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 1.40 2007/11/18 17:53:01 pavalos Exp $ 31 */ 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/time.h> 38 #include <sys/conf.h> 39 #include <sys/device.h> 40 #include <sys/fcntl.h> 41 #include <sys/md5.h> 42 #include <sys/devicestat.h> 43 #include <sys/interrupt.h> 44 #include <sys/sbuf.h> 45 #include <sys/bus.h> 46 #include <sys/thread.h> 47 #include <sys/thread2.h> 48 49 #include <machine/clock.h> 50 51 #include "cam.h" 52 #include "cam_ccb.h" 53 #include "cam_periph.h" 54 #include "cam_sim.h" 55 #include "cam_xpt.h" 56 #include "cam_xpt_sim.h" 57 #include "cam_xpt_periph.h" 58 #include "cam_debug.h" 59 60 #include "scsi/scsi_all.h" 61 #include "scsi/scsi_message.h" 62 #include "scsi/scsi_pass.h" 63 #include "opt_cam.h" 64 65 /* Datastructures internal to the xpt layer */ 66 67 /* 68 * Definition of an async handler callback block. These are used to add 69 * SIMs and peripherals to the async callback lists. 70 */ 71 struct async_node { 72 SLIST_ENTRY(async_node) links; 73 u_int32_t event_enable; /* Async Event enables */ 74 void (*callback)(void *arg, u_int32_t code, 75 struct cam_path *path, void *args); 76 void *callback_arg; 77 }; 78 79 SLIST_HEAD(async_list, async_node); 80 SLIST_HEAD(periph_list, cam_periph); 81 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; 82 83 /* 84 * This is the maximum number of high powered commands (e.g. start unit) 85 * that can be outstanding at a particular time. 86 */ 87 #ifndef CAM_MAX_HIGHPOWER 88 #define CAM_MAX_HIGHPOWER 4 89 #endif 90 91 /* number of high powered commands that can go through right now */ 92 static int num_highpower = CAM_MAX_HIGHPOWER; 93 94 /* 95 * Structure for queueing a device in a run queue. 96 * There is one run queue for allocating new ccbs, 97 * and another for sending ccbs to the controller. 98 */ 99 struct cam_ed_qinfo { 100 cam_pinfo pinfo; 101 struct cam_ed *device; 102 }; 103 104 /* 105 * The CAM EDT (Existing Device Table) contains the device information for 106 * all devices for all busses in the system. The table contains a 107 * cam_ed structure for each device on the bus. 108 */ 109 struct cam_ed { 110 TAILQ_ENTRY(cam_ed) links; 111 struct cam_ed_qinfo alloc_ccb_entry; 112 struct cam_ed_qinfo send_ccb_entry; 113 struct cam_et *target; 114 lun_id_t lun_id; 115 struct camq drvq; /* 116 * Queue of type drivers wanting to do 117 * work on this device. 118 */ 119 struct cam_ccbq ccbq; /* Queue of pending ccbs */ 120 struct async_list asyncs; /* Async callback info for this B/T/L */ 121 struct periph_list periphs; /* All attached devices */ 122 u_int generation; /* Generation number */ 123 struct cam_periph *owner; /* Peripheral driver's ownership tag */ 124 struct xpt_quirk_entry *quirk; /* Oddities about this device */ 125 /* Storage for the inquiry data */ 126 #ifdef CAM_NEW_TRAN_CODE 127 cam_proto protocol; 128 u_int protocol_version; 129 cam_xport transport; 130 u_int transport_version; 131 #endif /* CAM_NEW_TRAN_CODE */ 132 struct scsi_inquiry_data inq_data; 133 u_int8_t inq_flags; /* 134 * Current settings for inquiry flags. 135 * This allows us to override settings 136 * like disconnection and tagged 137 * queuing for a device. 138 */ 139 u_int8_t queue_flags; /* Queue flags from the control page */ 140 u_int8_t serial_num_len; 141 u_int8_t *serial_num; 142 u_int32_t qfrozen_cnt; 143 u_int32_t flags; 144 #define CAM_DEV_UNCONFIGURED 0x01 145 #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 146 #define CAM_DEV_REL_ON_COMPLETE 0x04 147 #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 148 #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 149 #define CAM_DEV_TAG_AFTER_COUNT 0x20 150 #define CAM_DEV_INQUIRY_DATA_VALID 0x40 151 u_int32_t tag_delay_count; 152 #define CAM_TAG_DELAY_COUNT 5 153 u_int32_t refcount; 154 struct callout c_handle; 155 }; 156 157 /* 158 * Each target is represented by an ET (Existing Target). These 159 * entries are created when a target is successfully probed with an 160 * identify, and removed when a device fails to respond after a number 161 * of retries, or a bus rescan finds the device missing. 162 */ 163 struct cam_et { 164 TAILQ_HEAD(, cam_ed) ed_entries; 165 TAILQ_ENTRY(cam_et) links; 166 struct cam_eb *bus; 167 target_id_t target_id; 168 u_int32_t refcount; 169 u_int generation; 170 struct timeval last_reset; /* uptime of last reset */ 171 }; 172 173 /* 174 * Each bus is represented by an EB (Existing Bus). These entries 175 * are created by calls to xpt_bus_register and deleted by calls to 176 * xpt_bus_deregister. 177 */ 178 struct cam_eb { 179 TAILQ_HEAD(, cam_et) et_entries; 180 TAILQ_ENTRY(cam_eb) links; 181 path_id_t path_id; 182 struct cam_sim *sim; 183 struct timeval last_reset; /* uptime of last reset */ 184 u_int32_t flags; 185 #define CAM_EB_RUNQ_SCHEDULED 0x01 186 u_int32_t refcount; 187 u_int generation; 188 }; 189 190 struct cam_path { 191 struct cam_periph *periph; 192 struct cam_eb *bus; 193 struct cam_et *target; 194 struct cam_ed *device; 195 }; 196 197 struct xpt_quirk_entry { 198 struct scsi_inquiry_pattern inq_pat; 199 u_int8_t quirks; 200 #define CAM_QUIRK_NOLUNS 0x01 201 #define CAM_QUIRK_NOSERIAL 0x02 202 #define CAM_QUIRK_HILUNS 0x04 203 u_int mintags; 204 u_int maxtags; 205 }; 206 #define CAM_SCSI2_MAXLUN 8 207 208 typedef enum { 209 XPT_FLAG_OPEN = 0x01 210 } xpt_flags; 211 212 struct xpt_softc { 213 xpt_flags flags; 214 u_int32_t generation; 215 }; 216 217 static const char quantum[] = "QUANTUM"; 218 static const char sony[] = "SONY"; 219 static const char west_digital[] = "WDIGTL"; 220 static const char samsung[] = "SAMSUNG"; 221 static const char seagate[] = "SEAGATE"; 222 static const char microp[] = "MICROP"; 223 224 static struct xpt_quirk_entry xpt_quirk_table[] = 225 { 226 { 227 /* Reports QUEUE FULL for temporary resource shortages */ 228 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, 229 /*quirks*/0, /*mintags*/24, /*maxtags*/32 230 }, 231 { 232 /* Reports QUEUE FULL for temporary resource shortages */ 233 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, 234 /*quirks*/0, /*mintags*/24, /*maxtags*/32 235 }, 236 { 237 /* Reports QUEUE FULL for temporary resource shortages */ 238 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, 239 /*quirks*/0, /*mintags*/24, /*maxtags*/32 240 }, 241 { 242 /* Broken tagged queuing drive */ 243 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, 244 /*quirks*/0, /*mintags*/0, /*maxtags*/0 245 }, 246 { 247 /* Broken tagged queuing drive */ 248 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, 249 /*quirks*/0, /*mintags*/0, /*maxtags*/0 250 }, 251 { 252 /* Broken tagged queuing drive */ 253 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, 254 /*quirks*/0, /*mintags*/0, /*maxtags*/0 255 }, 256 { 257 /* 258 * Unfortunately, the Quantum Atlas III has the same 259 * problem as the Atlas II drives above. 260 * Reported by: "Johan Granlund" <johan@granlund.nu> 261 * 262 * For future reference, the drive with the problem was: 263 * QUANTUM QM39100TD-SW N1B0 264 * 265 * It's possible that Quantum will fix the problem in later 266 * firmware revisions. If that happens, the quirk entry 267 * will need to be made specific to the firmware revisions 268 * with the problem. 269 * 270 */ 271 /* Reports QUEUE FULL for temporary resource shortages */ 272 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, 273 /*quirks*/0, /*mintags*/24, /*maxtags*/32 274 }, 275 { 276 /* 277 * 18 Gig Atlas III, same problem as the 9G version. 278 * Reported by: Andre Albsmeier 279 * <andre.albsmeier@mchp.siemens.de> 280 * 281 * For future reference, the drive with the problem was: 282 * QUANTUM QM318000TD-S N491 283 */ 284 /* Reports QUEUE FULL for temporary resource shortages */ 285 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, 286 /*quirks*/0, /*mintags*/24, /*maxtags*/32 287 }, 288 { 289 /* 290 * Broken tagged queuing drive 291 * Reported by: Bret Ford <bford@uop.cs.uop.edu> 292 * and: Martin Renters <martin@tdc.on.ca> 293 */ 294 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, 295 /*quirks*/0, /*mintags*/0, /*maxtags*/0 296 }, 297 /* 298 * The Seagate Medalist Pro drives have very poor write 299 * performance with anything more than 2 tags. 300 * 301 * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> 302 * Drive: <SEAGATE ST36530N 1444> 303 * 304 * Reported by: Jeremy Lea <reg@shale.csir.co.za> 305 * Drive: <SEAGATE ST34520W 1281> 306 * 307 * No one has actually reported that the 9G version 308 * (ST39140*) of the Medalist Pro has the same problem, but 309 * we're assuming that it does because the 4G and 6.5G 310 * versions of the drive are broken. 311 */ 312 { 313 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, 314 /*quirks*/0, /*mintags*/2, /*maxtags*/2 315 }, 316 { 317 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, 318 /*quirks*/0, /*mintags*/2, /*maxtags*/2 319 }, 320 { 321 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, 322 /*quirks*/0, /*mintags*/2, /*maxtags*/2 323 }, 324 { 325 /* 326 * Slow when tagged queueing is enabled. Write performance 327 * steadily drops off with more and more concurrent 328 * transactions. Best sequential write performance with 329 * tagged queueing turned off and write caching turned on. 330 * 331 * PR: kern/10398 332 * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> 333 * Drive: DCAS-34330 w/ "S65A" firmware. 334 * 335 * The drive with the problem had the "S65A" firmware 336 * revision, and has also been reported (by Stephen J. 337 * Roznowski <sjr@home.net>) for a drive with the "S61A" 338 * firmware revision. 339 * 340 * Although no one has reported problems with the 2 gig 341 * version of the DCAS drive, the assumption is that it 342 * has the same problems as the 4 gig version. Therefore 343 * this quirk entries disables tagged queueing for all 344 * DCAS drives. 345 */ 346 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, 347 /*quirks*/0, /*mintags*/0, /*maxtags*/0 348 }, 349 { 350 /* Broken tagged queuing drive */ 351 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, 352 /*quirks*/0, /*mintags*/0, /*maxtags*/0 353 }, 354 { 355 /* Broken tagged queuing drive */ 356 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, 357 /*quirks*/0, /*mintags*/0, /*maxtags*/0 358 }, 359 { 360 /* 361 * Broken tagged queuing drive. 362 * Submitted by: 363 * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> 364 * in PR kern/9535 365 */ 366 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, 367 /*quirks*/0, /*mintags*/0, /*maxtags*/0 368 }, 369 { 370 /* 371 * Slow when tagged queueing is enabled. (1.5MB/sec versus 372 * 8MB/sec.) 373 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 374 * Best performance with these drives is achieved with 375 * tagged queueing turned off, and write caching turned on. 376 */ 377 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, 378 /*quirks*/0, /*mintags*/0, /*maxtags*/0 379 }, 380 { 381 /* 382 * Slow when tagged queueing is enabled. (1.5MB/sec versus 383 * 8MB/sec.) 384 * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> 385 * Best performance with these drives is achieved with 386 * tagged queueing turned off, and write caching turned on. 387 */ 388 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, 389 /*quirks*/0, /*mintags*/0, /*maxtags*/0 390 }, 391 { 392 /* 393 * Doesn't handle queue full condition correctly, 394 * so we need to limit maxtags to what the device 395 * can handle instead of determining this automatically. 396 */ 397 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, 398 /*quirks*/0, /*mintags*/2, /*maxtags*/32 399 }, 400 { 401 /* Really only one LUN */ 402 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, 403 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 404 }, 405 { 406 /* I can't believe we need a quirk for DPT volumes. */ 407 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, 408 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, 409 /*mintags*/0, /*maxtags*/255 410 }, 411 { 412 /* 413 * Many Sony CDROM drives don't like multi-LUN probing. 414 */ 415 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, 416 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 417 }, 418 { 419 /* 420 * This drive doesn't like multiple LUN probing. 421 * Submitted by: Parag Patel <parag@cgt.com> 422 */ 423 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, 424 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 425 }, 426 { 427 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, 428 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 429 }, 430 { 431 /* 432 * The 8200 doesn't like multi-lun probing, and probably 433 * don't like serial number requests either. 434 */ 435 { 436 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 437 "EXB-8200*", "*" 438 }, 439 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 440 }, 441 { 442 /* 443 * Let's try the same as above, but for a drive that says 444 * it's an IPL-6860 but is actually an EXB 8200. 445 */ 446 { 447 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", 448 "IPL-6860*", "*" 449 }, 450 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 451 }, 452 { 453 /* 454 * These Hitachi drives don't like multi-lun probing. 455 * The PR submitter has a DK319H, but says that the Linux 456 * kernel has a similar work-around for the DK312 and DK314, 457 * so all DK31* drives are quirked here. 458 * PR: misc/18793 459 * Submitted by: Paul Haddad <paul@pth.com> 460 */ 461 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, 462 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 463 }, 464 { 465 /* 466 * This old revision of the TDC3600 is also SCSI-1, and 467 * hangs upon serial number probing. 468 */ 469 { 470 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", 471 " TDC 3600", "U07:" 472 }, 473 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 474 }, 475 { 476 /* 477 * Would repond to all LUNs if asked for. 478 */ 479 { 480 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", 481 "CP150", "*" 482 }, 483 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 484 }, 485 { 486 /* 487 * Would repond to all LUNs if asked for. 488 */ 489 { 490 T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", 491 "96X2*", "*" 492 }, 493 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 494 }, 495 { 496 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 497 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, 498 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 499 }, 500 { 501 /* Submitted by: Matthew Dodd <winter@jurai.net> */ 502 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, 503 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 504 }, 505 { 506 /* TeraSolutions special settings for TRC-22 RAID */ 507 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, 508 /*quirks*/0, /*mintags*/55, /*maxtags*/255 509 }, 510 { 511 /* Veritas Storage Appliance */ 512 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, 513 CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 514 }, 515 { 516 /* 517 * Would respond to all LUNs. Device type and removable 518 * flag are jumper-selectable. 519 */ 520 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", 521 "Tahiti 1", "*" 522 }, 523 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 524 }, 525 { 526 /* Default tagged queuing parameters for all devices */ 527 { 528 T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, 529 /*vendor*/"*", /*product*/"*", /*revision*/"*" 530 }, 531 /*quirks*/0, /*mintags*/2, /*maxtags*/255 532 }, 533 }; 534 535 static const int xpt_quirk_table_size = 536 sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); 537 538 typedef enum { 539 DM_RET_COPY = 0x01, 540 DM_RET_FLAG_MASK = 0x0f, 541 DM_RET_NONE = 0x00, 542 DM_RET_STOP = 0x10, 543 DM_RET_DESCEND = 0x20, 544 DM_RET_ERROR = 0x30, 545 DM_RET_ACTION_MASK = 0xf0 546 } dev_match_ret; 547 548 typedef enum { 549 XPT_DEPTH_BUS, 550 XPT_DEPTH_TARGET, 551 XPT_DEPTH_DEVICE, 552 XPT_DEPTH_PERIPH 553 } xpt_traverse_depth; 554 555 struct xpt_traverse_config { 556 xpt_traverse_depth depth; 557 void *tr_func; 558 void *tr_arg; 559 }; 560 561 typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); 562 typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); 563 typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); 564 typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); 565 typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); 566 567 /* Transport layer configuration information */ 568 static struct xpt_softc xsoftc; 569 570 /* Queues for our software interrupt handler */ 571 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; 572 static cam_isrq_t cam_bioq; 573 static cam_isrq_t cam_netq; 574 575 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */ 576 static SLIST_HEAD(,ccb_hdr) ccb_freeq; 577 static u_int xpt_max_ccbs; /* 578 * Maximum size of ccb pool. Modified as 579 * devices are added/removed or have their 580 * opening counts changed. 581 */ 582 static u_int xpt_ccb_count; /* Current count of allocated ccbs */ 583 584 struct cam_periph *xpt_periph; 585 586 static periph_init_t xpt_periph_init; 587 588 static periph_init_t probe_periph_init; 589 590 static struct periph_driver xpt_driver = 591 { 592 xpt_periph_init, "xpt", 593 TAILQ_HEAD_INITIALIZER(xpt_driver.units) 594 }; 595 596 static struct periph_driver probe_driver = 597 { 598 probe_periph_init, "probe", 599 TAILQ_HEAD_INITIALIZER(probe_driver.units) 600 }; 601 602 PERIPHDRIVER_DECLARE(xpt, xpt_driver); 603 PERIPHDRIVER_DECLARE(probe, probe_driver); 604 605 #define XPT_CDEV_MAJOR 104 606 607 static d_open_t xptopen; 608 static d_close_t xptclose; 609 static d_ioctl_t xptioctl; 610 611 static struct dev_ops xpt_ops = { 612 { "xpt", XPT_CDEV_MAJOR, 0 }, 613 .d_open = xptopen, 614 .d_close = xptclose, 615 .d_ioctl = xptioctl 616 }; 617 618 static struct intr_config_hook *xpt_config_hook; 619 620 /* Registered busses */ 621 static TAILQ_HEAD(,cam_eb) xpt_busses; 622 static u_int bus_generation; 623 624 /* Storage for debugging datastructures */ 625 #ifdef CAMDEBUG 626 struct cam_path *cam_dpath; 627 u_int32_t cam_dflags; 628 u_int32_t cam_debug_delay; 629 #endif 630 631 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) 632 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" 633 #endif 634 635 /* 636 * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG 637 * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, 638 * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. 639 */ 640 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ 641 || defined(CAM_DEBUG_LUN) 642 #ifdef CAMDEBUG 643 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ 644 || !defined(CAM_DEBUG_LUN) 645 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ 646 and CAM_DEBUG_LUN" 647 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ 648 #else /* !CAMDEBUG */ 649 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" 650 #endif /* CAMDEBUG */ 651 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ 652 653 /* Our boot-time initialization hook */ 654 static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); 655 656 static moduledata_t cam_moduledata = { 657 "cam", 658 cam_module_event_handler, 659 NULL 660 }; 661 662 static void xpt_init(void *); 663 664 DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); 665 MODULE_VERSION(cam, 1); 666 667 668 static cam_status xpt_compile_path(struct cam_path *new_path, 669 struct cam_periph *perph, 670 path_id_t path_id, 671 target_id_t target_id, 672 lun_id_t lun_id); 673 674 static void xpt_release_path(struct cam_path *path); 675 676 static void xpt_async_bcast(struct async_list *async_head, 677 u_int32_t async_code, 678 struct cam_path *path, 679 void *async_arg); 680 static void xpt_dev_async(u_int32_t async_code, 681 struct cam_eb *bus, 682 struct cam_et *target, 683 struct cam_ed *device, 684 void *async_arg); 685 static path_id_t xptnextfreepathid(void); 686 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); 687 static union ccb *xpt_get_ccb(struct cam_ed *device); 688 static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, 689 u_int32_t new_priority); 690 static void xpt_run_dev_allocq(struct cam_eb *bus); 691 static void xpt_run_dev_sendq(struct cam_eb *bus); 692 static timeout_t xpt_release_devq_timeout; 693 static void xpt_release_bus(struct cam_eb *bus); 694 static void xpt_release_devq_device(struct cam_ed *dev, u_int count, 695 int run_queue); 696 static struct cam_et* 697 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); 698 static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); 699 static struct cam_ed* 700 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, 701 lun_id_t lun_id); 702 static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, 703 struct cam_ed *device); 704 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); 705 static struct cam_eb* 706 xpt_find_bus(path_id_t path_id); 707 static struct cam_et* 708 xpt_find_target(struct cam_eb *bus, target_id_t target_id); 709 static struct cam_ed* 710 xpt_find_device(struct cam_et *target, lun_id_t lun_id); 711 static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); 712 static void xpt_scan_lun(struct cam_periph *periph, 713 struct cam_path *path, cam_flags flags, 714 union ccb *ccb); 715 static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); 716 static xpt_busfunc_t xptconfigbuscountfunc; 717 static xpt_busfunc_t xptconfigfunc; 718 static void xpt_config(void *arg); 719 static xpt_devicefunc_t xptpassannouncefunc; 720 static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); 721 static void xptaction(struct cam_sim *sim, union ccb *work_ccb); 722 static void xptpoll(struct cam_sim *sim); 723 static inthand2_t swi_camnet; 724 static inthand2_t swi_cambio; 725 static void camisr(cam_isrq_t *queue); 726 #if 0 727 static void xptstart(struct cam_periph *periph, union ccb *work_ccb); 728 static void xptasync(struct cam_periph *periph, 729 u_int32_t code, cam_path *path); 730 #endif 731 static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, 732 u_int num_patterns, struct cam_eb *bus); 733 static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, 734 u_int num_patterns, 735 struct cam_ed *device); 736 static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, 737 u_int num_patterns, 738 struct cam_periph *periph); 739 static xpt_busfunc_t xptedtbusfunc; 740 static xpt_targetfunc_t xptedttargetfunc; 741 static xpt_devicefunc_t xptedtdevicefunc; 742 static xpt_periphfunc_t xptedtperiphfunc; 743 static xpt_pdrvfunc_t xptplistpdrvfunc; 744 static xpt_periphfunc_t xptplistperiphfunc; 745 static int xptedtmatch(struct ccb_dev_match *cdm); 746 static int xptperiphlistmatch(struct ccb_dev_match *cdm); 747 static int xptbustraverse(struct cam_eb *start_bus, 748 xpt_busfunc_t *tr_func, void *arg); 749 static int xpttargettraverse(struct cam_eb *bus, 750 struct cam_et *start_target, 751 xpt_targetfunc_t *tr_func, void *arg); 752 static int xptdevicetraverse(struct cam_et *target, 753 struct cam_ed *start_device, 754 xpt_devicefunc_t *tr_func, void *arg); 755 static int xptperiphtraverse(struct cam_ed *device, 756 struct cam_periph *start_periph, 757 xpt_periphfunc_t *tr_func, void *arg); 758 static int xptpdrvtraverse(struct periph_driver **start_pdrv, 759 xpt_pdrvfunc_t *tr_func, void *arg); 760 static int xptpdperiphtraverse(struct periph_driver **pdrv, 761 struct cam_periph *start_periph, 762 xpt_periphfunc_t *tr_func, 763 void *arg); 764 static xpt_busfunc_t xptdefbusfunc; 765 static xpt_targetfunc_t xptdeftargetfunc; 766 static xpt_devicefunc_t xptdefdevicefunc; 767 static xpt_periphfunc_t xptdefperiphfunc; 768 static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); 769 #ifdef notusedyet 770 static int xpt_for_all_targets(xpt_targetfunc_t *tr_func, 771 void *arg); 772 #endif 773 static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, 774 void *arg); 775 #ifdef notusedyet 776 static int xpt_for_all_periphs(xpt_periphfunc_t *tr_func, 777 void *arg); 778 #endif 779 static xpt_devicefunc_t xptsetasyncfunc; 780 static xpt_busfunc_t xptsetasyncbusfunc; 781 static cam_status xptregister(struct cam_periph *periph, 782 void *arg); 783 static cam_status proberegister(struct cam_periph *periph, 784 void *arg); 785 static void probeschedule(struct cam_periph *probe_periph); 786 static void probestart(struct cam_periph *periph, union ccb *start_ccb); 787 static void proberequestdefaultnegotiation(struct cam_periph *periph); 788 static void probedone(struct cam_periph *periph, union ccb *done_ccb); 789 static void probecleanup(struct cam_periph *periph); 790 static void xpt_find_quirk(struct cam_ed *device); 791 #ifdef CAM_NEW_TRAN_CODE 792 static void xpt_devise_transport(struct cam_path *path); 793 #endif /* CAM_NEW_TRAN_CODE */ 794 static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, 795 struct cam_ed *device, 796 int async_update); 797 static void xpt_toggle_tags(struct cam_path *path); 798 static void xpt_start_tags(struct cam_path *path); 799 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, 800 struct cam_ed *dev); 801 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, 802 struct cam_ed *dev); 803 static __inline int periph_is_queued(struct cam_periph *periph); 804 static __inline int device_is_alloc_queued(struct cam_ed *device); 805 static __inline int device_is_send_queued(struct cam_ed *device); 806 static __inline int dev_allocq_is_runnable(struct cam_devq *devq); 807 808 static __inline int 809 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) 810 { 811 int retval; 812 813 if (bus->sim->devq && dev->ccbq.devq_openings > 0) { 814 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { 815 cam_ccbq_resize(&dev->ccbq, 816 dev->ccbq.dev_openings 817 + dev->ccbq.dev_active); 818 dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; 819 } 820 /* 821 * The priority of a device waiting for CCB resources 822 * is that of the the highest priority peripheral driver 823 * enqueued. 824 */ 825 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, 826 &dev->alloc_ccb_entry.pinfo, 827 CAMQ_GET_HEAD(&dev->drvq)->priority); 828 } else { 829 retval = 0; 830 } 831 832 return (retval); 833 } 834 835 static __inline int 836 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) 837 { 838 int retval; 839 840 if (bus->sim->devq && dev->ccbq.dev_openings > 0) { 841 /* 842 * The priority of a device waiting for controller 843 * resources is that of the the highest priority CCB 844 * enqueued. 845 */ 846 retval = 847 xpt_schedule_dev(&bus->sim->devq->send_queue, 848 &dev->send_ccb_entry.pinfo, 849 CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); 850 } else { 851 retval = 0; 852 } 853 return (retval); 854 } 855 856 static __inline int 857 periph_is_queued(struct cam_periph *periph) 858 { 859 return (periph->pinfo.index != CAM_UNQUEUED_INDEX); 860 } 861 862 static __inline int 863 device_is_alloc_queued(struct cam_ed *device) 864 { 865 return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 866 } 867 868 static __inline int 869 device_is_send_queued(struct cam_ed *device) 870 { 871 return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); 872 } 873 874 static __inline int 875 dev_allocq_is_runnable(struct cam_devq *devq) 876 { 877 /* 878 * Have work to do. 879 * Have space to do more work. 880 * Allowed to do work. 881 */ 882 return ((devq->alloc_queue.qfrozen_cnt == 0) 883 && (devq->alloc_queue.entries > 0) 884 && (devq->alloc_openings > 0)); 885 } 886 887 static void 888 xpt_periph_init(void) 889 { 890 dev_ops_add(&xpt_ops, 0, 0); 891 make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); 892 } 893 894 static void 895 probe_periph_init(void) 896 { 897 } 898 899 900 static void 901 xptdone(struct cam_periph *periph, union ccb *done_ccb) 902 { 903 /* Caller will release the CCB */ 904 wakeup(&done_ccb->ccb_h.cbfcnp); 905 } 906 907 static int 908 xptopen(struct dev_open_args *ap) 909 { 910 cdev_t dev = ap->a_head.a_dev; 911 int unit; 912 913 unit = minor(dev) & 0xff; 914 915 /* 916 * Only allow read-write access. 917 */ 918 if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) 919 return(EPERM); 920 921 /* 922 * We don't allow nonblocking access. 923 */ 924 if ((ap->a_oflags & O_NONBLOCK) != 0) { 925 kprintf("xpt%d: can't do nonblocking access\n", unit); 926 return(ENODEV); 927 } 928 929 /* 930 * We only have one transport layer right now. If someone accesses 931 * us via something other than minor number 1, point out their 932 * mistake. 933 */ 934 if (unit != 0) { 935 kprintf("xptopen: got invalid xpt unit %d\n", unit); 936 return(ENXIO); 937 } 938 939 /* Mark ourselves open */ 940 xsoftc.flags |= XPT_FLAG_OPEN; 941 942 return(0); 943 } 944 945 static int 946 xptclose(struct dev_close_args *ap) 947 { 948 cdev_t dev = ap->a_head.a_dev; 949 int unit; 950 951 unit = minor(dev) & 0xff; 952 953 /* 954 * We only have one transport layer right now. If someone accesses 955 * us via something other than minor number 1, point out their 956 * mistake. 957 */ 958 if (unit != 0) { 959 kprintf("xptclose: got invalid xpt unit %d\n", unit); 960 return(ENXIO); 961 } 962 963 /* Mark ourselves closed */ 964 xsoftc.flags &= ~XPT_FLAG_OPEN; 965 966 return(0); 967 } 968 969 static int 970 xptioctl(struct dev_ioctl_args *ap) 971 { 972 cdev_t dev = ap->a_head.a_dev; 973 int unit, error; 974 975 error = 0; 976 unit = minor(dev) & 0xff; 977 978 /* 979 * We only have one transport layer right now. If someone accesses 980 * us via something other than minor number 1, point out their 981 * mistake. 982 */ 983 if (unit != 0) { 984 kprintf("xptioctl: got invalid xpt unit %d\n", unit); 985 return(ENXIO); 986 } 987 988 switch(ap->a_cmd) { 989 /* 990 * For the transport layer CAMIOCOMMAND ioctl, we really only want 991 * to accept CCB types that don't quite make sense to send through a 992 * passthrough driver. 993 */ 994 case CAMIOCOMMAND: { 995 union ccb *ccb; 996 union ccb *inccb; 997 998 inccb = (union ccb *)ap->a_data; 999 1000 switch(inccb->ccb_h.func_code) { 1001 case XPT_SCAN_BUS: 1002 case XPT_RESET_BUS: 1003 if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) 1004 || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { 1005 error = EINVAL; 1006 break; 1007 } 1008 /* FALLTHROUGH */ 1009 case XPT_PATH_INQ: 1010 case XPT_ENG_INQ: 1011 case XPT_SCAN_LUN: 1012 1013 ccb = xpt_alloc_ccb(); 1014 1015 /* 1016 * Create a path using the bus, target, and lun the 1017 * user passed in. 1018 */ 1019 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, 1020 inccb->ccb_h.path_id, 1021 inccb->ccb_h.target_id, 1022 inccb->ccb_h.target_lun) != 1023 CAM_REQ_CMP){ 1024 error = EINVAL; 1025 xpt_free_ccb(ccb); 1026 break; 1027 } 1028 /* Ensure all of our fields are correct */ 1029 xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, 1030 inccb->ccb_h.pinfo.priority); 1031 xpt_merge_ccb(ccb, inccb); 1032 ccb->ccb_h.cbfcnp = xptdone; 1033 cam_periph_runccb(ccb, NULL, 0, 0, NULL); 1034 bcopy(ccb, inccb, sizeof(union ccb)); 1035 xpt_free_path(ccb->ccb_h.path); 1036 xpt_free_ccb(ccb); 1037 break; 1038 1039 case XPT_DEBUG: { 1040 union ccb ccb; 1041 1042 /* 1043 * This is an immediate CCB, so it's okay to 1044 * allocate it on the stack. 1045 */ 1046 1047 /* 1048 * Create a path using the bus, target, and lun the 1049 * user passed in. 1050 */ 1051 if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, 1052 inccb->ccb_h.path_id, 1053 inccb->ccb_h.target_id, 1054 inccb->ccb_h.target_lun) != 1055 CAM_REQ_CMP){ 1056 error = EINVAL; 1057 break; 1058 } 1059 /* Ensure all of our fields are correct */ 1060 xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, 1061 inccb->ccb_h.pinfo.priority); 1062 xpt_merge_ccb(&ccb, inccb); 1063 ccb.ccb_h.cbfcnp = xptdone; 1064 xpt_action(&ccb); 1065 bcopy(&ccb, inccb, sizeof(union ccb)); 1066 xpt_free_path(ccb.ccb_h.path); 1067 break; 1068 1069 } 1070 case XPT_DEV_MATCH: { 1071 struct cam_periph_map_info mapinfo; 1072 struct cam_path *old_path; 1073 1074 /* 1075 * We can't deal with physical addresses for this 1076 * type of transaction. 1077 */ 1078 if (inccb->ccb_h.flags & CAM_DATA_PHYS) { 1079 error = EINVAL; 1080 break; 1081 } 1082 1083 /* 1084 * Save this in case the caller had it set to 1085 * something in particular. 1086 */ 1087 old_path = inccb->ccb_h.path; 1088 1089 /* 1090 * We really don't need a path for the matching 1091 * code. The path is needed because of the 1092 * debugging statements in xpt_action(). They 1093 * assume that the CCB has a valid path. 1094 */ 1095 inccb->ccb_h.path = xpt_periph->path; 1096 1097 bzero(&mapinfo, sizeof(mapinfo)); 1098 1099 /* 1100 * Map the pattern and match buffers into kernel 1101 * virtual address space. 1102 */ 1103 error = cam_periph_mapmem(inccb, &mapinfo); 1104 1105 if (error) { 1106 inccb->ccb_h.path = old_path; 1107 break; 1108 } 1109 1110 /* 1111 * This is an immediate CCB, we can send it on directly. 1112 */ 1113 xpt_action(inccb); 1114 1115 /* 1116 * Map the buffers back into user space. 1117 */ 1118 cam_periph_unmapmem(inccb, &mapinfo); 1119 1120 inccb->ccb_h.path = old_path; 1121 1122 error = 0; 1123 break; 1124 } 1125 default: 1126 error = ENOTSUP; 1127 break; 1128 } 1129 break; 1130 } 1131 /* 1132 * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, 1133 * with the periphal driver name and unit name filled in. The other 1134 * fields don't really matter as input. The passthrough driver name 1135 * ("pass"), and unit number are passed back in the ccb. The current 1136 * device generation number, and the index into the device peripheral 1137 * driver list, and the status are also passed back. Note that 1138 * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, 1139 * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is 1140 * (or rather should be) impossible for the device peripheral driver 1141 * list to change since we look at the whole thing in one pass, and 1142 * we do it within a critical section. 1143 * 1144 */ 1145 case CAMGETPASSTHRU: { 1146 union ccb *ccb; 1147 struct cam_periph *periph; 1148 struct periph_driver **p_drv; 1149 char *name; 1150 u_int unit; 1151 u_int cur_generation; 1152 int base_periph_found; 1153 int splbreaknum; 1154 1155 ccb = (union ccb *)ap->a_data; 1156 unit = ccb->cgdl.unit_number; 1157 name = ccb->cgdl.periph_name; 1158 /* 1159 * Every 100 devices, we want to call splz() to check for 1160 * and allow the software interrupt handler a chance to run. 1161 * 1162 * Most systems won't run into this check, but this should 1163 * avoid starvation in the software interrupt handler in 1164 * large systems. 1165 */ 1166 splbreaknum = 100; 1167 1168 ccb = (union ccb *)ap->a_data; 1169 1170 base_periph_found = 0; 1171 1172 /* 1173 * Sanity check -- make sure we don't get a null peripheral 1174 * driver name. 1175 */ 1176 if (*ccb->cgdl.periph_name == '\0') { 1177 error = EINVAL; 1178 break; 1179 } 1180 1181 /* Keep the list from changing while we traverse it */ 1182 crit_enter(); 1183 ptstartover: 1184 cur_generation = xsoftc.generation; 1185 1186 /* first find our driver in the list of drivers */ 1187 for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { 1188 if (strcmp((*p_drv)->driver_name, name) == 0) 1189 break; 1190 } 1191 1192 if (*p_drv == NULL) { 1193 crit_exit(); 1194 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1195 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1196 *ccb->cgdl.periph_name = '\0'; 1197 ccb->cgdl.unit_number = 0; 1198 error = ENOENT; 1199 break; 1200 } 1201 1202 /* 1203 * Run through every peripheral instance of this driver 1204 * and check to see whether it matches the unit passed 1205 * in by the user. If it does, get out of the loops and 1206 * find the passthrough driver associated with that 1207 * peripheral driver. 1208 */ 1209 TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { 1210 1211 if (periph->unit_number == unit) { 1212 break; 1213 } else if (--splbreaknum == 0) { 1214 splz(); 1215 splbreaknum = 100; 1216 if (cur_generation != xsoftc.generation) 1217 goto ptstartover; 1218 } 1219 } 1220 /* 1221 * If we found the peripheral driver that the user passed 1222 * in, go through all of the peripheral drivers for that 1223 * particular device and look for a passthrough driver. 1224 */ 1225 if (periph != NULL) { 1226 struct cam_ed *device; 1227 int i; 1228 1229 base_periph_found = 1; 1230 device = periph->path->device; 1231 for (i = 0, periph = SLIST_FIRST(&device->periphs); 1232 periph != NULL; 1233 periph = SLIST_NEXT(periph, periph_links), i++) { 1234 /* 1235 * Check to see whether we have a 1236 * passthrough device or not. 1237 */ 1238 if (strcmp(periph->periph_name, "pass") == 0) { 1239 /* 1240 * Fill in the getdevlist fields. 1241 */ 1242 strcpy(ccb->cgdl.periph_name, 1243 periph->periph_name); 1244 ccb->cgdl.unit_number = 1245 periph->unit_number; 1246 if (SLIST_NEXT(periph, periph_links)) 1247 ccb->cgdl.status = 1248 CAM_GDEVLIST_MORE_DEVS; 1249 else 1250 ccb->cgdl.status = 1251 CAM_GDEVLIST_LAST_DEVICE; 1252 ccb->cgdl.generation = 1253 device->generation; 1254 ccb->cgdl.index = i; 1255 /* 1256 * Fill in some CCB header fields 1257 * that the user may want. 1258 */ 1259 ccb->ccb_h.path_id = 1260 periph->path->bus->path_id; 1261 ccb->ccb_h.target_id = 1262 periph->path->target->target_id; 1263 ccb->ccb_h.target_lun = 1264 periph->path->device->lun_id; 1265 ccb->ccb_h.status = CAM_REQ_CMP; 1266 break; 1267 } 1268 } 1269 } 1270 1271 /* 1272 * If the periph is null here, one of two things has 1273 * happened. The first possibility is that we couldn't 1274 * find the unit number of the particular peripheral driver 1275 * that the user is asking about. e.g. the user asks for 1276 * the passthrough driver for "da11". We find the list of 1277 * "da" peripherals all right, but there is no unit 11. 1278 * The other possibility is that we went through the list 1279 * of peripheral drivers attached to the device structure, 1280 * but didn't find one with the name "pass". Either way, 1281 * we return ENOENT, since we couldn't find something. 1282 */ 1283 if (periph == NULL) { 1284 ccb->ccb_h.status = CAM_REQ_CMP_ERR; 1285 ccb->cgdl.status = CAM_GDEVLIST_ERROR; 1286 *ccb->cgdl.periph_name = '\0'; 1287 ccb->cgdl.unit_number = 0; 1288 error = ENOENT; 1289 /* 1290 * It is unfortunate that this is even necessary, 1291 * but there are many, many clueless users out there. 1292 * If this is true, the user is looking for the 1293 * passthrough driver, but doesn't have one in his 1294 * kernel. 1295 */ 1296 if (base_periph_found == 1) { 1297 kprintf("xptioctl: pass driver is not in the " 1298 "kernel\n"); 1299 kprintf("xptioctl: put \"device pass0\" in " 1300 "your kernel config file\n"); 1301 } 1302 } 1303 crit_exit(); 1304 break; 1305 } 1306 default: 1307 error = ENOTTY; 1308 break; 1309 } 1310 1311 return(error); 1312 } 1313 1314 static int 1315 cam_module_event_handler(module_t mod, int what, void *arg) 1316 { 1317 if (what == MOD_LOAD) { 1318 xpt_init(NULL); 1319 } else if (what == MOD_UNLOAD) { 1320 return EBUSY; 1321 } 1322 1323 return 0; 1324 } 1325 1326 /* Functions accessed by the peripheral drivers */ 1327 static void 1328 xpt_init(void *dummy) 1329 { 1330 struct cam_sim *xpt_sim; 1331 struct cam_path *path; 1332 struct cam_devq *devq; 1333 cam_status status; 1334 1335 TAILQ_INIT(&xpt_busses); 1336 TAILQ_INIT(&cam_bioq); 1337 TAILQ_INIT(&cam_netq); 1338 SLIST_INIT(&ccb_freeq); 1339 STAILQ_INIT(&highpowerq); 1340 1341 /* 1342 * The xpt layer is, itself, the equivelent of a SIM. 1343 * Allow 16 ccbs in the ccb pool for it. This should 1344 * give decent parallelism when we probe busses and 1345 * perform other XPT functions. 1346 */ 1347 devq = cam_simq_alloc(16); 1348 xpt_sim = cam_sim_alloc(xptaction, 1349 xptpoll, 1350 "xpt", 1351 /*softc*/NULL, 1352 /*unit*/0, 1353 /*max_dev_transactions*/0, 1354 /*max_tagged_dev_transactions*/0, 1355 devq); 1356 cam_simq_release(devq); 1357 xpt_max_ccbs = 16; 1358 1359 xpt_bus_register(xpt_sim, /*bus #*/0); 1360 1361 /* 1362 * Looking at the XPT from the SIM layer, the XPT is 1363 * the equivelent of a peripheral driver. Allocate 1364 * a peripheral driver entry for us. 1365 */ 1366 if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, 1367 CAM_TARGET_WILDCARD, 1368 CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { 1369 kprintf("xpt_init: xpt_create_path failed with status %#x," 1370 " failing attach\n", status); 1371 return; 1372 } 1373 1374 cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, 1375 path, NULL, 0, NULL); 1376 xpt_free_path(path); 1377 1378 xpt_sim->softc = xpt_periph; 1379 1380 /* 1381 * Register a callback for when interrupts are enabled. 1382 */ 1383 xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), 1384 M_TEMP, M_INTWAIT | M_ZERO); 1385 xpt_config_hook->ich_func = xpt_config; 1386 xpt_config_hook->ich_desc = "xpt"; 1387 xpt_config_hook->ich_order = 1000; 1388 if (config_intrhook_establish(xpt_config_hook) != 0) { 1389 kfree (xpt_config_hook, M_TEMP); 1390 kprintf("xpt_init: config_intrhook_establish failed " 1391 "- failing attach\n"); 1392 } 1393 1394 /* Install our software interrupt handlers */ 1395 register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet", NULL); 1396 register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL); 1397 } 1398 1399 static cam_status 1400 xptregister(struct cam_periph *periph, void *arg) 1401 { 1402 if (periph == NULL) { 1403 kprintf("xptregister: periph was NULL!!\n"); 1404 return(CAM_REQ_CMP_ERR); 1405 } 1406 1407 periph->softc = NULL; 1408 1409 xpt_periph = periph; 1410 1411 return(CAM_REQ_CMP); 1412 } 1413 1414 int32_t 1415 xpt_add_periph(struct cam_periph *periph) 1416 { 1417 struct cam_ed *device; 1418 int32_t status; 1419 struct periph_list *periph_head; 1420 1421 device = periph->path->device; 1422 1423 periph_head = &device->periphs; 1424 1425 status = CAM_REQ_CMP; 1426 1427 if (device != NULL) { 1428 /* 1429 * Make room for this peripheral 1430 * so it will fit in the queue 1431 * when it's scheduled to run 1432 */ 1433 crit_enter(); 1434 status = camq_resize(&device->drvq, 1435 device->drvq.array_size + 1); 1436 1437 device->generation++; 1438 1439 SLIST_INSERT_HEAD(periph_head, periph, periph_links); 1440 crit_exit(); 1441 } 1442 1443 xsoftc.generation++; 1444 1445 return (status); 1446 } 1447 1448 void 1449 xpt_remove_periph(struct cam_periph *periph) 1450 { 1451 struct cam_ed *device; 1452 1453 device = periph->path->device; 1454 1455 if (device != NULL) { 1456 struct periph_list *periph_head; 1457 1458 periph_head = &device->periphs; 1459 1460 /* Release the slot for this peripheral */ 1461 crit_enter(); 1462 camq_resize(&device->drvq, device->drvq.array_size - 1); 1463 1464 device->generation++; 1465 1466 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); 1467 crit_exit(); 1468 } 1469 1470 xsoftc.generation++; 1471 1472 } 1473 1474 #ifdef CAM_NEW_TRAN_CODE 1475 1476 void 1477 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1478 { 1479 struct ccb_pathinq cpi; 1480 struct ccb_trans_settings cts; 1481 struct cam_path *path; 1482 u_int speed; 1483 u_int freq; 1484 u_int mb; 1485 1486 path = periph->path; 1487 /* 1488 * To ensure that this is printed in one piece, 1489 * mask out CAM interrupts. 1490 */ 1491 crit_enter(); 1492 printf("%s%d at %s%d bus %d target %d lun %d\n", 1493 periph->periph_name, periph->unit_number, 1494 path->bus->sim->sim_name, 1495 path->bus->sim->unit_number, 1496 path->bus->sim->bus_id, 1497 path->target->target_id, 1498 path->device->lun_id); 1499 printf("%s%d: ", periph->periph_name, periph->unit_number); 1500 scsi_print_inquiry(&path->device->inq_data); 1501 if ((bootverbose) 1502 && (path->device->serial_num_len > 0)) { 1503 /* Don't wrap the screen - print only the first 60 chars */ 1504 printf("%s%d: Serial Number %.60s\n", periph->periph_name, 1505 periph->unit_number, path->device->serial_num); 1506 } 1507 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1508 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1509 cts.type = CTS_TYPE_CURRENT_SETTINGS; 1510 xpt_action((union ccb*)&cts); 1511 1512 /* Ask the SIM for its base transfer speed */ 1513 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1514 cpi.ccb_h.func_code = XPT_PATH_INQ; 1515 xpt_action((union ccb *)&cpi); 1516 1517 speed = cpi.base_transfer_speed; 1518 freq = 0; 1519 if (cts.ccb_h.status == CAM_REQ_CMP 1520 && cts.transport == XPORT_SPI) { 1521 struct ccb_trans_settings_spi *spi; 1522 1523 spi = &cts.xport_specific.spi; 1524 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 1525 && spi->sync_offset != 0) { 1526 freq = scsi_calc_syncsrate(spi->sync_period); 1527 speed = freq; 1528 } 1529 1530 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) 1531 speed *= (0x01 << spi->bus_width); 1532 } 1533 1534 mb = speed / 1000; 1535 if (mb > 0) 1536 printf("%s%d: %d.%03dMB/s transfers", 1537 periph->periph_name, periph->unit_number, 1538 mb, speed % 1000); 1539 else 1540 printf("%s%d: %dKB/s transfers", periph->periph_name, 1541 periph->unit_number, speed); 1542 /* Report additional information about SPI connections */ 1543 if (cts.ccb_h.status == CAM_REQ_CMP 1544 && cts.transport == XPORT_SPI) { 1545 struct ccb_trans_settings_spi *spi; 1546 1547 spi = &cts.xport_specific.spi; 1548 if (freq != 0) { 1549 printf(" (%d.%03dMHz%s, offset %d", freq / 1000, 1550 freq % 1000, 1551 (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 1552 ? " DT" : "", 1553 spi->sync_offset); 1554 } 1555 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 1556 && spi->bus_width > 0) { 1557 if (freq != 0) { 1558 printf(", "); 1559 } else { 1560 printf(" ("); 1561 } 1562 printf("%dbit)", 8 * (0x01 << spi->bus_width)); 1563 } else if (freq != 0) { 1564 printf(")"); 1565 } 1566 } 1567 1568 if (path->device->inq_flags & SID_CmdQue 1569 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1570 printf("\n%s%d: Tagged Queueing Enabled", 1571 periph->periph_name, periph->unit_number); 1572 } 1573 printf("\n"); 1574 1575 /* 1576 * We only want to print the caller's announce string if they've 1577 * passed one in.. 1578 */ 1579 if (announce_string != NULL) 1580 printf("%s%d: %s\n", periph->periph_name, 1581 periph->unit_number, announce_string); 1582 crit_exit(); 1583 } 1584 #else /* CAM_NEW_TRAN_CODE */ 1585 void 1586 xpt_announce_periph(struct cam_periph *periph, char *announce_string) 1587 { 1588 u_int mb; 1589 struct cam_path *path; 1590 struct ccb_trans_settings cts; 1591 1592 path = periph->path; 1593 /* 1594 * To ensure that this is printed in one piece, 1595 * mask out CAM interrupts. 1596 */ 1597 crit_enter(); 1598 kprintf("%s%d at %s%d bus %d target %d lun %d\n", 1599 periph->periph_name, periph->unit_number, 1600 path->bus->sim->sim_name, 1601 path->bus->sim->unit_number, 1602 path->bus->sim->bus_id, 1603 path->target->target_id, 1604 path->device->lun_id); 1605 kprintf("%s%d: ", periph->periph_name, periph->unit_number); 1606 scsi_print_inquiry(&path->device->inq_data); 1607 if ((bootverbose) 1608 && (path->device->serial_num_len > 0)) { 1609 /* Don't wrap the screen - print only the first 60 chars */ 1610 kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, 1611 periph->unit_number, path->device->serial_num); 1612 } 1613 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 1614 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 1615 cts.flags = CCB_TRANS_CURRENT_SETTINGS; 1616 xpt_action((union ccb*)&cts); 1617 if (cts.ccb_h.status == CAM_REQ_CMP) { 1618 u_int speed; 1619 u_int freq; 1620 1621 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1622 && cts.sync_offset != 0) { 1623 freq = scsi_calc_syncsrate(cts.sync_period); 1624 speed = freq; 1625 } else { 1626 struct ccb_pathinq cpi; 1627 1628 /* Ask the SIM for its base transfer speed */ 1629 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 1630 cpi.ccb_h.func_code = XPT_PATH_INQ; 1631 xpt_action((union ccb *)&cpi); 1632 1633 speed = cpi.base_transfer_speed; 1634 freq = 0; 1635 } 1636 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) 1637 speed *= (0x01 << cts.bus_width); 1638 mb = speed / 1000; 1639 if (mb > 0) 1640 kprintf("%s%d: %d.%03dMB/s transfers", 1641 periph->periph_name, periph->unit_number, 1642 mb, speed % 1000); 1643 else 1644 kprintf("%s%d: %dKB/s transfers", periph->periph_name, 1645 periph->unit_number, speed); 1646 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1647 && cts.sync_offset != 0) { 1648 kprintf(" (%d.%03dMHz, offset %d", freq / 1000, 1649 freq % 1000, cts.sync_offset); 1650 } 1651 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0 1652 && cts.bus_width > 0) { 1653 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1654 && cts.sync_offset != 0) { 1655 kprintf(", "); 1656 } else { 1657 kprintf(" ("); 1658 } 1659 kprintf("%dbit)", 8 * (0x01 << cts.bus_width)); 1660 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0 1661 && cts.sync_offset != 0) { 1662 kprintf(")"); 1663 } 1664 1665 if (path->device->inq_flags & SID_CmdQue 1666 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1667 kprintf(", Tagged Queueing Enabled"); 1668 } 1669 1670 kprintf("\n"); 1671 } else if (path->device->inq_flags & SID_CmdQue 1672 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { 1673 kprintf("%s%d: Tagged Queueing Enabled\n", 1674 periph->periph_name, periph->unit_number); 1675 } 1676 1677 /* 1678 * We only want to print the caller's announce string if they've 1679 * passed one in.. 1680 */ 1681 if (announce_string != NULL) 1682 kprintf("%s%d: %s\n", periph->periph_name, 1683 periph->unit_number, announce_string); 1684 crit_exit(); 1685 } 1686 1687 #endif /* CAM_NEW_TRAN_CODE */ 1688 1689 static dev_match_ret 1690 xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1691 struct cam_eb *bus) 1692 { 1693 dev_match_ret retval; 1694 int i; 1695 1696 retval = DM_RET_NONE; 1697 1698 /* 1699 * If we aren't given something to match against, that's an error. 1700 */ 1701 if (bus == NULL) 1702 return(DM_RET_ERROR); 1703 1704 /* 1705 * If there are no match entries, then this bus matches no 1706 * matter what. 1707 */ 1708 if ((patterns == NULL) || (num_patterns == 0)) 1709 return(DM_RET_DESCEND | DM_RET_COPY); 1710 1711 for (i = 0; i < num_patterns; i++) { 1712 struct bus_match_pattern *cur_pattern; 1713 1714 /* 1715 * If the pattern in question isn't for a bus node, we 1716 * aren't interested. However, we do indicate to the 1717 * calling routine that we should continue descending the 1718 * tree, since the user wants to match against lower-level 1719 * EDT elements. 1720 */ 1721 if (patterns[i].type != DEV_MATCH_BUS) { 1722 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1723 retval |= DM_RET_DESCEND; 1724 continue; 1725 } 1726 1727 cur_pattern = &patterns[i].pattern.bus_pattern; 1728 1729 /* 1730 * If they want to match any bus node, we give them any 1731 * device node. 1732 */ 1733 if (cur_pattern->flags == BUS_MATCH_ANY) { 1734 /* set the copy flag */ 1735 retval |= DM_RET_COPY; 1736 1737 /* 1738 * If we've already decided on an action, go ahead 1739 * and return. 1740 */ 1741 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1742 return(retval); 1743 } 1744 1745 /* 1746 * Not sure why someone would do this... 1747 */ 1748 if (cur_pattern->flags == BUS_MATCH_NONE) 1749 continue; 1750 1751 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) 1752 && (cur_pattern->path_id != bus->path_id)) 1753 continue; 1754 1755 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) 1756 && (cur_pattern->bus_id != bus->sim->bus_id)) 1757 continue; 1758 1759 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) 1760 && (cur_pattern->unit_number != bus->sim->unit_number)) 1761 continue; 1762 1763 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) 1764 && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, 1765 DEV_IDLEN) != 0)) 1766 continue; 1767 1768 /* 1769 * If we get to this point, the user definitely wants 1770 * information on this bus. So tell the caller to copy the 1771 * data out. 1772 */ 1773 retval |= DM_RET_COPY; 1774 1775 /* 1776 * If the return action has been set to descend, then we 1777 * know that we've already seen a non-bus matching 1778 * expression, therefore we need to further descend the tree. 1779 * This won't change by continuing around the loop, so we 1780 * go ahead and return. If we haven't seen a non-bus 1781 * matching expression, we keep going around the loop until 1782 * we exhaust the matching expressions. We'll set the stop 1783 * flag once we fall out of the loop. 1784 */ 1785 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1786 return(retval); 1787 } 1788 1789 /* 1790 * If the return action hasn't been set to descend yet, that means 1791 * we haven't seen anything other than bus matching patterns. So 1792 * tell the caller to stop descending the tree -- the user doesn't 1793 * want to match against lower level tree elements. 1794 */ 1795 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1796 retval |= DM_RET_STOP; 1797 1798 return(retval); 1799 } 1800 1801 static dev_match_ret 1802 xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, 1803 struct cam_ed *device) 1804 { 1805 dev_match_ret retval; 1806 int i; 1807 1808 retval = DM_RET_NONE; 1809 1810 /* 1811 * If we aren't given something to match against, that's an error. 1812 */ 1813 if (device == NULL) 1814 return(DM_RET_ERROR); 1815 1816 /* 1817 * If there are no match entries, then this device matches no 1818 * matter what. 1819 */ 1820 if ((patterns == NULL) || (patterns == 0)) 1821 return(DM_RET_DESCEND | DM_RET_COPY); 1822 1823 for (i = 0; i < num_patterns; i++) { 1824 struct device_match_pattern *cur_pattern; 1825 1826 /* 1827 * If the pattern in question isn't for a device node, we 1828 * aren't interested. 1829 */ 1830 if (patterns[i].type != DEV_MATCH_DEVICE) { 1831 if ((patterns[i].type == DEV_MATCH_PERIPH) 1832 && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) 1833 retval |= DM_RET_DESCEND; 1834 continue; 1835 } 1836 1837 cur_pattern = &patterns[i].pattern.device_pattern; 1838 1839 /* 1840 * If they want to match any device node, we give them any 1841 * device node. 1842 */ 1843 if (cur_pattern->flags == DEV_MATCH_ANY) { 1844 /* set the copy flag */ 1845 retval |= DM_RET_COPY; 1846 1847 1848 /* 1849 * If we've already decided on an action, go ahead 1850 * and return. 1851 */ 1852 if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) 1853 return(retval); 1854 } 1855 1856 /* 1857 * Not sure why someone would do this... 1858 */ 1859 if (cur_pattern->flags == DEV_MATCH_NONE) 1860 continue; 1861 1862 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) 1863 && (cur_pattern->path_id != device->target->bus->path_id)) 1864 continue; 1865 1866 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) 1867 && (cur_pattern->target_id != device->target->target_id)) 1868 continue; 1869 1870 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) 1871 && (cur_pattern->target_lun != device->lun_id)) 1872 continue; 1873 1874 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) 1875 && (cam_quirkmatch((caddr_t)&device->inq_data, 1876 (caddr_t)&cur_pattern->inq_pat, 1877 1, sizeof(cur_pattern->inq_pat), 1878 scsi_static_inquiry_match) == NULL)) 1879 continue; 1880 1881 /* 1882 * If we get to this point, the user definitely wants 1883 * information on this device. So tell the caller to copy 1884 * the data out. 1885 */ 1886 retval |= DM_RET_COPY; 1887 1888 /* 1889 * If the return action has been set to descend, then we 1890 * know that we've already seen a peripheral matching 1891 * expression, therefore we need to further descend the tree. 1892 * This won't change by continuing around the loop, so we 1893 * go ahead and return. If we haven't seen a peripheral 1894 * matching expression, we keep going around the loop until 1895 * we exhaust the matching expressions. We'll set the stop 1896 * flag once we fall out of the loop. 1897 */ 1898 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) 1899 return(retval); 1900 } 1901 1902 /* 1903 * If the return action hasn't been set to descend yet, that means 1904 * we haven't seen any peripheral matching patterns. So tell the 1905 * caller to stop descending the tree -- the user doesn't want to 1906 * match against lower level tree elements. 1907 */ 1908 if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) 1909 retval |= DM_RET_STOP; 1910 1911 return(retval); 1912 } 1913 1914 /* 1915 * Match a single peripheral against any number of match patterns. 1916 */ 1917 static dev_match_ret 1918 xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, 1919 struct cam_periph *periph) 1920 { 1921 dev_match_ret retval; 1922 int i; 1923 1924 /* 1925 * If we aren't given something to match against, that's an error. 1926 */ 1927 if (periph == NULL) 1928 return(DM_RET_ERROR); 1929 1930 /* 1931 * If there are no match entries, then this peripheral matches no 1932 * matter what. 1933 */ 1934 if ((patterns == NULL) || (num_patterns == 0)) 1935 return(DM_RET_STOP | DM_RET_COPY); 1936 1937 /* 1938 * There aren't any nodes below a peripheral node, so there's no 1939 * reason to descend the tree any further. 1940 */ 1941 retval = DM_RET_STOP; 1942 1943 for (i = 0; i < num_patterns; i++) { 1944 struct periph_match_pattern *cur_pattern; 1945 1946 /* 1947 * If the pattern in question isn't for a peripheral, we 1948 * aren't interested. 1949 */ 1950 if (patterns[i].type != DEV_MATCH_PERIPH) 1951 continue; 1952 1953 cur_pattern = &patterns[i].pattern.periph_pattern; 1954 1955 /* 1956 * If they want to match on anything, then we will do so. 1957 */ 1958 if (cur_pattern->flags == PERIPH_MATCH_ANY) { 1959 /* set the copy flag */ 1960 retval |= DM_RET_COPY; 1961 1962 /* 1963 * We've already set the return action to stop, 1964 * since there are no nodes below peripherals in 1965 * the tree. 1966 */ 1967 return(retval); 1968 } 1969 1970 /* 1971 * Not sure why someone would do this... 1972 */ 1973 if (cur_pattern->flags == PERIPH_MATCH_NONE) 1974 continue; 1975 1976 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) 1977 && (cur_pattern->path_id != periph->path->bus->path_id)) 1978 continue; 1979 1980 /* 1981 * For the target and lun id's, we have to make sure the 1982 * target and lun pointers aren't NULL. The xpt peripheral 1983 * has a wildcard target and device. 1984 */ 1985 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) 1986 && ((periph->path->target == NULL) 1987 ||(cur_pattern->target_id != periph->path->target->target_id))) 1988 continue; 1989 1990 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) 1991 && ((periph->path->device == NULL) 1992 || (cur_pattern->target_lun != periph->path->device->lun_id))) 1993 continue; 1994 1995 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) 1996 && (cur_pattern->unit_number != periph->unit_number)) 1997 continue; 1998 1999 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) 2000 && (strncmp(cur_pattern->periph_name, periph->periph_name, 2001 DEV_IDLEN) != 0)) 2002 continue; 2003 2004 /* 2005 * If we get to this point, the user definitely wants 2006 * information on this peripheral. So tell the caller to 2007 * copy the data out. 2008 */ 2009 retval |= DM_RET_COPY; 2010 2011 /* 2012 * The return action has already been set to stop, since 2013 * peripherals don't have any nodes below them in the EDT. 2014 */ 2015 return(retval); 2016 } 2017 2018 /* 2019 * If we get to this point, the peripheral that was passed in 2020 * doesn't match any of the patterns. 2021 */ 2022 return(retval); 2023 } 2024 2025 static int 2026 xptedtbusfunc(struct cam_eb *bus, void *arg) 2027 { 2028 struct ccb_dev_match *cdm; 2029 dev_match_ret retval; 2030 2031 cdm = (struct ccb_dev_match *)arg; 2032 2033 /* 2034 * If our position is for something deeper in the tree, that means 2035 * that we've already seen this node. So, we keep going down. 2036 */ 2037 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2038 && (cdm->pos.cookie.bus == bus) 2039 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2040 && (cdm->pos.cookie.target != NULL)) 2041 retval = DM_RET_DESCEND; 2042 else 2043 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); 2044 2045 /* 2046 * If we got an error, bail out of the search. 2047 */ 2048 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2049 cdm->status = CAM_DEV_MATCH_ERROR; 2050 return(0); 2051 } 2052 2053 /* 2054 * If the copy flag is set, copy this bus out. 2055 */ 2056 if (retval & DM_RET_COPY) { 2057 int spaceleft, j; 2058 2059 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2060 sizeof(struct dev_match_result)); 2061 2062 /* 2063 * If we don't have enough space to put in another 2064 * match result, save our position and tell the 2065 * user there are more devices to check. 2066 */ 2067 if (spaceleft < sizeof(struct dev_match_result)) { 2068 bzero(&cdm->pos, sizeof(cdm->pos)); 2069 cdm->pos.position_type = 2070 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; 2071 2072 cdm->pos.cookie.bus = bus; 2073 cdm->pos.generations[CAM_BUS_GENERATION]= 2074 bus_generation; 2075 cdm->status = CAM_DEV_MATCH_MORE; 2076 return(0); 2077 } 2078 j = cdm->num_matches; 2079 cdm->num_matches++; 2080 cdm->matches[j].type = DEV_MATCH_BUS; 2081 cdm->matches[j].result.bus_result.path_id = bus->path_id; 2082 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; 2083 cdm->matches[j].result.bus_result.unit_number = 2084 bus->sim->unit_number; 2085 strncpy(cdm->matches[j].result.bus_result.dev_name, 2086 bus->sim->sim_name, DEV_IDLEN); 2087 } 2088 2089 /* 2090 * If the user is only interested in busses, there's no 2091 * reason to descend to the next level in the tree. 2092 */ 2093 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2094 return(1); 2095 2096 /* 2097 * If there is a target generation recorded, check it to 2098 * make sure the target list hasn't changed. 2099 */ 2100 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2101 && (bus == cdm->pos.cookie.bus) 2102 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2103 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) 2104 && (cdm->pos.generations[CAM_TARGET_GENERATION] != 2105 bus->generation)) { 2106 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2107 return(0); 2108 } 2109 2110 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2111 && (cdm->pos.cookie.bus == bus) 2112 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2113 && (cdm->pos.cookie.target != NULL)) 2114 return(xpttargettraverse(bus, 2115 (struct cam_et *)cdm->pos.cookie.target, 2116 xptedttargetfunc, arg)); 2117 else 2118 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); 2119 } 2120 2121 static int 2122 xptedttargetfunc(struct cam_et *target, void *arg) 2123 { 2124 struct ccb_dev_match *cdm; 2125 2126 cdm = (struct ccb_dev_match *)arg; 2127 2128 /* 2129 * If there is a device list generation recorded, check it to 2130 * make sure the device list hasn't changed. 2131 */ 2132 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2133 && (cdm->pos.cookie.bus == target->bus) 2134 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2135 && (cdm->pos.cookie.target == target) 2136 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2137 && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) 2138 && (cdm->pos.generations[CAM_DEV_GENERATION] != 2139 target->generation)) { 2140 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2141 return(0); 2142 } 2143 2144 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2145 && (cdm->pos.cookie.bus == target->bus) 2146 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2147 && (cdm->pos.cookie.target == target) 2148 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2149 && (cdm->pos.cookie.device != NULL)) 2150 return(xptdevicetraverse(target, 2151 (struct cam_ed *)cdm->pos.cookie.device, 2152 xptedtdevicefunc, arg)); 2153 else 2154 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); 2155 } 2156 2157 static int 2158 xptedtdevicefunc(struct cam_ed *device, void *arg) 2159 { 2160 2161 struct ccb_dev_match *cdm; 2162 dev_match_ret retval; 2163 2164 cdm = (struct ccb_dev_match *)arg; 2165 2166 /* 2167 * If our position is for something deeper in the tree, that means 2168 * that we've already seen this node. So, we keep going down. 2169 */ 2170 if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2171 && (cdm->pos.cookie.device == device) 2172 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2173 && (cdm->pos.cookie.periph != NULL)) 2174 retval = DM_RET_DESCEND; 2175 else 2176 retval = xptdevicematch(cdm->patterns, cdm->num_patterns, 2177 device); 2178 2179 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2180 cdm->status = CAM_DEV_MATCH_ERROR; 2181 return(0); 2182 } 2183 2184 /* 2185 * If the copy flag is set, copy this device out. 2186 */ 2187 if (retval & DM_RET_COPY) { 2188 int spaceleft, j; 2189 2190 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2191 sizeof(struct dev_match_result)); 2192 2193 /* 2194 * If we don't have enough space to put in another 2195 * match result, save our position and tell the 2196 * user there are more devices to check. 2197 */ 2198 if (spaceleft < sizeof(struct dev_match_result)) { 2199 bzero(&cdm->pos, sizeof(cdm->pos)); 2200 cdm->pos.position_type = 2201 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2202 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; 2203 2204 cdm->pos.cookie.bus = device->target->bus; 2205 cdm->pos.generations[CAM_BUS_GENERATION]= 2206 bus_generation; 2207 cdm->pos.cookie.target = device->target; 2208 cdm->pos.generations[CAM_TARGET_GENERATION] = 2209 device->target->bus->generation; 2210 cdm->pos.cookie.device = device; 2211 cdm->pos.generations[CAM_DEV_GENERATION] = 2212 device->target->generation; 2213 cdm->status = CAM_DEV_MATCH_MORE; 2214 return(0); 2215 } 2216 j = cdm->num_matches; 2217 cdm->num_matches++; 2218 cdm->matches[j].type = DEV_MATCH_DEVICE; 2219 cdm->matches[j].result.device_result.path_id = 2220 device->target->bus->path_id; 2221 cdm->matches[j].result.device_result.target_id = 2222 device->target->target_id; 2223 cdm->matches[j].result.device_result.target_lun = 2224 device->lun_id; 2225 bcopy(&device->inq_data, 2226 &cdm->matches[j].result.device_result.inq_data, 2227 sizeof(struct scsi_inquiry_data)); 2228 2229 /* Let the user know whether this device is unconfigured */ 2230 if (device->flags & CAM_DEV_UNCONFIGURED) 2231 cdm->matches[j].result.device_result.flags = 2232 DEV_RESULT_UNCONFIGURED; 2233 else 2234 cdm->matches[j].result.device_result.flags = 2235 DEV_RESULT_NOFLAG; 2236 } 2237 2238 /* 2239 * If the user isn't interested in peripherals, don't descend 2240 * the tree any further. 2241 */ 2242 if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) 2243 return(1); 2244 2245 /* 2246 * If there is a peripheral list generation recorded, make sure 2247 * it hasn't changed. 2248 */ 2249 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2250 && (device->target->bus == cdm->pos.cookie.bus) 2251 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2252 && (device->target == cdm->pos.cookie.target) 2253 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2254 && (device == cdm->pos.cookie.device) 2255 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2256 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2257 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2258 device->generation)){ 2259 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2260 return(0); 2261 } 2262 2263 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2264 && (cdm->pos.cookie.bus == device->target->bus) 2265 && (cdm->pos.position_type & CAM_DEV_POS_TARGET) 2266 && (cdm->pos.cookie.target == device->target) 2267 && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) 2268 && (cdm->pos.cookie.device == device) 2269 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2270 && (cdm->pos.cookie.periph != NULL)) 2271 return(xptperiphtraverse(device, 2272 (struct cam_periph *)cdm->pos.cookie.periph, 2273 xptedtperiphfunc, arg)); 2274 else 2275 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); 2276 } 2277 2278 static int 2279 xptedtperiphfunc(struct cam_periph *periph, void *arg) 2280 { 2281 struct ccb_dev_match *cdm; 2282 dev_match_ret retval; 2283 2284 cdm = (struct ccb_dev_match *)arg; 2285 2286 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2287 2288 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2289 cdm->status = CAM_DEV_MATCH_ERROR; 2290 return(0); 2291 } 2292 2293 /* 2294 * If the copy flag is set, copy this peripheral out. 2295 */ 2296 if (retval & DM_RET_COPY) { 2297 int spaceleft, j; 2298 2299 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2300 sizeof(struct dev_match_result)); 2301 2302 /* 2303 * If we don't have enough space to put in another 2304 * match result, save our position and tell the 2305 * user there are more devices to check. 2306 */ 2307 if (spaceleft < sizeof(struct dev_match_result)) { 2308 bzero(&cdm->pos, sizeof(cdm->pos)); 2309 cdm->pos.position_type = 2310 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | 2311 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | 2312 CAM_DEV_POS_PERIPH; 2313 2314 cdm->pos.cookie.bus = periph->path->bus; 2315 cdm->pos.generations[CAM_BUS_GENERATION]= 2316 bus_generation; 2317 cdm->pos.cookie.target = periph->path->target; 2318 cdm->pos.generations[CAM_TARGET_GENERATION] = 2319 periph->path->bus->generation; 2320 cdm->pos.cookie.device = periph->path->device; 2321 cdm->pos.generations[CAM_DEV_GENERATION] = 2322 periph->path->target->generation; 2323 cdm->pos.cookie.periph = periph; 2324 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2325 periph->path->device->generation; 2326 cdm->status = CAM_DEV_MATCH_MORE; 2327 return(0); 2328 } 2329 2330 j = cdm->num_matches; 2331 cdm->num_matches++; 2332 cdm->matches[j].type = DEV_MATCH_PERIPH; 2333 cdm->matches[j].result.periph_result.path_id = 2334 periph->path->bus->path_id; 2335 cdm->matches[j].result.periph_result.target_id = 2336 periph->path->target->target_id; 2337 cdm->matches[j].result.periph_result.target_lun = 2338 periph->path->device->lun_id; 2339 cdm->matches[j].result.periph_result.unit_number = 2340 periph->unit_number; 2341 strncpy(cdm->matches[j].result.periph_result.periph_name, 2342 periph->periph_name, DEV_IDLEN); 2343 } 2344 2345 return(1); 2346 } 2347 2348 static int 2349 xptedtmatch(struct ccb_dev_match *cdm) 2350 { 2351 int ret; 2352 2353 cdm->num_matches = 0; 2354 2355 /* 2356 * Check the bus list generation. If it has changed, the user 2357 * needs to reset everything and start over. 2358 */ 2359 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2360 && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) 2361 && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) { 2362 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2363 return(0); 2364 } 2365 2366 if ((cdm->pos.position_type & CAM_DEV_POS_BUS) 2367 && (cdm->pos.cookie.bus != NULL)) 2368 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, 2369 xptedtbusfunc, cdm); 2370 else 2371 ret = xptbustraverse(NULL, xptedtbusfunc, cdm); 2372 2373 /* 2374 * If we get back 0, that means that we had to stop before fully 2375 * traversing the EDT. It also means that one of the subroutines 2376 * has set the status field to the proper value. If we get back 1, 2377 * we've fully traversed the EDT and copied out any matching entries. 2378 */ 2379 if (ret == 1) 2380 cdm->status = CAM_DEV_MATCH_LAST; 2381 2382 return(ret); 2383 } 2384 2385 static int 2386 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) 2387 { 2388 struct ccb_dev_match *cdm; 2389 2390 cdm = (struct ccb_dev_match *)arg; 2391 2392 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2393 && (cdm->pos.cookie.pdrv == pdrv) 2394 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2395 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) 2396 && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 2397 (*pdrv)->generation)) { 2398 cdm->status = CAM_DEV_MATCH_LIST_CHANGED; 2399 return(0); 2400 } 2401 2402 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2403 && (cdm->pos.cookie.pdrv == pdrv) 2404 && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) 2405 && (cdm->pos.cookie.periph != NULL)) 2406 return(xptpdperiphtraverse(pdrv, 2407 (struct cam_periph *)cdm->pos.cookie.periph, 2408 xptplistperiphfunc, arg)); 2409 else 2410 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); 2411 } 2412 2413 static int 2414 xptplistperiphfunc(struct cam_periph *periph, void *arg) 2415 { 2416 struct ccb_dev_match *cdm; 2417 dev_match_ret retval; 2418 2419 cdm = (struct ccb_dev_match *)arg; 2420 2421 retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); 2422 2423 if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { 2424 cdm->status = CAM_DEV_MATCH_ERROR; 2425 return(0); 2426 } 2427 2428 /* 2429 * If the copy flag is set, copy this peripheral out. 2430 */ 2431 if (retval & DM_RET_COPY) { 2432 int spaceleft, j; 2433 2434 spaceleft = cdm->match_buf_len - (cdm->num_matches * 2435 sizeof(struct dev_match_result)); 2436 2437 /* 2438 * If we don't have enough space to put in another 2439 * match result, save our position and tell the 2440 * user there are more devices to check. 2441 */ 2442 if (spaceleft < sizeof(struct dev_match_result)) { 2443 struct periph_driver **pdrv; 2444 2445 pdrv = NULL; 2446 bzero(&cdm->pos, sizeof(cdm->pos)); 2447 cdm->pos.position_type = 2448 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | 2449 CAM_DEV_POS_PERIPH; 2450 2451 /* 2452 * This may look a bit non-sensical, but it is 2453 * actually quite logical. There are very few 2454 * peripheral drivers, and bloating every peripheral 2455 * structure with a pointer back to its parent 2456 * peripheral driver linker set entry would cost 2457 * more in the long run than doing this quick lookup. 2458 */ 2459 for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { 2460 if (strcmp((*pdrv)->driver_name, 2461 periph->periph_name) == 0) 2462 break; 2463 } 2464 2465 if (*pdrv == NULL) { 2466 cdm->status = CAM_DEV_MATCH_ERROR; 2467 return(0); 2468 } 2469 2470 cdm->pos.cookie.pdrv = pdrv; 2471 /* 2472 * The periph generation slot does double duty, as 2473 * does the periph pointer slot. They are used for 2474 * both edt and pdrv lookups and positioning. 2475 */ 2476 cdm->pos.cookie.periph = periph; 2477 cdm->pos.generations[CAM_PERIPH_GENERATION] = 2478 (*pdrv)->generation; 2479 cdm->status = CAM_DEV_MATCH_MORE; 2480 return(0); 2481 } 2482 2483 j = cdm->num_matches; 2484 cdm->num_matches++; 2485 cdm->matches[j].type = DEV_MATCH_PERIPH; 2486 cdm->matches[j].result.periph_result.path_id = 2487 periph->path->bus->path_id; 2488 2489 /* 2490 * The transport layer peripheral doesn't have a target or 2491 * lun. 2492 */ 2493 if (periph->path->target) 2494 cdm->matches[j].result.periph_result.target_id = 2495 periph->path->target->target_id; 2496 else 2497 cdm->matches[j].result.periph_result.target_id = -1; 2498 2499 if (periph->path->device) 2500 cdm->matches[j].result.periph_result.target_lun = 2501 periph->path->device->lun_id; 2502 else 2503 cdm->matches[j].result.periph_result.target_lun = -1; 2504 2505 cdm->matches[j].result.periph_result.unit_number = 2506 periph->unit_number; 2507 strncpy(cdm->matches[j].result.periph_result.periph_name, 2508 periph->periph_name, DEV_IDLEN); 2509 } 2510 2511 return(1); 2512 } 2513 2514 static int 2515 xptperiphlistmatch(struct ccb_dev_match *cdm) 2516 { 2517 int ret; 2518 2519 cdm->num_matches = 0; 2520 2521 /* 2522 * At this point in the edt traversal function, we check the bus 2523 * list generation to make sure that no busses have been added or 2524 * removed since the user last sent a XPT_DEV_MATCH ccb through. 2525 * For the peripheral driver list traversal function, however, we 2526 * don't have to worry about new peripheral driver types coming or 2527 * going; they're in a linker set, and therefore can't change 2528 * without a recompile. 2529 */ 2530 2531 if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) 2532 && (cdm->pos.cookie.pdrv != NULL)) 2533 ret = xptpdrvtraverse( 2534 (struct periph_driver **)cdm->pos.cookie.pdrv, 2535 xptplistpdrvfunc, cdm); 2536 else 2537 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); 2538 2539 /* 2540 * If we get back 0, that means that we had to stop before fully 2541 * traversing the peripheral driver tree. It also means that one of 2542 * the subroutines has set the status field to the proper value. If 2543 * we get back 1, we've fully traversed the EDT and copied out any 2544 * matching entries. 2545 */ 2546 if (ret == 1) 2547 cdm->status = CAM_DEV_MATCH_LAST; 2548 2549 return(ret); 2550 } 2551 2552 static int 2553 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) 2554 { 2555 struct cam_eb *bus, *next_bus; 2556 int retval; 2557 2558 retval = 1; 2559 2560 for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses)); 2561 bus != NULL; 2562 bus = next_bus) { 2563 next_bus = TAILQ_NEXT(bus, links); 2564 2565 retval = tr_func(bus, arg); 2566 if (retval == 0) 2567 return(retval); 2568 } 2569 2570 return(retval); 2571 } 2572 2573 static int 2574 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, 2575 xpt_targetfunc_t *tr_func, void *arg) 2576 { 2577 struct cam_et *target, *next_target; 2578 int retval; 2579 2580 retval = 1; 2581 for (target = (start_target ? start_target : 2582 TAILQ_FIRST(&bus->et_entries)); 2583 target != NULL; target = next_target) { 2584 2585 next_target = TAILQ_NEXT(target, links); 2586 2587 retval = tr_func(target, arg); 2588 2589 if (retval == 0) 2590 return(retval); 2591 } 2592 2593 return(retval); 2594 } 2595 2596 static int 2597 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, 2598 xpt_devicefunc_t *tr_func, void *arg) 2599 { 2600 struct cam_ed *device, *next_device; 2601 int retval; 2602 2603 retval = 1; 2604 for (device = (start_device ? start_device : 2605 TAILQ_FIRST(&target->ed_entries)); 2606 device != NULL; 2607 device = next_device) { 2608 2609 next_device = TAILQ_NEXT(device, links); 2610 2611 retval = tr_func(device, arg); 2612 2613 if (retval == 0) 2614 return(retval); 2615 } 2616 2617 return(retval); 2618 } 2619 2620 static int 2621 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, 2622 xpt_periphfunc_t *tr_func, void *arg) 2623 { 2624 struct cam_periph *periph, *next_periph; 2625 int retval; 2626 2627 retval = 1; 2628 2629 for (periph = (start_periph ? start_periph : 2630 SLIST_FIRST(&device->periphs)); 2631 periph != NULL; 2632 periph = next_periph) { 2633 2634 next_periph = SLIST_NEXT(periph, periph_links); 2635 2636 retval = tr_func(periph, arg); 2637 if (retval == 0) 2638 return(retval); 2639 } 2640 2641 return(retval); 2642 } 2643 2644 static int 2645 xptpdrvtraverse(struct periph_driver **start_pdrv, 2646 xpt_pdrvfunc_t *tr_func, void *arg) 2647 { 2648 struct periph_driver **pdrv; 2649 int retval; 2650 2651 retval = 1; 2652 2653 /* 2654 * We don't traverse the peripheral driver list like we do the 2655 * other lists, because it is a linker set, and therefore cannot be 2656 * changed during runtime. If the peripheral driver list is ever 2657 * re-done to be something other than a linker set (i.e. it can 2658 * change while the system is running), the list traversal should 2659 * be modified to work like the other traversal functions. 2660 */ 2661 for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); 2662 *pdrv != NULL; pdrv++) { 2663 retval = tr_func(pdrv, arg); 2664 2665 if (retval == 0) 2666 return(retval); 2667 } 2668 2669 return(retval); 2670 } 2671 2672 static int 2673 xptpdperiphtraverse(struct periph_driver **pdrv, 2674 struct cam_periph *start_periph, 2675 xpt_periphfunc_t *tr_func, void *arg) 2676 { 2677 struct cam_periph *periph, *next_periph; 2678 int retval; 2679 2680 retval = 1; 2681 2682 for (periph = (start_periph ? start_periph : 2683 TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; 2684 periph = next_periph) { 2685 2686 next_periph = TAILQ_NEXT(periph, unit_links); 2687 2688 retval = tr_func(periph, arg); 2689 if (retval == 0) 2690 return(retval); 2691 } 2692 return(retval); 2693 } 2694 2695 static int 2696 xptdefbusfunc(struct cam_eb *bus, void *arg) 2697 { 2698 struct xpt_traverse_config *tr_config; 2699 2700 tr_config = (struct xpt_traverse_config *)arg; 2701 2702 if (tr_config->depth == XPT_DEPTH_BUS) { 2703 xpt_busfunc_t *tr_func; 2704 2705 tr_func = (xpt_busfunc_t *)tr_config->tr_func; 2706 2707 return(tr_func(bus, tr_config->tr_arg)); 2708 } else 2709 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); 2710 } 2711 2712 static int 2713 xptdeftargetfunc(struct cam_et *target, void *arg) 2714 { 2715 struct xpt_traverse_config *tr_config; 2716 2717 tr_config = (struct xpt_traverse_config *)arg; 2718 2719 if (tr_config->depth == XPT_DEPTH_TARGET) { 2720 xpt_targetfunc_t *tr_func; 2721 2722 tr_func = (xpt_targetfunc_t *)tr_config->tr_func; 2723 2724 return(tr_func(target, tr_config->tr_arg)); 2725 } else 2726 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); 2727 } 2728 2729 static int 2730 xptdefdevicefunc(struct cam_ed *device, void *arg) 2731 { 2732 struct xpt_traverse_config *tr_config; 2733 2734 tr_config = (struct xpt_traverse_config *)arg; 2735 2736 if (tr_config->depth == XPT_DEPTH_DEVICE) { 2737 xpt_devicefunc_t *tr_func; 2738 2739 tr_func = (xpt_devicefunc_t *)tr_config->tr_func; 2740 2741 return(tr_func(device, tr_config->tr_arg)); 2742 } else 2743 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); 2744 } 2745 2746 static int 2747 xptdefperiphfunc(struct cam_periph *periph, void *arg) 2748 { 2749 struct xpt_traverse_config *tr_config; 2750 xpt_periphfunc_t *tr_func; 2751 2752 tr_config = (struct xpt_traverse_config *)arg; 2753 2754 tr_func = (xpt_periphfunc_t *)tr_config->tr_func; 2755 2756 /* 2757 * Unlike the other default functions, we don't check for depth 2758 * here. The peripheral driver level is the last level in the EDT, 2759 * so if we're here, we should execute the function in question. 2760 */ 2761 return(tr_func(periph, tr_config->tr_arg)); 2762 } 2763 2764 /* 2765 * Execute the given function for every bus in the EDT. 2766 */ 2767 static int 2768 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) 2769 { 2770 struct xpt_traverse_config tr_config; 2771 2772 tr_config.depth = XPT_DEPTH_BUS; 2773 tr_config.tr_func = tr_func; 2774 tr_config.tr_arg = arg; 2775 2776 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2777 } 2778 2779 #ifdef notusedyet 2780 /* 2781 * Execute the given function for every target in the EDT. 2782 */ 2783 static int 2784 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg) 2785 { 2786 struct xpt_traverse_config tr_config; 2787 2788 tr_config.depth = XPT_DEPTH_TARGET; 2789 tr_config.tr_func = tr_func; 2790 tr_config.tr_arg = arg; 2791 2792 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2793 } 2794 #endif /* notusedyet */ 2795 2796 /* 2797 * Execute the given function for every device in the EDT. 2798 */ 2799 static int 2800 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) 2801 { 2802 struct xpt_traverse_config tr_config; 2803 2804 tr_config.depth = XPT_DEPTH_DEVICE; 2805 tr_config.tr_func = tr_func; 2806 tr_config.tr_arg = arg; 2807 2808 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2809 } 2810 2811 #ifdef notusedyet 2812 /* 2813 * Execute the given function for every peripheral in the EDT. 2814 */ 2815 static int 2816 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg) 2817 { 2818 struct xpt_traverse_config tr_config; 2819 2820 tr_config.depth = XPT_DEPTH_PERIPH; 2821 tr_config.tr_func = tr_func; 2822 tr_config.tr_arg = arg; 2823 2824 return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); 2825 } 2826 #endif /* notusedyet */ 2827 2828 static int 2829 xptsetasyncfunc(struct cam_ed *device, void *arg) 2830 { 2831 struct cam_path path; 2832 struct ccb_getdev cgd; 2833 struct async_node *cur_entry; 2834 2835 cur_entry = (struct async_node *)arg; 2836 2837 /* 2838 * Don't report unconfigured devices (Wildcard devs, 2839 * devices only for target mode, device instances 2840 * that have been invalidated but are waiting for 2841 * their last reference count to be released). 2842 */ 2843 if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) 2844 return (1); 2845 2846 xpt_compile_path(&path, 2847 NULL, 2848 device->target->bus->path_id, 2849 device->target->target_id, 2850 device->lun_id); 2851 xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); 2852 cgd.ccb_h.func_code = XPT_GDEV_TYPE; 2853 xpt_action((union ccb *)&cgd); 2854 cur_entry->callback(cur_entry->callback_arg, 2855 AC_FOUND_DEVICE, 2856 &path, &cgd); 2857 xpt_release_path(&path); 2858 2859 return(1); 2860 } 2861 2862 static int 2863 xptsetasyncbusfunc(struct cam_eb *bus, void *arg) 2864 { 2865 struct cam_path path; 2866 struct ccb_pathinq cpi; 2867 struct async_node *cur_entry; 2868 2869 cur_entry = (struct async_node *)arg; 2870 2871 xpt_compile_path(&path, /*periph*/NULL, 2872 bus->sim->path_id, 2873 CAM_TARGET_WILDCARD, 2874 CAM_LUN_WILDCARD); 2875 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 2876 cpi.ccb_h.func_code = XPT_PATH_INQ; 2877 xpt_action((union ccb *)&cpi); 2878 cur_entry->callback(cur_entry->callback_arg, 2879 AC_PATH_REGISTERED, 2880 &path, &cpi); 2881 xpt_release_path(&path); 2882 2883 return(1); 2884 } 2885 2886 void 2887 xpt_action(union ccb *start_ccb) 2888 { 2889 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); 2890 2891 start_ccb->ccb_h.status = CAM_REQ_INPROG; 2892 2893 crit_enter(); 2894 2895 switch (start_ccb->ccb_h.func_code) { 2896 case XPT_SCSI_IO: 2897 { 2898 #ifdef CAM_NEW_TRAN_CODE 2899 struct cam_ed *device; 2900 #endif /* CAM_NEW_TRAN_CODE */ 2901 #ifdef CAMDEBUG 2902 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; 2903 struct cam_path *path; 2904 2905 path = start_ccb->ccb_h.path; 2906 #endif 2907 2908 /* 2909 * For the sake of compatibility with SCSI-1 2910 * devices that may not understand the identify 2911 * message, we include lun information in the 2912 * second byte of all commands. SCSI-1 specifies 2913 * that luns are a 3 bit value and reserves only 3 2914 * bits for lun information in the CDB. Later 2915 * revisions of the SCSI spec allow for more than 8 2916 * luns, but have deprecated lun information in the 2917 * CDB. So, if the lun won't fit, we must omit. 2918 * 2919 * Also be aware that during initial probing for devices, 2920 * the inquiry information is unknown but initialized to 0. 2921 * This means that this code will be exercised while probing 2922 * devices with an ANSI revision greater than 2. 2923 */ 2924 #ifdef CAM_NEW_TRAN_CODE 2925 device = start_ccb->ccb_h.path->device; 2926 if (device->protocol_version <= SCSI_REV_2 2927 #else /* CAM_NEW_TRAN_CODE */ 2928 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2 2929 #endif /* CAM_NEW_TRAN_CODE */ 2930 && start_ccb->ccb_h.target_lun < 8 2931 && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { 2932 2933 start_ccb->csio.cdb_io.cdb_bytes[1] |= 2934 start_ccb->ccb_h.target_lun << 5; 2935 } 2936 start_ccb->csio.scsi_status = SCSI_STATUS_OK; 2937 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", 2938 scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], 2939 &path->device->inq_data), 2940 scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, 2941 cdb_str, sizeof(cdb_str)))); 2942 /* FALLTHROUGH */ 2943 } 2944 case XPT_TARGET_IO: 2945 case XPT_CONT_TARGET_IO: 2946 start_ccb->csio.sense_resid = 0; 2947 start_ccb->csio.resid = 0; 2948 /* FALLTHROUGH */ 2949 case XPT_RESET_DEV: 2950 case XPT_ENG_EXEC: 2951 { 2952 struct cam_path *path; 2953 int runq; 2954 2955 path = start_ccb->ccb_h.path; 2956 2957 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); 2958 if (path->device->qfrozen_cnt == 0) 2959 runq = xpt_schedule_dev_sendq(path->bus, path->device); 2960 else 2961 runq = 0; 2962 if (runq != 0) 2963 xpt_run_dev_sendq(path->bus); 2964 break; 2965 } 2966 case XPT_SET_TRAN_SETTINGS: 2967 { 2968 xpt_set_transfer_settings(&start_ccb->cts, 2969 start_ccb->ccb_h.path->device, 2970 /*async_update*/FALSE); 2971 break; 2972 } 2973 case XPT_CALC_GEOMETRY: 2974 { 2975 struct cam_sim *sim; 2976 2977 /* Filter out garbage */ 2978 if (start_ccb->ccg.block_size == 0 2979 || start_ccb->ccg.volume_size == 0) { 2980 start_ccb->ccg.cylinders = 0; 2981 start_ccb->ccg.heads = 0; 2982 start_ccb->ccg.secs_per_track = 0; 2983 start_ccb->ccb_h.status = CAM_REQ_CMP; 2984 break; 2985 } 2986 sim = start_ccb->ccb_h.path->bus->sim; 2987 (*(sim->sim_action))(sim, start_ccb); 2988 break; 2989 } 2990 case XPT_ABORT: 2991 { 2992 union ccb* abort_ccb; 2993 2994 abort_ccb = start_ccb->cab.abort_ccb; 2995 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { 2996 2997 if (abort_ccb->ccb_h.pinfo.index >= 0) { 2998 struct cam_ccbq *ccbq; 2999 3000 ccbq = &abort_ccb->ccb_h.path->device->ccbq; 3001 cam_ccbq_remove_ccb(ccbq, abort_ccb); 3002 abort_ccb->ccb_h.status = 3003 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3004 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3005 xpt_done(abort_ccb); 3006 start_ccb->ccb_h.status = CAM_REQ_CMP; 3007 break; 3008 } 3009 if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX 3010 && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { 3011 /* 3012 * We've caught this ccb en route to 3013 * the SIM. Flag it for abort and the 3014 * SIM will do so just before starting 3015 * real work on the CCB. 3016 */ 3017 abort_ccb->ccb_h.status = 3018 CAM_REQ_ABORTED|CAM_DEV_QFRZN; 3019 xpt_freeze_devq(abort_ccb->ccb_h.path, 1); 3020 start_ccb->ccb_h.status = CAM_REQ_CMP; 3021 break; 3022 } 3023 } 3024 if (XPT_FC_IS_QUEUED(abort_ccb) 3025 && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { 3026 /* 3027 * It's already completed but waiting 3028 * for our SWI to get to it. 3029 */ 3030 start_ccb->ccb_h.status = CAM_UA_ABORT; 3031 break; 3032 } 3033 /* 3034 * If we weren't able to take care of the abort request 3035 * in the XPT, pass the request down to the SIM for processing. 3036 */ 3037 /* FALLTHROUGH */ 3038 } 3039 case XPT_ACCEPT_TARGET_IO: 3040 case XPT_EN_LUN: 3041 case XPT_IMMED_NOTIFY: 3042 case XPT_NOTIFY_ACK: 3043 case XPT_GET_TRAN_SETTINGS: 3044 case XPT_RESET_BUS: 3045 { 3046 struct cam_sim *sim; 3047 3048 sim = start_ccb->ccb_h.path->bus->sim; 3049 (*(sim->sim_action))(sim, start_ccb); 3050 break; 3051 } 3052 case XPT_PATH_INQ: 3053 { 3054 struct cam_sim *sim; 3055 3056 sim = start_ccb->ccb_h.path->bus->sim; 3057 (*(sim->sim_action))(sim, start_ccb); 3058 break; 3059 } 3060 case XPT_PATH_STATS: 3061 start_ccb->cpis.last_reset = 3062 start_ccb->ccb_h.path->bus->last_reset; 3063 start_ccb->ccb_h.status = CAM_REQ_CMP; 3064 break; 3065 case XPT_GDEV_TYPE: 3066 { 3067 struct cam_ed *dev; 3068 3069 dev = start_ccb->ccb_h.path->device; 3070 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3071 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3072 } else { 3073 struct ccb_getdev *cgd; 3074 struct cam_eb *bus; 3075 struct cam_et *tar; 3076 3077 cgd = &start_ccb->cgd; 3078 bus = cgd->ccb_h.path->bus; 3079 tar = cgd->ccb_h.path->target; 3080 cgd->inq_data = dev->inq_data; 3081 cgd->ccb_h.status = CAM_REQ_CMP; 3082 cgd->serial_num_len = dev->serial_num_len; 3083 if ((dev->serial_num_len > 0) 3084 && (dev->serial_num != NULL)) 3085 bcopy(dev->serial_num, cgd->serial_num, 3086 dev->serial_num_len); 3087 } 3088 break; 3089 } 3090 case XPT_GDEV_STATS: 3091 { 3092 struct cam_ed *dev; 3093 3094 dev = start_ccb->ccb_h.path->device; 3095 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { 3096 start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; 3097 } else { 3098 struct ccb_getdevstats *cgds; 3099 struct cam_eb *bus; 3100 struct cam_et *tar; 3101 3102 cgds = &start_ccb->cgds; 3103 bus = cgds->ccb_h.path->bus; 3104 tar = cgds->ccb_h.path->target; 3105 cgds->dev_openings = dev->ccbq.dev_openings; 3106 cgds->dev_active = dev->ccbq.dev_active; 3107 cgds->devq_openings = dev->ccbq.devq_openings; 3108 cgds->devq_queued = dev->ccbq.queue.entries; 3109 cgds->held = dev->ccbq.held; 3110 cgds->last_reset = tar->last_reset; 3111 cgds->maxtags = dev->quirk->maxtags; 3112 cgds->mintags = dev->quirk->mintags; 3113 if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) 3114 cgds->last_reset = bus->last_reset; 3115 cgds->ccb_h.status = CAM_REQ_CMP; 3116 } 3117 break; 3118 } 3119 case XPT_GDEVLIST: 3120 { 3121 struct cam_periph *nperiph; 3122 struct periph_list *periph_head; 3123 struct ccb_getdevlist *cgdl; 3124 u_int i; 3125 struct cam_ed *device; 3126 int found; 3127 3128 3129 found = 0; 3130 3131 /* 3132 * Don't want anyone mucking with our data. 3133 */ 3134 device = start_ccb->ccb_h.path->device; 3135 periph_head = &device->periphs; 3136 cgdl = &start_ccb->cgdl; 3137 3138 /* 3139 * Check and see if the list has changed since the user 3140 * last requested a list member. If so, tell them that the 3141 * list has changed, and therefore they need to start over 3142 * from the beginning. 3143 */ 3144 if ((cgdl->index != 0) && 3145 (cgdl->generation != device->generation)) { 3146 cgdl->status = CAM_GDEVLIST_LIST_CHANGED; 3147 break; 3148 } 3149 3150 /* 3151 * Traverse the list of peripherals and attempt to find 3152 * the requested peripheral. 3153 */ 3154 for (nperiph = SLIST_FIRST(periph_head), i = 0; 3155 (nperiph != NULL) && (i <= cgdl->index); 3156 nperiph = SLIST_NEXT(nperiph, periph_links), i++) { 3157 if (i == cgdl->index) { 3158 strncpy(cgdl->periph_name, 3159 nperiph->periph_name, 3160 DEV_IDLEN); 3161 cgdl->unit_number = nperiph->unit_number; 3162 found = 1; 3163 } 3164 } 3165 if (found == 0) { 3166 cgdl->status = CAM_GDEVLIST_ERROR; 3167 break; 3168 } 3169 3170 if (nperiph == NULL) 3171 cgdl->status = CAM_GDEVLIST_LAST_DEVICE; 3172 else 3173 cgdl->status = CAM_GDEVLIST_MORE_DEVS; 3174 3175 cgdl->index++; 3176 cgdl->generation = device->generation; 3177 3178 cgdl->ccb_h.status = CAM_REQ_CMP; 3179 break; 3180 } 3181 case XPT_DEV_MATCH: 3182 { 3183 dev_pos_type position_type; 3184 struct ccb_dev_match *cdm; 3185 int ret; 3186 3187 cdm = &start_ccb->cdm; 3188 3189 /* 3190 * Prevent EDT changes while we traverse it. 3191 */ 3192 /* 3193 * There are two ways of getting at information in the EDT. 3194 * The first way is via the primary EDT tree. It starts 3195 * with a list of busses, then a list of targets on a bus, 3196 * then devices/luns on a target, and then peripherals on a 3197 * device/lun. The "other" way is by the peripheral driver 3198 * lists. The peripheral driver lists are organized by 3199 * peripheral driver. (obviously) So it makes sense to 3200 * use the peripheral driver list if the user is looking 3201 * for something like "da1", or all "da" devices. If the 3202 * user is looking for something on a particular bus/target 3203 * or lun, it's generally better to go through the EDT tree. 3204 */ 3205 3206 if (cdm->pos.position_type != CAM_DEV_POS_NONE) 3207 position_type = cdm->pos.position_type; 3208 else { 3209 u_int i; 3210 3211 position_type = CAM_DEV_POS_NONE; 3212 3213 for (i = 0; i < cdm->num_patterns; i++) { 3214 if ((cdm->patterns[i].type == DEV_MATCH_BUS) 3215 ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ 3216 position_type = CAM_DEV_POS_EDT; 3217 break; 3218 } 3219 } 3220 3221 if (cdm->num_patterns == 0) 3222 position_type = CAM_DEV_POS_EDT; 3223 else if (position_type == CAM_DEV_POS_NONE) 3224 position_type = CAM_DEV_POS_PDRV; 3225 } 3226 3227 switch(position_type & CAM_DEV_POS_TYPEMASK) { 3228 case CAM_DEV_POS_EDT: 3229 ret = xptedtmatch(cdm); 3230 break; 3231 case CAM_DEV_POS_PDRV: 3232 ret = xptperiphlistmatch(cdm); 3233 break; 3234 default: 3235 cdm->status = CAM_DEV_MATCH_ERROR; 3236 break; 3237 } 3238 3239 if (cdm->status == CAM_DEV_MATCH_ERROR) 3240 start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; 3241 else 3242 start_ccb->ccb_h.status = CAM_REQ_CMP; 3243 3244 break; 3245 } 3246 case XPT_SASYNC_CB: 3247 { 3248 struct ccb_setasync *csa; 3249 struct async_node *cur_entry; 3250 struct async_list *async_head; 3251 u_int32_t added; 3252 3253 csa = &start_ccb->csa; 3254 added = csa->event_enable; 3255 async_head = &csa->ccb_h.path->device->asyncs; 3256 3257 /* 3258 * If there is already an entry for us, simply 3259 * update it. 3260 */ 3261 cur_entry = SLIST_FIRST(async_head); 3262 while (cur_entry != NULL) { 3263 if ((cur_entry->callback_arg == csa->callback_arg) 3264 && (cur_entry->callback == csa->callback)) 3265 break; 3266 cur_entry = SLIST_NEXT(cur_entry, links); 3267 } 3268 3269 if (cur_entry != NULL) { 3270 /* 3271 * If the request has no flags set, 3272 * remove the entry. 3273 */ 3274 added &= ~cur_entry->event_enable; 3275 if (csa->event_enable == 0) { 3276 SLIST_REMOVE(async_head, cur_entry, 3277 async_node, links); 3278 csa->ccb_h.path->device->refcount--; 3279 kfree(cur_entry, M_DEVBUF); 3280 } else { 3281 cur_entry->event_enable = csa->event_enable; 3282 } 3283 } else { 3284 cur_entry = kmalloc(sizeof(*cur_entry), 3285 M_DEVBUF, M_INTWAIT); 3286 cur_entry->event_enable = csa->event_enable; 3287 cur_entry->callback_arg = csa->callback_arg; 3288 cur_entry->callback = csa->callback; 3289 SLIST_INSERT_HEAD(async_head, cur_entry, links); 3290 csa->ccb_h.path->device->refcount++; 3291 } 3292 3293 if ((added & AC_FOUND_DEVICE) != 0) { 3294 /* 3295 * Get this peripheral up to date with all 3296 * the currently existing devices. 3297 */ 3298 xpt_for_all_devices(xptsetasyncfunc, cur_entry); 3299 } 3300 if ((added & AC_PATH_REGISTERED) != 0) { 3301 /* 3302 * Get this peripheral up to date with all 3303 * the currently existing busses. 3304 */ 3305 xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); 3306 } 3307 start_ccb->ccb_h.status = CAM_REQ_CMP; 3308 break; 3309 } 3310 case XPT_REL_SIMQ: 3311 { 3312 struct ccb_relsim *crs; 3313 struct cam_ed *dev; 3314 3315 crs = &start_ccb->crs; 3316 dev = crs->ccb_h.path->device; 3317 if (dev == NULL) { 3318 3319 crs->ccb_h.status = CAM_DEV_NOT_THERE; 3320 break; 3321 } 3322 3323 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { 3324 3325 if ((dev->inq_data.flags & SID_CmdQue) != 0) { 3326 3327 /* Don't ever go below one opening */ 3328 if (crs->openings > 0) { 3329 xpt_dev_ccbq_resize(crs->ccb_h.path, 3330 crs->openings); 3331 3332 if (bootverbose) { 3333 xpt_print_path(crs->ccb_h.path); 3334 kprintf("tagged openings " 3335 "now %d\n", 3336 crs->openings); 3337 } 3338 } 3339 } 3340 } 3341 3342 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { 3343 3344 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 3345 3346 /* 3347 * Just extend the old timeout and decrement 3348 * the freeze count so that a single timeout 3349 * is sufficient for releasing the queue. 3350 */ 3351 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3352 callout_stop(&dev->c_handle); 3353 } else { 3354 3355 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3356 } 3357 3358 callout_reset(&dev->c_handle, 3359 (crs->release_timeout * hz) / 1000, 3360 xpt_release_devq_timeout, dev); 3361 3362 dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; 3363 3364 } 3365 3366 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { 3367 3368 if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { 3369 /* 3370 * Decrement the freeze count so that a single 3371 * completion is still sufficient to unfreeze 3372 * the queue. 3373 */ 3374 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3375 } else { 3376 3377 dev->flags |= CAM_DEV_REL_ON_COMPLETE; 3378 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3379 } 3380 } 3381 3382 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { 3383 3384 if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 3385 || (dev->ccbq.dev_active == 0)) { 3386 3387 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; 3388 } else { 3389 3390 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; 3391 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; 3392 } 3393 } 3394 3395 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { 3396 3397 xpt_release_devq(crs->ccb_h.path, /*count*/1, 3398 /*run_queue*/TRUE); 3399 } 3400 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; 3401 start_ccb->ccb_h.status = CAM_REQ_CMP; 3402 break; 3403 } 3404 case XPT_SCAN_BUS: 3405 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); 3406 break; 3407 case XPT_SCAN_LUN: 3408 xpt_scan_lun(start_ccb->ccb_h.path->periph, 3409 start_ccb->ccb_h.path, start_ccb->crcn.flags, 3410 start_ccb); 3411 break; 3412 case XPT_DEBUG: { 3413 #ifdef CAMDEBUG 3414 #ifdef CAM_DEBUG_DELAY 3415 cam_debug_delay = CAM_DEBUG_DELAY; 3416 #endif 3417 cam_dflags = start_ccb->cdbg.flags; 3418 if (cam_dpath != NULL) { 3419 xpt_free_path(cam_dpath); 3420 cam_dpath = NULL; 3421 } 3422 3423 if (cam_dflags != CAM_DEBUG_NONE) { 3424 if (xpt_create_path(&cam_dpath, xpt_periph, 3425 start_ccb->ccb_h.path_id, 3426 start_ccb->ccb_h.target_id, 3427 start_ccb->ccb_h.target_lun) != 3428 CAM_REQ_CMP) { 3429 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3430 cam_dflags = CAM_DEBUG_NONE; 3431 } else { 3432 start_ccb->ccb_h.status = CAM_REQ_CMP; 3433 xpt_print_path(cam_dpath); 3434 kprintf("debugging flags now %x\n", cam_dflags); 3435 } 3436 } else { 3437 cam_dpath = NULL; 3438 start_ccb->ccb_h.status = CAM_REQ_CMP; 3439 } 3440 #else /* !CAMDEBUG */ 3441 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 3442 #endif /* CAMDEBUG */ 3443 break; 3444 } 3445 case XPT_NOOP: 3446 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) 3447 xpt_freeze_devq(start_ccb->ccb_h.path, 1); 3448 start_ccb->ccb_h.status = CAM_REQ_CMP; 3449 break; 3450 default: 3451 case XPT_SDEV_TYPE: 3452 case XPT_TERM_IO: 3453 case XPT_ENG_INQ: 3454 /* XXX Implement */ 3455 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; 3456 break; 3457 } 3458 crit_exit(); 3459 } 3460 3461 void 3462 xpt_polled_action(union ccb *start_ccb) 3463 { 3464 u_int32_t timeout; 3465 struct cam_sim *sim; 3466 struct cam_devq *devq; 3467 struct cam_ed *dev; 3468 3469 timeout = start_ccb->ccb_h.timeout; 3470 sim = start_ccb->ccb_h.path->bus->sim; 3471 devq = sim->devq; 3472 dev = start_ccb->ccb_h.path->device; 3473 3474 crit_enter(); 3475 3476 /* 3477 * Steal an opening so that no other queued requests 3478 * can get it before us while we simulate interrupts. 3479 */ 3480 dev->ccbq.devq_openings--; 3481 dev->ccbq.dev_openings--; 3482 3483 while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) 3484 && (--timeout > 0)) { 3485 DELAY(1000); 3486 (*(sim->sim_poll))(sim); 3487 swi_camnet(NULL, NULL); 3488 swi_cambio(NULL, NULL); 3489 } 3490 3491 dev->ccbq.devq_openings++; 3492 dev->ccbq.dev_openings++; 3493 3494 if (timeout != 0) { 3495 xpt_action(start_ccb); 3496 while(--timeout > 0) { 3497 (*(sim->sim_poll))(sim); 3498 swi_camnet(NULL, NULL); 3499 swi_cambio(NULL, NULL); 3500 if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) 3501 != CAM_REQ_INPROG) 3502 break; 3503 DELAY(1000); 3504 } 3505 if (timeout == 0) { 3506 /* 3507 * XXX Is it worth adding a sim_timeout entry 3508 * point so we can attempt recovery? If 3509 * this is only used for dumps, I don't think 3510 * it is. 3511 */ 3512 start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; 3513 } 3514 } else { 3515 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; 3516 } 3517 crit_exit(); 3518 } 3519 3520 /* 3521 * Schedule a peripheral driver to receive a ccb when it's 3522 * target device has space for more transactions. 3523 */ 3524 void 3525 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) 3526 { 3527 struct cam_ed *device; 3528 int runq; 3529 3530 CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); 3531 device = perph->path->device; 3532 crit_enter(); 3533 if (periph_is_queued(perph)) { 3534 /* Simply reorder based on new priority */ 3535 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3536 (" change priority to %d\n", new_priority)); 3537 if (new_priority < perph->pinfo.priority) { 3538 camq_change_priority(&device->drvq, 3539 perph->pinfo.index, 3540 new_priority); 3541 } 3542 runq = 0; 3543 } else { 3544 /* New entry on the queue */ 3545 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3546 (" added periph to queue\n")); 3547 perph->pinfo.priority = new_priority; 3548 perph->pinfo.generation = ++device->drvq.generation; 3549 camq_insert(&device->drvq, &perph->pinfo); 3550 runq = xpt_schedule_dev_allocq(perph->path->bus, device); 3551 } 3552 crit_exit(); 3553 if (runq != 0) { 3554 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, 3555 (" calling xpt_run_devq\n")); 3556 xpt_run_dev_allocq(perph->path->bus); 3557 } 3558 } 3559 3560 3561 /* 3562 * Schedule a device to run on a given queue. 3563 * If the device was inserted as a new entry on the queue, 3564 * return 1 meaning the device queue should be run. If we 3565 * were already queued, implying someone else has already 3566 * started the queue, return 0 so the caller doesn't attempt 3567 * to run the queue. Must be run in a critical section. 3568 */ 3569 static int 3570 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, 3571 u_int32_t new_priority) 3572 { 3573 int retval; 3574 u_int32_t old_priority; 3575 3576 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); 3577 3578 old_priority = pinfo->priority; 3579 3580 /* 3581 * Are we already queued? 3582 */ 3583 if (pinfo->index != CAM_UNQUEUED_INDEX) { 3584 /* Simply reorder based on new priority */ 3585 if (new_priority < old_priority) { 3586 camq_change_priority(queue, pinfo->index, 3587 new_priority); 3588 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3589 ("changed priority to %d\n", 3590 new_priority)); 3591 } 3592 retval = 0; 3593 } else { 3594 /* New entry on the queue */ 3595 if (new_priority < old_priority) 3596 pinfo->priority = new_priority; 3597 3598 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3599 ("Inserting onto queue\n")); 3600 pinfo->generation = ++queue->generation; 3601 camq_insert(queue, pinfo); 3602 retval = 1; 3603 } 3604 return (retval); 3605 } 3606 3607 static void 3608 xpt_run_dev_allocq(struct cam_eb *bus) 3609 { 3610 struct cam_devq *devq; 3611 3612 if ((devq = bus->sim->devq) == NULL) { 3613 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); 3614 return; 3615 } 3616 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); 3617 3618 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3619 (" qfrozen_cnt == 0x%x, entries == %d, " 3620 "openings == %d, active == %d\n", 3621 devq->alloc_queue.qfrozen_cnt, 3622 devq->alloc_queue.entries, 3623 devq->alloc_openings, 3624 devq->alloc_active)); 3625 3626 crit_enter(); 3627 devq->alloc_queue.qfrozen_cnt++; 3628 while ((devq->alloc_queue.entries > 0) 3629 && (devq->alloc_openings > 0) 3630 && (devq->alloc_queue.qfrozen_cnt <= 1)) { 3631 struct cam_ed_qinfo *qinfo; 3632 struct cam_ed *device; 3633 union ccb *work_ccb; 3634 struct cam_periph *drv; 3635 struct camq *drvq; 3636 3637 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, 3638 CAMQ_HEAD); 3639 device = qinfo->device; 3640 3641 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3642 ("running device %p\n", device)); 3643 3644 drvq = &device->drvq; 3645 3646 #ifdef CAMDEBUG 3647 if (drvq->entries <= 0) { 3648 panic("xpt_run_dev_allocq: " 3649 "Device on queue without any work to do"); 3650 } 3651 #endif 3652 if ((work_ccb = xpt_get_ccb(device)) != NULL) { 3653 devq->alloc_openings--; 3654 devq->alloc_active++; 3655 drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); 3656 crit_exit(); 3657 xpt_setup_ccb(&work_ccb->ccb_h, drv->path, 3658 drv->pinfo.priority); 3659 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3660 ("calling periph start\n")); 3661 drv->periph_start(drv, work_ccb); 3662 } else { 3663 /* 3664 * Malloc failure in alloc_ccb 3665 */ 3666 /* 3667 * XXX add us to a list to be run from free_ccb 3668 * if we don't have any ccbs active on this 3669 * device queue otherwise we may never get run 3670 * again. 3671 */ 3672 break; 3673 } 3674 3675 /* Raise IPL for possible insertion and test at top of loop */ 3676 crit_enter(); 3677 3678 if (drvq->entries > 0) { 3679 /* We have more work. Attempt to reschedule */ 3680 xpt_schedule_dev_allocq(bus, device); 3681 } 3682 } 3683 devq->alloc_queue.qfrozen_cnt--; 3684 crit_exit(); 3685 } 3686 3687 static void 3688 xpt_run_dev_sendq(struct cam_eb *bus) 3689 { 3690 struct cam_devq *devq; 3691 3692 if ((devq = bus->sim->devq) == NULL) { 3693 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); 3694 return; 3695 } 3696 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); 3697 3698 crit_enter(); 3699 devq->send_queue.qfrozen_cnt++; 3700 while ((devq->send_queue.entries > 0) 3701 && (devq->send_openings > 0)) { 3702 struct cam_ed_qinfo *qinfo; 3703 struct cam_ed *device; 3704 union ccb *work_ccb; 3705 struct cam_sim *sim; 3706 3707 if (devq->send_queue.qfrozen_cnt > 1) { 3708 break; 3709 } 3710 3711 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, 3712 CAMQ_HEAD); 3713 device = qinfo->device; 3714 3715 /* 3716 * If the device has been "frozen", don't attempt 3717 * to run it. 3718 */ 3719 if (device->qfrozen_cnt > 0) { 3720 continue; 3721 } 3722 3723 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, 3724 ("running device %p\n", device)); 3725 3726 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); 3727 if (work_ccb == NULL) { 3728 kprintf("device on run queue with no ccbs???\n"); 3729 continue; 3730 } 3731 3732 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { 3733 3734 if (num_highpower <= 0) { 3735 /* 3736 * We got a high power command, but we 3737 * don't have any available slots. Freeze 3738 * the device queue until we have a slot 3739 * available. 3740 */ 3741 device->qfrozen_cnt++; 3742 STAILQ_INSERT_TAIL(&highpowerq, 3743 &work_ccb->ccb_h, 3744 xpt_links.stqe); 3745 3746 continue; 3747 } else { 3748 /* 3749 * Consume a high power slot while 3750 * this ccb runs. 3751 */ 3752 num_highpower--; 3753 } 3754 } 3755 devq->active_dev = device; 3756 cam_ccbq_remove_ccb(&device->ccbq, work_ccb); 3757 3758 cam_ccbq_send_ccb(&device->ccbq, work_ccb); 3759 3760 devq->send_openings--; 3761 devq->send_active++; 3762 3763 if (device->ccbq.queue.entries > 0) 3764 xpt_schedule_dev_sendq(bus, device); 3765 3766 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ 3767 /* 3768 * The client wants to freeze the queue 3769 * after this CCB is sent. 3770 */ 3771 device->qfrozen_cnt++; 3772 } 3773 3774 /* In Target mode, the peripheral driver knows best... */ 3775 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { 3776 if ((device->inq_flags & SID_CmdQue) != 0 3777 && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) 3778 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; 3779 else 3780 /* 3781 * Clear this in case of a retried CCB that 3782 * failed due to a rejected tag. 3783 */ 3784 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; 3785 } 3786 3787 /* 3788 * Device queues can be shared among multiple sim instances 3789 * that reside on different busses. Use the SIM in the queue 3790 * CCB's path, rather than the one in the bus that was passed 3791 * into this function. 3792 */ 3793 sim = work_ccb->ccb_h.path->bus->sim; 3794 (*(sim->sim_action))(sim, work_ccb); 3795 3796 devq->active_dev = NULL; 3797 /* Raise IPL for possible insertion and test at top of loop */ 3798 } 3799 devq->send_queue.qfrozen_cnt--; 3800 crit_exit(); 3801 } 3802 3803 /* 3804 * This function merges stuff from the slave ccb into the master ccb, while 3805 * keeping important fields in the master ccb constant. 3806 */ 3807 void 3808 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) 3809 { 3810 /* 3811 * Pull fields that are valid for peripheral drivers to set 3812 * into the master CCB along with the CCB "payload". 3813 */ 3814 master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; 3815 master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; 3816 master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; 3817 master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; 3818 bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], 3819 sizeof(union ccb) - sizeof(struct ccb_hdr)); 3820 } 3821 3822 void 3823 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) 3824 { 3825 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); 3826 callout_init(&ccb_h->timeout_ch); 3827 ccb_h->pinfo.priority = priority; 3828 ccb_h->path = path; 3829 ccb_h->path_id = path->bus->path_id; 3830 if (path->target) 3831 ccb_h->target_id = path->target->target_id; 3832 else 3833 ccb_h->target_id = CAM_TARGET_WILDCARD; 3834 if (path->device) { 3835 ccb_h->target_lun = path->device->lun_id; 3836 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; 3837 } else { 3838 ccb_h->target_lun = CAM_TARGET_WILDCARD; 3839 } 3840 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 3841 ccb_h->flags = 0; 3842 } 3843 3844 /* Path manipulation functions */ 3845 cam_status 3846 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, 3847 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3848 { 3849 struct cam_path *path; 3850 cam_status status; 3851 3852 path = kmalloc(sizeof(*path), M_DEVBUF, M_INTWAIT); 3853 status = xpt_compile_path(path, perph, path_id, target_id, lun_id); 3854 if (status != CAM_REQ_CMP) { 3855 kfree(path, M_DEVBUF); 3856 path = NULL; 3857 } 3858 *new_path_ptr = path; 3859 return (status); 3860 } 3861 3862 static cam_status 3863 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, 3864 path_id_t path_id, target_id_t target_id, lun_id_t lun_id) 3865 { 3866 struct cam_eb *bus; 3867 struct cam_et *target; 3868 struct cam_ed *device; 3869 cam_status status; 3870 3871 status = CAM_REQ_CMP; /* Completed without error */ 3872 target = NULL; /* Wildcarded */ 3873 device = NULL; /* Wildcarded */ 3874 3875 /* 3876 * We will potentially modify the EDT, so block interrupts 3877 * that may attempt to create cam paths. 3878 */ 3879 crit_enter(); 3880 bus = xpt_find_bus(path_id); 3881 if (bus == NULL) { 3882 status = CAM_PATH_INVALID; 3883 } else { 3884 target = xpt_find_target(bus, target_id); 3885 if (target == NULL) { 3886 /* Create one */ 3887 struct cam_et *new_target; 3888 3889 new_target = xpt_alloc_target(bus, target_id); 3890 if (new_target == NULL) { 3891 status = CAM_RESRC_UNAVAIL; 3892 } else { 3893 target = new_target; 3894 } 3895 } 3896 if (target != NULL) { 3897 device = xpt_find_device(target, lun_id); 3898 if (device == NULL) { 3899 /* Create one */ 3900 struct cam_ed *new_device; 3901 3902 new_device = xpt_alloc_device(bus, 3903 target, 3904 lun_id); 3905 if (new_device == NULL) { 3906 status = CAM_RESRC_UNAVAIL; 3907 } else { 3908 device = new_device; 3909 } 3910 } 3911 } 3912 } 3913 crit_exit(); 3914 3915 /* 3916 * Only touch the user's data if we are successful. 3917 */ 3918 if (status == CAM_REQ_CMP) { 3919 new_path->periph = perph; 3920 new_path->bus = bus; 3921 new_path->target = target; 3922 new_path->device = device; 3923 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); 3924 } else { 3925 if (device != NULL) 3926 xpt_release_device(bus, target, device); 3927 if (target != NULL) 3928 xpt_release_target(bus, target); 3929 if (bus != NULL) 3930 xpt_release_bus(bus); 3931 } 3932 return (status); 3933 } 3934 3935 static void 3936 xpt_release_path(struct cam_path *path) 3937 { 3938 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); 3939 if (path->device != NULL) { 3940 xpt_release_device(path->bus, path->target, path->device); 3941 path->device = NULL; 3942 } 3943 if (path->target != NULL) { 3944 xpt_release_target(path->bus, path->target); 3945 path->target = NULL; 3946 } 3947 if (path->bus != NULL) { 3948 xpt_release_bus(path->bus); 3949 path->bus = NULL; 3950 } 3951 } 3952 3953 void 3954 xpt_free_path(struct cam_path *path) 3955 { 3956 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); 3957 xpt_release_path(path); 3958 kfree(path, M_DEVBUF); 3959 } 3960 3961 3962 /* 3963 * Return -1 for failure, 0 for exact match, 1 for match with wildcards 3964 * in path1, 2 for match with wildcards in path2. 3965 */ 3966 int 3967 xpt_path_comp(struct cam_path *path1, struct cam_path *path2) 3968 { 3969 int retval = 0; 3970 3971 if (path1->bus != path2->bus) { 3972 if (path1->bus->path_id == CAM_BUS_WILDCARD) 3973 retval = 1; 3974 else if (path2->bus->path_id == CAM_BUS_WILDCARD) 3975 retval = 2; 3976 else 3977 return (-1); 3978 } 3979 if (path1->target != path2->target) { 3980 if (path1->target->target_id == CAM_TARGET_WILDCARD) { 3981 if (retval == 0) 3982 retval = 1; 3983 } else if (path2->target->target_id == CAM_TARGET_WILDCARD) 3984 retval = 2; 3985 else 3986 return (-1); 3987 } 3988 if (path1->device != path2->device) { 3989 if (path1->device->lun_id == CAM_LUN_WILDCARD) { 3990 if (retval == 0) 3991 retval = 1; 3992 } else if (path2->device->lun_id == CAM_LUN_WILDCARD) 3993 retval = 2; 3994 else 3995 return (-1); 3996 } 3997 return (retval); 3998 } 3999 4000 void 4001 xpt_print_path(struct cam_path *path) 4002 { 4003 if (path == NULL) 4004 kprintf("(nopath): "); 4005 else { 4006 if (path->periph != NULL) 4007 kprintf("(%s%d:", path->periph->periph_name, 4008 path->periph->unit_number); 4009 else 4010 kprintf("(noperiph:"); 4011 4012 if (path->bus != NULL) 4013 kprintf("%s%d:%d:", path->bus->sim->sim_name, 4014 path->bus->sim->unit_number, 4015 path->bus->sim->bus_id); 4016 else 4017 kprintf("nobus:"); 4018 4019 if (path->target != NULL) 4020 kprintf("%d:", path->target->target_id); 4021 else 4022 kprintf("X:"); 4023 4024 if (path->device != NULL) 4025 kprintf("%d): ", path->device->lun_id); 4026 else 4027 kprintf("X): "); 4028 } 4029 } 4030 4031 int 4032 xpt_path_string(struct cam_path *path, char *str, size_t str_len) 4033 { 4034 struct sbuf sb; 4035 4036 sbuf_new(&sb, str, str_len, 0); 4037 4038 if (path == NULL) 4039 sbuf_printf(&sb, "(nopath): "); 4040 else { 4041 if (path->periph != NULL) 4042 sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, 4043 path->periph->unit_number); 4044 else 4045 sbuf_printf(&sb, "(noperiph:"); 4046 4047 if (path->bus != NULL) 4048 sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, 4049 path->bus->sim->unit_number, 4050 path->bus->sim->bus_id); 4051 else 4052 sbuf_printf(&sb, "nobus:"); 4053 4054 if (path->target != NULL) 4055 sbuf_printf(&sb, "%d:", path->target->target_id); 4056 else 4057 sbuf_printf(&sb, "X:"); 4058 4059 if (path->device != NULL) 4060 sbuf_printf(&sb, "%d): ", path->device->lun_id); 4061 else 4062 sbuf_printf(&sb, "X): "); 4063 } 4064 sbuf_finish(&sb); 4065 4066 return(sbuf_len(&sb)); 4067 } 4068 4069 path_id_t 4070 xpt_path_path_id(struct cam_path *path) 4071 { 4072 return(path->bus->path_id); 4073 } 4074 4075 target_id_t 4076 xpt_path_target_id(struct cam_path *path) 4077 { 4078 if (path->target != NULL) 4079 return (path->target->target_id); 4080 else 4081 return (CAM_TARGET_WILDCARD); 4082 } 4083 4084 lun_id_t 4085 xpt_path_lun_id(struct cam_path *path) 4086 { 4087 if (path->device != NULL) 4088 return (path->device->lun_id); 4089 else 4090 return (CAM_LUN_WILDCARD); 4091 } 4092 4093 struct cam_sim * 4094 xpt_path_sim(struct cam_path *path) 4095 { 4096 return (path->bus->sim); 4097 } 4098 4099 struct cam_periph* 4100 xpt_path_periph(struct cam_path *path) 4101 { 4102 return (path->periph); 4103 } 4104 4105 /* 4106 * Release a CAM control block for the caller. Remit the cost of the structure 4107 * to the device referenced by the path. If the this device had no 'credits' 4108 * and peripheral drivers have registered async callbacks for this notification 4109 * call them now. 4110 */ 4111 void 4112 xpt_release_ccb(union ccb *free_ccb) 4113 { 4114 struct cam_path *path; 4115 struct cam_ed *device; 4116 struct cam_eb *bus; 4117 4118 CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); 4119 path = free_ccb->ccb_h.path; 4120 device = path->device; 4121 bus = path->bus; 4122 crit_enter(); 4123 cam_ccbq_release_opening(&device->ccbq); 4124 if (xpt_ccb_count > xpt_max_ccbs) { 4125 xpt_free_ccb(free_ccb); 4126 xpt_ccb_count--; 4127 } else { 4128 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle); 4129 } 4130 if (bus->sim->devq) { 4131 bus->sim->devq->alloc_openings++; 4132 bus->sim->devq->alloc_active--; 4133 } 4134 /* XXX Turn this into an inline function - xpt_run_device?? */ 4135 if ((device_is_alloc_queued(device) == 0) 4136 && (device->drvq.entries > 0)) { 4137 xpt_schedule_dev_allocq(bus, device); 4138 } 4139 crit_exit(); 4140 if (bus->sim->devq && dev_allocq_is_runnable(bus->sim->devq)) 4141 xpt_run_dev_allocq(bus); 4142 } 4143 4144 /* Functions accessed by SIM drivers */ 4145 4146 /* 4147 * A sim structure, listing the SIM entry points and instance 4148 * identification info is passed to xpt_bus_register to hook the SIM 4149 * into the CAM framework. xpt_bus_register creates a cam_eb entry 4150 * for this new bus and places it in the array of busses and assigns 4151 * it a path_id. The path_id may be influenced by "hard wiring" 4152 * information specified by the user. Once interrupt services are 4153 * availible, the bus will be probed. 4154 */ 4155 int32_t 4156 xpt_bus_register(struct cam_sim *sim, u_int32_t bus) 4157 { 4158 struct cam_eb *new_bus; 4159 struct cam_eb *old_bus; 4160 struct ccb_pathinq cpi; 4161 4162 sim->bus_id = bus; 4163 new_bus = kmalloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT); 4164 4165 if (strcmp(sim->sim_name, "xpt") != 0) { 4166 sim->path_id = 4167 xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); 4168 } 4169 4170 TAILQ_INIT(&new_bus->et_entries); 4171 new_bus->path_id = sim->path_id; 4172 new_bus->sim = sim; 4173 ++sim->refcount; 4174 timevalclear(&new_bus->last_reset); 4175 new_bus->flags = 0; 4176 new_bus->refcount = 1; /* Held until a bus_deregister event */ 4177 new_bus->generation = 0; 4178 crit_enter(); 4179 old_bus = TAILQ_FIRST(&xpt_busses); 4180 while (old_bus != NULL 4181 && old_bus->path_id < new_bus->path_id) 4182 old_bus = TAILQ_NEXT(old_bus, links); 4183 if (old_bus != NULL) 4184 TAILQ_INSERT_BEFORE(old_bus, new_bus, links); 4185 else 4186 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links); 4187 bus_generation++; 4188 crit_exit(); 4189 4190 /* Notify interested parties */ 4191 if (sim->path_id != CAM_XPT_PATH_ID) { 4192 struct cam_path path; 4193 4194 xpt_compile_path(&path, /*periph*/NULL, sim->path_id, 4195 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4196 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 4197 cpi.ccb_h.func_code = XPT_PATH_INQ; 4198 xpt_action((union ccb *)&cpi); 4199 xpt_async(AC_PATH_REGISTERED, &path, &cpi); 4200 xpt_release_path(&path); 4201 } 4202 return (CAM_SUCCESS); 4203 } 4204 4205 /* 4206 * Deregister a bus. We must clean out all transactions pending on the bus. 4207 * This routine is typically called prior to cam_sim_free() (e.g. see 4208 * dev/usbmisc/umass/umass.c) 4209 */ 4210 int32_t 4211 xpt_bus_deregister(path_id_t pathid) 4212 { 4213 struct cam_path bus_path; 4214 cam_status status; 4215 4216 status = xpt_compile_path(&bus_path, NULL, pathid, 4217 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 4218 if (status != CAM_REQ_CMP) 4219 return (status); 4220 4221 /* 4222 * This should clear out all pending requests and timeouts, but 4223 * the ccb's may be queued to a software interrupt. 4224 * 4225 * XXX AC_LOST_DEVICE does not precisely abort the pending requests, 4226 * and it really ought to. 4227 */ 4228 xpt_async(AC_LOST_DEVICE, &bus_path, NULL); 4229 xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); 4230 4231 /* make sure all responses have been processed */ 4232 camisr(&cam_netq); 4233 camisr(&cam_bioq); 4234 4235 /* Release the reference count held while registered. */ 4236 xpt_release_bus(bus_path.bus); 4237 xpt_release_path(&bus_path); 4238 4239 return (CAM_REQ_CMP); 4240 } 4241 4242 static path_id_t 4243 xptnextfreepathid(void) 4244 { 4245 struct cam_eb *bus; 4246 path_id_t pathid; 4247 char *strval; 4248 4249 pathid = 0; 4250 bus = TAILQ_FIRST(&xpt_busses); 4251 retry: 4252 /* Find an unoccupied pathid */ 4253 while (bus != NULL 4254 && bus->path_id <= pathid) { 4255 if (bus->path_id == pathid) 4256 pathid++; 4257 bus = TAILQ_NEXT(bus, links); 4258 } 4259 4260 /* 4261 * Ensure that this pathid is not reserved for 4262 * a bus that may be registered in the future. 4263 */ 4264 if (resource_string_value("scbus", pathid, "at", &strval) == 0) { 4265 ++pathid; 4266 /* Start the search over */ 4267 goto retry; 4268 } 4269 return (pathid); 4270 } 4271 4272 static path_id_t 4273 xptpathid(const char *sim_name, int sim_unit, int sim_bus) 4274 { 4275 path_id_t pathid; 4276 int i, dunit, val; 4277 char buf[32]; 4278 4279 pathid = CAM_XPT_PATH_ID; 4280 ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); 4281 i = -1; 4282 while ((i = resource_query_string(i, "at", buf)) != -1) { 4283 if (strcmp(resource_query_name(i), "scbus")) { 4284 /* Avoid a bit of foot shooting. */ 4285 continue; 4286 } 4287 dunit = resource_query_unit(i); 4288 if (dunit < 0) /* unwired?! */ 4289 continue; 4290 if (resource_int_value("scbus", dunit, "bus", &val) == 0) { 4291 if (sim_bus == val) { 4292 pathid = dunit; 4293 break; 4294 } 4295 } else if (sim_bus == 0) { 4296 /* Unspecified matches bus 0 */ 4297 pathid = dunit; 4298 break; 4299 } else { 4300 kprintf("Ambiguous scbus configuration for %s%d " 4301 "bus %d, cannot wire down. The kernel " 4302 "config entry for scbus%d should " 4303 "specify a controller bus.\n" 4304 "Scbus will be assigned dynamically.\n", 4305 sim_name, sim_unit, sim_bus, dunit); 4306 break; 4307 } 4308 } 4309 4310 if (pathid == CAM_XPT_PATH_ID) 4311 pathid = xptnextfreepathid(); 4312 return (pathid); 4313 } 4314 4315 void 4316 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) 4317 { 4318 struct cam_eb *bus; 4319 struct cam_et *target, *next_target; 4320 struct cam_ed *device, *next_device; 4321 4322 CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); 4323 4324 /* 4325 * Most async events come from a CAM interrupt context. In 4326 * a few cases, the error recovery code at the peripheral layer, 4327 * which may run from our SWI or a process context, may signal 4328 * deferred events with a call to xpt_async. Ensure async 4329 * notifications are serialized by blocking cam interrupts. 4330 */ 4331 crit_enter(); 4332 4333 bus = path->bus; 4334 4335 if (async_code == AC_BUS_RESET) { 4336 /* Update our notion of when the last reset occurred */ 4337 microuptime(&bus->last_reset); 4338 } 4339 4340 for (target = TAILQ_FIRST(&bus->et_entries); 4341 target != NULL; 4342 target = next_target) { 4343 4344 next_target = TAILQ_NEXT(target, links); 4345 4346 if (path->target != target 4347 && path->target->target_id != CAM_TARGET_WILDCARD 4348 && target->target_id != CAM_TARGET_WILDCARD) 4349 continue; 4350 4351 if (async_code == AC_SENT_BDR) { 4352 /* Update our notion of when the last reset occurred */ 4353 microuptime(&path->target->last_reset); 4354 } 4355 4356 for (device = TAILQ_FIRST(&target->ed_entries); 4357 device != NULL; 4358 device = next_device) { 4359 4360 next_device = TAILQ_NEXT(device, links); 4361 4362 if (path->device != device 4363 && path->device->lun_id != CAM_LUN_WILDCARD 4364 && device->lun_id != CAM_LUN_WILDCARD) 4365 continue; 4366 4367 xpt_dev_async(async_code, bus, target, 4368 device, async_arg); 4369 4370 xpt_async_bcast(&device->asyncs, async_code, 4371 path, async_arg); 4372 } 4373 } 4374 4375 /* 4376 * If this wasn't a fully wildcarded async, tell all 4377 * clients that want all async events. 4378 */ 4379 if (bus != xpt_periph->path->bus) 4380 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, 4381 path, async_arg); 4382 crit_exit(); 4383 } 4384 4385 static void 4386 xpt_async_bcast(struct async_list *async_head, 4387 u_int32_t async_code, 4388 struct cam_path *path, void *async_arg) 4389 { 4390 struct async_node *cur_entry; 4391 4392 cur_entry = SLIST_FIRST(async_head); 4393 while (cur_entry != NULL) { 4394 struct async_node *next_entry; 4395 /* 4396 * Grab the next list entry before we call the current 4397 * entry's callback. This is because the callback function 4398 * can delete its async callback entry. 4399 */ 4400 next_entry = SLIST_NEXT(cur_entry, links); 4401 if ((cur_entry->event_enable & async_code) != 0) 4402 cur_entry->callback(cur_entry->callback_arg, 4403 async_code, path, 4404 async_arg); 4405 cur_entry = next_entry; 4406 } 4407 } 4408 4409 /* 4410 * Handle any per-device event notifications that require action by the XPT. 4411 */ 4412 static void 4413 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, 4414 struct cam_ed *device, void *async_arg) 4415 { 4416 cam_status status; 4417 struct cam_path newpath; 4418 4419 /* 4420 * We only need to handle events for real devices. 4421 */ 4422 if (target->target_id == CAM_TARGET_WILDCARD 4423 || device->lun_id == CAM_LUN_WILDCARD) 4424 return; 4425 4426 /* 4427 * We need our own path with wildcards expanded to 4428 * handle certain types of events. 4429 */ 4430 if ((async_code == AC_SENT_BDR) 4431 || (async_code == AC_BUS_RESET) 4432 || (async_code == AC_INQ_CHANGED)) 4433 status = xpt_compile_path(&newpath, NULL, 4434 bus->path_id, 4435 target->target_id, 4436 device->lun_id); 4437 else 4438 status = CAM_REQ_CMP_ERR; 4439 4440 if (status == CAM_REQ_CMP) { 4441 4442 /* 4443 * Allow transfer negotiation to occur in a 4444 * tag free environment. 4445 */ 4446 if (async_code == AC_SENT_BDR 4447 || async_code == AC_BUS_RESET) 4448 xpt_toggle_tags(&newpath); 4449 4450 if (async_code == AC_INQ_CHANGED) { 4451 /* 4452 * We've sent a start unit command, or 4453 * something similar to a device that 4454 * may have caused its inquiry data to 4455 * change. So we re-scan the device to 4456 * refresh the inquiry data for it. 4457 */ 4458 xpt_scan_lun(newpath.periph, &newpath, 4459 CAM_EXPECT_INQ_CHANGE, NULL); 4460 } 4461 xpt_release_path(&newpath); 4462 } else if (async_code == AC_LOST_DEVICE) { 4463 /* 4464 * When we lose a device the device may be about to detach 4465 * the sim, we have to clear out all pending timeouts and 4466 * requests before that happens. XXX it would be nice if 4467 * we could abort the requests pertaining to the device. 4468 */ 4469 xpt_release_devq_timeout(device); 4470 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { 4471 device->flags |= CAM_DEV_UNCONFIGURED; 4472 xpt_release_device(bus, target, device); 4473 } 4474 } else if (async_code == AC_TRANSFER_NEG) { 4475 struct ccb_trans_settings *settings; 4476 4477 settings = (struct ccb_trans_settings *)async_arg; 4478 xpt_set_transfer_settings(settings, device, 4479 /*async_update*/TRUE); 4480 } 4481 } 4482 4483 u_int32_t 4484 xpt_freeze_devq(struct cam_path *path, u_int count) 4485 { 4486 struct ccb_hdr *ccbh; 4487 4488 crit_enter(); 4489 path->device->qfrozen_cnt += count; 4490 4491 /* 4492 * Mark the last CCB in the queue as needing 4493 * to be requeued if the driver hasn't 4494 * changed it's state yet. This fixes a race 4495 * where a ccb is just about to be queued to 4496 * a controller driver when it's interrupt routine 4497 * freezes the queue. To completly close the 4498 * hole, controller drives must check to see 4499 * if a ccb's status is still CAM_REQ_INPROG 4500 * under critical section protection just before they queue 4501 * the CCB. See ahc_action/ahc_freeze_devq for 4502 * an example. 4503 */ 4504 ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); 4505 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4506 ccbh->status = CAM_REQUEUE_REQ; 4507 crit_exit(); 4508 return (path->device->qfrozen_cnt); 4509 } 4510 4511 u_int32_t 4512 xpt_freeze_simq(struct cam_sim *sim, u_int count) 4513 { 4514 if (sim->devq == NULL) 4515 return(count); 4516 sim->devq->send_queue.qfrozen_cnt += count; 4517 if (sim->devq->active_dev != NULL) { 4518 struct ccb_hdr *ccbh; 4519 4520 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, 4521 ccb_hdr_tailq); 4522 if (ccbh && ccbh->status == CAM_REQ_INPROG) 4523 ccbh->status = CAM_REQUEUE_REQ; 4524 } 4525 return (sim->devq->send_queue.qfrozen_cnt); 4526 } 4527 4528 /* 4529 * WARNING: most devices, especially USB/UMASS, may detach their sim early. 4530 * We ref-count the sim (and the bus only NULLs it out when the bus has been 4531 * freed, which is not the case here), but the device queue is also freed XXX 4532 * and we have to check that here. 4533 * 4534 * XXX fixme: could we simply not null-out the device queue via 4535 * cam_sim_free()? 4536 */ 4537 static void 4538 xpt_release_devq_timeout(void *arg) 4539 { 4540 struct cam_ed *device; 4541 4542 device = (struct cam_ed *)arg; 4543 4544 xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); 4545 } 4546 4547 void 4548 xpt_release_devq(struct cam_path *path, u_int count, int run_queue) 4549 { 4550 xpt_release_devq_device(path->device, count, run_queue); 4551 } 4552 4553 static void 4554 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) 4555 { 4556 int rundevq; 4557 4558 rundevq = 0; 4559 crit_enter(); 4560 4561 if (dev->qfrozen_cnt > 0) { 4562 4563 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; 4564 dev->qfrozen_cnt -= count; 4565 if (dev->qfrozen_cnt == 0) { 4566 4567 /* 4568 * No longer need to wait for a successful 4569 * command completion. 4570 */ 4571 dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; 4572 4573 /* 4574 * Remove any timeouts that might be scheduled 4575 * to release this queue. 4576 */ 4577 if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4578 callout_stop(&dev->c_handle); 4579 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4580 } 4581 4582 /* 4583 * Now that we are unfrozen schedule the 4584 * device so any pending transactions are 4585 * run. 4586 */ 4587 if ((dev->ccbq.queue.entries > 0) 4588 && (xpt_schedule_dev_sendq(dev->target->bus, dev)) 4589 && (run_queue != 0)) { 4590 rundevq = 1; 4591 } 4592 } 4593 } 4594 if (rundevq != 0) 4595 xpt_run_dev_sendq(dev->target->bus); 4596 crit_exit(); 4597 } 4598 4599 void 4600 xpt_release_simq(struct cam_sim *sim, int run_queue) 4601 { 4602 struct camq *sendq; 4603 4604 if (sim->devq == NULL) 4605 return; 4606 4607 sendq = &(sim->devq->send_queue); 4608 crit_enter(); 4609 4610 if (sendq->qfrozen_cnt > 0) { 4611 sendq->qfrozen_cnt--; 4612 if (sendq->qfrozen_cnt == 0) { 4613 struct cam_eb *bus; 4614 4615 /* 4616 * If there is a timeout scheduled to release this 4617 * sim queue, remove it. The queue frozen count is 4618 * already at 0. 4619 */ 4620 if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ 4621 callout_stop(&sim->c_handle); 4622 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; 4623 } 4624 bus = xpt_find_bus(sim->path_id); 4625 crit_exit(); 4626 4627 if (run_queue) { 4628 /* 4629 * Now that we are unfrozen run the send queue. 4630 */ 4631 xpt_run_dev_sendq(bus); 4632 } 4633 xpt_release_bus(bus); 4634 } else { 4635 crit_exit(); 4636 } 4637 } else { 4638 crit_exit(); 4639 } 4640 } 4641 4642 void 4643 xpt_done(union ccb *done_ccb) 4644 { 4645 crit_enter(); 4646 4647 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); 4648 if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { 4649 /* 4650 * Queue up the request for handling by our SWI handler 4651 * any of the "non-immediate" type of ccbs. 4652 */ 4653 switch (done_ccb->ccb_h.path->periph->type) { 4654 case CAM_PERIPH_BIO: 4655 TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h, 4656 sim_links.tqe); 4657 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4658 setsoftcambio(); 4659 break; 4660 case CAM_PERIPH_NET: 4661 TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h, 4662 sim_links.tqe); 4663 done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; 4664 setsoftcamnet(); 4665 break; 4666 } 4667 } 4668 crit_exit(); 4669 } 4670 4671 union ccb * 4672 xpt_alloc_ccb(void) 4673 { 4674 union ccb *new_ccb; 4675 4676 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4677 return (new_ccb); 4678 } 4679 4680 void 4681 xpt_free_ccb(union ccb *free_ccb) 4682 { 4683 kfree(free_ccb, M_DEVBUF); 4684 } 4685 4686 4687 4688 /* Private XPT functions */ 4689 4690 /* 4691 * Get a CAM control block for the caller. Charge the structure to the device 4692 * referenced by the path. If the this device has no 'credits' then the 4693 * device already has the maximum number of outstanding operations under way 4694 * and we return NULL. If we don't have sufficient resources to allocate more 4695 * ccbs, we also return NULL. 4696 */ 4697 static union ccb * 4698 xpt_get_ccb(struct cam_ed *device) 4699 { 4700 union ccb *new_ccb; 4701 4702 crit_enter(); 4703 if ((new_ccb = (union ccb *)SLIST_FIRST(&ccb_freeq)) == NULL) { 4704 new_ccb = kmalloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT); 4705 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h, 4706 xpt_links.sle); 4707 xpt_ccb_count++; 4708 } 4709 cam_ccbq_take_opening(&device->ccbq); 4710 SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle); 4711 crit_exit(); 4712 return (new_ccb); 4713 } 4714 4715 static void 4716 xpt_release_bus(struct cam_eb *bus) 4717 { 4718 4719 crit_enter(); 4720 if (bus->refcount == 1) { 4721 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL); 4722 TAILQ_REMOVE(&xpt_busses, bus, links); 4723 if (bus->sim) { 4724 cam_sim_release(bus->sim, 0); 4725 bus->sim = NULL; 4726 } 4727 bus_generation++; 4728 KKASSERT(bus->refcount == 1); 4729 kfree(bus, M_DEVBUF); 4730 } else { 4731 --bus->refcount; 4732 } 4733 crit_exit(); 4734 } 4735 4736 static struct cam_et * 4737 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) 4738 { 4739 struct cam_et *target; 4740 struct cam_et *cur_target; 4741 4742 target = kmalloc(sizeof(*target), M_DEVBUF, M_INTWAIT); 4743 4744 TAILQ_INIT(&target->ed_entries); 4745 target->bus = bus; 4746 target->target_id = target_id; 4747 target->refcount = 1; 4748 target->generation = 0; 4749 timevalclear(&target->last_reset); 4750 /* 4751 * Hold a reference to our parent bus so it 4752 * will not go away before we do. 4753 */ 4754 bus->refcount++; 4755 4756 /* Insertion sort into our bus's target list */ 4757 cur_target = TAILQ_FIRST(&bus->et_entries); 4758 while (cur_target != NULL && cur_target->target_id < target_id) 4759 cur_target = TAILQ_NEXT(cur_target, links); 4760 4761 if (cur_target != NULL) { 4762 TAILQ_INSERT_BEFORE(cur_target, target, links); 4763 } else { 4764 TAILQ_INSERT_TAIL(&bus->et_entries, target, links); 4765 } 4766 bus->generation++; 4767 return (target); 4768 } 4769 4770 static void 4771 xpt_release_target(struct cam_eb *bus, struct cam_et *target) 4772 { 4773 crit_enter(); 4774 if (target->refcount == 1) { 4775 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); 4776 TAILQ_REMOVE(&bus->et_entries, target, links); 4777 bus->generation++; 4778 xpt_release_bus(bus); 4779 KKASSERT(target->refcount == 1); 4780 kfree(target, M_DEVBUF); 4781 } else { 4782 --target->refcount; 4783 } 4784 crit_exit(); 4785 } 4786 4787 static struct cam_ed * 4788 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) 4789 { 4790 #ifdef CAM_NEW_TRAN_CODE 4791 struct cam_path path; 4792 #endif /* CAM_NEW_TRAN_CODE */ 4793 struct cam_ed *device; 4794 struct cam_devq *devq; 4795 cam_status status; 4796 4797 /* Make space for us in the device queue on our bus */ 4798 if (bus->sim->devq == NULL) 4799 return(NULL); 4800 devq = bus->sim->devq; 4801 status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); 4802 4803 if (status != CAM_REQ_CMP) { 4804 device = NULL; 4805 } else { 4806 device = kmalloc(sizeof(*device), M_DEVBUF, M_INTWAIT); 4807 } 4808 4809 if (device != NULL) { 4810 struct cam_ed *cur_device; 4811 4812 cam_init_pinfo(&device->alloc_ccb_entry.pinfo); 4813 device->alloc_ccb_entry.device = device; 4814 cam_init_pinfo(&device->send_ccb_entry.pinfo); 4815 device->send_ccb_entry.device = device; 4816 device->target = target; 4817 device->lun_id = lun_id; 4818 /* Initialize our queues */ 4819 if (camq_init(&device->drvq, 0) != 0) { 4820 kfree(device, M_DEVBUF); 4821 return (NULL); 4822 } 4823 if (cam_ccbq_init(&device->ccbq, 4824 bus->sim->max_dev_openings) != 0) { 4825 camq_fini(&device->drvq); 4826 kfree(device, M_DEVBUF); 4827 return (NULL); 4828 } 4829 SLIST_INIT(&device->asyncs); 4830 SLIST_INIT(&device->periphs); 4831 device->generation = 0; 4832 device->owner = NULL; 4833 /* 4834 * Take the default quirk entry until we have inquiry 4835 * data and can determine a better quirk to use. 4836 */ 4837 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; 4838 bzero(&device->inq_data, sizeof(device->inq_data)); 4839 device->inq_flags = 0; 4840 device->queue_flags = 0; 4841 device->serial_num = NULL; 4842 device->serial_num_len = 0; 4843 device->qfrozen_cnt = 0; 4844 device->flags = CAM_DEV_UNCONFIGURED; 4845 device->tag_delay_count = 0; 4846 device->refcount = 1; 4847 callout_init(&device->c_handle); 4848 4849 /* 4850 * Hold a reference to our parent target so it 4851 * will not go away before we do. 4852 */ 4853 target->refcount++; 4854 4855 /* 4856 * XXX should be limited by number of CCBs this bus can 4857 * do. 4858 */ 4859 xpt_max_ccbs += device->ccbq.devq_openings; 4860 /* Insertion sort into our target's device list */ 4861 cur_device = TAILQ_FIRST(&target->ed_entries); 4862 while (cur_device != NULL && cur_device->lun_id < lun_id) 4863 cur_device = TAILQ_NEXT(cur_device, links); 4864 if (cur_device != NULL) { 4865 TAILQ_INSERT_BEFORE(cur_device, device, links); 4866 } else { 4867 TAILQ_INSERT_TAIL(&target->ed_entries, device, links); 4868 } 4869 target->generation++; 4870 #ifdef CAM_NEW_TRAN_CODE 4871 if (lun_id != CAM_LUN_WILDCARD) { 4872 xpt_compile_path(&path, 4873 NULL, 4874 bus->path_id, 4875 target->target_id, 4876 lun_id); 4877 xpt_devise_transport(&path); 4878 xpt_release_path(&path); 4879 } 4880 #endif /* CAM_NEW_TRAN_CODE */ 4881 } 4882 return (device); 4883 } 4884 4885 static void 4886 xpt_reference_device(struct cam_ed *device) 4887 { 4888 ++device->refcount; 4889 } 4890 4891 static void 4892 xpt_release_device(struct cam_eb *bus, struct cam_et *target, 4893 struct cam_ed *device) 4894 { 4895 struct cam_devq *devq; 4896 4897 crit_enter(); 4898 if (device->refcount == 1) { 4899 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); 4900 4901 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX 4902 || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) 4903 panic("Removing device while still queued for ccbs"); 4904 4905 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { 4906 device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; 4907 callout_stop(&device->c_handle); 4908 } 4909 4910 TAILQ_REMOVE(&target->ed_entries, device,links); 4911 target->generation++; 4912 xpt_max_ccbs -= device->ccbq.devq_openings; 4913 /* Release our slot in the devq */ 4914 devq = bus->sim->devq; 4915 cam_devq_resize(devq, devq->alloc_queue.array_size - 1); 4916 xpt_release_target(bus, target); 4917 KKASSERT(device->refcount == 1); 4918 kfree(device, M_DEVBUF); 4919 } else { 4920 --device->refcount; 4921 } 4922 crit_exit(); 4923 } 4924 4925 static u_int32_t 4926 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) 4927 { 4928 int diff; 4929 int result; 4930 struct cam_ed *dev; 4931 4932 dev = path->device; 4933 4934 crit_enter(); 4935 4936 diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); 4937 result = cam_ccbq_resize(&dev->ccbq, newopenings); 4938 if (result == CAM_REQ_CMP && (diff < 0)) { 4939 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; 4940 } 4941 /* Adjust the global limit */ 4942 xpt_max_ccbs += diff; 4943 crit_exit(); 4944 return (result); 4945 } 4946 4947 static struct cam_eb * 4948 xpt_find_bus(path_id_t path_id) 4949 { 4950 struct cam_eb *bus; 4951 4952 TAILQ_FOREACH(bus, &xpt_busses, links) { 4953 if (bus->path_id == path_id) { 4954 bus->refcount++; 4955 break; 4956 } 4957 } 4958 return (bus); 4959 } 4960 4961 static struct cam_et * 4962 xpt_find_target(struct cam_eb *bus, target_id_t target_id) 4963 { 4964 struct cam_et *target; 4965 4966 TAILQ_FOREACH(target, &bus->et_entries, links) { 4967 if (target->target_id == target_id) { 4968 target->refcount++; 4969 break; 4970 } 4971 } 4972 return (target); 4973 } 4974 4975 static struct cam_ed * 4976 xpt_find_device(struct cam_et *target, lun_id_t lun_id) 4977 { 4978 struct cam_ed *device; 4979 4980 TAILQ_FOREACH(device, &target->ed_entries, links) { 4981 if (device->lun_id == lun_id) { 4982 device->refcount++; 4983 break; 4984 } 4985 } 4986 return (device); 4987 } 4988 4989 typedef struct { 4990 union ccb *request_ccb; 4991 struct ccb_pathinq *cpi; 4992 int pending_count; 4993 } xpt_scan_bus_info; 4994 4995 /* 4996 * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. 4997 * As the scan progresses, xpt_scan_bus is used as the 4998 * callback on completion function. 4999 */ 5000 static void 5001 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) 5002 { 5003 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5004 ("xpt_scan_bus\n")); 5005 switch (request_ccb->ccb_h.func_code) { 5006 case XPT_SCAN_BUS: 5007 { 5008 xpt_scan_bus_info *scan_info; 5009 union ccb *work_ccb; 5010 struct cam_path *path; 5011 u_int i; 5012 u_int max_target; 5013 u_int initiator_id; 5014 5015 /* Find out the characteristics of the bus */ 5016 work_ccb = xpt_alloc_ccb(); 5017 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, 5018 request_ccb->ccb_h.pinfo.priority); 5019 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 5020 xpt_action(work_ccb); 5021 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 5022 request_ccb->ccb_h.status = work_ccb->ccb_h.status; 5023 xpt_free_ccb(work_ccb); 5024 xpt_done(request_ccb); 5025 return; 5026 } 5027 5028 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5029 /* 5030 * Can't scan the bus on an adapter that 5031 * cannot perform the initiator role. 5032 */ 5033 request_ccb->ccb_h.status = CAM_REQ_CMP; 5034 xpt_free_ccb(work_ccb); 5035 xpt_done(request_ccb); 5036 return; 5037 } 5038 5039 /* Save some state for use while we probe for devices */ 5040 scan_info = (xpt_scan_bus_info *) 5041 kmalloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT); 5042 scan_info->request_ccb = request_ccb; 5043 scan_info->cpi = &work_ccb->cpi; 5044 5045 /* Cache on our stack so we can work asynchronously */ 5046 max_target = scan_info->cpi->max_target; 5047 initiator_id = scan_info->cpi->initiator_id; 5048 5049 /* 5050 * Don't count the initiator if the 5051 * initiator is addressable. 5052 */ 5053 scan_info->pending_count = max_target + 1; 5054 if (initiator_id <= max_target) 5055 scan_info->pending_count--; 5056 5057 for (i = 0; i <= max_target; i++) { 5058 cam_status status; 5059 if (i == initiator_id) 5060 continue; 5061 5062 status = xpt_create_path(&path, xpt_periph, 5063 request_ccb->ccb_h.path_id, 5064 i, 0); 5065 if (status != CAM_REQ_CMP) { 5066 kprintf("xpt_scan_bus: xpt_create_path failed" 5067 " with status %#x, bus scan halted\n", 5068 status); 5069 break; 5070 } 5071 work_ccb = xpt_alloc_ccb(); 5072 xpt_setup_ccb(&work_ccb->ccb_h, path, 5073 request_ccb->ccb_h.pinfo.priority); 5074 work_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5075 work_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5076 work_ccb->ccb_h.ppriv_ptr0 = scan_info; 5077 work_ccb->crcn.flags = request_ccb->crcn.flags; 5078 xpt_action(work_ccb); 5079 } 5080 break; 5081 } 5082 case XPT_SCAN_LUN: 5083 { 5084 xpt_scan_bus_info *scan_info; 5085 path_id_t path_id; 5086 target_id_t target_id; 5087 lun_id_t lun_id; 5088 5089 /* Reuse the same CCB to query if a device was really found */ 5090 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; 5091 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, 5092 request_ccb->ccb_h.pinfo.priority); 5093 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5094 5095 path_id = request_ccb->ccb_h.path_id; 5096 target_id = request_ccb->ccb_h.target_id; 5097 lun_id = request_ccb->ccb_h.target_lun; 5098 xpt_action(request_ccb); 5099 5100 if (request_ccb->ccb_h.status != CAM_REQ_CMP) { 5101 struct cam_ed *device; 5102 struct cam_et *target; 5103 int phl; 5104 5105 /* 5106 * If we already probed lun 0 successfully, or 5107 * we have additional configured luns on this 5108 * target that might have "gone away", go onto 5109 * the next lun. 5110 */ 5111 target = request_ccb->ccb_h.path->target; 5112 /* 5113 * We may touch devices that we don't 5114 * hold references too, so ensure they 5115 * don't disappear out from under us. 5116 * The target above is referenced by the 5117 * path in the request ccb. 5118 */ 5119 phl = 0; 5120 crit_enter(); 5121 device = TAILQ_FIRST(&target->ed_entries); 5122 if (device != NULL) { 5123 phl = device->quirk->quirks & CAM_QUIRK_HILUNS; 5124 if (device->lun_id == 0) 5125 device = TAILQ_NEXT(device, links); 5126 } 5127 crit_exit(); 5128 if ((lun_id != 0) || (device != NULL)) { 5129 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) 5130 lun_id++; 5131 } 5132 } else { 5133 struct cam_ed *device; 5134 5135 device = request_ccb->ccb_h.path->device; 5136 5137 if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { 5138 /* Try the next lun */ 5139 if (lun_id < (CAM_SCSI2_MAXLUN-1) || 5140 (device->quirk->quirks & CAM_QUIRK_HILUNS)) 5141 lun_id++; 5142 } 5143 } 5144 5145 xpt_free_path(request_ccb->ccb_h.path); 5146 5147 /* Check Bounds */ 5148 if ((lun_id == request_ccb->ccb_h.target_lun) 5149 || lun_id > scan_info->cpi->max_lun) { 5150 /* We're done */ 5151 5152 xpt_free_ccb(request_ccb); 5153 scan_info->pending_count--; 5154 if (scan_info->pending_count == 0) { 5155 xpt_free_ccb((union ccb *)scan_info->cpi); 5156 request_ccb = scan_info->request_ccb; 5157 kfree(scan_info, M_TEMP); 5158 request_ccb->ccb_h.status = CAM_REQ_CMP; 5159 xpt_done(request_ccb); 5160 } 5161 } else { 5162 /* Try the next device */ 5163 struct cam_path *path; 5164 cam_status status; 5165 5166 path = request_ccb->ccb_h.path; 5167 status = xpt_create_path(&path, xpt_periph, 5168 path_id, target_id, lun_id); 5169 if (status != CAM_REQ_CMP) { 5170 kprintf("xpt_scan_bus: xpt_create_path failed " 5171 "with status %#x, halting LUN scan\n", 5172 status); 5173 xpt_free_ccb(request_ccb); 5174 scan_info->pending_count--; 5175 if (scan_info->pending_count == 0) { 5176 xpt_free_ccb( 5177 (union ccb *)scan_info->cpi); 5178 request_ccb = scan_info->request_ccb; 5179 kfree(scan_info, M_TEMP); 5180 request_ccb->ccb_h.status = CAM_REQ_CMP; 5181 xpt_done(request_ccb); 5182 break; 5183 } 5184 } 5185 xpt_setup_ccb(&request_ccb->ccb_h, path, 5186 request_ccb->ccb_h.pinfo.priority); 5187 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5188 request_ccb->ccb_h.cbfcnp = xpt_scan_bus; 5189 request_ccb->ccb_h.ppriv_ptr0 = scan_info; 5190 request_ccb->crcn.flags = 5191 scan_info->request_ccb->crcn.flags; 5192 xpt_action(request_ccb); 5193 } 5194 break; 5195 } 5196 default: 5197 break; 5198 } 5199 } 5200 5201 typedef enum { 5202 PROBE_TUR, 5203 PROBE_INQUIRY, 5204 PROBE_FULL_INQUIRY, 5205 PROBE_MODE_SENSE, 5206 PROBE_SERIAL_NUM, 5207 PROBE_TUR_FOR_NEGOTIATION 5208 } probe_action; 5209 5210 typedef enum { 5211 PROBE_INQUIRY_CKSUM = 0x01, 5212 PROBE_SERIAL_CKSUM = 0x02, 5213 PROBE_NO_ANNOUNCE = 0x04 5214 } probe_flags; 5215 5216 typedef struct { 5217 TAILQ_HEAD(, ccb_hdr) request_ccbs; 5218 probe_action action; 5219 union ccb saved_ccb; 5220 probe_flags flags; 5221 MD5_CTX context; 5222 u_int8_t digest[16]; 5223 } probe_softc; 5224 5225 static void 5226 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, 5227 cam_flags flags, union ccb *request_ccb) 5228 { 5229 struct ccb_pathinq cpi; 5230 cam_status status; 5231 struct cam_path *new_path; 5232 struct cam_periph *old_periph; 5233 5234 CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, 5235 ("xpt_scan_lun\n")); 5236 5237 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5238 cpi.ccb_h.func_code = XPT_PATH_INQ; 5239 xpt_action((union ccb *)&cpi); 5240 5241 if (cpi.ccb_h.status != CAM_REQ_CMP) { 5242 if (request_ccb != NULL) { 5243 request_ccb->ccb_h.status = cpi.ccb_h.status; 5244 xpt_done(request_ccb); 5245 } 5246 return; 5247 } 5248 5249 if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { 5250 /* 5251 * Can't scan the bus on an adapter that 5252 * cannot perform the initiator role. 5253 */ 5254 if (request_ccb != NULL) { 5255 request_ccb->ccb_h.status = CAM_REQ_CMP; 5256 xpt_done(request_ccb); 5257 } 5258 return; 5259 } 5260 5261 if (request_ccb == NULL) { 5262 request_ccb = kmalloc(sizeof(union ccb), M_TEMP, M_INTWAIT); 5263 new_path = kmalloc(sizeof(*new_path), M_TEMP, M_INTWAIT); 5264 status = xpt_compile_path(new_path, xpt_periph, 5265 path->bus->path_id, 5266 path->target->target_id, 5267 path->device->lun_id); 5268 5269 if (status != CAM_REQ_CMP) { 5270 xpt_print_path(path); 5271 kprintf("xpt_scan_lun: can't compile path, can't " 5272 "continue\n"); 5273 kfree(request_ccb, M_TEMP); 5274 kfree(new_path, M_TEMP); 5275 return; 5276 } 5277 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); 5278 request_ccb->ccb_h.cbfcnp = xptscandone; 5279 request_ccb->ccb_h.func_code = XPT_SCAN_LUN; 5280 request_ccb->crcn.flags = flags; 5281 } 5282 5283 crit_enter(); 5284 if ((old_periph = cam_periph_find(path, "probe")) != NULL) { 5285 probe_softc *softc; 5286 5287 softc = (probe_softc *)old_periph->softc; 5288 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5289 periph_links.tqe); 5290 } else { 5291 status = cam_periph_alloc(proberegister, NULL, probecleanup, 5292 probestart, "probe", 5293 CAM_PERIPH_BIO, 5294 request_ccb->ccb_h.path, NULL, 0, 5295 request_ccb); 5296 5297 if (status != CAM_REQ_CMP) { 5298 xpt_print_path(path); 5299 kprintf("xpt_scan_lun: cam_alloc_periph returned an " 5300 "error, can't continue probe\n"); 5301 request_ccb->ccb_h.status = status; 5302 xpt_done(request_ccb); 5303 } 5304 } 5305 crit_exit(); 5306 } 5307 5308 static void 5309 xptscandone(struct cam_periph *periph, union ccb *done_ccb) 5310 { 5311 xpt_release_path(done_ccb->ccb_h.path); 5312 kfree(done_ccb->ccb_h.path, M_TEMP); 5313 kfree(done_ccb, M_TEMP); 5314 } 5315 5316 static cam_status 5317 proberegister(struct cam_periph *periph, void *arg) 5318 { 5319 union ccb *request_ccb; /* CCB representing the probe request */ 5320 probe_softc *softc; 5321 5322 request_ccb = (union ccb *)arg; 5323 if (periph == NULL) { 5324 kprintf("proberegister: periph was NULL!!\n"); 5325 return(CAM_REQ_CMP_ERR); 5326 } 5327 5328 if (request_ccb == NULL) { 5329 kprintf("proberegister: no probe CCB, " 5330 "can't register device\n"); 5331 return(CAM_REQ_CMP_ERR); 5332 } 5333 5334 softc = kmalloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO); 5335 TAILQ_INIT(&softc->request_ccbs); 5336 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, 5337 periph_links.tqe); 5338 softc->flags = 0; 5339 periph->softc = softc; 5340 cam_periph_acquire(periph); 5341 /* 5342 * Ensure we've waited at least a bus settle 5343 * delay before attempting to probe the device. 5344 * For HBAs that don't do bus resets, this won't make a difference. 5345 */ 5346 cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, 5347 SCSI_DELAY); 5348 probeschedule(periph); 5349 return(CAM_REQ_CMP); 5350 } 5351 5352 static void 5353 probeschedule(struct cam_periph *periph) 5354 { 5355 struct ccb_pathinq cpi; 5356 union ccb *ccb; 5357 probe_softc *softc; 5358 5359 softc = (probe_softc *)periph->softc; 5360 ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5361 5362 xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); 5363 cpi.ccb_h.func_code = XPT_PATH_INQ; 5364 xpt_action((union ccb *)&cpi); 5365 5366 /* 5367 * If a device has gone away and another device, or the same one, 5368 * is back in the same place, it should have a unit attention 5369 * condition pending. It will not report the unit attention in 5370 * response to an inquiry, which may leave invalid transfer 5371 * negotiations in effect. The TUR will reveal the unit attention 5372 * condition. Only send the TUR for lun 0, since some devices 5373 * will get confused by commands other than inquiry to non-existent 5374 * luns. If you think a device has gone away start your scan from 5375 * lun 0. This will insure that any bogus transfer settings are 5376 * invalidated. 5377 * 5378 * If we haven't seen the device before and the controller supports 5379 * some kind of transfer negotiation, negotiate with the first 5380 * sent command if no bus reset was performed at startup. This 5381 * ensures that the device is not confused by transfer negotiation 5382 * settings left over by loader or BIOS action. 5383 */ 5384 if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) 5385 && (ccb->ccb_h.target_lun == 0)) { 5386 softc->action = PROBE_TUR; 5387 } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 5388 && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { 5389 proberequestdefaultnegotiation(periph); 5390 softc->action = PROBE_INQUIRY; 5391 } else { 5392 softc->action = PROBE_INQUIRY; 5393 } 5394 5395 if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) 5396 softc->flags |= PROBE_NO_ANNOUNCE; 5397 else 5398 softc->flags &= ~PROBE_NO_ANNOUNCE; 5399 5400 xpt_schedule(periph, ccb->ccb_h.pinfo.priority); 5401 } 5402 5403 static void 5404 probestart(struct cam_periph *periph, union ccb *start_ccb) 5405 { 5406 /* Probe the device that our peripheral driver points to */ 5407 struct ccb_scsiio *csio; 5408 probe_softc *softc; 5409 5410 CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); 5411 5412 softc = (probe_softc *)periph->softc; 5413 csio = &start_ccb->csio; 5414 5415 switch (softc->action) { 5416 case PROBE_TUR: 5417 case PROBE_TUR_FOR_NEGOTIATION: 5418 { 5419 scsi_test_unit_ready(csio, 5420 /*retries*/4, 5421 probedone, 5422 MSG_SIMPLE_Q_TAG, 5423 SSD_FULL_SIZE, 5424 /*timeout*/60000); 5425 break; 5426 } 5427 case PROBE_INQUIRY: 5428 case PROBE_FULL_INQUIRY: 5429 { 5430 u_int inquiry_len; 5431 struct scsi_inquiry_data *inq_buf; 5432 5433 inq_buf = &periph->path->device->inq_data; 5434 /* 5435 * If the device is currently configured, we calculate an 5436 * MD5 checksum of the inquiry data, and if the serial number 5437 * length is greater than 0, add the serial number data 5438 * into the checksum as well. Once the inquiry and the 5439 * serial number check finish, we attempt to figure out 5440 * whether we still have the same device. 5441 */ 5442 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5443 5444 MD5Init(&softc->context); 5445 MD5Update(&softc->context, (unsigned char *)inq_buf, 5446 sizeof(struct scsi_inquiry_data)); 5447 softc->flags |= PROBE_INQUIRY_CKSUM; 5448 if (periph->path->device->serial_num_len > 0) { 5449 MD5Update(&softc->context, 5450 periph->path->device->serial_num, 5451 periph->path->device->serial_num_len); 5452 softc->flags |= PROBE_SERIAL_CKSUM; 5453 } 5454 MD5Final(softc->digest, &softc->context); 5455 } 5456 5457 if (softc->action == PROBE_INQUIRY) 5458 inquiry_len = SHORT_INQUIRY_LENGTH; 5459 else 5460 inquiry_len = inq_buf->additional_length + 5; 5461 5462 scsi_inquiry(csio, 5463 /*retries*/4, 5464 probedone, 5465 MSG_SIMPLE_Q_TAG, 5466 (u_int8_t *)inq_buf, 5467 inquiry_len, 5468 /*evpd*/FALSE, 5469 /*page_code*/0, 5470 SSD_MIN_SIZE, 5471 /*timeout*/60 * 1000); 5472 break; 5473 } 5474 case PROBE_MODE_SENSE: 5475 { 5476 void *mode_buf; 5477 int mode_buf_len; 5478 5479 mode_buf_len = sizeof(struct scsi_mode_header_6) 5480 + sizeof(struct scsi_mode_blk_desc) 5481 + sizeof(struct scsi_control_page); 5482 mode_buf = kmalloc(mode_buf_len, M_TEMP, M_INTWAIT); 5483 scsi_mode_sense(csio, 5484 /*retries*/4, 5485 probedone, 5486 MSG_SIMPLE_Q_TAG, 5487 /*dbd*/FALSE, 5488 SMS_PAGE_CTRL_CURRENT, 5489 SMS_CONTROL_MODE_PAGE, 5490 mode_buf, 5491 mode_buf_len, 5492 SSD_FULL_SIZE, 5493 /*timeout*/60000); 5494 break; 5495 } 5496 case PROBE_SERIAL_NUM: 5497 { 5498 struct scsi_vpd_unit_serial_number *serial_buf; 5499 struct cam_ed* device; 5500 5501 serial_buf = NULL; 5502 device = periph->path->device; 5503 device->serial_num = NULL; 5504 device->serial_num_len = 0; 5505 5506 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { 5507 serial_buf = kmalloc(sizeof(*serial_buf), M_TEMP, 5508 M_INTWAIT | M_ZERO); 5509 scsi_inquiry(csio, 5510 /*retries*/4, 5511 probedone, 5512 MSG_SIMPLE_Q_TAG, 5513 (u_int8_t *)serial_buf, 5514 sizeof(*serial_buf), 5515 /*evpd*/TRUE, 5516 SVPD_UNIT_SERIAL_NUMBER, 5517 SSD_MIN_SIZE, 5518 /*timeout*/60 * 1000); 5519 break; 5520 } 5521 /* 5522 * We'll have to do without, let our probedone 5523 * routine finish up for us. 5524 */ 5525 start_ccb->csio.data_ptr = NULL; 5526 probedone(periph, start_ccb); 5527 return; 5528 } 5529 } 5530 xpt_action(start_ccb); 5531 } 5532 5533 static void 5534 proberequestdefaultnegotiation(struct cam_periph *periph) 5535 { 5536 struct ccb_trans_settings cts; 5537 5538 xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); 5539 cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 5540 #ifdef CAM_NEW_TRAN_CODE 5541 cts.type = CTS_TYPE_USER_SETTINGS; 5542 #else /* CAM_NEW_TRAN_CODE */ 5543 cts.flags = CCB_TRANS_USER_SETTINGS; 5544 #endif /* CAM_NEW_TRAN_CODE */ 5545 xpt_action((union ccb *)&cts); 5546 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5547 #ifdef CAM_NEW_TRAN_CODE 5548 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5549 #else /* CAM_NEW_TRAN_CODE */ 5550 cts.flags &= ~CCB_TRANS_USER_SETTINGS; 5551 cts.flags |= CCB_TRANS_CURRENT_SETTINGS; 5552 #endif /* CAM_NEW_TRAN_CODE */ 5553 xpt_action((union ccb *)&cts); 5554 } 5555 5556 static void 5557 probedone(struct cam_periph *periph, union ccb *done_ccb) 5558 { 5559 probe_softc *softc; 5560 struct cam_path *path; 5561 u_int32_t priority; 5562 5563 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); 5564 5565 softc = (probe_softc *)periph->softc; 5566 path = done_ccb->ccb_h.path; 5567 priority = done_ccb->ccb_h.pinfo.priority; 5568 5569 switch (softc->action) { 5570 case PROBE_TUR: 5571 { 5572 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { 5573 5574 if (cam_periph_error(done_ccb, 0, 5575 SF_NO_PRINT, NULL) == ERESTART) 5576 return; 5577 else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) 5578 /* Don't wedge the queue */ 5579 xpt_release_devq(done_ccb->ccb_h.path, 5580 /*count*/1, 5581 /*run_queue*/TRUE); 5582 } 5583 softc->action = PROBE_INQUIRY; 5584 xpt_release_ccb(done_ccb); 5585 xpt_schedule(periph, priority); 5586 return; 5587 } 5588 case PROBE_INQUIRY: 5589 case PROBE_FULL_INQUIRY: 5590 { 5591 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5592 struct scsi_inquiry_data *inq_buf; 5593 u_int8_t periph_qual; 5594 5595 path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; 5596 inq_buf = &path->device->inq_data; 5597 5598 periph_qual = SID_QUAL(inq_buf); 5599 5600 switch(periph_qual) { 5601 case SID_QUAL_LU_CONNECTED: 5602 { 5603 u_int8_t alen; 5604 5605 /* 5606 * We conservatively request only 5607 * SHORT_INQUIRY_LEN bytes of inquiry 5608 * information during our first try 5609 * at sending an INQUIRY. If the device 5610 * has more information to give, 5611 * perform a second request specifying 5612 * the amount of information the device 5613 * is willing to give. 5614 */ 5615 alen = inq_buf->additional_length; 5616 if (softc->action == PROBE_INQUIRY 5617 && alen > (SHORT_INQUIRY_LENGTH - 5)) { 5618 softc->action = PROBE_FULL_INQUIRY; 5619 xpt_release_ccb(done_ccb); 5620 xpt_schedule(periph, priority); 5621 return; 5622 } 5623 5624 xpt_find_quirk(path->device); 5625 5626 #ifdef CAM_NEW_TRAN_CODE 5627 xpt_devise_transport(path); 5628 #endif /* CAM_NEW_TRAN_CODE */ 5629 if ((inq_buf->flags & SID_CmdQue) != 0) 5630 softc->action = PROBE_MODE_SENSE; 5631 else 5632 softc->action = PROBE_SERIAL_NUM; 5633 5634 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5635 xpt_reference_device(path->device); 5636 5637 xpt_release_ccb(done_ccb); 5638 xpt_schedule(periph, priority); 5639 return; 5640 } 5641 default: 5642 break; 5643 } 5644 } else if (cam_periph_error(done_ccb, 0, 5645 done_ccb->ccb_h.target_lun > 0 5646 ? SF_RETRY_UA|SF_QUIET_IR 5647 : SF_RETRY_UA, 5648 &softc->saved_ccb) == ERESTART) { 5649 return; 5650 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5651 /* Don't wedge the queue */ 5652 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5653 /*run_queue*/TRUE); 5654 } 5655 /* 5656 * If we get to this point, we got an error status back 5657 * from the inquiry and the error status doesn't require 5658 * automatically retrying the command. Therefore, the 5659 * inquiry failed. If we had inquiry information before 5660 * for this device, but this latest inquiry command failed, 5661 * the device has probably gone away. If this device isn't 5662 * already marked unconfigured, notify the peripheral 5663 * drivers that this device is no more. 5664 */ 5665 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { 5666 /* Send the async notification. */ 5667 xpt_async(AC_LOST_DEVICE, path, NULL); 5668 } 5669 5670 xpt_release_ccb(done_ccb); 5671 break; 5672 } 5673 case PROBE_MODE_SENSE: 5674 { 5675 struct ccb_scsiio *csio; 5676 struct scsi_mode_header_6 *mode_hdr; 5677 5678 csio = &done_ccb->csio; 5679 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; 5680 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { 5681 struct scsi_control_page *page; 5682 u_int8_t *offset; 5683 5684 offset = ((u_int8_t *)&mode_hdr[1]) 5685 + mode_hdr->blk_desc_len; 5686 page = (struct scsi_control_page *)offset; 5687 path->device->queue_flags = page->queue_flags; 5688 } else if (cam_periph_error(done_ccb, 0, 5689 SF_RETRY_UA|SF_NO_PRINT, 5690 &softc->saved_ccb) == ERESTART) { 5691 return; 5692 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5693 /* Don't wedge the queue */ 5694 xpt_release_devq(done_ccb->ccb_h.path, 5695 /*count*/1, /*run_queue*/TRUE); 5696 } 5697 xpt_release_ccb(done_ccb); 5698 kfree(mode_hdr, M_TEMP); 5699 softc->action = PROBE_SERIAL_NUM; 5700 xpt_schedule(periph, priority); 5701 return; 5702 } 5703 case PROBE_SERIAL_NUM: 5704 { 5705 struct ccb_scsiio *csio; 5706 struct scsi_vpd_unit_serial_number *serial_buf; 5707 u_int32_t priority; 5708 int changed; 5709 int have_serialnum; 5710 5711 changed = 1; 5712 have_serialnum = 0; 5713 csio = &done_ccb->csio; 5714 priority = done_ccb->ccb_h.pinfo.priority; 5715 serial_buf = 5716 (struct scsi_vpd_unit_serial_number *)csio->data_ptr; 5717 5718 /* Clean up from previous instance of this device */ 5719 if (path->device->serial_num != NULL) { 5720 kfree(path->device->serial_num, M_DEVBUF); 5721 path->device->serial_num = NULL; 5722 path->device->serial_num_len = 0; 5723 } 5724 5725 if (serial_buf == NULL) { 5726 /* 5727 * Don't process the command as it was never sent 5728 */ 5729 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP 5730 && (serial_buf->length > 0)) { 5731 5732 have_serialnum = 1; 5733 path->device->serial_num = 5734 kmalloc((serial_buf->length + 1), 5735 M_DEVBUF, M_INTWAIT); 5736 bcopy(serial_buf->serial_num, 5737 path->device->serial_num, 5738 serial_buf->length); 5739 path->device->serial_num_len = serial_buf->length; 5740 path->device->serial_num[serial_buf->length] = '\0'; 5741 } else if (cam_periph_error(done_ccb, 0, 5742 SF_RETRY_UA|SF_NO_PRINT, 5743 &softc->saved_ccb) == ERESTART) { 5744 return; 5745 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5746 /* Don't wedge the queue */ 5747 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5748 /*run_queue*/TRUE); 5749 } 5750 5751 /* 5752 * Let's see if we have seen this device before. 5753 */ 5754 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { 5755 MD5_CTX context; 5756 u_int8_t digest[16]; 5757 5758 MD5Init(&context); 5759 5760 MD5Update(&context, 5761 (unsigned char *)&path->device->inq_data, 5762 sizeof(struct scsi_inquiry_data)); 5763 5764 if (have_serialnum) 5765 MD5Update(&context, serial_buf->serial_num, 5766 serial_buf->length); 5767 5768 MD5Final(digest, &context); 5769 if (bcmp(softc->digest, digest, 16) == 0) 5770 changed = 0; 5771 5772 /* 5773 * XXX Do we need to do a TUR in order to ensure 5774 * that the device really hasn't changed??? 5775 */ 5776 if ((changed != 0) 5777 && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) 5778 xpt_async(AC_LOST_DEVICE, path, NULL); 5779 } 5780 if (serial_buf != NULL) 5781 kfree(serial_buf, M_TEMP); 5782 5783 if (changed != 0) { 5784 /* 5785 * Now that we have all the necessary 5786 * information to safely perform transfer 5787 * negotiations... Controllers don't perform 5788 * any negotiation or tagged queuing until 5789 * after the first XPT_SET_TRAN_SETTINGS ccb is 5790 * received. So, on a new device, just retreive 5791 * the user settings, and set them as the current 5792 * settings to set the device up. 5793 */ 5794 proberequestdefaultnegotiation(periph); 5795 xpt_release_ccb(done_ccb); 5796 5797 /* 5798 * Perform a TUR to allow the controller to 5799 * perform any necessary transfer negotiation. 5800 */ 5801 softc->action = PROBE_TUR_FOR_NEGOTIATION; 5802 xpt_schedule(periph, priority); 5803 return; 5804 } 5805 xpt_release_ccb(done_ccb); 5806 break; 5807 } 5808 case PROBE_TUR_FOR_NEGOTIATION: 5809 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { 5810 /* Don't wedge the queue */ 5811 xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, 5812 /*run_queue*/TRUE); 5813 } 5814 5815 path->device->flags &= ~CAM_DEV_UNCONFIGURED; 5816 xpt_reference_device(path->device); 5817 5818 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { 5819 /* Inform the XPT that a new device has been found */ 5820 done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; 5821 xpt_action(done_ccb); 5822 5823 xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb); 5824 } 5825 xpt_release_ccb(done_ccb); 5826 break; 5827 } 5828 done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); 5829 TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); 5830 done_ccb->ccb_h.status = CAM_REQ_CMP; 5831 xpt_done(done_ccb); 5832 if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { 5833 cam_periph_invalidate(periph); 5834 cam_periph_release(periph); 5835 } else { 5836 probeschedule(periph); 5837 } 5838 } 5839 5840 static void 5841 probecleanup(struct cam_periph *periph) 5842 { 5843 kfree(periph->softc, M_TEMP); 5844 } 5845 5846 static void 5847 xpt_find_quirk(struct cam_ed *device) 5848 { 5849 caddr_t match; 5850 5851 match = cam_quirkmatch((caddr_t)&device->inq_data, 5852 (caddr_t)xpt_quirk_table, 5853 sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), 5854 sizeof(*xpt_quirk_table), scsi_inquiry_match); 5855 5856 if (match == NULL) 5857 panic("xpt_find_quirk: device didn't match wildcard entry!!"); 5858 5859 device->quirk = (struct xpt_quirk_entry *)match; 5860 } 5861 5862 #ifdef CAM_NEW_TRAN_CODE 5863 5864 static void 5865 xpt_devise_transport(struct cam_path *path) 5866 { 5867 struct ccb_pathinq cpi; 5868 struct ccb_trans_settings cts; 5869 struct scsi_inquiry_data *inq_buf; 5870 5871 /* Get transport information from the SIM */ 5872 xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); 5873 cpi.ccb_h.func_code = XPT_PATH_INQ; 5874 xpt_action((union ccb *)&cpi); 5875 5876 inq_buf = NULL; 5877 if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) 5878 inq_buf = &path->device->inq_data; 5879 path->device->protocol = PROTO_SCSI; 5880 path->device->protocol_version = 5881 inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; 5882 path->device->transport = cpi.transport; 5883 path->device->transport_version = cpi.transport_version; 5884 5885 /* 5886 * Any device not using SPI3 features should 5887 * be considered SPI2 or lower. 5888 */ 5889 if (inq_buf != NULL) { 5890 if (path->device->transport == XPORT_SPI 5891 && (inq_buf->spi3data & SID_SPI_MASK) == 0 5892 && path->device->transport_version > 2) 5893 path->device->transport_version = 2; 5894 } else { 5895 struct cam_ed* otherdev; 5896 5897 for (otherdev = TAILQ_FIRST(&path->target->ed_entries); 5898 otherdev != NULL; 5899 otherdev = TAILQ_NEXT(otherdev, links)) { 5900 if (otherdev != path->device) 5901 break; 5902 } 5903 5904 if (otherdev != NULL) { 5905 /* 5906 * Initially assume the same versioning as 5907 * prior luns for this target. 5908 */ 5909 path->device->protocol_version = 5910 otherdev->protocol_version; 5911 path->device->transport_version = 5912 otherdev->transport_version; 5913 } else { 5914 /* Until we know better, opt for safty */ 5915 path->device->protocol_version = 2; 5916 if (path->device->transport == XPORT_SPI) 5917 path->device->transport_version = 2; 5918 else 5919 path->device->transport_version = 0; 5920 } 5921 } 5922 5923 /* 5924 * XXX 5925 * For a device compliant with SPC-2 we should be able 5926 * to determine the transport version supported by 5927 * scrutinizing the version descriptors in the 5928 * inquiry buffer. 5929 */ 5930 5931 /* Tell the controller what we think */ 5932 xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); 5933 cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; 5934 cts.type = CTS_TYPE_CURRENT_SETTINGS; 5935 cts.transport = path->device->transport; 5936 cts.transport_version = path->device->transport_version; 5937 cts.protocol = path->device->protocol; 5938 cts.protocol_version = path->device->protocol_version; 5939 cts.proto_specific.valid = 0; 5940 cts.xport_specific.valid = 0; 5941 xpt_action((union ccb *)&cts); 5942 } 5943 5944 static void 5945 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 5946 int async_update) 5947 { 5948 struct ccb_pathinq cpi; 5949 struct ccb_trans_settings cur_cts; 5950 struct ccb_trans_settings_scsi *scsi; 5951 struct ccb_trans_settings_scsi *cur_scsi; 5952 struct cam_sim *sim; 5953 struct scsi_inquiry_data *inq_data; 5954 5955 if (device == NULL) { 5956 cts->ccb_h.status = CAM_PATH_INVALID; 5957 xpt_done((union ccb *)cts); 5958 return; 5959 } 5960 5961 if (cts->protocol == PROTO_UNKNOWN 5962 || cts->protocol == PROTO_UNSPECIFIED) { 5963 cts->protocol = device->protocol; 5964 cts->protocol_version = device->protocol_version; 5965 } 5966 5967 if (cts->protocol_version == PROTO_VERSION_UNKNOWN 5968 || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) 5969 cts->protocol_version = device->protocol_version; 5970 5971 if (cts->protocol != device->protocol) { 5972 xpt_print_path(cts->ccb_h.path); 5973 printf("Uninitialized Protocol %x:%x?\n", 5974 cts->protocol, device->protocol); 5975 cts->protocol = device->protocol; 5976 } 5977 5978 if (cts->protocol_version > device->protocol_version) { 5979 if (bootverbose) { 5980 xpt_print_path(cts->ccb_h.path); 5981 printf("Down reving Protocol Version from %d to %d?\n", 5982 cts->protocol_version, device->protocol_version); 5983 } 5984 cts->protocol_version = device->protocol_version; 5985 } 5986 5987 if (cts->transport == XPORT_UNKNOWN 5988 || cts->transport == XPORT_UNSPECIFIED) { 5989 cts->transport = device->transport; 5990 cts->transport_version = device->transport_version; 5991 } 5992 5993 if (cts->transport_version == XPORT_VERSION_UNKNOWN 5994 || cts->transport_version == XPORT_VERSION_UNSPECIFIED) 5995 cts->transport_version = device->transport_version; 5996 5997 if (cts->transport != device->transport) { 5998 xpt_print_path(cts->ccb_h.path); 5999 printf("Uninitialized Transport %x:%x?\n", 6000 cts->transport, device->transport); 6001 cts->transport = device->transport; 6002 } 6003 6004 if (cts->transport_version > device->transport_version) { 6005 if (bootverbose) { 6006 xpt_print_path(cts->ccb_h.path); 6007 printf("Down reving Transport Version from %d to %d?\n", 6008 cts->transport_version, 6009 device->transport_version); 6010 } 6011 cts->transport_version = device->transport_version; 6012 } 6013 6014 sim = cts->ccb_h.path->bus->sim; 6015 6016 /* 6017 * Nothing more of interest to do unless 6018 * this is a device connected via the 6019 * SCSI protocol. 6020 */ 6021 if (cts->protocol != PROTO_SCSI) { 6022 if (async_update == FALSE) 6023 (*(sim->sim_action))(sim, (union ccb *)cts); 6024 return; 6025 } 6026 6027 inq_data = &device->inq_data; 6028 scsi = &cts->proto_specific.scsi; 6029 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6030 cpi.ccb_h.func_code = XPT_PATH_INQ; 6031 xpt_action((union ccb *)&cpi); 6032 6033 /* SCSI specific sanity checking */ 6034 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6035 || (inq_data->flags & SID_CmdQue) == 0 6036 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6037 || (device->quirk->mintags == 0)) { 6038 /* 6039 * Can't tag on hardware that doesn't support tags, 6040 * doesn't have it enabled, or has broken tag support. 6041 */ 6042 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6043 } 6044 6045 if (async_update == FALSE) { 6046 /* 6047 * Perform sanity checking against what the 6048 * controller and device can do. 6049 */ 6050 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6051 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6052 cur_cts.type = cts->type; 6053 xpt_action((union ccb *)&cur_cts); 6054 6055 cur_scsi = &cur_cts.proto_specific.scsi; 6056 if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { 6057 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6058 scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; 6059 } 6060 if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) 6061 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6062 } 6063 6064 /* SPI specific sanity checking */ 6065 if (cts->transport == XPORT_SPI 6066 && async_update == FALSE) { 6067 u_int spi3caps; 6068 struct ccb_trans_settings_spi *spi; 6069 struct ccb_trans_settings_spi *cur_spi; 6070 6071 spi = &cts->xport_specific.spi; 6072 6073 cur_spi = &cur_cts.xport_specific.spi; 6074 6075 /* Fill in any gaps in what the user gave us */ 6076 if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6077 spi->sync_period = cur_spi->sync_period; 6078 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) 6079 spi->sync_period = 0; 6080 if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6081 spi->sync_offset = cur_spi->sync_offset; 6082 if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) 6083 spi->sync_offset = 0; 6084 if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6085 spi->ppr_options = cur_spi->ppr_options; 6086 if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) 6087 spi->ppr_options = 0; 6088 if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6089 spi->bus_width = cur_spi->bus_width; 6090 if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) 6091 spi->bus_width = 0; 6092 if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { 6093 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6094 spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; 6095 } 6096 if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) 6097 spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; 6098 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6099 && (inq_data->flags & SID_Sync) == 0 6100 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6101 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6102 || (cts->sync_offset == 0) 6103 || (cts->sync_period == 0)) { 6104 /* Force async */ 6105 spi->sync_period = 0; 6106 spi->sync_offset = 0; 6107 } 6108 6109 switch (spi->bus_width) { 6110 case MSG_EXT_WDTR_BUS_32_BIT: 6111 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6112 || (inq_data->flags & SID_WBus32) != 0 6113 || cts->type == CTS_TYPE_USER_SETTINGS) 6114 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6115 break; 6116 /* Fall Through to 16-bit */ 6117 case MSG_EXT_WDTR_BUS_16_BIT: 6118 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6119 || (inq_data->flags & SID_WBus16) != 0 6120 || cts->type == CTS_TYPE_USER_SETTINGS) 6121 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6122 spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6123 break; 6124 } 6125 /* Fall Through to 8-bit */ 6126 default: /* New bus width?? */ 6127 case MSG_EXT_WDTR_BUS_8_BIT: 6128 /* All targets can do this */ 6129 spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6130 break; 6131 } 6132 6133 spi3caps = cpi.xport_specific.spi.ppr_options; 6134 if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6135 && cts->type == CTS_TYPE_CURRENT_SETTINGS) 6136 spi3caps &= inq_data->spi3data; 6137 6138 if ((spi3caps & SID_SPI_CLOCK_DT) == 0) 6139 spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; 6140 6141 if ((spi3caps & SID_SPI_IUS) == 0) 6142 spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; 6143 6144 if ((spi3caps & SID_SPI_QAS) == 0) 6145 spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; 6146 6147 /* No SPI Transfer settings are allowed unless we are wide */ 6148 if (spi->bus_width == 0) 6149 spi->ppr_options = 0; 6150 6151 if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { 6152 /* 6153 * Can't tag queue without disconnection. 6154 */ 6155 scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; 6156 scsi->valid |= CTS_SCSI_VALID_TQ; 6157 } 6158 6159 /* 6160 * If we are currently performing tagged transactions to 6161 * this device and want to change its negotiation parameters, 6162 * go non-tagged for a bit to give the controller a chance to 6163 * negotiate unhampered by tag messages. 6164 */ 6165 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6166 && (device->inq_flags & SID_CmdQue) != 0 6167 && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6168 && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| 6169 CTS_SPI_VALID_SYNC_OFFSET| 6170 CTS_SPI_VALID_BUS_WIDTH)) != 0) 6171 xpt_toggle_tags(cts->ccb_h.path); 6172 } 6173 6174 if (cts->type == CTS_TYPE_CURRENT_SETTINGS 6175 && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { 6176 int device_tagenb; 6177 6178 /* 6179 * If we are transitioning from tags to no-tags or 6180 * vice-versa, we need to carefully freeze and restart 6181 * the queue so that we don't overlap tagged and non-tagged 6182 * commands. We also temporarily stop tags if there is 6183 * a change in transfer negotiation settings to allow 6184 * "tag-less" negotiation. 6185 */ 6186 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6187 || (device->inq_flags & SID_CmdQue) != 0) 6188 device_tagenb = TRUE; 6189 else 6190 device_tagenb = FALSE; 6191 6192 if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 6193 && device_tagenb == FALSE) 6194 || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 6195 && device_tagenb == TRUE)) { 6196 6197 if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { 6198 /* 6199 * Delay change to use tags until after a 6200 * few commands have gone to this device so 6201 * the controller has time to perform transfer 6202 * negotiations without tagged messages getting 6203 * in the way. 6204 */ 6205 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6206 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6207 } else { 6208 struct ccb_relsim crs; 6209 6210 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6211 device->inq_flags &= ~SID_CmdQue; 6212 xpt_dev_ccbq_resize(cts->ccb_h.path, 6213 sim->max_dev_openings); 6214 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6215 device->tag_delay_count = 0; 6216 6217 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6218 /*priority*/1); 6219 crs.ccb_h.func_code = XPT_REL_SIMQ; 6220 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6221 crs.openings 6222 = crs.release_timeout 6223 = crs.qfrozen_cnt 6224 = 0; 6225 xpt_action((union ccb *)&crs); 6226 } 6227 } 6228 } 6229 if (async_update == FALSE) 6230 (*(sim->sim_action))(sim, (union ccb *)cts); 6231 } 6232 6233 #else /* CAM_NEW_TRAN_CODE */ 6234 6235 static void 6236 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, 6237 int async_update) 6238 { 6239 struct cam_sim *sim; 6240 int qfrozen; 6241 6242 sim = cts->ccb_h.path->bus->sim; 6243 if (async_update == FALSE) { 6244 struct scsi_inquiry_data *inq_data; 6245 struct ccb_pathinq cpi; 6246 struct ccb_trans_settings cur_cts; 6247 6248 if (device == NULL) { 6249 cts->ccb_h.status = CAM_PATH_INVALID; 6250 xpt_done((union ccb *)cts); 6251 return; 6252 } 6253 6254 /* 6255 * Perform sanity checking against what the 6256 * controller and device can do. 6257 */ 6258 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); 6259 cpi.ccb_h.func_code = XPT_PATH_INQ; 6260 xpt_action((union ccb *)&cpi); 6261 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); 6262 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 6263 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS; 6264 xpt_action((union ccb *)&cur_cts); 6265 inq_data = &device->inq_data; 6266 6267 /* Fill in any gaps in what the user gave us */ 6268 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0) 6269 cts->sync_period = cur_cts.sync_period; 6270 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0) 6271 cts->sync_offset = cur_cts.sync_offset; 6272 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0) 6273 cts->bus_width = cur_cts.bus_width; 6274 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) { 6275 cts->flags &= ~CCB_TRANS_DISC_ENB; 6276 cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB; 6277 } 6278 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) { 6279 cts->flags &= ~CCB_TRANS_TAG_ENB; 6280 cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB; 6281 } 6282 6283 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 6284 && (inq_data->flags & SID_Sync) == 0) 6285 || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) 6286 || (cts->sync_offset == 0) 6287 || (cts->sync_period == 0)) { 6288 /* Force async */ 6289 cts->sync_period = 0; 6290 cts->sync_offset = 0; 6291 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) { 6292 6293 if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0 6294 && cts->sync_period <= 0x9) { 6295 /* 6296 * Don't allow DT transmission rates if the 6297 * device does not support it. 6298 */ 6299 cts->sync_period = 0xa; 6300 } 6301 if ((inq_data->spi3data & SID_SPI_IUS) == 0 6302 && cts->sync_period <= 0x8) { 6303 /* 6304 * Don't allow PACE transmission rates 6305 * if the device does support packetized 6306 * transfers. 6307 */ 6308 cts->sync_period = 0x9; 6309 } 6310 } 6311 6312 switch (cts->bus_width) { 6313 case MSG_EXT_WDTR_BUS_32_BIT: 6314 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6315 || (inq_data->flags & SID_WBus32) != 0) 6316 && (cpi.hba_inquiry & PI_WIDE_32) != 0) 6317 break; 6318 /* Fall Through to 16-bit */ 6319 case MSG_EXT_WDTR_BUS_16_BIT: 6320 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 6321 || (inq_data->flags & SID_WBus16) != 0) 6322 && (cpi.hba_inquiry & PI_WIDE_16) != 0) { 6323 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT; 6324 break; 6325 } 6326 /* Fall Through to 8-bit */ 6327 default: /* New bus width?? */ 6328 case MSG_EXT_WDTR_BUS_8_BIT: 6329 /* All targets can do this */ 6330 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT; 6331 break; 6332 } 6333 6334 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) { 6335 /* 6336 * Can't tag queue without disconnection. 6337 */ 6338 cts->flags &= ~CCB_TRANS_TAG_ENB; 6339 cts->valid |= CCB_TRANS_TQ_VALID; 6340 } 6341 6342 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 6343 || (inq_data->flags & SID_CmdQue) == 0 6344 || (device->queue_flags & SCP_QUEUE_DQUE) != 0 6345 || (device->quirk->mintags == 0)) { 6346 /* 6347 * Can't tag on hardware that doesn't support, 6348 * doesn't have it enabled, or has broken tag support. 6349 */ 6350 cts->flags &= ~CCB_TRANS_TAG_ENB; 6351 } 6352 } 6353 6354 qfrozen = FALSE; 6355 if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) { 6356 int device_tagenb; 6357 6358 /* 6359 * If we are transitioning from tags to no-tags or 6360 * vice-versa, we need to carefully freeze and restart 6361 * the queue so that we don't overlap tagged and non-tagged 6362 * commands. We also temporarily stop tags if there is 6363 * a change in transfer negotiation settings to allow 6364 * "tag-less" negotiation. 6365 */ 6366 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6367 || (device->inq_flags & SID_CmdQue) != 0) 6368 device_tagenb = TRUE; 6369 else 6370 device_tagenb = FALSE; 6371 6372 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0 6373 && device_tagenb == FALSE) 6374 || ((cts->flags & CCB_TRANS_TAG_ENB) == 0 6375 && device_tagenb == TRUE)) { 6376 6377 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) { 6378 /* 6379 * Delay change to use tags until after a 6380 * few commands have gone to this device so 6381 * the controller has time to perform transfer 6382 * negotiations without tagged messages getting 6383 * in the way. 6384 */ 6385 device->tag_delay_count = CAM_TAG_DELAY_COUNT; 6386 device->flags |= CAM_DEV_TAG_AFTER_COUNT; 6387 } else { 6388 xpt_freeze_devq(cts->ccb_h.path, /*count*/1); 6389 qfrozen = TRUE; 6390 device->inq_flags &= ~SID_CmdQue; 6391 xpt_dev_ccbq_resize(cts->ccb_h.path, 6392 sim->max_dev_openings); 6393 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6394 device->tag_delay_count = 0; 6395 } 6396 } 6397 } 6398 6399 if (async_update == FALSE) { 6400 /* 6401 * If we are currently performing tagged transactions to 6402 * this device and want to change its negotiation parameters, 6403 * go non-tagged for a bit to give the controller a chance to 6404 * negotiate unhampered by tag messages. 6405 */ 6406 if ((device->inq_flags & SID_CmdQue) != 0 6407 && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID| 6408 CCB_TRANS_SYNC_OFFSET_VALID| 6409 CCB_TRANS_BUS_WIDTH_VALID)) != 0) 6410 xpt_toggle_tags(cts->ccb_h.path); 6411 6412 (*(sim->sim_action))(sim, (union ccb *)cts); 6413 } 6414 6415 if (qfrozen) { 6416 struct ccb_relsim crs; 6417 6418 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, 6419 /*priority*/1); 6420 crs.ccb_h.func_code = XPT_REL_SIMQ; 6421 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6422 crs.openings 6423 = crs.release_timeout 6424 = crs.qfrozen_cnt 6425 = 0; 6426 xpt_action((union ccb *)&crs); 6427 } 6428 } 6429 6430 6431 #endif /* CAM_NEW_TRAN_CODE */ 6432 6433 static void 6434 xpt_toggle_tags(struct cam_path *path) 6435 { 6436 struct cam_ed *dev; 6437 6438 /* 6439 * Give controllers a chance to renegotiate 6440 * before starting tag operations. We 6441 * "toggle" tagged queuing off then on 6442 * which causes the tag enable command delay 6443 * counter to come into effect. 6444 */ 6445 dev = path->device; 6446 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6447 || ((dev->inq_flags & SID_CmdQue) != 0 6448 && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { 6449 struct ccb_trans_settings cts; 6450 6451 xpt_setup_ccb(&cts.ccb_h, path, 1); 6452 #ifdef CAM_NEW_TRAN_CODE 6453 cts.protocol = PROTO_SCSI; 6454 cts.protocol_version = PROTO_VERSION_UNSPECIFIED; 6455 cts.transport = XPORT_UNSPECIFIED; 6456 cts.transport_version = XPORT_VERSION_UNSPECIFIED; 6457 cts.proto_specific.scsi.flags = 0; 6458 cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; 6459 #else /* CAM_NEW_TRAN_CODE */ 6460 cts.flags = 0; 6461 cts.valid = CCB_TRANS_TQ_VALID; 6462 #endif /* CAM_NEW_TRAN_CODE */ 6463 xpt_set_transfer_settings(&cts, path->device, 6464 /*async_update*/TRUE); 6465 #ifdef CAM_NEW_TRAN_CODE 6466 cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; 6467 #else /* CAM_NEW_TRAN_CODE */ 6468 cts.flags = CCB_TRANS_TAG_ENB; 6469 #endif /* CAM_NEW_TRAN_CODE */ 6470 xpt_set_transfer_settings(&cts, path->device, 6471 /*async_update*/TRUE); 6472 } 6473 } 6474 6475 static void 6476 xpt_start_tags(struct cam_path *path) 6477 { 6478 struct ccb_relsim crs; 6479 struct cam_ed *device; 6480 struct cam_sim *sim; 6481 int newopenings; 6482 6483 device = path->device; 6484 sim = path->bus->sim; 6485 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; 6486 xpt_freeze_devq(path, /*count*/1); 6487 device->inq_flags |= SID_CmdQue; 6488 newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings); 6489 xpt_dev_ccbq_resize(path, newopenings); 6490 xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); 6491 crs.ccb_h.func_code = XPT_REL_SIMQ; 6492 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; 6493 crs.openings 6494 = crs.release_timeout 6495 = crs.qfrozen_cnt 6496 = 0; 6497 xpt_action((union ccb *)&crs); 6498 } 6499 6500 static int busses_to_config; 6501 static int busses_to_reset; 6502 6503 static int 6504 xptconfigbuscountfunc(struct cam_eb *bus, void *arg) 6505 { 6506 if (bus->path_id != CAM_XPT_PATH_ID) { 6507 struct cam_path path; 6508 struct ccb_pathinq cpi; 6509 int can_negotiate; 6510 6511 busses_to_config++; 6512 xpt_compile_path(&path, NULL, bus->path_id, 6513 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); 6514 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); 6515 cpi.ccb_h.func_code = XPT_PATH_INQ; 6516 xpt_action((union ccb *)&cpi); 6517 can_negotiate = cpi.hba_inquiry; 6518 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6519 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 6520 && can_negotiate) 6521 busses_to_reset++; 6522 xpt_release_path(&path); 6523 } 6524 6525 return(1); 6526 } 6527 6528 static int 6529 xptconfigfunc(struct cam_eb *bus, void *arg) 6530 { 6531 struct cam_path *path; 6532 union ccb *work_ccb; 6533 6534 if (bus->path_id != CAM_XPT_PATH_ID) { 6535 cam_status status; 6536 int can_negotiate; 6537 6538 work_ccb = xpt_alloc_ccb(); 6539 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, 6540 CAM_TARGET_WILDCARD, 6541 CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ 6542 kprintf("xptconfigfunc: xpt_create_path failed with " 6543 "status %#x for bus %d\n", status, bus->path_id); 6544 kprintf("xptconfigfunc: halting bus configuration\n"); 6545 xpt_free_ccb(work_ccb); 6546 busses_to_config--; 6547 xpt_finishconfig(xpt_periph, NULL); 6548 return(0); 6549 } 6550 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6551 work_ccb->ccb_h.func_code = XPT_PATH_INQ; 6552 xpt_action(work_ccb); 6553 if (work_ccb->ccb_h.status != CAM_REQ_CMP) { 6554 kprintf("xptconfigfunc: CPI failed on bus %d " 6555 "with status %d\n", bus->path_id, 6556 work_ccb->ccb_h.status); 6557 xpt_finishconfig(xpt_periph, work_ccb); 6558 return(1); 6559 } 6560 6561 can_negotiate = work_ccb->cpi.hba_inquiry; 6562 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); 6563 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 6564 && (can_negotiate != 0)) { 6565 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); 6566 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6567 work_ccb->ccb_h.cbfcnp = NULL; 6568 CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, 6569 ("Resetting Bus\n")); 6570 xpt_action(work_ccb); 6571 xpt_finishconfig(xpt_periph, work_ccb); 6572 } else { 6573 /* Act as though we performed a successful BUS RESET */ 6574 work_ccb->ccb_h.func_code = XPT_RESET_BUS; 6575 xpt_finishconfig(xpt_periph, work_ccb); 6576 } 6577 } 6578 6579 return(1); 6580 } 6581 6582 static void 6583 xpt_config(void *arg) 6584 { 6585 /* 6586 * Now that interrupts are enabled, go find our devices 6587 */ 6588 6589 #ifdef CAMDEBUG 6590 /* Setup debugging flags and path */ 6591 #ifdef CAM_DEBUG_FLAGS 6592 cam_dflags = CAM_DEBUG_FLAGS; 6593 #else /* !CAM_DEBUG_FLAGS */ 6594 cam_dflags = CAM_DEBUG_NONE; 6595 #endif /* CAM_DEBUG_FLAGS */ 6596 #ifdef CAM_DEBUG_BUS 6597 if (cam_dflags != CAM_DEBUG_NONE) { 6598 if (xpt_create_path(&cam_dpath, xpt_periph, 6599 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, 6600 CAM_DEBUG_LUN) != CAM_REQ_CMP) { 6601 kprintf("xpt_config: xpt_create_path() failed for debug" 6602 " target %d:%d:%d, debugging disabled\n", 6603 CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); 6604 cam_dflags = CAM_DEBUG_NONE; 6605 } 6606 } else 6607 cam_dpath = NULL; 6608 #else /* !CAM_DEBUG_BUS */ 6609 cam_dpath = NULL; 6610 #endif /* CAM_DEBUG_BUS */ 6611 #endif /* CAMDEBUG */ 6612 6613 /* 6614 * Scan all installed busses. 6615 */ 6616 xpt_for_all_busses(xptconfigbuscountfunc, NULL); 6617 6618 if (busses_to_config == 0) { 6619 /* Call manually because we don't have any busses */ 6620 xpt_finishconfig(xpt_periph, NULL); 6621 } else { 6622 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) { 6623 kprintf("Waiting %d seconds for SCSI " 6624 "devices to settle\n", SCSI_DELAY/1000); 6625 } 6626 xpt_for_all_busses(xptconfigfunc, NULL); 6627 } 6628 } 6629 6630 /* 6631 * If the given device only has one peripheral attached to it, and if that 6632 * peripheral is the passthrough driver, announce it. This insures that the 6633 * user sees some sort of announcement for every peripheral in their system. 6634 */ 6635 static int 6636 xptpassannouncefunc(struct cam_ed *device, void *arg) 6637 { 6638 struct cam_periph *periph; 6639 int i; 6640 6641 for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; 6642 periph = SLIST_NEXT(periph, periph_links), i++); 6643 6644 periph = SLIST_FIRST(&device->periphs); 6645 if ((i == 1) 6646 && (strncmp(periph->periph_name, "pass", 4) == 0)) 6647 xpt_announce_periph(periph, NULL); 6648 6649 return(1); 6650 } 6651 6652 static void 6653 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) 6654 { 6655 struct periph_driver **p_drv; 6656 int i; 6657 6658 if (done_ccb != NULL) { 6659 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, 6660 ("xpt_finishconfig\n")); 6661 switch(done_ccb->ccb_h.func_code) { 6662 case XPT_RESET_BUS: 6663 if (done_ccb->ccb_h.status == CAM_REQ_CMP) { 6664 done_ccb->ccb_h.func_code = XPT_SCAN_BUS; 6665 done_ccb->ccb_h.cbfcnp = xpt_finishconfig; 6666 xpt_action(done_ccb); 6667 return; 6668 } 6669 /* FALLTHROUGH */ 6670 case XPT_SCAN_BUS: 6671 default: 6672 xpt_free_path(done_ccb->ccb_h.path); 6673 busses_to_config--; 6674 break; 6675 } 6676 } 6677 6678 if (busses_to_config == 0) { 6679 /* Register all the peripheral drivers */ 6680 /* XXX This will have to change when we have loadable modules */ 6681 p_drv = periph_drivers; 6682 for (i = 0; p_drv[i] != NULL; i++) { 6683 (*p_drv[i]->init)(); 6684 } 6685 6686 /* 6687 * Check for devices with no "standard" peripheral driver 6688 * attached. For any devices like that, announce the 6689 * passthrough driver so the user will see something. 6690 */ 6691 xpt_for_all_devices(xptpassannouncefunc, NULL); 6692 6693 /* Release our hook so that the boot can continue. */ 6694 config_intrhook_disestablish(xpt_config_hook); 6695 kfree(xpt_config_hook, M_TEMP); 6696 xpt_config_hook = NULL; 6697 } 6698 if (done_ccb != NULL) 6699 xpt_free_ccb(done_ccb); 6700 } 6701 6702 static void 6703 xptaction(struct cam_sim *sim, union ccb *work_ccb) 6704 { 6705 CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); 6706 6707 switch (work_ccb->ccb_h.func_code) { 6708 /* Common cases first */ 6709 case XPT_PATH_INQ: /* Path routing inquiry */ 6710 { 6711 struct ccb_pathinq *cpi; 6712 6713 cpi = &work_ccb->cpi; 6714 cpi->version_num = 1; /* XXX??? */ 6715 cpi->hba_inquiry = 0; 6716 cpi->target_sprt = 0; 6717 cpi->hba_misc = 0; 6718 cpi->hba_eng_cnt = 0; 6719 cpi->max_target = 0; 6720 cpi->max_lun = 0; 6721 cpi->initiator_id = 0; 6722 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 6723 strncpy(cpi->hba_vid, "", HBA_IDLEN); 6724 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); 6725 cpi->unit_number = sim->unit_number; 6726 cpi->bus_id = sim->bus_id; 6727 cpi->base_transfer_speed = 0; 6728 #ifdef CAM_NEW_TRAN_CODE 6729 cpi->protocol = PROTO_UNSPECIFIED; 6730 cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; 6731 cpi->transport = XPORT_UNSPECIFIED; 6732 cpi->transport_version = XPORT_VERSION_UNSPECIFIED; 6733 #endif /* CAM_NEW_TRAN_CODE */ 6734 cpi->ccb_h.status = CAM_REQ_CMP; 6735 xpt_done(work_ccb); 6736 break; 6737 } 6738 default: 6739 work_ccb->ccb_h.status = CAM_REQ_INVALID; 6740 xpt_done(work_ccb); 6741 break; 6742 } 6743 } 6744 6745 /* 6746 * The xpt as a "controller" has no interrupt sources, so polling 6747 * is a no-op. 6748 */ 6749 static void 6750 xptpoll(struct cam_sim *sim) 6751 { 6752 } 6753 6754 /* 6755 * Should only be called by the machine interrupt dispatch routines, 6756 * so put these prototypes here instead of in the header. 6757 */ 6758 6759 static void 6760 swi_camnet(void *arg, void *frame) 6761 { 6762 camisr(&cam_netq); 6763 } 6764 6765 static void 6766 swi_cambio(void *arg, void *frame) 6767 { 6768 camisr(&cam_bioq); 6769 } 6770 6771 static void 6772 camisr(cam_isrq_t *queue) 6773 { 6774 struct ccb_hdr *ccb_h; 6775 6776 crit_enter(); 6777 while ((ccb_h = TAILQ_FIRST(queue)) != NULL) { 6778 int runq; 6779 6780 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe); 6781 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; 6782 splz(); 6783 6784 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, 6785 ("camisr\n")); 6786 6787 runq = FALSE; 6788 6789 if (ccb_h->flags & CAM_HIGH_POWER) { 6790 struct highpowerlist *hphead; 6791 struct cam_ed *device; 6792 union ccb *send_ccb; 6793 6794 hphead = &highpowerq; 6795 6796 send_ccb = (union ccb *)STAILQ_FIRST(hphead); 6797 6798 /* 6799 * Increment the count since this command is done. 6800 */ 6801 num_highpower++; 6802 6803 /* 6804 * Any high powered commands queued up? 6805 */ 6806 if (send_ccb != NULL) { 6807 device = send_ccb->ccb_h.path->device; 6808 6809 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); 6810 6811 xpt_release_devq(send_ccb->ccb_h.path, 6812 /*count*/1, /*runqueue*/TRUE); 6813 } 6814 } 6815 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { 6816 struct cam_ed *dev; 6817 6818 dev = ccb_h->path->device; 6819 6820 cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); 6821 6822 if (ccb_h->path->bus->sim->devq) { 6823 ccb_h->path->bus->sim->devq->send_active--; 6824 ccb_h->path->bus->sim->devq->send_openings++; 6825 } 6826 6827 if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 6828 && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) 6829 || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 6830 && (dev->ccbq.dev_active == 0))) { 6831 6832 xpt_release_devq(ccb_h->path, /*count*/1, 6833 /*run_queue*/TRUE); 6834 } 6835 6836 if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 6837 && (--dev->tag_delay_count == 0)) 6838 xpt_start_tags(ccb_h->path); 6839 6840 if ((dev->ccbq.queue.entries > 0) 6841 && (dev->qfrozen_cnt == 0) 6842 && (device_is_send_queued(dev) == 0)) { 6843 runq = xpt_schedule_dev_sendq(ccb_h->path->bus, 6844 dev); 6845 } 6846 } 6847 6848 if (ccb_h->status & CAM_RELEASE_SIMQ) { 6849 xpt_release_simq(ccb_h->path->bus->sim, 6850 /*run_queue*/TRUE); 6851 ccb_h->status &= ~CAM_RELEASE_SIMQ; 6852 runq = FALSE; 6853 } 6854 6855 if ((ccb_h->flags & CAM_DEV_QFRZDIS) 6856 && (ccb_h->status & CAM_DEV_QFRZN)) { 6857 xpt_release_devq(ccb_h->path, /*count*/1, 6858 /*run_queue*/TRUE); 6859 ccb_h->status &= ~CAM_DEV_QFRZN; 6860 } else if (runq) { 6861 xpt_run_dev_sendq(ccb_h->path->bus); 6862 } 6863 6864 /* Call the peripheral driver's callback */ 6865 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); 6866 } 6867 crit_exit(); 6868 } 6869