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 1.35 2007/07/28 23:24:34 dillon Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/md5.h> 42 #include <sys/devicestat.h> 43 #include <sys/interrupt.h> 44 #include <sys/bus.h> 45 #include <sys/thread.h> 46 #include <sys/thread2.h> 47 48 #include <machine/clock.h> 49 50 #include "cam.h" 51 #include "cam_ccb.h" 52 #include "cam_periph.h" 53 #include "cam_sim.h" 54 #include "cam_xpt.h" 55 #include "cam_xpt_sim.h" 56 #include "cam_xpt_periph.h" 57 #include "cam_debug.h" 58 59 #include "scsi/scsi_all.h" 60 #include "scsi/scsi_message.h" 61 #include "scsi/scsi_pass.h" 62 #include "opt_cam.h" 63 64 /* Datastructures internal to the xpt layer */ 65 66 /* 67 * Definition of an async handler callback block. These are used to add 68 * SIMs and peripherals to the async callback lists. 69 */ 70 struct async_node { 71 SLIST_ENTRY(async_node) links; 72 u_int32_t event_enable; /* Async Event enables */ 73 void (*callback)(void *arg, u_int32_t code, 74 struct cam_path *path, void *args); 75 void *callback_arg; 76 }; 77 78 SLIST_HEAD(async_list, async_node); 79 SLIST_HEAD(periph_list, cam_periph); 80 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 81 82 /* 83 * This is the maximum number of high powered commands (e.g. start unit) 84 * that can be outstanding at a particular time. 85 */ 86 #ifndef CAM_MAX_HIGHPOWER 87 #define CAM_MAX_HIGHPOWER 4 88 #endif 89 90 /* number of high powered commands that can go through right now */ 91 static int num_highpower = CAM_MAX_HIGHPOWER; 92 93 /* 94 * Structure for queueing a device in a run queue. 95 * There is one run queue for allocating new ccbs, 96 * and another for sending ccbs to the controller. 97 */ 98 struct cam_ed_qinfo { 99 cam_pinfo pinfo; 100 struct cam_ed *device; 101 }; 102 103 /* 104 * The CAM EDT (Existing Device Table) contains the device information for 105 * all devices for all busses in the system. The table contains a 106 * cam_ed structure for each device on the bus. 107 */ 108 struct cam_ed { 109 TAILQ_ENTRY(cam_ed) links; 110 struct cam_ed_qinfo alloc_ccb_entry; 111 struct cam_ed_qinfo send_ccb_entry; 112 struct cam_et *target; 113 lun_id_t lun_id; 114 struct camq drvq; /* 115 * Queue of type drivers wanting to do 116 * work on this device. 117 */ 118 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 119 struct async_list asyncs; /* Async callback info for this B/T/L */ 120 struct periph_list periphs; /* All attached devices */ 121 u_int generation; /* Generation number */ 122 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 123 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 124 /* Storage for the inquiry data */ 125 struct scsi_inquiry_data inq_data; 126 u_int8_t inq_flags; /* 127 * Current settings for inquiry flags. 128 * This allows us to override settings 129 * like disconnection and tagged 130 * queuing for a device. 131 */ 132 u_int8_t queue_flags; /* Queue flags from the control page */ 133 u_int8_t serial_num_len; 134 u_int8_t *serial_num; 135 u_int32_t qfrozen_cnt; 136 u_int32_t flags; 137 #define CAM_DEV_UNCONFIGURED 0x01 138 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 139 #define CAM_DEV_REL_ON_COMPLETE 0x04 140 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 141 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 142 #define CAM_DEV_TAG_AFTER_COUNT 0x20 143 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 144 u_int32_t tag_delay_count; 145 #define CAM_TAG_DELAY_COUNT 5 146 u_int32_t refcount; 147 struct callout c_handle; 148 }; 149 150 /* 151 * Each target is represented by an ET (Existing Target). These 152 * entries are created when a target is successfully probed with an 153 * identify, and removed when a device fails to respond after a number 154 * of retries, or a bus rescan finds the device missing. 155 */ 156 struct cam_et { 157 TAILQ_HEAD(, cam_ed) ed_entries; 158 TAILQ_ENTRY(cam_et) links; 159 struct cam_eb *bus; 160 target_id_t target_id; 161 u_int32_t refcount; 162 u_int generation; 163 struct timeval last_reset; /* uptime of last reset */ 164 }; 165 166 /* 167 * Each bus is represented by an EB (Existing Bus). These entries 168 * are created by calls to xpt_bus_register and deleted by calls to 169 * xpt_bus_deregister. 170 */ 171 struct cam_eb { 172 TAILQ_HEAD(, cam_et) et_entries; 173 TAILQ_ENTRY(cam_eb) links; 174 path_id_t path_id; 175 struct cam_sim *sim; 176 struct timeval last_reset; /* uptime of last reset */ 177 u_int32_t flags; 178 #define CAM_EB_RUNQ_SCHEDULED 0x01 179 u_int32_t refcount; 180 u_int generation; 181 }; 182 183 struct cam_path { 184 struct cam_periph *periph; 185 struct cam_eb *bus; 186 struct cam_et *target; 187 struct cam_ed *device; 188 }; 189 190 struct xpt_quirk_entry { 191 struct scsi_inquiry_pattern inq_pat; 192 u_int8_t quirks; 193 #define CAM_QUIRK_NOLUNS 0x01 194 #define CAM_QUIRK_NOSERIAL 0x02 195 #define CAM_QUIRK_HILUNS 0x04 196 u_int mintags; 197 u_int maxtags; 198 }; 199 #define CAM_SCSI2_MAXLUN 8 200 201 typedef enum { 202 XPT_FLAG_OPEN = 0x01 203 } xpt_flags; 204 205 struct xpt_softc { 206 xpt_flags flags; 207 u_int32_t generation; 208 }; 209 210 static const char quantum[] = "QUANTUM"; 211 static const char sony[] = "SONY"; 212 static const char west_digital[] = "WDIGTL"; 213 static const char samsung[] = "SAMSUNG"; 214 static const char seagate[] = "SEAGATE"; 215 static const char microp[] = "MICROP"; 216 217 static struct xpt_quirk_entry xpt_quirk_table[] = 218 { 219 { 220 /* Reports QUEUE FULL for temporary resource shortages */ 221 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 222 /*quirks*/0, /*mintags*/24, /*maxtags*/32 223 }, 224 { 225 /* Reports QUEUE FULL for temporary resource shortages */ 226 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 227 /*quirks*/0, /*mintags*/24, /*maxtags*/32 228 }, 229 { 230 /* Reports QUEUE FULL for temporary resource shortages */ 231 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 232 /*quirks*/0, /*mintags*/24, /*maxtags*/32 233 }, 234 { 235 /* Broken tagged queuing drive */ 236 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 237 /*quirks*/0, /*mintags*/0, /*maxtags*/0 238 }, 239 { 240 /* Broken tagged queuing drive */ 241 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 242 /*quirks*/0, /*mintags*/0, /*maxtags*/0 243 }, 244 { 245 /* Broken tagged queuing drive */ 246 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 247 /*quirks*/0, /*mintags*/0, /*maxtags*/0 248 }, 249 { 250 /* 251 * Unfortunately, the Quantum Atlas III has the same 252 * problem as the Atlas II drives above. 253 * Reported by: "Johan Granlund" <johan@granlund.nu> 254 * 255 * For future reference, the drive with the problem was: 256 * QUANTUM QM39100TD-SW N1B0 257 * 258 * It's possible that Quantum will fix the problem in later 259 * firmware revisions. If that happens, the quirk entry 260 * will need to be made specific to the firmware revisions 261 * with the problem. 262 * 263 */ 264 /* Reports QUEUE FULL for temporary resource shortages */ 265 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 266 /*quirks*/0, /*mintags*/24, /*maxtags*/32 267 }, 268 { 269 /* 270 * 18 Gig Atlas III, same problem as the 9G version. 271 * Reported by: Andre Albsmeier 272 * <andre.albsmeier@mchp.siemens.de> 273 * 274 * For future reference, the drive with the problem was: 275 * QUANTUM QM318000TD-S N491 276 */ 277 /* Reports QUEUE FULL for temporary resource shortages */ 278 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 279 /*quirks*/0, /*mintags*/24, /*maxtags*/32 280 }, 281 { 282 /* 283 * Broken tagged queuing drive 284 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 285 * and: Martin Renters <martin@tdc.on.ca> 286 */ 287 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 288 /*quirks*/0, /*mintags*/0, /*maxtags*/0 289 }, 290 /* 291 * The Seagate Medalist Pro drives have very poor write 292 * performance with anything more than 2 tags. 293 * 294 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 295 * Drive: <SEAGATE ST36530N 1444> 296 * 297 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 298 * Drive: <SEAGATE ST34520W 1281> 299 * 300 * No one has actually reported that the 9G version 301 * (ST39140*) of the Medalist Pro has the same problem, but 302 * we're assuming that it does because the 4G and 6.5G 303 * versions of the drive are broken. 304 */ 305 { 306 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 307 /*quirks*/0, /*mintags*/2, /*maxtags*/2 308 }, 309 { 310 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 311 /*quirks*/0, /*mintags*/2, /*maxtags*/2 312 }, 313 { 314 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 315 /*quirks*/0, /*mintags*/2, /*maxtags*/2 316 }, 317 { 318 /* 319 * Slow when tagged queueing is enabled. Write performance 320 * steadily drops off with more and more concurrent 321 * transactions. Best sequential write performance with 322 * tagged queueing turned off and write caching turned on. 323 * 324 * PR: kern/10398 325 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 326 * Drive: DCAS-34330 w/ "S65A" firmware. 327 * 328 * The drive with the problem had the "S65A" firmware 329 * revision, and has also been reported (by Stephen J. 330 * Roznowski <sjr@home.net>) for a drive with the "S61A" 331 * firmware revision. 332 * 333 * Although no one has reported problems with the 2 gig 334 * version of the DCAS drive, the assumption is that it 335 * has the same problems as the 4 gig version. Therefore 336 * this quirk entries disables tagged queueing for all 337 * DCAS drives. 338 */ 339 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 340 /*quirks*/0, /*mintags*/0, /*maxtags*/0 341 }, 342 { 343 /* Broken tagged queuing drive */ 344 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 345 /*quirks*/0, /*mintags*/0, /*maxtags*/0 346 }, 347 { 348 /* Broken tagged queuing drive */ 349 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 350 /*quirks*/0, /*mintags*/0, /*maxtags*/0 351 }, 352 { 353 /* 354 * Broken tagged queuing drive. 355 * Submitted by: 356 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 357 * in PR kern/9535 358 */ 359 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 360 /*quirks*/0, /*mintags*/0, /*maxtags*/0 361 }, 362 { 363 /* 364 * Slow when tagged queueing is enabled. (1.5MB/sec versus 365 * 8MB/sec.) 366 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 367 * Best performance with these drives is achieved with 368 * tagged queueing turned off, and write caching turned on. 369 */ 370 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 371 /*quirks*/0, /*mintags*/0, /*maxtags*/0 372 }, 373 { 374 /* 375 * Slow when tagged queueing is enabled. (1.5MB/sec versus 376 * 8MB/sec.) 377 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 378 * Best performance with these drives is achieved with 379 * tagged queueing turned off, and write caching turned on. 380 */ 381 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 382 /*quirks*/0, /*mintags*/0, /*maxtags*/0 383 }, 384 { 385 /* 386 * Doesn't handle queue full condition correctly, 387 * so we need to limit maxtags to what the device 388 * can handle instead of determining this automatically. 389 */ 390 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 391 /*quirks*/0, /*mintags*/2, /*maxtags*/32 392 }, 393 { 394 /* Really only one LUN */ 395 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 396 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 397 }, 398 { 399 /* I can't believe we need a quirk for DPT volumes. */ 400 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 401 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 402 /*mintags*/0, /*maxtags*/255 403 }, 404 { 405 /* 406 * Many Sony CDROM drives don't like multi-LUN probing. 407 */ 408 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 409 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 410 }, 411 { 412 /* 413 * This drive doesn't like multiple LUN probing. 414 * Submitted by: Parag Patel <parag@cgt.com> 415 */ 416 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 417 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 418 }, 419 { 420 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 421 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 422 }, 423 { 424 /* 425 * The 8200 doesn't like multi-lun probing, and probably 426 * don't like serial number requests either. 427 */ 428 { 429 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 430 "EXB-8200*", "*" 431 }, 432 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 433 }, 434 { 435 /* 436 * Let's try the same as above, but for a drive that says 437 * it's an IPL-6860 but is actually an EXB 8200. 438 */ 439 { 440 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 441 "IPL-6860*", "*" 442 }, 443 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 444 }, 445 { 446 /* 447 * These Hitachi drives don't like multi-lun probing. 448 * The PR submitter has a DK319H, but says that the Linux 449 * kernel has a similar work-around for the DK312 and DK314, 450 * so all DK31* drives are quirked here. 451 * PR: misc/18793 452 * Submitted by: Paul Haddad <paul@pth.com> 453 */ 454 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 455 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 456 }, 457 { 458 /* 459 * This old revision of the TDC3600 is also SCSI-1, and 460 * hangs upon serial number probing. 461 */ 462 { 463 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 464 " TDC 3600", "U07:" 465 }, 466 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 467 }, 468 { 469 /* 470 * Would repond to all LUNs if asked for. 471 */ 472 { 473 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 474 "CP150", "*" 475 }, 476 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 477 }, 478 { 479 /* 480 * Would repond to all LUNs if asked for. 481 */ 482 { 483 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 484 "96X2*", "*" 485 }, 486 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 487 }, 488 { 489 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 490 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 491 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 492 }, 493 { 494 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 495 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 496 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 497 }, 498 { 499 /* TeraSolutions special settings for TRC-22 RAID */ 500 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 501 /*quirks*/0, /*mintags*/55, /*maxtags*/255 502 }, 503 { 504 /* Veritas Storage Appliance */ 505 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 506 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 507 }, 508 { 509 /* 510 * Would respond to all LUNs. Device type and removable 511 * flag are jumper-selectable. 512 */ 513 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 514 "Tahiti 1", "*" 515 }, 516 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 517 }, 518 { 519 /* Default tagged queuing parameters for all devices */ 520 { 521 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 522 /*vendor*/"*", /*product*/"*", /*revision*/"*" 523 }, 524 /*quirks*/0, /*mintags*/2, /*maxtags*/255 525 }, 526 }; 527 528 static const int xpt_quirk_table_size = 529 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 530 531 typedef enum { 532 DM_RET_COPY = 0x01, 533 DM_RET_FLAG_MASK = 0x0f, 534 DM_RET_NONE = 0x00, 535 DM_RET_STOP = 0x10, 536 DM_RET_DESCEND = 0x20, 537 DM_RET_ERROR = 0x30, 538 DM_RET_ACTION_MASK = 0xf0 539 } dev_match_ret; 540 541 typedef enum { 542 XPT_DEPTH_BUS, 543 XPT_DEPTH_TARGET, 544 XPT_DEPTH_DEVICE, 545 XPT_DEPTH_PERIPH 546 } xpt_traverse_depth; 547 548 struct xpt_traverse_config { 549 xpt_traverse_depth depth; 550 void *tr_func; 551 void *tr_arg; 552 }; 553 554 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 555 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 556 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 557 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 558 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 559 560 /* Transport layer configuration information */ 561 static struct xpt_softc xsoftc; 562 563 /* Queues for our software interrupt handler */ 564 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 565 static cam_isrq_t cam_bioq; 566 static cam_isrq_t cam_netq; 567 568 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 569 static SLIST_HEAD(,ccb_hdr) ccb_freeq; 570 static u_int xpt_max_ccbs; /* 571 * Maximum size of ccb pool. Modified as 572 * devices are added/removed or have their 573 * opening counts changed. 574 */ 575 static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 576 577 struct cam_periph *xpt_periph; 578 579 static periph_init_t xpt_periph_init; 580 581 static periph_init_t probe_periph_init; 582 583 static struct periph_driver xpt_driver = 584 { 585 xpt_periph_init, "xpt", 586 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 587 }; 588 589 static struct periph_driver probe_driver = 590 { 591 probe_periph_init, "probe", 592 TAILQ_HEAD_INITIALIZER(probe_driver.units) 593 }; 594 595 DATA_SET(periphdriver_set, xpt_driver); 596 DATA_SET(periphdriver_set, probe_driver); 597 598 #define XPT_CDEV_MAJOR 104 599 600 static d_open_t xptopen; 601 static d_close_t xptclose; 602 static d_ioctl_t xptioctl; 603 604 static struct dev_ops xpt_ops = { 605 { "xpt", XPT_CDEV_MAJOR, 0 }, 606 .d_open = xptopen, 607 .d_close = xptclose, 608 .d_ioctl = xptioctl 609 }; 610 611 static struct intr_config_hook *xpt_config_hook; 612 613 /* Registered busses */ 614 static TAILQ_HEAD(,cam_eb) xpt_busses; 615 static u_int bus_generation; 616 617 /* Storage for debugging datastructures */ 618 #ifdef CAMDEBUG 619 struct cam_path *cam_dpath; 620 u_int32_t cam_dflags; 621 u_int32_t cam_debug_delay; 622 #endif 623 624 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 625 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 626 #endif 627 628 /* 629 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 630 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 631 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 632 */ 633 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 634 || defined(CAM_DEBUG_LUN) 635 #ifdef CAMDEBUG 636 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 637 || !defined(CAM_DEBUG_LUN) 638 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 639 and CAM_DEBUG_LUN" 640 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 641 #else /* !CAMDEBUG */ 642 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 643 #endif /* CAMDEBUG */ 644 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 645 646 /* Our boot-time initialization hook */ 647 static void xpt_init(void *); 648 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL); 649 650 static cam_status xpt_compile_path(struct cam_path *new_path, 651 struct cam_periph *perph, 652 path_id_t path_id, 653 target_id_t target_id, 654 lun_id_t lun_id); 655 656 static void xpt_release_path(struct cam_path *path); 657 658 static void xpt_async_bcast(struct async_list *async_head, 659 u_int32_t async_code, 660 struct cam_path *path, 661 void *async_arg); 662 static void xpt_dev_async(u_int32_t async_code, 663 struct cam_eb *bus, 664 struct cam_et *target, 665 struct cam_ed *device, 666 void *async_arg); 667 static path_id_t xptnextfreepathid(void); 668 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 669 static union ccb *xpt_get_ccb(struct cam_ed *device); 670 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 671 u_int32_t new_priority); 672 static void xpt_run_dev_allocq(struct cam_eb *bus); 673 static void xpt_run_dev_sendq(struct cam_eb *bus); 674 static timeout_t xpt_release_devq_timeout; 675 static void xpt_release_bus(struct cam_eb *bus); 676 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 677 int run_queue); 678 static struct cam_et* 679 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 680 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 681 static struct cam_ed* 682 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 683 lun_id_t lun_id); 684 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 685 struct cam_ed *device); 686 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 687 static struct cam_eb* 688 xpt_find_bus(path_id_t path_id); 689 static struct cam_et* 690 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 691 static struct cam_ed* 692 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 693 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 694 static void xpt_scan_lun(struct cam_periph *periph, 695 struct cam_path *path, cam_flags flags, 696 union ccb *ccb); 697 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 698 static xpt_busfunc_t xptconfigbuscountfunc; 699 static xpt_busfunc_t xptconfigfunc; 700 static void xpt_config(void *arg); 701 static xpt_devicefunc_t xptpassannouncefunc; 702 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 703 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 704 static void xptpoll(struct cam_sim *sim); 705 static inthand2_t swi_camnet; 706 static inthand2_t swi_cambio; 707 static void camisr(cam_isrq_t *queue); 708 #if 0 709 static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 710 static void xptasync(struct cam_periph *periph, 711 u_int32_t code, cam_path *path); 712 #endif 713 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 714 int num_patterns, struct cam_eb *bus); 715 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 716 int num_patterns, struct cam_ed *device); 717 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 718 int num_patterns, 719 struct cam_periph *periph); 720 static xpt_busfunc_t xptedtbusfunc; 721 static xpt_targetfunc_t xptedttargetfunc; 722 static xpt_devicefunc_t xptedtdevicefunc; 723 static xpt_periphfunc_t xptedtperiphfunc; 724 static xpt_pdrvfunc_t xptplistpdrvfunc; 725 static xpt_periphfunc_t xptplistperiphfunc; 726 static int xptedtmatch(struct ccb_dev_match *cdm); 727 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 728 static int xptbustraverse(struct cam_eb *start_bus, 729 xpt_busfunc_t *tr_func, void *arg); 730 static int xpttargettraverse(struct cam_eb *bus, 731 struct cam_et *start_target, 732 xpt_targetfunc_t *tr_func, void *arg); 733 static int xptdevicetraverse(struct cam_et *target, 734 struct cam_ed *start_device, 735 xpt_devicefunc_t *tr_func, void *arg); 736 static int xptperiphtraverse(struct cam_ed *device, 737 struct cam_periph *start_periph, 738 xpt_periphfunc_t *tr_func, void *arg); 739 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 740 xpt_pdrvfunc_t *tr_func, void *arg); 741 static int xptpdperiphtraverse(struct periph_driver **pdrv, 742 struct cam_periph *start_periph, 743 xpt_periphfunc_t *tr_func, 744 void *arg); 745 static xpt_busfunc_t xptdefbusfunc; 746 static xpt_targetfunc_t xptdeftargetfunc; 747 static xpt_devicefunc_t xptdefdevicefunc; 748 static xpt_periphfunc_t xptdefperiphfunc; 749 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 750 #ifdef notusedyet 751 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 752 void *arg); 753 #endif 754 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 755 void *arg); 756 #ifdef notusedyet 757 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 758 void *arg); 759 #endif 760 static xpt_devicefunc_t xptsetasyncfunc; 761 static xpt_busfunc_t xptsetasyncbusfunc; 762 static cam_status xptregister(struct cam_periph *periph, 763 void *arg); 764 static cam_status proberegister(struct cam_periph *periph, 765 void *arg); 766 static void probeschedule(struct cam_periph *probe_periph); 767 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 768 static void proberequestdefaultnegotiation(struct cam_periph *periph); 769 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 770 static void probecleanup(struct cam_periph *periph); 771 static void xpt_find_quirk(struct cam_ed *device); 772 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 773 struct cam_ed *device, 774 int async_update); 775 static void xpt_toggle_tags(struct cam_path *path); 776 static void xpt_start_tags(struct cam_path *path); 777 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 778 struct cam_ed *dev); 779 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 780 struct cam_ed *dev); 781 static __inline int periph_is_queued(struct cam_periph *periph); 782 static __inline int device_is_alloc_queued(struct cam_ed *device); 783 static __inline int device_is_send_queued(struct cam_ed *device); 784 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 785 786 static __inline int 787 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 788 { 789 int retval; 790 791 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 792 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 793 cam_ccbq_resize(&dev->ccbq, 794 dev->ccbq.dev_openings 795 + dev->ccbq.dev_active); 796 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 797 } 798 /* 799 * The priority of a device waiting for CCB resources 800 * is that of the the highest priority peripheral driver 801 * enqueued. 802 */ 803 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 804 &dev->alloc_ccb_entry.pinfo, 805 CAMQ_GET_HEAD(&dev->drvq)->priority); 806 } else { 807 retval = 0; 808 } 809 810 return (retval); 811 } 812 813 static __inline int 814 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 815 { 816 int retval; 817 818 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 819 /* 820 * The priority of a device waiting for controller 821 * resources is that of the the highest priority CCB 822 * enqueued. 823 */ 824 retval = 825 xpt_schedule_dev(&bus->sim->devq->send_queue, 826 &dev->send_ccb_entry.pinfo, 827 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 828 } else { 829 retval = 0; 830 } 831 return (retval); 832 } 833 834 static __inline int 835 periph_is_queued(struct cam_periph *periph) 836 { 837 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 838 } 839 840 static __inline int 841 device_is_alloc_queued(struct cam_ed *device) 842 { 843 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 844 } 845 846 static __inline int 847 device_is_send_queued(struct cam_ed *device) 848 { 849 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 850 } 851 852 static __inline int 853 dev_allocq_is_runnable(struct cam_devq *devq) 854 { 855 /* 856 * Have work to do. 857 * Have space to do more work. 858 * Allowed to do work. 859 */ 860 return ((devq->alloc_queue.qfrozen_cnt == 0) 861 && (devq->alloc_queue.entries > 0) 862 && (devq->alloc_openings > 0)); 863 } 864 865 static void 866 xpt_periph_init(void) 867 { 868 dev_ops_add(&xpt_ops, 0, 0); 869 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 870 } 871 872 static void 873 probe_periph_init(void) 874 { 875 } 876 877 878 static void 879 xptdone(struct cam_periph *periph, union ccb *done_ccb) 880 { 881 /* Caller will release the CCB */ 882 wakeup(&done_ccb->ccb_h.cbfcnp); 883 } 884 885 static int 886 xptopen(struct dev_open_args *ap) 887 { 888 cdev_t dev = ap->a_head.a_dev; 889 int unit; 890 891 unit = minor(dev) & 0xff; 892 893 /* 894 * Only allow read-write access. 895 */ 896 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) 897 return(EPERM); 898 899 /* 900 * We don't allow nonblocking access. 901 */ 902 if ((ap->a_oflags & O_NONBLOCK) != 0) { 903 kprintf("xpt%d: can't do nonblocking access\n", unit); 904 return(ENODEV); 905 } 906 907 /* 908 * We only have one transport layer right now. If someone accesses 909 * us via something other than minor number 1, point out their 910 * mistake. 911 */ 912 if (unit != 0) { 913 kprintf("xptopen: got invalid xpt unit %d\n", unit); 914 return(ENXIO); 915 } 916 917 /* Mark ourselves open */ 918 xsoftc.flags |= XPT_FLAG_OPEN; 919 920 return(0); 921 } 922 923 static int 924 xptclose(struct dev_close_args *ap) 925 { 926 cdev_t dev = ap->a_head.a_dev; 927 int unit; 928 929 unit = minor(dev) & 0xff; 930 931 /* 932 * We only have one transport layer right now. If someone accesses 933 * us via something other than minor number 1, point out their 934 * mistake. 935 */ 936 if (unit != 0) { 937 kprintf("xptclose: got invalid xpt unit %d\n", unit); 938 return(ENXIO); 939 } 940 941 /* Mark ourselves closed */ 942 xsoftc.flags &= ~XPT_FLAG_OPEN; 943 944 return(0); 945 } 946 947 static int 948 xptioctl(struct dev_ioctl_args *ap) 949 { 950 cdev_t dev = ap->a_head.a_dev; 951 int unit, error; 952 953 error = 0; 954 unit = minor(dev) & 0xff; 955 956 /* 957 * We only have one transport layer right now. If someone accesses 958 * us via something other than minor number 1, point out their 959 * mistake. 960 */ 961 if (unit != 0) { 962 kprintf("xptioctl: got invalid xpt unit %d\n", unit); 963 return(ENXIO); 964 } 965 966 switch(ap->a_cmd) { 967 /* 968 * For the transport layer CAMIOCOMMAND ioctl, we really only want 969 * to accept CCB types that don't quite make sense to send through a 970 * passthrough driver. 971 */ 972 case CAMIOCOMMAND: { 973 union ccb *ccb; 974 union ccb *inccb; 975 976 inccb = (union ccb *)ap->a_data; 977 978 switch(inccb->ccb_h.func_code) { 979 case XPT_SCAN_BUS: 980 case XPT_RESET_BUS: 981 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 982 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 983 error = EINVAL; 984 break; 985 } 986 /* FALLTHROUGH */ 987 case XPT_PATH_INQ: 988 case XPT_ENG_INQ: 989 case XPT_SCAN_LUN: 990 991 ccb = xpt_alloc_ccb(); 992 993 /* 994 * Create a path using the bus, target, and lun the 995 * user passed in. 996 */ 997 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 998 inccb->ccb_h.path_id, 999 inccb->ccb_h.target_id, 1000 inccb->ccb_h.target_lun) != 1001 CAM_REQ_CMP){ 1002 error = EINVAL; 1003 xpt_free_ccb(ccb); 1004 break; 1005 } 1006 /* Ensure all of our fields are correct */ 1007 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1008 inccb->ccb_h.pinfo.priority); 1009 xpt_merge_ccb(ccb, inccb); 1010 ccb->ccb_h.cbfcnp = xptdone; 1011 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1012 bcopy(ccb, inccb, sizeof(union ccb)); 1013 xpt_free_path(ccb->ccb_h.path); 1014 xpt_free_ccb(ccb); 1015 break; 1016 1017 case XPT_DEBUG: { 1018 union ccb ccb; 1019 1020 /* 1021 * This is an immediate CCB, so it's okay to 1022 * allocate it on the stack. 1023 */ 1024 1025 /* 1026 * Create a path using the bus, target, and lun the 1027 * user passed in. 1028 */ 1029 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1030 inccb->ccb_h.path_id, 1031 inccb->ccb_h.target_id, 1032 inccb->ccb_h.target_lun) != 1033 CAM_REQ_CMP){ 1034 error = EINVAL; 1035 break; 1036 } 1037 /* Ensure all of our fields are correct */ 1038 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1039 inccb->ccb_h.pinfo.priority); 1040 xpt_merge_ccb(&ccb, inccb); 1041 ccb.ccb_h.cbfcnp = xptdone; 1042 xpt_action(&ccb); 1043 bcopy(&ccb, inccb, sizeof(union ccb)); 1044 xpt_free_path(ccb.ccb_h.path); 1045 break; 1046 1047 } 1048 case XPT_DEV_MATCH: { 1049 struct cam_periph_map_info mapinfo; 1050 struct cam_path *old_path; 1051 1052 /* 1053 * We can't deal with physical addresses for this 1054 * type of transaction. 1055 */ 1056 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1057 error = EINVAL; 1058 break; 1059 } 1060 1061 /* 1062 * Save this in case the caller had it set to 1063 * something in particular. 1064 */ 1065 old_path = inccb->ccb_h.path; 1066 1067 /* 1068 * We really don't need a path for the matching 1069 * code. The path is needed because of the 1070 * debugging statements in xpt_action(). They 1071 * assume that the CCB has a valid path. 1072 */ 1073 inccb->ccb_h.path = xpt_periph->path; 1074 1075 bzero(&mapinfo, sizeof(mapinfo)); 1076 1077 /* 1078 * Map the pattern and match buffers into kernel 1079 * virtual address space. 1080 */ 1081 error = cam_periph_mapmem(inccb, &mapinfo); 1082 1083 if (error) { 1084 inccb->ccb_h.path = old_path; 1085 break; 1086 } 1087 1088 /* 1089 * This is an immediate CCB, we can send it on directly. 1090 */ 1091 xpt_action(inccb); 1092 1093 /* 1094 * Map the buffers back into user space. 1095 */ 1096 cam_periph_unmapmem(inccb, &mapinfo); 1097 1098 inccb->ccb_h.path = old_path; 1099 1100 error = 0; 1101 break; 1102 } 1103 default: 1104 error = ENOTSUP; 1105 break; 1106 } 1107 break; 1108 } 1109 /* 1110 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1111 * with the periphal driver name and unit name filled in. The other 1112 * fields don't really matter as input. The passthrough driver name 1113 * ("pass"), and unit number are passed back in the ccb. The current 1114 * device generation number, and the index into the device peripheral 1115 * driver list, and the status are also passed back. Note that 1116 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1117 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1118 * (or rather should be) impossible for the device peripheral driver 1119 * list to change since we look at the whole thing in one pass, and 1120 * we do it within a critical section. 1121 * 1122 */ 1123 case CAMGETPASSTHRU: { 1124 union ccb *ccb; 1125 struct cam_periph *periph; 1126 struct periph_driver **p_drv; 1127 char *name; 1128 int unit; 1129 int cur_generation; 1130 int base_periph_found; 1131 int splbreaknum; 1132 1133 ccb = (union ccb *)ap->a_data; 1134 unit = ccb->cgdl.unit_number; 1135 name = ccb->cgdl.periph_name; 1136 /* 1137 * Every 100 devices, we want to call splz() to check for 1138 * and allow the software interrupt handler a chance to run. 1139 * 1140 * Most systems won't run into this check, but this should 1141 * avoid starvation in the software interrupt handler in 1142 * large systems. 1143 */ 1144 splbreaknum = 100; 1145 1146 ccb = (union ccb *)ap->a_data; 1147 1148 base_periph_found = 0; 1149 1150 /* 1151 * Sanity check -- make sure we don't get a null peripheral 1152 * driver name. 1153 */ 1154 if (*ccb->cgdl.periph_name == '\0') { 1155 error = EINVAL; 1156 break; 1157 } 1158 1159 /* Keep the list from changing while we traverse it */ 1160 crit_enter(); 1161 ptstartover: 1162 cur_generation = xsoftc.generation; 1163 1164 /* first find our driver in the list of drivers */ 1165 SET_FOREACH(p_drv, periphdriver_set) { 1166 if (strcmp((*p_drv)->driver_name, name) == 0) 1167 break; 1168 } 1169 1170 if (*p_drv == NULL) { 1171 crit_exit(); 1172 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1173 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1174 *ccb->cgdl.periph_name = '\0'; 1175 ccb->cgdl.unit_number = 0; 1176 error = ENOENT; 1177 break; 1178 } 1179 1180 /* 1181 * Run through every peripheral instance of this driver 1182 * and check to see whether it matches the unit passed 1183 * in by the user. If it does, get out of the loops and 1184 * find the passthrough driver associated with that 1185 * peripheral driver. 1186 */ 1187 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL; 1188 periph = TAILQ_NEXT(periph, unit_links)) { 1189 1190 if (periph->unit_number == unit) { 1191 break; 1192 } else if (--splbreaknum == 0) { 1193 splz(); 1194 splbreaknum = 100; 1195 if (cur_generation != xsoftc.generation) 1196 goto ptstartover; 1197 } 1198 } 1199 /* 1200 * If we found the peripheral driver that the user passed 1201 * in, go through all of the peripheral drivers for that 1202 * particular device and look for a passthrough driver. 1203 */ 1204 if (periph != NULL) { 1205 struct cam_ed *device; 1206 int i; 1207 1208 base_periph_found = 1; 1209 device = periph->path->device; 1210 for (i = 0, periph = device->periphs.slh_first; 1211 periph != NULL; 1212 periph = periph->periph_links.sle_next, i++) { 1213 /* 1214 * Check to see whether we have a 1215 * passthrough device or not. 1216 */ 1217 if (strcmp(periph->periph_name, "pass") == 0) { 1218 /* 1219 * Fill in the getdevlist fields. 1220 */ 1221 strcpy(ccb->cgdl.periph_name, 1222 periph->periph_name); 1223 ccb->cgdl.unit_number = 1224 periph->unit_number; 1225 if (periph->periph_links.sle_next) 1226 ccb->cgdl.status = 1227 CAM_GDEVLIST_MORE_DEVS; 1228 else 1229 ccb->cgdl.status = 1230 CAM_GDEVLIST_LAST_DEVICE; 1231 ccb->cgdl.generation = 1232 device->generation; 1233 ccb->cgdl.index = i; 1234 /* 1235 * Fill in some CCB header fields 1236 * that the user may want. 1237 */ 1238 ccb->ccb_h.path_id = 1239 periph->path->bus->path_id; 1240 ccb->ccb_h.target_id = 1241 periph->path->target->target_id; 1242 ccb->ccb_h.target_lun = 1243 periph->path->device->lun_id; 1244 ccb->ccb_h.status = CAM_REQ_CMP; 1245 break; 1246 } 1247 } 1248 } 1249 1250 /* 1251 * If the periph is null here, one of two things has 1252 * happened. The first possibility is that we couldn't 1253 * find the unit number of the particular peripheral driver 1254 * that the user is asking about. e.g. the user asks for 1255 * the passthrough driver for "da11". We find the list of 1256 * "da" peripherals all right, but there is no unit 11. 1257 * The other possibility is that we went through the list 1258 * of peripheral drivers attached to the device structure, 1259 * but didn't find one with the name "pass". Either way, 1260 * we return ENOENT, since we couldn't find something. 1261 */ 1262 if (periph == NULL) { 1263 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1264 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1265 *ccb->cgdl.periph_name = '\0'; 1266 ccb->cgdl.unit_number = 0; 1267 error = ENOENT; 1268 /* 1269 * It is unfortunate that this is even necessary, 1270 * but there are many, many clueless users out there. 1271 * If this is true, the user is looking for the 1272 * passthrough driver, but doesn't have one in his 1273 * kernel. 1274 */ 1275 if (base_periph_found == 1) { 1276 kprintf("xptioctl: pass driver is not in the " 1277 "kernel\n"); 1278 kprintf("xptioctl: put \"device pass0\" in " 1279 "your kernel config file\n"); 1280 } 1281 } 1282 crit_exit(); 1283 break; 1284 } 1285 default: 1286 error = ENOTTY; 1287 break; 1288 } 1289 1290 return(error); 1291 } 1292 1293 /* Functions accessed by the peripheral drivers */ 1294 static void 1295 xpt_init(void *dummy) 1296 { 1297 struct cam_sim *xpt_sim; 1298 struct cam_path *path; 1299 struct cam_devq *devq; 1300 cam_status status; 1301 1302 TAILQ_INIT(&xpt_busses); 1303 TAILQ_INIT(&cam_bioq); 1304 TAILQ_INIT(&cam_netq); 1305 SLIST_INIT(&ccb_freeq); 1306 STAILQ_INIT(&highpowerq); 1307 1308 /* 1309 * The xpt layer is, itself, the equivelent of a SIM. 1310 * Allow 16 ccbs in the ccb pool for it. This should 1311 * give decent parallelism when we probe busses and 1312 * perform other XPT functions. 1313 */ 1314 devq = cam_simq_alloc(16); 1315 xpt_sim = cam_sim_alloc(xptaction, 1316 xptpoll, 1317 "xpt", 1318 /*softc*/NULL, 1319 /*unit*/0, 1320 /*max_dev_transactions*/0, 1321 /*max_tagged_dev_transactions*/0, 1322 devq); 1323 cam_simq_release(devq); 1324 xpt_max_ccbs = 16; 1325 1326 xpt_bus_register(xpt_sim, /*bus #*/0); 1327 1328 /* 1329 * Looking at the XPT from the SIM layer, the XPT is 1330 * the equivelent of a peripheral driver. Allocate 1331 * a peripheral driver entry for us. 1332 */ 1333 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1334 CAM_TARGET_WILDCARD, 1335 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1336 kprintf("xpt_init: xpt_create_path failed with status %#x," 1337 " failing attach\n", status); 1338 return; 1339 } 1340 1341 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1342 path, NULL, 0, NULL); 1343 xpt_free_path(path); 1344 1345 xpt_sim->softc = xpt_periph; 1346 1347 /* 1348 * Register a callback for when interrupts are enabled. 1349 */ 1350 xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1351 M_TEMP, M_INTWAIT | M_ZERO); 1352 xpt_config_hook->ich_func = xpt_config; 1353 xpt_config_hook->ich_desc = "xpt"; 1354 xpt_config_hook->ich_order = 1000; 1355 if (config_intrhook_establish(xpt_config_hook) != 0) { 1356 kfree (xpt_config_hook, M_TEMP); 1357 kprintf("xpt_init: config_intrhook_establish failed " 1358 "- failing attach\n"); 1359 } 1360 1361 /* Install our software interrupt handlers */ 1362 register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet", NULL); 1363 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL); 1364 } 1365 1366 static cam_status 1367 xptregister(struct cam_periph *periph, void *arg) 1368 { 1369 if (periph == NULL) { 1370 kprintf("xptregister: periph was NULL!!\n"); 1371 return(CAM_REQ_CMP_ERR); 1372 } 1373 1374 periph->softc = NULL; 1375 1376 xpt_periph = periph; 1377 1378 return(CAM_REQ_CMP); 1379 } 1380 1381 int32_t 1382 xpt_add_periph(struct cam_periph *periph) 1383 { 1384 struct cam_ed *device; 1385 int32_t status; 1386 struct periph_list *periph_head; 1387 1388 device = periph->path->device; 1389 1390 periph_head = &device->periphs; 1391 1392 status = CAM_REQ_CMP; 1393 1394 if (device != NULL) { 1395 /* 1396 * Make room for this peripheral 1397 * so it will fit in the queue 1398 * when it's scheduled to run 1399 */ 1400 crit_enter(); 1401 status = camq_resize(&device->drvq, 1402 device->drvq.array_size + 1); 1403 1404 device->generation++; 1405 1406 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1407 crit_exit(); 1408 } 1409 1410 xsoftc.generation++; 1411 1412 return (status); 1413 } 1414 1415 void 1416 xpt_remove_periph(struct cam_periph *periph) 1417 { 1418 struct cam_ed *device; 1419 1420 device = periph->path->device; 1421 1422 if (device != NULL) { 1423 struct periph_list *periph_head; 1424 1425 periph_head = &device->periphs; 1426 1427 /* Release the slot for this peripheral */ 1428 crit_enter(); 1429 camq_resize(&device->drvq, device->drvq.array_size - 1); 1430 1431 device->generation++; 1432 1433 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1434 crit_exit(); 1435 } 1436 1437 xsoftc.generation++; 1438 1439 } 1440 1441 void 1442 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1443 { 1444 u_int mb; 1445 struct cam_path *path; 1446 struct ccb_trans_settings cts; 1447 1448 path = periph->path; 1449 /* 1450 * To ensure that this is printed in one piece, 1451 * mask out CAM interrupts. 1452 */ 1453 crit_enter(); 1454 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1455 periph->periph_name, periph->unit_number, 1456 path->bus->sim->sim_name, 1457 path->bus->sim->unit_number, 1458 path->bus->sim->bus_id, 1459 path->target->target_id, 1460 path->device->lun_id); 1461 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1462 scsi_print_inquiry(&path->device->inq_data); 1463 if ((bootverbose) 1464 && (path->device->serial_num_len > 0)) { 1465 /* Don't wrap the screen - print only the first 60 chars */ 1466 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1467 periph->unit_number, path->device->serial_num); 1468 } 1469 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1470 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1471 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1472 xpt_action((union ccb*)&cts); 1473 if (cts.ccb_h.status == CAM_REQ_CMP) { 1474 u_int speed; 1475 u_int freq; 1476 1477 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1478 && cts.sync_offset != 0) { 1479 freq = scsi_calc_syncsrate(cts.sync_period); 1480 speed = freq; 1481 } else { 1482 struct ccb_pathinq cpi; 1483 1484 /* Ask the SIM for its base transfer speed */ 1485 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1486 cpi.ccb_h.func_code = XPT_PATH_INQ; 1487 xpt_action((union ccb *)&cpi); 1488 1489 speed = cpi.base_transfer_speed; 1490 freq = 0; 1491 } 1492 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1493 speed *= (0x01 << cts.bus_width); 1494 mb = speed / 1000; 1495 if (mb > 0) 1496 kprintf("%s%d: %d.%03dMB/s transfers", 1497 periph->periph_name, periph->unit_number, 1498 mb, speed % 1000); 1499 else 1500 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1501 periph->unit_number, speed); 1502 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1503 && cts.sync_offset != 0) { 1504 kprintf(" (%d.%03dMHz, offset %d", freq / 1000, 1505 freq % 1000, cts.sync_offset); 1506 } 1507 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1508 && cts.bus_width > 0) { 1509 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1510 && cts.sync_offset != 0) { 1511 kprintf(", "); 1512 } else { 1513 kprintf(" ("); 1514 } 1515 kprintf("%dbit)", 8 * (0x01 << cts.bus_width)); 1516 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1517 && cts.sync_offset != 0) { 1518 kprintf(")"); 1519 } 1520 1521 if (path->device->inq_flags & SID_CmdQue 1522 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1523 kprintf(", Tagged Queueing Enabled"); 1524 } 1525 1526 kprintf("\n"); 1527 } else if (path->device->inq_flags & SID_CmdQue 1528 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1529 kprintf("%s%d: Tagged Queueing Enabled\n", 1530 periph->periph_name, periph->unit_number); 1531 } 1532 1533 /* 1534 * We only want to print the caller's announce string if they've 1535 * passed one in.. 1536 */ 1537 if (announce_string != NULL) 1538 kprintf("%s%d: %s\n", periph->periph_name, 1539 periph->unit_number, announce_string); 1540 crit_exit(); 1541 } 1542 1543 1544 static dev_match_ret 1545 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns, 1546 struct cam_eb *bus) 1547 { 1548 dev_match_ret retval; 1549 int i; 1550 1551 retval = DM_RET_NONE; 1552 1553 /* 1554 * If we aren't given something to match against, that's an error. 1555 */ 1556 if (bus == NULL) 1557 return(DM_RET_ERROR); 1558 1559 /* 1560 * If there are no match entries, then this bus matches no 1561 * matter what. 1562 */ 1563 if ((patterns == NULL) || (num_patterns == 0)) 1564 return(DM_RET_DESCEND | DM_RET_COPY); 1565 1566 for (i = 0; i < num_patterns; i++) { 1567 struct bus_match_pattern *cur_pattern; 1568 1569 /* 1570 * If the pattern in question isn't for a bus node, we 1571 * aren't interested. However, we do indicate to the 1572 * calling routine that we should continue descending the 1573 * tree, since the user wants to match against lower-level 1574 * EDT elements. 1575 */ 1576 if (patterns[i].type != DEV_MATCH_BUS) { 1577 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1578 retval |= DM_RET_DESCEND; 1579 continue; 1580 } 1581 1582 cur_pattern = &patterns[i].pattern.bus_pattern; 1583 1584 /* 1585 * If they want to match any bus node, we give them any 1586 * device node. 1587 */ 1588 if (cur_pattern->flags == BUS_MATCH_ANY) { 1589 /* set the copy flag */ 1590 retval |= DM_RET_COPY; 1591 1592 /* 1593 * If we've already decided on an action, go ahead 1594 * and return. 1595 */ 1596 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1597 return(retval); 1598 } 1599 1600 /* 1601 * Not sure why someone would do this... 1602 */ 1603 if (cur_pattern->flags == BUS_MATCH_NONE) 1604 continue; 1605 1606 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1607 && (cur_pattern->path_id != bus->path_id)) 1608 continue; 1609 1610 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1611 && (cur_pattern->bus_id != bus->sim->bus_id)) 1612 continue; 1613 1614 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1615 && (cur_pattern->unit_number != bus->sim->unit_number)) 1616 continue; 1617 1618 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1619 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1620 DEV_IDLEN) != 0)) 1621 continue; 1622 1623 /* 1624 * If we get to this point, the user definitely wants 1625 * information on this bus. So tell the caller to copy the 1626 * data out. 1627 */ 1628 retval |= DM_RET_COPY; 1629 1630 /* 1631 * If the return action has been set to descend, then we 1632 * know that we've already seen a non-bus matching 1633 * expression, therefore we need to further descend the tree. 1634 * This won't change by continuing around the loop, so we 1635 * go ahead and return. If we haven't seen a non-bus 1636 * matching expression, we keep going around the loop until 1637 * we exhaust the matching expressions. We'll set the stop 1638 * flag once we fall out of the loop. 1639 */ 1640 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1641 return(retval); 1642 } 1643 1644 /* 1645 * If the return action hasn't been set to descend yet, that means 1646 * we haven't seen anything other than bus matching patterns. So 1647 * tell the caller to stop descending the tree -- the user doesn't 1648 * want to match against lower level tree elements. 1649 */ 1650 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1651 retval |= DM_RET_STOP; 1652 1653 return(retval); 1654 } 1655 1656 static dev_match_ret 1657 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns, 1658 struct cam_ed *device) 1659 { 1660 dev_match_ret retval; 1661 int i; 1662 1663 retval = DM_RET_NONE; 1664 1665 /* 1666 * If we aren't given something to match against, that's an error. 1667 */ 1668 if (device == NULL) 1669 return(DM_RET_ERROR); 1670 1671 /* 1672 * If there are no match entries, then this device matches no 1673 * matter what. 1674 */ 1675 if ((patterns == NULL) || (patterns == 0)) 1676 return(DM_RET_DESCEND | DM_RET_COPY); 1677 1678 for (i = 0; i < num_patterns; i++) { 1679 struct device_match_pattern *cur_pattern; 1680 1681 /* 1682 * If the pattern in question isn't for a device node, we 1683 * aren't interested. 1684 */ 1685 if (patterns[i].type != DEV_MATCH_DEVICE) { 1686 if ((patterns[i].type == DEV_MATCH_PERIPH) 1687 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1688 retval |= DM_RET_DESCEND; 1689 continue; 1690 } 1691 1692 cur_pattern = &patterns[i].pattern.device_pattern; 1693 1694 /* 1695 * If they want to match any device node, we give them any 1696 * device node. 1697 */ 1698 if (cur_pattern->flags == DEV_MATCH_ANY) { 1699 /* set the copy flag */ 1700 retval |= DM_RET_COPY; 1701 1702 1703 /* 1704 * If we've already decided on an action, go ahead 1705 * and return. 1706 */ 1707 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1708 return(retval); 1709 } 1710 1711 /* 1712 * Not sure why someone would do this... 1713 */ 1714 if (cur_pattern->flags == DEV_MATCH_NONE) 1715 continue; 1716 1717 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1718 && (cur_pattern->path_id != device->target->bus->path_id)) 1719 continue; 1720 1721 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1722 && (cur_pattern->target_id != device->target->target_id)) 1723 continue; 1724 1725 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1726 && (cur_pattern->target_lun != device->lun_id)) 1727 continue; 1728 1729 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1730 && (cam_quirkmatch((caddr_t)&device->inq_data, 1731 (caddr_t)&cur_pattern->inq_pat, 1732 1, sizeof(cur_pattern->inq_pat), 1733 scsi_static_inquiry_match) == NULL)) 1734 continue; 1735 1736 /* 1737 * If we get to this point, the user definitely wants 1738 * information on this device. So tell the caller to copy 1739 * the data out. 1740 */ 1741 retval |= DM_RET_COPY; 1742 1743 /* 1744 * If the return action has been set to descend, then we 1745 * know that we've already seen a peripheral matching 1746 * expression, therefore we need to further descend the tree. 1747 * This won't change by continuing around the loop, so we 1748 * go ahead and return. If we haven't seen a peripheral 1749 * matching expression, we keep going around the loop until 1750 * we exhaust the matching expressions. We'll set the stop 1751 * flag once we fall out of the loop. 1752 */ 1753 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1754 return(retval); 1755 } 1756 1757 /* 1758 * If the return action hasn't been set to descend yet, that means 1759 * we haven't seen any peripheral matching patterns. So tell the 1760 * caller to stop descending the tree -- the user doesn't want to 1761 * match against lower level tree elements. 1762 */ 1763 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1764 retval |= DM_RET_STOP; 1765 1766 return(retval); 1767 } 1768 1769 /* 1770 * Match a single peripheral against any number of match patterns. 1771 */ 1772 static dev_match_ret 1773 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns, 1774 struct cam_periph *periph) 1775 { 1776 dev_match_ret retval; 1777 int i; 1778 1779 /* 1780 * If we aren't given something to match against, that's an error. 1781 */ 1782 if (periph == NULL) 1783 return(DM_RET_ERROR); 1784 1785 /* 1786 * If there are no match entries, then this peripheral matches no 1787 * matter what. 1788 */ 1789 if ((patterns == NULL) || (num_patterns == 0)) 1790 return(DM_RET_STOP | DM_RET_COPY); 1791 1792 /* 1793 * There aren't any nodes below a peripheral node, so there's no 1794 * reason to descend the tree any further. 1795 */ 1796 retval = DM_RET_STOP; 1797 1798 for (i = 0; i < num_patterns; i++) { 1799 struct periph_match_pattern *cur_pattern; 1800 1801 /* 1802 * If the pattern in question isn't for a peripheral, we 1803 * aren't interested. 1804 */ 1805 if (patterns[i].type != DEV_MATCH_PERIPH) 1806 continue; 1807 1808 cur_pattern = &patterns[i].pattern.periph_pattern; 1809 1810 /* 1811 * If they want to match on anything, then we will do so. 1812 */ 1813 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1814 /* set the copy flag */ 1815 retval |= DM_RET_COPY; 1816 1817 /* 1818 * We've already set the return action to stop, 1819 * since there are no nodes below peripherals in 1820 * the tree. 1821 */ 1822 return(retval); 1823 } 1824 1825 /* 1826 * Not sure why someone would do this... 1827 */ 1828 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1829 continue; 1830 1831 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1832 && (cur_pattern->path_id != periph->path->bus->path_id)) 1833 continue; 1834 1835 /* 1836 * For the target and lun id's, we have to make sure the 1837 * target and lun pointers aren't NULL. The xpt peripheral 1838 * has a wildcard target and device. 1839 */ 1840 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1841 && ((periph->path->target == NULL) 1842 ||(cur_pattern->target_id != periph->path->target->target_id))) 1843 continue; 1844 1845 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1846 && ((periph->path->device == NULL) 1847 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1848 continue; 1849 1850 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1851 && (cur_pattern->unit_number != periph->unit_number)) 1852 continue; 1853 1854 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 1855 && (strncmp(cur_pattern->periph_name, periph->periph_name, 1856 DEV_IDLEN) != 0)) 1857 continue; 1858 1859 /* 1860 * If we get to this point, the user definitely wants 1861 * information on this peripheral. So tell the caller to 1862 * copy the data out. 1863 */ 1864 retval |= DM_RET_COPY; 1865 1866 /* 1867 * The return action has already been set to stop, since 1868 * peripherals don't have any nodes below them in the EDT. 1869 */ 1870 return(retval); 1871 } 1872 1873 /* 1874 * If we get to this point, the peripheral that was passed in 1875 * doesn't match any of the patterns. 1876 */ 1877 return(retval); 1878 } 1879 1880 static int 1881 xptedtbusfunc(struct cam_eb *bus, void *arg) 1882 { 1883 struct ccb_dev_match *cdm; 1884 dev_match_ret retval; 1885 1886 cdm = (struct ccb_dev_match *)arg; 1887 1888 /* 1889 * If our position is for something deeper in the tree, that means 1890 * that we've already seen this node. So, we keep going down. 1891 */ 1892 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1893 && (cdm->pos.cookie.bus == bus) 1894 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1895 && (cdm->pos.cookie.target != NULL)) 1896 retval = DM_RET_DESCEND; 1897 else 1898 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 1899 1900 /* 1901 * If we got an error, bail out of the search. 1902 */ 1903 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 1904 cdm->status = CAM_DEV_MATCH_ERROR; 1905 return(0); 1906 } 1907 1908 /* 1909 * If the copy flag is set, copy this bus out. 1910 */ 1911 if (retval & DM_RET_COPY) { 1912 int spaceleft, j; 1913 1914 spaceleft = cdm->match_buf_len - (cdm->num_matches * 1915 sizeof(struct dev_match_result)); 1916 1917 /* 1918 * If we don't have enough space to put in another 1919 * match result, save our position and tell the 1920 * user there are more devices to check. 1921 */ 1922 if (spaceleft < sizeof(struct dev_match_result)) { 1923 bzero(&cdm->pos, sizeof(cdm->pos)); 1924 cdm->pos.position_type = 1925 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 1926 1927 cdm->pos.cookie.bus = bus; 1928 cdm->pos.generations[CAM_BUS_GENERATION]= 1929 bus_generation; 1930 cdm->status = CAM_DEV_MATCH_MORE; 1931 return(0); 1932 } 1933 j = cdm->num_matches; 1934 cdm->num_matches++; 1935 cdm->matches[j].type = DEV_MATCH_BUS; 1936 cdm->matches[j].result.bus_result.path_id = bus->path_id; 1937 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 1938 cdm->matches[j].result.bus_result.unit_number = 1939 bus->sim->unit_number; 1940 strncpy(cdm->matches[j].result.bus_result.dev_name, 1941 bus->sim->sim_name, DEV_IDLEN); 1942 } 1943 1944 /* 1945 * If the user is only interested in busses, there's no 1946 * reason to descend to the next level in the tree. 1947 */ 1948 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 1949 return(1); 1950 1951 /* 1952 * If there is a target generation recorded, check it to 1953 * make sure the target list hasn't changed. 1954 */ 1955 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1956 && (bus == cdm->pos.cookie.bus) 1957 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1958 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 1959 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 1960 bus->generation)) { 1961 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1962 return(0); 1963 } 1964 1965 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1966 && (cdm->pos.cookie.bus == bus) 1967 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1968 && (cdm->pos.cookie.target != NULL)) 1969 return(xpttargettraverse(bus, 1970 (struct cam_et *)cdm->pos.cookie.target, 1971 xptedttargetfunc, arg)); 1972 else 1973 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 1974 } 1975 1976 static int 1977 xptedttargetfunc(struct cam_et *target, void *arg) 1978 { 1979 struct ccb_dev_match *cdm; 1980 1981 cdm = (struct ccb_dev_match *)arg; 1982 1983 /* 1984 * If there is a device list generation recorded, check it to 1985 * make sure the device list hasn't changed. 1986 */ 1987 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 1988 && (cdm->pos.cookie.bus == target->bus) 1989 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 1990 && (cdm->pos.cookie.target == target) 1991 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 1992 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 1993 && (cdm->pos.generations[CAM_DEV_GENERATION] != 1994 target->generation)) { 1995 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 1996 return(0); 1997 } 1998 1999 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2000 && (cdm->pos.cookie.bus == target->bus) 2001 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2002 && (cdm->pos.cookie.target == target) 2003 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2004 && (cdm->pos.cookie.device != NULL)) 2005 return(xptdevicetraverse(target, 2006 (struct cam_ed *)cdm->pos.cookie.device, 2007 xptedtdevicefunc, arg)); 2008 else 2009 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2010 } 2011 2012 static int 2013 xptedtdevicefunc(struct cam_ed *device, void *arg) 2014 { 2015 2016 struct ccb_dev_match *cdm; 2017 dev_match_ret retval; 2018 2019 cdm = (struct ccb_dev_match *)arg; 2020 2021 /* 2022 * If our position is for something deeper in the tree, that means 2023 * that we've already seen this node. So, we keep going down. 2024 */ 2025 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2026 && (cdm->pos.cookie.device == device) 2027 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2028 && (cdm->pos.cookie.periph != NULL)) 2029 retval = DM_RET_DESCEND; 2030 else 2031 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2032 device); 2033 2034 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2035 cdm->status = CAM_DEV_MATCH_ERROR; 2036 return(0); 2037 } 2038 2039 /* 2040 * If the copy flag is set, copy this device out. 2041 */ 2042 if (retval & DM_RET_COPY) { 2043 int spaceleft, j; 2044 2045 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2046 sizeof(struct dev_match_result)); 2047 2048 /* 2049 * If we don't have enough space to put in another 2050 * match result, save our position and tell the 2051 * user there are more devices to check. 2052 */ 2053 if (spaceleft < sizeof(struct dev_match_result)) { 2054 bzero(&cdm->pos, sizeof(cdm->pos)); 2055 cdm->pos.position_type = 2056 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2057 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2058 2059 cdm->pos.cookie.bus = device->target->bus; 2060 cdm->pos.generations[CAM_BUS_GENERATION]= 2061 bus_generation; 2062 cdm->pos.cookie.target = device->target; 2063 cdm->pos.generations[CAM_TARGET_GENERATION] = 2064 device->target->bus->generation; 2065 cdm->pos.cookie.device = device; 2066 cdm->pos.generations[CAM_DEV_GENERATION] = 2067 device->target->generation; 2068 cdm->status = CAM_DEV_MATCH_MORE; 2069 return(0); 2070 } 2071 j = cdm->num_matches; 2072 cdm->num_matches++; 2073 cdm->matches[j].type = DEV_MATCH_DEVICE; 2074 cdm->matches[j].result.device_result.path_id = 2075 device->target->bus->path_id; 2076 cdm->matches[j].result.device_result.target_id = 2077 device->target->target_id; 2078 cdm->matches[j].result.device_result.target_lun = 2079 device->lun_id; 2080 bcopy(&device->inq_data, 2081 &cdm->matches[j].result.device_result.inq_data, 2082 sizeof(struct scsi_inquiry_data)); 2083 2084 /* Let the user know whether this device is unconfigured */ 2085 if (device->flags & CAM_DEV_UNCONFIGURED) 2086 cdm->matches[j].result.device_result.flags = 2087 DEV_RESULT_UNCONFIGURED; 2088 else 2089 cdm->matches[j].result.device_result.flags = 2090 DEV_RESULT_NOFLAG; 2091 } 2092 2093 /* 2094 * If the user isn't interested in peripherals, don't descend 2095 * the tree any further. 2096 */ 2097 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2098 return(1); 2099 2100 /* 2101 * If there is a peripheral list generation recorded, make sure 2102 * it hasn't changed. 2103 */ 2104 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2105 && (device->target->bus == cdm->pos.cookie.bus) 2106 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2107 && (device->target == cdm->pos.cookie.target) 2108 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2109 && (device == cdm->pos.cookie.device) 2110 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2111 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2112 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2113 device->generation)){ 2114 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2115 return(0); 2116 } 2117 2118 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2119 && (cdm->pos.cookie.bus == device->target->bus) 2120 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2121 && (cdm->pos.cookie.target == device->target) 2122 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2123 && (cdm->pos.cookie.device == device) 2124 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2125 && (cdm->pos.cookie.periph != NULL)) 2126 return(xptperiphtraverse(device, 2127 (struct cam_periph *)cdm->pos.cookie.periph, 2128 xptedtperiphfunc, arg)); 2129 else 2130 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2131 } 2132 2133 static int 2134 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2135 { 2136 struct ccb_dev_match *cdm; 2137 dev_match_ret retval; 2138 2139 cdm = (struct ccb_dev_match *)arg; 2140 2141 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2142 2143 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2144 cdm->status = CAM_DEV_MATCH_ERROR; 2145 return(0); 2146 } 2147 2148 /* 2149 * If the copy flag is set, copy this peripheral out. 2150 */ 2151 if (retval & DM_RET_COPY) { 2152 int spaceleft, j; 2153 2154 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2155 sizeof(struct dev_match_result)); 2156 2157 /* 2158 * If we don't have enough space to put in another 2159 * match result, save our position and tell the 2160 * user there are more devices to check. 2161 */ 2162 if (spaceleft < sizeof(struct dev_match_result)) { 2163 bzero(&cdm->pos, sizeof(cdm->pos)); 2164 cdm->pos.position_type = 2165 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2166 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2167 CAM_DEV_POS_PERIPH; 2168 2169 cdm->pos.cookie.bus = periph->path->bus; 2170 cdm->pos.generations[CAM_BUS_GENERATION]= 2171 bus_generation; 2172 cdm->pos.cookie.target = periph->path->target; 2173 cdm->pos.generations[CAM_TARGET_GENERATION] = 2174 periph->path->bus->generation; 2175 cdm->pos.cookie.device = periph->path->device; 2176 cdm->pos.generations[CAM_DEV_GENERATION] = 2177 periph->path->target->generation; 2178 cdm->pos.cookie.periph = periph; 2179 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2180 periph->path->device->generation; 2181 cdm->status = CAM_DEV_MATCH_MORE; 2182 return(0); 2183 } 2184 2185 j = cdm->num_matches; 2186 cdm->num_matches++; 2187 cdm->matches[j].type = DEV_MATCH_PERIPH; 2188 cdm->matches[j].result.periph_result.path_id = 2189 periph->path->bus->path_id; 2190 cdm->matches[j].result.periph_result.target_id = 2191 periph->path->target->target_id; 2192 cdm->matches[j].result.periph_result.target_lun = 2193 periph->path->device->lun_id; 2194 cdm->matches[j].result.periph_result.unit_number = 2195 periph->unit_number; 2196 strncpy(cdm->matches[j].result.periph_result.periph_name, 2197 periph->periph_name, DEV_IDLEN); 2198 } 2199 2200 return(1); 2201 } 2202 2203 static int 2204 xptedtmatch(struct ccb_dev_match *cdm) 2205 { 2206 int ret; 2207 2208 cdm->num_matches = 0; 2209 2210 /* 2211 * Check the bus list generation. If it has changed, the user 2212 * needs to reset everything and start over. 2213 */ 2214 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2215 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2216 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2217 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2218 return(0); 2219 } 2220 2221 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2222 && (cdm->pos.cookie.bus != NULL)) 2223 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2224 xptedtbusfunc, cdm); 2225 else 2226 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2227 2228 /* 2229 * If we get back 0, that means that we had to stop before fully 2230 * traversing the EDT. It also means that one of the subroutines 2231 * has set the status field to the proper value. If we get back 1, 2232 * we've fully traversed the EDT and copied out any matching entries. 2233 */ 2234 if (ret == 1) 2235 cdm->status = CAM_DEV_MATCH_LAST; 2236 2237 return(ret); 2238 } 2239 2240 static int 2241 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2242 { 2243 struct ccb_dev_match *cdm; 2244 2245 cdm = (struct ccb_dev_match *)arg; 2246 2247 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2248 && (cdm->pos.cookie.pdrv == pdrv) 2249 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2250 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2251 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2252 (*pdrv)->generation)) { 2253 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2254 return(0); 2255 } 2256 2257 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2258 && (cdm->pos.cookie.pdrv == pdrv) 2259 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2260 && (cdm->pos.cookie.periph != NULL)) 2261 return(xptpdperiphtraverse(pdrv, 2262 (struct cam_periph *)cdm->pos.cookie.periph, 2263 xptplistperiphfunc, arg)); 2264 else 2265 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2266 } 2267 2268 static int 2269 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2270 { 2271 struct ccb_dev_match *cdm; 2272 dev_match_ret retval; 2273 2274 cdm = (struct ccb_dev_match *)arg; 2275 2276 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2277 2278 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2279 cdm->status = CAM_DEV_MATCH_ERROR; 2280 return(0); 2281 } 2282 2283 /* 2284 * If the copy flag is set, copy this peripheral out. 2285 */ 2286 if (retval & DM_RET_COPY) { 2287 int spaceleft, j; 2288 2289 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2290 sizeof(struct dev_match_result)); 2291 2292 /* 2293 * If we don't have enough space to put in another 2294 * match result, save our position and tell the 2295 * user there are more devices to check. 2296 */ 2297 if (spaceleft < sizeof(struct dev_match_result)) { 2298 struct periph_driver **pdrv; 2299 2300 pdrv = NULL; 2301 bzero(&cdm->pos, sizeof(cdm->pos)); 2302 cdm->pos.position_type = 2303 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2304 CAM_DEV_POS_PERIPH; 2305 2306 /* 2307 * This may look a bit non-sensical, but it is 2308 * actually quite logical. There are very few 2309 * peripheral drivers, and bloating every peripheral 2310 * structure with a pointer back to its parent 2311 * peripheral driver linker set entry would cost 2312 * more in the long run than doing this quick lookup. 2313 */ 2314 SET_FOREACH(pdrv, periphdriver_set) { 2315 if (strcmp((*pdrv)->driver_name, 2316 periph->periph_name) == 0) 2317 break; 2318 } 2319 2320 if (*pdrv == NULL) { 2321 cdm->status = CAM_DEV_MATCH_ERROR; 2322 return(0); 2323 } 2324 2325 cdm->pos.cookie.pdrv = pdrv; 2326 /* 2327 * The periph generation slot does double duty, as 2328 * does the periph pointer slot. They are used for 2329 * both edt and pdrv lookups and positioning. 2330 */ 2331 cdm->pos.cookie.periph = periph; 2332 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2333 (*pdrv)->generation; 2334 cdm->status = CAM_DEV_MATCH_MORE; 2335 return(0); 2336 } 2337 2338 j = cdm->num_matches; 2339 cdm->num_matches++; 2340 cdm->matches[j].type = DEV_MATCH_PERIPH; 2341 cdm->matches[j].result.periph_result.path_id = 2342 periph->path->bus->path_id; 2343 2344 /* 2345 * The transport layer peripheral doesn't have a target or 2346 * lun. 2347 */ 2348 if (periph->path->target) 2349 cdm->matches[j].result.periph_result.target_id = 2350 periph->path->target->target_id; 2351 else 2352 cdm->matches[j].result.periph_result.target_id = -1; 2353 2354 if (periph->path->device) 2355 cdm->matches[j].result.periph_result.target_lun = 2356 periph->path->device->lun_id; 2357 else 2358 cdm->matches[j].result.periph_result.target_lun = -1; 2359 2360 cdm->matches[j].result.periph_result.unit_number = 2361 periph->unit_number; 2362 strncpy(cdm->matches[j].result.periph_result.periph_name, 2363 periph->periph_name, DEV_IDLEN); 2364 } 2365 2366 return(1); 2367 } 2368 2369 static int 2370 xptperiphlistmatch(struct ccb_dev_match *cdm) 2371 { 2372 int ret; 2373 2374 cdm->num_matches = 0; 2375 2376 /* 2377 * At this point in the edt traversal function, we check the bus 2378 * list generation to make sure that no busses have been added or 2379 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2380 * For the peripheral driver list traversal function, however, we 2381 * don't have to worry about new peripheral driver types coming or 2382 * going; they're in a linker set, and therefore can't change 2383 * without a recompile. 2384 */ 2385 2386 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2387 && (cdm->pos.cookie.pdrv != NULL)) 2388 ret = xptpdrvtraverse( 2389 (struct periph_driver **)cdm->pos.cookie.pdrv, 2390 xptplistpdrvfunc, cdm); 2391 else 2392 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2393 2394 /* 2395 * If we get back 0, that means that we had to stop before fully 2396 * traversing the peripheral driver tree. It also means that one of 2397 * the subroutines has set the status field to the proper value. If 2398 * we get back 1, we've fully traversed the EDT and copied out any 2399 * matching entries. 2400 */ 2401 if (ret == 1) 2402 cdm->status = CAM_DEV_MATCH_LAST; 2403 2404 return(ret); 2405 } 2406 2407 static int 2408 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2409 { 2410 struct cam_eb *bus, *next_bus; 2411 int retval; 2412 2413 retval = 1; 2414 2415 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2416 bus != NULL; 2417 bus = next_bus) { 2418 next_bus = TAILQ_NEXT(bus, links); 2419 2420 retval = tr_func(bus, arg); 2421 if (retval == 0) 2422 return(retval); 2423 } 2424 2425 return(retval); 2426 } 2427 2428 static int 2429 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2430 xpt_targetfunc_t *tr_func, void *arg) 2431 { 2432 struct cam_et *target, *next_target; 2433 int retval; 2434 2435 retval = 1; 2436 for (target = (start_target ? start_target : 2437 TAILQ_FIRST(&bus->et_entries)); 2438 target != NULL; target = next_target) { 2439 2440 next_target = TAILQ_NEXT(target, links); 2441 2442 retval = tr_func(target, arg); 2443 2444 if (retval == 0) 2445 return(retval); 2446 } 2447 2448 return(retval); 2449 } 2450 2451 static int 2452 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2453 xpt_devicefunc_t *tr_func, void *arg) 2454 { 2455 struct cam_ed *device, *next_device; 2456 int retval; 2457 2458 retval = 1; 2459 for (device = (start_device ? start_device : 2460 TAILQ_FIRST(&target->ed_entries)); 2461 device != NULL; 2462 device = next_device) { 2463 2464 next_device = TAILQ_NEXT(device, links); 2465 2466 retval = tr_func(device, arg); 2467 2468 if (retval == 0) 2469 return(retval); 2470 } 2471 2472 return(retval); 2473 } 2474 2475 static int 2476 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2477 xpt_periphfunc_t *tr_func, void *arg) 2478 { 2479 struct cam_periph *periph, *next_periph; 2480 int retval; 2481 2482 retval = 1; 2483 2484 for (periph = (start_periph ? start_periph : 2485 SLIST_FIRST(&device->periphs)); 2486 periph != NULL; 2487 periph = next_periph) { 2488 2489 next_periph = SLIST_NEXT(periph, periph_links); 2490 2491 retval = tr_func(periph, arg); 2492 if (retval == 0) 2493 return(retval); 2494 } 2495 2496 return(retval); 2497 } 2498 2499 static int 2500 xptpdrvtraverse(struct periph_driver **start_pdrv, 2501 xpt_pdrvfunc_t *tr_func, void *arg) 2502 { 2503 struct periph_driver **pdrv; 2504 int retval; 2505 2506 retval = 1; 2507 2508 /* 2509 * We don't traverse the peripheral driver list like we do the 2510 * other lists, because it is a linker set, and therefore cannot be 2511 * changed during runtime. If the peripheral driver list is ever 2512 * re-done to be something other than a linker set (i.e. it can 2513 * change while the system is running), the list traversal should 2514 * be modified to work like the other traversal functions. 2515 */ 2516 SET_FOREACH(pdrv, periphdriver_set) { 2517 if (start_pdrv == NULL || start_pdrv == pdrv) { 2518 retval = tr_func(pdrv, arg); 2519 if (retval == 0) 2520 return(retval); 2521 start_pdrv = NULL; /* traverse remainder */ 2522 } 2523 } 2524 return(retval); 2525 } 2526 2527 static int 2528 xptpdperiphtraverse(struct periph_driver **pdrv, 2529 struct cam_periph *start_periph, 2530 xpt_periphfunc_t *tr_func, void *arg) 2531 { 2532 struct cam_periph *periph, *next_periph; 2533 int retval; 2534 2535 retval = 1; 2536 2537 for (periph = (start_periph ? start_periph : 2538 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2539 periph = next_periph) { 2540 2541 next_periph = TAILQ_NEXT(periph, unit_links); 2542 2543 retval = tr_func(periph, arg); 2544 if (retval == 0) 2545 return(retval); 2546 } 2547 return(retval); 2548 } 2549 2550 static int 2551 xptdefbusfunc(struct cam_eb *bus, void *arg) 2552 { 2553 struct xpt_traverse_config *tr_config; 2554 2555 tr_config = (struct xpt_traverse_config *)arg; 2556 2557 if (tr_config->depth == XPT_DEPTH_BUS) { 2558 xpt_busfunc_t *tr_func; 2559 2560 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2561 2562 return(tr_func(bus, tr_config->tr_arg)); 2563 } else 2564 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2565 } 2566 2567 static int 2568 xptdeftargetfunc(struct cam_et *target, void *arg) 2569 { 2570 struct xpt_traverse_config *tr_config; 2571 2572 tr_config = (struct xpt_traverse_config *)arg; 2573 2574 if (tr_config->depth == XPT_DEPTH_TARGET) { 2575 xpt_targetfunc_t *tr_func; 2576 2577 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2578 2579 return(tr_func(target, tr_config->tr_arg)); 2580 } else 2581 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2582 } 2583 2584 static int 2585 xptdefdevicefunc(struct cam_ed *device, void *arg) 2586 { 2587 struct xpt_traverse_config *tr_config; 2588 2589 tr_config = (struct xpt_traverse_config *)arg; 2590 2591 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2592 xpt_devicefunc_t *tr_func; 2593 2594 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2595 2596 return(tr_func(device, tr_config->tr_arg)); 2597 } else 2598 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2599 } 2600 2601 static int 2602 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2603 { 2604 struct xpt_traverse_config *tr_config; 2605 xpt_periphfunc_t *tr_func; 2606 2607 tr_config = (struct xpt_traverse_config *)arg; 2608 2609 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2610 2611 /* 2612 * Unlike the other default functions, we don't check for depth 2613 * here. The peripheral driver level is the last level in the EDT, 2614 * so if we're here, we should execute the function in question. 2615 */ 2616 return(tr_func(periph, tr_config->tr_arg)); 2617 } 2618 2619 /* 2620 * Execute the given function for every bus in the EDT. 2621 */ 2622 static int 2623 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2624 { 2625 struct xpt_traverse_config tr_config; 2626 2627 tr_config.depth = XPT_DEPTH_BUS; 2628 tr_config.tr_func = tr_func; 2629 tr_config.tr_arg = arg; 2630 2631 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2632 } 2633 2634 #ifdef notusedyet 2635 /* 2636 * Execute the given function for every target in the EDT. 2637 */ 2638 static int 2639 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2640 { 2641 struct xpt_traverse_config tr_config; 2642 2643 tr_config.depth = XPT_DEPTH_TARGET; 2644 tr_config.tr_func = tr_func; 2645 tr_config.tr_arg = arg; 2646 2647 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2648 } 2649 #endif /* notusedyet */ 2650 2651 /* 2652 * Execute the given function for every device in the EDT. 2653 */ 2654 static int 2655 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2656 { 2657 struct xpt_traverse_config tr_config; 2658 2659 tr_config.depth = XPT_DEPTH_DEVICE; 2660 tr_config.tr_func = tr_func; 2661 tr_config.tr_arg = arg; 2662 2663 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2664 } 2665 2666 #ifdef notusedyet 2667 /* 2668 * Execute the given function for every peripheral in the EDT. 2669 */ 2670 static int 2671 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2672 { 2673 struct xpt_traverse_config tr_config; 2674 2675 tr_config.depth = XPT_DEPTH_PERIPH; 2676 tr_config.tr_func = tr_func; 2677 tr_config.tr_arg = arg; 2678 2679 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2680 } 2681 #endif /* notusedyet */ 2682 2683 static int 2684 xptsetasyncfunc(struct cam_ed *device, void *arg) 2685 { 2686 struct cam_path path; 2687 struct ccb_getdev cgd; 2688 struct async_node *cur_entry; 2689 2690 cur_entry = (struct async_node *)arg; 2691 2692 /* 2693 * Don't report unconfigured devices (Wildcard devs, 2694 * devices only for target mode, device instances 2695 * that have been invalidated but are waiting for 2696 * their last reference count to be released). 2697 */ 2698 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2699 return (1); 2700 2701 xpt_compile_path(&path, 2702 NULL, 2703 device->target->bus->path_id, 2704 device->target->target_id, 2705 device->lun_id); 2706 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2707 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2708 xpt_action((union ccb *)&cgd); 2709 cur_entry->callback(cur_entry->callback_arg, 2710 AC_FOUND_DEVICE, 2711 &path, &cgd); 2712 xpt_release_path(&path); 2713 2714 return(1); 2715 } 2716 2717 static int 2718 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2719 { 2720 struct cam_path path; 2721 struct ccb_pathinq cpi; 2722 struct async_node *cur_entry; 2723 2724 cur_entry = (struct async_node *)arg; 2725 2726 xpt_compile_path(&path, /*periph*/NULL, 2727 bus->sim->path_id, 2728 CAM_TARGET_WILDCARD, 2729 CAM_LUN_WILDCARD); 2730 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2731 cpi.ccb_h.func_code = XPT_PATH_INQ; 2732 xpt_action((union ccb *)&cpi); 2733 cur_entry->callback(cur_entry->callback_arg, 2734 AC_PATH_REGISTERED, 2735 &path, &cpi); 2736 xpt_release_path(&path); 2737 2738 return(1); 2739 } 2740 2741 void 2742 xpt_action(union ccb *start_ccb) 2743 { 2744 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2745 2746 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2747 2748 crit_enter(); 2749 2750 switch (start_ccb->ccb_h.func_code) { 2751 case XPT_SCSI_IO: 2752 { 2753 #ifdef CAMDEBUG 2754 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2755 struct cam_path *path; 2756 2757 path = start_ccb->ccb_h.path; 2758 #endif 2759 2760 /* 2761 * For the sake of compatibility with SCSI-1 2762 * devices that may not understand the identify 2763 * message, we include lun information in the 2764 * second byte of all commands. SCSI-1 specifies 2765 * that luns are a 3 bit value and reserves only 3 2766 * bits for lun information in the CDB. Later 2767 * revisions of the SCSI spec allow for more than 8 2768 * luns, but have deprecated lun information in the 2769 * CDB. So, if the lun won't fit, we must omit. 2770 * 2771 * Also be aware that during initial probing for devices, 2772 * the inquiry information is unknown but initialized to 0. 2773 * This means that this code will be exercised while probing 2774 * devices with an ANSI revision greater than 2. 2775 */ 2776 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2777 && start_ccb->ccb_h.target_lun < 8 2778 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2779 2780 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2781 start_ccb->ccb_h.target_lun << 5; 2782 } 2783 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2784 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2785 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2786 &path->device->inq_data), 2787 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2788 cdb_str, sizeof(cdb_str)))); 2789 /* FALLTHROUGH */ 2790 } 2791 case XPT_TARGET_IO: 2792 case XPT_CONT_TARGET_IO: 2793 start_ccb->csio.sense_resid = 0; 2794 start_ccb->csio.resid = 0; 2795 /* FALLTHROUGH */ 2796 case XPT_RESET_DEV: 2797 case XPT_ENG_EXEC: 2798 { 2799 struct cam_path *path; 2800 int runq; 2801 2802 path = start_ccb->ccb_h.path; 2803 2804 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2805 if (path->device->qfrozen_cnt == 0) 2806 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2807 else 2808 runq = 0; 2809 if (runq != 0) 2810 xpt_run_dev_sendq(path->bus); 2811 break; 2812 } 2813 case XPT_SET_TRAN_SETTINGS: 2814 { 2815 xpt_set_transfer_settings(&start_ccb->cts, 2816 start_ccb->ccb_h.path->device, 2817 /*async_update*/FALSE); 2818 break; 2819 } 2820 case XPT_CALC_GEOMETRY: 2821 { 2822 struct cam_sim *sim; 2823 2824 /* Filter out garbage */ 2825 if (start_ccb->ccg.block_size == 0 2826 || start_ccb->ccg.volume_size == 0) { 2827 start_ccb->ccg.cylinders = 0; 2828 start_ccb->ccg.heads = 0; 2829 start_ccb->ccg.secs_per_track = 0; 2830 start_ccb->ccb_h.status = CAM_REQ_CMP; 2831 break; 2832 } 2833 sim = start_ccb->ccb_h.path->bus->sim; 2834 (*(sim->sim_action))(sim, start_ccb); 2835 break; 2836 } 2837 case XPT_ABORT: 2838 { 2839 union ccb* abort_ccb; 2840 2841 abort_ccb = start_ccb->cab.abort_ccb; 2842 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2843 2844 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2845 struct cam_ccbq *ccbq; 2846 2847 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 2848 cam_ccbq_remove_ccb(ccbq, abort_ccb); 2849 abort_ccb->ccb_h.status = 2850 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2851 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2852 xpt_done(abort_ccb); 2853 start_ccb->ccb_h.status = CAM_REQ_CMP; 2854 break; 2855 } 2856 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 2857 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 2858 /* 2859 * We've caught this ccb en route to 2860 * the SIM. Flag it for abort and the 2861 * SIM will do so just before starting 2862 * real work on the CCB. 2863 */ 2864 abort_ccb->ccb_h.status = 2865 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 2866 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 2867 start_ccb->ccb_h.status = CAM_REQ_CMP; 2868 break; 2869 } 2870 } 2871 if (XPT_FC_IS_QUEUED(abort_ccb) 2872 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 2873 /* 2874 * It's already completed but waiting 2875 * for our SWI to get to it. 2876 */ 2877 start_ccb->ccb_h.status = CAM_UA_ABORT; 2878 break; 2879 } 2880 /* 2881 * If we weren't able to take care of the abort request 2882 * in the XPT, pass the request down to the SIM for processing. 2883 */ 2884 /* FALLTHROUGH */ 2885 } 2886 case XPT_ACCEPT_TARGET_IO: 2887 case XPT_EN_LUN: 2888 case XPT_IMMED_NOTIFY: 2889 case XPT_NOTIFY_ACK: 2890 case XPT_GET_TRAN_SETTINGS: 2891 case XPT_RESET_BUS: 2892 { 2893 struct cam_sim *sim; 2894 2895 sim = start_ccb->ccb_h.path->bus->sim; 2896 (*(sim->sim_action))(sim, start_ccb); 2897 break; 2898 } 2899 case XPT_PATH_INQ: 2900 { 2901 struct cam_sim *sim; 2902 2903 sim = start_ccb->ccb_h.path->bus->sim; 2904 (*(sim->sim_action))(sim, start_ccb); 2905 break; 2906 } 2907 case XPT_PATH_STATS: 2908 start_ccb->cpis.last_reset = 2909 start_ccb->ccb_h.path->bus->last_reset; 2910 start_ccb->ccb_h.status = CAM_REQ_CMP; 2911 break; 2912 case XPT_GDEV_TYPE: 2913 { 2914 struct cam_ed *dev; 2915 2916 dev = start_ccb->ccb_h.path->device; 2917 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2918 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2919 } else { 2920 struct ccb_getdev *cgd; 2921 struct cam_eb *bus; 2922 struct cam_et *tar; 2923 2924 cgd = &start_ccb->cgd; 2925 bus = cgd->ccb_h.path->bus; 2926 tar = cgd->ccb_h.path->target; 2927 cgd->inq_data = dev->inq_data; 2928 cgd->ccb_h.status = CAM_REQ_CMP; 2929 cgd->serial_num_len = dev->serial_num_len; 2930 if ((dev->serial_num_len > 0) 2931 && (dev->serial_num != NULL)) 2932 bcopy(dev->serial_num, cgd->serial_num, 2933 dev->serial_num_len); 2934 } 2935 break; 2936 } 2937 case XPT_GDEV_STATS: 2938 { 2939 struct cam_ed *dev; 2940 2941 dev = start_ccb->ccb_h.path->device; 2942 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 2943 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 2944 } else { 2945 struct ccb_getdevstats *cgds; 2946 struct cam_eb *bus; 2947 struct cam_et *tar; 2948 2949 cgds = &start_ccb->cgds; 2950 bus = cgds->ccb_h.path->bus; 2951 tar = cgds->ccb_h.path->target; 2952 cgds->dev_openings = dev->ccbq.dev_openings; 2953 cgds->dev_active = dev->ccbq.dev_active; 2954 cgds->devq_openings = dev->ccbq.devq_openings; 2955 cgds->devq_queued = dev->ccbq.queue.entries; 2956 cgds->held = dev->ccbq.held; 2957 cgds->last_reset = tar->last_reset; 2958 cgds->maxtags = dev->quirk->maxtags; 2959 cgds->mintags = dev->quirk->mintags; 2960 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 2961 cgds->last_reset = bus->last_reset; 2962 cgds->ccb_h.status = CAM_REQ_CMP; 2963 } 2964 break; 2965 } 2966 case XPT_GDEVLIST: 2967 { 2968 struct cam_periph *nperiph; 2969 struct periph_list *periph_head; 2970 struct ccb_getdevlist *cgdl; 2971 int i; 2972 struct cam_ed *device; 2973 int found; 2974 2975 2976 found = 0; 2977 2978 /* 2979 * Don't want anyone mucking with our data. 2980 */ 2981 device = start_ccb->ccb_h.path->device; 2982 periph_head = &device->periphs; 2983 cgdl = &start_ccb->cgdl; 2984 2985 /* 2986 * Check and see if the list has changed since the user 2987 * last requested a list member. If so, tell them that the 2988 * list has changed, and therefore they need to start over 2989 * from the beginning. 2990 */ 2991 if ((cgdl->index != 0) && 2992 (cgdl->generation != device->generation)) { 2993 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 2994 break; 2995 } 2996 2997 /* 2998 * Traverse the list of peripherals and attempt to find 2999 * the requested peripheral. 3000 */ 3001 for (nperiph = periph_head->slh_first, i = 0; 3002 (nperiph != NULL) && (i <= cgdl->index); 3003 nperiph = nperiph->periph_links.sle_next, i++) { 3004 if (i == cgdl->index) { 3005 strncpy(cgdl->periph_name, 3006 nperiph->periph_name, 3007 DEV_IDLEN); 3008 cgdl->unit_number = nperiph->unit_number; 3009 found = 1; 3010 } 3011 } 3012 if (found == 0) { 3013 cgdl->status = CAM_GDEVLIST_ERROR; 3014 break; 3015 } 3016 3017 if (nperiph == NULL) 3018 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3019 else 3020 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3021 3022 cgdl->index++; 3023 cgdl->generation = device->generation; 3024 3025 cgdl->ccb_h.status = CAM_REQ_CMP; 3026 break; 3027 } 3028 case XPT_DEV_MATCH: 3029 { 3030 dev_pos_type position_type; 3031 struct ccb_dev_match *cdm; 3032 int ret; 3033 3034 cdm = &start_ccb->cdm; 3035 3036 /* 3037 * Prevent EDT changes while we traverse it. 3038 */ 3039 /* 3040 * There are two ways of getting at information in the EDT. 3041 * The first way is via the primary EDT tree. It starts 3042 * with a list of busses, then a list of targets on a bus, 3043 * then devices/luns on a target, and then peripherals on a 3044 * device/lun. The "other" way is by the peripheral driver 3045 * lists. The peripheral driver lists are organized by 3046 * peripheral driver. (obviously) So it makes sense to 3047 * use the peripheral driver list if the user is looking 3048 * for something like "da1", or all "da" devices. If the 3049 * user is looking for something on a particular bus/target 3050 * or lun, it's generally better to go through the EDT tree. 3051 */ 3052 3053 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3054 position_type = cdm->pos.position_type; 3055 else { 3056 int i; 3057 3058 position_type = CAM_DEV_POS_NONE; 3059 3060 for (i = 0; i < cdm->num_patterns; i++) { 3061 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3062 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3063 position_type = CAM_DEV_POS_EDT; 3064 break; 3065 } 3066 } 3067 3068 if (cdm->num_patterns == 0) 3069 position_type = CAM_DEV_POS_EDT; 3070 else if (position_type == CAM_DEV_POS_NONE) 3071 position_type = CAM_DEV_POS_PDRV; 3072 } 3073 3074 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3075 case CAM_DEV_POS_EDT: 3076 ret = xptedtmatch(cdm); 3077 break; 3078 case CAM_DEV_POS_PDRV: 3079 ret = xptperiphlistmatch(cdm); 3080 break; 3081 default: 3082 cdm->status = CAM_DEV_MATCH_ERROR; 3083 break; 3084 } 3085 3086 if (cdm->status == CAM_DEV_MATCH_ERROR) 3087 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3088 else 3089 start_ccb->ccb_h.status = CAM_REQ_CMP; 3090 3091 break; 3092 } 3093 case XPT_SASYNC_CB: 3094 { 3095 struct ccb_setasync *csa; 3096 struct async_node *cur_entry; 3097 struct async_list *async_head; 3098 u_int32_t added; 3099 3100 csa = &start_ccb->csa; 3101 added = csa->event_enable; 3102 async_head = &csa->ccb_h.path->device->asyncs; 3103 3104 /* 3105 * If there is already an entry for us, simply 3106 * update it. 3107 */ 3108 cur_entry = SLIST_FIRST(async_head); 3109 while (cur_entry != NULL) { 3110 if ((cur_entry->callback_arg == csa->callback_arg) 3111 && (cur_entry->callback == csa->callback)) 3112 break; 3113 cur_entry = SLIST_NEXT(cur_entry, links); 3114 } 3115 3116 if (cur_entry != NULL) { 3117 /* 3118 * If the request has no flags set, 3119 * remove the entry. 3120 */ 3121 added &= ~cur_entry->event_enable; 3122 if (csa->event_enable == 0) { 3123 SLIST_REMOVE(async_head, cur_entry, 3124 async_node, links); 3125 csa->ccb_h.path->device->refcount--; 3126 kfree(cur_entry, M_DEVBUF); 3127 } else { 3128 cur_entry->event_enable = csa->event_enable; 3129 } 3130 } else { 3131 cur_entry = kmalloc(sizeof(*cur_entry), 3132 M_DEVBUF, M_INTWAIT); 3133 cur_entry->event_enable = csa->event_enable; 3134 cur_entry->callback_arg = csa->callback_arg; 3135 cur_entry->callback = csa->callback; 3136 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3137 csa->ccb_h.path->device->refcount++; 3138 } 3139 3140 if ((added & AC_FOUND_DEVICE) != 0) { 3141 /* 3142 * Get this peripheral up to date with all 3143 * the currently existing devices. 3144 */ 3145 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3146 } 3147 if ((added & AC_PATH_REGISTERED) != 0) { 3148 /* 3149 * Get this peripheral up to date with all 3150 * the currently existing busses. 3151 */ 3152 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3153 } 3154 start_ccb->ccb_h.status = CAM_REQ_CMP; 3155 break; 3156 } 3157 case XPT_REL_SIMQ: 3158 { 3159 struct ccb_relsim *crs; 3160 struct cam_ed *dev; 3161 3162 crs = &start_ccb->crs; 3163 dev = crs->ccb_h.path->device; 3164 if (dev == NULL) { 3165 3166 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3167 break; 3168 } 3169 3170 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3171 3172 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3173 3174 /* Don't ever go below one opening */ 3175 if (crs->openings > 0) { 3176 xpt_dev_ccbq_resize(crs->ccb_h.path, 3177 crs->openings); 3178 3179 if (bootverbose) { 3180 xpt_print_path(crs->ccb_h.path); 3181 kprintf("tagged openings " 3182 "now %d\n", 3183 crs->openings); 3184 } 3185 } 3186 } 3187 } 3188 3189 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3190 3191 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3192 3193 /* 3194 * Just extend the old timeout and decrement 3195 * the freeze count so that a single timeout 3196 * is sufficient for releasing the queue. 3197 */ 3198 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3199 callout_stop(&dev->c_handle); 3200 } else { 3201 3202 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3203 } 3204 3205 callout_reset(&dev->c_handle, 3206 (crs->release_timeout * hz) / 1000, 3207 xpt_release_devq_timeout, dev); 3208 3209 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3210 3211 } 3212 3213 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3214 3215 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3216 /* 3217 * Decrement the freeze count so that a single 3218 * completion is still sufficient to unfreeze 3219 * the queue. 3220 */ 3221 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3222 } else { 3223 3224 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3225 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3226 } 3227 } 3228 3229 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3230 3231 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3232 || (dev->ccbq.dev_active == 0)) { 3233 3234 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3235 } else { 3236 3237 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3238 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3239 } 3240 } 3241 3242 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3243 3244 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3245 /*run_queue*/TRUE); 3246 } 3247 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3248 start_ccb->ccb_h.status = CAM_REQ_CMP; 3249 break; 3250 } 3251 case XPT_SCAN_BUS: 3252 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3253 break; 3254 case XPT_SCAN_LUN: 3255 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3256 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3257 start_ccb); 3258 break; 3259 case XPT_DEBUG: { 3260 #ifdef CAMDEBUG 3261 #ifdef CAM_DEBUG_DELAY 3262 cam_debug_delay = CAM_DEBUG_DELAY; 3263 #endif 3264 cam_dflags = start_ccb->cdbg.flags; 3265 if (cam_dpath != NULL) { 3266 xpt_free_path(cam_dpath); 3267 cam_dpath = NULL; 3268 } 3269 3270 if (cam_dflags != CAM_DEBUG_NONE) { 3271 if (xpt_create_path(&cam_dpath, xpt_periph, 3272 start_ccb->ccb_h.path_id, 3273 start_ccb->ccb_h.target_id, 3274 start_ccb->ccb_h.target_lun) != 3275 CAM_REQ_CMP) { 3276 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3277 cam_dflags = CAM_DEBUG_NONE; 3278 } else { 3279 start_ccb->ccb_h.status = CAM_REQ_CMP; 3280 xpt_print_path(cam_dpath); 3281 kprintf("debugging flags now %x\n", cam_dflags); 3282 } 3283 } else { 3284 cam_dpath = NULL; 3285 start_ccb->ccb_h.status = CAM_REQ_CMP; 3286 } 3287 #else /* !CAMDEBUG */ 3288 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3289 #endif /* CAMDEBUG */ 3290 break; 3291 } 3292 case XPT_NOOP: 3293 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3294 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3295 start_ccb->ccb_h.status = CAM_REQ_CMP; 3296 break; 3297 default: 3298 case XPT_SDEV_TYPE: 3299 case XPT_TERM_IO: 3300 case XPT_ENG_INQ: 3301 /* XXX Implement */ 3302 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3303 break; 3304 } 3305 crit_exit(); 3306 } 3307 3308 void 3309 xpt_polled_action(union ccb *start_ccb) 3310 { 3311 u_int32_t timeout; 3312 struct cam_sim *sim; 3313 struct cam_devq *devq; 3314 struct cam_ed *dev; 3315 3316 timeout = start_ccb->ccb_h.timeout; 3317 sim = start_ccb->ccb_h.path->bus->sim; 3318 devq = sim->devq; 3319 dev = start_ccb->ccb_h.path->device; 3320 3321 crit_enter(); 3322 3323 /* 3324 * Steal an opening so that no other queued requests 3325 * can get it before us while we simulate interrupts. 3326 */ 3327 dev->ccbq.devq_openings--; 3328 dev->ccbq.dev_openings--; 3329 3330 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3331 && (--timeout > 0)) { 3332 DELAY(1000); 3333 (*(sim->sim_poll))(sim); 3334 swi_camnet(NULL, NULL); 3335 swi_cambio(NULL, NULL); 3336 } 3337 3338 dev->ccbq.devq_openings++; 3339 dev->ccbq.dev_openings++; 3340 3341 if (timeout != 0) { 3342 xpt_action(start_ccb); 3343 while(--timeout > 0) { 3344 (*(sim->sim_poll))(sim); 3345 swi_camnet(NULL, NULL); 3346 swi_cambio(NULL, NULL); 3347 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3348 != CAM_REQ_INPROG) 3349 break; 3350 DELAY(1000); 3351 } 3352 if (timeout == 0) { 3353 /* 3354 * XXX Is it worth adding a sim_timeout entry 3355 * point so we can attempt recovery? If 3356 * this is only used for dumps, I don't think 3357 * it is. 3358 */ 3359 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3360 } 3361 } else { 3362 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3363 } 3364 crit_exit(); 3365 } 3366 3367 /* 3368 * Schedule a peripheral driver to receive a ccb when it's 3369 * target device has space for more transactions. 3370 */ 3371 void 3372 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3373 { 3374 struct cam_ed *device; 3375 int runq; 3376 3377 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3378 device = perph->path->device; 3379 crit_enter(); 3380 if (periph_is_queued(perph)) { 3381 /* Simply reorder based on new priority */ 3382 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3383 (" change priority to %d\n", new_priority)); 3384 if (new_priority < perph->pinfo.priority) { 3385 camq_change_priority(&device->drvq, 3386 perph->pinfo.index, 3387 new_priority); 3388 } 3389 runq = 0; 3390 } else { 3391 /* New entry on the queue */ 3392 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3393 (" added periph to queue\n")); 3394 perph->pinfo.priority = new_priority; 3395 perph->pinfo.generation = ++device->drvq.generation; 3396 camq_insert(&device->drvq, &perph->pinfo); 3397 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3398 } 3399 crit_exit(); 3400 if (runq != 0) { 3401 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3402 (" calling xpt_run_devq\n")); 3403 xpt_run_dev_allocq(perph->path->bus); 3404 } 3405 } 3406 3407 3408 /* 3409 * Schedule a device to run on a given queue. 3410 * If the device was inserted as a new entry on the queue, 3411 * return 1 meaning the device queue should be run. If we 3412 * were already queued, implying someone else has already 3413 * started the queue, return 0 so the caller doesn't attempt 3414 * to run the queue. Must be run in a critical section. 3415 */ 3416 static int 3417 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3418 u_int32_t new_priority) 3419 { 3420 int retval; 3421 u_int32_t old_priority; 3422 3423 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3424 3425 old_priority = pinfo->priority; 3426 3427 /* 3428 * Are we already queued? 3429 */ 3430 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3431 /* Simply reorder based on new priority */ 3432 if (new_priority < old_priority) { 3433 camq_change_priority(queue, pinfo->index, 3434 new_priority); 3435 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3436 ("changed priority to %d\n", 3437 new_priority)); 3438 } 3439 retval = 0; 3440 } else { 3441 /* New entry on the queue */ 3442 if (new_priority < old_priority) 3443 pinfo->priority = new_priority; 3444 3445 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3446 ("Inserting onto queue\n")); 3447 pinfo->generation = ++queue->generation; 3448 camq_insert(queue, pinfo); 3449 retval = 1; 3450 } 3451 return (retval); 3452 } 3453 3454 static void 3455 xpt_run_dev_allocq(struct cam_eb *bus) 3456 { 3457 struct cam_devq *devq; 3458 3459 if ((devq = bus->sim->devq) == NULL) { 3460 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3461 return; 3462 } 3463 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3464 3465 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3466 (" qfrozen_cnt == 0x%x, entries == %d, " 3467 "openings == %d, active == %d\n", 3468 devq->alloc_queue.qfrozen_cnt, 3469 devq->alloc_queue.entries, 3470 devq->alloc_openings, 3471 devq->alloc_active)); 3472 3473 crit_enter(); 3474 devq->alloc_queue.qfrozen_cnt++; 3475 while ((devq->alloc_queue.entries > 0) 3476 && (devq->alloc_openings > 0) 3477 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3478 struct cam_ed_qinfo *qinfo; 3479 struct cam_ed *device; 3480 union ccb *work_ccb; 3481 struct cam_periph *drv; 3482 struct camq *drvq; 3483 3484 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3485 CAMQ_HEAD); 3486 device = qinfo->device; 3487 3488 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3489 ("running device %p\n", device)); 3490 3491 drvq = &device->drvq; 3492 3493 #ifdef CAMDEBUG 3494 if (drvq->entries <= 0) { 3495 panic("xpt_run_dev_allocq: " 3496 "Device on queue without any work to do"); 3497 } 3498 #endif 3499 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3500 devq->alloc_openings--; 3501 devq->alloc_active++; 3502 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3503 crit_exit(); 3504 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3505 drv->pinfo.priority); 3506 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3507 ("calling periph start\n")); 3508 drv->periph_start(drv, work_ccb); 3509 } else { 3510 /* 3511 * Malloc failure in alloc_ccb 3512 */ 3513 /* 3514 * XXX add us to a list to be run from free_ccb 3515 * if we don't have any ccbs active on this 3516 * device queue otherwise we may never get run 3517 * again. 3518 */ 3519 break; 3520 } 3521 3522 /* Raise IPL for possible insertion and test at top of loop */ 3523 crit_enter(); 3524 3525 if (drvq->entries > 0) { 3526 /* We have more work. Attempt to reschedule */ 3527 xpt_schedule_dev_allocq(bus, device); 3528 } 3529 } 3530 devq->alloc_queue.qfrozen_cnt--; 3531 crit_exit(); 3532 } 3533 3534 static void 3535 xpt_run_dev_sendq(struct cam_eb *bus) 3536 { 3537 struct cam_devq *devq; 3538 3539 if ((devq = bus->sim->devq) == NULL) { 3540 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3541 return; 3542 } 3543 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3544 3545 crit_enter(); 3546 devq->send_queue.qfrozen_cnt++; 3547 while ((devq->send_queue.entries > 0) 3548 && (devq->send_openings > 0)) { 3549 struct cam_ed_qinfo *qinfo; 3550 struct cam_ed *device; 3551 union ccb *work_ccb; 3552 struct cam_sim *sim; 3553 3554 if (devq->send_queue.qfrozen_cnt > 1) { 3555 break; 3556 } 3557 3558 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3559 CAMQ_HEAD); 3560 device = qinfo->device; 3561 3562 /* 3563 * If the device has been "frozen", don't attempt 3564 * to run it. 3565 */ 3566 if (device->qfrozen_cnt > 0) { 3567 continue; 3568 } 3569 3570 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3571 ("running device %p\n", device)); 3572 3573 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3574 if (work_ccb == NULL) { 3575 kprintf("device on run queue with no ccbs???\n"); 3576 continue; 3577 } 3578 3579 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3580 3581 if (num_highpower <= 0) { 3582 /* 3583 * We got a high power command, but we 3584 * don't have any available slots. Freeze 3585 * the device queue until we have a slot 3586 * available. 3587 */ 3588 device->qfrozen_cnt++; 3589 STAILQ_INSERT_TAIL(&highpowerq, 3590 &work_ccb->ccb_h, 3591 xpt_links.stqe); 3592 3593 continue; 3594 } else { 3595 /* 3596 * Consume a high power slot while 3597 * this ccb runs. 3598 */ 3599 num_highpower--; 3600 } 3601 } 3602 devq->active_dev = device; 3603 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3604 3605 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3606 3607 devq->send_openings--; 3608 devq->send_active++; 3609 3610 if (device->ccbq.queue.entries > 0) 3611 xpt_schedule_dev_sendq(bus, device); 3612 3613 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3614 /* 3615 * The client wants to freeze the queue 3616 * after this CCB is sent. 3617 */ 3618 device->qfrozen_cnt++; 3619 } 3620 3621 /* In Target mode, the peripheral driver knows best... */ 3622 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3623 if ((device->inq_flags & SID_CmdQue) != 0 3624 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3625 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3626 else 3627 /* 3628 * Clear this in case of a retried CCB that 3629 * failed due to a rejected tag. 3630 */ 3631 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3632 } 3633 3634 /* 3635 * Device queues can be shared among multiple sim instances 3636 * that reside on different busses. Use the SIM in the queue 3637 * CCB's path, rather than the one in the bus that was passed 3638 * into this function. 3639 */ 3640 sim = work_ccb->ccb_h.path->bus->sim; 3641 (*(sim->sim_action))(sim, work_ccb); 3642 3643 devq->active_dev = NULL; 3644 /* Raise IPL for possible insertion and test at top of loop */ 3645 } 3646 devq->send_queue.qfrozen_cnt--; 3647 crit_exit(); 3648 } 3649 3650 /* 3651 * This function merges stuff from the slave ccb into the master ccb, while 3652 * keeping important fields in the master ccb constant. 3653 */ 3654 void 3655 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3656 { 3657 /* 3658 * Pull fields that are valid for peripheral drivers to set 3659 * into the master CCB along with the CCB "payload". 3660 */ 3661 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3662 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3663 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3664 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3665 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3666 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3667 } 3668 3669 void 3670 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3671 { 3672 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3673 callout_init(&ccb_h->timeout_ch); 3674 ccb_h->pinfo.priority = priority; 3675 ccb_h->path = path; 3676 ccb_h->path_id = path->bus->path_id; 3677 if (path->target) 3678 ccb_h->target_id = path->target->target_id; 3679 else 3680 ccb_h->target_id = CAM_TARGET_WILDCARD; 3681 if (path->device) { 3682 ccb_h->target_lun = path->device->lun_id; 3683 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3684 } else { 3685 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3686 } 3687 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3688 ccb_h->flags = 0; 3689 } 3690 3691 /* Path manipulation functions */ 3692 cam_status 3693 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3694 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3695 { 3696 struct cam_path *path; 3697 cam_status status; 3698 3699 path = kmalloc(sizeof(*path), M_DEVBUF, M_INTWAIT); 3700 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3701 if (status != CAM_REQ_CMP) { 3702 kfree(path, M_DEVBUF); 3703 path = NULL; 3704 } 3705 *new_path_ptr = path; 3706 return (status); 3707 } 3708 3709 static cam_status 3710 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3711 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3712 { 3713 struct cam_eb *bus; 3714 struct cam_et *target; 3715 struct cam_ed *device; 3716 cam_status status; 3717 3718 status = CAM_REQ_CMP; /* Completed without error */ 3719 target = NULL; /* Wildcarded */ 3720 device = NULL; /* Wildcarded */ 3721 3722 /* 3723 * We will potentially modify the EDT, so block interrupts 3724 * that may attempt to create cam paths. 3725 */ 3726 crit_enter(); 3727 bus = xpt_find_bus(path_id); 3728 if (bus == NULL) { 3729 status = CAM_PATH_INVALID; 3730 } else { 3731 target = xpt_find_target(bus, target_id); 3732 if (target == NULL) { 3733 /* Create one */ 3734 struct cam_et *new_target; 3735 3736 new_target = xpt_alloc_target(bus, target_id); 3737 if (new_target == NULL) { 3738 status = CAM_RESRC_UNAVAIL; 3739 } else { 3740 target = new_target; 3741 } 3742 } 3743 if (target != NULL) { 3744 device = xpt_find_device(target, lun_id); 3745 if (device == NULL) { 3746 /* Create one */ 3747 struct cam_ed *new_device; 3748 3749 new_device = xpt_alloc_device(bus, 3750 target, 3751 lun_id); 3752 if (new_device == NULL) { 3753 status = CAM_RESRC_UNAVAIL; 3754 } else { 3755 device = new_device; 3756 } 3757 } 3758 } 3759 } 3760 crit_exit(); 3761 3762 /* 3763 * Only touch the user's data if we are successful. 3764 */ 3765 if (status == CAM_REQ_CMP) { 3766 new_path->periph = perph; 3767 new_path->bus = bus; 3768 new_path->target = target; 3769 new_path->device = device; 3770 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3771 } else { 3772 if (device != NULL) 3773 xpt_release_device(bus, target, device); 3774 if (target != NULL) 3775 xpt_release_target(bus, target); 3776 if (bus != NULL) 3777 xpt_release_bus(bus); 3778 } 3779 return (status); 3780 } 3781 3782 static void 3783 xpt_release_path(struct cam_path *path) 3784 { 3785 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3786 if (path->device != NULL) { 3787 xpt_release_device(path->bus, path->target, path->device); 3788 path->device = NULL; 3789 } 3790 if (path->target != NULL) { 3791 xpt_release_target(path->bus, path->target); 3792 path->target = NULL; 3793 } 3794 if (path->bus != NULL) { 3795 xpt_release_bus(path->bus); 3796 path->bus = NULL; 3797 } 3798 } 3799 3800 void 3801 xpt_free_path(struct cam_path *path) 3802 { 3803 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3804 xpt_release_path(path); 3805 kfree(path, M_DEVBUF); 3806 } 3807 3808 3809 /* 3810 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3811 * in path1, 2 for match with wildcards in path2. 3812 */ 3813 int 3814 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3815 { 3816 int retval = 0; 3817 3818 if (path1->bus != path2->bus) { 3819 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3820 retval = 1; 3821 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3822 retval = 2; 3823 else 3824 return (-1); 3825 } 3826 if (path1->target != path2->target) { 3827 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3828 if (retval == 0) 3829 retval = 1; 3830 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3831 retval = 2; 3832 else 3833 return (-1); 3834 } 3835 if (path1->device != path2->device) { 3836 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3837 if (retval == 0) 3838 retval = 1; 3839 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3840 retval = 2; 3841 else 3842 return (-1); 3843 } 3844 return (retval); 3845 } 3846 3847 void 3848 xpt_print_path(struct cam_path *path) 3849 { 3850 if (path == NULL) 3851 kprintf("(nopath): "); 3852 else { 3853 if (path->periph != NULL) 3854 kprintf("(%s%d:", path->periph->periph_name, 3855 path->periph->unit_number); 3856 else 3857 kprintf("(noperiph:"); 3858 3859 if (path->bus != NULL) 3860 kprintf("%s%d:%d:", path->bus->sim->sim_name, 3861 path->bus->sim->unit_number, 3862 path->bus->sim->bus_id); 3863 else 3864 kprintf("nobus:"); 3865 3866 if (path->target != NULL) 3867 kprintf("%d:", path->target->target_id); 3868 else 3869 kprintf("X:"); 3870 3871 if (path->device != NULL) 3872 kprintf("%d): ", path->device->lun_id); 3873 else 3874 kprintf("X): "); 3875 } 3876 } 3877 3878 path_id_t 3879 xpt_path_path_id(struct cam_path *path) 3880 { 3881 return(path->bus->path_id); 3882 } 3883 3884 target_id_t 3885 xpt_path_target_id(struct cam_path *path) 3886 { 3887 if (path->target != NULL) 3888 return (path->target->target_id); 3889 else 3890 return (CAM_TARGET_WILDCARD); 3891 } 3892 3893 lun_id_t 3894 xpt_path_lun_id(struct cam_path *path) 3895 { 3896 if (path->device != NULL) 3897 return (path->device->lun_id); 3898 else 3899 return (CAM_LUN_WILDCARD); 3900 } 3901 3902 struct cam_sim * 3903 xpt_path_sim(struct cam_path *path) 3904 { 3905 return (path->bus->sim); 3906 } 3907 3908 struct cam_periph* 3909 xpt_path_periph(struct cam_path *path) 3910 { 3911 return (path->periph); 3912 } 3913 3914 /* 3915 * Release a CAM control block for the caller. Remit the cost of the structure 3916 * to the device referenced by the path. If the this device had no 'credits' 3917 * and peripheral drivers have registered async callbacks for this notification 3918 * call them now. 3919 */ 3920 void 3921 xpt_release_ccb(union ccb *free_ccb) 3922 { 3923 struct cam_path *path; 3924 struct cam_ed *device; 3925 struct cam_eb *bus; 3926 3927 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 3928 path = free_ccb->ccb_h.path; 3929 device = path->device; 3930 bus = path->bus; 3931 crit_enter(); 3932 cam_ccbq_release_opening(&device->ccbq); 3933 if (xpt_ccb_count > xpt_max_ccbs) { 3934 xpt_free_ccb(free_ccb); 3935 xpt_ccb_count--; 3936 } else { 3937 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 3938 } 3939 if (bus->sim->devq) { 3940 bus->sim->devq->alloc_openings++; 3941 bus->sim->devq->alloc_active--; 3942 } 3943 /* XXX Turn this into an inline function - xpt_run_device?? */ 3944 if ((device_is_alloc_queued(device) == 0) 3945 && (device->drvq.entries > 0)) { 3946 xpt_schedule_dev_allocq(bus, device); 3947 } 3948 crit_exit(); 3949 if (bus->sim->devq && dev_allocq_is_runnable(bus->sim->devq)) 3950 xpt_run_dev_allocq(bus); 3951 } 3952 3953 /* Functions accessed by SIM drivers */ 3954 3955 /* 3956 * A sim structure, listing the SIM entry points and instance 3957 * identification info is passed to xpt_bus_register to hook the SIM 3958 * into the CAM framework. xpt_bus_register creates a cam_eb entry 3959 * for this new bus and places it in the array of busses and assigns 3960 * it a path_id. The path_id may be influenced by "hard wiring" 3961 * information specified by the user. Once interrupt services are 3962 * availible, the bus will be probed. 3963 */ 3964 int32_t 3965 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 3966 { 3967 struct cam_eb *new_bus; 3968 struct cam_eb *old_bus; 3969 struct ccb_pathinq cpi; 3970 3971 sim->bus_id = bus; 3972 new_bus = kmalloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT); 3973 3974 if (strcmp(sim->sim_name, "xpt") != 0) { 3975 sim->path_id = 3976 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 3977 } 3978 3979 TAILQ_INIT(&new_bus->et_entries); 3980 new_bus->path_id = sim->path_id; 3981 new_bus->sim = sim; 3982 ++sim->refcount; 3983 timevalclear(&new_bus->last_reset); 3984 new_bus->flags = 0; 3985 new_bus->refcount = 1; /* Held until a bus_deregister event */ 3986 new_bus->generation = 0; 3987 crit_enter(); 3988 old_bus = TAILQ_FIRST(&xpt_busses); 3989 while (old_bus != NULL 3990 && old_bus->path_id < new_bus->path_id) 3991 old_bus = TAILQ_NEXT(old_bus, links); 3992 if (old_bus != NULL) 3993 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 3994 else 3995 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 3996 bus_generation++; 3997 crit_exit(); 3998 3999 /* Notify interested parties */ 4000 if (sim->path_id != CAM_XPT_PATH_ID) { 4001 struct cam_path path; 4002 4003 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4004 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4005 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4006 cpi.ccb_h.func_code = XPT_PATH_INQ; 4007 xpt_action((union ccb *)&cpi); 4008 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi); 4009 xpt_release_path(&path); 4010 } 4011 return (CAM_SUCCESS); 4012 } 4013 4014 /* 4015 * Deregister a bus. We must clean out all transactions pending on the bus. 4016 * This routine is typically called prior to cam_sim_free() (e.g. see 4017 * dev/usbmisc/umass/umass.c) 4018 */ 4019 int32_t 4020 xpt_bus_deregister(path_id_t pathid) 4021 { 4022 struct cam_path bus_path; 4023 cam_status status; 4024 4025 status = xpt_compile_path(&bus_path, NULL, pathid, 4026 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4027 if (status != CAM_REQ_CMP) 4028 return (status); 4029 4030 /* 4031 * This should clear out all pending requests and timeouts, but 4032 * the ccb's may be queued to a software interrupt. 4033 * 4034 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4035 * and it really ought to. 4036 */ 4037 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4038 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4039 4040 /* make sure all responses have been processed */ 4041 camisr(&cam_netq); 4042 camisr(&cam_bioq); 4043 4044 /* Release the reference count held while registered. */ 4045 xpt_release_bus(bus_path.bus); 4046 xpt_release_path(&bus_path); 4047 4048 return (CAM_REQ_CMP); 4049 } 4050 4051 static path_id_t 4052 xptnextfreepathid(void) 4053 { 4054 struct cam_eb *bus; 4055 path_id_t pathid; 4056 char *strval; 4057 4058 pathid = 0; 4059 bus = TAILQ_FIRST(&xpt_busses); 4060 retry: 4061 /* Find an unoccupied pathid */ 4062 while (bus != NULL 4063 && bus->path_id <= pathid) { 4064 if (bus->path_id == pathid) 4065 pathid++; 4066 bus = TAILQ_NEXT(bus, links); 4067 } 4068 4069 /* 4070 * Ensure that this pathid is not reserved for 4071 * a bus that may be registered in the future. 4072 */ 4073 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4074 ++pathid; 4075 /* Start the search over */ 4076 goto retry; 4077 } 4078 return (pathid); 4079 } 4080 4081 static path_id_t 4082 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4083 { 4084 path_id_t pathid; 4085 int i, dunit, val; 4086 char buf[32], *strval; 4087 4088 pathid = CAM_XPT_PATH_ID; 4089 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4090 i = -1; 4091 while ((i = resource_locate(i, "scbus")) != -1) { 4092 dunit = resource_query_unit(i); 4093 if (dunit < 0) /* unwired?! */ 4094 continue; 4095 if (resource_string_value("scbus", dunit, "at", &strval) != 0) 4096 continue; 4097 if (strcmp(buf, strval) != 0) 4098 continue; 4099 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4100 if (sim_bus == val) { 4101 pathid = dunit; 4102 break; 4103 } 4104 } else if (sim_bus == 0) { 4105 /* Unspecified matches bus 0 */ 4106 pathid = dunit; 4107 break; 4108 } else { 4109 kprintf("Ambiguous scbus configuration for %s%d " 4110 "bus %d, cannot wire down. The kernel " 4111 "config entry for scbus%d should " 4112 "specify a controller bus.\n" 4113 "Scbus will be assigned dynamically.\n", 4114 sim_name, sim_unit, sim_bus, dunit); 4115 break; 4116 } 4117 } 4118 4119 if (pathid == CAM_XPT_PATH_ID) 4120 pathid = xptnextfreepathid(); 4121 return (pathid); 4122 } 4123 4124 void 4125 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4126 { 4127 struct cam_eb *bus; 4128 struct cam_et *target, *next_target; 4129 struct cam_ed *device, *next_device; 4130 4131 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4132 4133 /* 4134 * Most async events come from a CAM interrupt context. In 4135 * a few cases, the error recovery code at the peripheral layer, 4136 * which may run from our SWI or a process context, may signal 4137 * deferred events with a call to xpt_async. Ensure async 4138 * notifications are serialized by blocking cam interrupts. 4139 */ 4140 crit_enter(); 4141 4142 bus = path->bus; 4143 4144 if (async_code == AC_BUS_RESET) { 4145 /* Update our notion of when the last reset occurred */ 4146 microuptime(&bus->last_reset); 4147 } 4148 4149 for (target = TAILQ_FIRST(&bus->et_entries); 4150 target != NULL; 4151 target = next_target) { 4152 4153 next_target = TAILQ_NEXT(target, links); 4154 4155 if (path->target != target 4156 && path->target->target_id != CAM_TARGET_WILDCARD 4157 && target->target_id != CAM_TARGET_WILDCARD) 4158 continue; 4159 4160 if (async_code == AC_SENT_BDR) { 4161 /* Update our notion of when the last reset occurred */ 4162 microuptime(&path->target->last_reset); 4163 } 4164 4165 for (device = TAILQ_FIRST(&target->ed_entries); 4166 device != NULL; 4167 device = next_device) { 4168 4169 next_device = TAILQ_NEXT(device, links); 4170 4171 if (path->device != device 4172 && path->device->lun_id != CAM_LUN_WILDCARD 4173 && device->lun_id != CAM_LUN_WILDCARD) 4174 continue; 4175 4176 xpt_dev_async(async_code, bus, target, 4177 device, async_arg); 4178 4179 xpt_async_bcast(&device->asyncs, async_code, 4180 path, async_arg); 4181 } 4182 } 4183 4184 /* 4185 * If this wasn't a fully wildcarded async, tell all 4186 * clients that want all async events. 4187 */ 4188 if (bus != xpt_periph->path->bus) 4189 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4190 path, async_arg); 4191 crit_exit(); 4192 } 4193 4194 static void 4195 xpt_async_bcast(struct async_list *async_head, 4196 u_int32_t async_code, 4197 struct cam_path *path, void *async_arg) 4198 { 4199 struct async_node *cur_entry; 4200 4201 cur_entry = SLIST_FIRST(async_head); 4202 while (cur_entry != NULL) { 4203 struct async_node *next_entry; 4204 /* 4205 * Grab the next list entry before we call the current 4206 * entry's callback. This is because the callback function 4207 * can delete its async callback entry. 4208 */ 4209 next_entry = SLIST_NEXT(cur_entry, links); 4210 if ((cur_entry->event_enable & async_code) != 0) 4211 cur_entry->callback(cur_entry->callback_arg, 4212 async_code, path, 4213 async_arg); 4214 cur_entry = next_entry; 4215 } 4216 } 4217 4218 /* 4219 * Handle any per-device event notifications that require action by the XPT. 4220 */ 4221 static void 4222 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4223 struct cam_ed *device, void *async_arg) 4224 { 4225 cam_status status; 4226 struct cam_path newpath; 4227 4228 /* 4229 * We only need to handle events for real devices. 4230 */ 4231 if (target->target_id == CAM_TARGET_WILDCARD 4232 || device->lun_id == CAM_LUN_WILDCARD) 4233 return; 4234 4235 /* 4236 * We need our own path with wildcards expanded to 4237 * handle certain types of events. 4238 */ 4239 if ((async_code == AC_SENT_BDR) 4240 || (async_code == AC_BUS_RESET) 4241 || (async_code == AC_INQ_CHANGED)) 4242 status = xpt_compile_path(&newpath, NULL, 4243 bus->path_id, 4244 target->target_id, 4245 device->lun_id); 4246 else 4247 status = CAM_REQ_CMP_ERR; 4248 4249 if (status == CAM_REQ_CMP) { 4250 4251 /* 4252 * Allow transfer negotiation to occur in a 4253 * tag free environment. 4254 */ 4255 if (async_code == AC_SENT_BDR 4256 || async_code == AC_BUS_RESET) 4257 xpt_toggle_tags(&newpath); 4258 4259 if (async_code == AC_INQ_CHANGED) { 4260 /* 4261 * We've sent a start unit command, or 4262 * something similar to a device that 4263 * may have caused its inquiry data to 4264 * change. So we re-scan the device to 4265 * refresh the inquiry data for it. 4266 */ 4267 xpt_scan_lun(newpath.periph, &newpath, 4268 CAM_EXPECT_INQ_CHANGE, NULL); 4269 } 4270 xpt_release_path(&newpath); 4271 } else if (async_code == AC_LOST_DEVICE) { 4272 /* 4273 * When we lose a device the device may be about to detach 4274 * the sim, we have to clear out all pending timeouts and 4275 * requests before that happens. XXX it would be nice if 4276 * we could abort the requests pertaining to the device. 4277 */ 4278 xpt_release_devq_timeout(device); 4279 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4280 device->flags |= CAM_DEV_UNCONFIGURED; 4281 xpt_release_device(bus, target, device); 4282 } 4283 } else if (async_code == AC_TRANSFER_NEG) { 4284 struct ccb_trans_settings *settings; 4285 4286 settings = (struct ccb_trans_settings *)async_arg; 4287 xpt_set_transfer_settings(settings, device, 4288 /*async_update*/TRUE); 4289 } 4290 } 4291 4292 u_int32_t 4293 xpt_freeze_devq(struct cam_path *path, u_int count) 4294 { 4295 struct ccb_hdr *ccbh; 4296 4297 crit_enter(); 4298 path->device->qfrozen_cnt += count; 4299 4300 /* 4301 * Mark the last CCB in the queue as needing 4302 * to be requeued if the driver hasn't 4303 * changed it's state yet. This fixes a race 4304 * where a ccb is just about to be queued to 4305 * a controller driver when it's interrupt routine 4306 * freezes the queue. To completly close the 4307 * hole, controller drives must check to see 4308 * if a ccb's status is still CAM_REQ_INPROG 4309 * under critical section protection just before they queue 4310 * the CCB. See ahc_action/ahc_freeze_devq for 4311 * an example. 4312 */ 4313 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4314 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4315 ccbh->status = CAM_REQUEUE_REQ; 4316 crit_exit(); 4317 return (path->device->qfrozen_cnt); 4318 } 4319 4320 u_int32_t 4321 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4322 { 4323 if (sim->devq == NULL) 4324 return(count); 4325 sim->devq->send_queue.qfrozen_cnt += count; 4326 if (sim->devq->active_dev != NULL) { 4327 struct ccb_hdr *ccbh; 4328 4329 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4330 ccb_hdr_tailq); 4331 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4332 ccbh->status = CAM_REQUEUE_REQ; 4333 } 4334 return (sim->devq->send_queue.qfrozen_cnt); 4335 } 4336 4337 /* 4338 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4339 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4340 * freed, which is not the case here), but the device queue is also freed XXX 4341 * and we have to check that here. 4342 * 4343 * XXX fixme: could we simply not null-out the device queue via 4344 * cam_sim_free()? 4345 */ 4346 static void 4347 xpt_release_devq_timeout(void *arg) 4348 { 4349 struct cam_ed *device; 4350 4351 device = (struct cam_ed *)arg; 4352 4353 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4354 } 4355 4356 void 4357 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4358 { 4359 xpt_release_devq_device(path->device, count, run_queue); 4360 } 4361 4362 static void 4363 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4364 { 4365 int rundevq; 4366 4367 rundevq = 0; 4368 crit_enter(); 4369 4370 if (dev->qfrozen_cnt > 0) { 4371 4372 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4373 dev->qfrozen_cnt -= count; 4374 if (dev->qfrozen_cnt == 0) { 4375 4376 /* 4377 * No longer need to wait for a successful 4378 * command completion. 4379 */ 4380 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4381 4382 /* 4383 * Remove any timeouts that might be scheduled 4384 * to release this queue. 4385 */ 4386 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4387 callout_stop(&dev->c_handle); 4388 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4389 } 4390 4391 /* 4392 * Now that we are unfrozen schedule the 4393 * device so any pending transactions are 4394 * run. 4395 */ 4396 if ((dev->ccbq.queue.entries > 0) 4397 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4398 && (run_queue != 0)) { 4399 rundevq = 1; 4400 } 4401 } 4402 } 4403 if (rundevq != 0) 4404 xpt_run_dev_sendq(dev->target->bus); 4405 crit_exit(); 4406 } 4407 4408 void 4409 xpt_release_simq(struct cam_sim *sim, int run_queue) 4410 { 4411 struct camq *sendq; 4412 4413 if (sim->devq == NULL) 4414 return; 4415 4416 sendq = &(sim->devq->send_queue); 4417 crit_enter(); 4418 4419 if (sendq->qfrozen_cnt > 0) { 4420 sendq->qfrozen_cnt--; 4421 if (sendq->qfrozen_cnt == 0) { 4422 struct cam_eb *bus; 4423 4424 /* 4425 * If there is a timeout scheduled to release this 4426 * sim queue, remove it. The queue frozen count is 4427 * already at 0. 4428 */ 4429 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4430 callout_stop(&sim->c_handle); 4431 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4432 } 4433 bus = xpt_find_bus(sim->path_id); 4434 crit_exit(); 4435 4436 if (run_queue) { 4437 /* 4438 * Now that we are unfrozen run the send queue. 4439 */ 4440 xpt_run_dev_sendq(bus); 4441 } 4442 xpt_release_bus(bus); 4443 } else { 4444 crit_exit(); 4445 } 4446 } else { 4447 crit_exit(); 4448 } 4449 } 4450 4451 void 4452 xpt_done(union ccb *done_ccb) 4453 { 4454 crit_enter(); 4455 4456 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4457 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4458 /* 4459 * Queue up the request for handling by our SWI handler 4460 * any of the "non-immediate" type of ccbs. 4461 */ 4462 switch (done_ccb->ccb_h.path->periph->type) { 4463 case CAM_PERIPH_BIO: 4464 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4465 sim_links.tqe); 4466 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4467 setsoftcambio(); 4468 break; 4469 case CAM_PERIPH_NET: 4470 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4471 sim_links.tqe); 4472 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4473 setsoftcamnet(); 4474 break; 4475 } 4476 } 4477 crit_exit(); 4478 } 4479 4480 union ccb * 4481 xpt_alloc_ccb(void) 4482 { 4483 union ccb *new_ccb; 4484 4485 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4486 return (new_ccb); 4487 } 4488 4489 void 4490 xpt_free_ccb(union ccb *free_ccb) 4491 { 4492 kfree(free_ccb, M_DEVBUF); 4493 } 4494 4495 4496 4497 /* Private XPT functions */ 4498 4499 /* 4500 * Get a CAM control block for the caller. Charge the structure to the device 4501 * referenced by the path. If the this device has no 'credits' then the 4502 * device already has the maximum number of outstanding operations under way 4503 * and we return NULL. If we don't have sufficient resources to allocate more 4504 * ccbs, we also return NULL. 4505 */ 4506 static union ccb * 4507 xpt_get_ccb(struct cam_ed *device) 4508 { 4509 union ccb *new_ccb; 4510 4511 crit_enter(); 4512 if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) { 4513 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4514 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4515 xpt_links.sle); 4516 xpt_ccb_count++; 4517 } 4518 cam_ccbq_take_opening(&device->ccbq); 4519 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4520 crit_exit(); 4521 return (new_ccb); 4522 } 4523 4524 static void 4525 xpt_release_bus(struct cam_eb *bus) 4526 { 4527 4528 crit_enter(); 4529 if (bus->refcount == 1) { 4530 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL); 4531 TAILQ_REMOVE(&xpt_busses, bus, links); 4532 if (bus->sim) { 4533 cam_sim_release(bus->sim, 0); 4534 bus->sim = NULL; 4535 } 4536 bus_generation++; 4537 KKASSERT(bus->refcount == 1); 4538 kfree(bus, M_DEVBUF); 4539 } else { 4540 --bus->refcount; 4541 } 4542 crit_exit(); 4543 } 4544 4545 static struct cam_et * 4546 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4547 { 4548 struct cam_et *target; 4549 struct cam_et *cur_target; 4550 4551 target = kmalloc(sizeof(*target), M_DEVBUF, M_INTWAIT); 4552 4553 TAILQ_INIT(&target->ed_entries); 4554 target->bus = bus; 4555 target->target_id = target_id; 4556 target->refcount = 1; 4557 target->generation = 0; 4558 timevalclear(&target->last_reset); 4559 /* 4560 * Hold a reference to our parent bus so it 4561 * will not go away before we do. 4562 */ 4563 bus->refcount++; 4564 4565 /* Insertion sort into our bus's target list */ 4566 cur_target = TAILQ_FIRST(&bus->et_entries); 4567 while (cur_target != NULL && cur_target->target_id < target_id) 4568 cur_target = TAILQ_NEXT(cur_target, links); 4569 4570 if (cur_target != NULL) { 4571 TAILQ_INSERT_BEFORE(cur_target, target, links); 4572 } else { 4573 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4574 } 4575 bus->generation++; 4576 return (target); 4577 } 4578 4579 static void 4580 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4581 { 4582 crit_enter(); 4583 if (target->refcount == 1) { 4584 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 4585 TAILQ_REMOVE(&bus->et_entries, target, links); 4586 bus->generation++; 4587 xpt_release_bus(bus); 4588 KKASSERT(target->refcount == 1); 4589 kfree(target, M_DEVBUF); 4590 } else { 4591 --target->refcount; 4592 } 4593 crit_exit(); 4594 } 4595 4596 static struct cam_ed * 4597 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4598 { 4599 struct cam_ed *device; 4600 struct cam_devq *devq; 4601 cam_status status; 4602 4603 /* Make space for us in the device queue on our bus */ 4604 if (bus->sim->devq == NULL) 4605 return(NULL); 4606 devq = bus->sim->devq; 4607 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4608 4609 if (status != CAM_REQ_CMP) { 4610 device = NULL; 4611 } else { 4612 device = kmalloc(sizeof(*device), M_DEVBUF, M_INTWAIT); 4613 } 4614 4615 if (device != NULL) { 4616 struct cam_ed *cur_device; 4617 4618 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4619 device->alloc_ccb_entry.device = device; 4620 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4621 device->send_ccb_entry.device = device; 4622 device->target = target; 4623 device->lun_id = lun_id; 4624 /* Initialize our queues */ 4625 if (camq_init(&device->drvq, 0) != 0) { 4626 kfree(device, M_DEVBUF); 4627 return (NULL); 4628 } 4629 if (cam_ccbq_init(&device->ccbq, 4630 bus->sim->max_dev_openings) != 0) { 4631 camq_fini(&device->drvq); 4632 kfree(device, M_DEVBUF); 4633 return (NULL); 4634 } 4635 SLIST_INIT(&device->asyncs); 4636 SLIST_INIT(&device->periphs); 4637 device->generation = 0; 4638 device->owner = NULL; 4639 /* 4640 * Take the default quirk entry until we have inquiry 4641 * data and can determine a better quirk to use. 4642 */ 4643 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4644 bzero(&device->inq_data, sizeof(device->inq_data)); 4645 device->inq_flags = 0; 4646 device->queue_flags = 0; 4647 device->serial_num = NULL; 4648 device->serial_num_len = 0; 4649 device->qfrozen_cnt = 0; 4650 device->flags = CAM_DEV_UNCONFIGURED; 4651 device->tag_delay_count = 0; 4652 device->refcount = 1; 4653 callout_init(&device->c_handle); 4654 4655 /* 4656 * Hold a reference to our parent target so it 4657 * will not go away before we do. 4658 */ 4659 target->refcount++; 4660 4661 /* 4662 * XXX should be limited by number of CCBs this bus can 4663 * do. 4664 */ 4665 xpt_max_ccbs += device->ccbq.devq_openings; 4666 /* Insertion sort into our target's device list */ 4667 cur_device = TAILQ_FIRST(&target->ed_entries); 4668 while (cur_device != NULL && cur_device->lun_id < lun_id) 4669 cur_device = TAILQ_NEXT(cur_device, links); 4670 if (cur_device != NULL) { 4671 TAILQ_INSERT_BEFORE(cur_device, device, links); 4672 } else { 4673 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4674 } 4675 target->generation++; 4676 } 4677 return (device); 4678 } 4679 4680 static void 4681 xpt_reference_device(struct cam_ed *device) 4682 { 4683 ++device->refcount; 4684 } 4685 4686 static void 4687 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4688 struct cam_ed *device) 4689 { 4690 struct cam_devq *devq; 4691 4692 crit_enter(); 4693 if (device->refcount == 1) { 4694 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 4695 4696 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4697 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4698 panic("Removing device while still queued for ccbs"); 4699 4700 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4701 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4702 callout_stop(&device->c_handle); 4703 } 4704 4705 TAILQ_REMOVE(&target->ed_entries, device,links); 4706 target->generation++; 4707 xpt_max_ccbs -= device->ccbq.devq_openings; 4708 /* Release our slot in the devq */ 4709 devq = bus->sim->devq; 4710 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4711 xpt_release_target(bus, target); 4712 KKASSERT(device->refcount == 1); 4713 kfree(device, M_DEVBUF); 4714 } else { 4715 --device->refcount; 4716 } 4717 crit_exit(); 4718 } 4719 4720 static u_int32_t 4721 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4722 { 4723 int diff; 4724 int result; 4725 struct cam_ed *dev; 4726 4727 dev = path->device; 4728 4729 crit_enter(); 4730 4731 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4732 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4733 if (result == CAM_REQ_CMP && (diff < 0)) { 4734 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4735 } 4736 /* Adjust the global limit */ 4737 xpt_max_ccbs += diff; 4738 crit_exit(); 4739 return (result); 4740 } 4741 4742 static struct cam_eb * 4743 xpt_find_bus(path_id_t path_id) 4744 { 4745 struct cam_eb *bus; 4746 4747 for (bus = TAILQ_FIRST(&xpt_busses); 4748 bus != NULL; 4749 bus = TAILQ_NEXT(bus, links)) { 4750 if (bus->path_id == path_id) { 4751 bus->refcount++; 4752 break; 4753 } 4754 } 4755 return (bus); 4756 } 4757 4758 static struct cam_et * 4759 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4760 { 4761 struct cam_et *target; 4762 4763 for (target = TAILQ_FIRST(&bus->et_entries); 4764 target != NULL; 4765 target = TAILQ_NEXT(target, links)) { 4766 if (target->target_id == target_id) { 4767 target->refcount++; 4768 break; 4769 } 4770 } 4771 return (target); 4772 } 4773 4774 static struct cam_ed * 4775 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4776 { 4777 struct cam_ed *device; 4778 4779 for (device = TAILQ_FIRST(&target->ed_entries); 4780 device != NULL; 4781 device = TAILQ_NEXT(device, links)) { 4782 if (device->lun_id == lun_id) { 4783 device->refcount++; 4784 break; 4785 } 4786 } 4787 return (device); 4788 } 4789 4790 typedef struct { 4791 union ccb *request_ccb; 4792 struct ccb_pathinq *cpi; 4793 int pending_count; 4794 } xpt_scan_bus_info; 4795 4796 /* 4797 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4798 * As the scan progresses, xpt_scan_bus is used as the 4799 * callback on completion function. 4800 */ 4801 static void 4802 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 4803 { 4804 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 4805 ("xpt_scan_bus\n")); 4806 switch (request_ccb->ccb_h.func_code) { 4807 case XPT_SCAN_BUS: 4808 { 4809 xpt_scan_bus_info *scan_info; 4810 union ccb *work_ccb; 4811 struct cam_path *path; 4812 u_int i; 4813 u_int max_target; 4814 u_int initiator_id; 4815 4816 /* Find out the characteristics of the bus */ 4817 work_ccb = xpt_alloc_ccb(); 4818 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 4819 request_ccb->ccb_h.pinfo.priority); 4820 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 4821 xpt_action(work_ccb); 4822 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 4823 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 4824 xpt_free_ccb(work_ccb); 4825 xpt_done(request_ccb); 4826 return; 4827 } 4828 4829 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 4830 /* 4831 * Can't scan the bus on an adapter that 4832 * cannot perform the initiator role. 4833 */ 4834 request_ccb->ccb_h.status = CAM_REQ_CMP; 4835 xpt_free_ccb(work_ccb); 4836 xpt_done(request_ccb); 4837 return; 4838 } 4839 4840 /* Save some state for use while we probe for devices */ 4841 scan_info = (xpt_scan_bus_info *) 4842 kmalloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT); 4843 scan_info->request_ccb = request_ccb; 4844 scan_info->cpi = &work_ccb->cpi; 4845 4846 /* Cache on our stack so we can work asynchronously */ 4847 max_target = scan_info->cpi->max_target; 4848 initiator_id = scan_info->cpi->initiator_id; 4849 4850 /* 4851 * Don't count the initiator if the 4852 * initiator is addressable. 4853 */ 4854 scan_info->pending_count = max_target + 1; 4855 if (initiator_id <= max_target) 4856 scan_info->pending_count--; 4857 4858 for (i = 0; i <= max_target; i++) { 4859 cam_status status; 4860 if (i == initiator_id) 4861 continue; 4862 4863 status = xpt_create_path(&path, xpt_periph, 4864 request_ccb->ccb_h.path_id, 4865 i, 0); 4866 if (status != CAM_REQ_CMP) { 4867 kprintf("xpt_scan_bus: xpt_create_path failed" 4868 " with status %#x, bus scan halted\n", 4869 status); 4870 break; 4871 } 4872 work_ccb = xpt_alloc_ccb(); 4873 xpt_setup_ccb(&work_ccb->ccb_h, path, 4874 request_ccb->ccb_h.pinfo.priority); 4875 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4876 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4877 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 4878 work_ccb->crcn.flags = request_ccb->crcn.flags; 4879 #if 0 4880 kprintf("xpt_scan_bus: probing %d:%d:%d\n", 4881 request_ccb->ccb_h.path_id, i, 0); 4882 #endif 4883 xpt_action(work_ccb); 4884 } 4885 break; 4886 } 4887 case XPT_SCAN_LUN: 4888 { 4889 xpt_scan_bus_info *scan_info; 4890 path_id_t path_id; 4891 target_id_t target_id; 4892 lun_id_t lun_id; 4893 4894 /* Reuse the same CCB to query if a device was really found */ 4895 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 4896 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 4897 request_ccb->ccb_h.pinfo.priority); 4898 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 4899 4900 path_id = request_ccb->ccb_h.path_id; 4901 target_id = request_ccb->ccb_h.target_id; 4902 lun_id = request_ccb->ccb_h.target_lun; 4903 xpt_action(request_ccb); 4904 4905 #if 0 4906 kprintf("xpt_scan_bus: got back probe from %d:%d:%d\n", 4907 path_id, target_id, lun_id); 4908 #endif 4909 4910 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 4911 struct cam_ed *device; 4912 struct cam_et *target; 4913 int phl; 4914 4915 /* 4916 * If we already probed lun 0 successfully, or 4917 * we have additional configured luns on this 4918 * target that might have "gone away", go onto 4919 * the next lun. 4920 */ 4921 target = request_ccb->ccb_h.path->target; 4922 /* 4923 * We may touch devices that we don't 4924 * hold references too, so ensure they 4925 * don't disappear out from under us. 4926 * The target above is referenced by the 4927 * path in the request ccb. 4928 */ 4929 phl = 0; 4930 crit_enter(); 4931 device = TAILQ_FIRST(&target->ed_entries); 4932 if (device != NULL) { 4933 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 4934 if (device->lun_id == 0) 4935 device = TAILQ_NEXT(device, links); 4936 } 4937 crit_exit(); 4938 if ((lun_id != 0) || (device != NULL)) { 4939 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 4940 lun_id++; 4941 } 4942 } else { 4943 struct cam_ed *device; 4944 4945 device = request_ccb->ccb_h.path->device; 4946 4947 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 4948 /* Try the next lun */ 4949 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 4950 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 4951 lun_id++; 4952 } 4953 } 4954 4955 xpt_free_path(request_ccb->ccb_h.path); 4956 4957 /* Check Bounds */ 4958 if ((lun_id == request_ccb->ccb_h.target_lun) 4959 || lun_id > scan_info->cpi->max_lun) { 4960 /* We're done */ 4961 4962 xpt_free_ccb(request_ccb); 4963 scan_info->pending_count--; 4964 if (scan_info->pending_count == 0) { 4965 xpt_free_ccb((union ccb *)scan_info->cpi); 4966 request_ccb = scan_info->request_ccb; 4967 kfree(scan_info, M_TEMP); 4968 request_ccb->ccb_h.status = CAM_REQ_CMP; 4969 xpt_done(request_ccb); 4970 } 4971 } else { 4972 /* Try the next device */ 4973 struct cam_path *path; 4974 cam_status status; 4975 4976 path = request_ccb->ccb_h.path; 4977 status = xpt_create_path(&path, xpt_periph, 4978 path_id, target_id, lun_id); 4979 if (status != CAM_REQ_CMP) { 4980 kprintf("xpt_scan_bus: xpt_create_path failed " 4981 "with status %#x, halting LUN scan\n", 4982 status); 4983 xpt_free_ccb(request_ccb); 4984 scan_info->pending_count--; 4985 if (scan_info->pending_count == 0) { 4986 xpt_free_ccb( 4987 (union ccb *)scan_info->cpi); 4988 request_ccb = scan_info->request_ccb; 4989 kfree(scan_info, M_TEMP); 4990 request_ccb->ccb_h.status = CAM_REQ_CMP; 4991 xpt_done(request_ccb); 4992 break; 4993 } 4994 } 4995 xpt_setup_ccb(&request_ccb->ccb_h, path, 4996 request_ccb->ccb_h.pinfo.priority); 4997 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 4998 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 4999 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5000 request_ccb->crcn.flags = 5001 scan_info->request_ccb->crcn.flags; 5002 #if 0 5003 xpt_print_path(path); 5004 kprintf("xpt_scan bus probing\n"); 5005 #endif 5006 xpt_action(request_ccb); 5007 } 5008 break; 5009 } 5010 default: 5011 break; 5012 } 5013 } 5014 5015 typedef enum { 5016 PROBE_TUR, 5017 PROBE_INQUIRY, 5018 PROBE_FULL_INQUIRY, 5019 PROBE_MODE_SENSE, 5020 PROBE_SERIAL_NUM, 5021 PROBE_TUR_FOR_NEGOTIATION 5022 } probe_action; 5023 5024 typedef enum { 5025 PROBE_INQUIRY_CKSUM = 0x01, 5026 PROBE_SERIAL_CKSUM = 0x02, 5027 PROBE_NO_ANNOUNCE = 0x04 5028 } probe_flags; 5029 5030 typedef struct { 5031 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5032 probe_action action; 5033 union ccb saved_ccb; 5034 probe_flags flags; 5035 MD5_CTX context; 5036 u_int8_t digest[16]; 5037 } probe_softc; 5038 5039 static void 5040 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5041 cam_flags flags, union ccb *request_ccb) 5042 { 5043 struct ccb_pathinq cpi; 5044 cam_status status; 5045 struct cam_path *new_path; 5046 struct cam_periph *old_periph; 5047 5048 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5049 ("xpt_scan_lun\n")); 5050 5051 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5052 cpi.ccb_h.func_code = XPT_PATH_INQ; 5053 xpt_action((union ccb *)&cpi); 5054 5055 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5056 if (request_ccb != NULL) { 5057 request_ccb->ccb_h.status = cpi.ccb_h.status; 5058 xpt_done(request_ccb); 5059 } 5060 return; 5061 } 5062 5063 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5064 /* 5065 * Can't scan the bus on an adapter that 5066 * cannot perform the initiator role. 5067 */ 5068 if (request_ccb != NULL) { 5069 request_ccb->ccb_h.status = CAM_REQ_CMP; 5070 xpt_done(request_ccb); 5071 } 5072 return; 5073 } 5074 5075 if (request_ccb == NULL) { 5076 request_ccb = kmalloc(sizeof(union ccb), M_TEMP, M_INTWAIT); 5077 new_path = kmalloc(sizeof(*new_path), M_TEMP, M_INTWAIT); 5078 status = xpt_compile_path(new_path, xpt_periph, 5079 path->bus->path_id, 5080 path->target->target_id, 5081 path->device->lun_id); 5082 5083 if (status != CAM_REQ_CMP) { 5084 xpt_print_path(path); 5085 kprintf("xpt_scan_lun: can't compile path, can't " 5086 "continue\n"); 5087 kfree(request_ccb, M_TEMP); 5088 kfree(new_path, M_TEMP); 5089 return; 5090 } 5091 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5092 request_ccb->ccb_h.cbfcnp = xptscandone; 5093 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5094 request_ccb->crcn.flags = flags; 5095 } 5096 5097 crit_enter(); 5098 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5099 probe_softc *softc; 5100 5101 softc = (probe_softc *)old_periph->softc; 5102 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5103 periph_links.tqe); 5104 } else { 5105 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5106 probestart, "probe", 5107 CAM_PERIPH_BIO, 5108 request_ccb->ccb_h.path, NULL, 0, 5109 request_ccb); 5110 5111 if (status != CAM_REQ_CMP) { 5112 xpt_print_path(path); 5113 kprintf("xpt_scan_lun: cam_alloc_periph returned an " 5114 "error, can't continue probe\n"); 5115 request_ccb->ccb_h.status = status; 5116 xpt_done(request_ccb); 5117 } 5118 } 5119 crit_exit(); 5120 } 5121 5122 static void 5123 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5124 { 5125 xpt_release_path(done_ccb->ccb_h.path); 5126 kfree(done_ccb->ccb_h.path, M_TEMP); 5127 kfree(done_ccb, M_TEMP); 5128 } 5129 5130 static cam_status 5131 proberegister(struct cam_periph *periph, void *arg) 5132 { 5133 union ccb *request_ccb; /* CCB representing the probe request */ 5134 probe_softc *softc; 5135 5136 request_ccb = (union ccb *)arg; 5137 if (periph == NULL) { 5138 kprintf("proberegister: periph was NULL!!\n"); 5139 return(CAM_REQ_CMP_ERR); 5140 } 5141 5142 if (request_ccb == NULL) { 5143 kprintf("proberegister: no probe CCB, " 5144 "can't register device\n"); 5145 return(CAM_REQ_CMP_ERR); 5146 } 5147 5148 softc = kmalloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO); 5149 TAILQ_INIT(&softc->request_ccbs); 5150 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5151 periph_links.tqe); 5152 softc->flags = 0; 5153 periph->softc = softc; 5154 cam_periph_acquire(periph); 5155 /* 5156 * Ensure we've waited at least a bus settle 5157 * delay before attempting to probe the device. 5158 * For HBAs that don't do bus resets, this won't make a difference. 5159 */ 5160 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5161 SCSI_DELAY); 5162 probeschedule(periph); 5163 return(CAM_REQ_CMP); 5164 } 5165 5166 static void 5167 probeschedule(struct cam_periph *periph) 5168 { 5169 struct ccb_pathinq cpi; 5170 union ccb *ccb; 5171 probe_softc *softc; 5172 5173 softc = (probe_softc *)periph->softc; 5174 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5175 5176 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5177 cpi.ccb_h.func_code = XPT_PATH_INQ; 5178 xpt_action((union ccb *)&cpi); 5179 5180 /* 5181 * If a device has gone away and another device, or the same one, 5182 * is back in the same place, it should have a unit attention 5183 * condition pending. It will not report the unit attention in 5184 * response to an inquiry, which may leave invalid transfer 5185 * negotiations in effect. The TUR will reveal the unit attention 5186 * condition. Only send the TUR for lun 0, since some devices 5187 * will get confused by commands other than inquiry to non-existent 5188 * luns. If you think a device has gone away start your scan from 5189 * lun 0. This will insure that any bogus transfer settings are 5190 * invalidated. 5191 * 5192 * If we haven't seen the device before and the controller supports 5193 * some kind of transfer negotiation, negotiate with the first 5194 * sent command if no bus reset was performed at startup. This 5195 * ensures that the device is not confused by transfer negotiation 5196 * settings left over by loader or BIOS action. 5197 */ 5198 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5199 && (ccb->ccb_h.target_lun == 0)) { 5200 softc->action = PROBE_TUR; 5201 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5202 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5203 proberequestdefaultnegotiation(periph); 5204 softc->action = PROBE_INQUIRY; 5205 } else { 5206 softc->action = PROBE_INQUIRY; 5207 } 5208 5209 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5210 softc->flags |= PROBE_NO_ANNOUNCE; 5211 else 5212 softc->flags &= ~PROBE_NO_ANNOUNCE; 5213 5214 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5215 } 5216 5217 static void 5218 probestart(struct cam_periph *periph, union ccb *start_ccb) 5219 { 5220 /* Probe the device that our peripheral driver points to */ 5221 struct ccb_scsiio *csio; 5222 probe_softc *softc; 5223 5224 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5225 5226 softc = (probe_softc *)periph->softc; 5227 csio = &start_ccb->csio; 5228 5229 switch (softc->action) { 5230 case PROBE_TUR: 5231 case PROBE_TUR_FOR_NEGOTIATION: 5232 { 5233 scsi_test_unit_ready(csio, 5234 /*retries*/4, 5235 probedone, 5236 MSG_SIMPLE_Q_TAG, 5237 SSD_FULL_SIZE, 5238 /*timeout*/60000); 5239 break; 5240 } 5241 case PROBE_INQUIRY: 5242 case PROBE_FULL_INQUIRY: 5243 { 5244 u_int inquiry_len; 5245 struct scsi_inquiry_data *inq_buf; 5246 5247 inq_buf = &periph->path->device->inq_data; 5248 /* 5249 * If the device is currently configured, we calculate an 5250 * MD5 checksum of the inquiry data, and if the serial number 5251 * length is greater than 0, add the serial number data 5252 * into the checksum as well. Once the inquiry and the 5253 * serial number check finish, we attempt to figure out 5254 * whether we still have the same device. 5255 */ 5256 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5257 5258 MD5Init(&softc->context); 5259 MD5Update(&softc->context, (unsigned char *)inq_buf, 5260 sizeof(struct scsi_inquiry_data)); 5261 softc->flags |= PROBE_INQUIRY_CKSUM; 5262 if (periph->path->device->serial_num_len > 0) { 5263 MD5Update(&softc->context, 5264 periph->path->device->serial_num, 5265 periph->path->device->serial_num_len); 5266 softc->flags |= PROBE_SERIAL_CKSUM; 5267 } 5268 MD5Final(softc->digest, &softc->context); 5269 } 5270 5271 if (softc->action == PROBE_INQUIRY) 5272 inquiry_len = SHORT_INQUIRY_LENGTH; 5273 else 5274 inquiry_len = inq_buf->additional_length + 5; 5275 5276 scsi_inquiry(csio, 5277 /*retries*/4, 5278 probedone, 5279 MSG_SIMPLE_Q_TAG, 5280 (u_int8_t *)inq_buf, 5281 inquiry_len, 5282 /*evpd*/FALSE, 5283 /*page_code*/0, 5284 SSD_MIN_SIZE, 5285 /*timeout*/60 * 1000); 5286 break; 5287 } 5288 case PROBE_MODE_SENSE: 5289 { 5290 void *mode_buf; 5291 int mode_buf_len; 5292 5293 mode_buf_len = sizeof(struct scsi_mode_header_6) 5294 + sizeof(struct scsi_mode_blk_desc) 5295 + sizeof(struct scsi_control_page); 5296 mode_buf = kmalloc(mode_buf_len, M_TEMP, M_INTWAIT); 5297 scsi_mode_sense(csio, 5298 /*retries*/4, 5299 probedone, 5300 MSG_SIMPLE_Q_TAG, 5301 /*dbd*/FALSE, 5302 SMS_PAGE_CTRL_CURRENT, 5303 SMS_CONTROL_MODE_PAGE, 5304 mode_buf, 5305 mode_buf_len, 5306 SSD_FULL_SIZE, 5307 /*timeout*/60000); 5308 break; 5309 } 5310 case PROBE_SERIAL_NUM: 5311 { 5312 struct scsi_vpd_unit_serial_number *serial_buf; 5313 struct cam_ed* device; 5314 5315 serial_buf = NULL; 5316 device = periph->path->device; 5317 device->serial_num = NULL; 5318 device->serial_num_len = 0; 5319 5320 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5321 serial_buf = kmalloc(sizeof(*serial_buf), M_TEMP, 5322 M_INTWAIT | M_ZERO); 5323 scsi_inquiry(csio, 5324 /*retries*/4, 5325 probedone, 5326 MSG_SIMPLE_Q_TAG, 5327 (u_int8_t *)serial_buf, 5328 sizeof(*serial_buf), 5329 /*evpd*/TRUE, 5330 SVPD_UNIT_SERIAL_NUMBER, 5331 SSD_MIN_SIZE, 5332 /*timeout*/60 * 1000); 5333 break; 5334 } 5335 /* 5336 * We'll have to do without, let our probedone 5337 * routine finish up for us. 5338 */ 5339 start_ccb->csio.data_ptr = NULL; 5340 probedone(periph, start_ccb); 5341 return; 5342 } 5343 } 5344 xpt_action(start_ccb); 5345 } 5346 5347 static void 5348 proberequestdefaultnegotiation(struct cam_periph *periph) 5349 { 5350 struct ccb_trans_settings cts; 5351 5352 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5353 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5354 cts.flags = CCB_TRANS_USER_SETTINGS; 5355 xpt_action((union ccb *)&cts); 5356 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5357 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5358 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5359 xpt_action((union ccb *)&cts); 5360 } 5361 5362 static void 5363 probedone(struct cam_periph *periph, union ccb *done_ccb) 5364 { 5365 probe_softc *softc; 5366 struct cam_path *path; 5367 u_int32_t priority; 5368 5369 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5370 5371 softc = (probe_softc *)periph->softc; 5372 path = done_ccb->ccb_h.path; 5373 priority = done_ccb->ccb_h.pinfo.priority; 5374 5375 switch (softc->action) { 5376 case PROBE_TUR: 5377 { 5378 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5379 5380 if (cam_periph_error(done_ccb, 0, 5381 SF_NO_PRINT, NULL) == ERESTART) 5382 return; 5383 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5384 /* Don't wedge the queue */ 5385 xpt_release_devq(done_ccb->ccb_h.path, 5386 /*count*/1, 5387 /*run_queue*/TRUE); 5388 } 5389 softc->action = PROBE_INQUIRY; 5390 xpt_release_ccb(done_ccb); 5391 xpt_schedule(periph, priority); 5392 return; 5393 } 5394 case PROBE_INQUIRY: 5395 case PROBE_FULL_INQUIRY: 5396 { 5397 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5398 struct scsi_inquiry_data *inq_buf; 5399 u_int8_t periph_qual; 5400 5401 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5402 inq_buf = &path->device->inq_data; 5403 5404 periph_qual = SID_QUAL(inq_buf); 5405 5406 switch(periph_qual) { 5407 case SID_QUAL_LU_CONNECTED: 5408 { 5409 u_int8_t alen; 5410 5411 /* 5412 * We conservatively request only 5413 * SHORT_INQUIRY_LEN bytes of inquiry 5414 * information during our first try 5415 * at sending an INQUIRY. If the device 5416 * has more information to give, 5417 * perform a second request specifying 5418 * the amount of information the device 5419 * is willing to give. 5420 */ 5421 alen = inq_buf->additional_length; 5422 if (softc->action == PROBE_INQUIRY 5423 && alen > (SHORT_INQUIRY_LENGTH - 5)) { 5424 softc->action = PROBE_FULL_INQUIRY; 5425 xpt_release_ccb(done_ccb); 5426 xpt_schedule(periph, priority); 5427 return; 5428 } 5429 5430 xpt_find_quirk(path->device); 5431 5432 if ((inq_buf->flags & SID_CmdQue) != 0) 5433 softc->action = PROBE_MODE_SENSE; 5434 else 5435 softc->action = PROBE_SERIAL_NUM; 5436 5437 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5438 xpt_reference_device(path->device); 5439 5440 xpt_release_ccb(done_ccb); 5441 xpt_schedule(periph, priority); 5442 return; 5443 } 5444 default: 5445 break; 5446 } 5447 } else if (cam_periph_error(done_ccb, 0, 5448 done_ccb->ccb_h.target_lun > 0 5449 ? SF_RETRY_UA|SF_QUIET_IR 5450 : SF_RETRY_UA, 5451 &softc->saved_ccb) == ERESTART) { 5452 return; 5453 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5454 /* Don't wedge the queue */ 5455 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5456 /*run_queue*/TRUE); 5457 } 5458 /* 5459 * If we get to this point, we got an error status back 5460 * from the inquiry and the error status doesn't require 5461 * automatically retrying the command. Therefore, the 5462 * inquiry failed. If we had inquiry information before 5463 * for this device, but this latest inquiry command failed, 5464 * the device has probably gone away. If this device isn't 5465 * already marked unconfigured, notify the peripheral 5466 * drivers that this device is no more. 5467 */ 5468 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5469 /* Send the async notification. */ 5470 xpt_async(AC_LOST_DEVICE, path, NULL); 5471 } 5472 5473 xpt_release_ccb(done_ccb); 5474 break; 5475 } 5476 case PROBE_MODE_SENSE: 5477 { 5478 struct ccb_scsiio *csio; 5479 struct scsi_mode_header_6 *mode_hdr; 5480 5481 csio = &done_ccb->csio; 5482 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5483 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5484 struct scsi_control_page *page; 5485 u_int8_t *offset; 5486 5487 offset = ((u_int8_t *)&mode_hdr[1]) 5488 + mode_hdr->blk_desc_len; 5489 page = (struct scsi_control_page *)offset; 5490 path->device->queue_flags = page->queue_flags; 5491 } else if (cam_periph_error(done_ccb, 0, 5492 SF_RETRY_UA|SF_NO_PRINT, 5493 &softc->saved_ccb) == ERESTART) { 5494 return; 5495 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5496 /* Don't wedge the queue */ 5497 xpt_release_devq(done_ccb->ccb_h.path, 5498 /*count*/1, /*run_queue*/TRUE); 5499 } 5500 xpt_release_ccb(done_ccb); 5501 kfree(mode_hdr, M_TEMP); 5502 softc->action = PROBE_SERIAL_NUM; 5503 xpt_schedule(periph, priority); 5504 return; 5505 } 5506 case PROBE_SERIAL_NUM: 5507 { 5508 struct ccb_scsiio *csio; 5509 struct scsi_vpd_unit_serial_number *serial_buf; 5510 u_int32_t priority; 5511 int changed; 5512 int have_serialnum; 5513 5514 changed = 1; 5515 have_serialnum = 0; 5516 csio = &done_ccb->csio; 5517 priority = done_ccb->ccb_h.pinfo.priority; 5518 serial_buf = 5519 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5520 5521 /* Clean up from previous instance of this device */ 5522 if (path->device->serial_num != NULL) { 5523 kfree(path->device->serial_num, M_DEVBUF); 5524 path->device->serial_num = NULL; 5525 path->device->serial_num_len = 0; 5526 } 5527 5528 if (serial_buf == NULL) { 5529 /* 5530 * Don't process the command as it was never sent 5531 */ 5532 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5533 && (serial_buf->length > 0)) { 5534 5535 have_serialnum = 1; 5536 path->device->serial_num = 5537 kmalloc((serial_buf->length + 1), 5538 M_DEVBUF, M_INTWAIT); 5539 bcopy(serial_buf->serial_num, 5540 path->device->serial_num, 5541 serial_buf->length); 5542 path->device->serial_num_len = serial_buf->length; 5543 path->device->serial_num[serial_buf->length] = '\0'; 5544 } else if (cam_periph_error(done_ccb, 0, 5545 SF_RETRY_UA|SF_NO_PRINT, 5546 &softc->saved_ccb) == ERESTART) { 5547 return; 5548 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5549 /* Don't wedge the queue */ 5550 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5551 /*run_queue*/TRUE); 5552 } 5553 5554 /* 5555 * Let's see if we have seen this device before. 5556 */ 5557 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5558 MD5_CTX context; 5559 u_int8_t digest[16]; 5560 5561 MD5Init(&context); 5562 5563 MD5Update(&context, 5564 (unsigned char *)&path->device->inq_data, 5565 sizeof(struct scsi_inquiry_data)); 5566 5567 if (have_serialnum) 5568 MD5Update(&context, serial_buf->serial_num, 5569 serial_buf->length); 5570 5571 MD5Final(digest, &context); 5572 if (bcmp(softc->digest, digest, 16) == 0) 5573 changed = 0; 5574 5575 /* 5576 * XXX Do we need to do a TUR in order to ensure 5577 * that the device really hasn't changed??? 5578 */ 5579 if ((changed != 0) 5580 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5581 xpt_async(AC_LOST_DEVICE, path, NULL); 5582 } 5583 if (serial_buf != NULL) 5584 kfree(serial_buf, M_TEMP); 5585 5586 if (changed != 0) { 5587 /* 5588 * Now that we have all the necessary 5589 * information to safely perform transfer 5590 * negotiations... Controllers don't perform 5591 * any negotiation or tagged queuing until 5592 * after the first XPT_SET_TRAN_SETTINGS ccb is 5593 * received. So, on a new device, just retreive 5594 * the user settings, and set them as the current 5595 * settings to set the device up. 5596 */ 5597 proberequestdefaultnegotiation(periph); 5598 xpt_release_ccb(done_ccb); 5599 5600 /* 5601 * Perform a TUR to allow the controller to 5602 * perform any necessary transfer negotiation. 5603 */ 5604 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5605 xpt_schedule(periph, priority); 5606 return; 5607 } 5608 xpt_release_ccb(done_ccb); 5609 break; 5610 } 5611 case PROBE_TUR_FOR_NEGOTIATION: 5612 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5613 /* Don't wedge the queue */ 5614 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5615 /*run_queue*/TRUE); 5616 } 5617 5618 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5619 xpt_reference_device(path->device); 5620 5621 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5622 /* Inform the XPT that a new device has been found */ 5623 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5624 xpt_action(done_ccb); 5625 5626 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5627 } 5628 xpt_release_ccb(done_ccb); 5629 break; 5630 } 5631 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5632 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5633 done_ccb->ccb_h.status = CAM_REQ_CMP; 5634 xpt_done(done_ccb); 5635 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5636 cam_periph_invalidate(periph); 5637 cam_periph_release(periph); 5638 } else { 5639 probeschedule(periph); 5640 } 5641 } 5642 5643 static void 5644 probecleanup(struct cam_periph *periph) 5645 { 5646 kfree(periph->softc, M_TEMP); 5647 } 5648 5649 static void 5650 xpt_find_quirk(struct cam_ed *device) 5651 { 5652 caddr_t match; 5653 5654 match = cam_quirkmatch((caddr_t)&device->inq_data, 5655 (caddr_t)xpt_quirk_table, 5656 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5657 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5658 5659 if (match == NULL) 5660 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5661 5662 device->quirk = (struct xpt_quirk_entry *)match; 5663 } 5664 5665 static void 5666 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5667 int async_update) 5668 { 5669 struct cam_sim *sim; 5670 int qfrozen; 5671 5672 sim = cts->ccb_h.path->bus->sim; 5673 if (async_update == FALSE) { 5674 struct scsi_inquiry_data *inq_data; 5675 struct ccb_pathinq cpi; 5676 struct ccb_trans_settings cur_cts; 5677 5678 if (device == NULL) { 5679 cts->ccb_h.status = CAM_PATH_INVALID; 5680 xpt_done((union ccb *)cts); 5681 return; 5682 } 5683 5684 /* 5685 * Perform sanity checking against what the 5686 * controller and device can do. 5687 */ 5688 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 5689 cpi.ccb_h.func_code = XPT_PATH_INQ; 5690 xpt_action((union ccb *)&cpi); 5691 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 5692 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5693 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 5694 xpt_action((union ccb *)&cur_cts); 5695 inq_data = &device->inq_data; 5696 5697 /* Fill in any gaps in what the user gave us */ 5698 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 5699 cts->sync_period = cur_cts.sync_period; 5700 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 5701 cts->sync_offset = cur_cts.sync_offset; 5702 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 5703 cts->bus_width = cur_cts.bus_width; 5704 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 5705 cts->flags &= ~CCB_TRANS_DISC_ENB; 5706 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 5707 } 5708 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 5709 cts->flags &= ~CCB_TRANS_TAG_ENB; 5710 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 5711 } 5712 5713 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 5714 && (inq_data->flags & SID_Sync) == 0) 5715 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 5716 || (cts->sync_offset == 0) 5717 || (cts->sync_period == 0)) { 5718 /* Force async */ 5719 cts->sync_period = 0; 5720 cts->sync_offset = 0; 5721 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) { 5722 5723 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 5724 && cts->sync_period <= 0x9) { 5725 /* 5726 * Don't allow DT transmission rates if the 5727 * device does not support it. 5728 */ 5729 cts->sync_period = 0xa; 5730 } 5731 if ((inq_data->spi3data & SID_SPI_IUS) == 0 5732 && cts->sync_period <= 0x8) { 5733 /* 5734 * Don't allow PACE transmission rates 5735 * if the device does support packetized 5736 * transfers. 5737 */ 5738 cts->sync_period = 0x9; 5739 } 5740 } 5741 5742 switch (cts->bus_width) { 5743 case MSG_EXT_WDTR_BUS_32_BIT: 5744 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5745 || (inq_data->flags & SID_WBus32) != 0) 5746 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 5747 break; 5748 /* Fall Through to 16-bit */ 5749 case MSG_EXT_WDTR_BUS_16_BIT: 5750 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 5751 || (inq_data->flags & SID_WBus16) != 0) 5752 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 5753 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 5754 break; 5755 } 5756 /* Fall Through to 8-bit */ 5757 default: /* New bus width?? */ 5758 case MSG_EXT_WDTR_BUS_8_BIT: 5759 /* All targets can do this */ 5760 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 5761 break; 5762 } 5763 5764 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 5765 /* 5766 * Can't tag queue without disconnection. 5767 */ 5768 cts->flags &= ~CCB_TRANS_TAG_ENB; 5769 cts->valid |= CCB_TRANS_TQ_VALID; 5770 } 5771 5772 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 5773 || (inq_data->flags & SID_CmdQue) == 0 5774 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 5775 || (device->quirk->mintags == 0)) { 5776 /* 5777 * Can't tag on hardware that doesn't support, 5778 * doesn't have it enabled, or has broken tag support. 5779 */ 5780 cts->flags &= ~CCB_TRANS_TAG_ENB; 5781 } 5782 } 5783 5784 qfrozen = FALSE; 5785 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 5786 int device_tagenb; 5787 5788 /* 5789 * If we are transitioning from tags to no-tags or 5790 * vice-versa, we need to carefully freeze and restart 5791 * the queue so that we don't overlap tagged and non-tagged 5792 * commands. We also temporarily stop tags if there is 5793 * a change in transfer negotiation settings to allow 5794 * "tag-less" negotiation. 5795 */ 5796 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5797 || (device->inq_flags & SID_CmdQue) != 0) 5798 device_tagenb = TRUE; 5799 else 5800 device_tagenb = FALSE; 5801 5802 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 5803 && device_tagenb == FALSE) 5804 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 5805 && device_tagenb == TRUE)) { 5806 5807 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 5808 /* 5809 * Delay change to use tags until after a 5810 * few commands have gone to this device so 5811 * the controller has time to perform transfer 5812 * negotiations without tagged messages getting 5813 * in the way. 5814 */ 5815 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 5816 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 5817 } else { 5818 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 5819 qfrozen = TRUE; 5820 device->inq_flags &= ~SID_CmdQue; 5821 xpt_dev_ccbq_resize(cts->ccb_h.path, 5822 sim->max_dev_openings); 5823 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5824 device->tag_delay_count = 0; 5825 } 5826 } 5827 } 5828 5829 if (async_update == FALSE) { 5830 /* 5831 * If we are currently performing tagged transactions to 5832 * this device and want to change its negotiation parameters, 5833 * go non-tagged for a bit to give the controller a chance to 5834 * negotiate unhampered by tag messages. 5835 */ 5836 if ((device->inq_flags & SID_CmdQue) != 0 5837 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 5838 CCB_TRANS_SYNC_OFFSET_VALID| 5839 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 5840 xpt_toggle_tags(cts->ccb_h.path); 5841 5842 (*(sim->sim_action))(sim, (union ccb *)cts); 5843 } 5844 5845 if (qfrozen) { 5846 struct ccb_relsim crs; 5847 5848 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 5849 /*priority*/1); 5850 crs.ccb_h.func_code = XPT_REL_SIMQ; 5851 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5852 crs.openings 5853 = crs.release_timeout 5854 = crs.qfrozen_cnt 5855 = 0; 5856 xpt_action((union ccb *)&crs); 5857 } 5858 } 5859 5860 static void 5861 xpt_toggle_tags(struct cam_path *path) 5862 { 5863 struct cam_ed *dev; 5864 5865 /* 5866 * Give controllers a chance to renegotiate 5867 * before starting tag operations. We 5868 * "toggle" tagged queuing off then on 5869 * which causes the tag enable command delay 5870 * counter to come into effect. 5871 */ 5872 dev = path->device; 5873 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 5874 || ((dev->inq_flags & SID_CmdQue) != 0 5875 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 5876 struct ccb_trans_settings cts; 5877 5878 xpt_setup_ccb(&cts.ccb_h, path, 1); 5879 cts.flags = 0; 5880 cts.valid = CCB_TRANS_TQ_VALID; 5881 xpt_set_transfer_settings(&cts, path->device, 5882 /*async_update*/TRUE); 5883 cts.flags = CCB_TRANS_TAG_ENB; 5884 xpt_set_transfer_settings(&cts, path->device, 5885 /*async_update*/TRUE); 5886 } 5887 } 5888 5889 static void 5890 xpt_start_tags(struct cam_path *path) 5891 { 5892 struct ccb_relsim crs; 5893 struct cam_ed *device; 5894 struct cam_sim *sim; 5895 int newopenings; 5896 5897 device = path->device; 5898 sim = path->bus->sim; 5899 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 5900 xpt_freeze_devq(path, /*count*/1); 5901 device->inq_flags |= SID_CmdQue; 5902 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 5903 xpt_dev_ccbq_resize(path, newopenings); 5904 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 5905 crs.ccb_h.func_code = XPT_REL_SIMQ; 5906 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 5907 crs.openings 5908 = crs.release_timeout 5909 = crs.qfrozen_cnt 5910 = 0; 5911 xpt_action((union ccb *)&crs); 5912 } 5913 5914 static int busses_to_config; 5915 static int busses_to_reset; 5916 5917 static int 5918 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 5919 { 5920 if (bus->path_id != CAM_XPT_PATH_ID) { 5921 struct cam_path path; 5922 struct ccb_pathinq cpi; 5923 int can_negotiate; 5924 5925 busses_to_config++; 5926 xpt_compile_path(&path, NULL, bus->path_id, 5927 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 5928 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 5929 cpi.ccb_h.func_code = XPT_PATH_INQ; 5930 xpt_action((union ccb *)&cpi); 5931 can_negotiate = cpi.hba_inquiry; 5932 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 5933 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 5934 && can_negotiate) 5935 busses_to_reset++; 5936 xpt_release_path(&path); 5937 } 5938 5939 return(1); 5940 } 5941 5942 static int 5943 xptconfigfunc(struct cam_eb *bus, void *arg) 5944 { 5945 struct cam_path *path; 5946 union ccb *work_ccb; 5947 5948 if (bus->path_id != CAM_XPT_PATH_ID) { 5949 cam_status status; 5950 int can_negotiate; 5951 5952 work_ccb = xpt_alloc_ccb(); 5953 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 5954 CAM_TARGET_WILDCARD, 5955 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 5956 kprintf("xptconfigfunc: xpt_create_path failed with " 5957 "status %#x for bus %d\n", status, bus->path_id); 5958 kprintf("xptconfigfunc: halting bus configuration\n"); 5959 xpt_free_ccb(work_ccb); 5960 busses_to_config--; 5961 xpt_finishconfig(xpt_periph, NULL); 5962 return(0); 5963 } 5964 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5965 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5966 xpt_action(work_ccb); 5967 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5968 kprintf("xptconfigfunc: CPI failed on bus %d " 5969 "with status %d\n", bus->path_id, 5970 work_ccb->ccb_h.status); 5971 xpt_finishconfig(xpt_periph, work_ccb); 5972 return(1); 5973 } 5974 5975 can_negotiate = work_ccb->cpi.hba_inquiry; 5976 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 5977 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 5978 && (can_negotiate != 0)) { 5979 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 5980 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5981 work_ccb->ccb_h.cbfcnp = NULL; 5982 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 5983 ("Resetting Bus\n")); 5984 xpt_action(work_ccb); 5985 xpt_finishconfig(xpt_periph, work_ccb); 5986 } else { 5987 /* Act as though we performed a successful BUS RESET */ 5988 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 5989 xpt_finishconfig(xpt_periph, work_ccb); 5990 } 5991 } 5992 5993 return(1); 5994 } 5995 5996 static void 5997 xpt_config(void *arg) 5998 { 5999 /* Now that interrupts are enabled, go find our devices */ 6000 6001 #ifdef CAMDEBUG 6002 /* Setup debugging flags and path */ 6003 #ifdef CAM_DEBUG_FLAGS 6004 cam_dflags = CAM_DEBUG_FLAGS; 6005 #else /* !CAM_DEBUG_FLAGS */ 6006 cam_dflags = CAM_DEBUG_NONE; 6007 #endif /* CAM_DEBUG_FLAGS */ 6008 #ifdef CAM_DEBUG_BUS 6009 if (cam_dflags != CAM_DEBUG_NONE) { 6010 if (xpt_create_path(&cam_dpath, xpt_periph, 6011 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6012 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6013 kprintf("xpt_config: xpt_create_path() failed for debug" 6014 " target %d:%d:%d, debugging disabled\n", 6015 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6016 cam_dflags = CAM_DEBUG_NONE; 6017 } 6018 } else 6019 cam_dpath = NULL; 6020 #else /* !CAM_DEBUG_BUS */ 6021 cam_dpath = NULL; 6022 #endif /* CAM_DEBUG_BUS */ 6023 #endif /* CAMDEBUG */ 6024 6025 /* 6026 * Scan all installed busses. 6027 */ 6028 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6029 6030 if (busses_to_config == 0) { 6031 /* Call manually because we don't have any busses */ 6032 xpt_finishconfig(xpt_periph, NULL); 6033 } else { 6034 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) { 6035 kprintf("Waiting %d seconds for SCSI " 6036 "devices to settle\n", SCSI_DELAY/1000); 6037 } 6038 xpt_for_all_busses(xptconfigfunc, NULL); 6039 } 6040 } 6041 6042 /* 6043 * If the given device only has one peripheral attached to it, and if that 6044 * peripheral is the passthrough driver, announce it. This insures that the 6045 * user sees some sort of announcement for every peripheral in their system. 6046 */ 6047 static int 6048 xptpassannouncefunc(struct cam_ed *device, void *arg) 6049 { 6050 struct cam_periph *periph; 6051 int i; 6052 6053 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6054 periph = SLIST_NEXT(periph, periph_links), i++); 6055 6056 periph = SLIST_FIRST(&device->periphs); 6057 if ((i == 1) 6058 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6059 xpt_announce_periph(periph, NULL); 6060 6061 return(1); 6062 } 6063 6064 static void 6065 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6066 { 6067 struct periph_driver **p_drv; 6068 6069 if (done_ccb != NULL) { 6070 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6071 ("xpt_finishconfig\n")); 6072 switch(done_ccb->ccb_h.func_code) { 6073 case XPT_RESET_BUS: 6074 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6075 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6076 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6077 xpt_action(done_ccb); 6078 return; 6079 } 6080 /* FALLTHROUGH */ 6081 case XPT_SCAN_BUS: 6082 default: 6083 xpt_free_path(done_ccb->ccb_h.path); 6084 busses_to_config--; 6085 break; 6086 } 6087 } 6088 6089 if (busses_to_config == 0) { 6090 /* Register all the peripheral drivers */ 6091 /* XXX This will have to change when we have loadable modules */ 6092 SET_FOREACH(p_drv, periphdriver_set) { 6093 (*p_drv)->init(); 6094 } 6095 6096 /* 6097 * Check for devices with no "standard" peripheral driver 6098 * attached. For any devices like that, announce the 6099 * passthrough driver so the user will see something. 6100 */ 6101 xpt_for_all_devices(xptpassannouncefunc, NULL); 6102 6103 /* Release our hook so that the boot can continue. */ 6104 config_intrhook_disestablish(xpt_config_hook); 6105 kfree(xpt_config_hook, M_TEMP); 6106 xpt_config_hook = NULL; 6107 } 6108 if (done_ccb != NULL) 6109 xpt_free_ccb(done_ccb); 6110 } 6111 6112 static void 6113 xptaction(struct cam_sim *sim, union ccb *work_ccb) 6114 { 6115 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6116 6117 switch (work_ccb->ccb_h.func_code) { 6118 /* Common cases first */ 6119 case XPT_PATH_INQ: /* Path routing inquiry */ 6120 { 6121 struct ccb_pathinq *cpi; 6122 6123 cpi = &work_ccb->cpi; 6124 cpi->version_num = 1; /* XXX??? */ 6125 cpi->hba_inquiry = 0; 6126 cpi->target_sprt = 0; 6127 cpi->hba_misc = 0; 6128 cpi->hba_eng_cnt = 0; 6129 cpi->max_target = 0; 6130 cpi->max_lun = 0; 6131 cpi->initiator_id = 0; 6132 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6133 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6134 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6135 cpi->unit_number = sim->unit_number; 6136 cpi->bus_id = sim->bus_id; 6137 cpi->base_transfer_speed = 0; 6138 cpi->ccb_h.status = CAM_REQ_CMP; 6139 xpt_done(work_ccb); 6140 break; 6141 } 6142 default: 6143 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6144 xpt_done(work_ccb); 6145 break; 6146 } 6147 } 6148 6149 /* 6150 * The xpt as a "controller" has no interrupt sources, so polling 6151 * is a no-op. 6152 */ 6153 static void 6154 xptpoll(struct cam_sim *sim) 6155 { 6156 } 6157 6158 /* 6159 * Should only be called by the machine interrupt dispatch routines, 6160 * so put these prototypes here instead of in the header. 6161 */ 6162 6163 static void 6164 swi_camnet(void *arg, void *frame) 6165 { 6166 camisr(&cam_netq); 6167 } 6168 6169 static void 6170 swi_cambio(void *arg, void *frame) 6171 { 6172 camisr(&cam_bioq); 6173 } 6174 6175 static void 6176 camisr(cam_isrq_t *queue) 6177 { 6178 struct ccb_hdr *ccb_h; 6179 6180 crit_enter(); 6181 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6182 int runq; 6183 6184 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6185 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6186 splz(); 6187 6188 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6189 ("camisr\n")); 6190 6191 runq = FALSE; 6192 6193 if (ccb_h->flags & CAM_HIGH_POWER) { 6194 struct highpowerlist *hphead; 6195 struct cam_ed *device; 6196 union ccb *send_ccb; 6197 6198 hphead = &highpowerq; 6199 6200 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6201 6202 /* 6203 * Increment the count since this command is done. 6204 */ 6205 num_highpower++; 6206 6207 /* 6208 * Any high powered commands queued up? 6209 */ 6210 if (send_ccb != NULL) { 6211 device = send_ccb->ccb_h.path->device; 6212 6213 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6214 6215 xpt_release_devq(send_ccb->ccb_h.path, 6216 /*count*/1, /*runqueue*/TRUE); 6217 } 6218 } 6219 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6220 struct cam_ed *dev; 6221 6222 dev = ccb_h->path->device; 6223 6224 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6225 6226 if (ccb_h->path->bus->sim->devq) { 6227 ccb_h->path->bus->sim->devq->send_active--; 6228 ccb_h->path->bus->sim->devq->send_openings++; 6229 } 6230 6231 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6232 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6233 && (dev->ccbq.dev_active == 0))) { 6234 6235 xpt_release_devq(ccb_h->path, /*count*/1, 6236 /*run_queue*/TRUE); 6237 } 6238 6239 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6240 && (--dev->tag_delay_count == 0)) 6241 xpt_start_tags(ccb_h->path); 6242 6243 if ((dev->ccbq.queue.entries > 0) 6244 && (dev->qfrozen_cnt == 0) 6245 && (device_is_send_queued(dev) == 0)) { 6246 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6247 dev); 6248 } 6249 } 6250 6251 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6252 xpt_release_simq(ccb_h->path->bus->sim, 6253 /*run_queue*/TRUE); 6254 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6255 runq = FALSE; 6256 } 6257 6258 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6259 && (ccb_h->status & CAM_DEV_QFRZN)) { 6260 xpt_release_devq(ccb_h->path, /*count*/1, 6261 /*run_queue*/TRUE); 6262 ccb_h->status &= ~CAM_DEV_QFRZN; 6263 } else if (runq) { 6264 xpt_run_dev_sendq(ccb_h->path->bus); 6265 } 6266 6267 /* Call the peripheral driver's callback */ 6268 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6269 } 6270 crit_exit(); 6271 } 6272