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 1.43 2007/11/24 19:19:43 pavalos Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/md5.h> 42 #include <sys/devicestat.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/bus.h> 46 #include <sys/thread.h> 47 #include <sys/thread2.h> 48 49 #include <machine/clock.h> 50 51 #include "cam.h" 52 #include "cam_ccb.h" 53 #include "cam_periph.h" 54 #include "cam_sim.h" 55 #include "cam_xpt.h" 56 #include "cam_xpt_sim.h" 57 #include "cam_xpt_periph.h" 58 #include "cam_debug.h" 59 60 #include "scsi/scsi_all.h" 61 #include "scsi/scsi_message.h" 62 #include "scsi/scsi_pass.h" 63 #include "opt_cam.h" 64 65 /* Datastructures internal to the xpt layer */ 66 67 /* 68 * Definition of an async handler callback block. These are used to add 69 * SIMs and peripherals to the async callback lists. 70 */ 71 struct async_node { 72 SLIST_ENTRY(async_node) links; 73 u_int32_t event_enable; /* Async Event enables */ 74 void (*callback)(void *arg, u_int32_t code, 75 struct cam_path *path, void *args); 76 void *callback_arg; 77 }; 78 79 SLIST_HEAD(async_list, async_node); 80 SLIST_HEAD(periph_list, cam_periph); 81 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 82 83 /* 84 * This is the maximum number of high powered commands (e.g. start unit) 85 * that can be outstanding at a particular time. 86 */ 87 #ifndef CAM_MAX_HIGHPOWER 88 #define CAM_MAX_HIGHPOWER 4 89 #endif 90 91 /* number of high powered commands that can go through right now */ 92 static int num_highpower = CAM_MAX_HIGHPOWER; 93 94 /* 95 * Structure for queueing a device in a run queue. 96 * There is one run queue for allocating new ccbs, 97 * and another for sending ccbs to the controller. 98 */ 99 struct cam_ed_qinfo { 100 cam_pinfo pinfo; 101 struct cam_ed *device; 102 }; 103 104 /* 105 * The CAM EDT (Existing Device Table) contains the device information for 106 * all devices for all busses in the system. The table contains a 107 * cam_ed structure for each device on the bus. 108 */ 109 struct cam_ed { 110 TAILQ_ENTRY(cam_ed) links; 111 struct cam_ed_qinfo alloc_ccb_entry; 112 struct cam_ed_qinfo send_ccb_entry; 113 struct cam_et *target; 114 lun_id_t lun_id; 115 struct camq drvq; /* 116 * Queue of type drivers wanting to do 117 * work on this device. 118 */ 119 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 120 struct async_list asyncs; /* Async callback info for this B/T/L */ 121 struct periph_list periphs; /* All attached devices */ 122 u_int generation; /* Generation number */ 123 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 124 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 125 /* Storage for the inquiry data */ 126 #ifdef CAM_NEW_TRAN_CODE 127 cam_proto protocol; 128 u_int protocol_version; 129 cam_xport transport; 130 u_int transport_version; 131 #endif /* CAM_NEW_TRAN_CODE */ 132 struct scsi_inquiry_data inq_data; 133 u_int8_t inq_flags; /* 134 * Current settings for inquiry flags. 135 * This allows us to override settings 136 * like disconnection and tagged 137 * queuing for a device. 138 */ 139 u_int8_t queue_flags; /* Queue flags from the control page */ 140 u_int8_t serial_num_len; 141 u_int8_t *serial_num; 142 u_int32_t qfrozen_cnt; 143 u_int32_t flags; 144 #define CAM_DEV_UNCONFIGURED 0x01 145 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 146 #define CAM_DEV_REL_ON_COMPLETE 0x04 147 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 148 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 149 #define CAM_DEV_TAG_AFTER_COUNT 0x20 150 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 151 u_int32_t tag_delay_count; 152 #define CAM_TAG_DELAY_COUNT 5 153 u_int32_t refcount; 154 struct callout c_handle; 155 }; 156 157 /* 158 * Each target is represented by an ET (Existing Target). These 159 * entries are created when a target is successfully probed with an 160 * identify, and removed when a device fails to respond after a number 161 * of retries, or a bus rescan finds the device missing. 162 */ 163 struct cam_et { 164 TAILQ_HEAD(, cam_ed) ed_entries; 165 TAILQ_ENTRY(cam_et) links; 166 struct cam_eb *bus; 167 target_id_t target_id; 168 u_int32_t refcount; 169 u_int generation; 170 struct timeval last_reset; /* uptime of last reset */ 171 }; 172 173 /* 174 * Each bus is represented by an EB (Existing Bus). These entries 175 * are created by calls to xpt_bus_register and deleted by calls to 176 * xpt_bus_deregister. 177 */ 178 struct cam_eb { 179 TAILQ_HEAD(, cam_et) et_entries; 180 TAILQ_ENTRY(cam_eb) links; 181 path_id_t path_id; 182 struct cam_sim *sim; 183 struct timeval last_reset; /* uptime of last reset */ 184 u_int32_t flags; 185 #define CAM_EB_RUNQ_SCHEDULED 0x01 186 u_int32_t refcount; 187 u_int generation; 188 }; 189 190 struct cam_path { 191 struct cam_periph *periph; 192 struct cam_eb *bus; 193 struct cam_et *target; 194 struct cam_ed *device; 195 }; 196 197 struct xpt_quirk_entry { 198 struct scsi_inquiry_pattern inq_pat; 199 u_int8_t quirks; 200 #define CAM_QUIRK_NOLUNS 0x01 201 #define CAM_QUIRK_NOSERIAL 0x02 202 #define CAM_QUIRK_HILUNS 0x04 203 u_int mintags; 204 u_int maxtags; 205 }; 206 #define CAM_SCSI2_MAXLUN 8 207 208 typedef enum { 209 XPT_FLAG_OPEN = 0x01 210 } xpt_flags; 211 212 struct xpt_softc { 213 xpt_flags flags; 214 u_int32_t generation; 215 }; 216 217 static const char quantum[] = "QUANTUM"; 218 static const char sony[] = "SONY"; 219 static const char west_digital[] = "WDIGTL"; 220 static const char samsung[] = "SAMSUNG"; 221 static const char seagate[] = "SEAGATE"; 222 static const char microp[] = "MICROP"; 223 224 static struct xpt_quirk_entry xpt_quirk_table[] = 225 { 226 { 227 /* Reports QUEUE FULL for temporary resource shortages */ 228 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 229 /*quirks*/0, /*mintags*/24, /*maxtags*/32 230 }, 231 { 232 /* Reports QUEUE FULL for temporary resource shortages */ 233 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 234 /*quirks*/0, /*mintags*/24, /*maxtags*/32 235 }, 236 { 237 /* Reports QUEUE FULL for temporary resource shortages */ 238 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 239 /*quirks*/0, /*mintags*/24, /*maxtags*/32 240 }, 241 { 242 /* Broken tagged queuing drive */ 243 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 244 /*quirks*/0, /*mintags*/0, /*maxtags*/0 245 }, 246 { 247 /* Broken tagged queuing drive */ 248 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 249 /*quirks*/0, /*mintags*/0, /*maxtags*/0 250 }, 251 { 252 /* Broken tagged queuing drive */ 253 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 254 /*quirks*/0, /*mintags*/0, /*maxtags*/0 255 }, 256 { 257 /* 258 * Unfortunately, the Quantum Atlas III has the same 259 * problem as the Atlas II drives above. 260 * Reported by: "Johan Granlund" <johan@granlund.nu> 261 * 262 * For future reference, the drive with the problem was: 263 * QUANTUM QM39100TD-SW N1B0 264 * 265 * It's possible that Quantum will fix the problem in later 266 * firmware revisions. If that happens, the quirk entry 267 * will need to be made specific to the firmware revisions 268 * with the problem. 269 * 270 */ 271 /* Reports QUEUE FULL for temporary resource shortages */ 272 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 273 /*quirks*/0, /*mintags*/24, /*maxtags*/32 274 }, 275 { 276 /* 277 * 18 Gig Atlas III, same problem as the 9G version. 278 * Reported by: Andre Albsmeier 279 * <andre.albsmeier@mchp.siemens.de> 280 * 281 * For future reference, the drive with the problem was: 282 * QUANTUM QM318000TD-S N491 283 */ 284 /* Reports QUEUE FULL for temporary resource shortages */ 285 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 286 /*quirks*/0, /*mintags*/24, /*maxtags*/32 287 }, 288 { 289 /* 290 * Broken tagged queuing drive 291 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 292 * and: Martin Renters <martin@tdc.on.ca> 293 */ 294 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 295 /*quirks*/0, /*mintags*/0, /*maxtags*/0 296 }, 297 /* 298 * The Seagate Medalist Pro drives have very poor write 299 * performance with anything more than 2 tags. 300 * 301 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 302 * Drive: <SEAGATE ST36530N 1444> 303 * 304 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 305 * Drive: <SEAGATE ST34520W 1281> 306 * 307 * No one has actually reported that the 9G version 308 * (ST39140*) of the Medalist Pro has the same problem, but 309 * we're assuming that it does because the 4G and 6.5G 310 * versions of the drive are broken. 311 */ 312 { 313 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 314 /*quirks*/0, /*mintags*/2, /*maxtags*/2 315 }, 316 { 317 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 318 /*quirks*/0, /*mintags*/2, /*maxtags*/2 319 }, 320 { 321 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 322 /*quirks*/0, /*mintags*/2, /*maxtags*/2 323 }, 324 { 325 /* 326 * Slow when tagged queueing is enabled. Write performance 327 * steadily drops off with more and more concurrent 328 * transactions. Best sequential write performance with 329 * tagged queueing turned off and write caching turned on. 330 * 331 * PR: kern/10398 332 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 333 * Drive: DCAS-34330 w/ "S65A" firmware. 334 * 335 * The drive with the problem had the "S65A" firmware 336 * revision, and has also been reported (by Stephen J. 337 * Roznowski <sjr@home.net>) for a drive with the "S61A" 338 * firmware revision. 339 * 340 * Although no one has reported problems with the 2 gig 341 * version of the DCAS drive, the assumption is that it 342 * has the same problems as the 4 gig version. Therefore 343 * this quirk entries disables tagged queueing for all 344 * DCAS drives. 345 */ 346 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 347 /*quirks*/0, /*mintags*/0, /*maxtags*/0 348 }, 349 { 350 /* Broken tagged queuing drive */ 351 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 352 /*quirks*/0, /*mintags*/0, /*maxtags*/0 353 }, 354 { 355 /* Broken tagged queuing drive */ 356 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 357 /*quirks*/0, /*mintags*/0, /*maxtags*/0 358 }, 359 { 360 /* 361 * Broken tagged queuing drive. 362 * Submitted by: 363 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 364 * in PR kern/9535 365 */ 366 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 367 /*quirks*/0, /*mintags*/0, /*maxtags*/0 368 }, 369 { 370 /* 371 * Slow when tagged queueing is enabled. (1.5MB/sec versus 372 * 8MB/sec.) 373 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 374 * Best performance with these drives is achieved with 375 * tagged queueing turned off, and write caching turned on. 376 */ 377 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 378 /*quirks*/0, /*mintags*/0, /*maxtags*/0 379 }, 380 { 381 /* 382 * Slow when tagged queueing is enabled. (1.5MB/sec versus 383 * 8MB/sec.) 384 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 385 * Best performance with these drives is achieved with 386 * tagged queueing turned off, and write caching turned on. 387 */ 388 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 389 /*quirks*/0, /*mintags*/0, /*maxtags*/0 390 }, 391 { 392 /* 393 * Doesn't handle queue full condition correctly, 394 * so we need to limit maxtags to what the device 395 * can handle instead of determining this automatically. 396 */ 397 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 398 /*quirks*/0, /*mintags*/2, /*maxtags*/32 399 }, 400 { 401 /* Really only one LUN */ 402 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 403 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 404 }, 405 { 406 /* I can't believe we need a quirk for DPT volumes. */ 407 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 408 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 409 /*mintags*/0, /*maxtags*/255 410 }, 411 { 412 /* 413 * Many Sony CDROM drives don't like multi-LUN probing. 414 */ 415 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 416 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 417 }, 418 { 419 /* 420 * This drive doesn't like multiple LUN probing. 421 * Submitted by: Parag Patel <parag@cgt.com> 422 */ 423 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 424 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 425 }, 426 { 427 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 428 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 429 }, 430 { 431 /* 432 * The 8200 doesn't like multi-lun probing, and probably 433 * don't like serial number requests either. 434 */ 435 { 436 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 437 "EXB-8200*", "*" 438 }, 439 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 440 }, 441 { 442 /* 443 * Let's try the same as above, but for a drive that says 444 * it's an IPL-6860 but is actually an EXB 8200. 445 */ 446 { 447 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 448 "IPL-6860*", "*" 449 }, 450 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 451 }, 452 { 453 /* 454 * These Hitachi drives don't like multi-lun probing. 455 * The PR submitter has a DK319H, but says that the Linux 456 * kernel has a similar work-around for the DK312 and DK314, 457 * so all DK31* drives are quirked here. 458 * PR: misc/18793 459 * Submitted by: Paul Haddad <paul@pth.com> 460 */ 461 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 462 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 463 }, 464 { 465 /* 466 * This old revision of the TDC3600 is also SCSI-1, and 467 * hangs upon serial number probing. 468 */ 469 { 470 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 471 " TDC 3600", "U07:" 472 }, 473 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 474 }, 475 { 476 /* 477 * Would repond to all LUNs if asked for. 478 */ 479 { 480 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 481 "CP150", "*" 482 }, 483 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 484 }, 485 { 486 /* 487 * Would repond to all LUNs if asked for. 488 */ 489 { 490 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 491 "96X2*", "*" 492 }, 493 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 494 }, 495 { 496 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 497 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 498 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 499 }, 500 { 501 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 502 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 503 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 504 }, 505 { 506 /* TeraSolutions special settings for TRC-22 RAID */ 507 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 508 /*quirks*/0, /*mintags*/55, /*maxtags*/255 509 }, 510 { 511 /* Veritas Storage Appliance */ 512 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 513 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 514 }, 515 { 516 /* 517 * Would respond to all LUNs. Device type and removable 518 * flag are jumper-selectable. 519 */ 520 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 521 "Tahiti 1", "*" 522 }, 523 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 524 }, 525 { 526 /* Default tagged queuing parameters for all devices */ 527 { 528 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 529 /*vendor*/"*", /*product*/"*", /*revision*/"*" 530 }, 531 /*quirks*/0, /*mintags*/2, /*maxtags*/255 532 }, 533 }; 534 535 static const int xpt_quirk_table_size = 536 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 537 538 typedef enum { 539 DM_RET_COPY = 0x01, 540 DM_RET_FLAG_MASK = 0x0f, 541 DM_RET_NONE = 0x00, 542 DM_RET_STOP = 0x10, 543 DM_RET_DESCEND = 0x20, 544 DM_RET_ERROR = 0x30, 545 DM_RET_ACTION_MASK = 0xf0 546 } dev_match_ret; 547 548 typedef enum { 549 XPT_DEPTH_BUS, 550 XPT_DEPTH_TARGET, 551 XPT_DEPTH_DEVICE, 552 XPT_DEPTH_PERIPH 553 } xpt_traverse_depth; 554 555 struct xpt_traverse_config { 556 xpt_traverse_depth depth; 557 void *tr_func; 558 void *tr_arg; 559 }; 560 561 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 562 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 563 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 564 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 565 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 566 567 /* Transport layer configuration information */ 568 static struct xpt_softc xsoftc; 569 570 /* Queues for our software interrupt handler */ 571 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 572 static cam_isrq_t cam_bioq; 573 static cam_isrq_t cam_netq; 574 575 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 576 static SLIST_HEAD(,ccb_hdr) ccb_freeq; 577 static u_int xpt_max_ccbs; /* 578 * Maximum size of ccb pool. Modified as 579 * devices are added/removed or have their 580 * opening counts changed. 581 */ 582 static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 583 584 struct cam_periph *xpt_periph; 585 586 static periph_init_t xpt_periph_init; 587 588 static periph_init_t probe_periph_init; 589 590 static struct periph_driver xpt_driver = 591 { 592 xpt_periph_init, "xpt", 593 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 594 }; 595 596 static struct periph_driver probe_driver = 597 { 598 probe_periph_init, "probe", 599 TAILQ_HEAD_INITIALIZER(probe_driver.units) 600 }; 601 602 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 603 PERIPHDRIVER_DECLARE(probe, probe_driver); 604 605 #define XPT_CDEV_MAJOR 104 606 607 static d_open_t xptopen; 608 static d_close_t xptclose; 609 static d_ioctl_t xptioctl; 610 611 static struct dev_ops xpt_ops = { 612 { "xpt", XPT_CDEV_MAJOR, 0 }, 613 .d_open = xptopen, 614 .d_close = xptclose, 615 .d_ioctl = xptioctl 616 }; 617 618 static struct intr_config_hook *xpt_config_hook; 619 620 /* Registered busses */ 621 static TAILQ_HEAD(,cam_eb) xpt_busses; 622 static u_int bus_generation; 623 624 /* Storage for debugging datastructures */ 625 #ifdef CAMDEBUG 626 struct cam_path *cam_dpath; 627 u_int32_t cam_dflags; 628 u_int32_t cam_debug_delay; 629 #endif 630 631 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 632 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 633 #endif 634 635 /* 636 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 637 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 638 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 639 */ 640 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 641 || defined(CAM_DEBUG_LUN) 642 #ifdef CAMDEBUG 643 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 644 || !defined(CAM_DEBUG_LUN) 645 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 646 and CAM_DEBUG_LUN" 647 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 648 #else /* !CAMDEBUG */ 649 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 650 #endif /* CAMDEBUG */ 651 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 652 653 /* Our boot-time initialization hook */ 654 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 655 656 static moduledata_t cam_moduledata = { 657 "cam", 658 cam_module_event_handler, 659 NULL 660 }; 661 662 static void xpt_init(void *); 663 664 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 665 MODULE_VERSION(cam, 1); 666 667 668 static cam_status xpt_compile_path(struct cam_path *new_path, 669 struct cam_periph *perph, 670 path_id_t path_id, 671 target_id_t target_id, 672 lun_id_t lun_id); 673 674 static void xpt_release_path(struct cam_path *path); 675 676 static void xpt_async_bcast(struct async_list *async_head, 677 u_int32_t async_code, 678 struct cam_path *path, 679 void *async_arg); 680 static void xpt_dev_async(u_int32_t async_code, 681 struct cam_eb *bus, 682 struct cam_et *target, 683 struct cam_ed *device, 684 void *async_arg); 685 static path_id_t xptnextfreepathid(void); 686 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 687 static union ccb *xpt_get_ccb(struct cam_ed *device); 688 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 689 u_int32_t new_priority); 690 static void xpt_run_dev_allocq(struct cam_eb *bus); 691 static void xpt_run_dev_sendq(struct cam_eb *bus); 692 static timeout_t xpt_release_devq_timeout; 693 static void xpt_release_bus(struct cam_eb *bus); 694 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 695 int run_queue); 696 static struct cam_et* 697 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 698 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 699 static struct cam_ed* 700 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 701 lun_id_t lun_id); 702 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 703 struct cam_ed *device); 704 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 705 static struct cam_eb* 706 xpt_find_bus(path_id_t path_id); 707 static struct cam_et* 708 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 709 static struct cam_ed* 710 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 711 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 712 static void xpt_scan_lun(struct cam_periph *periph, 713 struct cam_path *path, cam_flags flags, 714 union ccb *ccb); 715 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 716 static xpt_busfunc_t xptconfigbuscountfunc; 717 static xpt_busfunc_t xptconfigfunc; 718 static void xpt_config(void *arg); 719 static xpt_devicefunc_t xptpassannouncefunc; 720 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 721 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 722 static void xptpoll(struct cam_sim *sim); 723 static inthand2_t swi_camnet; 724 static inthand2_t swi_cambio; 725 static void camisr(cam_isrq_t *queue); 726 #if 0 727 static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 728 static void xptasync(struct cam_periph *periph, 729 u_int32_t code, cam_path *path); 730 #endif 731 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 732 u_int num_patterns, struct cam_eb *bus); 733 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 734 u_int num_patterns, 735 struct cam_ed *device); 736 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 737 u_int num_patterns, 738 struct cam_periph *periph); 739 static xpt_busfunc_t xptedtbusfunc; 740 static xpt_targetfunc_t xptedttargetfunc; 741 static xpt_devicefunc_t xptedtdevicefunc; 742 static xpt_periphfunc_t xptedtperiphfunc; 743 static xpt_pdrvfunc_t xptplistpdrvfunc; 744 static xpt_periphfunc_t xptplistperiphfunc; 745 static int xptedtmatch(struct ccb_dev_match *cdm); 746 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 747 static int xptbustraverse(struct cam_eb *start_bus, 748 xpt_busfunc_t *tr_func, void *arg); 749 static int xpttargettraverse(struct cam_eb *bus, 750 struct cam_et *start_target, 751 xpt_targetfunc_t *tr_func, void *arg); 752 static int xptdevicetraverse(struct cam_et *target, 753 struct cam_ed *start_device, 754 xpt_devicefunc_t *tr_func, void *arg); 755 static int xptperiphtraverse(struct cam_ed *device, 756 struct cam_periph *start_periph, 757 xpt_periphfunc_t *tr_func, void *arg); 758 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 759 xpt_pdrvfunc_t *tr_func, void *arg); 760 static int xptpdperiphtraverse(struct periph_driver **pdrv, 761 struct cam_periph *start_periph, 762 xpt_periphfunc_t *tr_func, 763 void *arg); 764 static xpt_busfunc_t xptdefbusfunc; 765 static xpt_targetfunc_t xptdeftargetfunc; 766 static xpt_devicefunc_t xptdefdevicefunc; 767 static xpt_periphfunc_t xptdefperiphfunc; 768 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 769 #ifdef notusedyet 770 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 771 void *arg); 772 #endif 773 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 774 void *arg); 775 #ifdef notusedyet 776 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 777 void *arg); 778 #endif 779 static xpt_devicefunc_t xptsetasyncfunc; 780 static xpt_busfunc_t xptsetasyncbusfunc; 781 static cam_status xptregister(struct cam_periph *periph, 782 void *arg); 783 static cam_status proberegister(struct cam_periph *periph, 784 void *arg); 785 static void probeschedule(struct cam_periph *probe_periph); 786 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 787 static void proberequestdefaultnegotiation(struct cam_periph *periph); 788 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 789 static void probecleanup(struct cam_periph *periph); 790 static void xpt_find_quirk(struct cam_ed *device); 791 #ifdef CAM_NEW_TRAN_CODE 792 static void xpt_devise_transport(struct cam_path *path); 793 #endif /* CAM_NEW_TRAN_CODE */ 794 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 795 struct cam_ed *device, 796 int async_update); 797 static void xpt_toggle_tags(struct cam_path *path); 798 static void xpt_start_tags(struct cam_path *path); 799 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 800 struct cam_ed *dev); 801 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 802 struct cam_ed *dev); 803 static __inline int periph_is_queued(struct cam_periph *periph); 804 static __inline int device_is_alloc_queued(struct cam_ed *device); 805 static __inline int device_is_send_queued(struct cam_ed *device); 806 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 807 808 static __inline int 809 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 810 { 811 int retval; 812 813 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 814 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 815 cam_ccbq_resize(&dev->ccbq, 816 dev->ccbq.dev_openings 817 + dev->ccbq.dev_active); 818 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 819 } 820 /* 821 * The priority of a device waiting for CCB resources 822 * is that of the the highest priority peripheral driver 823 * enqueued. 824 */ 825 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 826 &dev->alloc_ccb_entry.pinfo, 827 CAMQ_GET_HEAD(&dev->drvq)->priority); 828 } else { 829 retval = 0; 830 } 831 832 return (retval); 833 } 834 835 static __inline int 836 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 837 { 838 int retval; 839 840 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 841 /* 842 * The priority of a device waiting for controller 843 * resources is that of the the highest priority CCB 844 * enqueued. 845 */ 846 retval = 847 xpt_schedule_dev(&bus->sim->devq->send_queue, 848 &dev->send_ccb_entry.pinfo, 849 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 850 } else { 851 retval = 0; 852 } 853 return (retval); 854 } 855 856 static __inline int 857 periph_is_queued(struct cam_periph *periph) 858 { 859 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 860 } 861 862 static __inline int 863 device_is_alloc_queued(struct cam_ed *device) 864 { 865 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 866 } 867 868 static __inline int 869 device_is_send_queued(struct cam_ed *device) 870 { 871 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 872 } 873 874 static __inline int 875 dev_allocq_is_runnable(struct cam_devq *devq) 876 { 877 /* 878 * Have work to do. 879 * Have space to do more work. 880 * Allowed to do work. 881 */ 882 return ((devq->alloc_queue.qfrozen_cnt == 0) 883 && (devq->alloc_queue.entries > 0) 884 && (devq->alloc_openings > 0)); 885 } 886 887 static void 888 xpt_periph_init(void) 889 { 890 dev_ops_add(&xpt_ops, 0, 0); 891 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 892 } 893 894 static void 895 probe_periph_init(void) 896 { 897 } 898 899 900 static void 901 xptdone(struct cam_periph *periph, union ccb *done_ccb) 902 { 903 /* Caller will release the CCB */ 904 wakeup(&done_ccb->ccb_h.cbfcnp); 905 } 906 907 static int 908 xptopen(struct dev_open_args *ap) 909 { 910 cdev_t dev = ap->a_head.a_dev; 911 int unit; 912 913 unit = minor(dev) & 0xff; 914 915 /* 916 * Only allow read-write access. 917 */ 918 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) 919 return(EPERM); 920 921 /* 922 * We don't allow nonblocking access. 923 */ 924 if ((ap->a_oflags & O_NONBLOCK) != 0) { 925 kprintf("xpt%d: can't do nonblocking access\n", unit); 926 return(ENODEV); 927 } 928 929 /* 930 * We only have one transport layer right now. If someone accesses 931 * us via something other than minor number 1, point out their 932 * mistake. 933 */ 934 if (unit != 0) { 935 kprintf("xptopen: got invalid xpt unit %d\n", unit); 936 return(ENXIO); 937 } 938 939 /* Mark ourselves open */ 940 xsoftc.flags |= XPT_FLAG_OPEN; 941 942 return(0); 943 } 944 945 static int 946 xptclose(struct dev_close_args *ap) 947 { 948 cdev_t dev = ap->a_head.a_dev; 949 int unit; 950 951 unit = minor(dev) & 0xff; 952 953 /* 954 * We only have one transport layer right now. If someone accesses 955 * us via something other than minor number 1, point out their 956 * mistake. 957 */ 958 if (unit != 0) { 959 kprintf("xptclose: got invalid xpt unit %d\n", unit); 960 return(ENXIO); 961 } 962 963 /* Mark ourselves closed */ 964 xsoftc.flags &= ~XPT_FLAG_OPEN; 965 966 return(0); 967 } 968 969 static int 970 xptioctl(struct dev_ioctl_args *ap) 971 { 972 cdev_t dev = ap->a_head.a_dev; 973 int unit, error; 974 975 error = 0; 976 unit = minor(dev) & 0xff; 977 978 /* 979 * We only have one transport layer right now. If someone accesses 980 * us via something other than minor number 1, point out their 981 * mistake. 982 */ 983 if (unit != 0) { 984 kprintf("xptioctl: got invalid xpt unit %d\n", unit); 985 return(ENXIO); 986 } 987 988 switch(ap->a_cmd) { 989 /* 990 * For the transport layer CAMIOCOMMAND ioctl, we really only want 991 * to accept CCB types that don't quite make sense to send through a 992 * passthrough driver. 993 */ 994 case CAMIOCOMMAND: { 995 union ccb *ccb; 996 union ccb *inccb; 997 998 inccb = (union ccb *)ap->a_data; 999 1000 switch(inccb->ccb_h.func_code) { 1001 case XPT_SCAN_BUS: 1002 case XPT_RESET_BUS: 1003 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 1004 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 1005 error = EINVAL; 1006 break; 1007 } 1008 /* FALLTHROUGH */ 1009 case XPT_PATH_INQ: 1010 case XPT_ENG_INQ: 1011 case XPT_SCAN_LUN: 1012 1013 ccb = xpt_alloc_ccb(); 1014 1015 /* 1016 * Create a path using the bus, target, and lun the 1017 * user passed in. 1018 */ 1019 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1020 inccb->ccb_h.path_id, 1021 inccb->ccb_h.target_id, 1022 inccb->ccb_h.target_lun) != 1023 CAM_REQ_CMP){ 1024 error = EINVAL; 1025 xpt_free_ccb(ccb); 1026 break; 1027 } 1028 /* Ensure all of our fields are correct */ 1029 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1030 inccb->ccb_h.pinfo.priority); 1031 xpt_merge_ccb(ccb, inccb); 1032 ccb->ccb_h.cbfcnp = xptdone; 1033 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1034 bcopy(ccb, inccb, sizeof(union ccb)); 1035 xpt_free_path(ccb->ccb_h.path); 1036 xpt_free_ccb(ccb); 1037 break; 1038 1039 case XPT_DEBUG: { 1040 union ccb ccb; 1041 1042 /* 1043 * This is an immediate CCB, so it's okay to 1044 * allocate it on the stack. 1045 */ 1046 1047 /* 1048 * Create a path using the bus, target, and lun the 1049 * user passed in. 1050 */ 1051 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1052 inccb->ccb_h.path_id, 1053 inccb->ccb_h.target_id, 1054 inccb->ccb_h.target_lun) != 1055 CAM_REQ_CMP){ 1056 error = EINVAL; 1057 break; 1058 } 1059 /* Ensure all of our fields are correct */ 1060 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1061 inccb->ccb_h.pinfo.priority); 1062 xpt_merge_ccb(&ccb, inccb); 1063 ccb.ccb_h.cbfcnp = xptdone; 1064 xpt_action(&ccb); 1065 bcopy(&ccb, inccb, sizeof(union ccb)); 1066 xpt_free_path(ccb.ccb_h.path); 1067 break; 1068 1069 } 1070 case XPT_DEV_MATCH: { 1071 struct cam_periph_map_info mapinfo; 1072 struct cam_path *old_path; 1073 1074 /* 1075 * We can't deal with physical addresses for this 1076 * type of transaction. 1077 */ 1078 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1079 error = EINVAL; 1080 break; 1081 } 1082 1083 /* 1084 * Save this in case the caller had it set to 1085 * something in particular. 1086 */ 1087 old_path = inccb->ccb_h.path; 1088 1089 /* 1090 * We really don't need a path for the matching 1091 * code. The path is needed because of the 1092 * debugging statements in xpt_action(). They 1093 * assume that the CCB has a valid path. 1094 */ 1095 inccb->ccb_h.path = xpt_periph->path; 1096 1097 bzero(&mapinfo, sizeof(mapinfo)); 1098 1099 /* 1100 * Map the pattern and match buffers into kernel 1101 * virtual address space. 1102 */ 1103 error = cam_periph_mapmem(inccb, &mapinfo); 1104 1105 if (error) { 1106 inccb->ccb_h.path = old_path; 1107 break; 1108 } 1109 1110 /* 1111 * This is an immediate CCB, we can send it on directly. 1112 */ 1113 xpt_action(inccb); 1114 1115 /* 1116 * Map the buffers back into user space. 1117 */ 1118 cam_periph_unmapmem(inccb, &mapinfo); 1119 1120 inccb->ccb_h.path = old_path; 1121 1122 error = 0; 1123 break; 1124 } 1125 default: 1126 error = ENOTSUP; 1127 break; 1128 } 1129 break; 1130 } 1131 /* 1132 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1133 * with the periphal driver name and unit name filled in. The other 1134 * fields don't really matter as input. The passthrough driver name 1135 * ("pass"), and unit number are passed back in the ccb. The current 1136 * device generation number, and the index into the device peripheral 1137 * driver list, and the status are also passed back. Note that 1138 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1139 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1140 * (or rather should be) impossible for the device peripheral driver 1141 * list to change since we look at the whole thing in one pass, and 1142 * we do it within a critical section. 1143 * 1144 */ 1145 case CAMGETPASSTHRU: { 1146 union ccb *ccb; 1147 struct cam_periph *periph; 1148 struct periph_driver **p_drv; 1149 char *name; 1150 u_int unit; 1151 u_int cur_generation; 1152 int base_periph_found; 1153 int splbreaknum; 1154 1155 ccb = (union ccb *)ap->a_data; 1156 unit = ccb->cgdl.unit_number; 1157 name = ccb->cgdl.periph_name; 1158 /* 1159 * Every 100 devices, we want to call splz() to check for 1160 * and allow the software interrupt handler a chance to run. 1161 * 1162 * Most systems won't run into this check, but this should 1163 * avoid starvation in the software interrupt handler in 1164 * large systems. 1165 */ 1166 splbreaknum = 100; 1167 1168 ccb = (union ccb *)ap->a_data; 1169 1170 base_periph_found = 0; 1171 1172 /* 1173 * Sanity check -- make sure we don't get a null peripheral 1174 * driver name. 1175 */ 1176 if (*ccb->cgdl.periph_name == '\0') { 1177 error = EINVAL; 1178 break; 1179 } 1180 1181 /* Keep the list from changing while we traverse it */ 1182 crit_enter(); 1183 ptstartover: 1184 cur_generation = xsoftc.generation; 1185 1186 /* first find our driver in the list of drivers */ 1187 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 1188 if (strcmp((*p_drv)->driver_name, name) == 0) 1189 break; 1190 } 1191 1192 if (*p_drv == NULL) { 1193 crit_exit(); 1194 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1195 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1196 *ccb->cgdl.periph_name = '\0'; 1197 ccb->cgdl.unit_number = 0; 1198 error = ENOENT; 1199 break; 1200 } 1201 1202 /* 1203 * Run through every peripheral instance of this driver 1204 * and check to see whether it matches the unit passed 1205 * in by the user. If it does, get out of the loops and 1206 * find the passthrough driver associated with that 1207 * peripheral driver. 1208 */ 1209 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 1210 1211 if (periph->unit_number == unit) { 1212 break; 1213 } else if (--splbreaknum == 0) { 1214 splz(); 1215 splbreaknum = 100; 1216 if (cur_generation != xsoftc.generation) 1217 goto ptstartover; 1218 } 1219 } 1220 /* 1221 * If we found the peripheral driver that the user passed 1222 * in, go through all of the peripheral drivers for that 1223 * particular device and look for a passthrough driver. 1224 */ 1225 if (periph != NULL) { 1226 struct cam_ed *device; 1227 int i; 1228 1229 base_periph_found = 1; 1230 device = periph->path->device; 1231 for (i = 0, periph = SLIST_FIRST(&device->periphs); 1232 periph != NULL; 1233 periph = SLIST_NEXT(periph, periph_links), i++) { 1234 /* 1235 * Check to see whether we have a 1236 * passthrough device or not. 1237 */ 1238 if (strcmp(periph->periph_name, "pass") == 0) { 1239 /* 1240 * Fill in the getdevlist fields. 1241 */ 1242 strcpy(ccb->cgdl.periph_name, 1243 periph->periph_name); 1244 ccb->cgdl.unit_number = 1245 periph->unit_number; 1246 if (SLIST_NEXT(periph, periph_links)) 1247 ccb->cgdl.status = 1248 CAM_GDEVLIST_MORE_DEVS; 1249 else 1250 ccb->cgdl.status = 1251 CAM_GDEVLIST_LAST_DEVICE; 1252 ccb->cgdl.generation = 1253 device->generation; 1254 ccb->cgdl.index = i; 1255 /* 1256 * Fill in some CCB header fields 1257 * that the user may want. 1258 */ 1259 ccb->ccb_h.path_id = 1260 periph->path->bus->path_id; 1261 ccb->ccb_h.target_id = 1262 periph->path->target->target_id; 1263 ccb->ccb_h.target_lun = 1264 periph->path->device->lun_id; 1265 ccb->ccb_h.status = CAM_REQ_CMP; 1266 break; 1267 } 1268 } 1269 } 1270 1271 /* 1272 * If the periph is null here, one of two things has 1273 * happened. The first possibility is that we couldn't 1274 * find the unit number of the particular peripheral driver 1275 * that the user is asking about. e.g. the user asks for 1276 * the passthrough driver for "da11". We find the list of 1277 * "da" peripherals all right, but there is no unit 11. 1278 * The other possibility is that we went through the list 1279 * of peripheral drivers attached to the device structure, 1280 * but didn't find one with the name "pass". Either way, 1281 * we return ENOENT, since we couldn't find something. 1282 */ 1283 if (periph == NULL) { 1284 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1285 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1286 *ccb->cgdl.periph_name = '\0'; 1287 ccb->cgdl.unit_number = 0; 1288 error = ENOENT; 1289 /* 1290 * It is unfortunate that this is even necessary, 1291 * but there are many, many clueless users out there. 1292 * If this is true, the user is looking for the 1293 * passthrough driver, but doesn't have one in his 1294 * kernel. 1295 */ 1296 if (base_periph_found == 1) { 1297 kprintf("xptioctl: pass driver is not in the " 1298 "kernel\n"); 1299 kprintf("xptioctl: put \"device pass0\" in " 1300 "your kernel config file\n"); 1301 } 1302 } 1303 crit_exit(); 1304 break; 1305 } 1306 default: 1307 error = ENOTTY; 1308 break; 1309 } 1310 1311 return(error); 1312 } 1313 1314 static int 1315 cam_module_event_handler(module_t mod, int what, void *arg) 1316 { 1317 if (what == MOD_LOAD) { 1318 xpt_init(NULL); 1319 } else if (what == MOD_UNLOAD) { 1320 return EBUSY; 1321 } 1322 1323 return 0; 1324 } 1325 1326 /* Functions accessed by the peripheral drivers */ 1327 static void 1328 xpt_init(void *dummy) 1329 { 1330 struct cam_sim *xpt_sim; 1331 struct cam_path *path; 1332 struct cam_devq *devq; 1333 cam_status status; 1334 1335 TAILQ_INIT(&xpt_busses); 1336 TAILQ_INIT(&cam_bioq); 1337 TAILQ_INIT(&cam_netq); 1338 SLIST_INIT(&ccb_freeq); 1339 STAILQ_INIT(&highpowerq); 1340 1341 /* 1342 * The xpt layer is, itself, the equivelent of a SIM. 1343 * Allow 16 ccbs in the ccb pool for it. This should 1344 * give decent parallelism when we probe busses and 1345 * perform other XPT functions. 1346 */ 1347 devq = cam_simq_alloc(16); 1348 xpt_sim = cam_sim_alloc(xptaction, 1349 xptpoll, 1350 "xpt", 1351 /*softc*/NULL, 1352 /*unit*/0, 1353 /*max_dev_transactions*/0, 1354 /*max_tagged_dev_transactions*/0, 1355 devq); 1356 cam_simq_release(devq); 1357 xpt_max_ccbs = 16; 1358 1359 xpt_bus_register(xpt_sim, /*bus #*/0); 1360 1361 /* 1362 * Looking at the XPT from the SIM layer, the XPT is 1363 * the equivelent of a peripheral driver. Allocate 1364 * a peripheral driver entry for us. 1365 */ 1366 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1367 CAM_TARGET_WILDCARD, 1368 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1369 kprintf("xpt_init: xpt_create_path failed with status %#x," 1370 " failing attach\n", status); 1371 return; 1372 } 1373 1374 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1375 path, NULL, 0, NULL); 1376 xpt_free_path(path); 1377 1378 xpt_sim->softc = xpt_periph; 1379 1380 /* 1381 * Register a callback for when interrupts are enabled. 1382 */ 1383 xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1384 M_TEMP, M_INTWAIT | M_ZERO); 1385 xpt_config_hook->ich_func = xpt_config; 1386 xpt_config_hook->ich_desc = "xpt"; 1387 xpt_config_hook->ich_order = 1000; 1388 if (config_intrhook_establish(xpt_config_hook) != 0) { 1389 kfree (xpt_config_hook, M_TEMP); 1390 kprintf("xpt_init: config_intrhook_establish failed " 1391 "- failing attach\n"); 1392 } 1393 1394 /* Install our software interrupt handlers */ 1395 register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet", NULL); 1396 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL); 1397 } 1398 1399 static cam_status 1400 xptregister(struct cam_periph *periph, void *arg) 1401 { 1402 if (periph == NULL) { 1403 kprintf("xptregister: periph was NULL!!\n"); 1404 return(CAM_REQ_CMP_ERR); 1405 } 1406 1407 periph->softc = NULL; 1408 1409 xpt_periph = periph; 1410 1411 return(CAM_REQ_CMP); 1412 } 1413 1414 int32_t 1415 xpt_add_periph(struct cam_periph *periph) 1416 { 1417 struct cam_ed *device; 1418 int32_t status; 1419 struct periph_list *periph_head; 1420 1421 device = periph->path->device; 1422 1423 periph_head = &device->periphs; 1424 1425 status = CAM_REQ_CMP; 1426 1427 if (device != NULL) { 1428 /* 1429 * Make room for this peripheral 1430 * so it will fit in the queue 1431 * when it's scheduled to run 1432 */ 1433 crit_enter(); 1434 status = camq_resize(&device->drvq, 1435 device->drvq.array_size + 1); 1436 1437 device->generation++; 1438 1439 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1440 crit_exit(); 1441 } 1442 1443 xsoftc.generation++; 1444 1445 return (status); 1446 } 1447 1448 void 1449 xpt_remove_periph(struct cam_periph *periph) 1450 { 1451 struct cam_ed *device; 1452 1453 device = periph->path->device; 1454 1455 if (device != NULL) { 1456 struct periph_list *periph_head; 1457 1458 periph_head = &device->periphs; 1459 1460 /* Release the slot for this peripheral */ 1461 crit_enter(); 1462 camq_resize(&device->drvq, device->drvq.array_size - 1); 1463 1464 device->generation++; 1465 1466 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1467 crit_exit(); 1468 } 1469 1470 xsoftc.generation++; 1471 1472 } 1473 1474 #ifdef CAM_NEW_TRAN_CODE 1475 1476 void 1477 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1478 { 1479 struct ccb_pathinq cpi; 1480 struct ccb_trans_settings cts; 1481 struct cam_path *path; 1482 u_int speed; 1483 u_int freq; 1484 u_int mb; 1485 1486 path = periph->path; 1487 /* 1488 * To ensure that this is printed in one piece, 1489 * mask out CAM interrupts. 1490 */ 1491 crit_enter(); 1492 printf("%s%d at %s%d bus %d target %d lun %d\n", 1493 periph->periph_name, periph->unit_number, 1494 path->bus->sim->sim_name, 1495 path->bus->sim->unit_number, 1496 path->bus->sim->bus_id, 1497 path->target->target_id, 1498 path->device->lun_id); 1499 printf("%s%d: ", periph->periph_name, periph->unit_number); 1500 scsi_print_inquiry(&path->device->inq_data); 1501 if (bootverbose && path->device->serial_num_len > 0) { 1502 /* Don't wrap the screen - print only the first 60 chars */ 1503 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1504 periph->unit_number, path->device->serial_num); 1505 } 1506 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1507 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1508 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1509 xpt_action((union ccb*)&cts); 1510 1511 /* Ask the SIM for its base transfer speed */ 1512 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1513 cpi.ccb_h.func_code = XPT_PATH_INQ; 1514 xpt_action((union ccb *)&cpi); 1515 1516 speed = cpi.base_transfer_speed; 1517 freq = 0; 1518 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1519 struct ccb_trans_settings_spi *spi; 1520 1521 spi = &cts.xport_specific.spi; 1522 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1523 && spi->sync_offset != 0) { 1524 freq = scsi_calc_syncsrate(spi->sync_period); 1525 speed = freq; 1526 } 1527 1528 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1529 speed *= (0x01 << spi->bus_width); 1530 } 1531 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1532 struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; 1533 if (fc->valid & CTS_FC_VALID_SPEED) { 1534 speed = fc->bitrate; 1535 } 1536 } 1537 1538 mb = speed / 1000; 1539 if (mb > 0) 1540 printf("%s%d: %d.%03dMB/s transfers", 1541 periph->periph_name, periph->unit_number, 1542 mb, speed % 1000); 1543 else 1544 printf("%s%d: %dKB/s transfers", periph->periph_name, 1545 periph->unit_number, speed); 1546 /* Report additional information about SPI connections */ 1547 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { 1548 struct ccb_trans_settings_spi *spi; 1549 1550 spi = &cts.xport_specific.spi; 1551 if (freq != 0) { 1552 printf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1553 freq % 1000, 1554 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1555 ? " DT" : "", 1556 spi->sync_offset); 1557 } 1558 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1559 && spi->bus_width > 0) { 1560 if (freq != 0) { 1561 printf(", "); 1562 } else { 1563 printf(" ("); 1564 } 1565 printf("%dbit)", 8 * (0x01 << spi->bus_width)); 1566 } else if (freq != 0) { 1567 printf(")"); 1568 } 1569 } 1570 if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { 1571 struct ccb_trans_settings_fc *fc; 1572 1573 fc = &cts.xport_specific.fc; 1574 if (fc->valid & CTS_FC_VALID_WWNN) 1575 printf(" WWNN 0x%llx", (long long) fc->wwnn); 1576 if (fc->valid & CTS_FC_VALID_WWPN) 1577 printf(" WWPN 0x%llx", (long long) fc->wwpn); 1578 if (fc->valid & CTS_FC_VALID_PORT) 1579 printf(" PortID 0x%x", fc->port); 1580 } 1581 1582 if (path->device->inq_flags & SID_CmdQue 1583 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1584 printf("\n%s%d: Tagged Queueing Enabled", 1585 periph->periph_name, periph->unit_number); 1586 } 1587 printf("\n"); 1588 1589 /* 1590 * We only want to print the caller's announce string if they've 1591 * passed one in.. 1592 */ 1593 if (announce_string != NULL) 1594 printf("%s%d: %s\n", periph->periph_name, 1595 periph->unit_number, announce_string); 1596 crit_exit(); 1597 } 1598 #else /* CAM_NEW_TRAN_CODE */ 1599 void 1600 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1601 { 1602 u_int mb; 1603 struct cam_path *path; 1604 struct ccb_trans_settings cts; 1605 1606 path = periph->path; 1607 /* 1608 * To ensure that this is printed in one piece, 1609 * mask out CAM interrupts. 1610 */ 1611 crit_enter(); 1612 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1613 periph->periph_name, periph->unit_number, 1614 path->bus->sim->sim_name, 1615 path->bus->sim->unit_number, 1616 path->bus->sim->bus_id, 1617 path->target->target_id, 1618 path->device->lun_id); 1619 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1620 scsi_print_inquiry(&path->device->inq_data); 1621 if ((bootverbose) 1622 && (path->device->serial_num_len > 0)) { 1623 /* Don't wrap the screen - print only the first 60 chars */ 1624 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1625 periph->unit_number, path->device->serial_num); 1626 } 1627 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1628 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1629 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1630 xpt_action((union ccb*)&cts); 1631 if (cts.ccb_h.status == CAM_REQ_CMP) { 1632 u_int speed; 1633 u_int freq; 1634 1635 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1636 && cts.sync_offset != 0) { 1637 freq = scsi_calc_syncsrate(cts.sync_period); 1638 speed = freq; 1639 } else { 1640 struct ccb_pathinq cpi; 1641 1642 /* Ask the SIM for its base transfer speed */ 1643 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1644 cpi.ccb_h.func_code = XPT_PATH_INQ; 1645 xpt_action((union ccb *)&cpi); 1646 1647 speed = cpi.base_transfer_speed; 1648 freq = 0; 1649 } 1650 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1651 speed *= (0x01 << cts.bus_width); 1652 mb = speed / 1000; 1653 if (mb > 0) 1654 kprintf("%s%d: %d.%03dMB/s transfers", 1655 periph->periph_name, periph->unit_number, 1656 mb, speed % 1000); 1657 else 1658 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1659 periph->unit_number, speed); 1660 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1661 && cts.sync_offset != 0) { 1662 kprintf(" (%d.%03dMHz, offset %d", freq / 1000, 1663 freq % 1000, cts.sync_offset); 1664 } 1665 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1666 && cts.bus_width > 0) { 1667 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1668 && cts.sync_offset != 0) { 1669 kprintf(", "); 1670 } else { 1671 kprintf(" ("); 1672 } 1673 kprintf("%dbit)", 8 * (0x01 << cts.bus_width)); 1674 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1675 && cts.sync_offset != 0) { 1676 kprintf(")"); 1677 } 1678 1679 if (path->device->inq_flags & SID_CmdQue 1680 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1681 kprintf(", Tagged Queueing Enabled"); 1682 } 1683 1684 kprintf("\n"); 1685 } else if (path->device->inq_flags & SID_CmdQue 1686 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1687 kprintf("%s%d: Tagged Queueing Enabled\n", 1688 periph->periph_name, periph->unit_number); 1689 } 1690 1691 /* 1692 * We only want to print the caller's announce string if they've 1693 * passed one in.. 1694 */ 1695 if (announce_string != NULL) 1696 kprintf("%s%d: %s\n", periph->periph_name, 1697 periph->unit_number, announce_string); 1698 crit_exit(); 1699 } 1700 1701 #endif /* CAM_NEW_TRAN_CODE */ 1702 1703 static dev_match_ret 1704 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1705 struct cam_eb *bus) 1706 { 1707 dev_match_ret retval; 1708 int i; 1709 1710 retval = DM_RET_NONE; 1711 1712 /* 1713 * If we aren't given something to match against, that's an error. 1714 */ 1715 if (bus == NULL) 1716 return(DM_RET_ERROR); 1717 1718 /* 1719 * If there are no match entries, then this bus matches no 1720 * matter what. 1721 */ 1722 if ((patterns == NULL) || (num_patterns == 0)) 1723 return(DM_RET_DESCEND | DM_RET_COPY); 1724 1725 for (i = 0; i < num_patterns; i++) { 1726 struct bus_match_pattern *cur_pattern; 1727 1728 /* 1729 * If the pattern in question isn't for a bus node, we 1730 * aren't interested. However, we do indicate to the 1731 * calling routine that we should continue descending the 1732 * tree, since the user wants to match against lower-level 1733 * EDT elements. 1734 */ 1735 if (patterns[i].type != DEV_MATCH_BUS) { 1736 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1737 retval |= DM_RET_DESCEND; 1738 continue; 1739 } 1740 1741 cur_pattern = &patterns[i].pattern.bus_pattern; 1742 1743 /* 1744 * If they want to match any bus node, we give them any 1745 * device node. 1746 */ 1747 if (cur_pattern->flags == BUS_MATCH_ANY) { 1748 /* set the copy flag */ 1749 retval |= DM_RET_COPY; 1750 1751 /* 1752 * If we've already decided on an action, go ahead 1753 * and return. 1754 */ 1755 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1756 return(retval); 1757 } 1758 1759 /* 1760 * Not sure why someone would do this... 1761 */ 1762 if (cur_pattern->flags == BUS_MATCH_NONE) 1763 continue; 1764 1765 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1766 && (cur_pattern->path_id != bus->path_id)) 1767 continue; 1768 1769 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1770 && (cur_pattern->bus_id != bus->sim->bus_id)) 1771 continue; 1772 1773 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1774 && (cur_pattern->unit_number != bus->sim->unit_number)) 1775 continue; 1776 1777 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1778 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1779 DEV_IDLEN) != 0)) 1780 continue; 1781 1782 /* 1783 * If we get to this point, the user definitely wants 1784 * information on this bus. So tell the caller to copy the 1785 * data out. 1786 */ 1787 retval |= DM_RET_COPY; 1788 1789 /* 1790 * If the return action has been set to descend, then we 1791 * know that we've already seen a non-bus matching 1792 * expression, therefore we need to further descend the tree. 1793 * This won't change by continuing around the loop, so we 1794 * go ahead and return. If we haven't seen a non-bus 1795 * matching expression, we keep going around the loop until 1796 * we exhaust the matching expressions. We'll set the stop 1797 * flag once we fall out of the loop. 1798 */ 1799 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1800 return(retval); 1801 } 1802 1803 /* 1804 * If the return action hasn't been set to descend yet, that means 1805 * we haven't seen anything other than bus matching patterns. So 1806 * tell the caller to stop descending the tree -- the user doesn't 1807 * want to match against lower level tree elements. 1808 */ 1809 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1810 retval |= DM_RET_STOP; 1811 1812 return(retval); 1813 } 1814 1815 static dev_match_ret 1816 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1817 struct cam_ed *device) 1818 { 1819 dev_match_ret retval; 1820 int i; 1821 1822 retval = DM_RET_NONE; 1823 1824 /* 1825 * If we aren't given something to match against, that's an error. 1826 */ 1827 if (device == NULL) 1828 return(DM_RET_ERROR); 1829 1830 /* 1831 * If there are no match entries, then this device matches no 1832 * matter what. 1833 */ 1834 if ((patterns == NULL) || (patterns == 0)) 1835 return(DM_RET_DESCEND | DM_RET_COPY); 1836 1837 for (i = 0; i < num_patterns; i++) { 1838 struct device_match_pattern *cur_pattern; 1839 1840 /* 1841 * If the pattern in question isn't for a device node, we 1842 * aren't interested. 1843 */ 1844 if (patterns[i].type != DEV_MATCH_DEVICE) { 1845 if ((patterns[i].type == DEV_MATCH_PERIPH) 1846 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1847 retval |= DM_RET_DESCEND; 1848 continue; 1849 } 1850 1851 cur_pattern = &patterns[i].pattern.device_pattern; 1852 1853 /* 1854 * If they want to match any device node, we give them any 1855 * device node. 1856 */ 1857 if (cur_pattern->flags == DEV_MATCH_ANY) { 1858 /* set the copy flag */ 1859 retval |= DM_RET_COPY; 1860 1861 1862 /* 1863 * If we've already decided on an action, go ahead 1864 * and return. 1865 */ 1866 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1867 return(retval); 1868 } 1869 1870 /* 1871 * Not sure why someone would do this... 1872 */ 1873 if (cur_pattern->flags == DEV_MATCH_NONE) 1874 continue; 1875 1876 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1877 && (cur_pattern->path_id != device->target->bus->path_id)) 1878 continue; 1879 1880 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1881 && (cur_pattern->target_id != device->target->target_id)) 1882 continue; 1883 1884 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1885 && (cur_pattern->target_lun != device->lun_id)) 1886 continue; 1887 1888 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1889 && (cam_quirkmatch((caddr_t)&device->inq_data, 1890 (caddr_t)&cur_pattern->inq_pat, 1891 1, sizeof(cur_pattern->inq_pat), 1892 scsi_static_inquiry_match) == NULL)) 1893 continue; 1894 1895 /* 1896 * If we get to this point, the user definitely wants 1897 * information on this device. So tell the caller to copy 1898 * the data out. 1899 */ 1900 retval |= DM_RET_COPY; 1901 1902 /* 1903 * If the return action has been set to descend, then we 1904 * know that we've already seen a peripheral matching 1905 * expression, therefore we need to further descend the tree. 1906 * This won't change by continuing around the loop, so we 1907 * go ahead and return. If we haven't seen a peripheral 1908 * matching expression, we keep going around the loop until 1909 * we exhaust the matching expressions. We'll set the stop 1910 * flag once we fall out of the loop. 1911 */ 1912 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1913 return(retval); 1914 } 1915 1916 /* 1917 * If the return action hasn't been set to descend yet, that means 1918 * we haven't seen any peripheral matching patterns. So tell the 1919 * caller to stop descending the tree -- the user doesn't want to 1920 * match against lower level tree elements. 1921 */ 1922 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1923 retval |= DM_RET_STOP; 1924 1925 return(retval); 1926 } 1927 1928 /* 1929 * Match a single peripheral against any number of match patterns. 1930 */ 1931 static dev_match_ret 1932 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1933 struct cam_periph *periph) 1934 { 1935 dev_match_ret retval; 1936 int i; 1937 1938 /* 1939 * If we aren't given something to match against, that's an error. 1940 */ 1941 if (periph == NULL) 1942 return(DM_RET_ERROR); 1943 1944 /* 1945 * If there are no match entries, then this peripheral matches no 1946 * matter what. 1947 */ 1948 if ((patterns == NULL) || (num_patterns == 0)) 1949 return(DM_RET_STOP | DM_RET_COPY); 1950 1951 /* 1952 * There aren't any nodes below a peripheral node, so there's no 1953 * reason to descend the tree any further. 1954 */ 1955 retval = DM_RET_STOP; 1956 1957 for (i = 0; i < num_patterns; i++) { 1958 struct periph_match_pattern *cur_pattern; 1959 1960 /* 1961 * If the pattern in question isn't for a peripheral, we 1962 * aren't interested. 1963 */ 1964 if (patterns[i].type != DEV_MATCH_PERIPH) 1965 continue; 1966 1967 cur_pattern = &patterns[i].pattern.periph_pattern; 1968 1969 /* 1970 * If they want to match on anything, then we will do so. 1971 */ 1972 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1973 /* set the copy flag */ 1974 retval |= DM_RET_COPY; 1975 1976 /* 1977 * We've already set the return action to stop, 1978 * since there are no nodes below peripherals in 1979 * the tree. 1980 */ 1981 return(retval); 1982 } 1983 1984 /* 1985 * Not sure why someone would do this... 1986 */ 1987 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1988 continue; 1989 1990 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1991 && (cur_pattern->path_id != periph->path->bus->path_id)) 1992 continue; 1993 1994 /* 1995 * For the target and lun id's, we have to make sure the 1996 * target and lun pointers aren't NULL. The xpt peripheral 1997 * has a wildcard target and device. 1998 */ 1999 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 2000 && ((periph->path->target == NULL) 2001 ||(cur_pattern->target_id != periph->path->target->target_id))) 2002 continue; 2003 2004 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 2005 && ((periph->path->device == NULL) 2006 || (cur_pattern->target_lun != periph->path->device->lun_id))) 2007 continue; 2008 2009 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 2010 && (cur_pattern->unit_number != periph->unit_number)) 2011 continue; 2012 2013 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 2014 && (strncmp(cur_pattern->periph_name, periph->periph_name, 2015 DEV_IDLEN) != 0)) 2016 continue; 2017 2018 /* 2019 * If we get to this point, the user definitely wants 2020 * information on this peripheral. So tell the caller to 2021 * copy the data out. 2022 */ 2023 retval |= DM_RET_COPY; 2024 2025 /* 2026 * The return action has already been set to stop, since 2027 * peripherals don't have any nodes below them in the EDT. 2028 */ 2029 return(retval); 2030 } 2031 2032 /* 2033 * If we get to this point, the peripheral that was passed in 2034 * doesn't match any of the patterns. 2035 */ 2036 return(retval); 2037 } 2038 2039 static int 2040 xptedtbusfunc(struct cam_eb *bus, void *arg) 2041 { 2042 struct ccb_dev_match *cdm; 2043 dev_match_ret retval; 2044 2045 cdm = (struct ccb_dev_match *)arg; 2046 2047 /* 2048 * If our position is for something deeper in the tree, that means 2049 * that we've already seen this node. So, we keep going down. 2050 */ 2051 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2052 && (cdm->pos.cookie.bus == bus) 2053 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2054 && (cdm->pos.cookie.target != NULL)) 2055 retval = DM_RET_DESCEND; 2056 else 2057 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 2058 2059 /* 2060 * If we got an error, bail out of the search. 2061 */ 2062 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2063 cdm->status = CAM_DEV_MATCH_ERROR; 2064 return(0); 2065 } 2066 2067 /* 2068 * If the copy flag is set, copy this bus out. 2069 */ 2070 if (retval & DM_RET_COPY) { 2071 int spaceleft, j; 2072 2073 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2074 sizeof(struct dev_match_result)); 2075 2076 /* 2077 * If we don't have enough space to put in another 2078 * match result, save our position and tell the 2079 * user there are more devices to check. 2080 */ 2081 if (spaceleft < sizeof(struct dev_match_result)) { 2082 bzero(&cdm->pos, sizeof(cdm->pos)); 2083 cdm->pos.position_type = 2084 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 2085 2086 cdm->pos.cookie.bus = bus; 2087 cdm->pos.generations[CAM_BUS_GENERATION]= 2088 bus_generation; 2089 cdm->status = CAM_DEV_MATCH_MORE; 2090 return(0); 2091 } 2092 j = cdm->num_matches; 2093 cdm->num_matches++; 2094 cdm->matches[j].type = DEV_MATCH_BUS; 2095 cdm->matches[j].result.bus_result.path_id = bus->path_id; 2096 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 2097 cdm->matches[j].result.bus_result.unit_number = 2098 bus->sim->unit_number; 2099 strncpy(cdm->matches[j].result.bus_result.dev_name, 2100 bus->sim->sim_name, DEV_IDLEN); 2101 } 2102 2103 /* 2104 * If the user is only interested in busses, there's no 2105 * reason to descend to the next level in the tree. 2106 */ 2107 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2108 return(1); 2109 2110 /* 2111 * If there is a target generation recorded, check it to 2112 * make sure the target list hasn't changed. 2113 */ 2114 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2115 && (bus == cdm->pos.cookie.bus) 2116 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2117 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 2118 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 2119 bus->generation)) { 2120 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2121 return(0); 2122 } 2123 2124 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2125 && (cdm->pos.cookie.bus == bus) 2126 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2127 && (cdm->pos.cookie.target != NULL)) 2128 return(xpttargettraverse(bus, 2129 (struct cam_et *)cdm->pos.cookie.target, 2130 xptedttargetfunc, arg)); 2131 else 2132 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 2133 } 2134 2135 static int 2136 xptedttargetfunc(struct cam_et *target, void *arg) 2137 { 2138 struct ccb_dev_match *cdm; 2139 2140 cdm = (struct ccb_dev_match *)arg; 2141 2142 /* 2143 * If there is a device list generation recorded, check it to 2144 * make sure the device list hasn't changed. 2145 */ 2146 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2147 && (cdm->pos.cookie.bus == target->bus) 2148 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2149 && (cdm->pos.cookie.target == target) 2150 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2151 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2152 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2153 target->generation)) { 2154 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2155 return(0); 2156 } 2157 2158 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2159 && (cdm->pos.cookie.bus == target->bus) 2160 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2161 && (cdm->pos.cookie.target == target) 2162 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2163 && (cdm->pos.cookie.device != NULL)) 2164 return(xptdevicetraverse(target, 2165 (struct cam_ed *)cdm->pos.cookie.device, 2166 xptedtdevicefunc, arg)); 2167 else 2168 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2169 } 2170 2171 static int 2172 xptedtdevicefunc(struct cam_ed *device, void *arg) 2173 { 2174 2175 struct ccb_dev_match *cdm; 2176 dev_match_ret retval; 2177 2178 cdm = (struct ccb_dev_match *)arg; 2179 2180 /* 2181 * If our position is for something deeper in the tree, that means 2182 * that we've already seen this node. So, we keep going down. 2183 */ 2184 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2185 && (cdm->pos.cookie.device == device) 2186 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2187 && (cdm->pos.cookie.periph != NULL)) 2188 retval = DM_RET_DESCEND; 2189 else 2190 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2191 device); 2192 2193 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2194 cdm->status = CAM_DEV_MATCH_ERROR; 2195 return(0); 2196 } 2197 2198 /* 2199 * If the copy flag is set, copy this device out. 2200 */ 2201 if (retval & DM_RET_COPY) { 2202 int spaceleft, j; 2203 2204 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2205 sizeof(struct dev_match_result)); 2206 2207 /* 2208 * If we don't have enough space to put in another 2209 * match result, save our position and tell the 2210 * user there are more devices to check. 2211 */ 2212 if (spaceleft < sizeof(struct dev_match_result)) { 2213 bzero(&cdm->pos, sizeof(cdm->pos)); 2214 cdm->pos.position_type = 2215 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2216 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2217 2218 cdm->pos.cookie.bus = device->target->bus; 2219 cdm->pos.generations[CAM_BUS_GENERATION]= 2220 bus_generation; 2221 cdm->pos.cookie.target = device->target; 2222 cdm->pos.generations[CAM_TARGET_GENERATION] = 2223 device->target->bus->generation; 2224 cdm->pos.cookie.device = device; 2225 cdm->pos.generations[CAM_DEV_GENERATION] = 2226 device->target->generation; 2227 cdm->status = CAM_DEV_MATCH_MORE; 2228 return(0); 2229 } 2230 j = cdm->num_matches; 2231 cdm->num_matches++; 2232 cdm->matches[j].type = DEV_MATCH_DEVICE; 2233 cdm->matches[j].result.device_result.path_id = 2234 device->target->bus->path_id; 2235 cdm->matches[j].result.device_result.target_id = 2236 device->target->target_id; 2237 cdm->matches[j].result.device_result.target_lun = 2238 device->lun_id; 2239 bcopy(&device->inq_data, 2240 &cdm->matches[j].result.device_result.inq_data, 2241 sizeof(struct scsi_inquiry_data)); 2242 2243 /* Let the user know whether this device is unconfigured */ 2244 if (device->flags & CAM_DEV_UNCONFIGURED) 2245 cdm->matches[j].result.device_result.flags = 2246 DEV_RESULT_UNCONFIGURED; 2247 else 2248 cdm->matches[j].result.device_result.flags = 2249 DEV_RESULT_NOFLAG; 2250 } 2251 2252 /* 2253 * If the user isn't interested in peripherals, don't descend 2254 * the tree any further. 2255 */ 2256 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2257 return(1); 2258 2259 /* 2260 * If there is a peripheral list generation recorded, make sure 2261 * it hasn't changed. 2262 */ 2263 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2264 && (device->target->bus == cdm->pos.cookie.bus) 2265 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2266 && (device->target == cdm->pos.cookie.target) 2267 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2268 && (device == cdm->pos.cookie.device) 2269 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2270 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2271 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2272 device->generation)){ 2273 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2274 return(0); 2275 } 2276 2277 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2278 && (cdm->pos.cookie.bus == device->target->bus) 2279 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2280 && (cdm->pos.cookie.target == device->target) 2281 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2282 && (cdm->pos.cookie.device == device) 2283 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2284 && (cdm->pos.cookie.periph != NULL)) 2285 return(xptperiphtraverse(device, 2286 (struct cam_periph *)cdm->pos.cookie.periph, 2287 xptedtperiphfunc, arg)); 2288 else 2289 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2290 } 2291 2292 static int 2293 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2294 { 2295 struct ccb_dev_match *cdm; 2296 dev_match_ret retval; 2297 2298 cdm = (struct ccb_dev_match *)arg; 2299 2300 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2301 2302 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2303 cdm->status = CAM_DEV_MATCH_ERROR; 2304 return(0); 2305 } 2306 2307 /* 2308 * If the copy flag is set, copy this peripheral out. 2309 */ 2310 if (retval & DM_RET_COPY) { 2311 int spaceleft, j; 2312 2313 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2314 sizeof(struct dev_match_result)); 2315 2316 /* 2317 * If we don't have enough space to put in another 2318 * match result, save our position and tell the 2319 * user there are more devices to check. 2320 */ 2321 if (spaceleft < sizeof(struct dev_match_result)) { 2322 bzero(&cdm->pos, sizeof(cdm->pos)); 2323 cdm->pos.position_type = 2324 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2325 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2326 CAM_DEV_POS_PERIPH; 2327 2328 cdm->pos.cookie.bus = periph->path->bus; 2329 cdm->pos.generations[CAM_BUS_GENERATION]= 2330 bus_generation; 2331 cdm->pos.cookie.target = periph->path->target; 2332 cdm->pos.generations[CAM_TARGET_GENERATION] = 2333 periph->path->bus->generation; 2334 cdm->pos.cookie.device = periph->path->device; 2335 cdm->pos.generations[CAM_DEV_GENERATION] = 2336 periph->path->target->generation; 2337 cdm->pos.cookie.periph = periph; 2338 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2339 periph->path->device->generation; 2340 cdm->status = CAM_DEV_MATCH_MORE; 2341 return(0); 2342 } 2343 2344 j = cdm->num_matches; 2345 cdm->num_matches++; 2346 cdm->matches[j].type = DEV_MATCH_PERIPH; 2347 cdm->matches[j].result.periph_result.path_id = 2348 periph->path->bus->path_id; 2349 cdm->matches[j].result.periph_result.target_id = 2350 periph->path->target->target_id; 2351 cdm->matches[j].result.periph_result.target_lun = 2352 periph->path->device->lun_id; 2353 cdm->matches[j].result.periph_result.unit_number = 2354 periph->unit_number; 2355 strncpy(cdm->matches[j].result.periph_result.periph_name, 2356 periph->periph_name, DEV_IDLEN); 2357 } 2358 2359 return(1); 2360 } 2361 2362 static int 2363 xptedtmatch(struct ccb_dev_match *cdm) 2364 { 2365 int ret; 2366 2367 cdm->num_matches = 0; 2368 2369 /* 2370 * Check the bus list generation. If it has changed, the user 2371 * needs to reset everything and start over. 2372 */ 2373 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2374 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2375 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2376 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2377 return(0); 2378 } 2379 2380 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2381 && (cdm->pos.cookie.bus != NULL)) 2382 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2383 xptedtbusfunc, cdm); 2384 else 2385 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2386 2387 /* 2388 * If we get back 0, that means that we had to stop before fully 2389 * traversing the EDT. It also means that one of the subroutines 2390 * has set the status field to the proper value. If we get back 1, 2391 * we've fully traversed the EDT and copied out any matching entries. 2392 */ 2393 if (ret == 1) 2394 cdm->status = CAM_DEV_MATCH_LAST; 2395 2396 return(ret); 2397 } 2398 2399 static int 2400 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2401 { 2402 struct ccb_dev_match *cdm; 2403 2404 cdm = (struct ccb_dev_match *)arg; 2405 2406 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2407 && (cdm->pos.cookie.pdrv == pdrv) 2408 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2409 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2410 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2411 (*pdrv)->generation)) { 2412 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2413 return(0); 2414 } 2415 2416 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2417 && (cdm->pos.cookie.pdrv == pdrv) 2418 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2419 && (cdm->pos.cookie.periph != NULL)) 2420 return(xptpdperiphtraverse(pdrv, 2421 (struct cam_periph *)cdm->pos.cookie.periph, 2422 xptplistperiphfunc, arg)); 2423 else 2424 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2425 } 2426 2427 static int 2428 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2429 { 2430 struct ccb_dev_match *cdm; 2431 dev_match_ret retval; 2432 2433 cdm = (struct ccb_dev_match *)arg; 2434 2435 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2436 2437 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2438 cdm->status = CAM_DEV_MATCH_ERROR; 2439 return(0); 2440 } 2441 2442 /* 2443 * If the copy flag is set, copy this peripheral out. 2444 */ 2445 if (retval & DM_RET_COPY) { 2446 int spaceleft, j; 2447 2448 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2449 sizeof(struct dev_match_result)); 2450 2451 /* 2452 * If we don't have enough space to put in another 2453 * match result, save our position and tell the 2454 * user there are more devices to check. 2455 */ 2456 if (spaceleft < sizeof(struct dev_match_result)) { 2457 struct periph_driver **pdrv; 2458 2459 pdrv = NULL; 2460 bzero(&cdm->pos, sizeof(cdm->pos)); 2461 cdm->pos.position_type = 2462 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2463 CAM_DEV_POS_PERIPH; 2464 2465 /* 2466 * This may look a bit non-sensical, but it is 2467 * actually quite logical. There are very few 2468 * peripheral drivers, and bloating every peripheral 2469 * structure with a pointer back to its parent 2470 * peripheral driver linker set entry would cost 2471 * more in the long run than doing this quick lookup. 2472 */ 2473 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2474 if (strcmp((*pdrv)->driver_name, 2475 periph->periph_name) == 0) 2476 break; 2477 } 2478 2479 if (*pdrv == NULL) { 2480 cdm->status = CAM_DEV_MATCH_ERROR; 2481 return(0); 2482 } 2483 2484 cdm->pos.cookie.pdrv = pdrv; 2485 /* 2486 * The periph generation slot does double duty, as 2487 * does the periph pointer slot. They are used for 2488 * both edt and pdrv lookups and positioning. 2489 */ 2490 cdm->pos.cookie.periph = periph; 2491 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2492 (*pdrv)->generation; 2493 cdm->status = CAM_DEV_MATCH_MORE; 2494 return(0); 2495 } 2496 2497 j = cdm->num_matches; 2498 cdm->num_matches++; 2499 cdm->matches[j].type = DEV_MATCH_PERIPH; 2500 cdm->matches[j].result.periph_result.path_id = 2501 periph->path->bus->path_id; 2502 2503 /* 2504 * The transport layer peripheral doesn't have a target or 2505 * lun. 2506 */ 2507 if (periph->path->target) 2508 cdm->matches[j].result.periph_result.target_id = 2509 periph->path->target->target_id; 2510 else 2511 cdm->matches[j].result.periph_result.target_id = -1; 2512 2513 if (periph->path->device) 2514 cdm->matches[j].result.periph_result.target_lun = 2515 periph->path->device->lun_id; 2516 else 2517 cdm->matches[j].result.periph_result.target_lun = -1; 2518 2519 cdm->matches[j].result.periph_result.unit_number = 2520 periph->unit_number; 2521 strncpy(cdm->matches[j].result.periph_result.periph_name, 2522 periph->periph_name, DEV_IDLEN); 2523 } 2524 2525 return(1); 2526 } 2527 2528 static int 2529 xptperiphlistmatch(struct ccb_dev_match *cdm) 2530 { 2531 int ret; 2532 2533 cdm->num_matches = 0; 2534 2535 /* 2536 * At this point in the edt traversal function, we check the bus 2537 * list generation to make sure that no busses have been added or 2538 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2539 * For the peripheral driver list traversal function, however, we 2540 * don't have to worry about new peripheral driver types coming or 2541 * going; they're in a linker set, and therefore can't change 2542 * without a recompile. 2543 */ 2544 2545 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2546 && (cdm->pos.cookie.pdrv != NULL)) 2547 ret = xptpdrvtraverse( 2548 (struct periph_driver **)cdm->pos.cookie.pdrv, 2549 xptplistpdrvfunc, cdm); 2550 else 2551 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2552 2553 /* 2554 * If we get back 0, that means that we had to stop before fully 2555 * traversing the peripheral driver tree. It also means that one of 2556 * the subroutines has set the status field to the proper value. If 2557 * we get back 1, we've fully traversed the EDT and copied out any 2558 * matching entries. 2559 */ 2560 if (ret == 1) 2561 cdm->status = CAM_DEV_MATCH_LAST; 2562 2563 return(ret); 2564 } 2565 2566 static int 2567 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2568 { 2569 struct cam_eb *bus, *next_bus; 2570 int retval; 2571 2572 retval = 1; 2573 2574 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2575 bus != NULL; 2576 bus = next_bus) { 2577 next_bus = TAILQ_NEXT(bus, links); 2578 2579 retval = tr_func(bus, arg); 2580 if (retval == 0) 2581 return(retval); 2582 } 2583 2584 return(retval); 2585 } 2586 2587 static int 2588 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2589 xpt_targetfunc_t *tr_func, void *arg) 2590 { 2591 struct cam_et *target, *next_target; 2592 int retval; 2593 2594 retval = 1; 2595 for (target = (start_target ? start_target : 2596 TAILQ_FIRST(&bus->et_entries)); 2597 target != NULL; target = next_target) { 2598 2599 next_target = TAILQ_NEXT(target, links); 2600 2601 retval = tr_func(target, arg); 2602 2603 if (retval == 0) 2604 return(retval); 2605 } 2606 2607 return(retval); 2608 } 2609 2610 static int 2611 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2612 xpt_devicefunc_t *tr_func, void *arg) 2613 { 2614 struct cam_ed *device, *next_device; 2615 int retval; 2616 2617 retval = 1; 2618 for (device = (start_device ? start_device : 2619 TAILQ_FIRST(&target->ed_entries)); 2620 device != NULL; 2621 device = next_device) { 2622 2623 next_device = TAILQ_NEXT(device, links); 2624 2625 retval = tr_func(device, arg); 2626 2627 if (retval == 0) 2628 return(retval); 2629 } 2630 2631 return(retval); 2632 } 2633 2634 static int 2635 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2636 xpt_periphfunc_t *tr_func, void *arg) 2637 { 2638 struct cam_periph *periph, *next_periph; 2639 int retval; 2640 2641 retval = 1; 2642 2643 for (periph = (start_periph ? start_periph : 2644 SLIST_FIRST(&device->periphs)); 2645 periph != NULL; 2646 periph = next_periph) { 2647 2648 next_periph = SLIST_NEXT(periph, periph_links); 2649 2650 retval = tr_func(periph, arg); 2651 if (retval == 0) 2652 return(retval); 2653 } 2654 2655 return(retval); 2656 } 2657 2658 static int 2659 xptpdrvtraverse(struct periph_driver **start_pdrv, 2660 xpt_pdrvfunc_t *tr_func, void *arg) 2661 { 2662 struct periph_driver **pdrv; 2663 int retval; 2664 2665 retval = 1; 2666 2667 /* 2668 * We don't traverse the peripheral driver list like we do the 2669 * other lists, because it is a linker set, and therefore cannot be 2670 * changed during runtime. If the peripheral driver list is ever 2671 * re-done to be something other than a linker set (i.e. it can 2672 * change while the system is running), the list traversal should 2673 * be modified to work like the other traversal functions. 2674 */ 2675 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2676 *pdrv != NULL; pdrv++) { 2677 retval = tr_func(pdrv, arg); 2678 2679 if (retval == 0) 2680 return(retval); 2681 } 2682 2683 return(retval); 2684 } 2685 2686 static int 2687 xptpdperiphtraverse(struct periph_driver **pdrv, 2688 struct cam_periph *start_periph, 2689 xpt_periphfunc_t *tr_func, void *arg) 2690 { 2691 struct cam_periph *periph, *next_periph; 2692 int retval; 2693 2694 retval = 1; 2695 2696 for (periph = (start_periph ? start_periph : 2697 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2698 periph = next_periph) { 2699 2700 next_periph = TAILQ_NEXT(periph, unit_links); 2701 2702 retval = tr_func(periph, arg); 2703 if (retval == 0) 2704 return(retval); 2705 } 2706 return(retval); 2707 } 2708 2709 static int 2710 xptdefbusfunc(struct cam_eb *bus, void *arg) 2711 { 2712 struct xpt_traverse_config *tr_config; 2713 2714 tr_config = (struct xpt_traverse_config *)arg; 2715 2716 if (tr_config->depth == XPT_DEPTH_BUS) { 2717 xpt_busfunc_t *tr_func; 2718 2719 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2720 2721 return(tr_func(bus, tr_config->tr_arg)); 2722 } else 2723 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2724 } 2725 2726 static int 2727 xptdeftargetfunc(struct cam_et *target, void *arg) 2728 { 2729 struct xpt_traverse_config *tr_config; 2730 2731 tr_config = (struct xpt_traverse_config *)arg; 2732 2733 if (tr_config->depth == XPT_DEPTH_TARGET) { 2734 xpt_targetfunc_t *tr_func; 2735 2736 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2737 2738 return(tr_func(target, tr_config->tr_arg)); 2739 } else 2740 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2741 } 2742 2743 static int 2744 xptdefdevicefunc(struct cam_ed *device, void *arg) 2745 { 2746 struct xpt_traverse_config *tr_config; 2747 2748 tr_config = (struct xpt_traverse_config *)arg; 2749 2750 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2751 xpt_devicefunc_t *tr_func; 2752 2753 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2754 2755 return(tr_func(device, tr_config->tr_arg)); 2756 } else 2757 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2758 } 2759 2760 static int 2761 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2762 { 2763 struct xpt_traverse_config *tr_config; 2764 xpt_periphfunc_t *tr_func; 2765 2766 tr_config = (struct xpt_traverse_config *)arg; 2767 2768 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2769 2770 /* 2771 * Unlike the other default functions, we don't check for depth 2772 * here. The peripheral driver level is the last level in the EDT, 2773 * so if we're here, we should execute the function in question. 2774 */ 2775 return(tr_func(periph, tr_config->tr_arg)); 2776 } 2777 2778 /* 2779 * Execute the given function for every bus in the EDT. 2780 */ 2781 static int 2782 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2783 { 2784 struct xpt_traverse_config tr_config; 2785 2786 tr_config.depth = XPT_DEPTH_BUS; 2787 tr_config.tr_func = tr_func; 2788 tr_config.tr_arg = arg; 2789 2790 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2791 } 2792 2793 #ifdef notusedyet 2794 /* 2795 * Execute the given function for every target in the EDT. 2796 */ 2797 static int 2798 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2799 { 2800 struct xpt_traverse_config tr_config; 2801 2802 tr_config.depth = XPT_DEPTH_TARGET; 2803 tr_config.tr_func = tr_func; 2804 tr_config.tr_arg = arg; 2805 2806 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2807 } 2808 #endif /* notusedyet */ 2809 2810 /* 2811 * Execute the given function for every device in the EDT. 2812 */ 2813 static int 2814 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2815 { 2816 struct xpt_traverse_config tr_config; 2817 2818 tr_config.depth = XPT_DEPTH_DEVICE; 2819 tr_config.tr_func = tr_func; 2820 tr_config.tr_arg = arg; 2821 2822 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2823 } 2824 2825 #ifdef notusedyet 2826 /* 2827 * Execute the given function for every peripheral in the EDT. 2828 */ 2829 static int 2830 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2831 { 2832 struct xpt_traverse_config tr_config; 2833 2834 tr_config.depth = XPT_DEPTH_PERIPH; 2835 tr_config.tr_func = tr_func; 2836 tr_config.tr_arg = arg; 2837 2838 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2839 } 2840 #endif /* notusedyet */ 2841 2842 static int 2843 xptsetasyncfunc(struct cam_ed *device, void *arg) 2844 { 2845 struct cam_path path; 2846 struct ccb_getdev cgd; 2847 struct async_node *cur_entry; 2848 2849 cur_entry = (struct async_node *)arg; 2850 2851 /* 2852 * Don't report unconfigured devices (Wildcard devs, 2853 * devices only for target mode, device instances 2854 * that have been invalidated but are waiting for 2855 * their last reference count to be released). 2856 */ 2857 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2858 return (1); 2859 2860 xpt_compile_path(&path, 2861 NULL, 2862 device->target->bus->path_id, 2863 device->target->target_id, 2864 device->lun_id); 2865 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2866 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2867 xpt_action((union ccb *)&cgd); 2868 cur_entry->callback(cur_entry->callback_arg, 2869 AC_FOUND_DEVICE, 2870 &path, &cgd); 2871 xpt_release_path(&path); 2872 2873 return(1); 2874 } 2875 2876 static int 2877 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2878 { 2879 struct cam_path path; 2880 struct ccb_pathinq cpi; 2881 struct async_node *cur_entry; 2882 2883 cur_entry = (struct async_node *)arg; 2884 2885 xpt_compile_path(&path, /*periph*/NULL, 2886 bus->sim->path_id, 2887 CAM_TARGET_WILDCARD, 2888 CAM_LUN_WILDCARD); 2889 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2890 cpi.ccb_h.func_code = XPT_PATH_INQ; 2891 xpt_action((union ccb *)&cpi); 2892 cur_entry->callback(cur_entry->callback_arg, 2893 AC_PATH_REGISTERED, 2894 &path, &cpi); 2895 xpt_release_path(&path); 2896 2897 return(1); 2898 } 2899 2900 void 2901 xpt_action(union ccb *start_ccb) 2902 { 2903 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2904 2905 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2906 2907 crit_enter(); 2908 2909 switch (start_ccb->ccb_h.func_code) { 2910 case XPT_SCSI_IO: 2911 { 2912 #ifdef CAM_NEW_TRAN_CODE 2913 struct cam_ed *device; 2914 #endif /* CAM_NEW_TRAN_CODE */ 2915 #ifdef CAMDEBUG 2916 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2917 struct cam_path *path; 2918 2919 path = start_ccb->ccb_h.path; 2920 #endif 2921 2922 /* 2923 * For the sake of compatibility with SCSI-1 2924 * devices that may not understand the identify 2925 * message, we include lun information in the 2926 * second byte of all commands. SCSI-1 specifies 2927 * that luns are a 3 bit value and reserves only 3 2928 * bits for lun information in the CDB. Later 2929 * revisions of the SCSI spec allow for more than 8 2930 * luns, but have deprecated lun information in the 2931 * CDB. So, if the lun won't fit, we must omit. 2932 * 2933 * Also be aware that during initial probing for devices, 2934 * the inquiry information is unknown but initialized to 0. 2935 * This means that this code will be exercised while probing 2936 * devices with an ANSI revision greater than 2. 2937 */ 2938 #ifdef CAM_NEW_TRAN_CODE 2939 device = start_ccb->ccb_h.path->device; 2940 if (device->protocol_version <= SCSI_REV_2 2941 #else /* CAM_NEW_TRAN_CODE */ 2942 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2943 #endif /* CAM_NEW_TRAN_CODE */ 2944 && start_ccb->ccb_h.target_lun < 8 2945 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2946 2947 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2948 start_ccb->ccb_h.target_lun << 5; 2949 } 2950 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2951 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2952 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2953 &path->device->inq_data), 2954 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2955 cdb_str, sizeof(cdb_str)))); 2956 /* FALLTHROUGH */ 2957 } 2958 case XPT_TARGET_IO: 2959 case XPT_CONT_TARGET_IO: 2960 start_ccb->csio.sense_resid = 0; 2961 start_ccb->csio.resid = 0; 2962 /* FALLTHROUGH */ 2963 case XPT_RESET_DEV: 2964 case XPT_ENG_EXEC: 2965 { 2966 struct cam_path *path; 2967 int runq; 2968 2969 path = start_ccb->ccb_h.path; 2970 2971 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2972 if (path->device->qfrozen_cnt == 0) 2973 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2974 else 2975 runq = 0; 2976 if (runq != 0) 2977 xpt_run_dev_sendq(path->bus); 2978 break; 2979 } 2980 case XPT_SET_TRAN_SETTINGS: 2981 { 2982 xpt_set_transfer_settings(&start_ccb->cts, 2983 start_ccb->ccb_h.path->device, 2984 /*async_update*/FALSE); 2985 break; 2986 } 2987 case XPT_CALC_GEOMETRY: 2988 { 2989 struct cam_sim *sim; 2990 2991 /* Filter out garbage */ 2992 if (start_ccb->ccg.block_size == 0 2993 || start_ccb->ccg.volume_size == 0) { 2994 start_ccb->ccg.cylinders = 0; 2995 start_ccb->ccg.heads = 0; 2996 start_ccb->ccg.secs_per_track = 0; 2997 start_ccb->ccb_h.status = CAM_REQ_CMP; 2998 break; 2999 } 3000 sim = start_ccb->ccb_h.path->bus->sim; 3001 (*(sim->sim_action))(sim, start_ccb); 3002 break; 3003 } 3004 case XPT_ABORT: 3005 { 3006 union ccb* abort_ccb; 3007 3008 abort_ccb = start_ccb->cab.abort_ccb; 3009 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 3010 3011 if (abort_ccb->ccb_h.pinfo.index >= 0) { 3012 struct cam_ccbq *ccbq; 3013 3014 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3015 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3016 abort_ccb->ccb_h.status = 3017 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3018 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3019 xpt_done(abort_ccb); 3020 start_ccb->ccb_h.status = CAM_REQ_CMP; 3021 break; 3022 } 3023 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3024 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3025 /* 3026 * We've caught this ccb en route to 3027 * the SIM. Flag it for abort and the 3028 * SIM will do so just before starting 3029 * real work on the CCB. 3030 */ 3031 abort_ccb->ccb_h.status = 3032 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3033 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3034 start_ccb->ccb_h.status = CAM_REQ_CMP; 3035 break; 3036 } 3037 } 3038 if (XPT_FC_IS_QUEUED(abort_ccb) 3039 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3040 /* 3041 * It's already completed but waiting 3042 * for our SWI to get to it. 3043 */ 3044 start_ccb->ccb_h.status = CAM_UA_ABORT; 3045 break; 3046 } 3047 /* 3048 * If we weren't able to take care of the abort request 3049 * in the XPT, pass the request down to the SIM for processing. 3050 */ 3051 /* FALLTHROUGH */ 3052 } 3053 case XPT_ACCEPT_TARGET_IO: 3054 case XPT_EN_LUN: 3055 case XPT_IMMED_NOTIFY: 3056 case XPT_NOTIFY_ACK: 3057 case XPT_GET_TRAN_SETTINGS: 3058 case XPT_RESET_BUS: 3059 { 3060 struct cam_sim *sim; 3061 3062 sim = start_ccb->ccb_h.path->bus->sim; 3063 (*(sim->sim_action))(sim, start_ccb); 3064 break; 3065 } 3066 case XPT_PATH_INQ: 3067 { 3068 struct cam_sim *sim; 3069 3070 sim = start_ccb->ccb_h.path->bus->sim; 3071 (*(sim->sim_action))(sim, start_ccb); 3072 break; 3073 } 3074 case XPT_PATH_STATS: 3075 start_ccb->cpis.last_reset = 3076 start_ccb->ccb_h.path->bus->last_reset; 3077 start_ccb->ccb_h.status = CAM_REQ_CMP; 3078 break; 3079 case XPT_GDEV_TYPE: 3080 { 3081 struct cam_ed *dev; 3082 3083 dev = start_ccb->ccb_h.path->device; 3084 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3085 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3086 } else { 3087 struct ccb_getdev *cgd; 3088 struct cam_eb *bus; 3089 struct cam_et *tar; 3090 3091 cgd = &start_ccb->cgd; 3092 bus = cgd->ccb_h.path->bus; 3093 tar = cgd->ccb_h.path->target; 3094 cgd->inq_data = dev->inq_data; 3095 cgd->ccb_h.status = CAM_REQ_CMP; 3096 cgd->serial_num_len = dev->serial_num_len; 3097 if ((dev->serial_num_len > 0) 3098 && (dev->serial_num != NULL)) 3099 bcopy(dev->serial_num, cgd->serial_num, 3100 dev->serial_num_len); 3101 } 3102 break; 3103 } 3104 case XPT_GDEV_STATS: 3105 { 3106 struct cam_ed *dev; 3107 3108 dev = start_ccb->ccb_h.path->device; 3109 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3110 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3111 } else { 3112 struct ccb_getdevstats *cgds; 3113 struct cam_eb *bus; 3114 struct cam_et *tar; 3115 3116 cgds = &start_ccb->cgds; 3117 bus = cgds->ccb_h.path->bus; 3118 tar = cgds->ccb_h.path->target; 3119 cgds->dev_openings = dev->ccbq.dev_openings; 3120 cgds->dev_active = dev->ccbq.dev_active; 3121 cgds->devq_openings = dev->ccbq.devq_openings; 3122 cgds->devq_queued = dev->ccbq.queue.entries; 3123 cgds->held = dev->ccbq.held; 3124 cgds->last_reset = tar->last_reset; 3125 cgds->maxtags = dev->quirk->maxtags; 3126 cgds->mintags = dev->quirk->mintags; 3127 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3128 cgds->last_reset = bus->last_reset; 3129 cgds->ccb_h.status = CAM_REQ_CMP; 3130 } 3131 break; 3132 } 3133 case XPT_GDEVLIST: 3134 { 3135 struct cam_periph *nperiph; 3136 struct periph_list *periph_head; 3137 struct ccb_getdevlist *cgdl; 3138 u_int i; 3139 struct cam_ed *device; 3140 int found; 3141 3142 3143 found = 0; 3144 3145 /* 3146 * Don't want anyone mucking with our data. 3147 */ 3148 device = start_ccb->ccb_h.path->device; 3149 periph_head = &device->periphs; 3150 cgdl = &start_ccb->cgdl; 3151 3152 /* 3153 * Check and see if the list has changed since the user 3154 * last requested a list member. If so, tell them that the 3155 * list has changed, and therefore they need to start over 3156 * from the beginning. 3157 */ 3158 if ((cgdl->index != 0) && 3159 (cgdl->generation != device->generation)) { 3160 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3161 break; 3162 } 3163 3164 /* 3165 * Traverse the list of peripherals and attempt to find 3166 * the requested peripheral. 3167 */ 3168 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3169 (nperiph != NULL) && (i <= cgdl->index); 3170 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3171 if (i == cgdl->index) { 3172 strncpy(cgdl->periph_name, 3173 nperiph->periph_name, 3174 DEV_IDLEN); 3175 cgdl->unit_number = nperiph->unit_number; 3176 found = 1; 3177 } 3178 } 3179 if (found == 0) { 3180 cgdl->status = CAM_GDEVLIST_ERROR; 3181 break; 3182 } 3183 3184 if (nperiph == NULL) 3185 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3186 else 3187 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3188 3189 cgdl->index++; 3190 cgdl->generation = device->generation; 3191 3192 cgdl->ccb_h.status = CAM_REQ_CMP; 3193 break; 3194 } 3195 case XPT_DEV_MATCH: 3196 { 3197 dev_pos_type position_type; 3198 struct ccb_dev_match *cdm; 3199 int ret; 3200 3201 cdm = &start_ccb->cdm; 3202 3203 /* 3204 * Prevent EDT changes while we traverse it. 3205 */ 3206 /* 3207 * There are two ways of getting at information in the EDT. 3208 * The first way is via the primary EDT tree. It starts 3209 * with a list of busses, then a list of targets on a bus, 3210 * then devices/luns on a target, and then peripherals on a 3211 * device/lun. The "other" way is by the peripheral driver 3212 * lists. The peripheral driver lists are organized by 3213 * peripheral driver. (obviously) So it makes sense to 3214 * use the peripheral driver list if the user is looking 3215 * for something like "da1", or all "da" devices. If the 3216 * user is looking for something on a particular bus/target 3217 * or lun, it's generally better to go through the EDT tree. 3218 */ 3219 3220 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3221 position_type = cdm->pos.position_type; 3222 else { 3223 u_int i; 3224 3225 position_type = CAM_DEV_POS_NONE; 3226 3227 for (i = 0; i < cdm->num_patterns; i++) { 3228 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3229 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3230 position_type = CAM_DEV_POS_EDT; 3231 break; 3232 } 3233 } 3234 3235 if (cdm->num_patterns == 0) 3236 position_type = CAM_DEV_POS_EDT; 3237 else if (position_type == CAM_DEV_POS_NONE) 3238 position_type = CAM_DEV_POS_PDRV; 3239 } 3240 3241 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3242 case CAM_DEV_POS_EDT: 3243 ret = xptedtmatch(cdm); 3244 break; 3245 case CAM_DEV_POS_PDRV: 3246 ret = xptperiphlistmatch(cdm); 3247 break; 3248 default: 3249 cdm->status = CAM_DEV_MATCH_ERROR; 3250 break; 3251 } 3252 3253 if (cdm->status == CAM_DEV_MATCH_ERROR) 3254 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3255 else 3256 start_ccb->ccb_h.status = CAM_REQ_CMP; 3257 3258 break; 3259 } 3260 case XPT_SASYNC_CB: 3261 { 3262 struct ccb_setasync *csa; 3263 struct async_node *cur_entry; 3264 struct async_list *async_head; 3265 u_int32_t added; 3266 3267 csa = &start_ccb->csa; 3268 added = csa->event_enable; 3269 async_head = &csa->ccb_h.path->device->asyncs; 3270 3271 /* 3272 * If there is already an entry for us, simply 3273 * update it. 3274 */ 3275 cur_entry = SLIST_FIRST(async_head); 3276 while (cur_entry != NULL) { 3277 if ((cur_entry->callback_arg == csa->callback_arg) 3278 && (cur_entry->callback == csa->callback)) 3279 break; 3280 cur_entry = SLIST_NEXT(cur_entry, links); 3281 } 3282 3283 if (cur_entry != NULL) { 3284 /* 3285 * If the request has no flags set, 3286 * remove the entry. 3287 */ 3288 added &= ~cur_entry->event_enable; 3289 if (csa->event_enable == 0) { 3290 SLIST_REMOVE(async_head, cur_entry, 3291 async_node, links); 3292 csa->ccb_h.path->device->refcount--; 3293 kfree(cur_entry, M_DEVBUF); 3294 } else { 3295 cur_entry->event_enable = csa->event_enable; 3296 } 3297 } else { 3298 cur_entry = kmalloc(sizeof(*cur_entry), 3299 M_DEVBUF, M_INTWAIT); 3300 cur_entry->event_enable = csa->event_enable; 3301 cur_entry->callback_arg = csa->callback_arg; 3302 cur_entry->callback = csa->callback; 3303 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3304 csa->ccb_h.path->device->refcount++; 3305 } 3306 3307 if ((added & AC_FOUND_DEVICE) != 0) { 3308 /* 3309 * Get this peripheral up to date with all 3310 * the currently existing devices. 3311 */ 3312 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3313 } 3314 if ((added & AC_PATH_REGISTERED) != 0) { 3315 /* 3316 * Get this peripheral up to date with all 3317 * the currently existing busses. 3318 */ 3319 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3320 } 3321 start_ccb->ccb_h.status = CAM_REQ_CMP; 3322 break; 3323 } 3324 case XPT_REL_SIMQ: 3325 { 3326 struct ccb_relsim *crs; 3327 struct cam_ed *dev; 3328 3329 crs = &start_ccb->crs; 3330 dev = crs->ccb_h.path->device; 3331 if (dev == NULL) { 3332 3333 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3334 break; 3335 } 3336 3337 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3338 3339 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3340 3341 /* Don't ever go below one opening */ 3342 if (crs->openings > 0) { 3343 xpt_dev_ccbq_resize(crs->ccb_h.path, 3344 crs->openings); 3345 3346 if (bootverbose) { 3347 xpt_print_path(crs->ccb_h.path); 3348 kprintf("tagged openings " 3349 "now %d\n", 3350 crs->openings); 3351 } 3352 } 3353 } 3354 } 3355 3356 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3357 3358 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3359 3360 /* 3361 * Just extend the old timeout and decrement 3362 * the freeze count so that a single timeout 3363 * is sufficient for releasing the queue. 3364 */ 3365 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3366 callout_stop(&dev->c_handle); 3367 } else { 3368 3369 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3370 } 3371 3372 callout_reset(&dev->c_handle, 3373 (crs->release_timeout * hz) / 1000, 3374 xpt_release_devq_timeout, dev); 3375 3376 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3377 3378 } 3379 3380 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3381 3382 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3383 /* 3384 * Decrement the freeze count so that a single 3385 * completion is still sufficient to unfreeze 3386 * the queue. 3387 */ 3388 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3389 } else { 3390 3391 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3392 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3393 } 3394 } 3395 3396 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3397 3398 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3399 || (dev->ccbq.dev_active == 0)) { 3400 3401 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3402 } else { 3403 3404 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3405 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3406 } 3407 } 3408 3409 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3410 3411 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3412 /*run_queue*/TRUE); 3413 } 3414 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3415 start_ccb->ccb_h.status = CAM_REQ_CMP; 3416 break; 3417 } 3418 case XPT_SCAN_BUS: 3419 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3420 break; 3421 case XPT_SCAN_LUN: 3422 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3423 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3424 start_ccb); 3425 break; 3426 case XPT_DEBUG: { 3427 #ifdef CAMDEBUG 3428 #ifdef CAM_DEBUG_DELAY 3429 cam_debug_delay = CAM_DEBUG_DELAY; 3430 #endif 3431 cam_dflags = start_ccb->cdbg.flags; 3432 if (cam_dpath != NULL) { 3433 xpt_free_path(cam_dpath); 3434 cam_dpath = NULL; 3435 } 3436 3437 if (cam_dflags != CAM_DEBUG_NONE) { 3438 if (xpt_create_path(&cam_dpath, xpt_periph, 3439 start_ccb->ccb_h.path_id, 3440 start_ccb->ccb_h.target_id, 3441 start_ccb->ccb_h.target_lun) != 3442 CAM_REQ_CMP) { 3443 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3444 cam_dflags = CAM_DEBUG_NONE; 3445 } else { 3446 start_ccb->ccb_h.status = CAM_REQ_CMP; 3447 xpt_print_path(cam_dpath); 3448 kprintf("debugging flags now %x\n", cam_dflags); 3449 } 3450 } else { 3451 cam_dpath = NULL; 3452 start_ccb->ccb_h.status = CAM_REQ_CMP; 3453 } 3454 #else /* !CAMDEBUG */ 3455 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3456 #endif /* CAMDEBUG */ 3457 break; 3458 } 3459 case XPT_NOOP: 3460 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3461 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3462 start_ccb->ccb_h.status = CAM_REQ_CMP; 3463 break; 3464 default: 3465 case XPT_SDEV_TYPE: 3466 case XPT_TERM_IO: 3467 case XPT_ENG_INQ: 3468 /* XXX Implement */ 3469 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3470 break; 3471 } 3472 crit_exit(); 3473 } 3474 3475 void 3476 xpt_polled_action(union ccb *start_ccb) 3477 { 3478 u_int32_t timeout; 3479 struct cam_sim *sim; 3480 struct cam_devq *devq; 3481 struct cam_ed *dev; 3482 3483 timeout = start_ccb->ccb_h.timeout; 3484 sim = start_ccb->ccb_h.path->bus->sim; 3485 devq = sim->devq; 3486 dev = start_ccb->ccb_h.path->device; 3487 3488 crit_enter(); 3489 3490 /* 3491 * Steal an opening so that no other queued requests 3492 * can get it before us while we simulate interrupts. 3493 */ 3494 dev->ccbq.devq_openings--; 3495 dev->ccbq.dev_openings--; 3496 3497 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3498 && (--timeout > 0)) { 3499 DELAY(1000); 3500 (*(sim->sim_poll))(sim); 3501 swi_camnet(NULL, NULL); 3502 swi_cambio(NULL, NULL); 3503 } 3504 3505 dev->ccbq.devq_openings++; 3506 dev->ccbq.dev_openings++; 3507 3508 if (timeout != 0) { 3509 xpt_action(start_ccb); 3510 while(--timeout > 0) { 3511 (*(sim->sim_poll))(sim); 3512 swi_camnet(NULL, NULL); 3513 swi_cambio(NULL, NULL); 3514 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3515 != CAM_REQ_INPROG) 3516 break; 3517 DELAY(1000); 3518 } 3519 if (timeout == 0) { 3520 /* 3521 * XXX Is it worth adding a sim_timeout entry 3522 * point so we can attempt recovery? If 3523 * this is only used for dumps, I don't think 3524 * it is. 3525 */ 3526 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3527 } 3528 } else { 3529 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3530 } 3531 crit_exit(); 3532 } 3533 3534 /* 3535 * Schedule a peripheral driver to receive a ccb when it's 3536 * target device has space for more transactions. 3537 */ 3538 void 3539 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3540 { 3541 struct cam_ed *device; 3542 int runq; 3543 3544 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3545 device = perph->path->device; 3546 crit_enter(); 3547 if (periph_is_queued(perph)) { 3548 /* Simply reorder based on new priority */ 3549 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3550 (" change priority to %d\n", new_priority)); 3551 if (new_priority < perph->pinfo.priority) { 3552 camq_change_priority(&device->drvq, 3553 perph->pinfo.index, 3554 new_priority); 3555 } 3556 runq = 0; 3557 } else { 3558 /* New entry on the queue */ 3559 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3560 (" added periph to queue\n")); 3561 perph->pinfo.priority = new_priority; 3562 perph->pinfo.generation = ++device->drvq.generation; 3563 camq_insert(&device->drvq, &perph->pinfo); 3564 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3565 } 3566 crit_exit(); 3567 if (runq != 0) { 3568 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3569 (" calling xpt_run_devq\n")); 3570 xpt_run_dev_allocq(perph->path->bus); 3571 } 3572 } 3573 3574 3575 /* 3576 * Schedule a device to run on a given queue. 3577 * If the device was inserted as a new entry on the queue, 3578 * return 1 meaning the device queue should be run. If we 3579 * were already queued, implying someone else has already 3580 * started the queue, return 0 so the caller doesn't attempt 3581 * to run the queue. Must be run in a critical section. 3582 */ 3583 static int 3584 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3585 u_int32_t new_priority) 3586 { 3587 int retval; 3588 u_int32_t old_priority; 3589 3590 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3591 3592 old_priority = pinfo->priority; 3593 3594 /* 3595 * Are we already queued? 3596 */ 3597 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3598 /* Simply reorder based on new priority */ 3599 if (new_priority < old_priority) { 3600 camq_change_priority(queue, pinfo->index, 3601 new_priority); 3602 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3603 ("changed priority to %d\n", 3604 new_priority)); 3605 } 3606 retval = 0; 3607 } else { 3608 /* New entry on the queue */ 3609 if (new_priority < old_priority) 3610 pinfo->priority = new_priority; 3611 3612 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3613 ("Inserting onto queue\n")); 3614 pinfo->generation = ++queue->generation; 3615 camq_insert(queue, pinfo); 3616 retval = 1; 3617 } 3618 return (retval); 3619 } 3620 3621 static void 3622 xpt_run_dev_allocq(struct cam_eb *bus) 3623 { 3624 struct cam_devq *devq; 3625 3626 if ((devq = bus->sim->devq) == NULL) { 3627 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3628 return; 3629 } 3630 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3631 3632 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3633 (" qfrozen_cnt == 0x%x, entries == %d, " 3634 "openings == %d, active == %d\n", 3635 devq->alloc_queue.qfrozen_cnt, 3636 devq->alloc_queue.entries, 3637 devq->alloc_openings, 3638 devq->alloc_active)); 3639 3640 crit_enter(); 3641 devq->alloc_queue.qfrozen_cnt++; 3642 while ((devq->alloc_queue.entries > 0) 3643 && (devq->alloc_openings > 0) 3644 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3645 struct cam_ed_qinfo *qinfo; 3646 struct cam_ed *device; 3647 union ccb *work_ccb; 3648 struct cam_periph *drv; 3649 struct camq *drvq; 3650 3651 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3652 CAMQ_HEAD); 3653 device = qinfo->device; 3654 3655 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3656 ("running device %p\n", device)); 3657 3658 drvq = &device->drvq; 3659 3660 #ifdef CAMDEBUG 3661 if (drvq->entries <= 0) { 3662 panic("xpt_run_dev_allocq: " 3663 "Device on queue without any work to do"); 3664 } 3665 #endif 3666 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3667 devq->alloc_openings--; 3668 devq->alloc_active++; 3669 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3670 crit_exit(); 3671 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3672 drv->pinfo.priority); 3673 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3674 ("calling periph start\n")); 3675 drv->periph_start(drv, work_ccb); 3676 } else { 3677 /* 3678 * Malloc failure in alloc_ccb 3679 */ 3680 /* 3681 * XXX add us to a list to be run from free_ccb 3682 * if we don't have any ccbs active on this 3683 * device queue otherwise we may never get run 3684 * again. 3685 */ 3686 break; 3687 } 3688 3689 /* Raise IPL for possible insertion and test at top of loop */ 3690 crit_enter(); 3691 3692 if (drvq->entries > 0) { 3693 /* We have more work. Attempt to reschedule */ 3694 xpt_schedule_dev_allocq(bus, device); 3695 } 3696 } 3697 devq->alloc_queue.qfrozen_cnt--; 3698 crit_exit(); 3699 } 3700 3701 static void 3702 xpt_run_dev_sendq(struct cam_eb *bus) 3703 { 3704 struct cam_devq *devq; 3705 3706 if ((devq = bus->sim->devq) == NULL) { 3707 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3708 return; 3709 } 3710 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3711 3712 crit_enter(); 3713 devq->send_queue.qfrozen_cnt++; 3714 while ((devq->send_queue.entries > 0) 3715 && (devq->send_openings > 0)) { 3716 struct cam_ed_qinfo *qinfo; 3717 struct cam_ed *device; 3718 union ccb *work_ccb; 3719 struct cam_sim *sim; 3720 3721 if (devq->send_queue.qfrozen_cnt > 1) { 3722 break; 3723 } 3724 3725 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3726 CAMQ_HEAD); 3727 device = qinfo->device; 3728 3729 /* 3730 * If the device has been "frozen", don't attempt 3731 * to run it. 3732 */ 3733 if (device->qfrozen_cnt > 0) { 3734 continue; 3735 } 3736 3737 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3738 ("running device %p\n", device)); 3739 3740 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3741 if (work_ccb == NULL) { 3742 kprintf("device on run queue with no ccbs???\n"); 3743 continue; 3744 } 3745 3746 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3747 3748 if (num_highpower <= 0) { 3749 /* 3750 * We got a high power command, but we 3751 * don't have any available slots. Freeze 3752 * the device queue until we have a slot 3753 * available. 3754 */ 3755 device->qfrozen_cnt++; 3756 STAILQ_INSERT_TAIL(&highpowerq, 3757 &work_ccb->ccb_h, 3758 xpt_links.stqe); 3759 3760 continue; 3761 } else { 3762 /* 3763 * Consume a high power slot while 3764 * this ccb runs. 3765 */ 3766 num_highpower--; 3767 } 3768 } 3769 devq->active_dev = device; 3770 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3771 3772 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3773 3774 devq->send_openings--; 3775 devq->send_active++; 3776 3777 if (device->ccbq.queue.entries > 0) 3778 xpt_schedule_dev_sendq(bus, device); 3779 3780 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3781 /* 3782 * The client wants to freeze the queue 3783 * after this CCB is sent. 3784 */ 3785 device->qfrozen_cnt++; 3786 } 3787 3788 /* In Target mode, the peripheral driver knows best... */ 3789 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3790 if ((device->inq_flags & SID_CmdQue) != 0 3791 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3792 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3793 else 3794 /* 3795 * Clear this in case of a retried CCB that 3796 * failed due to a rejected tag. 3797 */ 3798 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3799 } 3800 3801 /* 3802 * Device queues can be shared among multiple sim instances 3803 * that reside on different busses. Use the SIM in the queue 3804 * CCB's path, rather than the one in the bus that was passed 3805 * into this function. 3806 */ 3807 sim = work_ccb->ccb_h.path->bus->sim; 3808 (*(sim->sim_action))(sim, work_ccb); 3809 3810 devq->active_dev = NULL; 3811 /* Raise IPL for possible insertion and test at top of loop */ 3812 } 3813 devq->send_queue.qfrozen_cnt--; 3814 crit_exit(); 3815 } 3816 3817 /* 3818 * This function merges stuff from the slave ccb into the master ccb, while 3819 * keeping important fields in the master ccb constant. 3820 */ 3821 void 3822 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3823 { 3824 /* 3825 * Pull fields that are valid for peripheral drivers to set 3826 * into the master CCB along with the CCB "payload". 3827 */ 3828 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3829 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3830 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3831 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3832 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3833 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3834 } 3835 3836 void 3837 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3838 { 3839 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3840 callout_init(&ccb_h->timeout_ch); 3841 ccb_h->pinfo.priority = priority; 3842 ccb_h->path = path; 3843 ccb_h->path_id = path->bus->path_id; 3844 if (path->target) 3845 ccb_h->target_id = path->target->target_id; 3846 else 3847 ccb_h->target_id = CAM_TARGET_WILDCARD; 3848 if (path->device) { 3849 ccb_h->target_lun = path->device->lun_id; 3850 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3851 } else { 3852 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3853 } 3854 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3855 ccb_h->flags = 0; 3856 } 3857 3858 /* Path manipulation functions */ 3859 cam_status 3860 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3861 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3862 { 3863 struct cam_path *path; 3864 cam_status status; 3865 3866 path = kmalloc(sizeof(*path), M_DEVBUF, M_INTWAIT); 3867 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3868 if (status != CAM_REQ_CMP) { 3869 kfree(path, M_DEVBUF); 3870 path = NULL; 3871 } 3872 *new_path_ptr = path; 3873 return (status); 3874 } 3875 3876 static cam_status 3877 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3878 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3879 { 3880 struct cam_eb *bus; 3881 struct cam_et *target; 3882 struct cam_ed *device; 3883 cam_status status; 3884 3885 status = CAM_REQ_CMP; /* Completed without error */ 3886 target = NULL; /* Wildcarded */ 3887 device = NULL; /* Wildcarded */ 3888 3889 /* 3890 * We will potentially modify the EDT, so block interrupts 3891 * that may attempt to create cam paths. 3892 */ 3893 crit_enter(); 3894 bus = xpt_find_bus(path_id); 3895 if (bus == NULL) { 3896 status = CAM_PATH_INVALID; 3897 } else { 3898 target = xpt_find_target(bus, target_id); 3899 if (target == NULL) { 3900 /* Create one */ 3901 struct cam_et *new_target; 3902 3903 new_target = xpt_alloc_target(bus, target_id); 3904 if (new_target == NULL) { 3905 status = CAM_RESRC_UNAVAIL; 3906 } else { 3907 target = new_target; 3908 } 3909 } 3910 if (target != NULL) { 3911 device = xpt_find_device(target, lun_id); 3912 if (device == NULL) { 3913 /* Create one */ 3914 struct cam_ed *new_device; 3915 3916 new_device = xpt_alloc_device(bus, 3917 target, 3918 lun_id); 3919 if (new_device == NULL) { 3920 status = CAM_RESRC_UNAVAIL; 3921 } else { 3922 device = new_device; 3923 } 3924 } 3925 } 3926 } 3927 crit_exit(); 3928 3929 /* 3930 * Only touch the user's data if we are successful. 3931 */ 3932 if (status == CAM_REQ_CMP) { 3933 new_path->periph = perph; 3934 new_path->bus = bus; 3935 new_path->target = target; 3936 new_path->device = device; 3937 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3938 } else { 3939 if (device != NULL) 3940 xpt_release_device(bus, target, device); 3941 if (target != NULL) 3942 xpt_release_target(bus, target); 3943 if (bus != NULL) 3944 xpt_release_bus(bus); 3945 } 3946 return (status); 3947 } 3948 3949 static void 3950 xpt_release_path(struct cam_path *path) 3951 { 3952 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3953 if (path->device != NULL) { 3954 xpt_release_device(path->bus, path->target, path->device); 3955 path->device = NULL; 3956 } 3957 if (path->target != NULL) { 3958 xpt_release_target(path->bus, path->target); 3959 path->target = NULL; 3960 } 3961 if (path->bus != NULL) { 3962 xpt_release_bus(path->bus); 3963 path->bus = NULL; 3964 } 3965 } 3966 3967 void 3968 xpt_free_path(struct cam_path *path) 3969 { 3970 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3971 xpt_release_path(path); 3972 kfree(path, M_DEVBUF); 3973 } 3974 3975 3976 /* 3977 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3978 * in path1, 2 for match with wildcards in path2. 3979 */ 3980 int 3981 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3982 { 3983 int retval = 0; 3984 3985 if (path1->bus != path2->bus) { 3986 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3987 retval = 1; 3988 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3989 retval = 2; 3990 else 3991 return (-1); 3992 } 3993 if (path1->target != path2->target) { 3994 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3995 if (retval == 0) 3996 retval = 1; 3997 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3998 retval = 2; 3999 else 4000 return (-1); 4001 } 4002 if (path1->device != path2->device) { 4003 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 4004 if (retval == 0) 4005 retval = 1; 4006 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 4007 retval = 2; 4008 else 4009 return (-1); 4010 } 4011 return (retval); 4012 } 4013 4014 void 4015 xpt_print_path(struct cam_path *path) 4016 { 4017 if (path == NULL) 4018 kprintf("(nopath): "); 4019 else { 4020 if (path->periph != NULL) 4021 kprintf("(%s%d:", path->periph->periph_name, 4022 path->periph->unit_number); 4023 else 4024 kprintf("(noperiph:"); 4025 4026 if (path->bus != NULL) 4027 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4028 path->bus->sim->unit_number, 4029 path->bus->sim->bus_id); 4030 else 4031 kprintf("nobus:"); 4032 4033 if (path->target != NULL) 4034 kprintf("%d:", path->target->target_id); 4035 else 4036 kprintf("X:"); 4037 4038 if (path->device != NULL) 4039 kprintf("%d): ", path->device->lun_id); 4040 else 4041 kprintf("X): "); 4042 } 4043 } 4044 4045 int 4046 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4047 { 4048 struct sbuf sb; 4049 4050 sbuf_new(&sb, str, str_len, 0); 4051 4052 if (path == NULL) 4053 sbuf_printf(&sb, "(nopath): "); 4054 else { 4055 if (path->periph != NULL) 4056 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4057 path->periph->unit_number); 4058 else 4059 sbuf_printf(&sb, "(noperiph:"); 4060 4061 if (path->bus != NULL) 4062 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4063 path->bus->sim->unit_number, 4064 path->bus->sim->bus_id); 4065 else 4066 sbuf_printf(&sb, "nobus:"); 4067 4068 if (path->target != NULL) 4069 sbuf_printf(&sb, "%d:", path->target->target_id); 4070 else 4071 sbuf_printf(&sb, "X:"); 4072 4073 if (path->device != NULL) 4074 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4075 else 4076 sbuf_printf(&sb, "X): "); 4077 } 4078 sbuf_finish(&sb); 4079 4080 return(sbuf_len(&sb)); 4081 } 4082 4083 path_id_t 4084 xpt_path_path_id(struct cam_path *path) 4085 { 4086 return(path->bus->path_id); 4087 } 4088 4089 target_id_t 4090 xpt_path_target_id(struct cam_path *path) 4091 { 4092 if (path->target != NULL) 4093 return (path->target->target_id); 4094 else 4095 return (CAM_TARGET_WILDCARD); 4096 } 4097 4098 lun_id_t 4099 xpt_path_lun_id(struct cam_path *path) 4100 { 4101 if (path->device != NULL) 4102 return (path->device->lun_id); 4103 else 4104 return (CAM_LUN_WILDCARD); 4105 } 4106 4107 struct cam_sim * 4108 xpt_path_sim(struct cam_path *path) 4109 { 4110 return (path->bus->sim); 4111 } 4112 4113 struct cam_periph* 4114 xpt_path_periph(struct cam_path *path) 4115 { 4116 return (path->periph); 4117 } 4118 4119 /* 4120 * Release a CAM control block for the caller. Remit the cost of the structure 4121 * to the device referenced by the path. If the this device had no 'credits' 4122 * and peripheral drivers have registered async callbacks for this notification 4123 * call them now. 4124 */ 4125 void 4126 xpt_release_ccb(union ccb *free_ccb) 4127 { 4128 struct cam_path *path; 4129 struct cam_ed *device; 4130 struct cam_eb *bus; 4131 4132 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4133 path = free_ccb->ccb_h.path; 4134 device = path->device; 4135 bus = path->bus; 4136 crit_enter(); 4137 cam_ccbq_release_opening(&device->ccbq); 4138 if (xpt_ccb_count > xpt_max_ccbs) { 4139 xpt_free_ccb(free_ccb); 4140 xpt_ccb_count--; 4141 } else { 4142 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 4143 } 4144 if (bus->sim->devq) { 4145 bus->sim->devq->alloc_openings++; 4146 bus->sim->devq->alloc_active--; 4147 } 4148 /* XXX Turn this into an inline function - xpt_run_device?? */ 4149 if ((device_is_alloc_queued(device) == 0) 4150 && (device->drvq.entries > 0)) { 4151 xpt_schedule_dev_allocq(bus, device); 4152 } 4153 crit_exit(); 4154 if (bus->sim->devq && dev_allocq_is_runnable(bus->sim->devq)) 4155 xpt_run_dev_allocq(bus); 4156 } 4157 4158 /* Functions accessed by SIM drivers */ 4159 4160 /* 4161 * A sim structure, listing the SIM entry points and instance 4162 * identification info is passed to xpt_bus_register to hook the SIM 4163 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4164 * for this new bus and places it in the array of busses and assigns 4165 * it a path_id. The path_id may be influenced by "hard wiring" 4166 * information specified by the user. Once interrupt services are 4167 * availible, the bus will be probed. 4168 */ 4169 int32_t 4170 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4171 { 4172 struct cam_eb *new_bus; 4173 struct cam_eb *old_bus; 4174 struct ccb_pathinq cpi; 4175 4176 sim->bus_id = bus; 4177 new_bus = kmalloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT); 4178 4179 if (strcmp(sim->sim_name, "xpt") != 0) { 4180 sim->path_id = 4181 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4182 } 4183 4184 TAILQ_INIT(&new_bus->et_entries); 4185 new_bus->path_id = sim->path_id; 4186 new_bus->sim = sim; 4187 ++sim->refcount; 4188 timevalclear(&new_bus->last_reset); 4189 new_bus->flags = 0; 4190 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4191 new_bus->generation = 0; 4192 crit_enter(); 4193 old_bus = TAILQ_FIRST(&xpt_busses); 4194 while (old_bus != NULL 4195 && old_bus->path_id < new_bus->path_id) 4196 old_bus = TAILQ_NEXT(old_bus, links); 4197 if (old_bus != NULL) 4198 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4199 else 4200 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 4201 bus_generation++; 4202 crit_exit(); 4203 4204 /* Notify interested parties */ 4205 if (sim->path_id != CAM_XPT_PATH_ID) { 4206 struct cam_path path; 4207 4208 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4209 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4210 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4211 cpi.ccb_h.func_code = XPT_PATH_INQ; 4212 xpt_action((union ccb *)&cpi); 4213 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4214 xpt_release_path(&path); 4215 } 4216 return (CAM_SUCCESS); 4217 } 4218 4219 /* 4220 * Deregister a bus. We must clean out all transactions pending on the bus. 4221 * This routine is typically called prior to cam_sim_free() (e.g. see 4222 * dev/usbmisc/umass/umass.c) 4223 */ 4224 int32_t 4225 xpt_bus_deregister(path_id_t pathid) 4226 { 4227 struct cam_path bus_path; 4228 cam_status status; 4229 4230 status = xpt_compile_path(&bus_path, NULL, pathid, 4231 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4232 if (status != CAM_REQ_CMP) 4233 return (status); 4234 4235 /* 4236 * This should clear out all pending requests and timeouts, but 4237 * the ccb's may be queued to a software interrupt. 4238 * 4239 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4240 * and it really ought to. 4241 */ 4242 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4243 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4244 4245 /* make sure all responses have been processed */ 4246 camisr(&cam_netq); 4247 camisr(&cam_bioq); 4248 4249 /* Release the reference count held while registered. */ 4250 xpt_release_bus(bus_path.bus); 4251 xpt_release_path(&bus_path); 4252 4253 return (CAM_REQ_CMP); 4254 } 4255 4256 static path_id_t 4257 xptnextfreepathid(void) 4258 { 4259 struct cam_eb *bus; 4260 path_id_t pathid; 4261 char *strval; 4262 4263 pathid = 0; 4264 bus = TAILQ_FIRST(&xpt_busses); 4265 retry: 4266 /* Find an unoccupied pathid */ 4267 while (bus != NULL 4268 && bus->path_id <= pathid) { 4269 if (bus->path_id == pathid) 4270 pathid++; 4271 bus = TAILQ_NEXT(bus, links); 4272 } 4273 4274 /* 4275 * Ensure that this pathid is not reserved for 4276 * a bus that may be registered in the future. 4277 */ 4278 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4279 ++pathid; 4280 /* Start the search over */ 4281 goto retry; 4282 } 4283 return (pathid); 4284 } 4285 4286 static path_id_t 4287 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4288 { 4289 path_id_t pathid; 4290 int i, dunit, val; 4291 char buf[32]; 4292 4293 pathid = CAM_XPT_PATH_ID; 4294 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4295 i = -1; 4296 while ((i = resource_query_string(i, "at", buf)) != -1) { 4297 if (strcmp(resource_query_name(i), "scbus")) { 4298 /* Avoid a bit of foot shooting. */ 4299 continue; 4300 } 4301 dunit = resource_query_unit(i); 4302 if (dunit < 0) /* unwired?! */ 4303 continue; 4304 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4305 if (sim_bus == val) { 4306 pathid = dunit; 4307 break; 4308 } 4309 } else if (sim_bus == 0) { 4310 /* Unspecified matches bus 0 */ 4311 pathid = dunit; 4312 break; 4313 } else { 4314 kprintf("Ambiguous scbus configuration for %s%d " 4315 "bus %d, cannot wire down. The kernel " 4316 "config entry for scbus%d should " 4317 "specify a controller bus.\n" 4318 "Scbus will be assigned dynamically.\n", 4319 sim_name, sim_unit, sim_bus, dunit); 4320 break; 4321 } 4322 } 4323 4324 if (pathid == CAM_XPT_PATH_ID) 4325 pathid = xptnextfreepathid(); 4326 return (pathid); 4327 } 4328 4329 void 4330 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4331 { 4332 struct cam_eb *bus; 4333 struct cam_et *target, *next_target; 4334 struct cam_ed *device, *next_device; 4335 4336 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4337 4338 /* 4339 * Most async events come from a CAM interrupt context. In 4340 * a few cases, the error recovery code at the peripheral layer, 4341 * which may run from our SWI or a process context, may signal 4342 * deferred events with a call to xpt_async. Ensure async 4343 * notifications are serialized by blocking cam interrupts. 4344 */ 4345 crit_enter(); 4346 4347 bus = path->bus; 4348 4349 if (async_code == AC_BUS_RESET) { 4350 /* Update our notion of when the last reset occurred */ 4351 microuptime(&bus->last_reset); 4352 } 4353 4354 for (target = TAILQ_FIRST(&bus->et_entries); 4355 target != NULL; 4356 target = next_target) { 4357 4358 next_target = TAILQ_NEXT(target, links); 4359 4360 if (path->target != target 4361 && path->target->target_id != CAM_TARGET_WILDCARD 4362 && target->target_id != CAM_TARGET_WILDCARD) 4363 continue; 4364 4365 if (async_code == AC_SENT_BDR) { 4366 /* Update our notion of when the last reset occurred */ 4367 microuptime(&path->target->last_reset); 4368 } 4369 4370 for (device = TAILQ_FIRST(&target->ed_entries); 4371 device != NULL; 4372 device = next_device) { 4373 4374 next_device = TAILQ_NEXT(device, links); 4375 4376 if (path->device != device 4377 && path->device->lun_id != CAM_LUN_WILDCARD 4378 && device->lun_id != CAM_LUN_WILDCARD) 4379 continue; 4380 4381 xpt_dev_async(async_code, bus, target, 4382 device, async_arg); 4383 4384 xpt_async_bcast(&device->asyncs, async_code, 4385 path, async_arg); 4386 } 4387 } 4388 4389 /* 4390 * If this wasn't a fully wildcarded async, tell all 4391 * clients that want all async events. 4392 */ 4393 if (bus != xpt_periph->path->bus) 4394 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4395 path, async_arg); 4396 crit_exit(); 4397 } 4398 4399 static void 4400 xpt_async_bcast(struct async_list *async_head, 4401 u_int32_t async_code, 4402 struct cam_path *path, void *async_arg) 4403 { 4404 struct async_node *cur_entry; 4405 4406 cur_entry = SLIST_FIRST(async_head); 4407 while (cur_entry != NULL) { 4408 struct async_node *next_entry; 4409 /* 4410 * Grab the next list entry before we call the current 4411 * entry's callback. This is because the callback function 4412 * can delete its async callback entry. 4413 */ 4414 next_entry = SLIST_NEXT(cur_entry, links); 4415 if ((cur_entry->event_enable & async_code) != 0) 4416 cur_entry->callback(cur_entry->callback_arg, 4417 async_code, path, 4418 async_arg); 4419 cur_entry = next_entry; 4420 } 4421 } 4422 4423 /* 4424 * Handle any per-device event notifications that require action by the XPT. 4425 */ 4426 static void 4427 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4428 struct cam_ed *device, void *async_arg) 4429 { 4430 cam_status status; 4431 struct cam_path newpath; 4432 4433 /* 4434 * We only need to handle events for real devices. 4435 */ 4436 if (target->target_id == CAM_TARGET_WILDCARD 4437 || device->lun_id == CAM_LUN_WILDCARD) 4438 return; 4439 4440 /* 4441 * We need our own path with wildcards expanded to 4442 * handle certain types of events. 4443 */ 4444 if ((async_code == AC_SENT_BDR) 4445 || (async_code == AC_BUS_RESET) 4446 || (async_code == AC_INQ_CHANGED)) 4447 status = xpt_compile_path(&newpath, NULL, 4448 bus->path_id, 4449 target->target_id, 4450 device->lun_id); 4451 else 4452 status = CAM_REQ_CMP_ERR; 4453 4454 if (status == CAM_REQ_CMP) { 4455 4456 /* 4457 * Allow transfer negotiation to occur in a 4458 * tag free environment. 4459 */ 4460 if (async_code == AC_SENT_BDR 4461 || async_code == AC_BUS_RESET) 4462 xpt_toggle_tags(&newpath); 4463 4464 if (async_code == AC_INQ_CHANGED) { 4465 /* 4466 * We've sent a start unit command, or 4467 * something similar to a device that 4468 * may have caused its inquiry data to 4469 * change. So we re-scan the device to 4470 * refresh the inquiry data for it. 4471 */ 4472 xpt_scan_lun(newpath.periph, &newpath, 4473 CAM_EXPECT_INQ_CHANGE, NULL); 4474 } 4475 xpt_release_path(&newpath); 4476 } else if (async_code == AC_LOST_DEVICE) { 4477 /* 4478 * When we lose a device the device may be about to detach 4479 * the sim, we have to clear out all pending timeouts and 4480 * requests before that happens. XXX it would be nice if 4481 * we could abort the requests pertaining to the device. 4482 */ 4483 xpt_release_devq_timeout(device); 4484 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4485 device->flags |= CAM_DEV_UNCONFIGURED; 4486 xpt_release_device(bus, target, device); 4487 } 4488 } else if (async_code == AC_TRANSFER_NEG) { 4489 struct ccb_trans_settings *settings; 4490 4491 settings = (struct ccb_trans_settings *)async_arg; 4492 xpt_set_transfer_settings(settings, device, 4493 /*async_update*/TRUE); 4494 } 4495 } 4496 4497 u_int32_t 4498 xpt_freeze_devq(struct cam_path *path, u_int count) 4499 { 4500 struct ccb_hdr *ccbh; 4501 4502 crit_enter(); 4503 path->device->qfrozen_cnt += count; 4504 4505 /* 4506 * Mark the last CCB in the queue as needing 4507 * to be requeued if the driver hasn't 4508 * changed it's state yet. This fixes a race 4509 * where a ccb is just about to be queued to 4510 * a controller driver when it's interrupt routine 4511 * freezes the queue. To completly close the 4512 * hole, controller drives must check to see 4513 * if a ccb's status is still CAM_REQ_INPROG 4514 * under critical section protection just before they queue 4515 * the CCB. See ahc_action/ahc_freeze_devq for 4516 * an example. 4517 */ 4518 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4519 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4520 ccbh->status = CAM_REQUEUE_REQ; 4521 crit_exit(); 4522 return (path->device->qfrozen_cnt); 4523 } 4524 4525 u_int32_t 4526 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4527 { 4528 if (sim->devq == NULL) 4529 return(count); 4530 sim->devq->send_queue.qfrozen_cnt += count; 4531 if (sim->devq->active_dev != NULL) { 4532 struct ccb_hdr *ccbh; 4533 4534 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4535 ccb_hdr_tailq); 4536 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4537 ccbh->status = CAM_REQUEUE_REQ; 4538 } 4539 return (sim->devq->send_queue.qfrozen_cnt); 4540 } 4541 4542 /* 4543 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4544 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4545 * freed, which is not the case here), but the device queue is also freed XXX 4546 * and we have to check that here. 4547 * 4548 * XXX fixme: could we simply not null-out the device queue via 4549 * cam_sim_free()? 4550 */ 4551 static void 4552 xpt_release_devq_timeout(void *arg) 4553 { 4554 struct cam_ed *device; 4555 4556 device = (struct cam_ed *)arg; 4557 4558 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4559 } 4560 4561 void 4562 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4563 { 4564 xpt_release_devq_device(path->device, count, run_queue); 4565 } 4566 4567 static void 4568 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4569 { 4570 int rundevq; 4571 4572 rundevq = 0; 4573 crit_enter(); 4574 4575 if (dev->qfrozen_cnt > 0) { 4576 4577 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4578 dev->qfrozen_cnt -= count; 4579 if (dev->qfrozen_cnt == 0) { 4580 4581 /* 4582 * No longer need to wait for a successful 4583 * command completion. 4584 */ 4585 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4586 4587 /* 4588 * Remove any timeouts that might be scheduled 4589 * to release this queue. 4590 */ 4591 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4592 callout_stop(&dev->c_handle); 4593 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4594 } 4595 4596 /* 4597 * Now that we are unfrozen schedule the 4598 * device so any pending transactions are 4599 * run. 4600 */ 4601 if ((dev->ccbq.queue.entries > 0) 4602 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4603 && (run_queue != 0)) { 4604 rundevq = 1; 4605 } 4606 } 4607 } 4608 if (rundevq != 0) 4609 xpt_run_dev_sendq(dev->target->bus); 4610 crit_exit(); 4611 } 4612 4613 void 4614 xpt_release_simq(struct cam_sim *sim, int run_queue) 4615 { 4616 struct camq *sendq; 4617 4618 if (sim->devq == NULL) 4619 return; 4620 4621 sendq = &(sim->devq->send_queue); 4622 crit_enter(); 4623 4624 if (sendq->qfrozen_cnt > 0) { 4625 sendq->qfrozen_cnt--; 4626 if (sendq->qfrozen_cnt == 0) { 4627 struct cam_eb *bus; 4628 4629 /* 4630 * If there is a timeout scheduled to release this 4631 * sim queue, remove it. The queue frozen count is 4632 * already at 0. 4633 */ 4634 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4635 callout_stop(&sim->c_handle); 4636 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4637 } 4638 bus = xpt_find_bus(sim->path_id); 4639 crit_exit(); 4640 4641 if (run_queue) { 4642 /* 4643 * Now that we are unfrozen run the send queue. 4644 */ 4645 xpt_run_dev_sendq(bus); 4646 } 4647 xpt_release_bus(bus); 4648 } else { 4649 crit_exit(); 4650 } 4651 } else { 4652 crit_exit(); 4653 } 4654 } 4655 4656 void 4657 xpt_done(union ccb *done_ccb) 4658 { 4659 crit_enter(); 4660 4661 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4662 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4663 /* 4664 * Queue up the request for handling by our SWI handler 4665 * any of the "non-immediate" type of ccbs. 4666 */ 4667 switch (done_ccb->ccb_h.path->periph->type) { 4668 case CAM_PERIPH_BIO: 4669 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4670 sim_links.tqe); 4671 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4672 setsoftcambio(); 4673 break; 4674 case CAM_PERIPH_NET: 4675 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4676 sim_links.tqe); 4677 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4678 setsoftcamnet(); 4679 break; 4680 } 4681 } 4682 crit_exit(); 4683 } 4684 4685 union ccb * 4686 xpt_alloc_ccb(void) 4687 { 4688 union ccb *new_ccb; 4689 4690 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4691 return (new_ccb); 4692 } 4693 4694 void 4695 xpt_free_ccb(union ccb *free_ccb) 4696 { 4697 kfree(free_ccb, M_DEVBUF); 4698 } 4699 4700 4701 4702 /* Private XPT functions */ 4703 4704 /* 4705 * Get a CAM control block for the caller. Charge the structure to the device 4706 * referenced by the path. If the this device has no 'credits' then the 4707 * device already has the maximum number of outstanding operations under way 4708 * and we return NULL. If we don't have sufficient resources to allocate more 4709 * ccbs, we also return NULL. 4710 */ 4711 static union ccb * 4712 xpt_get_ccb(struct cam_ed *device) 4713 { 4714 union ccb *new_ccb; 4715 4716 crit_enter(); 4717 if ((new_ccb = (union ccb *)SLIST_FIRST(&ccb_freeq)) == NULL) { 4718 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4719 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4720 xpt_links.sle); 4721 xpt_ccb_count++; 4722 } 4723 cam_ccbq_take_opening(&device->ccbq); 4724 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4725 crit_exit(); 4726 return (new_ccb); 4727 } 4728 4729 static void 4730 xpt_release_bus(struct cam_eb *bus) 4731 { 4732 4733 crit_enter(); 4734 if (bus->refcount == 1) { 4735 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL); 4736 TAILQ_REMOVE(&xpt_busses, bus, links); 4737 if (bus->sim) { 4738 cam_sim_release(bus->sim, 0); 4739 bus->sim = NULL; 4740 } 4741 bus_generation++; 4742 KKASSERT(bus->refcount == 1); 4743 kfree(bus, M_DEVBUF); 4744 } else { 4745 --bus->refcount; 4746 } 4747 crit_exit(); 4748 } 4749 4750 static struct cam_et * 4751 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4752 { 4753 struct cam_et *target; 4754 struct cam_et *cur_target; 4755 4756 target = kmalloc(sizeof(*target), M_DEVBUF, M_INTWAIT); 4757 4758 TAILQ_INIT(&target->ed_entries); 4759 target->bus = bus; 4760 target->target_id = target_id; 4761 target->refcount = 1; 4762 target->generation = 0; 4763 timevalclear(&target->last_reset); 4764 /* 4765 * Hold a reference to our parent bus so it 4766 * will not go away before we do. 4767 */ 4768 bus->refcount++; 4769 4770 /* Insertion sort into our bus's target list */ 4771 cur_target = TAILQ_FIRST(&bus->et_entries); 4772 while (cur_target != NULL && cur_target->target_id < target_id) 4773 cur_target = TAILQ_NEXT(cur_target, links); 4774 4775 if (cur_target != NULL) { 4776 TAILQ_INSERT_BEFORE(cur_target, target, links); 4777 } else { 4778 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4779 } 4780 bus->generation++; 4781 return (target); 4782 } 4783 4784 static void 4785 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4786 { 4787 crit_enter(); 4788 if (target->refcount == 1) { 4789 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 4790 TAILQ_REMOVE(&bus->et_entries, target, links); 4791 bus->generation++; 4792 xpt_release_bus(bus); 4793 KKASSERT(target->refcount == 1); 4794 kfree(target, M_DEVBUF); 4795 } else { 4796 --target->refcount; 4797 } 4798 crit_exit(); 4799 } 4800 4801 static struct cam_ed * 4802 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4803 { 4804 #ifdef CAM_NEW_TRAN_CODE 4805 struct cam_path path; 4806 #endif /* CAM_NEW_TRAN_CODE */ 4807 struct cam_ed *device; 4808 struct cam_devq *devq; 4809 cam_status status; 4810 4811 /* Make space for us in the device queue on our bus */ 4812 if (bus->sim->devq == NULL) 4813 return(NULL); 4814 devq = bus->sim->devq; 4815 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4816 4817 if (status != CAM_REQ_CMP) { 4818 device = NULL; 4819 } else { 4820 device = kmalloc(sizeof(*device), M_DEVBUF, M_INTWAIT); 4821 } 4822 4823 if (device != NULL) { 4824 struct cam_ed *cur_device; 4825 4826 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4827 device->alloc_ccb_entry.device = device; 4828 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4829 device->send_ccb_entry.device = device; 4830 device->target = target; 4831 device->lun_id = lun_id; 4832 /* Initialize our queues */ 4833 if (camq_init(&device->drvq, 0) != 0) { 4834 kfree(device, M_DEVBUF); 4835 return (NULL); 4836 } 4837 if (cam_ccbq_init(&device->ccbq, 4838 bus->sim->max_dev_openings) != 0) { 4839 camq_fini(&device->drvq); 4840 kfree(device, M_DEVBUF); 4841 return (NULL); 4842 } 4843 SLIST_INIT(&device->asyncs); 4844 SLIST_INIT(&device->periphs); 4845 device->generation = 0; 4846 device->owner = NULL; 4847 /* 4848 * Take the default quirk entry until we have inquiry 4849 * data and can determine a better quirk to use. 4850 */ 4851 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4852 bzero(&device->inq_data, sizeof(device->inq_data)); 4853 device->inq_flags = 0; 4854 device->queue_flags = 0; 4855 device->serial_num = NULL; 4856 device->serial_num_len = 0; 4857 device->qfrozen_cnt = 0; 4858 device->flags = CAM_DEV_UNCONFIGURED; 4859 device->tag_delay_count = 0; 4860 device->refcount = 1; 4861 callout_init(&device->c_handle); 4862 4863 /* 4864 * Hold a reference to our parent target so it 4865 * will not go away before we do. 4866 */ 4867 target->refcount++; 4868 4869 /* 4870 * XXX should be limited by number of CCBs this bus can 4871 * do. 4872 */ 4873 xpt_max_ccbs += device->ccbq.devq_openings; 4874 /* Insertion sort into our target's device list */ 4875 cur_device = TAILQ_FIRST(&target->ed_entries); 4876 while (cur_device != NULL && cur_device->lun_id < lun_id) 4877 cur_device = TAILQ_NEXT(cur_device, links); 4878 if (cur_device != NULL) { 4879 TAILQ_INSERT_BEFORE(cur_device, device, links); 4880 } else { 4881 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4882 } 4883 target->generation++; 4884 #ifdef CAM_NEW_TRAN_CODE 4885 if (lun_id != CAM_LUN_WILDCARD) { 4886 xpt_compile_path(&path, 4887 NULL, 4888 bus->path_id, 4889 target->target_id, 4890 lun_id); 4891 xpt_devise_transport(&path); 4892 xpt_release_path(&path); 4893 } 4894 #endif /* CAM_NEW_TRAN_CODE */ 4895 } 4896 return (device); 4897 } 4898 4899 static void 4900 xpt_reference_device(struct cam_ed *device) 4901 { 4902 ++device->refcount; 4903 } 4904 4905 static void 4906 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4907 struct cam_ed *device) 4908 { 4909 struct cam_devq *devq; 4910 4911 crit_enter(); 4912 if (device->refcount == 1) { 4913 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 4914 4915 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4916 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4917 panic("Removing device while still queued for ccbs"); 4918 4919 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4920 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4921 callout_stop(&device->c_handle); 4922 } 4923 4924 TAILQ_REMOVE(&target->ed_entries, device,links); 4925 target->generation++; 4926 xpt_max_ccbs -= device->ccbq.devq_openings; 4927 /* Release our slot in the devq */ 4928 devq = bus->sim->devq; 4929 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4930 xpt_release_target(bus, target); 4931 KKASSERT(device->refcount == 1); 4932 kfree(device, M_DEVBUF); 4933 } else { 4934 --device->refcount; 4935 } 4936 crit_exit(); 4937 } 4938 4939 static u_int32_t 4940 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4941 { 4942 int diff; 4943 int result; 4944 struct cam_ed *dev; 4945 4946 dev = path->device; 4947 4948 crit_enter(); 4949 4950 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4951 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4952 if (result == CAM_REQ_CMP && (diff < 0)) { 4953 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4954 } 4955 /* Adjust the global limit */ 4956 xpt_max_ccbs += diff; 4957 crit_exit(); 4958 return (result); 4959 } 4960 4961 static struct cam_eb * 4962 xpt_find_bus(path_id_t path_id) 4963 { 4964 struct cam_eb *bus; 4965 4966 TAILQ_FOREACH(bus, &xpt_busses, links) { 4967 if (bus->path_id == path_id) { 4968 bus->refcount++; 4969 break; 4970 } 4971 } 4972 return (bus); 4973 } 4974 4975 static struct cam_et * 4976 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4977 { 4978 struct cam_et *target; 4979 4980 TAILQ_FOREACH(target, &bus->et_entries, links) { 4981 if (target->target_id == target_id) { 4982 target->refcount++; 4983 break; 4984 } 4985 } 4986 return (target); 4987 } 4988 4989 static struct cam_ed * 4990 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4991 { 4992 struct cam_ed *device; 4993 4994 TAILQ_FOREACH(device, &target->ed_entries, links) { 4995 if (device->lun_id == lun_id) { 4996 device->refcount++; 4997 break; 4998 } 4999 } 5000 return (device); 5001 } 5002 5003 typedef struct { 5004 union ccb *request_ccb; 5005 struct ccb_pathinq *cpi; 5006 int pending_count; 5007 } xpt_scan_bus_info; 5008 5009 /* 5010 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 5011 * As the scan progresses, xpt_scan_bus is used as the 5012 * callback on completion function. 5013 */ 5014 static void 5015 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5016 { 5017 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5018 ("xpt_scan_bus\n")); 5019 switch (request_ccb->ccb_h.func_code) { 5020 case XPT_SCAN_BUS: 5021 { 5022 xpt_scan_bus_info *scan_info; 5023 union ccb *work_ccb; 5024 struct cam_path *path; 5025 u_int i; 5026 u_int max_target; 5027 u_int initiator_id; 5028 5029 /* Find out the characteristics of the bus */ 5030 work_ccb = xpt_alloc_ccb(); 5031 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5032 request_ccb->ccb_h.pinfo.priority); 5033 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5034 xpt_action(work_ccb); 5035 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5036 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5037 xpt_free_ccb(work_ccb); 5038 xpt_done(request_ccb); 5039 return; 5040 } 5041 5042 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5043 /* 5044 * Can't scan the bus on an adapter that 5045 * cannot perform the initiator role. 5046 */ 5047 request_ccb->ccb_h.status = CAM_REQ_CMP; 5048 xpt_free_ccb(work_ccb); 5049 xpt_done(request_ccb); 5050 return; 5051 } 5052 5053 /* Save some state for use while we probe for devices */ 5054 scan_info = (xpt_scan_bus_info *) 5055 kmalloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT); 5056 scan_info->request_ccb = request_ccb; 5057 scan_info->cpi = &work_ccb->cpi; 5058 5059 /* Cache on our stack so we can work asynchronously */ 5060 max_target = scan_info->cpi->max_target; 5061 initiator_id = scan_info->cpi->initiator_id; 5062 5063 /* 5064 * Don't count the initiator if the 5065 * initiator is addressable. 5066 */ 5067 scan_info->pending_count = max_target + 1; 5068 if (initiator_id <= max_target) 5069 scan_info->pending_count--; 5070 5071 for (i = 0; i <= max_target; i++) { 5072 cam_status status; 5073 if (i == initiator_id) 5074 continue; 5075 5076 status = xpt_create_path(&path, xpt_periph, 5077 request_ccb->ccb_h.path_id, 5078 i, 0); 5079 if (status != CAM_REQ_CMP) { 5080 kprintf("xpt_scan_bus: xpt_create_path failed" 5081 " with status %#x, bus scan halted\n", 5082 status); 5083 break; 5084 } 5085 work_ccb = xpt_alloc_ccb(); 5086 xpt_setup_ccb(&work_ccb->ccb_h, path, 5087 request_ccb->ccb_h.pinfo.priority); 5088 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5089 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5090 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5091 work_ccb->crcn.flags = request_ccb->crcn.flags; 5092 xpt_action(work_ccb); 5093 } 5094 break; 5095 } 5096 case XPT_SCAN_LUN: 5097 { 5098 xpt_scan_bus_info *scan_info; 5099 path_id_t path_id; 5100 target_id_t target_id; 5101 lun_id_t lun_id; 5102 5103 /* Reuse the same CCB to query if a device was really found */ 5104 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5105 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5106 request_ccb->ccb_h.pinfo.priority); 5107 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5108 5109 path_id = request_ccb->ccb_h.path_id; 5110 target_id = request_ccb->ccb_h.target_id; 5111 lun_id = request_ccb->ccb_h.target_lun; 5112 xpt_action(request_ccb); 5113 5114 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5115 struct cam_ed *device; 5116 struct cam_et *target; 5117 int phl; 5118 5119 /* 5120 * If we already probed lun 0 successfully, or 5121 * we have additional configured luns on this 5122 * target that might have "gone away", go onto 5123 * the next lun. 5124 */ 5125 target = request_ccb->ccb_h.path->target; 5126 /* 5127 * We may touch devices that we don't 5128 * hold references too, so ensure they 5129 * don't disappear out from under us. 5130 * The target above is referenced by the 5131 * path in the request ccb. 5132 */ 5133 phl = 0; 5134 crit_enter(); 5135 device = TAILQ_FIRST(&target->ed_entries); 5136 if (device != NULL) { 5137 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 5138 if (device->lun_id == 0) 5139 device = TAILQ_NEXT(device, links); 5140 } 5141 crit_exit(); 5142 if ((lun_id != 0) || (device != NULL)) { 5143 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5144 lun_id++; 5145 } 5146 } else { 5147 struct cam_ed *device; 5148 5149 device = request_ccb->ccb_h.path->device; 5150 5151 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5152 /* Try the next lun */ 5153 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 5154 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 5155 lun_id++; 5156 } 5157 } 5158 5159 xpt_free_path(request_ccb->ccb_h.path); 5160 5161 /* Check Bounds */ 5162 if ((lun_id == request_ccb->ccb_h.target_lun) 5163 || lun_id > scan_info->cpi->max_lun) { 5164 /* We're done */ 5165 5166 xpt_free_ccb(request_ccb); 5167 scan_info->pending_count--; 5168 if (scan_info->pending_count == 0) { 5169 xpt_free_ccb((union ccb *)scan_info->cpi); 5170 request_ccb = scan_info->request_ccb; 5171 kfree(scan_info, M_TEMP); 5172 request_ccb->ccb_h.status = CAM_REQ_CMP; 5173 xpt_done(request_ccb); 5174 } 5175 } else { 5176 /* Try the next device */ 5177 struct cam_path *path; 5178 cam_status status; 5179 5180 path = request_ccb->ccb_h.path; 5181 status = xpt_create_path(&path, xpt_periph, 5182 path_id, target_id, lun_id); 5183 if (status != CAM_REQ_CMP) { 5184 kprintf("xpt_scan_bus: xpt_create_path failed " 5185 "with status %#x, halting LUN scan\n", 5186 status); 5187 xpt_free_ccb(request_ccb); 5188 scan_info->pending_count--; 5189 if (scan_info->pending_count == 0) { 5190 xpt_free_ccb( 5191 (union ccb *)scan_info->cpi); 5192 request_ccb = scan_info->request_ccb; 5193 kfree(scan_info, M_TEMP); 5194 request_ccb->ccb_h.status = CAM_REQ_CMP; 5195 xpt_done(request_ccb); 5196 break; 5197 } 5198 } 5199 xpt_setup_ccb(&request_ccb->ccb_h, path, 5200 request_ccb->ccb_h.pinfo.priority); 5201 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5202 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5203 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5204 request_ccb->crcn.flags = 5205 scan_info->request_ccb->crcn.flags; 5206 xpt_action(request_ccb); 5207 } 5208 break; 5209 } 5210 default: 5211 break; 5212 } 5213 } 5214 5215 typedef enum { 5216 PROBE_TUR, 5217 PROBE_INQUIRY, 5218 PROBE_FULL_INQUIRY, 5219 PROBE_MODE_SENSE, 5220 PROBE_SERIAL_NUM, 5221 PROBE_TUR_FOR_NEGOTIATION 5222 } probe_action; 5223 5224 typedef enum { 5225 PROBE_INQUIRY_CKSUM = 0x01, 5226 PROBE_SERIAL_CKSUM = 0x02, 5227 PROBE_NO_ANNOUNCE = 0x04 5228 } probe_flags; 5229 5230 typedef struct { 5231 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5232 probe_action action; 5233 union ccb saved_ccb; 5234 probe_flags flags; 5235 MD5_CTX context; 5236 u_int8_t digest[16]; 5237 } probe_softc; 5238 5239 static void 5240 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5241 cam_flags flags, union ccb *request_ccb) 5242 { 5243 struct ccb_pathinq cpi; 5244 cam_status status; 5245 struct cam_path *new_path; 5246 struct cam_periph *old_periph; 5247 5248 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5249 ("xpt_scan_lun\n")); 5250 5251 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5252 cpi.ccb_h.func_code = XPT_PATH_INQ; 5253 xpt_action((union ccb *)&cpi); 5254 5255 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5256 if (request_ccb != NULL) { 5257 request_ccb->ccb_h.status = cpi.ccb_h.status; 5258 xpt_done(request_ccb); 5259 } 5260 return; 5261 } 5262 5263 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5264 /* 5265 * Can't scan the bus on an adapter that 5266 * cannot perform the initiator role. 5267 */ 5268 if (request_ccb != NULL) { 5269 request_ccb->ccb_h.status = CAM_REQ_CMP; 5270 xpt_done(request_ccb); 5271 } 5272 return; 5273 } 5274 5275 if (request_ccb == NULL) { 5276 request_ccb = kmalloc(sizeof(union ccb), M_TEMP, M_INTWAIT); 5277 new_path = kmalloc(sizeof(*new_path), M_TEMP, M_INTWAIT); 5278 status = xpt_compile_path(new_path, xpt_periph, 5279 path->bus->path_id, 5280 path->target->target_id, 5281 path->device->lun_id); 5282 5283 if (status != CAM_REQ_CMP) { 5284 xpt_print_path(path); 5285 kprintf("xpt_scan_lun: can't compile path, can't " 5286 "continue\n"); 5287 kfree(request_ccb, M_TEMP); 5288 kfree(new_path, M_TEMP); 5289 return; 5290 } 5291 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5292 request_ccb->ccb_h.cbfcnp = xptscandone; 5293 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5294 request_ccb->crcn.flags = flags; 5295 } 5296 5297 crit_enter(); 5298 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5299 probe_softc *softc; 5300 5301 softc = (probe_softc *)old_periph->softc; 5302 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5303 periph_links.tqe); 5304 } else { 5305 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5306 probestart, "probe", 5307 CAM_PERIPH_BIO, 5308 request_ccb->ccb_h.path, NULL, 0, 5309 request_ccb); 5310 5311 if (status != CAM_REQ_CMP) { 5312 xpt_print_path(path); 5313 kprintf("xpt_scan_lun: cam_alloc_periph returned an " 5314 "error, can't continue probe\n"); 5315 request_ccb->ccb_h.status = status; 5316 xpt_done(request_ccb); 5317 } 5318 } 5319 crit_exit(); 5320 } 5321 5322 static void 5323 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5324 { 5325 xpt_release_path(done_ccb->ccb_h.path); 5326 kfree(done_ccb->ccb_h.path, M_TEMP); 5327 kfree(done_ccb, M_TEMP); 5328 } 5329 5330 static cam_status 5331 proberegister(struct cam_periph *periph, void *arg) 5332 { 5333 union ccb *request_ccb; /* CCB representing the probe request */ 5334 probe_softc *softc; 5335 5336 request_ccb = (union ccb *)arg; 5337 if (periph == NULL) { 5338 kprintf("proberegister: periph was NULL!!\n"); 5339 return(CAM_REQ_CMP_ERR); 5340 } 5341 5342 if (request_ccb == NULL) { 5343 kprintf("proberegister: no probe CCB, " 5344 "can't register device\n"); 5345 return(CAM_REQ_CMP_ERR); 5346 } 5347 5348 softc = kmalloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO); 5349 TAILQ_INIT(&softc->request_ccbs); 5350 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5351 periph_links.tqe); 5352 softc->flags = 0; 5353 periph->softc = softc; 5354 cam_periph_acquire(periph); 5355 /* 5356 * Ensure we've waited at least a bus settle 5357 * delay before attempting to probe the device. 5358 * For HBAs that don't do bus resets, this won't make a difference. 5359 */ 5360 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5361 scsi_delay); 5362 probeschedule(periph); 5363 return(CAM_REQ_CMP); 5364 } 5365 5366 static void 5367 probeschedule(struct cam_periph *periph) 5368 { 5369 struct ccb_pathinq cpi; 5370 union ccb *ccb; 5371 probe_softc *softc; 5372 5373 softc = (probe_softc *)periph->softc; 5374 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5375 5376 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5377 cpi.ccb_h.func_code = XPT_PATH_INQ; 5378 xpt_action((union ccb *)&cpi); 5379 5380 /* 5381 * If a device has gone away and another device, or the same one, 5382 * is back in the same place, it should have a unit attention 5383 * condition pending. It will not report the unit attention in 5384 * response to an inquiry, which may leave invalid transfer 5385 * negotiations in effect. The TUR will reveal the unit attention 5386 * condition. Only send the TUR for lun 0, since some devices 5387 * will get confused by commands other than inquiry to non-existent 5388 * luns. If you think a device has gone away start your scan from 5389 * lun 0. This will insure that any bogus transfer settings are 5390 * invalidated. 5391 * 5392 * If we haven't seen the device before and the controller supports 5393 * some kind of transfer negotiation, negotiate with the first 5394 * sent command if no bus reset was performed at startup. This 5395 * ensures that the device is not confused by transfer negotiation 5396 * settings left over by loader or BIOS action. 5397 */ 5398 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5399 && (ccb->ccb_h.target_lun == 0)) { 5400 softc->action = PROBE_TUR; 5401 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5402 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5403 proberequestdefaultnegotiation(periph); 5404 softc->action = PROBE_INQUIRY; 5405 } else { 5406 softc->action = PROBE_INQUIRY; 5407 } 5408 5409 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5410 softc->flags |= PROBE_NO_ANNOUNCE; 5411 else 5412 softc->flags &= ~PROBE_NO_ANNOUNCE; 5413 5414 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5415 } 5416 5417 static void 5418 probestart(struct cam_periph *periph, union ccb *start_ccb) 5419 { 5420 /* Probe the device that our peripheral driver points to */ 5421 struct ccb_scsiio *csio; 5422 probe_softc *softc; 5423 5424 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5425 5426 softc = (probe_softc *)periph->softc; 5427 csio = &start_ccb->csio; 5428 5429 switch (softc->action) { 5430 case PROBE_TUR: 5431 case PROBE_TUR_FOR_NEGOTIATION: 5432 { 5433 scsi_test_unit_ready(csio, 5434 /*retries*/4, 5435 probedone, 5436 MSG_SIMPLE_Q_TAG, 5437 SSD_FULL_SIZE, 5438 /*timeout*/60000); 5439 break; 5440 } 5441 case PROBE_INQUIRY: 5442 case PROBE_FULL_INQUIRY: 5443 { 5444 u_int inquiry_len; 5445 struct scsi_inquiry_data *inq_buf; 5446 5447 inq_buf = &periph->path->device->inq_data; 5448 /* 5449 * If the device is currently configured, we calculate an 5450 * MD5 checksum of the inquiry data, and if the serial number 5451 * length is greater than 0, add the serial number data 5452 * into the checksum as well. Once the inquiry and the 5453 * serial number check finish, we attempt to figure out 5454 * whether we still have the same device. 5455 */ 5456 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5457 5458 MD5Init(&softc->context); 5459 MD5Update(&softc->context, (unsigned char *)inq_buf, 5460 sizeof(struct scsi_inquiry_data)); 5461 softc->flags |= PROBE_INQUIRY_CKSUM; 5462 if (periph->path->device->serial_num_len > 0) { 5463 MD5Update(&softc->context, 5464 periph->path->device->serial_num, 5465 periph->path->device->serial_num_len); 5466 softc->flags |= PROBE_SERIAL_CKSUM; 5467 } 5468 MD5Final(softc->digest, &softc->context); 5469 } 5470 5471 if (softc->action == PROBE_INQUIRY) 5472 inquiry_len = SHORT_INQUIRY_LENGTH; 5473 else 5474 inquiry_len = inq_buf->additional_length + 5; 5475 5476 scsi_inquiry(csio, 5477 /*retries*/4, 5478 probedone, 5479 MSG_SIMPLE_Q_TAG, 5480 (u_int8_t *)inq_buf, 5481 inquiry_len, 5482 /*evpd*/FALSE, 5483 /*page_code*/0, 5484 SSD_MIN_SIZE, 5485 /*timeout*/60 * 1000); 5486 break; 5487 } 5488 case PROBE_MODE_SENSE: 5489 { 5490 void *mode_buf; 5491 int mode_buf_len; 5492 5493 mode_buf_len = sizeof(struct scsi_mode_header_6) 5494 + sizeof(struct scsi_mode_blk_desc) 5495 + sizeof(struct scsi_control_page); 5496 mode_buf = kmalloc(mode_buf_len, M_TEMP, M_INTWAIT); 5497 scsi_mode_sense(csio, 5498 /*retries*/4, 5499 probedone, 5500 MSG_SIMPLE_Q_TAG, 5501 /*dbd*/FALSE, 5502 SMS_PAGE_CTRL_CURRENT, 5503 SMS_CONTROL_MODE_PAGE, 5504 mode_buf, 5505 mode_buf_len, 5506 SSD_FULL_SIZE, 5507 /*timeout*/60000); 5508 break; 5509 } 5510 case PROBE_SERIAL_NUM: 5511 { 5512 struct scsi_vpd_unit_serial_number *serial_buf; 5513 struct cam_ed* device; 5514 5515 serial_buf = NULL; 5516 device = periph->path->device; 5517 device->serial_num = NULL; 5518 device->serial_num_len = 0; 5519 5520 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5521 serial_buf = kmalloc(sizeof(*serial_buf), M_TEMP, 5522 M_INTWAIT | M_ZERO); 5523 scsi_inquiry(csio, 5524 /*retries*/4, 5525 probedone, 5526 MSG_SIMPLE_Q_TAG, 5527 (u_int8_t *)serial_buf, 5528 sizeof(*serial_buf), 5529 /*evpd*/TRUE, 5530 SVPD_UNIT_SERIAL_NUMBER, 5531 SSD_MIN_SIZE, 5532 /*timeout*/60 * 1000); 5533 break; 5534 } 5535 /* 5536 * We'll have to do without, let our probedone 5537 * routine finish up for us. 5538 */ 5539 start_ccb->csio.data_ptr = NULL; 5540 probedone(periph, start_ccb); 5541 return; 5542 } 5543 } 5544 xpt_action(start_ccb); 5545 } 5546 5547 static void 5548 proberequestdefaultnegotiation(struct cam_periph *periph) 5549 { 5550 struct ccb_trans_settings cts; 5551 5552 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5553 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5554 #ifdef CAM_NEW_TRAN_CODE 5555 cts.type = CTS_TYPE_USER_SETTINGS; 5556 #else /* CAM_NEW_TRAN_CODE */ 5557 cts.flags = CCB_TRANS_USER_SETTINGS; 5558 #endif /* CAM_NEW_TRAN_CODE */ 5559 xpt_action((union ccb *)&cts); 5560 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5561 #ifdef CAM_NEW_TRAN_CODE 5562 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5563 #else /* CAM_NEW_TRAN_CODE */ 5564 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5565 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5566 #endif /* CAM_NEW_TRAN_CODE */ 5567 xpt_action((union ccb *)&cts); 5568 } 5569 5570 static void 5571 probedone(struct cam_periph *periph, union ccb *done_ccb) 5572 { 5573 probe_softc *softc; 5574 struct cam_path *path; 5575 u_int32_t priority; 5576 5577 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5578 5579 softc = (probe_softc *)periph->softc; 5580 path = done_ccb->ccb_h.path; 5581 priority = done_ccb->ccb_h.pinfo.priority; 5582 5583 switch (softc->action) { 5584 case PROBE_TUR: 5585 { 5586 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5587 5588 if (cam_periph_error(done_ccb, 0, 5589 SF_NO_PRINT, NULL) == ERESTART) 5590 return; 5591 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5592 /* Don't wedge the queue */ 5593 xpt_release_devq(done_ccb->ccb_h.path, 5594 /*count*/1, 5595 /*run_queue*/TRUE); 5596 } 5597 softc->action = PROBE_INQUIRY; 5598 xpt_release_ccb(done_ccb); 5599 xpt_schedule(periph, priority); 5600 return; 5601 } 5602 case PROBE_INQUIRY: 5603 case PROBE_FULL_INQUIRY: 5604 { 5605 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5606 struct scsi_inquiry_data *inq_buf; 5607 u_int8_t periph_qual; 5608 5609 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5610 inq_buf = &path->device->inq_data; 5611 5612 periph_qual = SID_QUAL(inq_buf); 5613 5614 switch(periph_qual) { 5615 case SID_QUAL_LU_CONNECTED: 5616 { 5617 u_int8_t alen; 5618 5619 /* 5620 * We conservatively request only 5621 * SHORT_INQUIRY_LEN bytes of inquiry 5622 * information during our first try 5623 * at sending an INQUIRY. If the device 5624 * has more information to give, 5625 * perform a second request specifying 5626 * the amount of information the device 5627 * is willing to give. 5628 */ 5629 alen = inq_buf->additional_length; 5630 if (softc->action == PROBE_INQUIRY 5631 && alen > (SHORT_INQUIRY_LENGTH - 5)) { 5632 softc->action = PROBE_FULL_INQUIRY; 5633 xpt_release_ccb(done_ccb); 5634 xpt_schedule(periph, priority); 5635 return; 5636 } 5637 5638 xpt_find_quirk(path->device); 5639 5640 #ifdef CAM_NEW_TRAN_CODE 5641 xpt_devise_transport(path); 5642 #endif /* CAM_NEW_TRAN_CODE */ 5643 if ((inq_buf->flags & SID_CmdQue) != 0) 5644 softc->action = PROBE_MODE_SENSE; 5645 else 5646 softc->action = PROBE_SERIAL_NUM; 5647 5648 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5649 xpt_reference_device(path->device); 5650 5651 xpt_release_ccb(done_ccb); 5652 xpt_schedule(periph, priority); 5653 return; 5654 } 5655 default: 5656 break; 5657 } 5658 } else if (cam_periph_error(done_ccb, 0, 5659 done_ccb->ccb_h.target_lun > 0 5660 ? SF_RETRY_UA|SF_QUIET_IR 5661 : SF_RETRY_UA, 5662 &softc->saved_ccb) == ERESTART) { 5663 return; 5664 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5665 /* Don't wedge the queue */ 5666 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5667 /*run_queue*/TRUE); 5668 } 5669 /* 5670 * If we get to this point, we got an error status back 5671 * from the inquiry and the error status doesn't require 5672 * automatically retrying the command. Therefore, the 5673 * inquiry failed. If we had inquiry information before 5674 * for this device, but this latest inquiry command failed, 5675 * the device has probably gone away. If this device isn't 5676 * already marked unconfigured, notify the peripheral 5677 * drivers that this device is no more. 5678 */ 5679 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5680 /* Send the async notification. */ 5681 xpt_async(AC_LOST_DEVICE, path, NULL); 5682 } 5683 5684 xpt_release_ccb(done_ccb); 5685 break; 5686 } 5687 case PROBE_MODE_SENSE: 5688 { 5689 struct ccb_scsiio *csio; 5690 struct scsi_mode_header_6 *mode_hdr; 5691 5692 csio = &done_ccb->csio; 5693 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5694 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5695 struct scsi_control_page *page; 5696 u_int8_t *offset; 5697 5698 offset = ((u_int8_t *)&mode_hdr[1]) 5699 + mode_hdr->blk_desc_len; 5700 page = (struct scsi_control_page *)offset; 5701 path->device->queue_flags = page->queue_flags; 5702 } else if (cam_periph_error(done_ccb, 0, 5703 SF_RETRY_UA|SF_NO_PRINT, 5704 &softc->saved_ccb) == ERESTART) { 5705 return; 5706 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5707 /* Don't wedge the queue */ 5708 xpt_release_devq(done_ccb->ccb_h.path, 5709 /*count*/1, /*run_queue*/TRUE); 5710 } 5711 xpt_release_ccb(done_ccb); 5712 kfree(mode_hdr, M_TEMP); 5713 softc->action = PROBE_SERIAL_NUM; 5714 xpt_schedule(periph, priority); 5715 return; 5716 } 5717 case PROBE_SERIAL_NUM: 5718 { 5719 struct ccb_scsiio *csio; 5720 struct scsi_vpd_unit_serial_number *serial_buf; 5721 u_int32_t priority; 5722 int changed; 5723 int have_serialnum; 5724 5725 changed = 1; 5726 have_serialnum = 0; 5727 csio = &done_ccb->csio; 5728 priority = done_ccb->ccb_h.pinfo.priority; 5729 serial_buf = 5730 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5731 5732 /* Clean up from previous instance of this device */ 5733 if (path->device->serial_num != NULL) { 5734 kfree(path->device->serial_num, M_DEVBUF); 5735 path->device->serial_num = NULL; 5736 path->device->serial_num_len = 0; 5737 } 5738 5739 if (serial_buf == NULL) { 5740 /* 5741 * Don't process the command as it was never sent 5742 */ 5743 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5744 && (serial_buf->length > 0)) { 5745 5746 have_serialnum = 1; 5747 path->device->serial_num = 5748 kmalloc((serial_buf->length + 1), 5749 M_DEVBUF, M_INTWAIT); 5750 bcopy(serial_buf->serial_num, 5751 path->device->serial_num, 5752 serial_buf->length); 5753 path->device->serial_num_len = serial_buf->length; 5754 path->device->serial_num[serial_buf->length] = '\0'; 5755 } else if (cam_periph_error(done_ccb, 0, 5756 SF_RETRY_UA|SF_NO_PRINT, 5757 &softc->saved_ccb) == ERESTART) { 5758 return; 5759 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5760 /* Don't wedge the queue */ 5761 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5762 /*run_queue*/TRUE); 5763 } 5764 5765 /* 5766 * Let's see if we have seen this device before. 5767 */ 5768 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5769 MD5_CTX context; 5770 u_int8_t digest[16]; 5771 5772 MD5Init(&context); 5773 5774 MD5Update(&context, 5775 (unsigned char *)&path->device->inq_data, 5776 sizeof(struct scsi_inquiry_data)); 5777 5778 if (have_serialnum) 5779 MD5Update(&context, serial_buf->serial_num, 5780 serial_buf->length); 5781 5782 MD5Final(digest, &context); 5783 if (bcmp(softc->digest, digest, 16) == 0) 5784 changed = 0; 5785 5786 /* 5787 * XXX Do we need to do a TUR in order to ensure 5788 * that the device really hasn't changed??? 5789 */ 5790 if ((changed != 0) 5791 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5792 xpt_async(AC_LOST_DEVICE, path, NULL); 5793 } 5794 if (serial_buf != NULL) 5795 kfree(serial_buf, M_TEMP); 5796 5797 if (changed != 0) { 5798 /* 5799 * Now that we have all the necessary 5800 * information to safely perform transfer 5801 * negotiations... Controllers don't perform 5802 * any negotiation or tagged queuing until 5803 * after the first XPT_SET_TRAN_SETTINGS ccb is 5804 * received. So, on a new device, just retreive 5805 * the user settings, and set them as the current 5806 * settings to set the device up. 5807 */ 5808 proberequestdefaultnegotiation(periph); 5809 xpt_release_ccb(done_ccb); 5810 5811 /* 5812 * Perform a TUR to allow the controller to 5813 * perform any necessary transfer negotiation. 5814 */ 5815 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5816 xpt_schedule(periph, priority); 5817 return; 5818 } 5819 xpt_release_ccb(done_ccb); 5820 break; 5821 } 5822 case PROBE_TUR_FOR_NEGOTIATION: 5823 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5824 /* Don't wedge the queue */ 5825 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5826 /*run_queue*/TRUE); 5827 } 5828 5829 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5830 xpt_reference_device(path->device); 5831 5832 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5833 /* Inform the XPT that a new device has been found */ 5834 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5835 xpt_action(done_ccb); 5836 5837 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5838 } 5839 xpt_release_ccb(done_ccb); 5840 break; 5841 } 5842 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5843 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5844 done_ccb->ccb_h.status = CAM_REQ_CMP; 5845 xpt_done(done_ccb); 5846 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5847 cam_periph_invalidate(periph); 5848 cam_periph_release(periph); 5849 } else { 5850 probeschedule(periph); 5851 } 5852 } 5853 5854 static void 5855 probecleanup(struct cam_periph *periph) 5856 { 5857 kfree(periph->softc, M_TEMP); 5858 } 5859 5860 static void 5861 xpt_find_quirk(struct cam_ed *device) 5862 { 5863 caddr_t match; 5864 5865 match = cam_quirkmatch((caddr_t)&device->inq_data, 5866 (caddr_t)xpt_quirk_table, 5867 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5868 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5869 5870 if (match == NULL) 5871 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5872 5873 device->quirk = (struct xpt_quirk_entry *)match; 5874 } 5875 5876 #ifdef CAM_NEW_TRAN_CODE 5877 5878 static void 5879 xpt_devise_transport(struct cam_path *path) 5880 { 5881 struct ccb_pathinq cpi; 5882 struct ccb_trans_settings cts; 5883 struct scsi_inquiry_data *inq_buf; 5884 5885 /* Get transport information from the SIM */ 5886 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5887 cpi.ccb_h.func_code = XPT_PATH_INQ; 5888 xpt_action((union ccb *)&cpi); 5889 5890 inq_buf = NULL; 5891 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 5892 inq_buf = &path->device->inq_data; 5893 path->device->protocol = PROTO_SCSI; 5894 path->device->protocol_version = 5895 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 5896 path->device->transport = cpi.transport; 5897 path->device->transport_version = cpi.transport_version; 5898 5899 /* 5900 * Any device not using SPI3 features should 5901 * be considered SPI2 or lower. 5902 */ 5903 if (inq_buf != NULL) { 5904 if (path->device->transport == XPORT_SPI 5905 && (inq_buf->spi3data & SID_SPI_MASK) == 0 5906 && path->device->transport_version > 2) 5907 path->device->transport_version = 2; 5908 } else { 5909 struct cam_ed* otherdev; 5910 5911 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 5912 otherdev != NULL; 5913 otherdev = TAILQ_NEXT(otherdev, links)) { 5914 if (otherdev != path->device) 5915 break; 5916 } 5917 5918 if (otherdev != NULL) { 5919 /* 5920 * Initially assume the same versioning as 5921 * prior luns for this target. 5922 */ 5923 path->device->protocol_version = 5924 otherdev->protocol_version; 5925 path->device->transport_version = 5926 otherdev->transport_version; 5927 } else { 5928 /* Until we know better, opt for safty */ 5929 path->device->protocol_version = 2; 5930 if (path->device->transport == XPORT_SPI) 5931 path->device->transport_version = 2; 5932 else 5933 path->device->transport_version = 0; 5934 } 5935 } 5936 5937 /* 5938 * XXX 5939 * For a device compliant with SPC-2 we should be able 5940 * to determine the transport version supported by 5941 * scrutinizing the version descriptors in the 5942 * inquiry buffer. 5943 */ 5944 5945 /* Tell the controller what we think */ 5946 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 5947 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5948 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5949 cts.transport = path->device->transport; 5950 cts.transport_version = path->device->transport_version; 5951 cts.protocol = path->device->protocol; 5952 cts.protocol_version = path->device->protocol_version; 5953 cts.proto_specific.valid = 0; 5954 cts.xport_specific.valid = 0; 5955 xpt_action((union ccb *)&cts); 5956 } 5957 5958 static void 5959 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5960 int async_update) 5961 { 5962 struct ccb_pathinq cpi; 5963 struct ccb_trans_settings cur_cts; 5964 struct ccb_trans_settings_scsi *scsi; 5965 struct ccb_trans_settings_scsi *cur_scsi; 5966 struct cam_sim *sim; 5967 struct scsi_inquiry_data *inq_data; 5968 5969 if (device == NULL) { 5970 cts->ccb_h.status = CAM_PATH_INVALID; 5971 xpt_done((union ccb *)cts); 5972 return; 5973 } 5974 5975 if (cts->protocol == PROTO_UNKNOWN 5976 || cts->protocol == PROTO_UNSPECIFIED) { 5977 cts->protocol = device->protocol; 5978 cts->protocol_version = device->protocol_version; 5979 } 5980 5981 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 5982 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 5983 cts->protocol_version = device->protocol_version; 5984 5985 if (cts->protocol != device->protocol) { 5986 xpt_print_path(cts->ccb_h.path); 5987 printf("Uninitialized Protocol %x:%x?\n", 5988 cts->protocol, device->protocol); 5989 cts->protocol = device->protocol; 5990 } 5991 5992 if (cts->protocol_version > device->protocol_version) { 5993 if (bootverbose) { 5994 xpt_print_path(cts->ccb_h.path); 5995 printf("Down reving Protocol Version from %d to %d?\n", 5996 cts->protocol_version, device->protocol_version); 5997 } 5998 cts->protocol_version = device->protocol_version; 5999 } 6000 6001 if (cts->transport == XPORT_UNKNOWN 6002 || cts->transport == XPORT_UNSPECIFIED) { 6003 cts->transport = device->transport; 6004 cts->transport_version = device->transport_version; 6005 } 6006 6007 if (cts->transport_version == XPORT_VERSION_UNKNOWN 6008 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 6009 cts->transport_version = device->transport_version; 6010 6011 if (cts->transport != device->transport) { 6012 xpt_print_path(cts->ccb_h.path); 6013 printf("Uninitialized Transport %x:%x?\n", 6014 cts->transport, device->transport); 6015 cts->transport = device->transport; 6016 } 6017 6018 if (cts->transport_version > device->transport_version) { 6019 if (bootverbose) { 6020 xpt_print_path(cts->ccb_h.path); 6021 printf("Down reving Transport Version from %d to %d?\n", 6022 cts->transport_version, 6023 device->transport_version); 6024 } 6025 cts->transport_version = device->transport_version; 6026 } 6027 6028 sim = cts->ccb_h.path->bus->sim; 6029 6030 /* 6031 * Nothing more of interest to do unless 6032 * this is a device connected via the 6033 * SCSI protocol. 6034 */ 6035 if (cts->protocol != PROTO_SCSI) { 6036 if (async_update == FALSE) 6037 (*(sim->sim_action))(sim, (union ccb *)cts); 6038 return; 6039 } 6040 6041 inq_data = &device->inq_data; 6042 scsi = &cts->proto_specific.scsi; 6043 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6044 cpi.ccb_h.func_code = XPT_PATH_INQ; 6045 xpt_action((union ccb *)&cpi); 6046 6047 /* SCSI specific sanity checking */ 6048 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6049 || (inq_data->flags & SID_CmdQue) == 0 6050 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6051 || (device->quirk->mintags == 0)) { 6052 /* 6053 * Can't tag on hardware that doesn't support tags, 6054 * doesn't have it enabled, or has broken tag support. 6055 */ 6056 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6057 } 6058 6059 if (async_update == FALSE) { 6060 /* 6061 * Perform sanity checking against what the 6062 * controller and device can do. 6063 */ 6064 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6065 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6066 cur_cts.type = cts->type; 6067 xpt_action((union ccb *)&cur_cts); 6068 6069 cur_scsi = &cur_cts.proto_specific.scsi; 6070 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6071 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6072 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6073 } 6074 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6075 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6076 } 6077 6078 /* SPI specific sanity checking */ 6079 if (cts->transport == XPORT_SPI && async_update == FALSE) { 6080 u_int spi3caps; 6081 struct ccb_trans_settings_spi *spi; 6082 struct ccb_trans_settings_spi *cur_spi; 6083 6084 spi = &cts->xport_specific.spi; 6085 6086 cur_spi = &cur_cts.xport_specific.spi; 6087 6088 /* Fill in any gaps in what the user gave us */ 6089 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6090 spi->sync_period = cur_spi->sync_period; 6091 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6092 spi->sync_period = 0; 6093 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6094 spi->sync_offset = cur_spi->sync_offset; 6095 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6096 spi->sync_offset = 0; 6097 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6098 spi->ppr_options = cur_spi->ppr_options; 6099 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6100 spi->ppr_options = 0; 6101 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6102 spi->bus_width = cur_spi->bus_width; 6103 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6104 spi->bus_width = 0; 6105 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6106 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6107 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6108 } 6109 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6110 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6111 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6112 && (inq_data->flags & SID_Sync) == 0 6113 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6114 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6115 || (cur_spi->sync_offset == 0) 6116 || (cur_spi->sync_period == 0)) { 6117 /* Force async */ 6118 spi->sync_period = 0; 6119 spi->sync_offset = 0; 6120 } 6121 6122 switch (spi->bus_width) { 6123 case MSG_EXT_WDTR_BUS_32_BIT: 6124 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6125 || (inq_data->flags & SID_WBus32) != 0 6126 || cts->type == CTS_TYPE_USER_SETTINGS) 6127 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6128 break; 6129 /* Fall Through to 16-bit */ 6130 case MSG_EXT_WDTR_BUS_16_BIT: 6131 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6132 || (inq_data->flags & SID_WBus16) != 0 6133 || cts->type == CTS_TYPE_USER_SETTINGS) 6134 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6135 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6136 break; 6137 } 6138 /* Fall Through to 8-bit */ 6139 default: /* New bus width?? */ 6140 case MSG_EXT_WDTR_BUS_8_BIT: 6141 /* All targets can do this */ 6142 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6143 break; 6144 } 6145 6146 spi3caps = cpi.xport_specific.spi.ppr_options; 6147 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6148 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6149 spi3caps &= inq_data->spi3data; 6150 6151 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6152 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6153 6154 if ((spi3caps & SID_SPI_IUS) == 0) 6155 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6156 6157 if ((spi3caps & SID_SPI_QAS) == 0) 6158 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6159 6160 /* No SPI Transfer settings are allowed unless we are wide */ 6161 if (spi->bus_width == 0) 6162 spi->ppr_options = 0; 6163 6164 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { 6165 /* 6166 * Can't tag queue without disconnection. 6167 */ 6168 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6169 scsi->valid |= CTS_SCSI_VALID_TQ; 6170 } 6171 6172 /* 6173 * If we are currently performing tagged transactions to 6174 * this device and want to change its negotiation parameters, 6175 * go non-tagged for a bit to give the controller a chance to 6176 * negotiate unhampered by tag messages. 6177 */ 6178 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6179 && (device->inq_flags & SID_CmdQue) != 0 6180 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6181 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6182 CTS_SPI_VALID_SYNC_OFFSET| 6183 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6184 xpt_toggle_tags(cts->ccb_h.path); 6185 } 6186 6187 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6188 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6189 int device_tagenb; 6190 6191 /* 6192 * If we are transitioning from tags to no-tags or 6193 * vice-versa, we need to carefully freeze and restart 6194 * the queue so that we don't overlap tagged and non-tagged 6195 * commands. We also temporarily stop tags if there is 6196 * a change in transfer negotiation settings to allow 6197 * "tag-less" negotiation. 6198 */ 6199 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6200 || (device->inq_flags & SID_CmdQue) != 0) 6201 device_tagenb = TRUE; 6202 else 6203 device_tagenb = FALSE; 6204 6205 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6206 && device_tagenb == FALSE) 6207 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6208 && device_tagenb == TRUE)) { 6209 6210 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6211 /* 6212 * Delay change to use tags until after a 6213 * few commands have gone to this device so 6214 * the controller has time to perform transfer 6215 * negotiations without tagged messages getting 6216 * in the way. 6217 */ 6218 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6219 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6220 } else { 6221 struct ccb_relsim crs; 6222 6223 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6224 device->inq_flags &= ~SID_CmdQue; 6225 xpt_dev_ccbq_resize(cts->ccb_h.path, 6226 sim->max_dev_openings); 6227 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6228 device->tag_delay_count = 0; 6229 6230 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6231 /*priority*/1); 6232 crs.ccb_h.func_code = XPT_REL_SIMQ; 6233 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6234 crs.openings 6235 = crs.release_timeout 6236 = crs.qfrozen_cnt 6237 = 0; 6238 xpt_action((union ccb *)&crs); 6239 } 6240 } 6241 } 6242 if (async_update == FALSE) 6243 (*(sim->sim_action))(sim, (union ccb *)cts); 6244 } 6245 6246 #else /* CAM_NEW_TRAN_CODE */ 6247 6248 static void 6249 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6250 int async_update) 6251 { 6252 struct cam_sim *sim; 6253 int qfrozen; 6254 6255 sim = cts->ccb_h.path->bus->sim; 6256 if (async_update == FALSE) { 6257 struct scsi_inquiry_data *inq_data; 6258 struct ccb_pathinq cpi; 6259 struct ccb_trans_settings cur_cts; 6260 6261 if (device == NULL) { 6262 cts->ccb_h.status = CAM_PATH_INVALID; 6263 xpt_done((union ccb *)cts); 6264 return; 6265 } 6266 6267 /* 6268 * Perform sanity checking against what the 6269 * controller and device can do. 6270 */ 6271 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6272 cpi.ccb_h.func_code = XPT_PATH_INQ; 6273 xpt_action((union ccb *)&cpi); 6274 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6275 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6276 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 6277 xpt_action((union ccb *)&cur_cts); 6278 inq_data = &device->inq_data; 6279 6280 /* Fill in any gaps in what the user gave us */ 6281 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 6282 cts->sync_period = cur_cts.sync_period; 6283 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 6284 cts->sync_offset = cur_cts.sync_offset; 6285 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 6286 cts->bus_width = cur_cts.bus_width; 6287 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 6288 cts->flags &= ~CCB_TRANS_DISC_ENB; 6289 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 6290 } 6291 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 6292 cts->flags &= ~CCB_TRANS_TAG_ENB; 6293 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 6294 } 6295 6296 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6297 && (inq_data->flags & SID_Sync) == 0) 6298 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6299 || (cts->sync_offset == 0) 6300 || (cts->sync_period == 0)) { 6301 /* Force async */ 6302 cts->sync_period = 0; 6303 cts->sync_offset = 0; 6304 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) { 6305 6306 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 6307 && cts->sync_period <= 0x9) { 6308 /* 6309 * Don't allow DT transmission rates if the 6310 * device does not support it. 6311 */ 6312 cts->sync_period = 0xa; 6313 } 6314 if ((inq_data->spi3data & SID_SPI_IUS) == 0 6315 && cts->sync_period <= 0x8) { 6316 /* 6317 * Don't allow PACE transmission rates 6318 * if the device does support packetized 6319 * transfers. 6320 */ 6321 cts->sync_period = 0x9; 6322 } 6323 } 6324 6325 switch (cts->bus_width) { 6326 case MSG_EXT_WDTR_BUS_32_BIT: 6327 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6328 || (inq_data->flags & SID_WBus32) != 0) 6329 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6330 break; 6331 /* Fall Through to 16-bit */ 6332 case MSG_EXT_WDTR_BUS_16_BIT: 6333 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6334 || (inq_data->flags & SID_WBus16) != 0) 6335 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6336 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6337 break; 6338 } 6339 /* Fall Through to 8-bit */ 6340 default: /* New bus width?? */ 6341 case MSG_EXT_WDTR_BUS_8_BIT: 6342 /* All targets can do this */ 6343 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6344 break; 6345 } 6346 6347 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 6348 /* 6349 * Can't tag queue without disconnection. 6350 */ 6351 cts->flags &= ~CCB_TRANS_TAG_ENB; 6352 cts->valid |= CCB_TRANS_TQ_VALID; 6353 } 6354 6355 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6356 || (inq_data->flags & SID_CmdQue) == 0 6357 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6358 || (device->quirk->mintags == 0)) { 6359 /* 6360 * Can't tag on hardware that doesn't support, 6361 * doesn't have it enabled, or has broken tag support. 6362 */ 6363 cts->flags &= ~CCB_TRANS_TAG_ENB; 6364 } 6365 } 6366 6367 qfrozen = FALSE; 6368 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 6369 int device_tagenb; 6370 6371 /* 6372 * If we are transitioning from tags to no-tags or 6373 * vice-versa, we need to carefully freeze and restart 6374 * the queue so that we don't overlap tagged and non-tagged 6375 * commands. We also temporarily stop tags if there is 6376 * a change in transfer negotiation settings to allow 6377 * "tag-less" negotiation. 6378 */ 6379 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6380 || (device->inq_flags & SID_CmdQue) != 0) 6381 device_tagenb = TRUE; 6382 else 6383 device_tagenb = FALSE; 6384 6385 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 6386 && device_tagenb == FALSE) 6387 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 6388 && device_tagenb == TRUE)) { 6389 6390 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 6391 /* 6392 * Delay change to use tags until after a 6393 * few commands have gone to this device so 6394 * the controller has time to perform transfer 6395 * negotiations without tagged messages getting 6396 * in the way. 6397 */ 6398 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6399 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6400 } else { 6401 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6402 qfrozen = TRUE; 6403 device->inq_flags &= ~SID_CmdQue; 6404 xpt_dev_ccbq_resize(cts->ccb_h.path, 6405 sim->max_dev_openings); 6406 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6407 device->tag_delay_count = 0; 6408 } 6409 } 6410 } 6411 6412 if (async_update == FALSE) { 6413 /* 6414 * If we are currently performing tagged transactions to 6415 * this device and want to change its negotiation parameters, 6416 * go non-tagged for a bit to give the controller a chance to 6417 * negotiate unhampered by tag messages. 6418 */ 6419 if ((device->inq_flags & SID_CmdQue) != 0 6420 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 6421 CCB_TRANS_SYNC_OFFSET_VALID| 6422 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 6423 xpt_toggle_tags(cts->ccb_h.path); 6424 6425 (*(sim->sim_action))(sim, (union ccb *)cts); 6426 } 6427 6428 if (qfrozen) { 6429 struct ccb_relsim crs; 6430 6431 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6432 /*priority*/1); 6433 crs.ccb_h.func_code = XPT_REL_SIMQ; 6434 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6435 crs.openings 6436 = crs.release_timeout 6437 = crs.qfrozen_cnt 6438 = 0; 6439 xpt_action((union ccb *)&crs); 6440 } 6441 } 6442 6443 6444 #endif /* CAM_NEW_TRAN_CODE */ 6445 6446 static void 6447 xpt_toggle_tags(struct cam_path *path) 6448 { 6449 struct cam_ed *dev; 6450 6451 /* 6452 * Give controllers a chance to renegotiate 6453 * before starting tag operations. We 6454 * "toggle" tagged queuing off then on 6455 * which causes the tag enable command delay 6456 * counter to come into effect. 6457 */ 6458 dev = path->device; 6459 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6460 || ((dev->inq_flags & SID_CmdQue) != 0 6461 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6462 struct ccb_trans_settings cts; 6463 6464 xpt_setup_ccb(&cts.ccb_h, path, 1); 6465 #ifdef CAM_NEW_TRAN_CODE 6466 cts.protocol = PROTO_SCSI; 6467 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6468 cts.transport = XPORT_UNSPECIFIED; 6469 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6470 cts.proto_specific.scsi.flags = 0; 6471 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6472 #else /* CAM_NEW_TRAN_CODE */ 6473 cts.flags = 0; 6474 cts.valid = CCB_TRANS_TQ_VALID; 6475 #endif /* CAM_NEW_TRAN_CODE */ 6476 xpt_set_transfer_settings(&cts, path->device, 6477 /*async_update*/TRUE); 6478 #ifdef CAM_NEW_TRAN_CODE 6479 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6480 #else /* CAM_NEW_TRAN_CODE */ 6481 cts.flags = CCB_TRANS_TAG_ENB; 6482 #endif /* CAM_NEW_TRAN_CODE */ 6483 xpt_set_transfer_settings(&cts, path->device, 6484 /*async_update*/TRUE); 6485 } 6486 } 6487 6488 static void 6489 xpt_start_tags(struct cam_path *path) 6490 { 6491 struct ccb_relsim crs; 6492 struct cam_ed *device; 6493 struct cam_sim *sim; 6494 int newopenings; 6495 6496 device = path->device; 6497 sim = path->bus->sim; 6498 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6499 xpt_freeze_devq(path, /*count*/1); 6500 device->inq_flags |= SID_CmdQue; 6501 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 6502 xpt_dev_ccbq_resize(path, newopenings); 6503 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6504 crs.ccb_h.func_code = XPT_REL_SIMQ; 6505 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6506 crs.openings 6507 = crs.release_timeout 6508 = crs.qfrozen_cnt 6509 = 0; 6510 xpt_action((union ccb *)&crs); 6511 } 6512 6513 static int busses_to_config; 6514 static int busses_to_reset; 6515 6516 static int 6517 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6518 { 6519 if (bus->path_id != CAM_XPT_PATH_ID) { 6520 struct cam_path path; 6521 struct ccb_pathinq cpi; 6522 int can_negotiate; 6523 6524 busses_to_config++; 6525 xpt_compile_path(&path, NULL, bus->path_id, 6526 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6527 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6528 cpi.ccb_h.func_code = XPT_PATH_INQ; 6529 xpt_action((union ccb *)&cpi); 6530 can_negotiate = cpi.hba_inquiry; 6531 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6532 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6533 && can_negotiate) 6534 busses_to_reset++; 6535 xpt_release_path(&path); 6536 } 6537 6538 return(1); 6539 } 6540 6541 static int 6542 xptconfigfunc(struct cam_eb *bus, void *arg) 6543 { 6544 struct cam_path *path; 6545 union ccb *work_ccb; 6546 6547 if (bus->path_id != CAM_XPT_PATH_ID) { 6548 cam_status status; 6549 int can_negotiate; 6550 6551 work_ccb = xpt_alloc_ccb(); 6552 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6553 CAM_TARGET_WILDCARD, 6554 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6555 kprintf("xptconfigfunc: xpt_create_path failed with " 6556 "status %#x for bus %d\n", status, bus->path_id); 6557 kprintf("xptconfigfunc: halting bus configuration\n"); 6558 xpt_free_ccb(work_ccb); 6559 busses_to_config--; 6560 xpt_finishconfig(xpt_periph, NULL); 6561 return(0); 6562 } 6563 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6564 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6565 xpt_action(work_ccb); 6566 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6567 kprintf("xptconfigfunc: CPI failed on bus %d " 6568 "with status %d\n", bus->path_id, 6569 work_ccb->ccb_h.status); 6570 xpt_finishconfig(xpt_periph, work_ccb); 6571 return(1); 6572 } 6573 6574 can_negotiate = work_ccb->cpi.hba_inquiry; 6575 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6576 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6577 && (can_negotiate != 0)) { 6578 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6579 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6580 work_ccb->ccb_h.cbfcnp = NULL; 6581 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6582 ("Resetting Bus\n")); 6583 xpt_action(work_ccb); 6584 xpt_finishconfig(xpt_periph, work_ccb); 6585 } else { 6586 /* Act as though we performed a successful BUS RESET */ 6587 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6588 xpt_finishconfig(xpt_periph, work_ccb); 6589 } 6590 } 6591 6592 return(1); 6593 } 6594 6595 static void 6596 xpt_config(void *arg) 6597 { 6598 /* 6599 * Now that interrupts are enabled, go find our devices 6600 */ 6601 6602 #ifdef CAMDEBUG 6603 /* Setup debugging flags and path */ 6604 #ifdef CAM_DEBUG_FLAGS 6605 cam_dflags = CAM_DEBUG_FLAGS; 6606 #else /* !CAM_DEBUG_FLAGS */ 6607 cam_dflags = CAM_DEBUG_NONE; 6608 #endif /* CAM_DEBUG_FLAGS */ 6609 #ifdef CAM_DEBUG_BUS 6610 if (cam_dflags != CAM_DEBUG_NONE) { 6611 if (xpt_create_path(&cam_dpath, xpt_periph, 6612 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6613 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6614 kprintf("xpt_config: xpt_create_path() failed for debug" 6615 " target %d:%d:%d, debugging disabled\n", 6616 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6617 cam_dflags = CAM_DEBUG_NONE; 6618 } 6619 } else 6620 cam_dpath = NULL; 6621 #else /* !CAM_DEBUG_BUS */ 6622 cam_dpath = NULL; 6623 #endif /* CAM_DEBUG_BUS */ 6624 #endif /* CAMDEBUG */ 6625 6626 /* 6627 * Scan all installed busses. 6628 */ 6629 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6630 6631 if (busses_to_config == 0) { 6632 /* Call manually because we don't have any busses */ 6633 xpt_finishconfig(xpt_periph, NULL); 6634 } else { 6635 if (busses_to_reset > 0 && scsi_delay >= 2000) { 6636 kprintf("Waiting %d seconds for SCSI " 6637 "devices to settle\n", scsi_delay/1000); 6638 } 6639 xpt_for_all_busses(xptconfigfunc, NULL); 6640 } 6641 } 6642 6643 /* 6644 * If the given device only has one peripheral attached to it, and if that 6645 * peripheral is the passthrough driver, announce it. This insures that the 6646 * user sees some sort of announcement for every peripheral in their system. 6647 */ 6648 static int 6649 xptpassannouncefunc(struct cam_ed *device, void *arg) 6650 { 6651 struct cam_periph *periph; 6652 int i; 6653 6654 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6655 periph = SLIST_NEXT(periph, periph_links), i++); 6656 6657 periph = SLIST_FIRST(&device->periphs); 6658 if ((i == 1) 6659 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6660 xpt_announce_periph(periph, NULL); 6661 6662 return(1); 6663 } 6664 6665 static void 6666 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6667 { 6668 struct periph_driver **p_drv; 6669 int i; 6670 6671 if (done_ccb != NULL) { 6672 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6673 ("xpt_finishconfig\n")); 6674 switch(done_ccb->ccb_h.func_code) { 6675 case XPT_RESET_BUS: 6676 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6677 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6678 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6679 xpt_action(done_ccb); 6680 return; 6681 } 6682 /* FALLTHROUGH */ 6683 case XPT_SCAN_BUS: 6684 default: 6685 xpt_free_path(done_ccb->ccb_h.path); 6686 busses_to_config--; 6687 break; 6688 } 6689 } 6690 6691 if (busses_to_config == 0) { 6692 /* Register all the peripheral drivers */ 6693 /* XXX This will have to change when we have loadable modules */ 6694 p_drv = periph_drivers; 6695 for (i = 0; p_drv[i] != NULL; i++) { 6696 (*p_drv[i]->init)(); 6697 } 6698 6699 /* 6700 * Check for devices with no "standard" peripheral driver 6701 * attached. For any devices like that, announce the 6702 * passthrough driver so the user will see something. 6703 */ 6704 xpt_for_all_devices(xptpassannouncefunc, NULL); 6705 6706 /* Release our hook so that the boot can continue. */ 6707 config_intrhook_disestablish(xpt_config_hook); 6708 kfree(xpt_config_hook, M_TEMP); 6709 xpt_config_hook = NULL; 6710 } 6711 if (done_ccb != NULL) 6712 xpt_free_ccb(done_ccb); 6713 } 6714 6715 static void 6716 xptaction(struct cam_sim *sim, union ccb *work_ccb) 6717 { 6718 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6719 6720 switch (work_ccb->ccb_h.func_code) { 6721 /* Common cases first */ 6722 case XPT_PATH_INQ: /* Path routing inquiry */ 6723 { 6724 struct ccb_pathinq *cpi; 6725 6726 cpi = &work_ccb->cpi; 6727 cpi->version_num = 1; /* XXX??? */ 6728 cpi->hba_inquiry = 0; 6729 cpi->target_sprt = 0; 6730 cpi->hba_misc = 0; 6731 cpi->hba_eng_cnt = 0; 6732 cpi->max_target = 0; 6733 cpi->max_lun = 0; 6734 cpi->initiator_id = 0; 6735 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6736 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6737 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6738 cpi->unit_number = sim->unit_number; 6739 cpi->bus_id = sim->bus_id; 6740 cpi->base_transfer_speed = 0; 6741 #ifdef CAM_NEW_TRAN_CODE 6742 cpi->protocol = PROTO_UNSPECIFIED; 6743 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 6744 cpi->transport = XPORT_UNSPECIFIED; 6745 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 6746 #endif /* CAM_NEW_TRAN_CODE */ 6747 cpi->ccb_h.status = CAM_REQ_CMP; 6748 xpt_done(work_ccb); 6749 break; 6750 } 6751 default: 6752 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6753 xpt_done(work_ccb); 6754 break; 6755 } 6756 } 6757 6758 /* 6759 * The xpt as a "controller" has no interrupt sources, so polling 6760 * is a no-op. 6761 */ 6762 static void 6763 xptpoll(struct cam_sim *sim) 6764 { 6765 } 6766 6767 /* 6768 * Should only be called by the machine interrupt dispatch routines, 6769 * so put these prototypes here instead of in the header. 6770 */ 6771 6772 static void 6773 swi_camnet(void *arg, void *frame) 6774 { 6775 camisr(&cam_netq); 6776 } 6777 6778 static void 6779 swi_cambio(void *arg, void *frame) 6780 { 6781 camisr(&cam_bioq); 6782 } 6783 6784 static void 6785 camisr(cam_isrq_t *queue) 6786 { 6787 struct ccb_hdr *ccb_h; 6788 6789 crit_enter(); 6790 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6791 int runq; 6792 6793 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6794 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6795 splz(); 6796 6797 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6798 ("camisr\n")); 6799 6800 runq = FALSE; 6801 6802 if (ccb_h->flags & CAM_HIGH_POWER) { 6803 struct highpowerlist *hphead; 6804 struct cam_ed *device; 6805 union ccb *send_ccb; 6806 6807 hphead = &highpowerq; 6808 6809 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6810 6811 /* 6812 * Increment the count since this command is done. 6813 */ 6814 num_highpower++; 6815 6816 /* 6817 * Any high powered commands queued up? 6818 */ 6819 if (send_ccb != NULL) { 6820 device = send_ccb->ccb_h.path->device; 6821 6822 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6823 6824 xpt_release_devq(send_ccb->ccb_h.path, 6825 /*count*/1, /*runqueue*/TRUE); 6826 } 6827 } 6828 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6829 struct cam_ed *dev; 6830 6831 dev = ccb_h->path->device; 6832 6833 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6834 6835 if (ccb_h->path->bus->sim->devq) { 6836 ccb_h->path->bus->sim->devq->send_active--; 6837 ccb_h->path->bus->sim->devq->send_openings++; 6838 } 6839 6840 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6841 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 6842 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6843 && (dev->ccbq.dev_active == 0))) { 6844 6845 xpt_release_devq(ccb_h->path, /*count*/1, 6846 /*run_queue*/TRUE); 6847 } 6848 6849 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6850 && (--dev->tag_delay_count == 0)) 6851 xpt_start_tags(ccb_h->path); 6852 6853 if ((dev->ccbq.queue.entries > 0) 6854 && (dev->qfrozen_cnt == 0) 6855 && (device_is_send_queued(dev) == 0)) { 6856 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6857 dev); 6858 } 6859 } 6860 6861 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6862 xpt_release_simq(ccb_h->path->bus->sim, 6863 /*run_queue*/TRUE); 6864 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6865 runq = FALSE; 6866 } 6867 6868 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6869 && (ccb_h->status & CAM_DEV_QFRZN)) { 6870 xpt_release_devq(ccb_h->path, /*count*/1, 6871 /*run_queue*/TRUE); 6872 ccb_h->status &= ~CAM_DEV_QFRZN; 6873 } else if (runq) { 6874 xpt_run_dev_sendq(ccb_h->path->bus); 6875 } 6876 6877 /* Call the peripheral driver's callback */ 6878 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6879 } 6880 crit_exit(); 6881 } 6882