL; /* Wildcarded */ 3719 device = NULL; /* Wildcarded */ 3720 3721 /* 3722 * We will potentially modify the EDT, so block interrupts 3723 * that may attempt to create cam paths. 3724 */ 3725 crit_enter(); 3726 bus = xpt_find_bus(path_id); 3727 if (bus == NULL) { 3728 status = CAM_PATH_INVALID; 3729 } else { 3730 target = xpt_find_target(bus, target_id); 3731 if (target == NULL) { 3732 /* Create one */ 3733 struct cam_et *new_target; 3734 3735 new_target = xpt_alloc_target(bus, target_id); 3736 if (new_target == NULL) { 3737 status = CAM_RESRC_UNAVAIL; 3738 } else { 3739 target = new_target; 3740 } 3741 } 3742 if (target != NULL) { 3743 device = xpt_find_device(target, lun_id); 3744 if (device == NULL) { 3745 /* Create one */ 3746 struct cam_ed *new_device; 3747 3748 new_device = xpt_alloc_device(bus, 3749 target, 3750 lun_id); 3751 if (new_device == NULL) { 3752 status = CAM_RESRC_UNAVAIL; 3753 } else { 3754 device = new_device; 3755 } 3756 } 3757 } 3758 } 3759 crit_exit(); 3760 3761 /* 3762 * Only touch the user's data if we are successful. 3763 */ 3764 if (status == CAM_REQ_CMP) { 3765 new_path->periph = perph; 3766 new_path->bus = bus; 3767 new_path->target = target; 3768 new_path->device = device; 3769 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3770 } else { 3771 if (device != NULL) 3772 xpt_release_device(bus, target, device); 3773 if (target != NULL) 3774 xpt_release_target(bus, target); 3775 if (bus != NULL) 3776 xpt_release_bus(bus); 3777 } 3778 return (status); 3779 } 3780 3781 static void 3782 xpt_release_path(struct cam_path *path) 3783 { 3784 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3785 if (path->device != NULL) { 3786 xpt_release_device(path->bus, path->target, path->device); 3787 path->device = NULL; 3788 } 3789 if (path->target != NULL) { 3790 xpt_release_target(path->bus, path->target); 3791 path->target = NULL; 3792 } 3793 if (path->bus != NULL) { 3794 xpt_release_bus(path->bus); 3795 path->bus = NULL; 3796 } 3797 } 3798 3799 void 3800 xpt_free_path(struct cam_path *path) 3801 { 3802 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3803 xpt_release_path(path); 3804 kfree(path, M_DEVBUF); 3805 } 3806 3807 3808 /* 3809 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3810 * in path1, 2 for match with wildcards in path2. 3811 */ 3812 int 3813 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3814 { 3815 int retval = 0; 3816 3817 if (path1->bus != path2->bus) { 3818 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3819 retval = 1; 3820 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3821 retval = 2; 3822 else 3823 return (-1); 3824 } 3825 if (path1->target != path2->target) { 3826 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3827 if (retval == 0) 3828 retval = 1; 3829 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3830 retval = 2; 3831 else 3832 return (-1); 3833 } 3834 if (path1->device != path2->device) { 3835 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3836 if (retval == 0) 3837 retval = 1; 3838 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3839 retval = 2; 3840 else 3841 return (-1); 3842 } 3843 return (retval); 3844 } 3845 3846 void 3847 xpt_print_path(struct cam_path *path) 3848 { 3849 if (path == NULL) 3850 kprintf("(nopath): "); 3851 else { 3852 if (path->periph != NULL) 3853 kprintf("(%s%d:", path->periph->periph_name, 3854 path->periph->unit_number); 3855 else 3856 kprintf("(noperiph:"); 3857 3858 if (path->bus != NULL) 3859 kprintf("%s%d:%d:", path->bus->sim->sim_name, 3860 path->bus->sim->unit_number, 3861 path->bus->sim->bus_id); 3862 else 3863 kprintf("nobus:"); 3864 3865 if (path->target != NULL) 3866 kprintf("%d:", path->target->target_id); 3867 else 3868 kprintf("X:"); 3869 3870 if (path->device != NULL) 3871 kprintf("%d): ", path->device->lun_id); 3872 else 3873 kprintf("X): "); 3874 } 3875 } 3876 3877 path_id_t 3878 xpt_path_path_id(struct cam_path *path) 3879 { 3880 return(path->bus->path_id); 3881 } 3882 3883 target_id_t 3884 xpt_path_target_id(struct cam_path *path) 3885 { 3886 if (path->target != NULL) 3887 return (path->target->target_id); 3888 else 3889 return (CAM_TARGET_WILDCARD); 3890 } 3891 3892 lun_id_t 3893 xpt_path_lun_id(struct cam_path *path) 3894 { 3895 if (path->device != NULL) 3896 return (path->device->lun_id); 3897 else 3898 return (CAM_LUN_WILDCARD); 3899 } 3900 3901 struct cam_sim * 3902 xpt_path_sim(struct cam_path *path) 3903 { 3904 return (path->bus->sim); 3905 } 3906 3907 struct cam_periph* 3908 xpt_path_periph(struct cam_path *path) 3909 { 3910 return (path->periph); 3911 } 3912 3913 /* 3914 * Release a CAM control block for the caller. Remit the cost of the structure 3915 * to the device referenced by the path. If the this device had no 'credits' 3916 * and peripheral drivers have registered async callbacks for this notification 3917 * call them now. 3918 */ 3919 void 3920 xpt_release_ccb(union ccb *free_ccb) 3921 { 3922 struct cam_path *path; 3923 struct cam_ed *device; 3924 struct cam_eb *bus; 3925 3926 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3927 path = free_ccb->ccb_h.path; 3928 device = path->device; 3929 bus = path->bus; 3930 crit_enter(); 3931 cam_ccbq_release_opening(&device->ccbq); 3932 if (xpt_ccb_count > xpt_max_ccbs) { 3933 xpt_free_ccb(free_ccb); 3934 xpt_ccb_count--; 3935 } else { 3936 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 3937 } 3938 if (bus->sim->devq) { 3939 bus->sim->devq->alloc_openings++; 3940 bus->sim->devq->alloc_active--; 3941 } 3942 /* XXX Turn this into an inline function - xpt_run_device?? */ 3943 if ((device_is_alloc_queued(device) == 0) 3944 && (device->drvq.entries > 0)) { 3945 xpt_schedule_dev_allocq(bus, device); 3946 } 3947 crit_exit(); 3948 if (bus->sim->devq && dev_allocq_is_runnable(bus->sim->devq)) 3949 xpt_run_dev_allocq(bus); 3950 } 3951 3952 /* Functions accessed by SIM drivers */ 3953 3954 /* 3955 * A sim structure, listing the SIM entry points and instance 3956 * identification info is passed to xpt_bus_register to hook the SIM 3957 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3958 * for this new bus and places it in the array of busses and assigns 3959 * it a path_id. The path_id may be influenced by "hard wiring" 3960 * information specified by the user. Once interrupt services are 3961 * availible, the bus will be probed. 3962 */ 3963 int32_t 3964 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 3965 { 3966 struct cam_eb *new_bus; 3967 struct cam_eb *old_bus; 3968 struct ccb_pathinq cpi; 3969 3970 sim->bus_id = bus; 3971 new_bus = kmalloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT); 3972 3973 if (strcmp(sim->sim_name, "xpt") != 0) { 3974 sim->path_id = 3975 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3976 } 3977 3978 TAILQ_INIT(&new_bus->et_entries); 3979 new_bus->path_id = sim->path_id; 3980 new_bus->sim = sim; 3981 ++sim->refcount; 3982 timevalclear(&new_bus->last_reset); 3983 new_bus->flags = 0; 3984 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3985 new_bus->generation = 0; 3986 crit_enter(); 3987 old_bus = TAILQ_FIRST(&xpt_busses); 3988 while (old_bus != NULL 3989 && old_bus->path_id < new_bus->path_id) 3990 old_bus = TAILQ_NEXT(old_bus, links); 3991 if (old_bus != NULL) 3992 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3993 else 3994 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 3995 bus_generation++; 3996 crit_exit(); 3997 3998 /* Notify interested parties */ 3999 if (sim->path_id != CAM_XPT_PATH_ID) { 4000 struct cam_path path; 4001 4002 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4003 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4004 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4005 cpi.ccb_h.func_code = XPT_PATH_INQ; 4006 xpt_action((union ccb *)&cpi); 4007 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi); 4008 xpt_release_path(&path); 4009 } 4010 return (CAM_SUCCESS); 4011 } 4012 4013 /* 4014 * Deregister a bus. We must clean out all transactions pending on the bus. 4015 * This routine is typically called prior to cam_sim_free() (e.g. see 4016 * dev/usbmisc/umass/umass.c) 4017 */ 4018 int32_t 4019 xpt_bus_deregister(path_id_t pathid) 4020 { 4021 struct cam_path bus_path; 4022 cam_status status; 4023 4024 status = xpt_compile_path(&bus_path, NULL, pathid, 4025 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4026 if (status != CAM_REQ_CMP) 4027 return (status); 4028 4029 /* 4030 * This should clear out all pending requests and timeouts, but 4031 * the ccb's may be queued to a software interrupt. 4032 * 4033 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4034 * and it really ought to. 4035 */ 4036 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4037 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4038 4039 /* make sure all responses have been processed */ 4040 camisr(&cam_netq); 4041 camisr(&cam_bioq); 4042 4043 /* Release the reference count held while registered. */ 4044 xpt_release_bus(bus_path.bus); 4045 xpt_release_path(&bus_path); 4046 4047 return (CAM_REQ_CMP); 4048 } 4049 4050 static path_id_t 4051 xptnextfreepathid(void) 4052 { 4053 struct cam_eb *bus; 4054 path_id_t pathid; 4055 char *strval; 4056 4057 pathid = 0; 4058 bus = TAILQ_FIRST(&xpt_busses); 4059 retry: 4060 /* Find an unoccupied pathid */ 4061 while (bus != NULL 4062 && bus->path_id <= pathid) { 4063 if (bus->path_id == pathid) 4064 pathid++; 4065 bus = TAILQ_NEXT(bus, links); 4066 } 4067 4068 /* 4069 * Ensure that this pathid is not reserved for 4070 * a bus that may be registered in the future. 4071 */ 4072 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4073 ++pathid; 4074 /* Start the search over */ 4075 goto retry; 4076 } 4077 return (pathid); 4078 } 4079 4080 static path_id_t 4081 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4082 { 4083 path_id_t pathid; 4084 int i, dunit, val; 4085 char buf[32], *strval; 4086 4087 pathid = CAM_XPT_PATH_ID; 4088 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4089 i = -1; 4090 while ((i = resource_locate(i, "scbus")) != -1) { 4091 dunit = resource_query_unit(i); 4092 if (dunit < 0) /* unwired?! */ 4093 continue; 4094 if (resource_string_value("scbus", dunit, "at", &strval) != 0) 4095 continue; 4096 if (strcmp(buf, strval) != 0) 4097 continue; 4098 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4099 if (sim_bus == val) { 4100 pathid = dunit; 4101 break; 4102 } 4103 } else if (sim_bus == 0) { 4104 /* Unspecified matches bus 0 */ 4105 pathid = dunit; 4106 break; 4107 } else { 4108 kprintf("Ambiguous scbus configuration for %s%d " 4109 "bus %d, cannot wire down. The kernel " 4110 "config entry for scbus%d should " 4111 "specify a controller bus.\n" 4112 "Scbus will be assigned dynamically.\n", 4113 sim_name, sim_unit, sim_bus, dunit); 4114 break; 4115 } 4116 } 4117 4118 if (pathid == CAM_XPT_PATH_ID) 4119 pathid = xptnextfreepathid(); 4120 return (pathid); 4121 } 4122 4123 void 4124 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4125 { 4126 struct cam_eb *bus; 4127 struct cam_et *target, *next_target; 4128 struct cam_ed *device, *next_device; 4129 4130 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4131 4132 /* 4133 * Most async events come from a CAM interrupt context. In 4134 * a few cases, the error recovery code at the peripheral layer, 4135 * which may run from our SWI or a process context, may signal 4136 * deferred events with a call to xpt_async. Ensure async 4137 * notifications are serialized by blocking cam interrupts. 4138 */ 4139 crit_enter(); 4140 4141 bus = path->bus; 4142 4143 if (async_code == AC_BUS_RESET) { 4144 /* Update our notion of when the last reset occurred */ 4145 microuptime(&bus->last_reset); 4146 } 4147 4148 for (target = TAILQ_FIRST(&bus->et_entries); 4149 target != NULL; 4150 target = next_target) { 4151 4152 next_target = TAILQ_NEXT(target, links); 4153 4154 if (path->target != target 4155 && path->target->target_id != CAM_TARGET_WILDCARD 4156 && target->target_id != CAM_TARGET_WILDCARD) 4157 continue; 4158 4159 if (async_code == AC_SENT_BDR) { 4160 /* Update our notion of when the last reset occurred */ 4161 microuptime(&path->target->last_reset); 4162 } 4163 4164 for (device = TAILQ_FIRST(&target->ed_entries); 4165 device != NULL; 4166 device = next_device) { 4167 4168 next_device = TAILQ_NEXT(device, links); 4169 4170 if (path->device != device 4171 && path->device->lun_id != CAM_LUN_WILDCARD 4172 && device->lun_id != CAM_LUN_WILDCARD) 4173 continue; 4174 4175 xpt_dev_async(async_code, bus, target, 4176 device, async_arg); 4177 4178 xpt_async_bcast(&device->asyncs, async_code, 4179 path, async_arg); 4180 } 4181 } 4182 4183 /* 4184 * If this wasn't a fully wildcarded async, tell all 4185 * clients that want all async events. 4186 */ 4187 if (bus != xpt_periph->path->bus) 4188 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4189 path, async_arg); 4190 crit_exit(); 4191 } 4192 4193 static void 4194 xpt_async_bcast(struct async_list *async_head, 4195 u_int32_t async_code, 4196 struct cam_path *path, void *async_arg) 4197 { 4198 struct async_node *cur_entry; 4199 4200 cur_entry = SLIST_FIRST(async_head); 4201 while (cur_entry != NULL) { 4202 struct async_node *next_entry; 4203 /* 4204 * Grab the next list entry before we call the current 4205 * entry's callback. This is because the callback function 4206 * can delete its async callback entry. 4207 */ 4208 next_entry = SLIST_NEXT(cur_entry, links); 4209 if ((cur_entry->event_enable & async_code) != 0) 4210 cur_entry->callback(cur_entry->callback_arg, 4211 async_code, path, 4212 async_arg); 4213 cur_entry = next_entry; 4214 } 4215 } 4216 4217 /* 4218 * Handle any per-device event notifications that require action by the XPT. 4219 */ 4220 static void 4221 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4222 struct cam_ed *device, void *async_arg) 4223 { 4224 cam_status status; 4225 struct cam_path newpath; 4226 4227 /* 4228 * We only need to handle events for real devices. 4229 */ 4230 if (target->target_id == CAM_TARGET_WILDCARD 4231 || device->lun_id == CAM_LUN_WILDCARD) 4232 return; 4233 4234 /* 4235 * We need our own path with wildcards expanded to 4236 * handle certain types of events. 4237 */ 4238 if ((async_code == AC_SENT_BDR) 4239 || (async_code == AC_BUS_RESET) 4240 || (async_code == AC_INQ_CHANGED)) 4241 status = xpt_compile_path(&newpath, NULL, 4242 bus->path_id, 4243 target->target_id, 4244 device->lun_id); 4245 else 4246 status = CAM_REQ_CMP_ERR; 4247 4248 if (status == CAM_REQ_CMP) { 4249 4250 /* 4251 * Allow transfer negotiation to occur in a 4252 * tag free environment. 4253 */ 4254 if (async_code == AC_SENT_BDR 4255 || async_code == AC_BUS_RESET) 4256 xpt_toggle_tags(&newpath); 4257 4258 if (async_code == AC_INQ_CHANGED) { 4259 /* 4260 * We've sent a start unit command, or 4261 * something similar to a device that 4262 * may have caused its inquiry data to 4263 * change. So we re-scan the device to 4264 * refresh the inquiry data for it. 4265 */ 4266 xpt_scan_lun(newpath.periph, &newpath, 4267 CAM_EXPECT_INQ_CHANGE, NULL); 4268 } 4269 xpt_release_path(&newpath); 4270 } else if (async_code == AC_LOST_DEVICE) { 4271 /* 4272 * When we lose a device the device may be about to detach 4273 * the sim, we have to clear out all pending timeouts and 4274 * requests before that happens. XXX it would be nice if 4275 * we could abort the requests pertaining to the device. 4276 */ 4277 xpt_release_devq_timeout(device); 4278 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4279 device->flags |= CAM_DEV_UNCONFIGURED; 4280 xpt_release_device(bus, target, device); 4281 } 4282 } else if (async_code == AC_TRANSFER_NEG) { 4283 struct ccb_trans_settings *settings; 4284 4285 settings = (struct ccb_trans_settings *)async_arg; 4286 xpt_set_transfer_settings(settings, device, 4287 /*async_update*/TRUE); 4288 } 4289 } 4290 4291 u_int32_t 4292 xpt_freeze_devq(struct cam_path *path, u_int count) 4293 { 4294 struct ccb_hdr *ccbh; 4295 4296 crit_enter(); 4297 path->device->qfrozen_cnt += count; 4298 4299 /* 4300 * Mark the last CCB in the queue as needing 4301 * to be requeued if the driver hasn't 4302 * changed it's state yet. This fixes a race 4303 * where a ccb is just about to be queued to 4304 * a controller driver when it's interrupt routine 4305 * freezes the queue. To completly close the 4306 * hole, controller drives must check to see 4307 * if a ccb's status is still CAM_REQ_INPROG 4308 * under critical section protection just before they queue 4309 * the CCB. See ahc_action/ahc_freeze_devq for 4310 * an example. 4311 */ 4312 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4313 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4314 ccbh->status = CAM_REQUEUE_REQ; 4315 crit_exit(); 4316 return (path->device->qfrozen_cnt); 4317 } 4318 4319 u_int32_t 4320 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4321 { 4322 if (sim->devq == NULL) 4323 return(count); 4324 sim->devq->send_queue.qfrozen_cnt += count; 4325 if (sim->devq->active_dev != NULL) { 4326 struct ccb_hdr *ccbh; 4327 4328 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4329 ccb_hdr_tailq); 4330 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4331 ccbh->status = CAM_REQUEUE_REQ; 4332 } 4333 return (sim->devq->send_queue.qfrozen_cnt); 4334 } 4335 4336 /* 4337 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4338 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4339 * freed, which is not the case here), but the device queue is also freed XXX 4340 * and we have to check that here. 4341 * 4342 * XXX fixme: could we simply not null-out the device queue via 4343 * cam_sim_free()? 4344 */ 4345 static void 4346 xpt_release_devq_timeout(void *arg) 4347 { 4348 struct cam_ed *device; 4349 4350 device = (struct cam_ed *)arg; 4351 4352 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4353 } 4354 4355 void 4356 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4357 { 4358 xpt_release_devq_device(path->device, count, run_queue); 4359 } 4360 4361 static void 4362 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4363 { 4364 int rundevq; 4365 4366 rundevq = 0; 4367 crit_enter(); 4368 4369 if (dev->qfrozen_cnt > 0) { 4370 4371 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4372 dev->qfrozen_cnt -= count; 4373 if (dev->qfrozen_cnt == 0) { 4374 4375 /* 4376 * No longer need to wait for a successful 4377 * command completion. 4378 */ 4379 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4380 4381 /* 4382 * Remove any timeouts that might be scheduled 4383 * to release this queue. 4384 */ 4385 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4386 callout_stop(&dev->c_handle); 4387 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4388 } 4389 4390 /* 4391 * Now that we are unfrozen schedule the 4392 * device so any pending transactions are 4393 * run. 4394 */ 4395 if ((dev->ccbq.queue.entries > 0) 4396 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4397 && (run_queue != 0)) { 4398 rundevq = 1; 4399 } 4400 } 4401 } 4402 if (rundevq != 0) 4403 xpt_run_dev_sendq(dev->target->bus); 4404 crit_exit(); 4405 } 4406 4407 void 4408 xpt_release_simq(struct cam_sim *sim, int run_queue) 4409 { 4410 struct camq *sendq; 4411 4412 if (sim->devq == NULL) 4413 return; 4414 4415 sendq = &(sim->devq->send_queue); 4416 crit_enter(); 4417 4418 if (sendq->qfrozen_cnt > 0) { 4419 sendq->qfrozen_cnt--; 4420 if (sendq->qfrozen_cnt == 0) { 4421 struct cam_eb *bus; 4422 4423 /* 4424 * If there is a timeout scheduled to release this 4425 * sim queue, remove it. The queue frozen count is 4426 * already at 0. 4427 */ 4428 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4429 callout_stop(&sim->c_handle); 4430 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4431 } 4432 bus = xpt_find_bus(sim->path_id); 4433 crit_exit(); 4434 4435 if (run_queue) { 4436 /* 4437 * Now that we are unfrozen run the send queue. 4438 */ 4439 xpt_run_dev_sendq(bus); 4440 } 4441 xpt_release_bus(bus); 4442 } else { 4443 crit_exit(); 4444 } 4445 } else { 4446 crit_exit(); 4447 } 4448 } 4449 4450 void 4451 xpt_done(union ccb *done_ccb) 4452 { 4453 crit_enter(); 4454 4455 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4456 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4457 /* 4458 * Queue up the request for handling by our SWI handler 4459 * any of the "non-immediate" type of ccbs. 4460 */ 4461 switch (done_ccb->ccb_h.path->periph->type) { 4462 case CAM_PERIPH_BIO: 4463 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4464 sim_links.tqe); 4465 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4466 setsoftcambio(); 4467 break; 4468 case CAM_PERIPH_NET: 4469 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4470 sim_links.tqe); 4471 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4472 setsoftcamnet(); 4473 break; 4474 } 4475 } 4476 crit_exit(); 4477 } 4478 4479 union ccb * 4480 xpt_alloc_ccb(void) 4481 { 4482 union ccb *new_ccb; 4483 4484 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4485 return (new_ccb); 4486 } 4487 4488 void 4489 xpt_free_ccb(union ccb *free_ccb) 4490 { 4491 kfree(free_ccb, M_DEVBUF); 4492 } 4493 4494 4495 4496 /* Private XPT functions */ 4497 4498 /* 4499 * Get a CAM control block for the caller. Charge the structure to the device 4500 * referenced by the path. If the this device has no 'credits' then the 4501 * device already has the maximum number of outstanding operations under way 4502 * and we return NULL. If we don't have sufficient resources to allocate more 4503 * ccbs, we also return NULL. 4504 */ 4505 static union ccb * 4506 xpt_get_ccb(struct cam_ed *device) 4507 { 4508 union ccb *new_ccb; 4509 4510 crit_enter(); 4511 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) { 4512 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4513 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4514 xpt_links.sle); 4515 xpt_ccb_count++; 4516 } 4517 cam_ccbq_take_opening(&device->ccbq); 4518 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4519 crit_exit(); 4520 return (new_ccb); 4521 } 4522 4523 static void 4524 xpt_release_bus(struct cam_eb *bus) 4525 { 4526 4527 crit_enter(); 4528 if (bus->refcount == 1) { 4529 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL); 4530 TAILQ_REMOVE(&xpt_busses, bus, links); 4531 if (bus->sim) { 4532 cam_sim_release(bus->sim, 0); 4533 bus->sim = NULL; 4534 } 4535 bus_generation++; 4536 KKASSERT(bus->refcount == 1); 4537 kfree(bus, M_DEVBUF); 4538 } else { 4539 --bus->refcount; 4540 } 4541 crit_exit(); 4542 } 4543 4544 static struct cam_et * 4545 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4546 { 4547 struct cam_et *target; 4548 struct cam_et *cur_target; 4549 4550 target = kmalloc(sizeof(*target), M_DEVBUF, M_INTWAIT); 4551 4552 TAILQ_INIT(&target->ed_entries); 4553 target->bus = bus; 4554 target->target_id = target_id; 4555 target->refcount = 1; 4556 target->generation = 0; 4557 timevalclear(&target->last_reset); 4558 /* 4559 * Hold a reference to our parent bus so it 4560 * will not go away before we do. 4561 */ 4562 bus->refcount++; 4563 4564 /* Insertion sort into our bus's target list */ 4565 cur_target = TAILQ_FIRST(&bus->et_entries); 4566 while (cur_target != NULL && cur_target->target_id < target_id) 4567 cur_target = TAILQ_NEXT(cur_target, links); 4568 4569 if (cur_target != NULL) { 4570 TAILQ_INSERT_BEFORE(cur_target, target, links); 4571 } else { 4572 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4573 } 4574 bus->generation++; 4575 return (target); 4576 } 4577 4578 static void 4579 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4580 { 4581 crit_enter(); 4582 if (target->refcount == 1) { 4583 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 4584 TAILQ_REMOVE(&bus->et_entries, target, links); 4585 bus->generation++; 4586 xpt_release_bus(bus); 4587 KKASSERT(target->refcount == 1); 4588 kfree(target, M_DEVBUF); 4589 } else { 4590 --target->refcount; 4591 } 4592 crit_exit(); 4593 } 4594 4595 static struct cam_ed * 4596 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4597 { 4598 struct cam_ed *device; 4599 struct cam_devq *devq; 4600 cam_status status; 4601 4602 /* Make space for us in the device queue on our bus */ 4603 if (bus->sim->devq == NULL) 4604 return(NULL); 4605 devq = bus->sim->devq; 4606 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4607 4608 if (status != CAM_REQ_CMP) { 4609 device = NULL; 4610 } else { 4611 device = kmalloc(sizeof(*device), M_DEVBUF, M_INTWAIT); 4612 } 4613 4614 if (device != NULL) { 4615 struct cam_ed *cur_device; 4616 4617 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4618 device->alloc_ccb_entry.device = device; 4619 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4620 device->send_ccb_entry.device = device; 4621 device->target = target; 4622 device->lun_id = lun_id; 4623 /* Initialize our queues */ 4624 if (camq_init(&device->drvq, 0) != 0) { 4625 kfree(device, M_DEVBUF); 4626 return (NULL); 4627 } 4628 if (cam_ccbq_init(&device->ccbq, 4629 bus->sim->max_dev_openings) != 0) { 4630 camq_fini(&device->drvq); 4631 kfree(device, M_DEVBUF); 4632 return (NULL); 4633 } 4634 SLIST_INIT(&device->asyncs); 4635 SLIST_INIT(&device->periphs); 4636 device->generation = 0; 4637 device->owner = NULL; 4638 /* 4639 * Take the default quirk entry until we have inquiry 4640 * data and can determine a better quirk to use. 4641 */ 4642 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4643 bzero(&device->inq_data, sizeof(device->inq_data)); 4644 device->inq_flags = 0; 4645 device->queue_flags = 0; 4646 device->serial_num = NULL; 4647 device->serial_num_len = 0; 4648 device->qfrozen_cnt = 0; 4649 device->flags = CAM_DEV_UNCONFIGURED; 4650 device->tag_delay_count = 0; 4651 device->refcount = 1; 4652 callout_init(&device->c_handle); 4653 4654 /* 4655 * Hold a reference to our parent target so it 4656 * will not go away before we do. 4657 */ 4658 target->refcount++; 4659 4660 /* 4661 * XXX should be limited by number of CCBs this bus can 4662 * do. 4663 */ 4664 xpt_max_ccbs += device->ccbq.devq_openings; 4665 /* Insertion sort into our target's device list */ 4666 cur_device = TAILQ_FIRST(&target->ed_entries); 4667 while (cur_device != NULL && cur_device->lun_id < lun_id) 4668 cur_device = TAILQ_NEXT(cur_device, links); 4669 if (cur_device != NULL) { 4670 TAILQ_INSERT_BEFORE(cur_device, device, links); 4671 } else { 4672 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4673 } 4674 target->generation++; 4675 } 4676 return (device); 4677 } 4678 4679 static void 4680 xpt_reference_device(struct cam_ed *device) 4681 { 4682 ++device->refcount; 4683 } 4684 4685 static void 4686 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4687 struct cam_ed *device) 4688 { 4689 struct cam_devq *devq; 4690 4691 crit_enter(); 4692 if (device->refcount == 1) { 4693 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 4694 4695 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4696 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4697 panic("Removing device while still queued for ccbs"); 4698 4699 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4700 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4701 callout_stop(&device->c_handle); 4702 } 4703 4704 TAILQ_REMOVE(&target->ed_entries, device,links); 4705 target->generation++; 4706 xpt_max_ccbs -= device->ccbq.devq_openings; 4707 /* Release our slot in the devq */ 4708 devq = bus->sim->devq; 4709 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4710 xpt_release_target(bus, target); 4711 KKASSERT(device->refcount == 1); 4712 kfree(device, M_DEVBUF); 4713 } else { 4714 --device->refcount; 4715 } 4716 crit_exit(); 4717 } 4718 4719 static u_int32_t 4720 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4721 { 4722 int diff; 4723 int result; 4724 struct cam_ed *dev; 4725 4726 dev = path->device; 4727 4728 crit_enter(); 4729 4730 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4731 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4732 if (result == CAM_REQ_CMP && (diff < 0)) { 4733 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4734 } 4735 /* Adjust the global limit */ 4736 xpt_max_ccbs += diff; 4737 crit_exit(); 4738 return (result); 4739 } 4740 4741 static struct cam_eb * 4742 xpt_find_bus(path_id_t path_id) 4743 { 4744 struct cam_eb *bus; 4745 4746 for (bus = TAILQ_FIRST(&xpt_busses); 4747 bus != NULL; 4748 bus = TAILQ_NEXT(bus, links)) { 4749 if (bus->path_id == path_id) { 4750 bus->refcount++; 4751 break; 4752 } 4753 } 4754 return (bus); 4755 } 4756 4757 static struct cam_et * 4758 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4759 { 4760 struct cam_et *target; 4761 4762 for (target = TAILQ_FIRST(&bus->et_entries); 4763 target != NULL; 4764 target = TAILQ_NEXT(target, links)) { 4765 if (target->target_id == target_id) { 4766 target->refcount++; 4767 break; 4768 } 4769 } 4770 return (target); 4771 } 4772 4773 static struct cam_ed * 4774 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4775 { 4776 struct cam_ed *device; 4777 4778 for (device = TAILQ_FIRST(&target->ed_entries); 4779 device != NULL; 4780 device = TAILQ_NEXT(device, links)) { 4781 if (device->lun_id == lun_id) { 4782 device->refcount++; 4783 break; 4784 } 4785 } 4786 return (device); 4787 } 4788 4789 typedef struct { 4790 union ccb *request_ccb; 4791 struct ccb_pathinq *cpi; 4792 int pending_count; 4793 } xpt_scan_bus_info; 4794 4795 /* 4796 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4797 * As the scan progresses, xpt_scan_bus is used as the 4798 * callback on completion function. 4799 */ 4800 static void 4801 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 4802 { 4803 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4804 ("xpt_scan_bus\n")); 4805 switch (request_ccb->ccb_h.func_code) { 4806 case XPT_SCAN_BUS: 4807 { 4808 xpt_scan_bus_info *scan_info; 4809 union ccb *work_ccb; 4810 struct cam_path *path; 4811 u_int i; 4812 u_int max_target; 4813 u_int initiator_id; 4814 4815 /* Find out the characteristics of the bus */ 4816 work_ccb = xpt_alloc_ccb(); 4817 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 4818 request_ccb->ccb_h.pinfo.priority); 4819 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4820 xpt_action(work_ccb); 4821 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4822 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 4823 xpt_free_ccb(work_ccb); 4824 xpt_done(request_ccb); 4825 return; 4826 } 4827 4828 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4829 /* 4830 * Can't scan the bus on an adapter that 4831 * cannot perform the initiator role. 4832 */ 4833 request_ccb->ccb_h.status = CAM_REQ_CMP; 4834 xpt_free_ccb(work_ccb); 4835 xpt_done(request_ccb); 4836 return; 4837 } 4838 4839 /* Save some state for use while we probe for devices */ 4840 scan_info = (xpt_scan_bus_info *) 4841 kmalloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT); 4842 scan_info->request_ccb = request_ccb; 4843 scan_info->cpi = &work_ccb->cpi; 4844 4845 /* Cache on our stack so we can work asynchronously */ 4846 max_target = scan_info->cpi->max_target; 4847 initiator_id = scan_info->cpi->initiator_id; 4848 4849 /* 4850 * Don't count the initiator if the 4851 * initiator is addressable. 4852 */ 4853 scan_info->pending_count = max_target + 1; 4854 if (initiator_id <= max_target) 4855 scan_info->pending_count--; 4856 4857 for (i = 0; i <= max_target; i++) { 4858 cam_status status; 4859 if (i == initiator_id) 4860 continue; 4861 4862 status = xpt_create_path(&path, xpt_periph, 4863 request_ccb->ccb_h.path_id, 4864 i, 0); 4865 if (status != CAM_REQ_CMP) { 4866 kprintf("xpt_scan_bus: xpt_create_path failed" 4867 " with status %#x, bus scan halted\n", 4868 status); 4869 break; 4870 } 4871 work_ccb = xpt_alloc_ccb(); 4872 xpt_setup_ccb(&work_ccb->ccb_h, path, 4873 request_ccb->ccb_h.pinfo.priority); 4874 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4875 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4876 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 4877 work_ccb->crcn.flags = request_ccb->crcn.flags; 4878 #if 0 4879 kprintf("xpt_scan_bus: probing %d:%d:%d\n", 4880 request_ccb->ccb_h.path_id, i, 0); 4881 #endif 4882 xpt_action(work_ccb); 4883 } 4884 break; 4885 } 4886 case XPT_SCAN_LUN: 4887 { 4888 xpt_scan_bus_info *scan_info; 4889 path_id_t path_id; 4890 target_id_t target_id; 4891 lun_id_t lun_id; 4892 4893 /* Reuse the same CCB to query if a device was really found */ 4894 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 4895 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 4896 request_ccb->ccb_h.pinfo.priority); 4897 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 4898 4899 path_id = request_ccb->ccb_h.path_id; 4900 target_id = request_ccb->ccb_h.target_id; 4901 lun_id = request_ccb->ccb_h.target_lun; 4902 xpt_action(request_ccb); 4903 4904 #if 0 4905 kprintf("xpt_scan_bus: got back probe from %d:%d:%d\n", 4906 path_id, target_id, lun_id); 4907 #endif 4908 4909 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 4910 struct cam_ed *device; 4911 struct cam_et *target; 4912 int phl; 4913 4914 /* 4915 * If we already probed lun 0 successfully, or 4916 * we have additional configured luns on this 4917 * target that might have "gone away", go onto 4918 * the next lun. 4919 */ 4920 target = request_ccb->ccb_h.path->target; 4921 /* 4922 * We may touch devices that we don't 4923 * hold references too, so ensure they 4924 * don't disappear out from under us. 4925 * The target above is referenced by the 4926 * path in the request ccb. 4927 */ 4928 phl = 0; 4929 crit_enter(); 4930 device = TAILQ_FIRST(&target->ed_entries); 4931 if (device != NULL) { 4932 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 4933 if (device->lun_id == 0) 4934 device = TAILQ_NEXT(device, links); 4935 } 4936 crit_exit(); 4937 if ((lun_id != 0) || (device != NULL)) { 4938 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 4939 lun_id++; 4940 } 4941 } else { 4942 struct cam_ed *device; 4943 4944 device = request_ccb->ccb_h.path->device; 4945 4946 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 4947 /* Try the next lun */ 4948 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 4949 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 4950 lun_id++; 4951 } 4952 } 4953 4954 xpt_free_path(request_ccb->ccb_h.path); 4955 4956 /* Check Bounds */ 4957 if ((lun_id == request_ccb->ccb_h.target_lun) 4958 || lun_id > scan_info->cpi->max_lun) { 4959 /* We're done */ 4960 4961 xpt_free_ccb(request_ccb); 4962 scan_info->pending_count--; 4963 if (scan_info->pending_count == 0) { 4964 xpt_free_ccb((union ccb *)scan_info->cpi); 4965 request_ccb = scan_info->request_ccb; 4966 kfree(scan_info, M_TEMP); 4967 request_ccb->ccb_h.status = CAM_REQ_CMP; 4968 xpt_done(request_ccb); 4969 } 4970 } else { 4971 /* Try the next device */ 4972 struct cam_path *path; 4973 cam_status status; 4974 4975 path = request_ccb->ccb_h.path; 4976 status = xpt_create_path(&path, xpt_periph, 4977 path_id, target_id, lun_id); 4978 if (status != CAM_REQ_CMP) { 4979 kprintf("xpt_scan_bus: xpt_create_path failed " 4980 "with status %#x, halting LUN scan\n", 4981 status); 4982 xpt_free_ccb(request_ccb); 4983 scan_info->pending_count--; 4984 if (scan_info->pending_count == 0) { 4985 xpt_free_ccb( 4986 (union ccb *)scan_info->cpi); 4987 request_ccb = scan_info->request_ccb; 4988 kfree(scan_info, M_TEMP); 4989 request_ccb->ccb_h.status = CAM_REQ_CMP; 4990 xpt_done(request_ccb); 4991 break; 4992 } 4993 } 4994 xpt_setup_ccb(&request_ccb->ccb_h, path, 4995 request_ccb->ccb_h.pinfo.priority); 4996 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4997 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4998 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 4999 request_ccb->crcn.flags = 5000 scan_info->request_ccb->crcn.flags; 5001 #if 0 5002 xpt_print_path(path); 5003 kprintf("xpt_scan bus probing\n"); 5004 #endif 5005 xpt_action(request_ccb); 5006 } 5007 break; 5008 } 5009 default: 5010 break; 5011 } 5012 } 5013 5014 typedef enum { 5015 PROBE_TUR, 5016 PROBE_INQUIRY, 5017 PROBE_FULL_INQUIRY, 5018 PROBE_MODE_SENSE, 5019 PROBE_SERIAL_NUM, 5020 PROBE_TUR_FOR_NEGOTIATION 5021 } probe_action; 5022 5023 typedef enum { 5024 PROBE_INQUIRY_CKSUM = 0x01, 5025 PROBE_SERIAL_CKSUM = 0x02, 5026 PROBE_NO_ANNOUNCE = 0x04 5027 } probe_flags; 5028 5029 typedef struct { 5030 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5031 probe_action action; 5032 union ccb saved_ccb; 5033 probe_flags flags; 5034 MD5_CTX context; 5035 u_int8_t digest[16]; 5036 } probe_softc; 5037 5038 static void 5039 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5040 cam_flags flags, union ccb *request_ccb) 5041 { 5042 struct ccb_pathinq cpi; 5043 cam_status status; 5044 struct cam_path *new_path; 5045 struct cam_periph *old_periph; 5046 5047 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5048 ("xpt_scan_lun\n")); 5049 5050 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5051 cpi.ccb_h.func_code = XPT_PATH_INQ; 5052 xpt_action((union ccb *)&cpi); 5053 5054 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5055 if (request_ccb != NULL) { 5056 request_ccb->ccb_h.status = cpi.ccb_h.status; 5057 xpt_done(request_ccb); 5058 } 5059 return; 5060 } 5061 5062 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5063 /* 5064 * Can't scan the bus on an adapter that 5065 * cannot perform the initiator role. 5066 */ 5067 if (request_ccb != NULL) { 5068 request_ccb->ccb_h.status = CAM_REQ_CMP; 5069 xpt_done(request_ccb); 5070 } 5071 return; 5072 } 5073 5074 if (request_ccb == NULL) { 5075 request_ccb = kmalloc(sizeof(union ccb), M_TEMP, M_INTWAIT); 5076 new_path = kmalloc(sizeof(*new_path), M_TEMP, M_INTWAIT); 5077 status = xpt_compile_path(new_path, xpt_periph, 5078 path->bus->path_id, 5079 path->target->target_id, 5080 path->device->lun_id); 5081 5082 if (status != CAM_REQ_CMP) { 5083 xpt_print_path(path); 5084 kprintf("xpt_scan_lun: can't compile path, can't " 5085 "continue\n"); 5086 kfree(request_ccb, M_TEMP); 5087 kfree(new_path, M_TEMP); 5088 return; 5089 } 5090 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5091 request_ccb->ccb_h.cbfcnp = xptscandone; 5092 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5093 request_ccb->crcn.flags = flags; 5094 } 5095 5096 crit_enter(); 5097 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5098 probe_softc *softc; 5099 5100 softc = (probe_softc *)old_periph->softc; 5101 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5102 periph_links.tqe); 5103 } else { 5104 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5105 probestart, "probe", 5106 CAM_PERIPH_BIO, 5107 request_ccb->ccb_h.path, NULL, 0, 5108 request_ccb); 5109 5110 if (status != CAM_REQ_CMP) { 5111 xpt_print_path(path); 5112 kprintf("xpt_scan_lun: cam_alloc_periph returned an " 5113 "error, can't continue probe\n"); 5114 request_ccb->ccb_h.status = status; 5115 xpt_done(request_ccb); 5116 } 5117 } 5118 crit_exit(); 5119 } 5120 5121 static void 5122 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5123 { 5124 xpt_release_path(done_ccb->ccb_h.path); 5125 kfree(done_ccb->ccb_h.path, M_TEMP); 5126 kfree(done_ccb, M_TEMP); 5127 } 5128 5129 static cam_status 5130 proberegister(struct cam_periph *periph, void *arg) 5131 { 5132 union ccb *request_ccb; /* CCB representing the probe request */ 5133 probe_softc *softc; 5134 5135 request_ccb = (union ccb *)arg; 5136 if (periph == NULL) { 5137 kprintf("proberegister: periph was NULL!!\n"); 5138 return(CAM_REQ_CMP_ERR); 5139 } 5140 5141 if (request_ccb == NULL) { 5142 kprintf("proberegister: no probe CCB, " 5143 "can't register device\n"); 5144 return(CAM_REQ_CMP_ERR); 5145 } 5146 5147 softc = kmalloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO); 5148 TAILQ_INIT(&softc->request_ccbs); 5149 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5150 periph_links.tqe); 5151 softc->flags = 0; 5152 periph->softc = softc; 5153 cam_periph_acquire(periph); 5154 /* 5155 * Ensure we've waited at least a bus settle 5156 * delay before attempting to probe the device. 5157 * For HBAs that don't do bus resets, this won't make a difference. 5158 */ 5159 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5160 SCSI_DELAY); 5161 probeschedule(periph); 5162 return(CAM_REQ_CMP); 5163 } 5164 5165 static void 5166 probeschedule(struct cam_periph *periph) 5167 { 5168 struct ccb_pathinq cpi; 5169 union ccb *ccb; 5170 probe_softc *softc; 5171 5172 softc = (probe_softc *)periph->softc; 5173 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5174 5175 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5176 cpi.ccb_h.func_code = XPT_PATH_INQ; 5177 xpt_action((union ccb *)&cpi); 5178 5179 /* 5180 * If a device has gone away and another device, or the same one, 5181 * is back in the same place, it should have a unit attention 5182 * condition pending. It will not report the unit attention in 5183 * response to an inquiry, which may leave invalid transfer 5184 * negotiations in effect. The TUR will reveal the unit attention 5185 * condition. Only send the TUR for lun 0, since some devices 5186 * will get confused by commands other than inquiry to non-existent 5187 * luns. If you think a device has gone away start your scan from 5188 * lun 0. This will insure that any bogus transfer settings are 5189 * invalidated. 5190 * 5191 * If we haven't seen the device before and the controller supports 5192 * some kind of transfer negotiation, negotiate with the first 5193 * sent command if no bus reset was performed at startup. This 5194 * ensures that the device is not confused by transfer negotiation 5195 * settings left over by loader or BIOS action. 5196 */ 5197 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5198 && (ccb->ccb_h.target_lun == 0)) { 5199 softc->action = PROBE_TUR; 5200 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5201 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5202 proberequestdefaultnegotiation(periph); 5203 softc->action = PROBE_INQUIRY; 5204 } else { 5205 softc->action = PROBE_INQUIRY; 5206 } 5207 5208 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5209 softc->flags |= PROBE_NO_ANNOUNCE; 5210 else 5211 softc->flags &= ~PROBE_NO_ANNOUNCE; 5212 5213 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5214 } 5215 5216 static void 5217 probestart(struct cam_periph *periph, union ccb *start_ccb) 5218 { 5219 /* Probe the device that our peripheral driver points to */ 5220 struct ccb_scsiio *csio; 5221 probe_softc *softc; 5222 5223 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5224 5225 softc = (probe_softc *)periph->softc; 5226 csio = &start_ccb->csio; 5227 5228 switch (softc->action) { 5229 case PROBE_TUR: 5230 case PROBE_TUR_FOR_NEGOTIATION: 5231 { 5232 scsi_test_unit_ready(csio, 5233 /*retries*/4, 5234 probedone, 5235 MSG_SIMPLE_Q_TAG, 5236 SSD_FULL_SIZE, 5237 /*timeout*/60000); 5238 break; 5239 } 5240 case PROBE_INQUIRY: 5241 case PROBE_FULL_INQUIRY: 5242 { 5243 u_int inquiry_len; 5244 struct scsi_inquiry_data *inq_buf; 5245 5246 inq_buf = &periph->path->device->inq_data; 5247 /* 5248 * If the device is currently configured, we calculate an 5249 * MD5 checksum of the inquiry data, and if the serial number 5250 * length is greater than 0, add the serial number data 5251 * into the checksum as well. Once the inquiry and the 5252 * serial number check finish, we attempt to figure out 5253 * whether we still have the same device. 5254 */ 5255 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5256 5257 MD5Init(&softc->context); 5258 MD5Update(&softc->context, (unsigned char *)inq_buf, 5259 sizeof(struct scsi_inquiry_data)); 5260 softc->flags |= PROBE_INQUIRY_CKSUM; 5261 if (periph->path->device->serial_num_len > 0) { 5262 MD5Update(&softc->context, 5263 periph->path->device->serial_num, 5264 periph->path->device->serial_num_len); 5265 softc->flags |= PROBE_SERIAL_CKSUM; 5266 } 5267 MD5Final(softc->digest, &softc->context); 5268 } 5269 5270 if (softc->action == PROBE_INQUIRY) 5271 inquiry_len = SHORT_INQUIRY_LENGTH; 5272 else 5273 inquiry_len = inq_buf->additional_length + 5; 5274 5275 scsi_inquiry(csio, 5276 /*retries*/4, 5277 probedone, 5278 MSG_SIMPLE_Q_TAG, 5279 (u_int8_t *)inq_buf, 5280 inquiry_len, 5281 /*evpd*/FALSE, 5282 /*page_code*/0, 5283 SSD_MIN_SIZE, 5284 /*timeout*/60 * 1000); 5285 break; 5286 } 5287 case PROBE_MODE_SENSE: 5288 { 5289 void *mode_buf; 5290 int mode_buf_len; 5291 5292 mode_buf_len = sizeof(struct scsi_mode_header_6) 5293 + sizeof(struct scsi_mode_blk_desc) 5294 + sizeof(struct scsi_control_page); 5295 mode_buf = kmalloc(mode_buf_len, M_TEMP, M_INTWAIT); 5296 scsi_mode_sense(csio, 5297 /*retries*/4, 5298 probedone, 5299 MSG_SIMPLE_Q_TAG, 5300 /*dbd*/FALSE, 5301 SMS_PAGE_CTRL_CURRENT, 5302 SMS_CONTROL_MODE_PAGE, 5303 mode_buf, 5304 mode_buf_len, 5305 SSD_FULL_SIZE, 5306 /*timeout*/60000); 5307 break; 5308 } 5309 case PROBE_SERIAL_NUM: 5310 { 5311 struct scsi_vpd_unit_serial_number *serial_buf; 5312 struct cam_ed* device; 5313 5314 serial_buf = NULL; 5315 device = periph->path->device; 5316 device->serial_num = NULL; 5317 device->serial_num_len = 0; 5318 5319 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5320 serial_buf = kmalloc(sizeof(*serial_buf), M_TEMP, 5321 M_INTWAIT | M_ZERO); 5322 scsi_inquiry(csio, 5323 /*retries*/4, 5324 probedone, 5325 MSG_SIMPLE_Q_TAG, 5326 (u_int8_t *)serial_buf, 5327 sizeof(*serial_buf), 5328 /*evpd*/TRUE, 5329 SVPD_UNIT_SERIAL_NUMBER, 5330 SSD_MIN_SIZE, 5331 /*timeout*/60 * 1000); 5332 break; 5333 } 5334 /* 5335 * We'll have to do without, let our probedone 5336 * routine finish up for us. 5337 */ 5338 start_ccb->csio.data_ptr = NULL; 5339 probedone(periph, start_ccb); 5340 return; 5341 } 5342 } 5343 xpt_action(start_ccb); 5344 } 5345 5346 static void 5347 proberequestdefaultnegotiation(struct cam_periph *periph) 5348 { 5349 struct ccb_trans_settings cts; 5350 5351 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5352 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5353 cts.flags = CCB_TRANS_USER_SETTINGS; 5354 xpt_action((union ccb *)&cts); 5355 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5356 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5357 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5358 xpt_action((union ccb *)&cts); 5359 } 5360 5361 static void 5362 probedone(struct cam_periph *periph, union ccb *done_ccb) 5363 { 5364 probe_softc *softc; 5365 struct cam_path *path; 5366 u_int32_t priority; 5367 5368 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5369 5370 softc = (probe_softc *)periph->softc; 5371 path = done_ccb->ccb_h.path; 5372 priority = done_ccb->ccb_h.pinfo.priority; 5373 5374 switch (softc->action) { 5375 case PROBE_TUR: 5376 { 5377 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5378 5379 if (cam_periph_error(done_ccb, 0, 5380 SF_NO_PRINT, NULL) == ERESTART) 5381 return; 5382 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5383 /* Don't wedge the queue */ 5384 xpt_release_devq(done_ccb->ccb_h.path, 5385 /*count*/1, 5386 /*run_queue*/TRUE); 5387 } 5388 softc->action = PROBE_INQUIRY; 5389 xpt_release_ccb(done_ccb); 5390 xpt_schedule(periph, priority); 5391 return; 5392 } 5393 case PROBE_INQUIRY: 5394 case PROBE_FULL_INQUIRY: 5395 { 5396 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5397 struct scsi_inquiry_data *inq_buf; 5398 u_int8_t periph_qual; 5399 5400 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5401 inq_buf = &path->device->inq_data; 5402 5403 periph_qual = SID_QUAL(inq_buf); 5404 5405 switch(periph_qual) { 5406 case SID_QUAL_LU_CONNECTED: 5407 { 5408 u_int8_t alen; 5409 5410 /* 5411 * We conservatively request only 5412 * SHORT_INQUIRY_LEN bytes of inquiry 5413 * information during our first try 5414 * at sending an INQUIRY. If the device 5415 * has more information to give, 5416 * perform a second request specifying 5417 * the amount of information the device 5418 * is willing to give. 5419 */ 5420 alen = inq_buf->additional_length; 5421 if (softc->action == PROBE_INQUIRY 5422 && alen > (SHORT_INQUIRY_LENGTH - 5)) { 5423 softc->action = PROBE_FULL_INQUIRY; 5424 xpt_release_ccb(done_ccb); 5425 xpt_schedule(periph, priority); 5426 return; 5427 } 5428 5429 xpt_find_quirk(path->device); 5430 5431 if ((inq_buf->flags & SID_CmdQue) != 0) 5432 softc->action = PROBE_MODE_SENSE; 5433 else 5434 softc->action = PROBE_SERIAL_NUM; 5435 5436 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5437 xpt_reference_device(path->device); 5438 5439 xpt_release_ccb(done_ccb); 5440 xpt_schedule(periph, priority); 5441 return; 5442 } 5443 default: 5444 break; 5445 } 5446 } else if (cam_periph_error(done_ccb, 0, 5447 done_ccb->ccb_h.target_lun > 0 5448 ? SF_RETRY_UA|SF_QUIET_IR 5449 : SF_RETRY_UA, 5450 &softc->saved_ccb) == ERESTART) { 5451 return; 5452 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5453 /* Don't wedge the queue */ 5454 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5455 /*run_queue*/TRUE); 5456 } 5457 /* 5458 * If we get to this point, we got an error status back 5459 * from the inquiry and the error status doesn't require 5460 * automatically retrying the command. Therefore, the 5461 * inquiry failed. If we had inquiry information before 5462 * for this device, but this latest inquiry command failed, 5463 * the device has probably gone away. If this device isn't 5464 * already marked unconfigured, notify the peripheral 5465 * drivers that this device is no more. 5466 */ 5467 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5468 /* Send the async notification. */ 5469 xpt_async(AC_LOST_DEVICE, path, NULL); 5470 } 5471 5472 xpt_release_ccb(done_ccb); 5473 break; 5474 } 5475 case PROBE_MODE_SENSE: 5476 { 5477 struct ccb_scsiio *csio; 5478 struct scsi_mode_header_6 *mode_hdr; 5479 5480 csio = &done_ccb->csio; 5481 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5482 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5483 struct scsi_control_page *page; 5484 u_int8_t *offset; 5485 5486 offset = ((u_int8_t *)&mode_hdr[1]) 5487 + mode_hdr->blk_desc_len; 5488 page = (struct scsi_control_page *)offset; 5489 path->device->queue_flags = page->queue_flags; 5490 } else if (cam_periph_error(done_ccb, 0, 5491 SF_RETRY_UA|SF_NO_PRINT, 5492 &softc->saved_ccb) == ERESTART) { 5493 return; 5494 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5495 /* Don't wedge the queue */ 5496 xpt_release_devq(done_ccb->ccb_h.path, 5497 /*count*/1, /*run_queue*/TRUE); 5498 } 5499 xpt_release_ccb(done_ccb); 5500 kfree(mode_hdr, M_TEMP); 5501 softc->action = PROBE_SERIAL_NUM; 5502 xpt_schedule(periph, priority); 5503 return; 5504 } 5505 case PROBE_SERIAL_NUM: 5506 { 5507 struct ccb_scsiio *csio; 5508 struct scsi_vpd_unit_serial_number *serial_buf; 5509 u_int32_t priority; 5510 int changed; 5511 int have_serialnum; 5512 5513 changed = 1; 5514 have_serialnum = 0; 5515 csio = &done_ccb->csio; 5516 priority = done_ccb->ccb_h.pinfo.priority; 5517 serial_buf = 5518 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5519 5520 /* Clean up from previous instance of this device */ 5521 if (path->device->serial_num != NULL) { 5522 kfree(path->device->serial_num, M_DEVBUF); 5523 path->device->serial_num = NULL; 5524 path->device->serial_num_len = 0; 5525 } 5526 5527 if (serial_buf == NULL) { 5528 /* 5529 * Don't process the command as it was never sent 5530 */ 5531 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5532 && (serial_buf->length > 0)) { 5533 5534 have_serialnum = 1; 5535 path->device->serial_num = 5536 kmalloc((serial_buf->length + 1), 5537 M_DEVBUF, M_INTWAIT); 5538 bcopy(serial_buf->serial_num, 5539 path->device->serial_num, 5540 serial_buf->length); 5541 path->device->serial_num_len = serial_buf->length; 5542 path->device->serial_num[serial_buf->length] = '\0'; 5543 } else if (cam_periph_error(done_ccb, 0, 5544 SF_RETRY_UA|SF_NO_PRINT, 5545 &softc->saved_ccb) == ERESTART) { 5546 return; 5547 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5548 /* Don't wedge the queue */ 5549 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5550 /*run_queue*/TRUE); 5551 } 5552 5553 /* 5554 * Let's see if we have seen this device before. 5555 */ 5556 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5557 MD5_CTX context; 5558 u_int8_t digest[16]; 5559 5560 MD5Init(&context); 5561 5562 MD5Update(&context, 5563 (unsigned char *)&path->device->inq_data, 5564 sizeof(struct scsi_inquiry_data)); 5565 5566 if (have_serialnum) 5567 MD5Update(&context, serial_buf->serial_num, 5568 serial_buf->length); 5569 5570 MD5Final(digest, &context); 5571 if (bcmp(softc->digest, digest, 16) == 0) 5572 changed = 0; 5573 5574 /* 5575 * XXX Do we need to do a TUR in order to ensure 5576 * that the device really hasn't changed??? 5577 */ 5578 if ((changed != 0) 5579 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5580 xpt_async(AC_LOST_DEVICE, path, NULL); 5581 } 5582 if (serial_buf != NULL) 5583 kfree(serial_buf, M_TEMP); 5584 5585 if (changed != 0) { 5586 /* 5587 * Now that we have all the necessary 5588 * information to safely perform transfer 5589 * negotiations... Controllers don't perform 5590 * any negotiation or tagged queuing until 5591 * after the first XPT_SET_TRAN_SETTINGS ccb is 5592 * received. So, on a new device, just retreive 5593 * the user settings, and set them as the current 5594 * settings to set the device up. 5595 */ 5596 proberequestdefaultnegotiation(periph); 5597 xpt_release_ccb(done_ccb); 5598 5599 /* 5600 * Perform a TUR to allow the controller to 5601 * perform any necessary transfer negotiation. 5602 */ 5603 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5604 xpt_schedule(periph, priority); 5605 return; 5606 } 5607 xpt_release_ccb(done_ccb); 5608 break; 5609 } 5610 case PROBE_TUR_FOR_NEGOTIATION: 5611 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5612 /* Don't wedge the queue */ 5613 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5614 /*run_queue*/TRUE); 5615 } 5616 5617 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5618 xpt_reference_device(path->device); 5619 5620 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5621 /* Inform the XPT that a new device has been found */ 5622 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5623 xpt_action(done_ccb); 5624 5625 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5626 } 5627 xpt_release_ccb(done_ccb); 5628 break; 5629 } 5630 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5631 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5632 done_ccb->ccb_h.status = CAM_REQ_CMP; 5633 xpt_done(done_ccb); 5634 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5635 cam_periph_invalidate(periph); 5636 cam_periph_release(periph); 5637 } else { 5638 probeschedule(periph); 5639 } 5640 } 5641 5642 static void 5643 probecleanup(struct cam_periph *periph) 5644 { 5645 kfree(periph->softc, M_TEMP); 5646 } 5647 5648 static void 5649 xpt_find_quirk(struct cam_ed *device) 5650 { 5651 caddr_t match; 5652 5653 match = cam_quirkmatch((caddr_t)&device->inq_data, 5654 (caddr_t)xpt_quirk_table, 5655 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5656 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5657 5658 if (match == NULL) 5659 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5660 5661 device->quirk = (struct xpt_quirk_entry *)match; 5662 } 5663 5664 static void 5665 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5666 int async_update) 5667 { 5668 struct cam_sim *sim; 5669 int qfrozen; 5670 5671 sim = cts->ccb_h.path->bus->sim; 5672 if (async_update == FALSE) { 5673 struct scsi_inquiry_data *inq_data; 5674 struct ccb_pathinq cpi; 5675 struct ccb_trans_settings cur_cts; 5676 5677 if (device == NULL) { 5678 cts->ccb_h.status = CAM_PATH_INVALID; 5679 xpt_done((union ccb *)cts); 5680 return; 5681 } 5682 5683 /* 5684 * Perform sanity checking against what the 5685 * controller and device can do. 5686 */ 5687 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 5688 cpi.ccb_h.func_code = XPT_PATH_INQ; 5689 xpt_action((union ccb *)&cpi); 5690 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 5691 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5692 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 5693 xpt_action((union ccb *)&cur_cts); 5694 inq_data = &device->inq_data; 5695 5696 /* Fill in any gaps in what the user gave us */ 5697 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 5698 cts->sync_period = cur_cts.sync_period; 5699 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 5700 cts->sync_offset = cur_cts.sync_offset; 5701 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 5702 cts->bus_width = cur_cts.bus_width; 5703 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 5704 cts->flags &= ~CCB_TRANS_DISC_ENB; 5705 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 5706 } 5707 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 5708 cts->flags &= ~CCB_TRANS_TAG_ENB; 5709 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 5710 } 5711 5712 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 5713 && (inq_data->flags & SID_Sync) == 0) 5714 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 5715 || (cts->sync_offset == 0) 5716 || (cts->sync_period == 0)) { 5717 /* Force async */ 5718 cts->sync_period = 0; 5719 cts->sync_offset = 0; 5720 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) { 5721 5722 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 5723 && cts->sync_period <= 0x9) { 5724 /* 5725 * Don't allow DT transmission rates if the 5726 * device does not support it. 5727 */ 5728 cts->sync_period = 0xa; 5729 } 5730 if ((inq_data->spi3data & SID_SPI_IUS) == 0 5731 && cts->sync_period <= 0x8) { 5732 /* 5733 * Don't allow PACE transmission rates 5734 * if the device does support packetized 5735 * transfers. 5736 */ 5737 cts->sync_period = 0x9; 5738 } 5739 } 5740 5741 switch (cts->bus_width) { 5742 case MSG_EXT_WDTR_BUS_32_BIT: 5743 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5744 || (inq_data->flags & SID_WBus32) != 0) 5745 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 5746 break; 5747 /* Fall Through to 16-bit */ 5748 case MSG_EXT_WDTR_BUS_16_BIT: 5749 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5750 || (inq_data->flags & SID_WBus16) != 0) 5751 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 5752 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 5753 break; 5754 } 5755 /* Fall Through to 8-bit */ 5756 default: /* New bus width?? */ 5757 case MSG_EXT_WDTR_BUS_8_BIT: 5758 /* All targets can do this */ 5759 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 5760 break; 5761 } 5762 5763 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 5764 /* 5765 * Can't tag queue without disconnection. 5766 */ 5767 cts->flags &= ~CCB_TRANS_TAG_ENB; 5768 cts->valid |= CCB_TRANS_TQ_VALID; 5769 } 5770 5771 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 5772 || (inq_data->flags & SID_CmdQue) == 0 5773 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 5774 || (device->quirk->mintags == 0)) { 5775 /* 5776 * Can't tag on hardware that doesn't support, 5777 * doesn't have it enabled, or has broken tag support. 5778 */ 5779 cts->flags &= ~CCB_TRANS_TAG_ENB; 5780 } 5781 } 5782 5783 qfrozen = FALSE; 5784 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 5785 int device_tagenb; 5786 5787 /* 5788 * If we are transitioning from tags to no-tags or 5789 * vice-versa, we need to carefully freeze and restart 5790 * the queue so that we don't overlap tagged and non-tagged 5791 * commands. We also temporarily stop tags if there is 5792 * a change in transfer negotiation settings to allow 5793 * "tag-less" negotiation. 5794 */ 5795 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5796 || (device->inq_flags & SID_CmdQue) != 0) 5797 device_tagenb = TRUE; 5798 else 5799 device_tagenb = FALSE; 5800 5801 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 5802 && device_tagenb == FALSE) 5803 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 5804 && device_tagenb == TRUE)) { 5805 5806 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 5807 /* 5808 * Delay change to use tags until after a 5809 * few commands have gone to this device so 5810 * the controller has time to perform transfer 5811 * negotiations without tagged messages getting 5812 * in the way. 5813 */ 5814 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 5815 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 5816 } else { 5817 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 5818 qfrozen = TRUE; 5819 device->inq_flags &= ~SID_CmdQue; 5820 xpt_dev_ccbq_resize(cts->ccb_h.path, 5821 sim->max_dev_openings); 5822 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5823 device->tag_delay_count = 0; 5824 } 5825 } 5826 } 5827 5828 if (async_update == FALSE) { 5829 /* 5830 * If we are currently performing tagged transactions to 5831 * this device and want to change its negotiation parameters, 5832 * go non-tagged for a bit to give the controller a chance to 5833 * negotiate unhampered by tag messages. 5834 */ 5835 if ((device->inq_flags & SID_CmdQue) != 0 5836 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 5837 CCB_TRANS_SYNC_OFFSET_VALID| 5838 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 5839 xpt_toggle_tags(cts->ccb_h.path); 5840 5841 (*(sim->sim_action))(sim, (union ccb *)cts); 5842 } 5843 5844 if (qfrozen) { 5845 struct ccb_relsim crs; 5846 5847 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 5848 /*priority*/1); 5849 crs.ccb_h.func_code = XPT_REL_SIMQ; 5850 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5851 crs.openings 5852 = crs.release_timeout 5853 = crs.qfrozen_cnt 5854 = 0; 5855 xpt_action((union ccb *)&crs); 5856 } 5857 } 5858 5859 static void 5860 xpt_toggle_tags(struct cam_path *path) 5861 { 5862 struct cam_ed *dev; 5863 5864 /* 5865 * Give controllers a chance to renegotiate 5866 * before starting tag operations. We 5867 * "toggle" tagged queuing off then on 5868 * which causes the tag enable command delay 5869 * counter to come into effect. 5870 */ 5871 dev = path->device; 5872 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5873 || ((dev->inq_flags & SID_CmdQue) != 0 5874 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 5875 struct ccb_trans_settings cts; 5876 5877 xpt_setup_ccb(&cts.ccb_h, path, 1); 5878 cts.flags = 0; 5879 cts.valid = CCB_TRANS_TQ_VALID; 5880 xpt_set_transfer_settings(&cts, path->device, 5881 /*async_update*/TRUE); 5882 cts.flags = CCB_TRANS_TAG_ENB; 5883 xpt_set_transfer_settings(&cts, path->device, 5884 /*async_update*/TRUE); 5885 } 5886 } 5887 5888 static void 5889 xpt_start_tags(struct cam_path *path) 5890 { 5891 struct ccb_relsim crs; 5892 struct cam_ed *device; 5893 struct cam_sim *sim; 5894 int newopenings; 5895 5896 device = path->device; 5897 sim = path->bus->sim; 5898 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5899 xpt_freeze_devq(path, /*count*/1); 5900 device->inq_flags |= SID_CmdQue; 5901 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 5902 xpt_dev_ccbq_resize(path, newopenings); 5903 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 5904 crs.ccb_h.func_code = XPT_REL_SIMQ; 5905 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5906 crs.openings 5907 = crs.release_timeout 5908 = crs.qfrozen_cnt 5909 = 0; 5910 xpt_action((union ccb *)&crs); 5911 } 5912 5913 static int busses_to_config; 5914 static int busses_to_reset; 5915 5916 static int 5917 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 5918 { 5919 if (bus->path_id != CAM_XPT_PATH_ID) { 5920 struct cam_path path; 5921 struct ccb_pathinq cpi; 5922 int can_negotiate; 5923 5924 busses_to_config++; 5925 xpt_compile_path(&path, NULL, bus->path_id, 5926 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5927 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 5928 cpi.ccb_h.func_code = XPT_PATH_INQ; 5929 xpt_action((union ccb *)&cpi); 5930 can_negotiate = cpi.hba_inquiry; 5931 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 5932 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 5933 && can_negotiate) 5934 busses_to_reset++; 5935 xpt_release_path(&path); 5936 } 5937 5938 return(1); 5939 } 5940 5941 static int 5942 xptconfigfunc(struct cam_eb *bus, void *arg) 5943 { 5944 struct cam_path *path; 5945 union ccb *work_ccb; 5946 5947 if (bus->path_id != CAM_XPT_PATH_ID) { 5948 cam_status status; 5949 int can_negotiate; 5950 5951 work_ccb = xpt_alloc_ccb(); 5952 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 5953 CAM_TARGET_WILDCARD, 5954 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 5955 kprintf("xptconfigfunc: xpt_create_path failed with " 5956 "status %#x for bus %d\n", status, bus->path_id); 5957 kprintf("xptconfigfunc: halting bus configuration\n"); 5958 xpt_free_ccb(work_ccb); 5959 busses_to_config--; 5960 xpt_finishconfig(xpt_periph, NULL); 5961 return(0); 5962 } 5963 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5964 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5965 xpt_action(work_ccb); 5966 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5967 kprintf("xptconfigfunc: CPI failed on bus %d " 5968 "with status %d\n", bus->path_id, 5969 work_ccb->ccb_h.status); 5970 xpt_finishconfig(xpt_periph, work_ccb); 5971 return(1); 5972 } 5973 5974 can_negotiate = work_ccb->cpi.hba_inquiry; 5975 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 5976 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 5977 && (can_negotiate != 0)) { 5978 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5979 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5980 work_ccb->ccb_h.cbfcnp = NULL; 5981 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 5982 ("Resetting Bus\n")); 5983 xpt_action(work_ccb); 5984 xpt_finishconfig(xpt_periph, work_ccb); 5985 } else { 5986 /* Act as though we performed a successful BUS RESET */ 5987 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5988 xpt_finishconfig(xpt_periph, work_ccb); 5989 } 5990 } 5991 5992 return(1); 5993 } 5994 5995 static void 5996 xpt_config(void *arg) 5997 { 5998 /* Now that interrupts are enabled, go find our devices */ 5999 6000 #ifdef CAMDEBUG 6001 /* Setup debugging flags and path */ 6002 #ifdef CAM_DEBUG_FLAGS 6003 cam_dflags = CAM_DEBUG_FLAGS; 6004 #else /* !CAM_DEBUG_FLAGS */ 6005 cam_dflags = CAM_DEBUG_NONE; 6006 #endif /* CAM_DEBUG_FLAGS */ 6007 #ifdef CAM_DEBUG_BUS 6008 if (cam_dflags != CAM_DEBUG_NONE) { 6009 if (xpt_create_path(&cam_dpath, xpt_periph, 6010 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6011 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6012 kprintf("xpt_config: xpt_create_path() failed for debug" 6013 " target %d:%d:%d, debugging disabled\n", 6014 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6015 cam_dflags = CAM_DEBUG_NONE; 6016 } 6017 } else 6018 cam_dpath = NULL; 6019 #else /* !CAM_DEBUG_BUS */ 6020 cam_dpath = NULL; 6021 #endif /* CAM_DEBUG_BUS */ 6022 #endif /* CAMDEBUG */ 6023 6024 /* 6025 * Scan all installed busses. 6026 */ 6027 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6028 6029 if (busses_to_config == 0) { 6030 /* Call manually because we don't have any busses */ 6031 xpt_finishconfig(xpt_periph, NULL); 6032 } else { 6033 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) { 6034 kprintf("Waiting %d seconds for SCSI " 6035 "devices to settle\n", SCSI_DELAY/1000); 6036 } 6037 xpt_for_all_busses(xptconfigfunc, NULL); 6038 } 6039 } 6040 6041 /* 6042 * If the given device only has one peripheral attached to it, and if that 6043 * peripheral is the passthrough driver, announce it. This insures that the 6044 * user sees some sort of announcement for every peripheral in their system. 6045 */ 6046 static int 6047 xptpassannouncefunc(struct cam_ed *device, void *arg) 6048 { 6049 struct cam_periph *periph; 6050 int i; 6051 6052 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6053 periph = SLIST_NEXT(periph, periph_links), i++); 6054 6055 periph = SLIST_FIRST(&device->periphs); 6056 if ((i == 1) 6057 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6058 xpt_announce_periph(periph, NULL); 6059 6060 return(1); 6061 } 6062 6063 static void 6064 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6065 { 6066 struct periph_driver **p_drv; 6067 6068 if (done_ccb != NULL) { 6069 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6070 ("xpt_finishconfig\n")); 6071 switch(done_ccb->ccb_h.func_code) { 6072 case XPT_RESET_BUS: 6073 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6074 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6075 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6076 xpt_action(done_ccb); 6077 return; 6078 } 6079 /* FALLTHROUGH */ 6080 case XPT_SCAN_BUS: 6081 default: 6082 xpt_free_path(done_ccb->ccb_h.path); 6083 busses_to_config--; 6084 break; 6085 } 6086 } 6087 6088 if (busses_to_config == 0) { 6089 /* Register all the peripheral drivers */ 6090 /* XXX This will have to change when we have loadable modules */ 6091 SET_FOREACH(p_drv, periphdriver_set) { 6092 (*p_drv)->init(); 6093 } 6094 6095 /* 6096 * Check for devices with no "standard" peripheral driver 6097 * attached. For any devices like that, announce the 6098 * passthrough driver so the user will see something. 6099 */ 6100 xpt_for_all_devices(xptpassannouncefunc, NULL); 6101 6102 /* Release our hook so that the boot can continue. */ 6103 config_intrhook_disestablish(xpt_config_hook); 6104 kfree(xpt_config_hook, M_TEMP); 6105 xpt_config_hook = NULL; 6106 } 6107 if (done_ccb != NULL) 6108 xpt_free_ccb(done_ccb); 6109 } 6110 6111 static void 6112 xptaction(struct cam_sim *sim, union ccb *work_ccb) 6113 { 6114 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6115 6116 switch (work_ccb->ccb_h.func_code) { 6117 /* Common cases first */ 6118 case XPT_PATH_INQ: /* Path routing inquiry */ 6119 { 6120 struct ccb_pathinq *cpi; 6121 6122 cpi = &work_ccb->cpi; 6123 cpi->version_num = 1; /* XXX??? */ 6124 cpi->hba_inquiry = 0; 6125 cpi->target_sprt = 0; 6126 cpi->hba_misc = 0; 6127 cpi->hba_eng_cnt = 0; 6128 cpi->max_target = 0; 6129 cpi->max_lun = 0; 6130 cpi->initiator_id = 0; 6131 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6132 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6133 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6134 cpi->unit_number = sim->unit_number; 6135 cpi->bus_id = sim->bus_id; 6136 cpi->base_transfer_speed = 0; 6137 cpi->ccb_h.status = CAM_REQ_CMP; 6138 xpt_done(work_ccb); 6139 break; 6140 } 6141 default: 6142 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6143 xpt_done(work_ccb); 6144 break; 6145 } 6146 } 6147 6148 /* 6149 * The xpt as a "controller" has no interrupt sources, so polling 6150 * is a no-op. 6151 */ 6152 static void 6153 xptpoll(struct cam_sim *sim) 6154 { 6155 } 6156 6157 /* 6158 * Should only be called by the machine interrupt dispatch routines, 6159 * so put these prototypes here instead of in the header. 6160 */ 6161 6162 static void 6163 swi_camnet(void *arg, void *frame) 6164 { 6165 camisr(&cam_netq); 6166 } 6167 6168 static void 6169 swi_cambio(void *arg, void *frame) 6170 { 6171 camisr(&cam_bioq); 6172 } 6173 6174 static void 6175 camisr(cam_isrq_t *queue) 6176 { 6177 struct ccb_hdr *ccb_h; 6178 6179 crit_enter(); 6180 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6181 int runq; 6182 6183 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6184 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6185 splz(); 6186 6187 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6188 ("camisr\n")); 6189 6190 runq = FALSE; 6191 6192 if (ccb_h->flags & CAM_HIGH_POWER) { 6193 struct highpowerlist *hphead; 6194 struct cam_ed *device; 6195 union ccb *send_ccb; 6196 6197 hphead = &highpowerq; 6198 6199 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6200 6201 /* 6202 * Increment the count since this command is done. 6203 */ 6204 num_highpower++; 6205 6206 /* 6207 * Any high powered commands queued up? 6208 */ 6209 if (send_ccb != NULL) { 6210 device = send_ccb->ccb_h.path->device; 6211 6212 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6213 6214 xpt_release_devq(send_ccb->ccb_h.path, 6215 /*count*/1, /*runqueue*/TRUE); 6216 } 6217 } 6218 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6219 struct cam_ed *dev; 6220 6221 dev = ccb_h->path->device; 6222 6223 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6224 6225 if (ccb_h->path->bus->sim->devq) { 6226 ccb_h->path->bus->sim->devq->send_active--; 6227 ccb_h->path->bus->sim->devq->send_openings++; 6228 } 6229 6230 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6231 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6232 && (dev->ccbq.dev_active == 0))) { 6233 6234 xpt_release_devq(ccb_h->path, /*count*/1, 6235 /*run_queue*/TRUE); 6236 } 6237 6238 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6239 && (--dev->tag_delay_count == 0)) 6240 xpt_start_tags(ccb_h->path); 6241 6242 if ((dev->ccbq.queue.entries > 0) 6243 && (dev->qfrozen_cnt == 0) 6244 && (device_is_send_queued(dev) == 0)) { 6245 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6246 dev); 6247 } 6248 } 6249 6250 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6251 xpt_release_simq(ccb_h->path->bus->sim, 6252 /*run_queue*/TRUE); 6253 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6254 runq = FALSE; 6255 } 6256 6257 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6258 && (ccb_h->status & CAM_DEV_QFRZN)) { 6259 xpt_release_devq(ccb_h->path, /*count*/1, 6260 /*run_queue*/TRUE); 6261 ccb_h->status &= ~CAM_DEV_QFRZN; 6262 } else if (runq) { 6263 xpt_run_dev_sendq(ccb_h->path->bus); 6264 } 6265 6266 /* Call the peripheral driver's callback */ 6267 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6268 } 6269 crit_exit(); 6270 } 6271