| 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 | */ |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/systm.h> |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/malloc.h> |
| 35 | #include <sys/kernel.h> |
| 36 | #include <sys/time.h> |
| 37 | #include <sys/conf.h> |
| 38 | #include <sys/device.h> |
| 39 | #include <sys/fcntl.h> |
| 40 | #include <sys/md5.h> |
| 41 | #include <sys/devicestat.h> |
| 42 | #include <sys/interrupt.h> |
| 43 | #include <sys/sbuf.h> |
| 44 | #include <sys/taskqueue.h> |
| 45 | #include <sys/bus.h> |
| 46 | #include <sys/thread.h> |
| 47 | #include <sys/lock.h> |
| 48 | #include <sys/spinlock.h> |
| 49 | |
| 50 | #include <sys/thread2.h> |
| 51 | #include <sys/spinlock2.h> |
| 52 | #include <sys/mplock2.h> |
| 53 | |
| 54 | #include <machine/clock.h> |
| 55 | #include <machine/stdarg.h> |
| 56 | |
| 57 | #include "cam.h" |
| 58 | #include "cam_ccb.h" |
| 59 | #include "cam_periph.h" |
| 60 | #include "cam_sim.h" |
| 61 | #include "cam_xpt.h" |
| 62 | #include "cam_xpt_sim.h" |
| 63 | #include "cam_xpt_periph.h" |
| 64 | #include "cam_debug.h" |
| 65 | |
| 66 | #include "scsi/scsi_all.h" |
| 67 | #include "scsi/scsi_message.h" |
| 68 | #include "scsi/scsi_pass.h" |
| 69 | #include <sys/kthread.h> |
| 70 | #include "opt_cam.h" |
| 71 | |
| 72 | /* Datastructures internal to the xpt layer */ |
| 73 | MALLOC_DEFINE(M_CAMXPT, "CAM XPT", "CAM XPT buffers"); |
| 74 | |
| 75 | /* Object for defering XPT actions to a taskqueue */ |
| 76 | struct xpt_task { |
| 77 | struct task task; |
| 78 | void *data1; |
| 79 | uintptr_t data2; |
| 80 | }; |
| 81 | |
| 82 | /* |
| 83 | * Definition of an async handler callback block. These are used to add |
| 84 | * SIMs and peripherals to the async callback lists. |
| 85 | */ |
| 86 | struct async_node { |
| 87 | SLIST_ENTRY(async_node) links; |
| 88 | u_int32_t event_enable; /* Async Event enables */ |
| 89 | void (*callback)(void *arg, u_int32_t code, |
| 90 | struct cam_path *path, void *args); |
| 91 | void *callback_arg; |
| 92 | }; |
| 93 | |
| 94 | SLIST_HEAD(async_list, async_node); |
| 95 | SLIST_HEAD(periph_list, cam_periph); |
| 96 | |
| 97 | /* |
| 98 | * This is the maximum number of high powered commands (e.g. start unit) |
| 99 | * that can be outstanding at a particular time. |
| 100 | */ |
| 101 | #ifndef CAM_MAX_HIGHPOWER |
| 102 | #define CAM_MAX_HIGHPOWER 4 |
| 103 | #endif |
| 104 | |
| 105 | /* |
| 106 | * Structure for queueing a device in a run queue. |
| 107 | * There is one run queue for allocating new ccbs, |
| 108 | * and another for sending ccbs to the controller. |
| 109 | */ |
| 110 | struct cam_ed_qinfo { |
| 111 | cam_pinfo pinfo; |
| 112 | struct cam_ed *device; |
| 113 | }; |
| 114 | |
| 115 | /* |
| 116 | * The CAM EDT (Existing Device Table) contains the device information for |
| 117 | * all devices for all busses in the system. The table contains a |
| 118 | * cam_ed structure for each device on the bus. |
| 119 | */ |
| 120 | struct cam_ed { |
| 121 | TAILQ_ENTRY(cam_ed) links; |
| 122 | struct cam_ed_qinfo alloc_ccb_entry; |
| 123 | struct cam_ed_qinfo send_ccb_entry; |
| 124 | struct cam_et *target; |
| 125 | struct cam_sim *sim; |
| 126 | lun_id_t lun_id; |
| 127 | struct camq drvq; /* |
| 128 | * Queue of type drivers wanting to do |
| 129 | * work on this device. |
| 130 | */ |
| 131 | struct cam_ccbq ccbq; /* Queue of pending ccbs */ |
| 132 | struct async_list asyncs; /* Async callback info for this B/T/L */ |
| 133 | struct periph_list periphs; /* All attached devices */ |
| 134 | u_int generation; /* Generation number */ |
| 135 | struct cam_periph *owner; /* Peripheral driver's ownership tag */ |
| 136 | struct xpt_quirk_entry *quirk; /* Oddities about this device */ |
| 137 | /* Storage for the inquiry data */ |
| 138 | cam_proto protocol; |
| 139 | u_int protocol_version; |
| 140 | cam_xport transport; |
| 141 | u_int transport_version; |
| 142 | struct scsi_inquiry_data inq_data; |
| 143 | u_int8_t inq_flags; /* |
| 144 | * Current settings for inquiry flags. |
| 145 | * This allows us to override settings |
| 146 | * like disconnection and tagged |
| 147 | * queuing for a device. |
| 148 | */ |
| 149 | u_int8_t queue_flags; /* Queue flags from the control page */ |
| 150 | u_int8_t serial_num_len; |
| 151 | u_int8_t *serial_num; |
| 152 | u_int32_t qfrozen_cnt; |
| 153 | u_int32_t flags; |
| 154 | #define CAM_DEV_UNCONFIGURED 0x01 |
| 155 | #define CAM_DEV_REL_TIMEOUT_PENDING 0x02 |
| 156 | #define CAM_DEV_REL_ON_COMPLETE 0x04 |
| 157 | #define CAM_DEV_REL_ON_QUEUE_EMPTY 0x08 |
| 158 | #define CAM_DEV_RESIZE_QUEUE_NEEDED 0x10 |
| 159 | #define CAM_DEV_TAG_AFTER_COUNT 0x20 |
| 160 | #define CAM_DEV_INQUIRY_DATA_VALID 0x40 |
| 161 | #define CAM_DEV_IN_DV 0x80 |
| 162 | #define CAM_DEV_DV_HIT_BOTTOM 0x100 |
| 163 | u_int32_t tag_delay_count; |
| 164 | #define CAM_TAG_DELAY_COUNT 5 |
| 165 | u_int32_t tag_saved_openings; |
| 166 | u_int32_t refcount; |
| 167 | struct callout callout; |
| 168 | }; |
| 169 | |
| 170 | /* |
| 171 | * Each target is represented by an ET (Existing Target). These |
| 172 | * entries are created when a target is successfully probed with an |
| 173 | * identify, and removed when a device fails to respond after a number |
| 174 | * of retries, or a bus rescan finds the device missing. |
| 175 | */ |
| 176 | struct cam_et { |
| 177 | TAILQ_HEAD(, cam_ed) ed_entries; |
| 178 | TAILQ_ENTRY(cam_et) links; |
| 179 | struct cam_eb *bus; |
| 180 | target_id_t target_id; |
| 181 | u_int32_t refcount; |
| 182 | u_int generation; |
| 183 | struct timeval last_reset; /* uptime of last reset */ |
| 184 | }; |
| 185 | |
| 186 | /* |
| 187 | * Each bus is represented by an EB (Existing Bus). These entries |
| 188 | * are created by calls to xpt_bus_register and deleted by calls to |
| 189 | * xpt_bus_deregister. |
| 190 | */ |
| 191 | struct cam_eb { |
| 192 | TAILQ_HEAD(, cam_et) et_entries; |
| 193 | TAILQ_ENTRY(cam_eb) links; |
| 194 | path_id_t path_id; |
| 195 | struct cam_sim *sim; |
| 196 | struct timeval last_reset; /* uptime of last reset */ |
| 197 | u_int32_t flags; |
| 198 | #define CAM_EB_RUNQ_SCHEDULED 0x01 |
| 199 | u_int32_t refcount; |
| 200 | u_int generation; |
| 201 | int counted_to_config; /* busses_to_config */ |
| 202 | }; |
| 203 | |
| 204 | struct cam_path { |
| 205 | struct cam_periph *periph; |
| 206 | struct cam_eb *bus; |
| 207 | struct cam_et *target; |
| 208 | struct cam_ed *device; |
| 209 | }; |
| 210 | |
| 211 | struct xpt_quirk_entry { |
| 212 | struct scsi_inquiry_pattern inq_pat; |
| 213 | u_int8_t quirks; |
| 214 | #define CAM_QUIRK_NOLUNS 0x01 |
| 215 | #define CAM_QUIRK_NOSERIAL 0x02 |
| 216 | #define CAM_QUIRK_HILUNS 0x04 |
| 217 | #define CAM_QUIRK_NOHILUNS 0x08 |
| 218 | u_int mintags; |
| 219 | u_int maxtags; |
| 220 | }; |
| 221 | |
| 222 | static int cam_srch_hi = 0; |
| 223 | TUNABLE_INT("kern.cam.cam_srch_hi", &cam_srch_hi); |
| 224 | static int sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS); |
| 225 | SYSCTL_PROC(_kern_cam, OID_AUTO, cam_srch_hi, CTLTYPE_INT|CTLFLAG_RW, 0, 0, |
| 226 | sysctl_cam_search_luns, "I", |
| 227 | "allow search above LUN 7 for SCSI3 and greater devices"); |
| 228 | |
| 229 | #define CAM_SCSI2_MAXLUN 8 |
| 230 | /* |
| 231 | * If we're not quirked to search <= the first 8 luns |
| 232 | * and we are either quirked to search above lun 8, |
| 233 | * or we're > SCSI-2 and we've enabled hilun searching, |
| 234 | * or we're > SCSI-2 and the last lun was a success, |
| 235 | * we can look for luns above lun 8. |
| 236 | */ |
| 237 | #define CAN_SRCH_HI_SPARSE(dv) \ |
| 238 | (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ |
| 239 | && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ |
| 240 | || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2 && cam_srch_hi))) |
| 241 | |
| 242 | #define CAN_SRCH_HI_DENSE(dv) \ |
| 243 | (((dv->quirk->quirks & CAM_QUIRK_NOHILUNS) == 0) \ |
| 244 | && ((dv->quirk->quirks & CAM_QUIRK_HILUNS) \ |
| 245 | || (SID_ANSI_REV(&dv->inq_data) > SCSI_REV_2))) |
| 246 | |
| 247 | typedef enum { |
| 248 | XPT_FLAG_OPEN = 0x01 |
| 249 | } xpt_flags; |
| 250 | |
| 251 | struct xpt_softc { |
| 252 | xpt_flags flags; |
| 253 | u_int32_t xpt_generation; |
| 254 | |
| 255 | /* number of high powered commands that can go through right now */ |
| 256 | STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq; |
| 257 | int num_highpower; |
| 258 | |
| 259 | /* queue for handling async rescan requests. */ |
| 260 | TAILQ_HEAD(, ccb_hdr) ccb_scanq; |
| 261 | int ccb_scanq_running; |
| 262 | |
| 263 | /* Registered busses */ |
| 264 | TAILQ_HEAD(,cam_eb) xpt_busses; |
| 265 | u_int bus_generation; |
| 266 | |
| 267 | struct intr_config_hook *xpt_config_hook; |
| 268 | |
| 269 | struct lock xpt_topo_lock; |
| 270 | struct lock xpt_lock; |
| 271 | }; |
| 272 | |
| 273 | static const char quantum[] = "QUANTUM"; |
| 274 | static const char sony[] = "SONY"; |
| 275 | static const char west_digital[] = "WDIGTL"; |
| 276 | static const char samsung[] = "SAMSUNG"; |
| 277 | static const char seagate[] = "SEAGATE"; |
| 278 | static const char microp[] = "MICROP"; |
| 279 | |
| 280 | static struct xpt_quirk_entry xpt_quirk_table[] = |
| 281 | { |
| 282 | { |
| 283 | /* Reports QUEUE FULL for temporary resource shortages */ |
| 284 | { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" }, |
| 285 | /*quirks*/0, /*mintags*/24, /*maxtags*/32 |
| 286 | }, |
| 287 | { |
| 288 | /* Reports QUEUE FULL for temporary resource shortages */ |
| 289 | { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" }, |
| 290 | /*quirks*/0, /*mintags*/24, /*maxtags*/32 |
| 291 | }, |
| 292 | { |
| 293 | /* Reports QUEUE FULL for temporary resource shortages */ |
| 294 | { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" }, |
| 295 | /*quirks*/0, /*mintags*/24, /*maxtags*/32 |
| 296 | }, |
| 297 | { |
| 298 | /* Broken tagged queuing drive */ |
| 299 | { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" }, |
| 300 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 301 | }, |
| 302 | { |
| 303 | /* Broken tagged queuing drive */ |
| 304 | { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" }, |
| 305 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 306 | }, |
| 307 | { |
| 308 | /* Broken tagged queuing drive */ |
| 309 | { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" }, |
| 310 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 311 | }, |
| 312 | { |
| 313 | /* |
| 314 | * Unfortunately, the Quantum Atlas III has the same |
| 315 | * problem as the Atlas II drives above. |
| 316 | * Reported by: "Johan Granlund" <johan@granlund.nu> |
| 317 | * |
| 318 | * For future reference, the drive with the problem was: |
| 319 | * QUANTUM QM39100TD-SW N1B0 |
| 320 | * |
| 321 | * It's possible that Quantum will fix the problem in later |
| 322 | * firmware revisions. If that happens, the quirk entry |
| 323 | * will need to be made specific to the firmware revisions |
| 324 | * with the problem. |
| 325 | * |
| 326 | */ |
| 327 | /* Reports QUEUE FULL for temporary resource shortages */ |
| 328 | { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" }, |
| 329 | /*quirks*/0, /*mintags*/24, /*maxtags*/32 |
| 330 | }, |
| 331 | { |
| 332 | /* |
| 333 | * 18 Gig Atlas III, same problem as the 9G version. |
| 334 | * Reported by: Andre Albsmeier |
| 335 | * <andre.albsmeier@mchp.siemens.de> |
| 336 | * |
| 337 | * For future reference, the drive with the problem was: |
| 338 | * QUANTUM QM318000TD-S N491 |
| 339 | */ |
| 340 | /* Reports QUEUE FULL for temporary resource shortages */ |
| 341 | { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" }, |
| 342 | /*quirks*/0, /*mintags*/24, /*maxtags*/32 |
| 343 | }, |
| 344 | { |
| 345 | /* |
| 346 | * Broken tagged queuing drive |
| 347 | * Reported by: Bret Ford <bford@uop.cs.uop.edu> |
| 348 | * and: Martin Renters <martin@tdc.on.ca> |
| 349 | */ |
| 350 | { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" }, |
| 351 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 352 | }, |
| 353 | /* |
| 354 | * The Seagate Medalist Pro drives have very poor write |
| 355 | * performance with anything more than 2 tags. |
| 356 | * |
| 357 | * Reported by: Paul van der Zwan <paulz@trantor.xs4all.nl> |
| 358 | * Drive: <SEAGATE ST36530N 1444> |
| 359 | * |
| 360 | * Reported by: Jeremy Lea <reg@shale.csir.co.za> |
| 361 | * Drive: <SEAGATE ST34520W 1281> |
| 362 | * |
| 363 | * No one has actually reported that the 9G version |
| 364 | * (ST39140*) of the Medalist Pro has the same problem, but |
| 365 | * we're assuming that it does because the 4G and 6.5G |
| 366 | * versions of the drive are broken. |
| 367 | */ |
| 368 | { |
| 369 | { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"}, |
| 370 | /*quirks*/0, /*mintags*/2, /*maxtags*/2 |
| 371 | }, |
| 372 | { |
| 373 | { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"}, |
| 374 | /*quirks*/0, /*mintags*/2, /*maxtags*/2 |
| 375 | }, |
| 376 | { |
| 377 | { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"}, |
| 378 | /*quirks*/0, /*mintags*/2, /*maxtags*/2 |
| 379 | }, |
| 380 | { |
| 381 | /* |
| 382 | * Slow when tagged queueing is enabled. Write performance |
| 383 | * steadily drops off with more and more concurrent |
| 384 | * transactions. Best sequential write performance with |
| 385 | * tagged queueing turned off and write caching turned on. |
| 386 | * |
| 387 | * PR: kern/10398 |
| 388 | * Submitted by: Hideaki Okada <hokada@isl.melco.co.jp> |
| 389 | * Drive: DCAS-34330 w/ "S65A" firmware. |
| 390 | * |
| 391 | * The drive with the problem had the "S65A" firmware |
| 392 | * revision, and has also been reported (by Stephen J. |
| 393 | * Roznowski <sjr@home.net>) for a drive with the "S61A" |
| 394 | * firmware revision. |
| 395 | * |
| 396 | * Although no one has reported problems with the 2 gig |
| 397 | * version of the DCAS drive, the assumption is that it |
| 398 | * has the same problems as the 4 gig version. Therefore |
| 399 | * this quirk entries disables tagged queueing for all |
| 400 | * DCAS drives. |
| 401 | */ |
| 402 | { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" }, |
| 403 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 404 | }, |
| 405 | { |
| 406 | /* Broken tagged queuing drive */ |
| 407 | { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" }, |
| 408 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 409 | }, |
| 410 | { |
| 411 | /* Broken tagged queuing drive */ |
| 412 | { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" }, |
| 413 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 414 | }, |
| 415 | { |
| 416 | /* This does not support other than LUN 0 */ |
| 417 | { T_DIRECT, SIP_MEDIA_FIXED, "VMware*", "*", "*" }, |
| 418 | CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 |
| 419 | }, |
| 420 | { |
| 421 | /* |
| 422 | * Broken tagged queuing drive. |
| 423 | * Submitted by: |
| 424 | * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp> |
| 425 | * in PR kern/9535 |
| 426 | */ |
| 427 | { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" }, |
| 428 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 429 | }, |
| 430 | { |
| 431 | /* |
| 432 | * Slow when tagged queueing is enabled. (1.5MB/sec versus |
| 433 | * 8MB/sec.) |
| 434 | * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> |
| 435 | * Best performance with these drives is achieved with |
| 436 | * tagged queueing turned off, and write caching turned on. |
| 437 | */ |
| 438 | { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" }, |
| 439 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 440 | }, |
| 441 | { |
| 442 | /* |
| 443 | * Slow when tagged queueing is enabled. (1.5MB/sec versus |
| 444 | * 8MB/sec.) |
| 445 | * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu> |
| 446 | * Best performance with these drives is achieved with |
| 447 | * tagged queueing turned off, and write caching turned on. |
| 448 | */ |
| 449 | { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" }, |
| 450 | /*quirks*/0, /*mintags*/0, /*maxtags*/0 |
| 451 | }, |
| 452 | { |
| 453 | /* |
| 454 | * Doesn't handle queue full condition correctly, |
| 455 | * so we need to limit maxtags to what the device |
| 456 | * can handle instead of determining this automatically. |
| 457 | */ |
| 458 | { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" }, |
| 459 | /*quirks*/0, /*mintags*/2, /*maxtags*/32 |
| 460 | }, |
| 461 | { |
| 462 | /* Really only one LUN */ |
| 463 | { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" }, |
| 464 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 465 | }, |
| 466 | { |
| 467 | /* I can't believe we need a quirk for DPT volumes. */ |
| 468 | { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" }, |
| 469 | CAM_QUIRK_NOLUNS, |
| 470 | /*mintags*/0, /*maxtags*/255 |
| 471 | }, |
| 472 | { |
| 473 | /* |
| 474 | * Many Sony CDROM drives don't like multi-LUN probing. |
| 475 | */ |
| 476 | { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" }, |
| 477 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 478 | }, |
| 479 | { |
| 480 | /* |
| 481 | * This drive doesn't like multiple LUN probing. |
| 482 | * Submitted by: Parag Patel <parag@cgt.com> |
| 483 | */ |
| 484 | { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R CDU9*", "*" }, |
| 485 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 486 | }, |
| 487 | { |
| 488 | { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" }, |
| 489 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 490 | }, |
| 491 | { |
| 492 | /* |
| 493 | * The 8200 doesn't like multi-lun probing, and probably |
| 494 | * don't like serial number requests either. |
| 495 | */ |
| 496 | { |
| 497 | T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", |
| 498 | "EXB-8200*", "*" |
| 499 | }, |
| 500 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 501 | }, |
| 502 | { |
| 503 | /* |
| 504 | * Let's try the same as above, but for a drive that says |
| 505 | * it's an IPL-6860 but is actually an EXB 8200. |
| 506 | */ |
| 507 | { |
| 508 | T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE", |
| 509 | "IPL-6860*", "*" |
| 510 | }, |
| 511 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 512 | }, |
| 513 | { |
| 514 | /* |
| 515 | * These Hitachi drives don't like multi-lun probing. |
| 516 | * The PR submitter has a DK319H, but says that the Linux |
| 517 | * kernel has a similar work-around for the DK312 and DK314, |
| 518 | * so all DK31* drives are quirked here. |
| 519 | * PR: misc/18793 |
| 520 | * Submitted by: Paul Haddad <paul@pth.com> |
| 521 | */ |
| 522 | { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" }, |
| 523 | CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255 |
| 524 | }, |
| 525 | { |
| 526 | /* |
| 527 | * The Hitachi CJ series with J8A8 firmware apparantly has |
| 528 | * problems with tagged commands. |
| 529 | * PR: 23536 |
| 530 | * Reported by: amagai@nue.org |
| 531 | */ |
| 532 | { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK32CJ*", "J8A8" }, |
| 533 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 534 | }, |
| 535 | { |
| 536 | /* |
| 537 | * These are the large storage arrays. |
| 538 | * Submitted by: William Carrel <william.carrel@infospace.com> |
| 539 | */ |
| 540 | { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "OPEN*", "*" }, |
| 541 | CAM_QUIRK_HILUNS, 2, 1024 |
| 542 | }, |
| 543 | { |
| 544 | /* |
| 545 | * This old revision of the TDC3600 is also SCSI-1, and |
| 546 | * hangs upon serial number probing. |
| 547 | */ |
| 548 | { |
| 549 | T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG", |
| 550 | " TDC 3600", "U07:" |
| 551 | }, |
| 552 | CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0 |
| 553 | }, |
| 554 | { |
| 555 | /* |
| 556 | * Would repond to all LUNs if asked for. |
| 557 | */ |
| 558 | { |
| 559 | T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER", |
| 560 | "CP150", "*" |
| 561 | }, |
| 562 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 563 | }, |
| 564 | { |
| 565 | /* |
| 566 | * Would repond to all LUNs if asked for. |
| 567 | */ |
| 568 | { |
| 569 | T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY", |
| 570 | "96X2*", "*" |
| 571 | }, |
| 572 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 573 | }, |
| 574 | { |
| 575 | /* Submitted by: Matthew Dodd <winter@jurai.net> */ |
| 576 | { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" }, |
| 577 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 578 | }, |
| 579 | { |
| 580 | /* Submitted by: Matthew Dodd <winter@jurai.net> */ |
| 581 | { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" }, |
| 582 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 583 | }, |
| 584 | { |
| 585 | /* TeraSolutions special settings for TRC-22 RAID */ |
| 586 | { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" }, |
| 587 | /*quirks*/0, /*mintags*/55, /*maxtags*/255 |
| 588 | }, |
| 589 | { |
| 590 | /* Veritas Storage Appliance */ |
| 591 | { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" }, |
| 592 | CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024 |
| 593 | }, |
| 594 | { |
| 595 | /* |
| 596 | * Would respond to all LUNs. Device type and removable |
| 597 | * flag are jumper-selectable. |
| 598 | */ |
| 599 | { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix", |
| 600 | "Tahiti 1", "*" |
| 601 | }, |
| 602 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 603 | }, |
| 604 | { |
| 605 | /* EasyRAID E5A aka. areca ARC-6010 */ |
| 606 | { T_DIRECT, SIP_MEDIA_FIXED, "easyRAID", "*", "*" }, |
| 607 | CAM_QUIRK_NOHILUNS, /*mintags*/2, /*maxtags*/255 |
| 608 | }, |
| 609 | { |
| 610 | { T_ENCLOSURE, SIP_MEDIA_FIXED, "DP", "BACKPLANE", "*" }, |
| 611 | CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0 |
| 612 | }, |
| 613 | { |
| 614 | /* Default tagged queuing parameters for all devices */ |
| 615 | { |
| 616 | T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, |
| 617 | /*vendor*/"*", /*product*/"*", /*revision*/"*" |
| 618 | }, |
| 619 | /*quirks*/0, /*mintags*/2, /*maxtags*/255 |
| 620 | }, |
| 621 | }; |
| 622 | |
| 623 | static const int xpt_quirk_table_size = |
| 624 | sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table); |
| 625 | |
| 626 | typedef enum { |
| 627 | DM_RET_COPY = 0x01, |
| 628 | DM_RET_FLAG_MASK = 0x0f, |
| 629 | DM_RET_NONE = 0x00, |
| 630 | DM_RET_STOP = 0x10, |
| 631 | DM_RET_DESCEND = 0x20, |
| 632 | DM_RET_ERROR = 0x30, |
| 633 | DM_RET_ACTION_MASK = 0xf0 |
| 634 | } dev_match_ret; |
| 635 | |
| 636 | typedef enum { |
| 637 | XPT_DEPTH_BUS, |
| 638 | XPT_DEPTH_TARGET, |
| 639 | XPT_DEPTH_DEVICE, |
| 640 | XPT_DEPTH_PERIPH |
| 641 | } xpt_traverse_depth; |
| 642 | |
| 643 | struct xpt_traverse_config { |
| 644 | xpt_traverse_depth depth; |
| 645 | void *tr_func; |
| 646 | void *tr_arg; |
| 647 | }; |
| 648 | |
| 649 | typedef int xpt_busfunc_t (struct cam_eb *bus, void *arg); |
| 650 | typedef int xpt_targetfunc_t (struct cam_et *target, void *arg); |
| 651 | typedef int xpt_devicefunc_t (struct cam_ed *device, void *arg); |
| 652 | typedef int xpt_periphfunc_t (struct cam_periph *periph, void *arg); |
| 653 | typedef int xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg); |
| 654 | |
| 655 | /* Transport layer configuration information */ |
| 656 | static struct xpt_softc xsoftc; |
| 657 | |
| 658 | /* Queues for our software interrupt handler */ |
| 659 | typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t; |
| 660 | typedef TAILQ_HEAD(cam_simq, cam_sim) cam_simq_t; |
| 661 | static cam_simq_t cam_simq; |
| 662 | static struct spinlock cam_simq_spin; |
| 663 | |
| 664 | struct cam_periph *xpt_periph; |
| 665 | |
| 666 | static periph_init_t xpt_periph_init; |
| 667 | |
| 668 | static periph_init_t probe_periph_init; |
| 669 | |
| 670 | static struct periph_driver xpt_driver = |
| 671 | { |
| 672 | xpt_periph_init, "xpt", |
| 673 | TAILQ_HEAD_INITIALIZER(xpt_driver.units) |
| 674 | }; |
| 675 | |
| 676 | static struct periph_driver probe_driver = |
| 677 | { |
| 678 | probe_periph_init, "probe", |
| 679 | TAILQ_HEAD_INITIALIZER(probe_driver.units) |
| 680 | }; |
| 681 | |
| 682 | PERIPHDRIVER_DECLARE(xpt, xpt_driver); |
| 683 | PERIPHDRIVER_DECLARE(probe, probe_driver); |
| 684 | |
| 685 | static d_open_t xptopen; |
| 686 | static d_close_t xptclose; |
| 687 | static d_ioctl_t xptioctl; |
| 688 | |
| 689 | static struct dev_ops xpt_ops = { |
| 690 | { "xpt", 0, 0 }, |
| 691 | .d_open = xptopen, |
| 692 | .d_close = xptclose, |
| 693 | .d_ioctl = xptioctl |
| 694 | }; |
| 695 | |
| 696 | static void dead_sim_action(struct cam_sim *sim, union ccb *ccb); |
| 697 | static void dead_sim_poll(struct cam_sim *sim); |
| 698 | |
| 699 | /* Dummy SIM that is used when the real one has gone. */ |
| 700 | static struct cam_sim cam_dead_sim; |
| 701 | static struct lock cam_dead_lock; |
| 702 | |
| 703 | /* Storage for debugging datastructures */ |
| 704 | #ifdef CAMDEBUG |
| 705 | struct cam_path *cam_dpath; |
| 706 | u_int32_t cam_dflags; |
| 707 | u_int32_t cam_debug_delay; |
| 708 | #endif |
| 709 | |
| 710 | #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG) |
| 711 | #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS" |
| 712 | #endif |
| 713 | |
| 714 | /* |
| 715 | * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG |
| 716 | * enabled. Also, the user must have either none, or all of CAM_DEBUG_BUS, |
| 717 | * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified. |
| 718 | */ |
| 719 | #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \ |
| 720 | || defined(CAM_DEBUG_LUN) |
| 721 | #ifdef CAMDEBUG |
| 722 | #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \ |
| 723 | || !defined(CAM_DEBUG_LUN) |
| 724 | #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \ |
| 725 | and CAM_DEBUG_LUN" |
| 726 | #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */ |
| 727 | #else /* !CAMDEBUG */ |
| 728 | #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options" |
| 729 | #endif /* CAMDEBUG */ |
| 730 | #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */ |
| 731 | |
| 732 | /* Our boot-time initialization hook */ |
| 733 | static int cam_module_event_handler(module_t, int /*modeventtype_t*/, void *); |
| 734 | |
| 735 | static moduledata_t cam_moduledata = { |
| 736 | "cam", |
| 737 | cam_module_event_handler, |
| 738 | NULL |
| 739 | }; |
| 740 | |
| 741 | static int xpt_init(void *); |
| 742 | |
| 743 | DECLARE_MODULE(cam, cam_moduledata, SI_SUB_CONFIGURE, SI_ORDER_SECOND); |
| 744 | MODULE_VERSION(cam, 1); |
| 745 | |
| 746 | |
| 747 | static cam_status xpt_compile_path(struct cam_path *new_path, |
| 748 | struct cam_periph *perph, |
| 749 | path_id_t path_id, |
| 750 | target_id_t target_id, |
| 751 | lun_id_t lun_id); |
| 752 | |
| 753 | static void xpt_release_path(struct cam_path *path); |
| 754 | |
| 755 | static void xpt_async_bcast(struct async_list *async_head, |
| 756 | u_int32_t async_code, |
| 757 | struct cam_path *path, |
| 758 | void *async_arg); |
| 759 | static void xpt_dev_async(u_int32_t async_code, |
| 760 | struct cam_eb *bus, |
| 761 | struct cam_et *target, |
| 762 | struct cam_ed *device, |
| 763 | void *async_arg); |
| 764 | static path_id_t xptnextfreepathid(void); |
| 765 | static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus); |
| 766 | static union ccb *xpt_get_ccb(struct cam_ed *device); |
| 767 | static int xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo, |
| 768 | u_int32_t new_priority); |
| 769 | static void xpt_run_dev_allocq(struct cam_eb *bus); |
| 770 | static void xpt_run_dev_sendq(struct cam_eb *bus); |
| 771 | static timeout_t xpt_release_devq_timeout; |
| 772 | static void xpt_release_bus(struct cam_eb *bus); |
| 773 | static void xpt_release_devq_device(struct cam_ed *dev, u_int count, |
| 774 | int run_queue); |
| 775 | static struct cam_et* |
| 776 | xpt_alloc_target(struct cam_eb *bus, target_id_t target_id); |
| 777 | static void xpt_release_target(struct cam_eb *bus, struct cam_et *target); |
| 778 | static struct cam_ed* |
| 779 | xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, |
| 780 | lun_id_t lun_id); |
| 781 | static void xpt_release_device(struct cam_eb *bus, struct cam_et *target, |
| 782 | struct cam_ed *device); |
| 783 | static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings); |
| 784 | static struct cam_eb* |
| 785 | xpt_find_bus(path_id_t path_id); |
| 786 | static struct cam_et* |
| 787 | xpt_find_target(struct cam_eb *bus, target_id_t target_id); |
| 788 | static struct cam_ed* |
| 789 | xpt_find_device(struct cam_et *target, lun_id_t lun_id); |
| 790 | static void xpt_scan_bus(struct cam_periph *periph, union ccb *ccb); |
| 791 | static void xpt_scan_lun(struct cam_periph *periph, |
| 792 | struct cam_path *path, cam_flags flags, |
| 793 | union ccb *ccb); |
| 794 | static void xptscandone(struct cam_periph *periph, union ccb *done_ccb); |
| 795 | static xpt_busfunc_t xptconfigbuscountfunc; |
| 796 | static xpt_busfunc_t xptconfigfunc; |
| 797 | static void xpt_config(void *arg); |
| 798 | static xpt_devicefunc_t xptpassannouncefunc; |
| 799 | static void xpt_finishconfig(struct cam_periph *periph, union ccb *ccb); |
| 800 | static void xpt_uncount_bus (struct cam_eb *bus); |
| 801 | static void xptaction(struct cam_sim *sim, union ccb *work_ccb); |
| 802 | static void xptpoll(struct cam_sim *sim); |
| 803 | static inthand2_t swi_cambio; |
| 804 | static void camisr(void *); |
| 805 | static void camisr_runqueue(struct cam_sim *); |
| 806 | static dev_match_ret xptbusmatch(struct dev_match_pattern *patterns, |
| 807 | u_int num_patterns, struct cam_eb *bus); |
| 808 | static dev_match_ret xptdevicematch(struct dev_match_pattern *patterns, |
| 809 | u_int num_patterns, |
| 810 | struct cam_ed *device); |
| 811 | static dev_match_ret xptperiphmatch(struct dev_match_pattern *patterns, |
| 812 | u_int num_patterns, |
| 813 | struct cam_periph *periph); |
| 814 | static xpt_busfunc_t xptedtbusfunc; |
| 815 | static xpt_targetfunc_t xptedttargetfunc; |
| 816 | static xpt_devicefunc_t xptedtdevicefunc; |
| 817 | static xpt_periphfunc_t xptedtperiphfunc; |
| 818 | static xpt_pdrvfunc_t xptplistpdrvfunc; |
| 819 | static xpt_periphfunc_t xptplistperiphfunc; |
| 820 | static int xptedtmatch(struct ccb_dev_match *cdm); |
| 821 | static int xptperiphlistmatch(struct ccb_dev_match *cdm); |
| 822 | static int xptbustraverse(struct cam_eb *start_bus, |
| 823 | xpt_busfunc_t *tr_func, void *arg); |
| 824 | static int xpttargettraverse(struct cam_eb *bus, |
| 825 | struct cam_et *start_target, |
| 826 | xpt_targetfunc_t *tr_func, void *arg); |
| 827 | static int xptdevicetraverse(struct cam_et *target, |
| 828 | struct cam_ed *start_device, |
| 829 | xpt_devicefunc_t *tr_func, void *arg); |
| 830 | static int xptperiphtraverse(struct cam_ed *device, |
| 831 | struct cam_periph *start_periph, |
| 832 | xpt_periphfunc_t *tr_func, void *arg); |
| 833 | static int xptpdrvtraverse(struct periph_driver **start_pdrv, |
| 834 | xpt_pdrvfunc_t *tr_func, void *arg); |
| 835 | static int xptpdperiphtraverse(struct periph_driver **pdrv, |
| 836 | struct cam_periph *start_periph, |
| 837 | xpt_periphfunc_t *tr_func, |
| 838 | void *arg); |
| 839 | static xpt_busfunc_t xptdefbusfunc; |
| 840 | static xpt_targetfunc_t xptdeftargetfunc; |
| 841 | static xpt_devicefunc_t xptdefdevicefunc; |
| 842 | static xpt_periphfunc_t xptdefperiphfunc; |
| 843 | static int xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg); |
| 844 | static int xpt_for_all_devices(xpt_devicefunc_t *tr_func, |
| 845 | void *arg); |
| 846 | static xpt_devicefunc_t xptsetasyncfunc; |
| 847 | static xpt_busfunc_t xptsetasyncbusfunc; |
| 848 | static cam_status xptregister(struct cam_periph *periph, |
| 849 | void *arg); |
| 850 | static cam_status proberegister(struct cam_periph *periph, |
| 851 | void *arg); |
| 852 | static void probeschedule(struct cam_periph *probe_periph); |
| 853 | static void probestart(struct cam_periph *periph, union ccb *start_ccb); |
| 854 | static void proberequestdefaultnegotiation(struct cam_periph *periph); |
| 855 | static int proberequestbackoff(struct cam_periph *periph, |
| 856 | struct cam_ed *device); |
| 857 | static void probedone(struct cam_periph *periph, union ccb *done_ccb); |
| 858 | static void probecleanup(struct cam_periph *periph); |
| 859 | static void xpt_find_quirk(struct cam_ed *device); |
| 860 | static void xpt_devise_transport(struct cam_path *path); |
| 861 | static void xpt_set_transfer_settings(struct ccb_trans_settings *cts, |
| 862 | struct cam_ed *device, |
| 863 | int async_update); |
| 864 | static void xpt_toggle_tags(struct cam_path *path); |
| 865 | static void xpt_start_tags(struct cam_path *path); |
| 866 | static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus, |
| 867 | struct cam_ed *dev); |
| 868 | static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus, |
| 869 | struct cam_ed *dev); |
| 870 | static __inline int periph_is_queued(struct cam_periph *periph); |
| 871 | static __inline int device_is_alloc_queued(struct cam_ed *device); |
| 872 | static __inline int device_is_send_queued(struct cam_ed *device); |
| 873 | static __inline int dev_allocq_is_runnable(struct cam_devq *devq); |
| 874 | |
| 875 | static __inline int |
| 876 | xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev) |
| 877 | { |
| 878 | int retval; |
| 879 | |
| 880 | if (bus->sim->devq && dev->ccbq.devq_openings > 0) { |
| 881 | if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) { |
| 882 | cam_ccbq_resize(&dev->ccbq, |
| 883 | dev->ccbq.dev_openings |
| 884 | + dev->ccbq.dev_active); |
| 885 | dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED; |
| 886 | } |
| 887 | /* |
| 888 | * The priority of a device waiting for CCB resources |
| 889 | * is that of the the highest priority peripheral driver |
| 890 | * enqueued. |
| 891 | */ |
| 892 | retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue, |
| 893 | &dev->alloc_ccb_entry.pinfo, |
| 894 | CAMQ_GET_HEAD(&dev->drvq)->priority); |
| 895 | } else { |
| 896 | retval = 0; |
| 897 | } |
| 898 | |
| 899 | return (retval); |
| 900 | } |
| 901 | |
| 902 | static __inline int |
| 903 | xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev) |
| 904 | { |
| 905 | int retval; |
| 906 | |
| 907 | if (bus->sim->devq && dev->ccbq.dev_openings > 0) { |
| 908 | /* |
| 909 | * The priority of a device waiting for controller |
| 910 | * resources is that of the the highest priority CCB |
| 911 | * enqueued. |
| 912 | */ |
| 913 | retval = |
| 914 | xpt_schedule_dev(&bus->sim->devq->send_queue, |
| 915 | &dev->send_ccb_entry.pinfo, |
| 916 | CAMQ_GET_HEAD(&dev->ccbq.queue)->priority); |
| 917 | } else { |
| 918 | retval = 0; |
| 919 | } |
| 920 | return (retval); |
| 921 | } |
| 922 | |
| 923 | static __inline int |
| 924 | periph_is_queued(struct cam_periph *periph) |
| 925 | { |
| 926 | return (periph->pinfo.index != CAM_UNQUEUED_INDEX); |
| 927 | } |
| 928 | |
| 929 | static __inline int |
| 930 | device_is_alloc_queued(struct cam_ed *device) |
| 931 | { |
| 932 | return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); |
| 933 | } |
| 934 | |
| 935 | static __inline int |
| 936 | device_is_send_queued(struct cam_ed *device) |
| 937 | { |
| 938 | return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX); |
| 939 | } |
| 940 | |
| 941 | static __inline int |
| 942 | dev_allocq_is_runnable(struct cam_devq *devq) |
| 943 | { |
| 944 | /* |
| 945 | * Have work to do. |
| 946 | * Have space to do more work. |
| 947 | * Allowed to do work. |
| 948 | */ |
| 949 | return ((devq->alloc_queue.qfrozen_cnt == 0) |
| 950 | && (devq->alloc_queue.entries > 0) |
| 951 | && (devq->alloc_openings > 0)); |
| 952 | } |
| 953 | |
| 954 | static void |
| 955 | xpt_periph_init(void) |
| 956 | { |
| 957 | make_dev(&xpt_ops, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0"); |
| 958 | } |
| 959 | |
| 960 | static void |
| 961 | probe_periph_init(void) |
| 962 | { |
| 963 | } |
| 964 | |
| 965 | |
| 966 | static void |
| 967 | xptdone(struct cam_periph *periph, union ccb *done_ccb) |
| 968 | { |
| 969 | /* Caller will release the CCB */ |
| 970 | wakeup(&done_ccb->ccb_h.cbfcnp); |
| 971 | } |
| 972 | |
| 973 | static int |
| 974 | xptopen(struct dev_open_args *ap) |
| 975 | { |
| 976 | cdev_t dev = ap->a_head.a_dev; |
| 977 | |
| 978 | /* |
| 979 | * Only allow read-write access. |
| 980 | */ |
| 981 | if (((ap->a_oflags & FWRITE) == 0) || ((ap->a_oflags & FREAD) == 0)) |
| 982 | return(EPERM); |
| 983 | |
| 984 | /* |
| 985 | * We don't allow nonblocking access. |
| 986 | */ |
| 987 | if ((ap->a_oflags & O_NONBLOCK) != 0) { |
| 988 | kprintf("%s: can't do nonblocking access\n", devtoname(dev)); |
| 989 | return(ENODEV); |
| 990 | } |
| 991 | |
| 992 | /* Mark ourselves open */ |
| 993 | lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); |
| 994 | xsoftc.flags |= XPT_FLAG_OPEN; |
| 995 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 996 | |
| 997 | return(0); |
| 998 | } |
| 999 | |
| 1000 | static int |
| 1001 | xptclose(struct dev_close_args *ap) |
| 1002 | { |
| 1003 | |
| 1004 | /* Mark ourselves closed */ |
| 1005 | lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); |
| 1006 | xsoftc.flags &= ~XPT_FLAG_OPEN; |
| 1007 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 1008 | |
| 1009 | return(0); |
| 1010 | } |
| 1011 | |
| 1012 | /* |
| 1013 | * Don't automatically grab the xpt softc lock here even though this is going |
| 1014 | * through the xpt device. The xpt device is really just a back door for |
| 1015 | * accessing other devices and SIMs, so the right thing to do is to grab |
| 1016 | * the appropriate SIM lock once the bus/SIM is located. |
| 1017 | */ |
| 1018 | static int |
| 1019 | xptioctl(struct dev_ioctl_args *ap) |
| 1020 | { |
| 1021 | int error; |
| 1022 | |
| 1023 | error = 0; |
| 1024 | |
| 1025 | switch(ap->a_cmd) { |
| 1026 | /* |
| 1027 | * For the transport layer CAMIOCOMMAND ioctl, we really only want |
| 1028 | * to accept CCB types that don't quite make sense to send through a |
| 1029 | * passthrough driver. |
| 1030 | */ |
| 1031 | case CAMIOCOMMAND: { |
| 1032 | union ccb *ccb; |
| 1033 | union ccb *inccb; |
| 1034 | struct cam_eb *bus; |
| 1035 | |
| 1036 | inccb = (union ccb *)ap->a_data; |
| 1037 | |
| 1038 | bus = xpt_find_bus(inccb->ccb_h.path_id); |
| 1039 | if (bus == NULL) { |
| 1040 | error = EINVAL; |
| 1041 | break; |
| 1042 | } |
| 1043 | |
| 1044 | switch(inccb->ccb_h.func_code) { |
| 1045 | case XPT_SCAN_BUS: |
| 1046 | case XPT_RESET_BUS: |
| 1047 | if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD) |
| 1048 | || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) { |
| 1049 | error = EINVAL; |
| 1050 | break; |
| 1051 | } |
| 1052 | /* FALLTHROUGH */ |
| 1053 | case XPT_PATH_INQ: |
| 1054 | case XPT_ENG_INQ: |
| 1055 | case XPT_SCAN_LUN: |
| 1056 | |
| 1057 | ccb = xpt_alloc_ccb(); |
| 1058 | |
| 1059 | CAM_SIM_LOCK(bus->sim); |
| 1060 | |
| 1061 | /* |
| 1062 | * Create a path using the bus, target, and lun the |
| 1063 | * user passed in. |
| 1064 | */ |
| 1065 | if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, |
| 1066 | inccb->ccb_h.path_id, |
| 1067 | inccb->ccb_h.target_id, |
| 1068 | inccb->ccb_h.target_lun) != |
| 1069 | CAM_REQ_CMP){ |
| 1070 | error = EINVAL; |
| 1071 | CAM_SIM_UNLOCK(bus->sim); |
| 1072 | xpt_free_ccb(ccb); |
| 1073 | break; |
| 1074 | } |
| 1075 | /* Ensure all of our fields are correct */ |
| 1076 | xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path, |
| 1077 | inccb->ccb_h.pinfo.priority); |
| 1078 | xpt_merge_ccb(ccb, inccb); |
| 1079 | ccb->ccb_h.cbfcnp = xptdone; |
| 1080 | cam_periph_runccb(ccb, NULL, 0, 0, NULL); |
| 1081 | bcopy(ccb, inccb, sizeof(union ccb)); |
| 1082 | xpt_free_path(ccb->ccb_h.path); |
| 1083 | xpt_free_ccb(ccb); |
| 1084 | CAM_SIM_UNLOCK(bus->sim); |
| 1085 | break; |
| 1086 | |
| 1087 | case XPT_DEBUG: { |
| 1088 | union ccb ccb; |
| 1089 | |
| 1090 | /* |
| 1091 | * This is an immediate CCB, so it's okay to |
| 1092 | * allocate it on the stack. |
| 1093 | */ |
| 1094 | |
| 1095 | CAM_SIM_LOCK(bus->sim); |
| 1096 | |
| 1097 | /* |
| 1098 | * Create a path using the bus, target, and lun the |
| 1099 | * user passed in. |
| 1100 | */ |
| 1101 | if (xpt_create_path(&ccb.ccb_h.path, xpt_periph, |
| 1102 | inccb->ccb_h.path_id, |
| 1103 | inccb->ccb_h.target_id, |
| 1104 | inccb->ccb_h.target_lun) != |
| 1105 | CAM_REQ_CMP){ |
| 1106 | error = EINVAL; |
| 1107 | CAM_SIM_UNLOCK(bus->sim); |
| 1108 | break; |
| 1109 | } |
| 1110 | /* Ensure all of our fields are correct */ |
| 1111 | xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path, |
| 1112 | inccb->ccb_h.pinfo.priority); |
| 1113 | xpt_merge_ccb(&ccb, inccb); |
| 1114 | ccb.ccb_h.cbfcnp = xptdone; |
| 1115 | xpt_action(&ccb); |
| 1116 | CAM_SIM_UNLOCK(bus->sim); |
| 1117 | bcopy(&ccb, inccb, sizeof(union ccb)); |
| 1118 | xpt_free_path(ccb.ccb_h.path); |
| 1119 | break; |
| 1120 | |
| 1121 | } |
| 1122 | case XPT_DEV_MATCH: { |
| 1123 | struct cam_periph_map_info mapinfo; |
| 1124 | struct cam_path *old_path; |
| 1125 | |
| 1126 | /* |
| 1127 | * We can't deal with physical addresses for this |
| 1128 | * type of transaction. |
| 1129 | */ |
| 1130 | if (inccb->ccb_h.flags & CAM_DATA_PHYS) { |
| 1131 | error = EINVAL; |
| 1132 | break; |
| 1133 | } |
| 1134 | |
| 1135 | /* |
| 1136 | * Save this in case the caller had it set to |
| 1137 | * something in particular. |
| 1138 | */ |
| 1139 | old_path = inccb->ccb_h.path; |
| 1140 | |
| 1141 | /* |
| 1142 | * We really don't need a path for the matching |
| 1143 | * code. The path is needed because of the |
| 1144 | * debugging statements in xpt_action(). They |
| 1145 | * assume that the CCB has a valid path. |
| 1146 | */ |
| 1147 | inccb->ccb_h.path = xpt_periph->path; |
| 1148 | |
| 1149 | bzero(&mapinfo, sizeof(mapinfo)); |
| 1150 | |
| 1151 | /* |
| 1152 | * Map the pattern and match buffers into kernel |
| 1153 | * virtual address space. |
| 1154 | */ |
| 1155 | error = cam_periph_mapmem(inccb, &mapinfo); |
| 1156 | |
| 1157 | if (error) { |
| 1158 | inccb->ccb_h.path = old_path; |
| 1159 | break; |
| 1160 | } |
| 1161 | |
| 1162 | /* |
| 1163 | * This is an immediate CCB, we can send it on directly. |
| 1164 | */ |
| 1165 | xpt_action(inccb); |
| 1166 | |
| 1167 | /* |
| 1168 | * Map the buffers back into user space. |
| 1169 | */ |
| 1170 | cam_periph_unmapmem(inccb, &mapinfo); |
| 1171 | |
| 1172 | inccb->ccb_h.path = old_path; |
| 1173 | |
| 1174 | error = 0; |
| 1175 | break; |
| 1176 | } |
| 1177 | default: |
| 1178 | error = ENOTSUP; |
| 1179 | break; |
| 1180 | } |
| 1181 | xpt_release_bus(bus); |
| 1182 | break; |
| 1183 | } |
| 1184 | /* |
| 1185 | * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input, |
| 1186 | * with the periphal driver name and unit name filled in. The other |
| 1187 | * fields don't really matter as input. The passthrough driver name |
| 1188 | * ("pass"), and unit number are passed back in the ccb. The current |
| 1189 | * device generation number, and the index into the device peripheral |
| 1190 | * driver list, and the status are also passed back. Note that |
| 1191 | * since we do everything in one pass, unlike the XPT_GDEVLIST ccb, |
| 1192 | * we never return a status of CAM_GDEVLIST_LIST_CHANGED. It is |
| 1193 | * (or rather should be) impossible for the device peripheral driver |
| 1194 | * list to change since we look at the whole thing in one pass, and |
| 1195 | * we do it with lock protection. |
| 1196 | * |
| 1197 | */ |
| 1198 | case CAMGETPASSTHRU: { |
| 1199 | union ccb *ccb; |
| 1200 | struct cam_periph *periph; |
| 1201 | struct periph_driver **p_drv; |
| 1202 | char *name; |
| 1203 | u_int unit; |
| 1204 | u_int cur_generation; |
| 1205 | int base_periph_found; |
| 1206 | int splbreaknum; |
| 1207 | |
| 1208 | ccb = (union ccb *)ap->a_data; |
| 1209 | unit = ccb->cgdl.unit_number; |
| 1210 | name = ccb->cgdl.periph_name; |
| 1211 | /* |
| 1212 | * Every 100 devices, we want to drop our lock protection to |
| 1213 | * give the software interrupt handler a chance to run. |
| 1214 | * Most systems won't run into this check, but this should |
| 1215 | * avoid starvation in the software interrupt handler in |
| 1216 | * large systems. |
| 1217 | */ |
| 1218 | splbreaknum = 100; |
| 1219 | |
| 1220 | ccb = (union ccb *)ap->a_data; |
| 1221 | |
| 1222 | base_periph_found = 0; |
| 1223 | |
| 1224 | /* |
| 1225 | * Sanity check -- make sure we don't get a null peripheral |
| 1226 | * driver name. |
| 1227 | */ |
| 1228 | if (*ccb->cgdl.periph_name == '\0') { |
| 1229 | error = EINVAL; |
| 1230 | break; |
| 1231 | } |
| 1232 | |
| 1233 | /* Keep the list from changing while we traverse it */ |
| 1234 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 1235 | ptstartover: |
| 1236 | cur_generation = xsoftc.xpt_generation; |
| 1237 | |
| 1238 | /* first find our driver in the list of drivers */ |
| 1239 | for (p_drv = periph_drivers; *p_drv != NULL; p_drv++) { |
| 1240 | if (strcmp((*p_drv)->driver_name, name) == 0) |
| 1241 | break; |
| 1242 | } |
| 1243 | |
| 1244 | if (*p_drv == NULL) { |
| 1245 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 1246 | ccb->ccb_h.status = CAM_REQ_CMP_ERR; |
| 1247 | ccb->cgdl.status = CAM_GDEVLIST_ERROR; |
| 1248 | *ccb->cgdl.periph_name = '\0'; |
| 1249 | ccb->cgdl.unit_number = 0; |
| 1250 | error = ENOENT; |
| 1251 | break; |
| 1252 | } |
| 1253 | |
| 1254 | /* |
| 1255 | * Run through every peripheral instance of this driver |
| 1256 | * and check to see whether it matches the unit passed |
| 1257 | * in by the user. If it does, get out of the loops and |
| 1258 | * find the passthrough driver associated with that |
| 1259 | * peripheral driver. |
| 1260 | */ |
| 1261 | TAILQ_FOREACH(periph, &(*p_drv)->units, unit_links) { |
| 1262 | |
| 1263 | if (periph->unit_number == unit) { |
| 1264 | break; |
| 1265 | } else if (--splbreaknum == 0) { |
| 1266 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 1267 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 1268 | splbreaknum = 100; |
| 1269 | if (cur_generation != xsoftc.xpt_generation) |
| 1270 | goto ptstartover; |
| 1271 | } |
| 1272 | } |
| 1273 | /* |
| 1274 | * If we found the peripheral driver that the user passed |
| 1275 | * in, go through all of the peripheral drivers for that |
| 1276 | * particular device and look for a passthrough driver. |
| 1277 | */ |
| 1278 | if (periph != NULL) { |
| 1279 | struct cam_ed *device; |
| 1280 | int i; |
| 1281 | |
| 1282 | base_periph_found = 1; |
| 1283 | device = periph->path->device; |
| 1284 | for (i = 0, periph = SLIST_FIRST(&device->periphs); |
| 1285 | periph != NULL; |
| 1286 | periph = SLIST_NEXT(periph, periph_links), i++) { |
| 1287 | /* |
| 1288 | * Check to see whether we have a |
| 1289 | * passthrough device or not. |
| 1290 | */ |
| 1291 | if (strcmp(periph->periph_name, "pass") == 0) { |
| 1292 | /* |
| 1293 | * Fill in the getdevlist fields. |
| 1294 | */ |
| 1295 | strcpy(ccb->cgdl.periph_name, |
| 1296 | periph->periph_name); |
| 1297 | ccb->cgdl.unit_number = |
| 1298 | periph->unit_number; |
| 1299 | if (SLIST_NEXT(periph, periph_links)) |
| 1300 | ccb->cgdl.status = |
| 1301 | CAM_GDEVLIST_MORE_DEVS; |
| 1302 | else |
| 1303 | ccb->cgdl.status = |
| 1304 | CAM_GDEVLIST_LAST_DEVICE; |
| 1305 | ccb->cgdl.generation = |
| 1306 | device->generation; |
| 1307 | ccb->cgdl.index = i; |
| 1308 | /* |
| 1309 | * Fill in some CCB header fields |
| 1310 | * that the user may want. |
| 1311 | */ |
| 1312 | ccb->ccb_h.path_id = |
| 1313 | periph->path->bus->path_id; |
| 1314 | ccb->ccb_h.target_id = |
| 1315 | periph->path->target->target_id; |
| 1316 | ccb->ccb_h.target_lun = |
| 1317 | periph->path->device->lun_id; |
| 1318 | ccb->ccb_h.status = CAM_REQ_CMP; |
| 1319 | break; |
| 1320 | } |
| 1321 | } |
| 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * If the periph is null here, one of two things has |
| 1326 | * happened. The first possibility is that we couldn't |
| 1327 | * find the unit number of the particular peripheral driver |
| 1328 | * that the user is asking about. e.g. the user asks for |
| 1329 | * the passthrough driver for "da11". We find the list of |
| 1330 | * "da" peripherals all right, but there is no unit 11. |
| 1331 | * The other possibility is that we went through the list |
| 1332 | * of peripheral drivers attached to the device structure, |
| 1333 | * but didn't find one with the name "pass". Either way, |
| 1334 | * we return ENOENT, since we couldn't find something. |
| 1335 | */ |
| 1336 | if (periph == NULL) { |
| 1337 | ccb->ccb_h.status = CAM_REQ_CMP_ERR; |
| 1338 | ccb->cgdl.status = CAM_GDEVLIST_ERROR; |
| 1339 | *ccb->cgdl.periph_name = '\0'; |
| 1340 | ccb->cgdl.unit_number = 0; |
| 1341 | error = ENOENT; |
| 1342 | /* |
| 1343 | * It is unfortunate that this is even necessary, |
| 1344 | * but there are many, many clueless users out there. |
| 1345 | * If this is true, the user is looking for the |
| 1346 | * passthrough driver, but doesn't have one in his |
| 1347 | * kernel. |
| 1348 | */ |
| 1349 | if (base_periph_found == 1) { |
| 1350 | kprintf("xptioctl: pass driver is not in the " |
| 1351 | "kernel\n"); |
| 1352 | kprintf("xptioctl: put \"device pass\" in " |
| 1353 | "your kernel config file\n"); |
| 1354 | } |
| 1355 | } |
| 1356 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 1357 | break; |
| 1358 | } |
| 1359 | default: |
| 1360 | error = ENOTTY; |
| 1361 | break; |
| 1362 | } |
| 1363 | |
| 1364 | return(error); |
| 1365 | } |
| 1366 | |
| 1367 | static int |
| 1368 | cam_module_event_handler(module_t mod, int what, void *arg) |
| 1369 | { |
| 1370 | int error; |
| 1371 | |
| 1372 | switch (what) { |
| 1373 | case MOD_LOAD: |
| 1374 | if ((error = xpt_init(NULL)) != 0) |
| 1375 | return (error); |
| 1376 | break; |
| 1377 | case MOD_UNLOAD: |
| 1378 | return EBUSY; |
| 1379 | default: |
| 1380 | return EOPNOTSUPP; |
| 1381 | } |
| 1382 | |
| 1383 | return 0; |
| 1384 | } |
| 1385 | |
| 1386 | /* |
| 1387 | * Thread to handle asynchronous main-context requests. |
| 1388 | * |
| 1389 | * This function is typically used by drivers to perform complex actions |
| 1390 | * such as bus scans and engineering requests in a main context instead |
| 1391 | * of an interrupt context. |
| 1392 | */ |
| 1393 | static void |
| 1394 | xpt_scanner_thread(void *dummy) |
| 1395 | { |
| 1396 | union ccb *ccb; |
| 1397 | struct cam_sim *sim; |
| 1398 | |
| 1399 | get_mplock(); |
| 1400 | |
| 1401 | for (;;) { |
| 1402 | xpt_lock_buses(); |
| 1403 | xsoftc.ccb_scanq_running = 1; |
| 1404 | while ((ccb = (void *)TAILQ_FIRST(&xsoftc.ccb_scanq)) != NULL) { |
| 1405 | TAILQ_REMOVE(&xsoftc.ccb_scanq, &ccb->ccb_h, |
| 1406 | sim_links.tqe); |
| 1407 | xpt_unlock_buses(); |
| 1408 | |
| 1409 | sim = ccb->ccb_h.path->bus->sim; |
| 1410 | CAM_SIM_LOCK(sim); |
| 1411 | xpt_action(ccb); |
| 1412 | CAM_SIM_UNLOCK(sim); |
| 1413 | |
| 1414 | xpt_lock_buses(); |
| 1415 | } |
| 1416 | xsoftc.ccb_scanq_running = 0; |
| 1417 | tsleep_interlock(&xsoftc.ccb_scanq, 0); |
| 1418 | xpt_unlock_buses(); |
| 1419 | tsleep(&xsoftc.ccb_scanq, PINTERLOCKED, "ccb_scanq", 0); |
| 1420 | } |
| 1421 | |
| 1422 | rel_mplock(); /* not reached */ |
| 1423 | } |
| 1424 | |
| 1425 | /* |
| 1426 | * Issue an asynchronous asction |
| 1427 | */ |
| 1428 | void |
| 1429 | xpt_action_async(union ccb *ccb) |
| 1430 | { |
| 1431 | xpt_lock_buses(); |
| 1432 | TAILQ_INSERT_TAIL(&xsoftc.ccb_scanq, &ccb->ccb_h, sim_links.tqe); |
| 1433 | if (xsoftc.ccb_scanq_running == 0) { |
| 1434 | xsoftc.ccb_scanq_running = 1; |
| 1435 | wakeup(&xsoftc.ccb_scanq); |
| 1436 | } |
| 1437 | xpt_unlock_buses(); |
| 1438 | } |
| 1439 | |
| 1440 | |
| 1441 | /* Functions accessed by the peripheral drivers */ |
| 1442 | static int |
| 1443 | xpt_init(void *dummy) |
| 1444 | { |
| 1445 | struct cam_sim *xpt_sim; |
| 1446 | struct cam_path *path; |
| 1447 | struct cam_devq *devq; |
| 1448 | cam_status status; |
| 1449 | |
| 1450 | TAILQ_INIT(&xsoftc.xpt_busses); |
| 1451 | TAILQ_INIT(&cam_simq); |
| 1452 | TAILQ_INIT(&xsoftc.ccb_scanq); |
| 1453 | STAILQ_INIT(&xsoftc.highpowerq); |
| 1454 | xsoftc.num_highpower = CAM_MAX_HIGHPOWER; |
| 1455 | |
| 1456 | spin_init(&cam_simq_spin); |
| 1457 | lockinit(&xsoftc.xpt_lock, "XPT lock", 0, LK_CANRECURSE); |
| 1458 | lockinit(&xsoftc.xpt_topo_lock, "XPT topology lock", 0, LK_CANRECURSE); |
| 1459 | |
| 1460 | SLIST_INIT(&cam_dead_sim.ccb_freeq); |
| 1461 | TAILQ_INIT(&cam_dead_sim.sim_doneq); |
| 1462 | spin_init(&cam_dead_sim.sim_spin); |
| 1463 | cam_dead_sim.sim_action = dead_sim_action; |
| 1464 | cam_dead_sim.sim_poll = dead_sim_poll; |
| 1465 | cam_dead_sim.sim_name = "dead_sim"; |
| 1466 | cam_dead_sim.lock = &cam_dead_lock; |
| 1467 | lockinit(&cam_dead_lock, "XPT dead_sim lock", 0, LK_CANRECURSE); |
| 1468 | cam_dead_sim.flags |= CAM_SIM_DEREGISTERED; |
| 1469 | |
| 1470 | /* |
| 1471 | * The xpt layer is, itself, the equivelent of a SIM. |
| 1472 | * Allow 16 ccbs in the ccb pool for it. This should |
| 1473 | * give decent parallelism when we probe busses and |
| 1474 | * perform other XPT functions. |
| 1475 | */ |
| 1476 | devq = cam_simq_alloc(16); |
| 1477 | xpt_sim = cam_sim_alloc(xptaction, |
| 1478 | xptpoll, |
| 1479 | "xpt", |
| 1480 | /*softc*/NULL, |
| 1481 | /*unit*/0, |
| 1482 | /*lock*/&xsoftc.xpt_lock, |
| 1483 | /*max_dev_transactions*/0, |
| 1484 | /*max_tagged_dev_transactions*/0, |
| 1485 | devq); |
| 1486 | cam_simq_release(devq); |
| 1487 | if (xpt_sim == NULL) |
| 1488 | return (ENOMEM); |
| 1489 | |
| 1490 | xpt_sim->max_ccbs = 16; |
| 1491 | |
| 1492 | lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); |
| 1493 | if ((status = xpt_bus_register(xpt_sim, /*bus #*/0)) != CAM_SUCCESS) { |
| 1494 | kprintf("xpt_init: xpt_bus_register failed with status %#x," |
| 1495 | " failing attach\n", status); |
| 1496 | return (EINVAL); |
| 1497 | } |
| 1498 | |
| 1499 | /* |
| 1500 | * Looking at the XPT from the SIM layer, the XPT is |
| 1501 | * the equivelent of a peripheral driver. Allocate |
| 1502 | * a peripheral driver entry for us. |
| 1503 | */ |
| 1504 | if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID, |
| 1505 | CAM_TARGET_WILDCARD, |
| 1506 | CAM_LUN_WILDCARD)) != CAM_REQ_CMP) { |
| 1507 | kprintf("xpt_init: xpt_create_path failed with status %#x," |
| 1508 | " failing attach\n", status); |
| 1509 | return (EINVAL); |
| 1510 | } |
| 1511 | |
| 1512 | cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO, |
| 1513 | path, NULL, 0, xpt_sim); |
| 1514 | xpt_free_path(path); |
| 1515 | |
| 1516 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 1517 | |
| 1518 | /* |
| 1519 | * Register a callback for when interrupts are enabled. |
| 1520 | */ |
| 1521 | xsoftc.xpt_config_hook = kmalloc(sizeof(struct intr_config_hook), |
| 1522 | M_CAMXPT, M_INTWAIT | M_ZERO); |
| 1523 | xsoftc.xpt_config_hook->ich_func = xpt_config; |
| 1524 | xsoftc.xpt_config_hook->ich_desc = "xpt"; |
| 1525 | xsoftc.xpt_config_hook->ich_order = 1000; |
| 1526 | if (config_intrhook_establish(xsoftc.xpt_config_hook) != 0) { |
| 1527 | kfree (xsoftc.xpt_config_hook, M_CAMXPT); |
| 1528 | kprintf("xpt_init: config_intrhook_establish failed " |
| 1529 | "- failing attach\n"); |
| 1530 | } |
| 1531 | |
| 1532 | /* fire up rescan thread */ |
| 1533 | if (kthread_create(xpt_scanner_thread, NULL, NULL, "xpt_thrd")) { |
| 1534 | kprintf("xpt_init: failed to create rescan thread\n"); |
| 1535 | } |
| 1536 | /* Install our software interrupt handlers */ |
| 1537 | register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio", NULL); |
| 1538 | |
| 1539 | return (0); |
| 1540 | } |
| 1541 | |
| 1542 | static cam_status |
| 1543 | xptregister(struct cam_periph *periph, void *arg) |
| 1544 | { |
| 1545 | struct cam_sim *xpt_sim; |
| 1546 | |
| 1547 | if (periph == NULL) { |
| 1548 | kprintf("xptregister: periph was NULL!!\n"); |
| 1549 | return(CAM_REQ_CMP_ERR); |
| 1550 | } |
| 1551 | |
| 1552 | xpt_sim = (struct cam_sim *)arg; |
| 1553 | xpt_sim->softc = periph; |
| 1554 | xpt_periph = periph; |
| 1555 | periph->softc = NULL; |
| 1556 | |
| 1557 | return(CAM_REQ_CMP); |
| 1558 | } |
| 1559 | |
| 1560 | int32_t |
| 1561 | xpt_add_periph(struct cam_periph *periph) |
| 1562 | { |
| 1563 | struct cam_ed *device; |
| 1564 | int32_t status; |
| 1565 | struct periph_list *periph_head; |
| 1566 | |
| 1567 | sim_lock_assert_owned(periph->sim->lock); |
| 1568 | |
| 1569 | device = periph->path->device; |
| 1570 | |
| 1571 | periph_head = &device->periphs; |
| 1572 | |
| 1573 | status = CAM_REQ_CMP; |
| 1574 | |
| 1575 | if (device != NULL) { |
| 1576 | /* |
| 1577 | * Make room for this peripheral |
| 1578 | * so it will fit in the queue |
| 1579 | * when it's scheduled to run |
| 1580 | */ |
| 1581 | status = camq_resize(&device->drvq, |
| 1582 | device->drvq.array_size + 1); |
| 1583 | |
| 1584 | device->generation++; |
| 1585 | |
| 1586 | SLIST_INSERT_HEAD(periph_head, periph, periph_links); |
| 1587 | } |
| 1588 | |
| 1589 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 1590 | xsoftc.xpt_generation++; |
| 1591 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 1592 | |
| 1593 | return (status); |
| 1594 | } |
| 1595 | |
| 1596 | void |
| 1597 | xpt_remove_periph(struct cam_periph *periph) |
| 1598 | { |
| 1599 | struct cam_ed *device; |
| 1600 | |
| 1601 | sim_lock_assert_owned(periph->sim->lock); |
| 1602 | |
| 1603 | device = periph->path->device; |
| 1604 | |
| 1605 | if (device != NULL) { |
| 1606 | struct periph_list *periph_head; |
| 1607 | |
| 1608 | periph_head = &device->periphs; |
| 1609 | |
| 1610 | /* Release the slot for this peripheral */ |
| 1611 | camq_resize(&device->drvq, device->drvq.array_size - 1); |
| 1612 | |
| 1613 | device->generation++; |
| 1614 | |
| 1615 | SLIST_REMOVE(periph_head, periph, cam_periph, periph_links); |
| 1616 | } |
| 1617 | |
| 1618 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 1619 | xsoftc.xpt_generation++; |
| 1620 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 1621 | } |
| 1622 | |
| 1623 | void |
| 1624 | xpt_announce_periph(struct cam_periph *periph, char *announce_string) |
| 1625 | { |
| 1626 | struct ccb_pathinq cpi; |
| 1627 | struct ccb_trans_settings cts; |
| 1628 | struct cam_path *path; |
| 1629 | u_int speed; |
| 1630 | u_int freq; |
| 1631 | u_int mb; |
| 1632 | |
| 1633 | sim_lock_assert_owned(periph->sim->lock); |
| 1634 | |
| 1635 | path = periph->path; |
| 1636 | |
| 1637 | /* Report basic attachment and inquiry data */ |
| 1638 | kprintf("%s%d at %s%d bus %d target %d lun %d\n", |
| 1639 | periph->periph_name, periph->unit_number, |
| 1640 | path->bus->sim->sim_name, |
| 1641 | path->bus->sim->unit_number, |
| 1642 | path->bus->sim->bus_id, |
| 1643 | path->target->target_id, |
| 1644 | path->device->lun_id); |
| 1645 | kprintf("%s%d: ", periph->periph_name, periph->unit_number); |
| 1646 | scsi_print_inquiry(&path->device->inq_data); |
| 1647 | |
| 1648 | /* Report serial number */ |
| 1649 | if (path->device->serial_num_len > 0) { |
| 1650 | /* Don't wrap the screen - print only the first 60 chars */ |
| 1651 | kprintf("%s%d: Serial Number %.60s\n", periph->periph_name, |
| 1652 | periph->unit_number, path->device->serial_num); |
| 1653 | } |
| 1654 | |
| 1655 | /* Acquire and report transfer speed */ |
| 1656 | xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); |
| 1657 | cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; |
| 1658 | cts.type = CTS_TYPE_CURRENT_SETTINGS; |
| 1659 | xpt_action((union ccb*)&cts); |
| 1660 | if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { |
| 1661 | return; |
| 1662 | } |
| 1663 | |
| 1664 | /* Ask the SIM for its base transfer speed */ |
| 1665 | xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); |
| 1666 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 1667 | xpt_action((union ccb *)&cpi); |
| 1668 | |
| 1669 | speed = cpi.base_transfer_speed; |
| 1670 | freq = 0; |
| 1671 | if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { |
| 1672 | struct ccb_trans_settings_spi *spi; |
| 1673 | |
| 1674 | spi = &cts.xport_specific.spi; |
| 1675 | if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) != 0 |
| 1676 | && spi->sync_offset != 0) { |
| 1677 | freq = scsi_calc_syncsrate(spi->sync_period); |
| 1678 | speed = freq; |
| 1679 | } |
| 1680 | |
| 1681 | if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0) |
| 1682 | speed *= (0x01 << spi->bus_width); |
| 1683 | } |
| 1684 | if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { |
| 1685 | struct ccb_trans_settings_fc *fc = &cts.xport_specific.fc; |
| 1686 | if (fc->valid & CTS_FC_VALID_SPEED) { |
| 1687 | speed = fc->bitrate; |
| 1688 | } |
| 1689 | } |
| 1690 | |
| 1691 | if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SAS) { |
| 1692 | struct ccb_trans_settings_sas *sas = &cts.xport_specific.sas; |
| 1693 | if (sas->valid & CTS_SAS_VALID_SPEED) { |
| 1694 | speed = sas->bitrate; |
| 1695 | } |
| 1696 | } |
| 1697 | |
| 1698 | mb = speed / 1000; |
| 1699 | if (mb > 0) |
| 1700 | kprintf("%s%d: %d.%03dMB/s transfers", |
| 1701 | periph->periph_name, periph->unit_number, |
| 1702 | mb, speed % 1000); |
| 1703 | else |
| 1704 | kprintf("%s%d: %dKB/s transfers", periph->periph_name, |
| 1705 | periph->unit_number, speed); |
| 1706 | |
| 1707 | /* Report additional information about SPI connections */ |
| 1708 | if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_SPI) { |
| 1709 | struct ccb_trans_settings_spi *spi; |
| 1710 | |
| 1711 | spi = &cts.xport_specific.spi; |
| 1712 | if (freq != 0) { |
| 1713 | kprintf(" (%d.%03dMHz%s, offset %d", freq / 1000, |
| 1714 | freq % 1000, |
| 1715 | (spi->ppr_options & MSG_EXT_PPR_DT_REQ) != 0 |
| 1716 | ? " DT" : "", |
| 1717 | spi->sync_offset); |
| 1718 | } |
| 1719 | if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) != 0 |
| 1720 | && spi->bus_width > 0) { |
| 1721 | if (freq != 0) { |
| 1722 | kprintf(", "); |
| 1723 | } else { |
| 1724 | kprintf(" ("); |
| 1725 | } |
| 1726 | kprintf("%dbit)", 8 * (0x01 << spi->bus_width)); |
| 1727 | } else if (freq != 0) { |
| 1728 | kprintf(")"); |
| 1729 | } |
| 1730 | } |
| 1731 | if (cts.ccb_h.status == CAM_REQ_CMP && cts.transport == XPORT_FC) { |
| 1732 | struct ccb_trans_settings_fc *fc; |
| 1733 | |
| 1734 | fc = &cts.xport_specific.fc; |
| 1735 | if (fc->valid & CTS_FC_VALID_WWNN) |
| 1736 | kprintf(" WWNN 0x%llx", (long long) fc->wwnn); |
| 1737 | if (fc->valid & CTS_FC_VALID_WWPN) |
| 1738 | kprintf(" WWPN 0x%llx", (long long) fc->wwpn); |
| 1739 | if (fc->valid & CTS_FC_VALID_PORT) |
| 1740 | kprintf(" PortID 0x%x", fc->port); |
| 1741 | } |
| 1742 | |
| 1743 | if (path->device->inq_flags & SID_CmdQue |
| 1744 | || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) { |
| 1745 | kprintf("\n%s%d: Command Queueing Enabled", |
| 1746 | periph->periph_name, periph->unit_number); |
| 1747 | } |
| 1748 | kprintf("\n"); |
| 1749 | |
| 1750 | /* |
| 1751 | * We only want to print the caller's announce string if they've |
| 1752 | * passed one in.. |
| 1753 | */ |
| 1754 | if (announce_string != NULL) |
| 1755 | kprintf("%s%d: %s\n", periph->periph_name, |
| 1756 | periph->unit_number, announce_string); |
| 1757 | } |
| 1758 | |
| 1759 | static dev_match_ret |
| 1760 | xptbusmatch(struct dev_match_pattern *patterns, u_int num_patterns, |
| 1761 | struct cam_eb *bus) |
| 1762 | { |
| 1763 | dev_match_ret retval; |
| 1764 | int i; |
| 1765 | |
| 1766 | retval = DM_RET_NONE; |
| 1767 | |
| 1768 | /* |
| 1769 | * If we aren't given something to match against, that's an error. |
| 1770 | */ |
| 1771 | if (bus == NULL) |
| 1772 | return(DM_RET_ERROR); |
| 1773 | |
| 1774 | /* |
| 1775 | * If there are no match entries, then this bus matches no |
| 1776 | * matter what. |
| 1777 | */ |
| 1778 | if ((patterns == NULL) || (num_patterns == 0)) |
| 1779 | return(DM_RET_DESCEND | DM_RET_COPY); |
| 1780 | |
| 1781 | for (i = 0; i < num_patterns; i++) { |
| 1782 | struct bus_match_pattern *cur_pattern; |
| 1783 | |
| 1784 | /* |
| 1785 | * If the pattern in question isn't for a bus node, we |
| 1786 | * aren't interested. However, we do indicate to the |
| 1787 | * calling routine that we should continue descending the |
| 1788 | * tree, since the user wants to match against lower-level |
| 1789 | * EDT elements. |
| 1790 | */ |
| 1791 | if (patterns[i].type != DEV_MATCH_BUS) { |
| 1792 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) |
| 1793 | retval |= DM_RET_DESCEND; |
| 1794 | continue; |
| 1795 | } |
| 1796 | |
| 1797 | cur_pattern = &patterns[i].pattern.bus_pattern; |
| 1798 | |
| 1799 | /* |
| 1800 | * If they want to match any bus node, we give them any |
| 1801 | * device node. |
| 1802 | */ |
| 1803 | if (cur_pattern->flags == BUS_MATCH_ANY) { |
| 1804 | /* set the copy flag */ |
| 1805 | retval |= DM_RET_COPY; |
| 1806 | |
| 1807 | /* |
| 1808 | * If we've already decided on an action, go ahead |
| 1809 | * and return. |
| 1810 | */ |
| 1811 | if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) |
| 1812 | return(retval); |
| 1813 | } |
| 1814 | |
| 1815 | /* |
| 1816 | * Not sure why someone would do this... |
| 1817 | */ |
| 1818 | if (cur_pattern->flags == BUS_MATCH_NONE) |
| 1819 | continue; |
| 1820 | |
| 1821 | if (((cur_pattern->flags & BUS_MATCH_PATH) != 0) |
| 1822 | && (cur_pattern->path_id != bus->path_id)) |
| 1823 | continue; |
| 1824 | |
| 1825 | if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0) |
| 1826 | && (cur_pattern->bus_id != bus->sim->bus_id)) |
| 1827 | continue; |
| 1828 | |
| 1829 | if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0) |
| 1830 | && (cur_pattern->unit_number != bus->sim->unit_number)) |
| 1831 | continue; |
| 1832 | |
| 1833 | if (((cur_pattern->flags & BUS_MATCH_NAME) != 0) |
| 1834 | && (strncmp(cur_pattern->dev_name, bus->sim->sim_name, |
| 1835 | DEV_IDLEN) != 0)) |
| 1836 | continue; |
| 1837 | |
| 1838 | /* |
| 1839 | * If we get to this point, the user definitely wants |
| 1840 | * information on this bus. So tell the caller to copy the |
| 1841 | * data out. |
| 1842 | */ |
| 1843 | retval |= DM_RET_COPY; |
| 1844 | |
| 1845 | /* |
| 1846 | * If the return action has been set to descend, then we |
| 1847 | * know that we've already seen a non-bus matching |
| 1848 | * expression, therefore we need to further descend the tree. |
| 1849 | * This won't change by continuing around the loop, so we |
| 1850 | * go ahead and return. If we haven't seen a non-bus |
| 1851 | * matching expression, we keep going around the loop until |
| 1852 | * we exhaust the matching expressions. We'll set the stop |
| 1853 | * flag once we fall out of the loop. |
| 1854 | */ |
| 1855 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) |
| 1856 | return(retval); |
| 1857 | } |
| 1858 | |
| 1859 | /* |
| 1860 | * If the return action hasn't been set to descend yet, that means |
| 1861 | * we haven't seen anything other than bus matching patterns. So |
| 1862 | * tell the caller to stop descending the tree -- the user doesn't |
| 1863 | * want to match against lower level tree elements. |
| 1864 | */ |
| 1865 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) |
| 1866 | retval |= DM_RET_STOP; |
| 1867 | |
| 1868 | return(retval); |
| 1869 | } |
| 1870 | |
| 1871 | static dev_match_ret |
| 1872 | xptdevicematch(struct dev_match_pattern *patterns, u_int num_patterns, |
| 1873 | struct cam_ed *device) |
| 1874 | { |
| 1875 | dev_match_ret retval; |
| 1876 | int i; |
| 1877 | |
| 1878 | retval = DM_RET_NONE; |
| 1879 | |
| 1880 | /* |
| 1881 | * If we aren't given something to match against, that's an error. |
| 1882 | */ |
| 1883 | if (device == NULL) |
| 1884 | return(DM_RET_ERROR); |
| 1885 | |
| 1886 | /* |
| 1887 | * If there are no match entries, then this device matches no |
| 1888 | * matter what. |
| 1889 | */ |
| 1890 | if ((patterns == NULL) || (num_patterns == 0)) |
| 1891 | return(DM_RET_DESCEND | DM_RET_COPY); |
| 1892 | |
| 1893 | for (i = 0; i < num_patterns; i++) { |
| 1894 | struct device_match_pattern *cur_pattern; |
| 1895 | |
| 1896 | /* |
| 1897 | * If the pattern in question isn't for a device node, we |
| 1898 | * aren't interested. |
| 1899 | */ |
| 1900 | if (patterns[i].type != DEV_MATCH_DEVICE) { |
| 1901 | if ((patterns[i].type == DEV_MATCH_PERIPH) |
| 1902 | && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)) |
| 1903 | retval |= DM_RET_DESCEND; |
| 1904 | continue; |
| 1905 | } |
| 1906 | |
| 1907 | cur_pattern = &patterns[i].pattern.device_pattern; |
| 1908 | |
| 1909 | /* |
| 1910 | * If they want to match any device node, we give them any |
| 1911 | * device node. |
| 1912 | */ |
| 1913 | if (cur_pattern->flags == DEV_MATCH_ANY) { |
| 1914 | /* set the copy flag */ |
| 1915 | retval |= DM_RET_COPY; |
| 1916 | |
| 1917 | |
| 1918 | /* |
| 1919 | * If we've already decided on an action, go ahead |
| 1920 | * and return. |
| 1921 | */ |
| 1922 | if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE) |
| 1923 | return(retval); |
| 1924 | } |
| 1925 | |
| 1926 | /* |
| 1927 | * Not sure why someone would do this... |
| 1928 | */ |
| 1929 | if (cur_pattern->flags == DEV_MATCH_NONE) |
| 1930 | continue; |
| 1931 | |
| 1932 | if (((cur_pattern->flags & DEV_MATCH_PATH) != 0) |
| 1933 | && (cur_pattern->path_id != device->target->bus->path_id)) |
| 1934 | continue; |
| 1935 | |
| 1936 | if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0) |
| 1937 | && (cur_pattern->target_id != device->target->target_id)) |
| 1938 | continue; |
| 1939 | |
| 1940 | if (((cur_pattern->flags & DEV_MATCH_LUN) != 0) |
| 1941 | && (cur_pattern->target_lun != device->lun_id)) |
| 1942 | continue; |
| 1943 | |
| 1944 | if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0) |
| 1945 | && (cam_quirkmatch((caddr_t)&device->inq_data, |
| 1946 | (caddr_t)&cur_pattern->inq_pat, |
| 1947 | 1, sizeof(cur_pattern->inq_pat), |
| 1948 | scsi_static_inquiry_match) == NULL)) |
| 1949 | continue; |
| 1950 | |
| 1951 | /* |
| 1952 | * If we get to this point, the user definitely wants |
| 1953 | * information on this device. So tell the caller to copy |
| 1954 | * the data out. |
| 1955 | */ |
| 1956 | retval |= DM_RET_COPY; |
| 1957 | |
| 1958 | /* |
| 1959 | * If the return action has been set to descend, then we |
| 1960 | * know that we've already seen a peripheral matching |
| 1961 | * expression, therefore we need to further descend the tree. |
| 1962 | * This won't change by continuing around the loop, so we |
| 1963 | * go ahead and return. If we haven't seen a peripheral |
| 1964 | * matching expression, we keep going around the loop until |
| 1965 | * we exhaust the matching expressions. We'll set the stop |
| 1966 | * flag once we fall out of the loop. |
| 1967 | */ |
| 1968 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND) |
| 1969 | return(retval); |
| 1970 | } |
| 1971 | |
| 1972 | /* |
| 1973 | * If the return action hasn't been set to descend yet, that means |
| 1974 | * we haven't seen any peripheral matching patterns. So tell the |
| 1975 | * caller to stop descending the tree -- the user doesn't want to |
| 1976 | * match against lower level tree elements. |
| 1977 | */ |
| 1978 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE) |
| 1979 | retval |= DM_RET_STOP; |
| 1980 | |
| 1981 | return(retval); |
| 1982 | } |
| 1983 | |
| 1984 | /* |
| 1985 | * Match a single peripheral against any number of match patterns. |
| 1986 | */ |
| 1987 | static dev_match_ret |
| 1988 | xptperiphmatch(struct dev_match_pattern *patterns, u_int num_patterns, |
| 1989 | struct cam_periph *periph) |
| 1990 | { |
| 1991 | dev_match_ret retval; |
| 1992 | int i; |
| 1993 | |
| 1994 | /* |
| 1995 | * If we aren't given something to match against, that's an error. |
| 1996 | */ |
| 1997 | if (periph == NULL) |
| 1998 | return(DM_RET_ERROR); |
| 1999 | |
| 2000 | /* |
| 2001 | * If there are no match entries, then this peripheral matches no |
| 2002 | * matter what. |
| 2003 | */ |
| 2004 | if ((patterns == NULL) || (num_patterns == 0)) |
| 2005 | return(DM_RET_STOP | DM_RET_COPY); |
| 2006 | |
| 2007 | /* |
| 2008 | * There aren't any nodes below a peripheral node, so there's no |
| 2009 | * reason to descend the tree any further. |
| 2010 | */ |
| 2011 | retval = DM_RET_STOP; |
| 2012 | |
| 2013 | for (i = 0; i < num_patterns; i++) { |
| 2014 | struct periph_match_pattern *cur_pattern; |
| 2015 | |
| 2016 | /* |
| 2017 | * If the pattern in question isn't for a peripheral, we |
| 2018 | * aren't interested. |
| 2019 | */ |
| 2020 | if (patterns[i].type != DEV_MATCH_PERIPH) |
| 2021 | continue; |
| 2022 | |
| 2023 | cur_pattern = &patterns[i].pattern.periph_pattern; |
| 2024 | |
| 2025 | /* |
| 2026 | * If they want to match on anything, then we will do so. |
| 2027 | */ |
| 2028 | if (cur_pattern->flags == PERIPH_MATCH_ANY) { |
| 2029 | /* set the copy flag */ |
| 2030 | retval |= DM_RET_COPY; |
| 2031 | |
| 2032 | /* |
| 2033 | * We've already set the return action to stop, |
| 2034 | * since there are no nodes below peripherals in |
| 2035 | * the tree. |
| 2036 | */ |
| 2037 | return(retval); |
| 2038 | } |
| 2039 | |
| 2040 | /* |
| 2041 | * Not sure why someone would do this... |
| 2042 | */ |
| 2043 | if (cur_pattern->flags == PERIPH_MATCH_NONE) |
| 2044 | continue; |
| 2045 | |
| 2046 | if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0) |
| 2047 | && (cur_pattern->path_id != periph->path->bus->path_id)) |
| 2048 | continue; |
| 2049 | |
| 2050 | /* |
| 2051 | * For the target and lun id's, we have to make sure the |
| 2052 | * target and lun pointers aren't NULL. The xpt peripheral |
| 2053 | * has a wildcard target and device. |
| 2054 | */ |
| 2055 | if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0) |
| 2056 | && ((periph->path->target == NULL) |
| 2057 | ||(cur_pattern->target_id != periph->path->target->target_id))) |
| 2058 | continue; |
| 2059 | |
| 2060 | if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0) |
| 2061 | && ((periph->path->device == NULL) |
| 2062 | || (cur_pattern->target_lun != periph->path->device->lun_id))) |
| 2063 | continue; |
| 2064 | |
| 2065 | if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0) |
| 2066 | && (cur_pattern->unit_number != periph->unit_number)) |
| 2067 | continue; |
| 2068 | |
| 2069 | if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0) |
| 2070 | && (strncmp(cur_pattern->periph_name, periph->periph_name, |
| 2071 | DEV_IDLEN) != 0)) |
| 2072 | continue; |
| 2073 | |
| 2074 | /* |
| 2075 | * If we get to this point, the user definitely wants |
| 2076 | * information on this peripheral. So tell the caller to |
| 2077 | * copy the data out. |
| 2078 | */ |
| 2079 | retval |= DM_RET_COPY; |
| 2080 | |
| 2081 | /* |
| 2082 | * The return action has already been set to stop, since |
| 2083 | * peripherals don't have any nodes below them in the EDT. |
| 2084 | */ |
| 2085 | return(retval); |
| 2086 | } |
| 2087 | |
| 2088 | /* |
| 2089 | * If we get to this point, the peripheral that was passed in |
| 2090 | * doesn't match any of the patterns. |
| 2091 | */ |
| 2092 | return(retval); |
| 2093 | } |
| 2094 | |
| 2095 | static int |
| 2096 | xptedtbusfunc(struct cam_eb *bus, void *arg) |
| 2097 | { |
| 2098 | struct ccb_dev_match *cdm; |
| 2099 | dev_match_ret retval; |
| 2100 | |
| 2101 | cdm = (struct ccb_dev_match *)arg; |
| 2102 | |
| 2103 | /* |
| 2104 | * If our position is for something deeper in the tree, that means |
| 2105 | * that we've already seen this node. So, we keep going down. |
| 2106 | */ |
| 2107 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2108 | && (cdm->pos.cookie.bus == bus) |
| 2109 | && (cdm->pos.position_type & CAM_DEV_POS_TARGET) |
| 2110 | && (cdm->pos.cookie.target != NULL)) |
| 2111 | retval = DM_RET_DESCEND; |
| 2112 | else |
| 2113 | retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus); |
| 2114 | |
| 2115 | /* |
| 2116 | * If we got an error, bail out of the search. |
| 2117 | */ |
| 2118 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { |
| 2119 | cdm->status = CAM_DEV_MATCH_ERROR; |
| 2120 | return(0); |
| 2121 | } |
| 2122 | |
| 2123 | /* |
| 2124 | * If the copy flag is set, copy this bus out. |
| 2125 | */ |
| 2126 | if (retval & DM_RET_COPY) { |
| 2127 | int spaceleft, j; |
| 2128 | |
| 2129 | spaceleft = cdm->match_buf_len - (cdm->num_matches * |
| 2130 | sizeof(struct dev_match_result)); |
| 2131 | |
| 2132 | /* |
| 2133 | * If we don't have enough space to put in another |
| 2134 | * match result, save our position and tell the |
| 2135 | * user there are more devices to check. |
| 2136 | */ |
| 2137 | if (spaceleft < sizeof(struct dev_match_result)) { |
| 2138 | bzero(&cdm->pos, sizeof(cdm->pos)); |
| 2139 | cdm->pos.position_type = |
| 2140 | CAM_DEV_POS_EDT | CAM_DEV_POS_BUS; |
| 2141 | |
| 2142 | cdm->pos.cookie.bus = bus; |
| 2143 | cdm->pos.generations[CAM_BUS_GENERATION]= |
| 2144 | xsoftc.bus_generation; |
| 2145 | cdm->status = CAM_DEV_MATCH_MORE; |
| 2146 | return(0); |
| 2147 | } |
| 2148 | j = cdm->num_matches; |
| 2149 | cdm->num_matches++; |
| 2150 | cdm->matches[j].type = DEV_MATCH_BUS; |
| 2151 | cdm->matches[j].result.bus_result.path_id = bus->path_id; |
| 2152 | cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id; |
| 2153 | cdm->matches[j].result.bus_result.unit_number = |
| 2154 | bus->sim->unit_number; |
| 2155 | strncpy(cdm->matches[j].result.bus_result.dev_name, |
| 2156 | bus->sim->sim_name, DEV_IDLEN); |
| 2157 | } |
| 2158 | |
| 2159 | /* |
| 2160 | * If the user is only interested in busses, there's no |
| 2161 | * reason to descend to the next level in the tree. |
| 2162 | */ |
| 2163 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) |
| 2164 | return(1); |
| 2165 | |
| 2166 | /* |
| 2167 | * If there is a target generation recorded, check it to |
| 2168 | * make sure the target list hasn't changed. |
| 2169 | */ |
| 2170 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2171 | && (bus == cdm->pos.cookie.bus) |
| 2172 | && (cdm->pos.position_type & CAM_DEV_POS_TARGET) |
| 2173 | && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0) |
| 2174 | && (cdm->pos.generations[CAM_TARGET_GENERATION] != |
| 2175 | bus->generation)) { |
| 2176 | cdm->status = CAM_DEV_MATCH_LIST_CHANGED; |
| 2177 | return(0); |
| 2178 | } |
| 2179 | |
| 2180 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2181 | && (cdm->pos.cookie.bus == bus) |
| 2182 | && (cdm->pos.position_type & CAM_DEV_POS_TARGET) |
| 2183 | && (cdm->pos.cookie.target != NULL)) |
| 2184 | return(xpttargettraverse(bus, |
| 2185 | (struct cam_et *)cdm->pos.cookie.target, |
| 2186 | xptedttargetfunc, arg)); |
| 2187 | else |
| 2188 | return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg)); |
| 2189 | } |
| 2190 | |
| 2191 | static int |
| 2192 | xptedttargetfunc(struct cam_et *target, void *arg) |
| 2193 | { |
| 2194 | struct ccb_dev_match *cdm; |
| 2195 | |
| 2196 | cdm = (struct ccb_dev_match *)arg; |
| 2197 | |
| 2198 | /* |
| 2199 | * If there is a device list generation recorded, check it to |
| 2200 | * make sure the device list hasn't changed. |
| 2201 | */ |
| 2202 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2203 | && (cdm->pos.cookie.bus == target->bus) |
| 2204 | && (cdm->pos.position_type & CAM_DEV_POS_TARGET) |
| 2205 | && (cdm->pos.cookie.target == target) |
| 2206 | && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) |
| 2207 | && (cdm->pos.generations[CAM_DEV_GENERATION] != 0) |
| 2208 | && (cdm->pos.generations[CAM_DEV_GENERATION] != |
| 2209 | target->generation)) { |
| 2210 | cdm->status = CAM_DEV_MATCH_LIST_CHANGED; |
| 2211 | return(0); |
| 2212 | } |
| 2213 | |
| 2214 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2215 | && (cdm->pos.cookie.bus == target->bus) |
| 2216 | && (cdm->pos.position_type & CAM_DEV_POS_TARGET) |
| 2217 | && (cdm->pos.cookie.target == target) |
| 2218 | && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) |
| 2219 | && (cdm->pos.cookie.device != NULL)) |
| 2220 | return(xptdevicetraverse(target, |
| 2221 | (struct cam_ed *)cdm->pos.cookie.device, |
| 2222 | xptedtdevicefunc, arg)); |
| 2223 | else |
| 2224 | return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg)); |
| 2225 | } |
| 2226 | |
| 2227 | static int |
| 2228 | xptedtdevicefunc(struct cam_ed *device, void *arg) |
| 2229 | { |
| 2230 | |
| 2231 | struct ccb_dev_match *cdm; |
| 2232 | dev_match_ret retval; |
| 2233 | |
| 2234 | cdm = (struct ccb_dev_match *)arg; |
| 2235 | |
| 2236 | /* |
| 2237 | * If our position is for something deeper in the tree, that means |
| 2238 | * that we've already seen this node. So, we keep going down. |
| 2239 | */ |
| 2240 | if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE) |
| 2241 | && (cdm->pos.cookie.device == device) |
| 2242 | && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) |
| 2243 | && (cdm->pos.cookie.periph != NULL)) |
| 2244 | retval = DM_RET_DESCEND; |
| 2245 | else |
| 2246 | retval = xptdevicematch(cdm->patterns, cdm->num_patterns, |
| 2247 | device); |
| 2248 | |
| 2249 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { |
| 2250 | cdm->status = CAM_DEV_MATCH_ERROR; |
| 2251 | return(0); |
| 2252 | } |
| 2253 | |
| 2254 | /* |
| 2255 | * If the copy flag is set, copy this device out. |
| 2256 | */ |
| 2257 | if (retval & DM_RET_COPY) { |
| 2258 | int spaceleft, j; |
| 2259 | |
| 2260 | spaceleft = cdm->match_buf_len - (cdm->num_matches * |
| 2261 | sizeof(struct dev_match_result)); |
| 2262 | |
| 2263 | /* |
| 2264 | * If we don't have enough space to put in another |
| 2265 | * match result, save our position and tell the |
| 2266 | * user there are more devices to check. |
| 2267 | */ |
| 2268 | if (spaceleft < sizeof(struct dev_match_result)) { |
| 2269 | bzero(&cdm->pos, sizeof(cdm->pos)); |
| 2270 | cdm->pos.position_type = |
| 2271 | CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | |
| 2272 | CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE; |
| 2273 | |
| 2274 | cdm->pos.cookie.bus = device->target->bus; |
| 2275 | cdm->pos.generations[CAM_BUS_GENERATION]= |
| 2276 | xsoftc.bus_generation; |
| 2277 | cdm->pos.cookie.target = device->target; |
| 2278 | cdm->pos.generations[CAM_TARGET_GENERATION] = |
| 2279 | device->target->bus->generation; |
| 2280 | cdm->pos.cookie.device = device; |
| 2281 | cdm->pos.generations[CAM_DEV_GENERATION] = |
| 2282 | device->target->generation; |
| 2283 | cdm->status = CAM_DEV_MATCH_MORE; |
| 2284 | return(0); |
| 2285 | } |
| 2286 | j = cdm->num_matches; |
| 2287 | cdm->num_matches++; |
| 2288 | cdm->matches[j].type = DEV_MATCH_DEVICE; |
| 2289 | cdm->matches[j].result.device_result.path_id = |
| 2290 | device->target->bus->path_id; |
| 2291 | cdm->matches[j].result.device_result.target_id = |
| 2292 | device->target->target_id; |
| 2293 | cdm->matches[j].result.device_result.target_lun = |
| 2294 | device->lun_id; |
| 2295 | bcopy(&device->inq_data, |
| 2296 | &cdm->matches[j].result.device_result.inq_data, |
| 2297 | sizeof(struct scsi_inquiry_data)); |
| 2298 | |
| 2299 | /* Let the user know whether this device is unconfigured */ |
| 2300 | if (device->flags & CAM_DEV_UNCONFIGURED) |
| 2301 | cdm->matches[j].result.device_result.flags = |
| 2302 | DEV_RESULT_UNCONFIGURED; |
| 2303 | else |
| 2304 | cdm->matches[j].result.device_result.flags = |
| 2305 | DEV_RESULT_NOFLAG; |
| 2306 | } |
| 2307 | |
| 2308 | /* |
| 2309 | * If the user isn't interested in peripherals, don't descend |
| 2310 | * the tree any further. |
| 2311 | */ |
| 2312 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP) |
| 2313 | return(1); |
| 2314 | |
| 2315 | /* |
| 2316 | * If there is a peripheral list generation recorded, make sure |
| 2317 | * it hasn't changed. |
| 2318 | */ |
| 2319 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2320 | && (device->target->bus == cdm->pos.cookie.bus) |
| 2321 | && (cdm->pos.position_type & CAM_DEV_POS_TARGET) |
| 2322 | && (device->target == cdm->pos.cookie.target) |
| 2323 | && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) |
| 2324 | && (device == cdm->pos.cookie.device) |
| 2325 | && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) |
| 2326 | && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) |
| 2327 | && (cdm->pos.generations[CAM_PERIPH_GENERATION] != |
| 2328 | device->generation)){ |
| 2329 | cdm->status = CAM_DEV_MATCH_LIST_CHANGED; |
| 2330 | return(0); |
| 2331 | } |
| 2332 | |
| 2333 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2334 | && (cdm->pos.cookie.bus == device->target->bus) |
| 2335 | && (cdm->pos.position_type & CAM_DEV_POS_TARGET) |
| 2336 | && (cdm->pos.cookie.target == device->target) |
| 2337 | && (cdm->pos.position_type & CAM_DEV_POS_DEVICE) |
| 2338 | && (cdm->pos.cookie.device == device) |
| 2339 | && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) |
| 2340 | && (cdm->pos.cookie.periph != NULL)) |
| 2341 | return(xptperiphtraverse(device, |
| 2342 | (struct cam_periph *)cdm->pos.cookie.periph, |
| 2343 | xptedtperiphfunc, arg)); |
| 2344 | else |
| 2345 | return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg)); |
| 2346 | } |
| 2347 | |
| 2348 | static int |
| 2349 | xptedtperiphfunc(struct cam_periph *periph, void *arg) |
| 2350 | { |
| 2351 | struct ccb_dev_match *cdm; |
| 2352 | dev_match_ret retval; |
| 2353 | |
| 2354 | cdm = (struct ccb_dev_match *)arg; |
| 2355 | |
| 2356 | retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); |
| 2357 | |
| 2358 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { |
| 2359 | cdm->status = CAM_DEV_MATCH_ERROR; |
| 2360 | return(0); |
| 2361 | } |
| 2362 | |
| 2363 | /* |
| 2364 | * If the copy flag is set, copy this peripheral out. |
| 2365 | */ |
| 2366 | if (retval & DM_RET_COPY) { |
| 2367 | int spaceleft, j; |
| 2368 | |
| 2369 | spaceleft = cdm->match_buf_len - (cdm->num_matches * |
| 2370 | sizeof(struct dev_match_result)); |
| 2371 | |
| 2372 | /* |
| 2373 | * If we don't have enough space to put in another |
| 2374 | * match result, save our position and tell the |
| 2375 | * user there are more devices to check. |
| 2376 | */ |
| 2377 | if (spaceleft < sizeof(struct dev_match_result)) { |
| 2378 | bzero(&cdm->pos, sizeof(cdm->pos)); |
| 2379 | cdm->pos.position_type = |
| 2380 | CAM_DEV_POS_EDT | CAM_DEV_POS_BUS | |
| 2381 | CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE | |
| 2382 | CAM_DEV_POS_PERIPH; |
| 2383 | |
| 2384 | cdm->pos.cookie.bus = periph->path->bus; |
| 2385 | cdm->pos.generations[CAM_BUS_GENERATION]= |
| 2386 | xsoftc.bus_generation; |
| 2387 | cdm->pos.cookie.target = periph->path->target; |
| 2388 | cdm->pos.generations[CAM_TARGET_GENERATION] = |
| 2389 | periph->path->bus->generation; |
| 2390 | cdm->pos.cookie.device = periph->path->device; |
| 2391 | cdm->pos.generations[CAM_DEV_GENERATION] = |
| 2392 | periph->path->target->generation; |
| 2393 | cdm->pos.cookie.periph = periph; |
| 2394 | cdm->pos.generations[CAM_PERIPH_GENERATION] = |
| 2395 | periph->path->device->generation; |
| 2396 | cdm->status = CAM_DEV_MATCH_MORE; |
| 2397 | return(0); |
| 2398 | } |
| 2399 | |
| 2400 | j = cdm->num_matches; |
| 2401 | cdm->num_matches++; |
| 2402 | cdm->matches[j].type = DEV_MATCH_PERIPH; |
| 2403 | cdm->matches[j].result.periph_result.path_id = |
| 2404 | periph->path->bus->path_id; |
| 2405 | cdm->matches[j].result.periph_result.target_id = |
| 2406 | periph->path->target->target_id; |
| 2407 | cdm->matches[j].result.periph_result.target_lun = |
| 2408 | periph->path->device->lun_id; |
| 2409 | cdm->matches[j].result.periph_result.unit_number = |
| 2410 | periph->unit_number; |
| 2411 | strncpy(cdm->matches[j].result.periph_result.periph_name, |
| 2412 | periph->periph_name, DEV_IDLEN); |
| 2413 | } |
| 2414 | |
| 2415 | return(1); |
| 2416 | } |
| 2417 | |
| 2418 | static int |
| 2419 | xptedtmatch(struct ccb_dev_match *cdm) |
| 2420 | { |
| 2421 | int ret; |
| 2422 | |
| 2423 | cdm->num_matches = 0; |
| 2424 | |
| 2425 | /* |
| 2426 | * Check the bus list generation. If it has changed, the user |
| 2427 | * needs to reset everything and start over. |
| 2428 | */ |
| 2429 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2430 | && (cdm->pos.generations[CAM_BUS_GENERATION] != 0) |
| 2431 | && (cdm->pos.generations[CAM_BUS_GENERATION] != xsoftc.bus_generation)) { |
| 2432 | cdm->status = CAM_DEV_MATCH_LIST_CHANGED; |
| 2433 | return(0); |
| 2434 | } |
| 2435 | |
| 2436 | if ((cdm->pos.position_type & CAM_DEV_POS_BUS) |
| 2437 | && (cdm->pos.cookie.bus != NULL)) |
| 2438 | ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus, |
| 2439 | xptedtbusfunc, cdm); |
| 2440 | else |
| 2441 | ret = xptbustraverse(NULL, xptedtbusfunc, cdm); |
| 2442 | |
| 2443 | /* |
| 2444 | * If we get back 0, that means that we had to stop before fully |
| 2445 | * traversing the EDT. It also means that one of the subroutines |
| 2446 | * has set the status field to the proper value. If we get back 1, |
| 2447 | * we've fully traversed the EDT and copied out any matching entries. |
| 2448 | */ |
| 2449 | if (ret == 1) |
| 2450 | cdm->status = CAM_DEV_MATCH_LAST; |
| 2451 | |
| 2452 | return(ret); |
| 2453 | } |
| 2454 | |
| 2455 | static int |
| 2456 | xptplistpdrvfunc(struct periph_driver **pdrv, void *arg) |
| 2457 | { |
| 2458 | struct ccb_dev_match *cdm; |
| 2459 | |
| 2460 | cdm = (struct ccb_dev_match *)arg; |
| 2461 | |
| 2462 | if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) |
| 2463 | && (cdm->pos.cookie.pdrv == pdrv) |
| 2464 | && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) |
| 2465 | && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0) |
| 2466 | && (cdm->pos.generations[CAM_PERIPH_GENERATION] != |
| 2467 | (*pdrv)->generation)) { |
| 2468 | cdm->status = CAM_DEV_MATCH_LIST_CHANGED; |
| 2469 | return(0); |
| 2470 | } |
| 2471 | |
| 2472 | if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) |
| 2473 | && (cdm->pos.cookie.pdrv == pdrv) |
| 2474 | && (cdm->pos.position_type & CAM_DEV_POS_PERIPH) |
| 2475 | && (cdm->pos.cookie.periph != NULL)) |
| 2476 | return(xptpdperiphtraverse(pdrv, |
| 2477 | (struct cam_periph *)cdm->pos.cookie.periph, |
| 2478 | xptplistperiphfunc, arg)); |
| 2479 | else |
| 2480 | return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg)); |
| 2481 | } |
| 2482 | |
| 2483 | static int |
| 2484 | xptplistperiphfunc(struct cam_periph *periph, void *arg) |
| 2485 | { |
| 2486 | struct ccb_dev_match *cdm; |
| 2487 | dev_match_ret retval; |
| 2488 | |
| 2489 | cdm = (struct ccb_dev_match *)arg; |
| 2490 | |
| 2491 | retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph); |
| 2492 | |
| 2493 | if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) { |
| 2494 | cdm->status = CAM_DEV_MATCH_ERROR; |
| 2495 | return(0); |
| 2496 | } |
| 2497 | |
| 2498 | /* |
| 2499 | * If the copy flag is set, copy this peripheral out. |
| 2500 | */ |
| 2501 | if (retval & DM_RET_COPY) { |
| 2502 | int spaceleft, j; |
| 2503 | |
| 2504 | spaceleft = cdm->match_buf_len - (cdm->num_matches * |
| 2505 | sizeof(struct dev_match_result)); |
| 2506 | |
| 2507 | /* |
| 2508 | * If we don't have enough space to put in another |
| 2509 | * match result, save our position and tell the |
| 2510 | * user there are more devices to check. |
| 2511 | */ |
| 2512 | if (spaceleft < sizeof(struct dev_match_result)) { |
| 2513 | struct periph_driver **pdrv; |
| 2514 | |
| 2515 | pdrv = NULL; |
| 2516 | bzero(&cdm->pos, sizeof(cdm->pos)); |
| 2517 | cdm->pos.position_type = |
| 2518 | CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR | |
| 2519 | CAM_DEV_POS_PERIPH; |
| 2520 | |
| 2521 | /* |
| 2522 | * This may look a bit non-sensical, but it is |
| 2523 | * actually quite logical. There are very few |
| 2524 | * peripheral drivers, and bloating every peripheral |
| 2525 | * structure with a pointer back to its parent |
| 2526 | * peripheral driver linker set entry would cost |
| 2527 | * more in the long run than doing this quick lookup. |
| 2528 | */ |
| 2529 | for (pdrv = periph_drivers; *pdrv != NULL; pdrv++) { |
| 2530 | if (strcmp((*pdrv)->driver_name, |
| 2531 | periph->periph_name) == 0) |
| 2532 | break; |
| 2533 | } |
| 2534 | |
| 2535 | if (*pdrv == NULL) { |
| 2536 | cdm->status = CAM_DEV_MATCH_ERROR; |
| 2537 | return(0); |
| 2538 | } |
| 2539 | |
| 2540 | cdm->pos.cookie.pdrv = pdrv; |
| 2541 | /* |
| 2542 | * The periph generation slot does double duty, as |
| 2543 | * does the periph pointer slot. They are used for |
| 2544 | * both edt and pdrv lookups and positioning. |
| 2545 | */ |
| 2546 | cdm->pos.cookie.periph = periph; |
| 2547 | cdm->pos.generations[CAM_PERIPH_GENERATION] = |
| 2548 | (*pdrv)->generation; |
| 2549 | cdm->status = CAM_DEV_MATCH_MORE; |
| 2550 | return(0); |
| 2551 | } |
| 2552 | |
| 2553 | j = cdm->num_matches; |
| 2554 | cdm->num_matches++; |
| 2555 | cdm->matches[j].type = DEV_MATCH_PERIPH; |
| 2556 | cdm->matches[j].result.periph_result.path_id = |
| 2557 | periph->path->bus->path_id; |
| 2558 | |
| 2559 | /* |
| 2560 | * The transport layer peripheral doesn't have a target or |
| 2561 | * lun. |
| 2562 | */ |
| 2563 | if (periph->path->target) |
| 2564 | cdm->matches[j].result.periph_result.target_id = |
| 2565 | periph->path->target->target_id; |
| 2566 | else |
| 2567 | cdm->matches[j].result.periph_result.target_id = -1; |
| 2568 | |
| 2569 | if (periph->path->device) |
| 2570 | cdm->matches[j].result.periph_result.target_lun = |
| 2571 | periph->path->device->lun_id; |
| 2572 | else |
| 2573 | cdm->matches[j].result.periph_result.target_lun = -1; |
| 2574 | |
| 2575 | cdm->matches[j].result.periph_result.unit_number = |
| 2576 | periph->unit_number; |
| 2577 | strncpy(cdm->matches[j].result.periph_result.periph_name, |
| 2578 | periph->periph_name, DEV_IDLEN); |
| 2579 | } |
| 2580 | |
| 2581 | return(1); |
| 2582 | } |
| 2583 | |
| 2584 | static int |
| 2585 | xptperiphlistmatch(struct ccb_dev_match *cdm) |
| 2586 | { |
| 2587 | int ret; |
| 2588 | |
| 2589 | cdm->num_matches = 0; |
| 2590 | |
| 2591 | /* |
| 2592 | * At this point in the edt traversal function, we check the bus |
| 2593 | * list generation to make sure that no busses have been added or |
| 2594 | * removed since the user last sent a XPT_DEV_MATCH ccb through. |
| 2595 | * For the peripheral driver list traversal function, however, we |
| 2596 | * don't have to worry about new peripheral driver types coming or |
| 2597 | * going; they're in a linker set, and therefore can't change |
| 2598 | * without a recompile. |
| 2599 | */ |
| 2600 | |
| 2601 | if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR) |
| 2602 | && (cdm->pos.cookie.pdrv != NULL)) |
| 2603 | ret = xptpdrvtraverse( |
| 2604 | (struct periph_driver **)cdm->pos.cookie.pdrv, |
| 2605 | xptplistpdrvfunc, cdm); |
| 2606 | else |
| 2607 | ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm); |
| 2608 | |
| 2609 | /* |
| 2610 | * If we get back 0, that means that we had to stop before fully |
| 2611 | * traversing the peripheral driver tree. It also means that one of |
| 2612 | * the subroutines has set the status field to the proper value. If |
| 2613 | * we get back 1, we've fully traversed the EDT and copied out any |
| 2614 | * matching entries. |
| 2615 | */ |
| 2616 | if (ret == 1) |
| 2617 | cdm->status = CAM_DEV_MATCH_LAST; |
| 2618 | |
| 2619 | return(ret); |
| 2620 | } |
| 2621 | |
| 2622 | static int |
| 2623 | xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg) |
| 2624 | { |
| 2625 | struct cam_eb *bus, *next_bus; |
| 2626 | int retval; |
| 2627 | |
| 2628 | retval = 1; |
| 2629 | |
| 2630 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 2631 | for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses)); |
| 2632 | bus != NULL; |
| 2633 | bus = next_bus) { |
| 2634 | next_bus = TAILQ_NEXT(bus, links); |
| 2635 | |
| 2636 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 2637 | CAM_SIM_LOCK(bus->sim); |
| 2638 | retval = tr_func(bus, arg); |
| 2639 | CAM_SIM_UNLOCK(bus->sim); |
| 2640 | if (retval == 0) |
| 2641 | return(retval); |
| 2642 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 2643 | } |
| 2644 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 2645 | |
| 2646 | return(retval); |
| 2647 | } |
| 2648 | |
| 2649 | static int |
| 2650 | xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target, |
| 2651 | xpt_targetfunc_t *tr_func, void *arg) |
| 2652 | { |
| 2653 | struct cam_et *target, *next_target; |
| 2654 | int retval; |
| 2655 | |
| 2656 | retval = 1; |
| 2657 | for (target = (start_target ? start_target : |
| 2658 | TAILQ_FIRST(&bus->et_entries)); |
| 2659 | target != NULL; target = next_target) { |
| 2660 | |
| 2661 | next_target = TAILQ_NEXT(target, links); |
| 2662 | |
| 2663 | retval = tr_func(target, arg); |
| 2664 | |
| 2665 | if (retval == 0) |
| 2666 | return(retval); |
| 2667 | } |
| 2668 | |
| 2669 | return(retval); |
| 2670 | } |
| 2671 | |
| 2672 | static int |
| 2673 | xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device, |
| 2674 | xpt_devicefunc_t *tr_func, void *arg) |
| 2675 | { |
| 2676 | struct cam_ed *device, *next_device; |
| 2677 | int retval; |
| 2678 | |
| 2679 | retval = 1; |
| 2680 | for (device = (start_device ? start_device : |
| 2681 | TAILQ_FIRST(&target->ed_entries)); |
| 2682 | device != NULL; |
| 2683 | device = next_device) { |
| 2684 | |
| 2685 | next_device = TAILQ_NEXT(device, links); |
| 2686 | |
| 2687 | retval = tr_func(device, arg); |
| 2688 | |
| 2689 | if (retval == 0) |
| 2690 | return(retval); |
| 2691 | } |
| 2692 | |
| 2693 | return(retval); |
| 2694 | } |
| 2695 | |
| 2696 | static int |
| 2697 | xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph, |
| 2698 | xpt_periphfunc_t *tr_func, void *arg) |
| 2699 | { |
| 2700 | struct cam_periph *periph, *next_periph; |
| 2701 | int retval; |
| 2702 | |
| 2703 | retval = 1; |
| 2704 | |
| 2705 | for (periph = (start_periph ? start_periph : |
| 2706 | SLIST_FIRST(&device->periphs)); |
| 2707 | periph != NULL; |
| 2708 | periph = next_periph) { |
| 2709 | |
| 2710 | next_periph = SLIST_NEXT(periph, periph_links); |
| 2711 | |
| 2712 | retval = tr_func(periph, arg); |
| 2713 | if (retval == 0) |
| 2714 | return(retval); |
| 2715 | } |
| 2716 | |
| 2717 | return(retval); |
| 2718 | } |
| 2719 | |
| 2720 | static int |
| 2721 | xptpdrvtraverse(struct periph_driver **start_pdrv, |
| 2722 | xpt_pdrvfunc_t *tr_func, void *arg) |
| 2723 | { |
| 2724 | struct periph_driver **pdrv; |
| 2725 | int retval; |
| 2726 | |
| 2727 | retval = 1; |
| 2728 | |
| 2729 | /* |
| 2730 | * We don't traverse the peripheral driver list like we do the |
| 2731 | * other lists, because it is a linker set, and therefore cannot be |
| 2732 | * changed during runtime. If the peripheral driver list is ever |
| 2733 | * re-done to be something other than a linker set (i.e. it can |
| 2734 | * change while the system is running), the list traversal should |
| 2735 | * be modified to work like the other traversal functions. |
| 2736 | */ |
| 2737 | for (pdrv = (start_pdrv ? start_pdrv : periph_drivers); |
| 2738 | *pdrv != NULL; pdrv++) { |
| 2739 | retval = tr_func(pdrv, arg); |
| 2740 | |
| 2741 | if (retval == 0) |
| 2742 | return(retval); |
| 2743 | } |
| 2744 | |
| 2745 | return(retval); |
| 2746 | } |
| 2747 | |
| 2748 | static int |
| 2749 | xptpdperiphtraverse(struct periph_driver **pdrv, |
| 2750 | struct cam_periph *start_periph, |
| 2751 | xpt_periphfunc_t *tr_func, void *arg) |
| 2752 | { |
| 2753 | struct cam_periph *periph, *next_periph; |
| 2754 | int retval; |
| 2755 | |
| 2756 | retval = 1; |
| 2757 | |
| 2758 | for (periph = (start_periph ? start_periph : |
| 2759 | TAILQ_FIRST(&(*pdrv)->units)); periph != NULL; |
| 2760 | periph = next_periph) { |
| 2761 | |
| 2762 | next_periph = TAILQ_NEXT(periph, unit_links); |
| 2763 | |
| 2764 | retval = tr_func(periph, arg); |
| 2765 | if (retval == 0) |
| 2766 | return(retval); |
| 2767 | } |
| 2768 | return(retval); |
| 2769 | } |
| 2770 | |
| 2771 | static int |
| 2772 | xptdefbusfunc(struct cam_eb *bus, void *arg) |
| 2773 | { |
| 2774 | struct xpt_traverse_config *tr_config; |
| 2775 | |
| 2776 | tr_config = (struct xpt_traverse_config *)arg; |
| 2777 | |
| 2778 | if (tr_config->depth == XPT_DEPTH_BUS) { |
| 2779 | xpt_busfunc_t *tr_func; |
| 2780 | |
| 2781 | tr_func = (xpt_busfunc_t *)tr_config->tr_func; |
| 2782 | |
| 2783 | return(tr_func(bus, tr_config->tr_arg)); |
| 2784 | } else |
| 2785 | return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg)); |
| 2786 | } |
| 2787 | |
| 2788 | static int |
| 2789 | xptdeftargetfunc(struct cam_et *target, void *arg) |
| 2790 | { |
| 2791 | struct xpt_traverse_config *tr_config; |
| 2792 | |
| 2793 | tr_config = (struct xpt_traverse_config *)arg; |
| 2794 | |
| 2795 | if (tr_config->depth == XPT_DEPTH_TARGET) { |
| 2796 | xpt_targetfunc_t *tr_func; |
| 2797 | |
| 2798 | tr_func = (xpt_targetfunc_t *)tr_config->tr_func; |
| 2799 | |
| 2800 | return(tr_func(target, tr_config->tr_arg)); |
| 2801 | } else |
| 2802 | return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg)); |
| 2803 | } |
| 2804 | |
| 2805 | static int |
| 2806 | xptdefdevicefunc(struct cam_ed *device, void *arg) |
| 2807 | { |
| 2808 | struct xpt_traverse_config *tr_config; |
| 2809 | |
| 2810 | tr_config = (struct xpt_traverse_config *)arg; |
| 2811 | |
| 2812 | if (tr_config->depth == XPT_DEPTH_DEVICE) { |
| 2813 | xpt_devicefunc_t *tr_func; |
| 2814 | |
| 2815 | tr_func = (xpt_devicefunc_t *)tr_config->tr_func; |
| 2816 | |
| 2817 | return(tr_func(device, tr_config->tr_arg)); |
| 2818 | } else |
| 2819 | return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg)); |
| 2820 | } |
| 2821 | |
| 2822 | static int |
| 2823 | xptdefperiphfunc(struct cam_periph *periph, void *arg) |
| 2824 | { |
| 2825 | struct xpt_traverse_config *tr_config; |
| 2826 | xpt_periphfunc_t *tr_func; |
| 2827 | |
| 2828 | tr_config = (struct xpt_traverse_config *)arg; |
| 2829 | |
| 2830 | tr_func = (xpt_periphfunc_t *)tr_config->tr_func; |
| 2831 | |
| 2832 | /* |
| 2833 | * Unlike the other default functions, we don't check for depth |
| 2834 | * here. The peripheral driver level is the last level in the EDT, |
| 2835 | * so if we're here, we should execute the function in question. |
| 2836 | */ |
| 2837 | return(tr_func(periph, tr_config->tr_arg)); |
| 2838 | } |
| 2839 | |
| 2840 | /* |
| 2841 | * Execute the given function for every bus in the EDT. |
| 2842 | */ |
| 2843 | static int |
| 2844 | xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg) |
| 2845 | { |
| 2846 | struct xpt_traverse_config tr_config; |
| 2847 | |
| 2848 | tr_config.depth = XPT_DEPTH_BUS; |
| 2849 | tr_config.tr_func = tr_func; |
| 2850 | tr_config.tr_arg = arg; |
| 2851 | |
| 2852 | return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); |
| 2853 | } |
| 2854 | |
| 2855 | /* |
| 2856 | * Execute the given function for every device in the EDT. |
| 2857 | */ |
| 2858 | static int |
| 2859 | xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg) |
| 2860 | { |
| 2861 | struct xpt_traverse_config tr_config; |
| 2862 | |
| 2863 | tr_config.depth = XPT_DEPTH_DEVICE; |
| 2864 | tr_config.tr_func = tr_func; |
| 2865 | tr_config.tr_arg = arg; |
| 2866 | |
| 2867 | return(xptbustraverse(NULL, xptdefbusfunc, &tr_config)); |
| 2868 | } |
| 2869 | |
| 2870 | static int |
| 2871 | xptsetasyncfunc(struct cam_ed *device, void *arg) |
| 2872 | { |
| 2873 | struct cam_path path; |
| 2874 | struct ccb_getdev cgd; |
| 2875 | struct async_node *cur_entry; |
| 2876 | |
| 2877 | cur_entry = (struct async_node *)arg; |
| 2878 | |
| 2879 | /* |
| 2880 | * Don't report unconfigured devices (Wildcard devs, |
| 2881 | * devices only for target mode, device instances |
| 2882 | * that have been invalidated but are waiting for |
| 2883 | * their last reference count to be released). |
| 2884 | */ |
| 2885 | if ((device->flags & CAM_DEV_UNCONFIGURED) != 0) |
| 2886 | return (1); |
| 2887 | |
| 2888 | xpt_compile_path(&path, |
| 2889 | NULL, |
| 2890 | device->target->bus->path_id, |
| 2891 | device->target->target_id, |
| 2892 | device->lun_id); |
| 2893 | xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1); |
| 2894 | cgd.ccb_h.func_code = XPT_GDEV_TYPE; |
| 2895 | xpt_action((union ccb *)&cgd); |
| 2896 | cur_entry->callback(cur_entry->callback_arg, |
| 2897 | AC_FOUND_DEVICE, |
| 2898 | &path, &cgd); |
| 2899 | xpt_release_path(&path); |
| 2900 | |
| 2901 | return(1); |
| 2902 | } |
| 2903 | |
| 2904 | static int |
| 2905 | xptsetasyncbusfunc(struct cam_eb *bus, void *arg) |
| 2906 | { |
| 2907 | struct cam_path path; |
| 2908 | struct ccb_pathinq cpi; |
| 2909 | struct async_node *cur_entry; |
| 2910 | |
| 2911 | cur_entry = (struct async_node *)arg; |
| 2912 | |
| 2913 | xpt_compile_path(&path, /*periph*/NULL, |
| 2914 | bus->sim->path_id, |
| 2915 | CAM_TARGET_WILDCARD, |
| 2916 | CAM_LUN_WILDCARD); |
| 2917 | xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); |
| 2918 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 2919 | xpt_action((union ccb *)&cpi); |
| 2920 | cur_entry->callback(cur_entry->callback_arg, |
| 2921 | AC_PATH_REGISTERED, |
| 2922 | &path, &cpi); |
| 2923 | xpt_release_path(&path); |
| 2924 | |
| 2925 | return(1); |
| 2926 | } |
| 2927 | |
| 2928 | static void |
| 2929 | xpt_action_sasync_cb(void *context, int pending) |
| 2930 | { |
| 2931 | struct async_node *cur_entry; |
| 2932 | struct xpt_task *task; |
| 2933 | uint32_t added; |
| 2934 | |
| 2935 | task = (struct xpt_task *)context; |
| 2936 | cur_entry = (struct async_node *)task->data1; |
| 2937 | added = task->data2; |
| 2938 | |
| 2939 | if ((added & AC_FOUND_DEVICE) != 0) { |
| 2940 | /* |
| 2941 | * Get this peripheral up to date with all |
| 2942 | * the currently existing devices. |
| 2943 | */ |
| 2944 | xpt_for_all_devices(xptsetasyncfunc, cur_entry); |
| 2945 | } |
| 2946 | if ((added & AC_PATH_REGISTERED) != 0) { |
| 2947 | /* |
| 2948 | * Get this peripheral up to date with all |
| 2949 | * the currently existing busses. |
| 2950 | */ |
| 2951 | xpt_for_all_busses(xptsetasyncbusfunc, cur_entry); |
| 2952 | } |
| 2953 | kfree(task, M_CAMXPT); |
| 2954 | } |
| 2955 | |
| 2956 | void |
| 2957 | xpt_action(union ccb *start_ccb) |
| 2958 | { |
| 2959 | CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n")); |
| 2960 | |
| 2961 | start_ccb->ccb_h.status = CAM_REQ_INPROG; |
| 2962 | |
| 2963 | switch (start_ccb->ccb_h.func_code) { |
| 2964 | case XPT_SCSI_IO: |
| 2965 | case XPT_TRIM: |
| 2966 | { |
| 2967 | struct cam_ed *device; |
| 2968 | #ifdef CAMDEBUG |
| 2969 | char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; |
| 2970 | struct cam_path *path; |
| 2971 | |
| 2972 | path = start_ccb->ccb_h.path; |
| 2973 | #endif |
| 2974 | |
| 2975 | /* |
| 2976 | * For the sake of compatibility with SCSI-1 |
| 2977 | * devices that may not understand the identify |
| 2978 | * message, we include lun information in the |
| 2979 | * second byte of all commands. SCSI-1 specifies |
| 2980 | * that luns are a 3 bit value and reserves only 3 |
| 2981 | * bits for lun information in the CDB. Later |
| 2982 | * revisions of the SCSI spec allow for more than 8 |
| 2983 | * luns, but have deprecated lun information in the |
| 2984 | * CDB. So, if the lun won't fit, we must omit. |
| 2985 | * |
| 2986 | * Also be aware that during initial probing for devices, |
| 2987 | * the inquiry information is unknown but initialized to 0. |
| 2988 | * This means that this code will be exercised while probing |
| 2989 | * devices with an ANSI revision greater than 2. |
| 2990 | */ |
| 2991 | device = start_ccb->ccb_h.path->device; |
| 2992 | if (device->protocol_version <= SCSI_REV_2 |
| 2993 | && start_ccb->ccb_h.target_lun < 8 |
| 2994 | && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) { |
| 2995 | |
| 2996 | start_ccb->csio.cdb_io.cdb_bytes[1] |= |
| 2997 | start_ccb->ccb_h.target_lun << 5; |
| 2998 | } |
| 2999 | start_ccb->csio.scsi_status = SCSI_STATUS_OK; |
| 3000 | CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n", |
| 3001 | scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0], |
| 3002 | &path->device->inq_data), |
| 3003 | scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes, |
| 3004 | cdb_str, sizeof(cdb_str)))); |
| 3005 | /* FALLTHROUGH */ |
| 3006 | } |
| 3007 | case XPT_TARGET_IO: |
| 3008 | case XPT_CONT_TARGET_IO: |
| 3009 | start_ccb->csio.sense_resid = 0; |
| 3010 | start_ccb->csio.resid = 0; |
| 3011 | /* FALLTHROUGH */ |
| 3012 | case XPT_RESET_DEV: |
| 3013 | case XPT_ENG_EXEC: |
| 3014 | { |
| 3015 | struct cam_path *path; |
| 3016 | struct cam_sim *sim; |
| 3017 | int runq; |
| 3018 | |
| 3019 | path = start_ccb->ccb_h.path; |
| 3020 | |
| 3021 | sim = path->bus->sim; |
| 3022 | if (sim == &cam_dead_sim) { |
| 3023 | /* The SIM has gone; just execute the CCB directly. */ |
| 3024 | cam_ccbq_send_ccb(&path->device->ccbq, start_ccb); |
| 3025 | (*(sim->sim_action))(sim, start_ccb); |
| 3026 | break; |
| 3027 | } |
| 3028 | |
| 3029 | cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb); |
| 3030 | if (path->device->qfrozen_cnt == 0) |
| 3031 | runq = xpt_schedule_dev_sendq(path->bus, path->device); |
| 3032 | else |
| 3033 | runq = 0; |
| 3034 | if (runq != 0) |
| 3035 | xpt_run_dev_sendq(path->bus); |
| 3036 | break; |
| 3037 | } |
| 3038 | case XPT_SET_TRAN_SETTINGS: |
| 3039 | { |
| 3040 | xpt_set_transfer_settings(&start_ccb->cts, |
| 3041 | start_ccb->ccb_h.path->device, |
| 3042 | /*async_update*/FALSE); |
| 3043 | break; |
| 3044 | } |
| 3045 | case XPT_CALC_GEOMETRY: |
| 3046 | { |
| 3047 | struct cam_sim *sim; |
| 3048 | |
| 3049 | /* Filter out garbage */ |
| 3050 | if (start_ccb->ccg.block_size == 0 |
| 3051 | || start_ccb->ccg.volume_size == 0) { |
| 3052 | start_ccb->ccg.cylinders = 0; |
| 3053 | start_ccb->ccg.heads = 0; |
| 3054 | start_ccb->ccg.secs_per_track = 0; |
| 3055 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3056 | break; |
| 3057 | } |
| 3058 | sim = start_ccb->ccb_h.path->bus->sim; |
| 3059 | (*(sim->sim_action))(sim, start_ccb); |
| 3060 | break; |
| 3061 | } |
| 3062 | case XPT_ABORT: |
| 3063 | { |
| 3064 | union ccb* abort_ccb; |
| 3065 | |
| 3066 | abort_ccb = start_ccb->cab.abort_ccb; |
| 3067 | if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) { |
| 3068 | |
| 3069 | if (abort_ccb->ccb_h.pinfo.index >= 0) { |
| 3070 | struct cam_ccbq *ccbq; |
| 3071 | |
| 3072 | ccbq = &abort_ccb->ccb_h.path->device->ccbq; |
| 3073 | cam_ccbq_remove_ccb(ccbq, abort_ccb); |
| 3074 | abort_ccb->ccb_h.status = |
| 3075 | CAM_REQ_ABORTED|CAM_DEV_QFRZN; |
| 3076 | xpt_freeze_devq(abort_ccb->ccb_h.path, 1); |
| 3077 | xpt_done(abort_ccb); |
| 3078 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3079 | break; |
| 3080 | } |
| 3081 | if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX |
| 3082 | && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) { |
| 3083 | /* |
| 3084 | * We've caught this ccb en route to |
| 3085 | * the SIM. Flag it for abort and the |
| 3086 | * SIM will do so just before starting |
| 3087 | * real work on the CCB. |
| 3088 | */ |
| 3089 | abort_ccb->ccb_h.status = |
| 3090 | CAM_REQ_ABORTED|CAM_DEV_QFRZN; |
| 3091 | xpt_freeze_devq(abort_ccb->ccb_h.path, 1); |
| 3092 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3093 | break; |
| 3094 | } |
| 3095 | } |
| 3096 | if (XPT_FC_IS_QUEUED(abort_ccb) |
| 3097 | && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) { |
| 3098 | /* |
| 3099 | * It's already completed but waiting |
| 3100 | * for our SWI to get to it. |
| 3101 | */ |
| 3102 | start_ccb->ccb_h.status = CAM_UA_ABORT; |
| 3103 | break; |
| 3104 | } |
| 3105 | /* |
| 3106 | * If we weren't able to take care of the abort request |
| 3107 | * in the XPT, pass the request down to the SIM for processing. |
| 3108 | */ |
| 3109 | /* FALLTHROUGH */ |
| 3110 | } |
| 3111 | case XPT_ACCEPT_TARGET_IO: |
| 3112 | case XPT_EN_LUN: |
| 3113 | case XPT_IMMED_NOTIFY: |
| 3114 | case XPT_NOTIFY_ACK: |
| 3115 | case XPT_GET_TRAN_SETTINGS: |
| 3116 | case XPT_RESET_BUS: |
| 3117 | { |
| 3118 | struct cam_sim *sim; |
| 3119 | |
| 3120 | sim = start_ccb->ccb_h.path->bus->sim; |
| 3121 | (*(sim->sim_action))(sim, start_ccb); |
| 3122 | break; |
| 3123 | } |
| 3124 | case XPT_PATH_INQ: |
| 3125 | { |
| 3126 | struct cam_sim *sim; |
| 3127 | |
| 3128 | sim = start_ccb->ccb_h.path->bus->sim; |
| 3129 | (*(sim->sim_action))(sim, start_ccb); |
| 3130 | break; |
| 3131 | } |
| 3132 | case XPT_PATH_STATS: |
| 3133 | start_ccb->cpis.last_reset = |
| 3134 | start_ccb->ccb_h.path->bus->last_reset; |
| 3135 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3136 | break; |
| 3137 | case XPT_GDEV_TYPE: |
| 3138 | { |
| 3139 | struct cam_ed *dev; |
| 3140 | |
| 3141 | dev = start_ccb->ccb_h.path->device; |
| 3142 | if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { |
| 3143 | start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; |
| 3144 | } else { |
| 3145 | struct ccb_getdev *cgd; |
| 3146 | struct cam_eb *bus; |
| 3147 | struct cam_et *tar; |
| 3148 | |
| 3149 | cgd = &start_ccb->cgd; |
| 3150 | bus = cgd->ccb_h.path->bus; |
| 3151 | tar = cgd->ccb_h.path->target; |
| 3152 | cgd->inq_data = dev->inq_data; |
| 3153 | cgd->ccb_h.status = CAM_REQ_CMP; |
| 3154 | cgd->serial_num_len = dev->serial_num_len; |
| 3155 | if ((dev->serial_num_len > 0) |
| 3156 | && (dev->serial_num != NULL)) |
| 3157 | bcopy(dev->serial_num, cgd->serial_num, |
| 3158 | dev->serial_num_len); |
| 3159 | } |
| 3160 | break; |
| 3161 | } |
| 3162 | case XPT_GDEV_STATS: |
| 3163 | { |
| 3164 | struct cam_ed *dev; |
| 3165 | |
| 3166 | dev = start_ccb->ccb_h.path->device; |
| 3167 | if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) { |
| 3168 | start_ccb->ccb_h.status = CAM_DEV_NOT_THERE; |
| 3169 | } else { |
| 3170 | struct ccb_getdevstats *cgds; |
| 3171 | struct cam_eb *bus; |
| 3172 | struct cam_et *tar; |
| 3173 | |
| 3174 | cgds = &start_ccb->cgds; |
| 3175 | bus = cgds->ccb_h.path->bus; |
| 3176 | tar = cgds->ccb_h.path->target; |
| 3177 | cgds->dev_openings = dev->ccbq.dev_openings; |
| 3178 | cgds->dev_active = dev->ccbq.dev_active; |
| 3179 | cgds->devq_openings = dev->ccbq.devq_openings; |
| 3180 | cgds->devq_queued = dev->ccbq.queue.entries; |
| 3181 | cgds->held = dev->ccbq.held; |
| 3182 | cgds->last_reset = tar->last_reset; |
| 3183 | cgds->maxtags = dev->quirk->maxtags; |
| 3184 | cgds->mintags = dev->quirk->mintags; |
| 3185 | if (timevalcmp(&tar->last_reset, &bus->last_reset, <)) |
| 3186 | cgds->last_reset = bus->last_reset; |
| 3187 | cgds->ccb_h.status = CAM_REQ_CMP; |
| 3188 | } |
| 3189 | break; |
| 3190 | } |
| 3191 | case XPT_GDEVLIST: |
| 3192 | { |
| 3193 | struct cam_periph *nperiph; |
| 3194 | struct periph_list *periph_head; |
| 3195 | struct ccb_getdevlist *cgdl; |
| 3196 | u_int i; |
| 3197 | struct cam_ed *device; |
| 3198 | int found; |
| 3199 | |
| 3200 | |
| 3201 | found = 0; |
| 3202 | |
| 3203 | /* |
| 3204 | * Don't want anyone mucking with our data. |
| 3205 | */ |
| 3206 | device = start_ccb->ccb_h.path->device; |
| 3207 | periph_head = &device->periphs; |
| 3208 | cgdl = &start_ccb->cgdl; |
| 3209 | |
| 3210 | /* |
| 3211 | * Check and see if the list has changed since the user |
| 3212 | * last requested a list member. If so, tell them that the |
| 3213 | * list has changed, and therefore they need to start over |
| 3214 | * from the beginning. |
| 3215 | */ |
| 3216 | if ((cgdl->index != 0) && |
| 3217 | (cgdl->generation != device->generation)) { |
| 3218 | cgdl->status = CAM_GDEVLIST_LIST_CHANGED; |
| 3219 | break; |
| 3220 | } |
| 3221 | |
| 3222 | /* |
| 3223 | * Traverse the list of peripherals and attempt to find |
| 3224 | * the requested peripheral. |
| 3225 | */ |
| 3226 | for (nperiph = SLIST_FIRST(periph_head), i = 0; |
| 3227 | (nperiph != NULL) && (i <= cgdl->index); |
| 3228 | nperiph = SLIST_NEXT(nperiph, periph_links), i++) { |
| 3229 | if (i == cgdl->index) { |
| 3230 | strncpy(cgdl->periph_name, |
| 3231 | nperiph->periph_name, |
| 3232 | DEV_IDLEN); |
| 3233 | cgdl->unit_number = nperiph->unit_number; |
| 3234 | found = 1; |
| 3235 | } |
| 3236 | } |
| 3237 | if (found == 0) { |
| 3238 | cgdl->status = CAM_GDEVLIST_ERROR; |
| 3239 | break; |
| 3240 | } |
| 3241 | |
| 3242 | if (nperiph == NULL) |
| 3243 | cgdl->status = CAM_GDEVLIST_LAST_DEVICE; |
| 3244 | else |
| 3245 | cgdl->status = CAM_GDEVLIST_MORE_DEVS; |
| 3246 | |
| 3247 | cgdl->index++; |
| 3248 | cgdl->generation = device->generation; |
| 3249 | |
| 3250 | cgdl->ccb_h.status = CAM_REQ_CMP; |
| 3251 | break; |
| 3252 | } |
| 3253 | case XPT_DEV_MATCH: |
| 3254 | { |
| 3255 | dev_pos_type position_type; |
| 3256 | struct ccb_dev_match *cdm; |
| 3257 | int ret; |
| 3258 | |
| 3259 | cdm = &start_ccb->cdm; |
| 3260 | |
| 3261 | /* |
| 3262 | * There are two ways of getting at information in the EDT. |
| 3263 | * The first way is via the primary EDT tree. It starts |
| 3264 | * with a list of busses, then a list of targets on a bus, |
| 3265 | * then devices/luns on a target, and then peripherals on a |
| 3266 | * device/lun. The "other" way is by the peripheral driver |
| 3267 | * lists. The peripheral driver lists are organized by |
| 3268 | * peripheral driver. (obviously) So it makes sense to |
| 3269 | * use the peripheral driver list if the user is looking |
| 3270 | * for something like "da1", or all "da" devices. If the |
| 3271 | * user is looking for something on a particular bus/target |
| 3272 | * or lun, it's generally better to go through the EDT tree. |
| 3273 | */ |
| 3274 | |
| 3275 | if (cdm->pos.position_type != CAM_DEV_POS_NONE) |
| 3276 | position_type = cdm->pos.position_type; |
| 3277 | else { |
| 3278 | u_int i; |
| 3279 | |
| 3280 | position_type = CAM_DEV_POS_NONE; |
| 3281 | |
| 3282 | for (i = 0; i < cdm->num_patterns; i++) { |
| 3283 | if ((cdm->patterns[i].type == DEV_MATCH_BUS) |
| 3284 | ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){ |
| 3285 | position_type = CAM_DEV_POS_EDT; |
| 3286 | break; |
| 3287 | } |
| 3288 | } |
| 3289 | |
| 3290 | if (cdm->num_patterns == 0) |
| 3291 | position_type = CAM_DEV_POS_EDT; |
| 3292 | else if (position_type == CAM_DEV_POS_NONE) |
| 3293 | position_type = CAM_DEV_POS_PDRV; |
| 3294 | } |
| 3295 | |
| 3296 | switch(position_type & CAM_DEV_POS_TYPEMASK) { |
| 3297 | case CAM_DEV_POS_EDT: |
| 3298 | ret = xptedtmatch(cdm); |
| 3299 | break; |
| 3300 | case CAM_DEV_POS_PDRV: |
| 3301 | ret = xptperiphlistmatch(cdm); |
| 3302 | break; |
| 3303 | default: |
| 3304 | cdm->status = CAM_DEV_MATCH_ERROR; |
| 3305 | break; |
| 3306 | } |
| 3307 | |
| 3308 | if (cdm->status == CAM_DEV_MATCH_ERROR) |
| 3309 | start_ccb->ccb_h.status = CAM_REQ_CMP_ERR; |
| 3310 | else |
| 3311 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3312 | |
| 3313 | break; |
| 3314 | } |
| 3315 | case XPT_SASYNC_CB: |
| 3316 | { |
| 3317 | struct ccb_setasync *csa; |
| 3318 | struct async_node *cur_entry; |
| 3319 | struct async_list *async_head; |
| 3320 | u_int32_t added; |
| 3321 | |
| 3322 | csa = &start_ccb->csa; |
| 3323 | added = csa->event_enable; |
| 3324 | async_head = &csa->ccb_h.path->device->asyncs; |
| 3325 | |
| 3326 | /* |
| 3327 | * If there is already an entry for us, simply |
| 3328 | * update it. |
| 3329 | */ |
| 3330 | cur_entry = SLIST_FIRST(async_head); |
| 3331 | while (cur_entry != NULL) { |
| 3332 | if ((cur_entry->callback_arg == csa->callback_arg) |
| 3333 | && (cur_entry->callback == csa->callback)) |
| 3334 | break; |
| 3335 | cur_entry = SLIST_NEXT(cur_entry, links); |
| 3336 | } |
| 3337 | |
| 3338 | if (cur_entry != NULL) { |
| 3339 | /* |
| 3340 | * If the request has no flags set, |
| 3341 | * remove the entry. |
| 3342 | */ |
| 3343 | added &= ~cur_entry->event_enable; |
| 3344 | if (csa->event_enable == 0) { |
| 3345 | SLIST_REMOVE(async_head, cur_entry, |
| 3346 | async_node, links); |
| 3347 | csa->ccb_h.path->device->refcount--; |
| 3348 | kfree(cur_entry, M_CAMXPT); |
| 3349 | } else { |
| 3350 | cur_entry->event_enable = csa->event_enable; |
| 3351 | } |
| 3352 | } else { |
| 3353 | cur_entry = kmalloc(sizeof(*cur_entry), M_CAMXPT, |
| 3354 | M_INTWAIT); |
| 3355 | cur_entry->event_enable = csa->event_enable; |
| 3356 | cur_entry->callback_arg = csa->callback_arg; |
| 3357 | cur_entry->callback = csa->callback; |
| 3358 | SLIST_INSERT_HEAD(async_head, cur_entry, links); |
| 3359 | csa->ccb_h.path->device->refcount++; |
| 3360 | } |
| 3361 | |
| 3362 | /* |
| 3363 | * Need to decouple this operation via a taskqueue so that |
| 3364 | * the locking doesn't become a mess. |
| 3365 | */ |
| 3366 | if ((added & (AC_FOUND_DEVICE | AC_PATH_REGISTERED)) != 0) { |
| 3367 | struct xpt_task *task; |
| 3368 | |
| 3369 | task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, |
| 3370 | M_INTWAIT); |
| 3371 | |
| 3372 | TASK_INIT(&task->task, 0, xpt_action_sasync_cb, task); |
| 3373 | task->data1 = cur_entry; |
| 3374 | task->data2 = added; |
| 3375 | taskqueue_enqueue(taskqueue_thread[mycpuid], |
| 3376 | &task->task); |
| 3377 | } |
| 3378 | |
| 3379 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3380 | break; |
| 3381 | } |
| 3382 | case XPT_REL_SIMQ: |
| 3383 | { |
| 3384 | struct ccb_relsim *crs; |
| 3385 | struct cam_ed *dev; |
| 3386 | |
| 3387 | crs = &start_ccb->crs; |
| 3388 | dev = crs->ccb_h.path->device; |
| 3389 | if (dev == NULL) { |
| 3390 | |
| 3391 | crs->ccb_h.status = CAM_DEV_NOT_THERE; |
| 3392 | break; |
| 3393 | } |
| 3394 | |
| 3395 | if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) { |
| 3396 | |
| 3397 | if (INQ_DATA_TQ_ENABLED(&dev->inq_data)) { |
| 3398 | /* Don't ever go below one opening */ |
| 3399 | if (crs->openings > 0) { |
| 3400 | xpt_dev_ccbq_resize(crs->ccb_h.path, |
| 3401 | crs->openings); |
| 3402 | |
| 3403 | if (bootverbose) { |
| 3404 | xpt_print(crs->ccb_h.path, |
| 3405 | "tagged openings now %d\n", |
| 3406 | crs->openings); |
| 3407 | } |
| 3408 | } |
| 3409 | } |
| 3410 | } |
| 3411 | |
| 3412 | if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) { |
| 3413 | |
| 3414 | if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { |
| 3415 | |
| 3416 | /* |
| 3417 | * Just extend the old timeout and decrement |
| 3418 | * the freeze count so that a single timeout |
| 3419 | * is sufficient for releasing the queue. |
| 3420 | */ |
| 3421 | start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; |
| 3422 | callout_stop(&dev->callout); |
| 3423 | } else { |
| 3424 | |
| 3425 | start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; |
| 3426 | } |
| 3427 | |
| 3428 | callout_reset(&dev->callout, |
| 3429 | (crs->release_timeout * hz) / 1000, |
| 3430 | xpt_release_devq_timeout, dev); |
| 3431 | |
| 3432 | dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING; |
| 3433 | |
| 3434 | } |
| 3435 | |
| 3436 | if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) { |
| 3437 | |
| 3438 | if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) { |
| 3439 | /* |
| 3440 | * Decrement the freeze count so that a single |
| 3441 | * completion is still sufficient to unfreeze |
| 3442 | * the queue. |
| 3443 | */ |
| 3444 | start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; |
| 3445 | } else { |
| 3446 | |
| 3447 | dev->flags |= CAM_DEV_REL_ON_COMPLETE; |
| 3448 | start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; |
| 3449 | } |
| 3450 | } |
| 3451 | |
| 3452 | if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) { |
| 3453 | |
| 3454 | if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 |
| 3455 | || (dev->ccbq.dev_active == 0)) { |
| 3456 | |
| 3457 | start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE; |
| 3458 | } else { |
| 3459 | |
| 3460 | dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY; |
| 3461 | start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE; |
| 3462 | } |
| 3463 | } |
| 3464 | |
| 3465 | if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) { |
| 3466 | |
| 3467 | xpt_release_devq(crs->ccb_h.path, /*count*/1, |
| 3468 | /*run_queue*/TRUE); |
| 3469 | } |
| 3470 | start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt; |
| 3471 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3472 | break; |
| 3473 | } |
| 3474 | case XPT_SCAN_BUS: |
| 3475 | xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb); |
| 3476 | break; |
| 3477 | case XPT_SCAN_LUN: |
| 3478 | xpt_scan_lun(start_ccb->ccb_h.path->periph, |
| 3479 | start_ccb->ccb_h.path, start_ccb->crcn.flags, |
| 3480 | start_ccb); |
| 3481 | break; |
| 3482 | case XPT_DEBUG: { |
| 3483 | #ifdef CAMDEBUG |
| 3484 | #ifdef CAM_DEBUG_DELAY |
| 3485 | cam_debug_delay = CAM_DEBUG_DELAY; |
| 3486 | #endif |
| 3487 | cam_dflags = start_ccb->cdbg.flags; |
| 3488 | if (cam_dpath != NULL) { |
| 3489 | xpt_free_path(cam_dpath); |
| 3490 | cam_dpath = NULL; |
| 3491 | } |
| 3492 | |
| 3493 | if (cam_dflags != CAM_DEBUG_NONE) { |
| 3494 | if (xpt_create_path(&cam_dpath, xpt_periph, |
| 3495 | start_ccb->ccb_h.path_id, |
| 3496 | start_ccb->ccb_h.target_id, |
| 3497 | start_ccb->ccb_h.target_lun) != |
| 3498 | CAM_REQ_CMP) { |
| 3499 | start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
| 3500 | cam_dflags = CAM_DEBUG_NONE; |
| 3501 | } else { |
| 3502 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3503 | xpt_print(cam_dpath, "debugging flags now %x\n", |
| 3504 | cam_dflags); |
| 3505 | } |
| 3506 | } else { |
| 3507 | cam_dpath = NULL; |
| 3508 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3509 | } |
| 3510 | #else /* !CAMDEBUG */ |
| 3511 | start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; |
| 3512 | #endif /* CAMDEBUG */ |
| 3513 | break; |
| 3514 | } |
| 3515 | case XPT_NOOP: |
| 3516 | if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0) |
| 3517 | xpt_freeze_devq(start_ccb->ccb_h.path, 1); |
| 3518 | start_ccb->ccb_h.status = CAM_REQ_CMP; |
| 3519 | break; |
| 3520 | default: |
| 3521 | case XPT_SDEV_TYPE: |
| 3522 | case XPT_TERM_IO: |
| 3523 | case XPT_ENG_INQ: |
| 3524 | /* XXX Implement */ |
| 3525 | start_ccb->ccb_h.status = CAM_PROVIDE_FAIL; |
| 3526 | break; |
| 3527 | } |
| 3528 | } |
| 3529 | |
| 3530 | void |
| 3531 | xpt_polled_action(union ccb *start_ccb) |
| 3532 | { |
| 3533 | u_int32_t timeout; |
| 3534 | struct cam_sim *sim; |
| 3535 | struct cam_devq *devq; |
| 3536 | struct cam_ed *dev; |
| 3537 | |
| 3538 | timeout = start_ccb->ccb_h.timeout; |
| 3539 | sim = start_ccb->ccb_h.path->bus->sim; |
| 3540 | devq = sim->devq; |
| 3541 | dev = start_ccb->ccb_h.path->device; |
| 3542 | |
| 3543 | sim_lock_assert_owned(sim->lock); |
| 3544 | |
| 3545 | /* |
| 3546 | * Steal an opening so that no other queued requests |
| 3547 | * can get it before us while we simulate interrupts. |
| 3548 | */ |
| 3549 | dev->ccbq.devq_openings--; |
| 3550 | dev->ccbq.dev_openings--; |
| 3551 | |
| 3552 | while(((devq && devq->send_openings <= 0) || dev->ccbq.dev_openings < 0) |
| 3553 | && (--timeout > 0)) { |
| 3554 | DELAY(1000); |
| 3555 | (*(sim->sim_poll))(sim); |
| 3556 | camisr_runqueue(sim); |
| 3557 | } |
| 3558 | |
| 3559 | dev->ccbq.devq_openings++; |
| 3560 | dev->ccbq.dev_openings++; |
| 3561 | |
| 3562 | if (timeout != 0) { |
| 3563 | xpt_action(start_ccb); |
| 3564 | while(--timeout > 0) { |
| 3565 | (*(sim->sim_poll))(sim); |
| 3566 | camisr_runqueue(sim); |
| 3567 | if ((start_ccb->ccb_h.status & CAM_STATUS_MASK) |
| 3568 | != CAM_REQ_INPROG) |
| 3569 | break; |
| 3570 | DELAY(1000); |
| 3571 | } |
| 3572 | if (timeout == 0) { |
| 3573 | /* |
| 3574 | * XXX Is it worth adding a sim_timeout entry |
| 3575 | * point so we can attempt recovery? If |
| 3576 | * this is only used for dumps, I don't think |
| 3577 | * it is. |
| 3578 | */ |
| 3579 | start_ccb->ccb_h.status = CAM_CMD_TIMEOUT; |
| 3580 | } |
| 3581 | } else { |
| 3582 | start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
| 3583 | } |
| 3584 | } |
| 3585 | |
| 3586 | /* |
| 3587 | * Schedule a peripheral driver to receive a ccb when it's |
| 3588 | * target device has space for more transactions. |
| 3589 | */ |
| 3590 | void |
| 3591 | xpt_schedule(struct cam_periph *perph, u_int32_t new_priority) |
| 3592 | { |
| 3593 | struct cam_ed *device; |
| 3594 | union ccb *work_ccb; |
| 3595 | int runq; |
| 3596 | |
| 3597 | sim_lock_assert_owned(perph->sim->lock); |
| 3598 | |
| 3599 | CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n")); |
| 3600 | device = perph->path->device; |
| 3601 | if (periph_is_queued(perph)) { |
| 3602 | /* Simply reorder based on new priority */ |
| 3603 | CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, |
| 3604 | (" change priority to %d\n", new_priority)); |
| 3605 | if (new_priority < perph->pinfo.priority) { |
| 3606 | camq_change_priority(&device->drvq, |
| 3607 | perph->pinfo.index, |
| 3608 | new_priority); |
| 3609 | } |
| 3610 | runq = 0; |
| 3611 | } else if (perph->path->bus->sim == &cam_dead_sim) { |
| 3612 | /* The SIM is gone so just call periph_start directly. */ |
| 3613 | work_ccb = xpt_get_ccb(perph->path->device); |
| 3614 | if (work_ccb == NULL) |
| 3615 | return; /* XXX */ |
| 3616 | xpt_setup_ccb(&work_ccb->ccb_h, perph->path, new_priority); |
| 3617 | perph->pinfo.priority = new_priority; |
| 3618 | perph->periph_start(perph, work_ccb); |
| 3619 | return; |
| 3620 | } else { |
| 3621 | /* New entry on the queue */ |
| 3622 | CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, |
| 3623 | (" added periph to queue\n")); |
| 3624 | perph->pinfo.priority = new_priority; |
| 3625 | perph->pinfo.generation = ++device->drvq.generation; |
| 3626 | camq_insert(&device->drvq, &perph->pinfo); |
| 3627 | runq = xpt_schedule_dev_allocq(perph->path->bus, device); |
| 3628 | } |
| 3629 | if (runq != 0) { |
| 3630 | CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE, |
| 3631 | (" calling xpt_run_devq\n")); |
| 3632 | xpt_run_dev_allocq(perph->path->bus); |
| 3633 | } |
| 3634 | } |
| 3635 | |
| 3636 | |
| 3637 | /* |
| 3638 | * Schedule a device to run on a given queue. |
| 3639 | * If the device was inserted as a new entry on the queue, |
| 3640 | * return 1 meaning the device queue should be run. If we |
| 3641 | * were already queued, implying someone else has already |
| 3642 | * started the queue, return 0 so the caller doesn't attempt |
| 3643 | * to run the queue. |
| 3644 | */ |
| 3645 | static int |
| 3646 | xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo, |
| 3647 | u_int32_t new_priority) |
| 3648 | { |
| 3649 | int retval; |
| 3650 | u_int32_t old_priority; |
| 3651 | |
| 3652 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n")); |
| 3653 | |
| 3654 | old_priority = pinfo->priority; |
| 3655 | |
| 3656 | /* |
| 3657 | * Are we already queued? |
| 3658 | */ |
| 3659 | if (pinfo->index != CAM_UNQUEUED_INDEX) { |
| 3660 | /* Simply reorder based on new priority */ |
| 3661 | if (new_priority < old_priority) { |
| 3662 | camq_change_priority(queue, pinfo->index, |
| 3663 | new_priority); |
| 3664 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, |
| 3665 | ("changed priority to %d\n", |
| 3666 | new_priority)); |
| 3667 | } |
| 3668 | retval = 0; |
| 3669 | } else { |
| 3670 | /* New entry on the queue */ |
| 3671 | if (new_priority < old_priority) |
| 3672 | pinfo->priority = new_priority; |
| 3673 | |
| 3674 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, |
| 3675 | ("Inserting onto queue\n")); |
| 3676 | pinfo->generation = ++queue->generation; |
| 3677 | camq_insert(queue, pinfo); |
| 3678 | retval = 1; |
| 3679 | } |
| 3680 | return (retval); |
| 3681 | } |
| 3682 | |
| 3683 | static void |
| 3684 | xpt_run_dev_allocq(struct cam_eb *bus) |
| 3685 | { |
| 3686 | struct cam_devq *devq; |
| 3687 | |
| 3688 | if ((devq = bus->sim->devq) == NULL) { |
| 3689 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq: NULL devq\n")); |
| 3690 | return; |
| 3691 | } |
| 3692 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n")); |
| 3693 | |
| 3694 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, |
| 3695 | (" qfrozen_cnt == 0x%x, entries == %d, " |
| 3696 | "openings == %d, active == %d\n", |
| 3697 | devq->alloc_queue.qfrozen_cnt, |
| 3698 | devq->alloc_queue.entries, |
| 3699 | devq->alloc_openings, |
| 3700 | devq->alloc_active)); |
| 3701 | |
| 3702 | devq->alloc_queue.qfrozen_cnt++; |
| 3703 | while ((devq->alloc_queue.entries > 0) |
| 3704 | && (devq->alloc_openings > 0) |
| 3705 | && (devq->alloc_queue.qfrozen_cnt <= 1)) { |
| 3706 | struct cam_ed_qinfo *qinfo; |
| 3707 | struct cam_ed *device; |
| 3708 | union ccb *work_ccb; |
| 3709 | struct cam_periph *drv; |
| 3710 | struct camq *drvq; |
| 3711 | |
| 3712 | qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, |
| 3713 | CAMQ_HEAD); |
| 3714 | device = qinfo->device; |
| 3715 | |
| 3716 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, |
| 3717 | ("running device %p\n", device)); |
| 3718 | |
| 3719 | drvq = &device->drvq; |
| 3720 | |
| 3721 | #ifdef CAMDEBUG |
| 3722 | if (drvq->entries <= 0) { |
| 3723 | panic("xpt_run_dev_allocq: " |
| 3724 | "Device on queue without any work to do"); |
| 3725 | } |
| 3726 | #endif |
| 3727 | if ((work_ccb = xpt_get_ccb(device)) != NULL) { |
| 3728 | devq->alloc_openings--; |
| 3729 | devq->alloc_active++; |
| 3730 | drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD); |
| 3731 | xpt_setup_ccb(&work_ccb->ccb_h, drv->path, |
| 3732 | drv->pinfo.priority); |
| 3733 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, |
| 3734 | ("calling periph start\n")); |
| 3735 | drv->periph_start(drv, work_ccb); |
| 3736 | } else { |
| 3737 | /* |
| 3738 | * Malloc failure in alloc_ccb |
| 3739 | */ |
| 3740 | /* |
| 3741 | * XXX add us to a list to be run from free_ccb |
| 3742 | * if we don't have any ccbs active on this |
| 3743 | * device queue otherwise we may never get run |
| 3744 | * again. |
| 3745 | */ |
| 3746 | break; |
| 3747 | } |
| 3748 | |
| 3749 | if (drvq->entries > 0) { |
| 3750 | /* We have more work. Attempt to reschedule */ |
| 3751 | xpt_schedule_dev_allocq(bus, device); |
| 3752 | } |
| 3753 | } |
| 3754 | devq->alloc_queue.qfrozen_cnt--; |
| 3755 | } |
| 3756 | |
| 3757 | static void |
| 3758 | xpt_run_dev_sendq(struct cam_eb *bus) |
| 3759 | { |
| 3760 | struct cam_devq *devq; |
| 3761 | |
| 3762 | if ((devq = bus->sim->devq) == NULL) { |
| 3763 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq: NULL devq\n")); |
| 3764 | return; |
| 3765 | } |
| 3766 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n")); |
| 3767 | |
| 3768 | devq->send_queue.qfrozen_cnt++; |
| 3769 | while ((devq->send_queue.entries > 0) |
| 3770 | && (devq->send_openings > 0)) { |
| 3771 | struct cam_ed_qinfo *qinfo; |
| 3772 | struct cam_ed *device; |
| 3773 | union ccb *work_ccb; |
| 3774 | struct cam_sim *sim; |
| 3775 | |
| 3776 | if (devq->send_queue.qfrozen_cnt > 1) { |
| 3777 | break; |
| 3778 | } |
| 3779 | |
| 3780 | qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, |
| 3781 | CAMQ_HEAD); |
| 3782 | device = qinfo->device; |
| 3783 | |
| 3784 | /* |
| 3785 | * If the device has been "frozen", don't attempt |
| 3786 | * to run it. |
| 3787 | */ |
| 3788 | if (device->qfrozen_cnt > 0) { |
| 3789 | continue; |
| 3790 | } |
| 3791 | |
| 3792 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, |
| 3793 | ("running device %p\n", device)); |
| 3794 | |
| 3795 | work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); |
| 3796 | if (work_ccb == NULL) { |
| 3797 | kprintf("device on run queue with no ccbs???\n"); |
| 3798 | continue; |
| 3799 | } |
| 3800 | |
| 3801 | if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) { |
| 3802 | |
| 3803 | lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); |
| 3804 | if (xsoftc.num_highpower <= 0) { |
| 3805 | /* |
| 3806 | * We got a high power command, but we |
| 3807 | * don't have any available slots. Freeze |
| 3808 | * the device queue until we have a slot |
| 3809 | * available. |
| 3810 | */ |
| 3811 | device->qfrozen_cnt++; |
| 3812 | STAILQ_INSERT_TAIL(&xsoftc.highpowerq, |
| 3813 | &work_ccb->ccb_h, |
| 3814 | xpt_links.stqe); |
| 3815 | |
| 3816 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 3817 | continue; |
| 3818 | } else { |
| 3819 | /* |
| 3820 | * Consume a high power slot while |
| 3821 | * this ccb runs. |
| 3822 | */ |
| 3823 | xsoftc.num_highpower--; |
| 3824 | } |
| 3825 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 3826 | } |
| 3827 | devq->active_dev = device; |
| 3828 | cam_ccbq_remove_ccb(&device->ccbq, work_ccb); |
| 3829 | |
| 3830 | cam_ccbq_send_ccb(&device->ccbq, work_ccb); |
| 3831 | |
| 3832 | devq->send_openings--; |
| 3833 | devq->send_active++; |
| 3834 | |
| 3835 | if (device->ccbq.queue.entries > 0) |
| 3836 | xpt_schedule_dev_sendq(bus, device); |
| 3837 | |
| 3838 | if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){ |
| 3839 | /* |
| 3840 | * The client wants to freeze the queue |
| 3841 | * after this CCB is sent. |
| 3842 | */ |
| 3843 | device->qfrozen_cnt++; |
| 3844 | } |
| 3845 | |
| 3846 | /* In Target mode, the peripheral driver knows best... */ |
| 3847 | if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) { |
| 3848 | if ((device->inq_flags & SID_CmdQue) != 0 |
| 3849 | && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE) |
| 3850 | work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID; |
| 3851 | else |
| 3852 | /* |
| 3853 | * Clear this in case of a retried CCB that |
| 3854 | * failed due to a rejected tag. |
| 3855 | */ |
| 3856 | work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID; |
| 3857 | } |
| 3858 | |
| 3859 | /* |
| 3860 | * Device queues can be shared among multiple sim instances |
| 3861 | * that reside on different busses. Use the SIM in the queue |
| 3862 | * CCB's path, rather than the one in the bus that was passed |
| 3863 | * into this function. |
| 3864 | */ |
| 3865 | sim = work_ccb->ccb_h.path->bus->sim; |
| 3866 | (*(sim->sim_action))(sim, work_ccb); |
| 3867 | |
| 3868 | devq->active_dev = NULL; |
| 3869 | } |
| 3870 | devq->send_queue.qfrozen_cnt--; |
| 3871 | } |
| 3872 | |
| 3873 | /* |
| 3874 | * This function merges stuff from the slave ccb into the master ccb, while |
| 3875 | * keeping important fields in the master ccb constant. |
| 3876 | */ |
| 3877 | void |
| 3878 | xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb) |
| 3879 | { |
| 3880 | /* |
| 3881 | * Pull fields that are valid for peripheral drivers to set |
| 3882 | * into the master CCB along with the CCB "payload". |
| 3883 | */ |
| 3884 | master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count; |
| 3885 | master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code; |
| 3886 | master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout; |
| 3887 | master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags; |
| 3888 | bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1], |
| 3889 | sizeof(union ccb) - sizeof(struct ccb_hdr)); |
| 3890 | } |
| 3891 | |
| 3892 | void |
| 3893 | xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority) |
| 3894 | { |
| 3895 | CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n")); |
| 3896 | callout_init(&ccb_h->timeout_ch); |
| 3897 | ccb_h->pinfo.priority = priority; |
| 3898 | ccb_h->path = path; |
| 3899 | ccb_h->path_id = path->bus->path_id; |
| 3900 | if (path->target) |
| 3901 | ccb_h->target_id = path->target->target_id; |
| 3902 | else |
| 3903 | ccb_h->target_id = CAM_TARGET_WILDCARD; |
| 3904 | if (path->device) { |
| 3905 | ccb_h->target_lun = path->device->lun_id; |
| 3906 | ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation; |
| 3907 | } else { |
| 3908 | ccb_h->target_lun = CAM_TARGET_WILDCARD; |
| 3909 | } |
| 3910 | ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; |
| 3911 | ccb_h->flags = 0; |
| 3912 | } |
| 3913 | |
| 3914 | /* Path manipulation functions */ |
| 3915 | cam_status |
| 3916 | xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph, |
| 3917 | path_id_t path_id, target_id_t target_id, lun_id_t lun_id) |
| 3918 | { |
| 3919 | struct cam_path *path; |
| 3920 | cam_status status; |
| 3921 | |
| 3922 | path = kmalloc(sizeof(*path), M_CAMXPT, M_INTWAIT); |
| 3923 | status = xpt_compile_path(path, perph, path_id, target_id, lun_id); |
| 3924 | if (status != CAM_REQ_CMP) { |
| 3925 | kfree(path, M_CAMXPT); |
| 3926 | path = NULL; |
| 3927 | } |
| 3928 | *new_path_ptr = path; |
| 3929 | return (status); |
| 3930 | } |
| 3931 | |
| 3932 | cam_status |
| 3933 | xpt_create_path_unlocked(struct cam_path **new_path_ptr, |
| 3934 | struct cam_periph *periph, path_id_t path_id, |
| 3935 | target_id_t target_id, lun_id_t lun_id) |
| 3936 | { |
| 3937 | struct cam_path *path; |
| 3938 | struct cam_eb *bus = NULL; |
| 3939 | cam_status status; |
| 3940 | int need_unlock = 0; |
| 3941 | |
| 3942 | path = (struct cam_path *)kmalloc(sizeof(*path), M_CAMXPT, M_WAITOK); |
| 3943 | |
| 3944 | if (path_id != CAM_BUS_WILDCARD) { |
| 3945 | bus = xpt_find_bus(path_id); |
| 3946 | if (bus != NULL) { |
| 3947 | need_unlock = 1; |
| 3948 | CAM_SIM_LOCK(bus->sim); |
| 3949 | } |
| 3950 | } |
| 3951 | status = xpt_compile_path(path, periph, path_id, target_id, lun_id); |
| 3952 | if (need_unlock) |
| 3953 | CAM_SIM_UNLOCK(bus->sim); |
| 3954 | if (status != CAM_REQ_CMP) { |
| 3955 | kfree(path, M_CAMXPT); |
| 3956 | path = NULL; |
| 3957 | } |
| 3958 | *new_path_ptr = path; |
| 3959 | return (status); |
| 3960 | } |
| 3961 | |
| 3962 | static cam_status |
| 3963 | xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph, |
| 3964 | path_id_t path_id, target_id_t target_id, lun_id_t lun_id) |
| 3965 | { |
| 3966 | struct cam_eb *bus; |
| 3967 | struct cam_et *target; |
| 3968 | struct cam_ed *device; |
| 3969 | cam_status status; |
| 3970 | |
| 3971 | status = CAM_REQ_CMP; /* Completed without error */ |
| 3972 | target = NULL; /* Wildcarded */ |
| 3973 | device = NULL; /* Wildcarded */ |
| 3974 | |
| 3975 | /* |
| 3976 | * We will potentially modify the EDT, so block interrupts |
| 3977 | * that may attempt to create cam paths. |
| 3978 | */ |
| 3979 | bus = xpt_find_bus(path_id); |
| 3980 | if (bus == NULL) { |
| 3981 | status = CAM_PATH_INVALID; |
| 3982 | } else { |
| 3983 | target = xpt_find_target(bus, target_id); |
| 3984 | if (target == NULL) { |
| 3985 | /* Create one */ |
| 3986 | struct cam_et *new_target; |
| 3987 | |
| 3988 | new_target = xpt_alloc_target(bus, target_id); |
| 3989 | if (new_target == NULL) { |
| 3990 | status = CAM_RESRC_UNAVAIL; |
| 3991 | } else { |
| 3992 | target = new_target; |
| 3993 | } |
| 3994 | } |
| 3995 | if (target != NULL) { |
| 3996 | device = xpt_find_device(target, lun_id); |
| 3997 | if (device == NULL) { |
| 3998 | /* Create one */ |
| 3999 | struct cam_ed *new_device; |
| 4000 | |
| 4001 | new_device = xpt_alloc_device(bus, |
| 4002 | target, |
| 4003 | lun_id); |
| 4004 | if (new_device == NULL) { |
| 4005 | status = CAM_RESRC_UNAVAIL; |
| 4006 | } else { |
| 4007 | device = new_device; |
| 4008 | } |
| 4009 | } |
| 4010 | } |
| 4011 | } |
| 4012 | |
| 4013 | /* |
| 4014 | * Only touch the user's data if we are successful. |
| 4015 | */ |
| 4016 | if (status == CAM_REQ_CMP) { |
| 4017 | new_path->periph = perph; |
| 4018 | new_path->bus = bus; |
| 4019 | new_path->target = target; |
| 4020 | new_path->device = device; |
| 4021 | CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n")); |
| 4022 | } else { |
| 4023 | if (device != NULL) |
| 4024 | xpt_release_device(bus, target, device); |
| 4025 | if (target != NULL) |
| 4026 | xpt_release_target(bus, target); |
| 4027 | if (bus != NULL) |
| 4028 | xpt_release_bus(bus); |
| 4029 | } |
| 4030 | return (status); |
| 4031 | } |
| 4032 | |
| 4033 | static void |
| 4034 | xpt_release_path(struct cam_path *path) |
| 4035 | { |
| 4036 | CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n")); |
| 4037 | if (path->device != NULL) { |
| 4038 | xpt_release_device(path->bus, path->target, path->device); |
| 4039 | path->device = NULL; |
| 4040 | } |
| 4041 | if (path->target != NULL) { |
| 4042 | xpt_release_target(path->bus, path->target); |
| 4043 | path->target = NULL; |
| 4044 | } |
| 4045 | if (path->bus != NULL) { |
| 4046 | xpt_release_bus(path->bus); |
| 4047 | path->bus = NULL; |
| 4048 | } |
| 4049 | } |
| 4050 | |
| 4051 | void |
| 4052 | xpt_free_path(struct cam_path *path) |
| 4053 | { |
| 4054 | CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n")); |
| 4055 | xpt_release_path(path); |
| 4056 | kfree(path, M_CAMXPT); |
| 4057 | } |
| 4058 | |
| 4059 | |
| 4060 | /* |
| 4061 | * Return -1 for failure, 0 for exact match, 1 for match with wildcards |
| 4062 | * in path1, 2 for match with wildcards in path2. |
| 4063 | */ |
| 4064 | int |
| 4065 | xpt_path_comp(struct cam_path *path1, struct cam_path *path2) |
| 4066 | { |
| 4067 | int retval = 0; |
| 4068 | |
| 4069 | if (path1->bus != path2->bus) { |
| 4070 | if (path1->bus->path_id == CAM_BUS_WILDCARD) |
| 4071 | retval = 1; |
| 4072 | else if (path2->bus->path_id == CAM_BUS_WILDCARD) |
| 4073 | retval = 2; |
| 4074 | else |
| 4075 | return (-1); |
| 4076 | } |
| 4077 | if (path1->target != path2->target) { |
| 4078 | if (path1->target->target_id == CAM_TARGET_WILDCARD) { |
| 4079 | if (retval == 0) |
| 4080 | retval = 1; |
| 4081 | } else if (path2->target->target_id == CAM_TARGET_WILDCARD) |
| 4082 | retval = 2; |
| 4083 | else |
| 4084 | return (-1); |
| 4085 | } |
| 4086 | if (path1->device != path2->device) { |
| 4087 | if (path1->device->lun_id == CAM_LUN_WILDCARD) { |
| 4088 | if (retval == 0) |
| 4089 | retval = 1; |
| 4090 | } else if (path2->device->lun_id == CAM_LUN_WILDCARD) |
| 4091 | retval = 2; |
| 4092 | else |
| 4093 | return (-1); |
| 4094 | } |
| 4095 | return (retval); |
| 4096 | } |
| 4097 | |
| 4098 | void |
| 4099 | xpt_print_path(struct cam_path *path) |
| 4100 | { |
| 4101 | |
| 4102 | if (path == NULL) |
| 4103 | kprintf("(nopath): "); |
| 4104 | else { |
| 4105 | if (path->periph != NULL) |
| 4106 | kprintf("(%s%d:", path->periph->periph_name, |
| 4107 | path->periph->unit_number); |
| 4108 | else |
| 4109 | kprintf("(noperiph:"); |
| 4110 | |
| 4111 | if (path->bus != NULL) |
| 4112 | kprintf("%s%d:%d:", path->bus->sim->sim_name, |
| 4113 | path->bus->sim->unit_number, |
| 4114 | path->bus->sim->bus_id); |
| 4115 | else |
| 4116 | kprintf("nobus:"); |
| 4117 | |
| 4118 | if (path->target != NULL) |
| 4119 | kprintf("%d:", path->target->target_id); |
| 4120 | else |
| 4121 | kprintf("X:"); |
| 4122 | |
| 4123 | if (path->device != NULL) |
| 4124 | kprintf("%d): ", path->device->lun_id); |
| 4125 | else |
| 4126 | kprintf("X): "); |
| 4127 | } |
| 4128 | } |
| 4129 | |
| 4130 | void |
| 4131 | xpt_print(struct cam_path *path, const char *fmt, ...) |
| 4132 | { |
| 4133 | __va_list ap; |
| 4134 | xpt_print_path(path); |
| 4135 | __va_start(ap, fmt); |
| 4136 | kvprintf(fmt, ap); |
| 4137 | __va_end(ap); |
| 4138 | } |
| 4139 | |
| 4140 | int |
| 4141 | xpt_path_string(struct cam_path *path, char *str, size_t str_len) |
| 4142 | { |
| 4143 | struct sbuf sb; |
| 4144 | |
| 4145 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4146 | |
| 4147 | sbuf_new(&sb, str, str_len, 0); |
| 4148 | |
| 4149 | if (path == NULL) |
| 4150 | sbuf_printf(&sb, "(nopath): "); |
| 4151 | else { |
| 4152 | if (path->periph != NULL) |
| 4153 | sbuf_printf(&sb, "(%s%d:", path->periph->periph_name, |
| 4154 | path->periph->unit_number); |
| 4155 | else |
| 4156 | sbuf_printf(&sb, "(noperiph:"); |
| 4157 | |
| 4158 | if (path->bus != NULL) |
| 4159 | sbuf_printf(&sb, "%s%d:%d:", path->bus->sim->sim_name, |
| 4160 | path->bus->sim->unit_number, |
| 4161 | path->bus->sim->bus_id); |
| 4162 | else |
| 4163 | sbuf_printf(&sb, "nobus:"); |
| 4164 | |
| 4165 | if (path->target != NULL) |
| 4166 | sbuf_printf(&sb, "%d:", path->target->target_id); |
| 4167 | else |
| 4168 | sbuf_printf(&sb, "X:"); |
| 4169 | |
| 4170 | if (path->device != NULL) |
| 4171 | sbuf_printf(&sb, "%d): ", path->device->lun_id); |
| 4172 | else |
| 4173 | sbuf_printf(&sb, "X): "); |
| 4174 | } |
| 4175 | sbuf_finish(&sb); |
| 4176 | |
| 4177 | return(sbuf_len(&sb)); |
| 4178 | } |
| 4179 | |
| 4180 | path_id_t |
| 4181 | xpt_path_path_id(struct cam_path *path) |
| 4182 | { |
| 4183 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4184 | |
| 4185 | return(path->bus->path_id); |
| 4186 | } |
| 4187 | |
| 4188 | target_id_t |
| 4189 | xpt_path_target_id(struct cam_path *path) |
| 4190 | { |
| 4191 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4192 | |
| 4193 | if (path->target != NULL) |
| 4194 | return (path->target->target_id); |
| 4195 | else |
| 4196 | return (CAM_TARGET_WILDCARD); |
| 4197 | } |
| 4198 | |
| 4199 | lun_id_t |
| 4200 | xpt_path_lun_id(struct cam_path *path) |
| 4201 | { |
| 4202 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4203 | |
| 4204 | if (path->device != NULL) |
| 4205 | return (path->device->lun_id); |
| 4206 | else |
| 4207 | return (CAM_LUN_WILDCARD); |
| 4208 | } |
| 4209 | |
| 4210 | struct cam_sim * |
| 4211 | xpt_path_sim(struct cam_path *path) |
| 4212 | { |
| 4213 | return (path->bus->sim); |
| 4214 | } |
| 4215 | |
| 4216 | struct cam_periph* |
| 4217 | xpt_path_periph(struct cam_path *path) |
| 4218 | { |
| 4219 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4220 | |
| 4221 | return (path->periph); |
| 4222 | } |
| 4223 | |
| 4224 | char * |
| 4225 | xpt_path_serialno(struct cam_path *path) |
| 4226 | { |
| 4227 | return (path->device->serial_num); |
| 4228 | } |
| 4229 | |
| 4230 | /* |
| 4231 | * Release a CAM control block for the caller. Remit the cost of the structure |
| 4232 | * to the device referenced by the path. If the this device had no 'credits' |
| 4233 | * and peripheral drivers have registered async callbacks for this notification |
| 4234 | * call them now. |
| 4235 | */ |
| 4236 | void |
| 4237 | xpt_release_ccb(union ccb *free_ccb) |
| 4238 | { |
| 4239 | struct cam_path *path; |
| 4240 | struct cam_ed *device; |
| 4241 | struct cam_eb *bus; |
| 4242 | struct cam_sim *sim; |
| 4243 | |
| 4244 | CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n")); |
| 4245 | path = free_ccb->ccb_h.path; |
| 4246 | device = path->device; |
| 4247 | bus = path->bus; |
| 4248 | sim = bus->sim; |
| 4249 | |
| 4250 | sim_lock_assert_owned(sim->lock); |
| 4251 | |
| 4252 | cam_ccbq_release_opening(&device->ccbq); |
| 4253 | if (sim->ccb_count > sim->max_ccbs) { |
| 4254 | xpt_free_ccb(free_ccb); |
| 4255 | sim->ccb_count--; |
| 4256 | } else if (sim == &cam_dead_sim) { |
| 4257 | xpt_free_ccb(free_ccb); |
| 4258 | } else { |
| 4259 | SLIST_INSERT_HEAD(&sim->ccb_freeq, &free_ccb->ccb_h, |
| 4260 | xpt_links.sle); |
| 4261 | } |
| 4262 | if (sim->devq == NULL) { |
| 4263 | return; |
| 4264 | } |
| 4265 | sim->devq->alloc_openings++; |
| 4266 | sim->devq->alloc_active--; |
| 4267 | /* XXX Turn this into an inline function - xpt_run_device?? */ |
| 4268 | if ((device_is_alloc_queued(device) == 0) |
| 4269 | && (device->drvq.entries > 0)) { |
| 4270 | xpt_schedule_dev_allocq(bus, device); |
| 4271 | } |
| 4272 | if (dev_allocq_is_runnable(sim->devq)) |
| 4273 | xpt_run_dev_allocq(bus); |
| 4274 | } |
| 4275 | |
| 4276 | /* Functions accessed by SIM drivers */ |
| 4277 | |
| 4278 | /* |
| 4279 | * A sim structure, listing the SIM entry points and instance |
| 4280 | * identification info is passed to xpt_bus_register to hook the SIM |
| 4281 | * into the CAM framework. xpt_bus_register creates a cam_eb entry |
| 4282 | * for this new bus and places it in the array of busses and assigns |
| 4283 | * it a path_id. The path_id may be influenced by "hard wiring" |
| 4284 | * information specified by the user. Once interrupt services are |
| 4285 | * availible, the bus will be probed. |
| 4286 | */ |
| 4287 | int32_t |
| 4288 | xpt_bus_register(struct cam_sim *sim, u_int32_t bus) |
| 4289 | { |
| 4290 | struct cam_eb *new_bus; |
| 4291 | struct cam_eb *old_bus; |
| 4292 | struct ccb_pathinq cpi; |
| 4293 | |
| 4294 | sim_lock_assert_owned(sim->lock); |
| 4295 | |
| 4296 | sim->bus_id = bus; |
| 4297 | new_bus = kmalloc(sizeof(*new_bus), M_CAMXPT, M_INTWAIT); |
| 4298 | |
| 4299 | if (strcmp(sim->sim_name, "xpt") != 0) { |
| 4300 | sim->path_id = |
| 4301 | xptpathid(sim->sim_name, sim->unit_number, sim->bus_id); |
| 4302 | } |
| 4303 | |
| 4304 | TAILQ_INIT(&new_bus->et_entries); |
| 4305 | new_bus->path_id = sim->path_id; |
| 4306 | new_bus->sim = sim; |
| 4307 | ++sim->refcount; |
| 4308 | timevalclear(&new_bus->last_reset); |
| 4309 | new_bus->flags = 0; |
| 4310 | new_bus->refcount = 1; /* Held until a bus_deregister event */ |
| 4311 | new_bus->generation = 0; |
| 4312 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 4313 | old_bus = TAILQ_FIRST(&xsoftc.xpt_busses); |
| 4314 | while (old_bus != NULL |
| 4315 | && old_bus->path_id < new_bus->path_id) |
| 4316 | old_bus = TAILQ_NEXT(old_bus, links); |
| 4317 | if (old_bus != NULL) |
| 4318 | TAILQ_INSERT_BEFORE(old_bus, new_bus, links); |
| 4319 | else |
| 4320 | TAILQ_INSERT_TAIL(&xsoftc.xpt_busses, new_bus, links); |
| 4321 | xsoftc.bus_generation++; |
| 4322 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 4323 | |
| 4324 | /* Notify interested parties */ |
| 4325 | if (sim->path_id != CAM_XPT_PATH_ID) { |
| 4326 | struct cam_path path; |
| 4327 | |
| 4328 | xpt_compile_path(&path, /*periph*/NULL, sim->path_id, |
| 4329 | CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); |
| 4330 | xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); |
| 4331 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 4332 | xpt_action((union ccb *)&cpi); |
| 4333 | xpt_async(AC_PATH_REGISTERED, &path, &cpi); |
| 4334 | xpt_release_path(&path); |
| 4335 | } |
| 4336 | return (CAM_SUCCESS); |
| 4337 | } |
| 4338 | |
| 4339 | /* |
| 4340 | * Deregister a bus. We must clean out all transactions pending on the bus. |
| 4341 | * This routine is typically called prior to cam_sim_free() (e.g. see |
| 4342 | * dev/usbmisc/umass/umass.c) |
| 4343 | */ |
| 4344 | int32_t |
| 4345 | xpt_bus_deregister(path_id_t pathid) |
| 4346 | { |
| 4347 | struct cam_path bus_path; |
| 4348 | struct cam_et *target; |
| 4349 | struct cam_ed *device; |
| 4350 | struct cam_ed_qinfo *qinfo; |
| 4351 | struct cam_devq *devq; |
| 4352 | struct cam_periph *periph; |
| 4353 | struct cam_sim *ccbsim; |
| 4354 | union ccb *work_ccb; |
| 4355 | cam_status status; |
| 4356 | int retries = 0; |
| 4357 | |
| 4358 | status = xpt_compile_path(&bus_path, NULL, pathid, |
| 4359 | CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); |
| 4360 | if (status != CAM_REQ_CMP) |
| 4361 | return (status); |
| 4362 | |
| 4363 | /* |
| 4364 | * This should clear out all pending requests and timeouts, but |
| 4365 | * the ccb's may be queued to a software interrupt. |
| 4366 | * |
| 4367 | * XXX AC_LOST_DEVICE does not precisely abort the pending requests, |
| 4368 | * and it really ought to. |
| 4369 | */ |
| 4370 | xpt_async(AC_LOST_DEVICE, &bus_path, NULL); |
| 4371 | xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); |
| 4372 | |
| 4373 | /* |
| 4374 | * Mark the SIM as having been deregistered. This prevents |
| 4375 | * certain operations from re-queueing to it, stops new devices |
| 4376 | * from being added, etc. |
| 4377 | */ |
| 4378 | devq = bus_path.bus->sim->devq; |
| 4379 | ccbsim = bus_path.bus->sim; |
| 4380 | ccbsim->flags |= CAM_SIM_DEREGISTERED; |
| 4381 | |
| 4382 | again: |
| 4383 | /* |
| 4384 | * Execute any pending operations now. |
| 4385 | */ |
| 4386 | while ((qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue, |
| 4387 | CAMQ_HEAD)) != NULL || |
| 4388 | (qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue, |
| 4389 | CAMQ_HEAD)) != NULL) { |
| 4390 | do { |
| 4391 | device = qinfo->device; |
| 4392 | work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD); |
| 4393 | if (work_ccb != NULL) { |
| 4394 | devq->active_dev = device; |
| 4395 | cam_ccbq_remove_ccb(&device->ccbq, work_ccb); |
| 4396 | cam_ccbq_send_ccb(&device->ccbq, work_ccb); |
| 4397 | (*(ccbsim->sim_action))(ccbsim, work_ccb); |
| 4398 | } |
| 4399 | |
| 4400 | periph = (struct cam_periph *)camq_remove(&device->drvq, |
| 4401 | CAMQ_HEAD); |
| 4402 | if (periph != NULL) |
| 4403 | xpt_schedule(periph, periph->pinfo.priority); |
| 4404 | } while (work_ccb != NULL || periph != NULL); |
| 4405 | } |
| 4406 | |
| 4407 | /* |
| 4408 | * Make sure all completed CCBs are processed. |
| 4409 | */ |
| 4410 | while (!TAILQ_EMPTY(&ccbsim->sim_doneq)) { |
| 4411 | camisr_runqueue(ccbsim); |
| 4412 | } |
| 4413 | |
| 4414 | /* |
| 4415 | * Check for requeues, reissues asyncs if necessary |
| 4416 | */ |
| 4417 | if (CAMQ_GET_HEAD(&devq->send_queue)) |
| 4418 | kprintf("camq: devq send_queue still in use (%d entries)\n", |
| 4419 | devq->send_queue.entries); |
| 4420 | if (CAMQ_GET_HEAD(&devq->alloc_queue)) |
| 4421 | kprintf("camq: devq alloc_queue still in use (%d entries)\n", |
| 4422 | devq->alloc_queue.entries); |
| 4423 | if (CAMQ_GET_HEAD(&devq->send_queue) || |
| 4424 | CAMQ_GET_HEAD(&devq->alloc_queue)) { |
| 4425 | if (++retries < 5) { |
| 4426 | xpt_async(AC_LOST_DEVICE, &bus_path, NULL); |
| 4427 | xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); |
| 4428 | goto again; |
| 4429 | } |
| 4430 | } |
| 4431 | |
| 4432 | /* |
| 4433 | * Retarget the bus and all cached sim pointers to dead_sim. |
| 4434 | * |
| 4435 | * Various CAM subsystems may be holding on to targets, devices, |
| 4436 | * and/or peripherals and may attempt to use the sim pointer cached |
| 4437 | * in some of these structures during close. |
| 4438 | */ |
| 4439 | bus_path.bus->sim = &cam_dead_sim; |
| 4440 | TAILQ_FOREACH(target, &bus_path.bus->et_entries, links) { |
| 4441 | TAILQ_FOREACH(device, &target->ed_entries, links) { |
| 4442 | device->sim = &cam_dead_sim; |
| 4443 | SLIST_FOREACH(periph, &device->periphs, periph_links) { |
| 4444 | periph->sim = &cam_dead_sim; |
| 4445 | } |
| 4446 | } |
| 4447 | } |
| 4448 | |
| 4449 | /* |
| 4450 | * Repeat the async's for the benefit of any new devices, such as |
| 4451 | * might be created from completed probes. Any new device |
| 4452 | * ops will run on dead_sim. |
| 4453 | * |
| 4454 | * XXX There are probably races :-( |
| 4455 | */ |
| 4456 | CAM_SIM_LOCK(&cam_dead_sim); |
| 4457 | xpt_async(AC_LOST_DEVICE, &bus_path, NULL); |
| 4458 | xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL); |
| 4459 | CAM_SIM_UNLOCK(&cam_dead_sim); |
| 4460 | |
| 4461 | /* Release the reference count held while registered. */ |
| 4462 | xpt_release_bus(bus_path.bus); |
| 4463 | xpt_release_path(&bus_path); |
| 4464 | |
| 4465 | /* Release the ref we got when the bus was registered */ |
| 4466 | cam_sim_release(ccbsim, 0); |
| 4467 | |
| 4468 | return (CAM_REQ_CMP); |
| 4469 | } |
| 4470 | |
| 4471 | static path_id_t |
| 4472 | xptnextfreepathid(void) |
| 4473 | { |
| 4474 | struct cam_eb *bus; |
| 4475 | path_id_t pathid; |
| 4476 | char *strval; |
| 4477 | |
| 4478 | pathid = 0; |
| 4479 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 4480 | bus = TAILQ_FIRST(&xsoftc.xpt_busses); |
| 4481 | retry: |
| 4482 | /* Find an unoccupied pathid */ |
| 4483 | while (bus != NULL && bus->path_id <= pathid) { |
| 4484 | if (bus->path_id == pathid) |
| 4485 | pathid++; |
| 4486 | bus = TAILQ_NEXT(bus, links); |
| 4487 | } |
| 4488 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 4489 | |
| 4490 | /* |
| 4491 | * Ensure that this pathid is not reserved for |
| 4492 | * a bus that may be registered in the future. |
| 4493 | */ |
| 4494 | if (resource_string_value("scbus", pathid, "at", &strval) == 0) { |
| 4495 | ++pathid; |
| 4496 | /* Start the search over */ |
| 4497 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 4498 | goto retry; |
| 4499 | } |
| 4500 | return (pathid); |
| 4501 | } |
| 4502 | |
| 4503 | static path_id_t |
| 4504 | xptpathid(const char *sim_name, int sim_unit, int sim_bus) |
| 4505 | { |
| 4506 | path_id_t pathid; |
| 4507 | int i, dunit, val; |
| 4508 | char buf[32]; |
| 4509 | |
| 4510 | pathid = CAM_XPT_PATH_ID; |
| 4511 | ksnprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit); |
| 4512 | i = -1; |
| 4513 | while ((i = resource_query_string(i, "at", buf)) != -1) { |
| 4514 | if (strcmp(resource_query_name(i), "scbus")) { |
| 4515 | /* Avoid a bit of foot shooting. */ |
| 4516 | continue; |
| 4517 | } |
| 4518 | dunit = resource_query_unit(i); |
| 4519 | if (dunit < 0) /* unwired?! */ |
| 4520 | continue; |
| 4521 | if (resource_int_value("scbus", dunit, "bus", &val) == 0) { |
| 4522 | if (sim_bus == val) { |
| 4523 | pathid = dunit; |
| 4524 | break; |
| 4525 | } |
| 4526 | } else if (sim_bus == 0) { |
| 4527 | /* Unspecified matches bus 0 */ |
| 4528 | pathid = dunit; |
| 4529 | break; |
| 4530 | } else { |
| 4531 | kprintf("Ambiguous scbus configuration for %s%d " |
| 4532 | "bus %d, cannot wire down. The kernel " |
| 4533 | "config entry for scbus%d should " |
| 4534 | "specify a controller bus.\n" |
| 4535 | "Scbus will be assigned dynamically.\n", |
| 4536 | sim_name, sim_unit, sim_bus, dunit); |
| 4537 | break; |
| 4538 | } |
| 4539 | } |
| 4540 | |
| 4541 | if (pathid == CAM_XPT_PATH_ID) |
| 4542 | pathid = xptnextfreepathid(); |
| 4543 | return (pathid); |
| 4544 | } |
| 4545 | |
| 4546 | void |
| 4547 | xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg) |
| 4548 | { |
| 4549 | struct cam_eb *bus; |
| 4550 | struct cam_et *target, *next_target; |
| 4551 | struct cam_ed *device, *next_device; |
| 4552 | |
| 4553 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4554 | |
| 4555 | CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n")); |
| 4556 | |
| 4557 | /* |
| 4558 | * Most async events come from a CAM interrupt context. In |
| 4559 | * a few cases, the error recovery code at the peripheral layer, |
| 4560 | * which may run from our SWI or a process context, may signal |
| 4561 | * deferred events with a call to xpt_async. |
| 4562 | */ |
| 4563 | |
| 4564 | bus = path->bus; |
| 4565 | |
| 4566 | if (async_code == AC_BUS_RESET) { |
| 4567 | /* Update our notion of when the last reset occurred */ |
| 4568 | microuptime(&bus->last_reset); |
| 4569 | } |
| 4570 | |
| 4571 | for (target = TAILQ_FIRST(&bus->et_entries); |
| 4572 | target != NULL; |
| 4573 | target = next_target) { |
| 4574 | |
| 4575 | next_target = TAILQ_NEXT(target, links); |
| 4576 | |
| 4577 | if (path->target != target |
| 4578 | && path->target->target_id != CAM_TARGET_WILDCARD |
| 4579 | && target->target_id != CAM_TARGET_WILDCARD) |
| 4580 | continue; |
| 4581 | |
| 4582 | if (async_code == AC_SENT_BDR) { |
| 4583 | /* Update our notion of when the last reset occurred */ |
| 4584 | microuptime(&path->target->last_reset); |
| 4585 | } |
| 4586 | |
| 4587 | for (device = TAILQ_FIRST(&target->ed_entries); |
| 4588 | device != NULL; |
| 4589 | device = next_device) { |
| 4590 | |
| 4591 | next_device = TAILQ_NEXT(device, links); |
| 4592 | |
| 4593 | if (path->device != device |
| 4594 | && path->device->lun_id != CAM_LUN_WILDCARD |
| 4595 | && device->lun_id != CAM_LUN_WILDCARD) |
| 4596 | continue; |
| 4597 | |
| 4598 | xpt_dev_async(async_code, bus, target, |
| 4599 | device, async_arg); |
| 4600 | |
| 4601 | xpt_async_bcast(&device->asyncs, async_code, |
| 4602 | path, async_arg); |
| 4603 | } |
| 4604 | } |
| 4605 | |
| 4606 | /* |
| 4607 | * If this wasn't a fully wildcarded async, tell all |
| 4608 | * clients that want all async events. |
| 4609 | */ |
| 4610 | if (bus != xpt_periph->path->bus) |
| 4611 | xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code, |
| 4612 | path, async_arg); |
| 4613 | } |
| 4614 | |
| 4615 | static void |
| 4616 | xpt_async_bcast(struct async_list *async_head, |
| 4617 | u_int32_t async_code, |
| 4618 | struct cam_path *path, void *async_arg) |
| 4619 | { |
| 4620 | struct async_node *cur_entry; |
| 4621 | |
| 4622 | cur_entry = SLIST_FIRST(async_head); |
| 4623 | while (cur_entry != NULL) { |
| 4624 | struct async_node *next_entry; |
| 4625 | /* |
| 4626 | * Grab the next list entry before we call the current |
| 4627 | * entry's callback. This is because the callback function |
| 4628 | * can delete its async callback entry. |
| 4629 | */ |
| 4630 | next_entry = SLIST_NEXT(cur_entry, links); |
| 4631 | if ((cur_entry->event_enable & async_code) != 0) |
| 4632 | cur_entry->callback(cur_entry->callback_arg, |
| 4633 | async_code, path, |
| 4634 | async_arg); |
| 4635 | cur_entry = next_entry; |
| 4636 | } |
| 4637 | } |
| 4638 | |
| 4639 | /* |
| 4640 | * Handle any per-device event notifications that require action by the XPT. |
| 4641 | */ |
| 4642 | static void |
| 4643 | xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target, |
| 4644 | struct cam_ed *device, void *async_arg) |
| 4645 | { |
| 4646 | cam_status status; |
| 4647 | struct cam_path newpath; |
| 4648 | |
| 4649 | /* |
| 4650 | * We only need to handle events for real devices. |
| 4651 | */ |
| 4652 | if (target->target_id == CAM_TARGET_WILDCARD |
| 4653 | || device->lun_id == CAM_LUN_WILDCARD) |
| 4654 | return; |
| 4655 | |
| 4656 | /* |
| 4657 | * We need our own path with wildcards expanded to |
| 4658 | * handle certain types of events. |
| 4659 | */ |
| 4660 | if ((async_code == AC_SENT_BDR) |
| 4661 | || (async_code == AC_BUS_RESET) |
| 4662 | || (async_code == AC_INQ_CHANGED)) |
| 4663 | status = xpt_compile_path(&newpath, NULL, |
| 4664 | bus->path_id, |
| 4665 | target->target_id, |
| 4666 | device->lun_id); |
| 4667 | else |
| 4668 | status = CAM_REQ_CMP_ERR; |
| 4669 | |
| 4670 | if (status == CAM_REQ_CMP) { |
| 4671 | |
| 4672 | /* |
| 4673 | * Allow transfer negotiation to occur in a |
| 4674 | * tag free environment. |
| 4675 | */ |
| 4676 | if (async_code == AC_SENT_BDR |
| 4677 | || async_code == AC_BUS_RESET) |
| 4678 | xpt_toggle_tags(&newpath); |
| 4679 | |
| 4680 | if (async_code == AC_INQ_CHANGED) { |
| 4681 | /* |
| 4682 | * We've sent a start unit command, or |
| 4683 | * something similar to a device that |
| 4684 | * may have caused its inquiry data to |
| 4685 | * change. So we re-scan the device to |
| 4686 | * refresh the inquiry data for it. |
| 4687 | */ |
| 4688 | xpt_scan_lun(newpath.periph, &newpath, |
| 4689 | CAM_EXPECT_INQ_CHANGE, NULL); |
| 4690 | } |
| 4691 | xpt_release_path(&newpath); |
| 4692 | } else if (async_code == AC_LOST_DEVICE) { |
| 4693 | /* |
| 4694 | * When we lose a device the device may be about to detach |
| 4695 | * the sim, we have to clear out all pending timeouts and |
| 4696 | * requests before that happens. XXX it would be nice if |
| 4697 | * we could abort the requests pertaining to the device. |
| 4698 | */ |
| 4699 | xpt_release_devq_timeout(device); |
| 4700 | if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) { |
| 4701 | device->flags |= CAM_DEV_UNCONFIGURED; |
| 4702 | xpt_release_device(bus, target, device); |
| 4703 | } |
| 4704 | } else if (async_code == AC_TRANSFER_NEG) { |
| 4705 | struct ccb_trans_settings *settings; |
| 4706 | |
| 4707 | settings = (struct ccb_trans_settings *)async_arg; |
| 4708 | xpt_set_transfer_settings(settings, device, |
| 4709 | /*async_update*/TRUE); |
| 4710 | } |
| 4711 | } |
| 4712 | |
| 4713 | u_int32_t |
| 4714 | xpt_freeze_devq(struct cam_path *path, u_int count) |
| 4715 | { |
| 4716 | struct ccb_hdr *ccbh; |
| 4717 | |
| 4718 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4719 | |
| 4720 | path->device->qfrozen_cnt += count; |
| 4721 | |
| 4722 | /* |
| 4723 | * Mark the last CCB in the queue as needing |
| 4724 | * to be requeued if the driver hasn't |
| 4725 | * changed it's state yet. This fixes a race |
| 4726 | * where a ccb is just about to be queued to |
| 4727 | * a controller driver when it's interrupt routine |
| 4728 | * freezes the queue. To completly close the |
| 4729 | * hole, controller drives must check to see |
| 4730 | * if a ccb's status is still CAM_REQ_INPROG |
| 4731 | * just before they queue |
| 4732 | * the CCB. See ahc_action/ahc_freeze_devq for |
| 4733 | * an example. |
| 4734 | */ |
| 4735 | ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq); |
| 4736 | if (ccbh && ccbh->status == CAM_REQ_INPROG) |
| 4737 | ccbh->status = CAM_REQUEUE_REQ; |
| 4738 | return (path->device->qfrozen_cnt); |
| 4739 | } |
| 4740 | |
| 4741 | u_int32_t |
| 4742 | xpt_freeze_simq(struct cam_sim *sim, u_int count) |
| 4743 | { |
| 4744 | sim_lock_assert_owned(sim->lock); |
| 4745 | |
| 4746 | if (sim->devq == NULL) |
| 4747 | return(count); |
| 4748 | sim->devq->send_queue.qfrozen_cnt += count; |
| 4749 | if (sim->devq->active_dev != NULL) { |
| 4750 | struct ccb_hdr *ccbh; |
| 4751 | |
| 4752 | ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs, |
| 4753 | ccb_hdr_tailq); |
| 4754 | if (ccbh && ccbh->status == CAM_REQ_INPROG) |
| 4755 | ccbh->status = CAM_REQUEUE_REQ; |
| 4756 | } |
| 4757 | return (sim->devq->send_queue.qfrozen_cnt); |
| 4758 | } |
| 4759 | |
| 4760 | /* |
| 4761 | * WARNING: most devices, especially USB/UMASS, may detach their sim early. |
| 4762 | * We ref-count the sim (and the bus only NULLs it out when the bus has been |
| 4763 | * freed, which is not the case here), but the device queue is also freed XXX |
| 4764 | * and we have to check that here. |
| 4765 | * |
| 4766 | * XXX fixme: could we simply not null-out the device queue via |
| 4767 | * cam_sim_free()? |
| 4768 | */ |
| 4769 | static void |
| 4770 | xpt_release_devq_timeout(void *arg) |
| 4771 | { |
| 4772 | struct cam_ed *device; |
| 4773 | |
| 4774 | device = (struct cam_ed *)arg; |
| 4775 | |
| 4776 | xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE); |
| 4777 | } |
| 4778 | |
| 4779 | void |
| 4780 | xpt_release_devq(struct cam_path *path, u_int count, int run_queue) |
| 4781 | { |
| 4782 | sim_lock_assert_owned(path->bus->sim->lock); |
| 4783 | |
| 4784 | xpt_release_devq_device(path->device, count, run_queue); |
| 4785 | } |
| 4786 | |
| 4787 | static void |
| 4788 | xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue) |
| 4789 | { |
| 4790 | int rundevq; |
| 4791 | |
| 4792 | rundevq = 0; |
| 4793 | |
| 4794 | if (dev->qfrozen_cnt > 0) { |
| 4795 | |
| 4796 | count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count; |
| 4797 | dev->qfrozen_cnt -= count; |
| 4798 | if (dev->qfrozen_cnt == 0) { |
| 4799 | |
| 4800 | /* |
| 4801 | * No longer need to wait for a successful |
| 4802 | * command completion. |
| 4803 | */ |
| 4804 | dev->flags &= ~CAM_DEV_REL_ON_COMPLETE; |
| 4805 | |
| 4806 | /* |
| 4807 | * Remove any timeouts that might be scheduled |
| 4808 | * to release this queue. |
| 4809 | */ |
| 4810 | if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { |
| 4811 | callout_stop(&dev->callout); |
| 4812 | dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; |
| 4813 | } |
| 4814 | |
| 4815 | /* |
| 4816 | * Now that we are unfrozen schedule the |
| 4817 | * device so any pending transactions are |
| 4818 | * run. |
| 4819 | */ |
| 4820 | if ((dev->ccbq.queue.entries > 0) |
| 4821 | && (xpt_schedule_dev_sendq(dev->target->bus, dev)) |
| 4822 | && (run_queue != 0)) { |
| 4823 | rundevq = 1; |
| 4824 | } |
| 4825 | } |
| 4826 | } |
| 4827 | if (rundevq != 0) |
| 4828 | xpt_run_dev_sendq(dev->target->bus); |
| 4829 | } |
| 4830 | |
| 4831 | void |
| 4832 | xpt_release_simq(struct cam_sim *sim, int run_queue) |
| 4833 | { |
| 4834 | struct camq *sendq; |
| 4835 | |
| 4836 | sim_lock_assert_owned(sim->lock); |
| 4837 | |
| 4838 | if (sim->devq == NULL) |
| 4839 | return; |
| 4840 | |
| 4841 | sendq = &(sim->devq->send_queue); |
| 4842 | if (sendq->qfrozen_cnt > 0) { |
| 4843 | sendq->qfrozen_cnt--; |
| 4844 | if (sendq->qfrozen_cnt == 0) { |
| 4845 | struct cam_eb *bus; |
| 4846 | |
| 4847 | /* |
| 4848 | * If there is a timeout scheduled to release this |
| 4849 | * sim queue, remove it. The queue frozen count is |
| 4850 | * already at 0. |
| 4851 | */ |
| 4852 | if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){ |
| 4853 | callout_stop(&sim->callout); |
| 4854 | sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING; |
| 4855 | } |
| 4856 | bus = xpt_find_bus(sim->path_id); |
| 4857 | |
| 4858 | if (run_queue) { |
| 4859 | /* |
| 4860 | * Now that we are unfrozen run the send queue. |
| 4861 | */ |
| 4862 | xpt_run_dev_sendq(bus); |
| 4863 | } |
| 4864 | xpt_release_bus(bus); |
| 4865 | } |
| 4866 | } |
| 4867 | } |
| 4868 | |
| 4869 | void |
| 4870 | xpt_done(union ccb *done_ccb) |
| 4871 | { |
| 4872 | struct cam_sim *sim; |
| 4873 | |
| 4874 | CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n")); |
| 4875 | if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) { |
| 4876 | /* |
| 4877 | * Queue up the request for handling by our SWI handler |
| 4878 | * any of the "non-immediate" type of ccbs. |
| 4879 | */ |
| 4880 | sim = done_ccb->ccb_h.path->bus->sim; |
| 4881 | switch (done_ccb->ccb_h.path->periph->type) { |
| 4882 | case CAM_PERIPH_BIO: |
| 4883 | spin_lock(&sim->sim_spin); |
| 4884 | TAILQ_INSERT_TAIL(&sim->sim_doneq, &done_ccb->ccb_h, |
| 4885 | sim_links.tqe); |
| 4886 | done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX; |
| 4887 | spin_unlock(&sim->sim_spin); |
| 4888 | if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { |
| 4889 | spin_lock(&cam_simq_spin); |
| 4890 | if ((sim->flags & CAM_SIM_ON_DONEQ) == 0) { |
| 4891 | TAILQ_INSERT_TAIL(&cam_simq, sim, |
| 4892 | links); |
| 4893 | sim->flags |= CAM_SIM_ON_DONEQ; |
| 4894 | } |
| 4895 | spin_unlock(&cam_simq_spin); |
| 4896 | } |
| 4897 | if ((done_ccb->ccb_h.flags & CAM_POLLED) == 0) |
| 4898 | setsoftcambio(); |
| 4899 | break; |
| 4900 | default: |
| 4901 | panic("unknown periph type %d", |
| 4902 | done_ccb->ccb_h.path->periph->type); |
| 4903 | } |
| 4904 | } |
| 4905 | } |
| 4906 | |
| 4907 | union ccb * |
| 4908 | xpt_alloc_ccb(void) |
| 4909 | { |
| 4910 | union ccb *new_ccb; |
| 4911 | |
| 4912 | new_ccb = kmalloc(sizeof(*new_ccb), M_CAMXPT, M_INTWAIT | M_ZERO); |
| 4913 | return (new_ccb); |
| 4914 | } |
| 4915 | |
| 4916 | void |
| 4917 | xpt_free_ccb(union ccb *free_ccb) |
| 4918 | { |
| 4919 | kfree(free_ccb, M_CAMXPT); |
| 4920 | } |
| 4921 | |
| 4922 | |
| 4923 | |
| 4924 | /* Private XPT functions */ |
| 4925 | |
| 4926 | /* |
| 4927 | * Get a CAM control block for the caller. Charge the structure to the device |
| 4928 | * referenced by the path. If the this device has no 'credits' then the |
| 4929 | * device already has the maximum number of outstanding operations under way |
| 4930 | * and we return NULL. If we don't have sufficient resources to allocate more |
| 4931 | * ccbs, we also return NULL. |
| 4932 | */ |
| 4933 | static union ccb * |
| 4934 | xpt_get_ccb(struct cam_ed *device) |
| 4935 | { |
| 4936 | union ccb *new_ccb; |
| 4937 | struct cam_sim *sim; |
| 4938 | |
| 4939 | sim = device->sim; |
| 4940 | if ((new_ccb = (union ccb *)SLIST_FIRST(&sim->ccb_freeq)) == NULL) { |
| 4941 | new_ccb = xpt_alloc_ccb(); |
| 4942 | if ((sim->flags & CAM_SIM_MPSAFE) == 0) |
| 4943 | callout_init(&new_ccb->ccb_h.timeout_ch); |
| 4944 | SLIST_INSERT_HEAD(&sim->ccb_freeq, &new_ccb->ccb_h, |
| 4945 | xpt_links.sle); |
| 4946 | sim->ccb_count++; |
| 4947 | } |
| 4948 | cam_ccbq_take_opening(&device->ccbq); |
| 4949 | SLIST_REMOVE_HEAD(&sim->ccb_freeq, xpt_links.sle); |
| 4950 | return (new_ccb); |
| 4951 | } |
| 4952 | |
| 4953 | static void |
| 4954 | xpt_release_bus(struct cam_eb *bus) |
| 4955 | { |
| 4956 | |
| 4957 | if ((--bus->refcount == 0) |
| 4958 | && (TAILQ_FIRST(&bus->et_entries) == NULL)) { |
| 4959 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 4960 | TAILQ_REMOVE(&xsoftc.xpt_busses, bus, links); |
| 4961 | xsoftc.bus_generation++; |
| 4962 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 4963 | kfree(bus, M_CAMXPT); |
| 4964 | } |
| 4965 | } |
| 4966 | |
| 4967 | static struct cam_et * |
| 4968 | xpt_alloc_target(struct cam_eb *bus, target_id_t target_id) |
| 4969 | { |
| 4970 | struct cam_et *target; |
| 4971 | struct cam_et *cur_target; |
| 4972 | |
| 4973 | target = kmalloc(sizeof(*target), M_CAMXPT, M_INTWAIT); |
| 4974 | |
| 4975 | TAILQ_INIT(&target->ed_entries); |
| 4976 | target->bus = bus; |
| 4977 | target->target_id = target_id; |
| 4978 | target->refcount = 1; |
| 4979 | target->generation = 0; |
| 4980 | timevalclear(&target->last_reset); |
| 4981 | /* |
| 4982 | * Hold a reference to our parent bus so it |
| 4983 | * will not go away before we do. |
| 4984 | */ |
| 4985 | bus->refcount++; |
| 4986 | |
| 4987 | /* Insertion sort into our bus's target list */ |
| 4988 | cur_target = TAILQ_FIRST(&bus->et_entries); |
| 4989 | while (cur_target != NULL && cur_target->target_id < target_id) |
| 4990 | cur_target = TAILQ_NEXT(cur_target, links); |
| 4991 | |
| 4992 | if (cur_target != NULL) { |
| 4993 | TAILQ_INSERT_BEFORE(cur_target, target, links); |
| 4994 | } else { |
| 4995 | TAILQ_INSERT_TAIL(&bus->et_entries, target, links); |
| 4996 | } |
| 4997 | bus->generation++; |
| 4998 | return (target); |
| 4999 | } |
| 5000 | |
| 5001 | static void |
| 5002 | xpt_release_target(struct cam_eb *bus, struct cam_et *target) |
| 5003 | { |
| 5004 | if (target->refcount == 1) { |
| 5005 | KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL); |
| 5006 | TAILQ_REMOVE(&bus->et_entries, target, links); |
| 5007 | bus->generation++; |
| 5008 | xpt_release_bus(bus); |
| 5009 | KKASSERT(target->refcount == 1); |
| 5010 | kfree(target, M_CAMXPT); |
| 5011 | } else { |
| 5012 | --target->refcount; |
| 5013 | } |
| 5014 | } |
| 5015 | |
| 5016 | static struct cam_ed * |
| 5017 | xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id) |
| 5018 | { |
| 5019 | struct cam_path path; |
| 5020 | struct cam_ed *device; |
| 5021 | struct cam_devq *devq; |
| 5022 | cam_status status; |
| 5023 | |
| 5024 | /* |
| 5025 | * Disallow new devices while trying to deregister a sim |
| 5026 | */ |
| 5027 | if (bus->sim->flags & CAM_SIM_DEREGISTERED) |
| 5028 | return (NULL); |
| 5029 | |
| 5030 | /* |
| 5031 | * Make space for us in the device queue on our bus |
| 5032 | */ |
| 5033 | devq = bus->sim->devq; |
| 5034 | if (devq == NULL) |
| 5035 | return(NULL); |
| 5036 | status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1); |
| 5037 | |
| 5038 | if (status != CAM_REQ_CMP) { |
| 5039 | device = NULL; |
| 5040 | } else { |
| 5041 | device = kmalloc(sizeof(*device), M_CAMXPT, M_INTWAIT); |
| 5042 | } |
| 5043 | |
| 5044 | if (device != NULL) { |
| 5045 | struct cam_ed *cur_device; |
| 5046 | |
| 5047 | cam_init_pinfo(&device->alloc_ccb_entry.pinfo); |
| 5048 | device->alloc_ccb_entry.device = device; |
| 5049 | cam_init_pinfo(&device->send_ccb_entry.pinfo); |
| 5050 | device->send_ccb_entry.device = device; |
| 5051 | device->target = target; |
| 5052 | device->lun_id = lun_id; |
| 5053 | device->sim = bus->sim; |
| 5054 | /* Initialize our queues */ |
| 5055 | if (camq_init(&device->drvq, 0) != 0) { |
| 5056 | kfree(device, M_CAMXPT); |
| 5057 | return (NULL); |
| 5058 | } |
| 5059 | if (cam_ccbq_init(&device->ccbq, |
| 5060 | bus->sim->max_dev_openings) != 0) { |
| 5061 | camq_fini(&device->drvq); |
| 5062 | kfree(device, M_CAMXPT); |
| 5063 | return (NULL); |
| 5064 | } |
| 5065 | SLIST_INIT(&device->asyncs); |
| 5066 | SLIST_INIT(&device->periphs); |
| 5067 | device->generation = 0; |
| 5068 | device->owner = NULL; |
| 5069 | /* |
| 5070 | * Take the default quirk entry until we have inquiry |
| 5071 | * data and can determine a better quirk to use. |
| 5072 | */ |
| 5073 | device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1]; |
| 5074 | bzero(&device->inq_data, sizeof(device->inq_data)); |
| 5075 | device->inq_flags = 0; |
| 5076 | device->queue_flags = 0; |
| 5077 | device->serial_num = NULL; |
| 5078 | device->serial_num_len = 0; |
| 5079 | device->qfrozen_cnt = 0; |
| 5080 | device->flags = CAM_DEV_UNCONFIGURED; |
| 5081 | device->tag_delay_count = 0; |
| 5082 | device->tag_saved_openings = 0; |
| 5083 | device->refcount = 1; |
| 5084 | callout_init(&device->callout); |
| 5085 | |
| 5086 | /* |
| 5087 | * Hold a reference to our parent target so it |
| 5088 | * will not go away before we do. |
| 5089 | */ |
| 5090 | target->refcount++; |
| 5091 | |
| 5092 | /* |
| 5093 | * XXX should be limited by number of CCBs this bus can |
| 5094 | * do. |
| 5095 | */ |
| 5096 | bus->sim->max_ccbs += device->ccbq.devq_openings; |
| 5097 | /* Insertion sort into our target's device list */ |
| 5098 | cur_device = TAILQ_FIRST(&target->ed_entries); |
| 5099 | while (cur_device != NULL && cur_device->lun_id < lun_id) |
| 5100 | cur_device = TAILQ_NEXT(cur_device, links); |
| 5101 | if (cur_device != NULL) { |
| 5102 | TAILQ_INSERT_BEFORE(cur_device, device, links); |
| 5103 | } else { |
| 5104 | TAILQ_INSERT_TAIL(&target->ed_entries, device, links); |
| 5105 | } |
| 5106 | target->generation++; |
| 5107 | if (lun_id != CAM_LUN_WILDCARD) { |
| 5108 | xpt_compile_path(&path, |
| 5109 | NULL, |
| 5110 | bus->path_id, |
| 5111 | target->target_id, |
| 5112 | lun_id); |
| 5113 | xpt_devise_transport(&path); |
| 5114 | xpt_release_path(&path); |
| 5115 | } |
| 5116 | } |
| 5117 | return (device); |
| 5118 | } |
| 5119 | |
| 5120 | static void |
| 5121 | xpt_reference_device(struct cam_ed *device) |
| 5122 | { |
| 5123 | ++device->refcount; |
| 5124 | } |
| 5125 | |
| 5126 | static void |
| 5127 | xpt_release_device(struct cam_eb *bus, struct cam_et *target, |
| 5128 | struct cam_ed *device) |
| 5129 | { |
| 5130 | struct cam_devq *devq; |
| 5131 | |
| 5132 | if (device->refcount == 1) { |
| 5133 | KKASSERT(device->flags & CAM_DEV_UNCONFIGURED); |
| 5134 | |
| 5135 | if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX |
| 5136 | || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX) |
| 5137 | panic("Removing device while still queued for ccbs"); |
| 5138 | |
| 5139 | if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) { |
| 5140 | device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING; |
| 5141 | callout_stop(&device->callout); |
| 5142 | } |
| 5143 | |
| 5144 | TAILQ_REMOVE(&target->ed_entries, device,links); |
| 5145 | target->generation++; |
| 5146 | bus->sim->max_ccbs -= device->ccbq.devq_openings; |
| 5147 | if ((devq = bus->sim->devq) != NULL) { |
| 5148 | /* Release our slot in the devq */ |
| 5149 | cam_devq_resize(devq, devq->alloc_queue.array_size - 1); |
| 5150 | } |
| 5151 | camq_fini(&device->drvq); |
| 5152 | camq_fini(&device->ccbq.queue); |
| 5153 | xpt_release_target(bus, target); |
| 5154 | KKASSERT(device->refcount == 1); |
| 5155 | kfree(device, M_CAMXPT); |
| 5156 | } else { |
| 5157 | --device->refcount; |
| 5158 | } |
| 5159 | } |
| 5160 | |
| 5161 | static u_int32_t |
| 5162 | xpt_dev_ccbq_resize(struct cam_path *path, int newopenings) |
| 5163 | { |
| 5164 | int diff; |
| 5165 | int result; |
| 5166 | struct cam_ed *dev; |
| 5167 | |
| 5168 | dev = path->device; |
| 5169 | |
| 5170 | diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings); |
| 5171 | result = cam_ccbq_resize(&dev->ccbq, newopenings); |
| 5172 | if (result == CAM_REQ_CMP && (diff < 0)) { |
| 5173 | dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED; |
| 5174 | } |
| 5175 | if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 |
| 5176 | || (dev->inq_flags & SID_CmdQue) != 0) |
| 5177 | dev->tag_saved_openings = newopenings; |
| 5178 | /* Adjust the global limit */ |
| 5179 | dev->sim->max_ccbs += diff; |
| 5180 | return (result); |
| 5181 | } |
| 5182 | |
| 5183 | static struct cam_eb * |
| 5184 | xpt_find_bus(path_id_t path_id) |
| 5185 | { |
| 5186 | struct cam_eb *bus; |
| 5187 | |
| 5188 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 5189 | TAILQ_FOREACH(bus, &xsoftc.xpt_busses, links) { |
| 5190 | if (bus->path_id == path_id) { |
| 5191 | bus->refcount++; |
| 5192 | break; |
| 5193 | } |
| 5194 | } |
| 5195 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 5196 | return (bus); |
| 5197 | } |
| 5198 | |
| 5199 | static struct cam_et * |
| 5200 | xpt_find_target(struct cam_eb *bus, target_id_t target_id) |
| 5201 | { |
| 5202 | struct cam_et *target; |
| 5203 | |
| 5204 | TAILQ_FOREACH(target, &bus->et_entries, links) { |
| 5205 | if (target->target_id == target_id) { |
| 5206 | target->refcount++; |
| 5207 | break; |
| 5208 | } |
| 5209 | } |
| 5210 | return (target); |
| 5211 | } |
| 5212 | |
| 5213 | static struct cam_ed * |
| 5214 | xpt_find_device(struct cam_et *target, lun_id_t lun_id) |
| 5215 | { |
| 5216 | struct cam_ed *device; |
| 5217 | |
| 5218 | TAILQ_FOREACH(device, &target->ed_entries, links) { |
| 5219 | if (device->lun_id == lun_id) { |
| 5220 | device->refcount++; |
| 5221 | break; |
| 5222 | } |
| 5223 | } |
| 5224 | return (device); |
| 5225 | } |
| 5226 | |
| 5227 | typedef struct { |
| 5228 | union ccb *request_ccb; |
| 5229 | struct ccb_pathinq *cpi; |
| 5230 | int counter; |
| 5231 | } xpt_scan_bus_info; |
| 5232 | |
| 5233 | /* |
| 5234 | * To start a scan, request_ccb is an XPT_SCAN_BUS ccb. |
| 5235 | * As the scan progresses, xpt_scan_bus is used as the |
| 5236 | * callback on completion function. |
| 5237 | */ |
| 5238 | static void |
| 5239 | xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb) |
| 5240 | { |
| 5241 | CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, |
| 5242 | ("xpt_scan_bus\n")); |
| 5243 | switch (request_ccb->ccb_h.func_code) { |
| 5244 | case XPT_SCAN_BUS: |
| 5245 | { |
| 5246 | xpt_scan_bus_info *scan_info; |
| 5247 | union ccb *work_ccb; |
| 5248 | struct cam_path *path; |
| 5249 | u_int i; |
| 5250 | u_int max_target; |
| 5251 | u_int initiator_id; |
| 5252 | |
| 5253 | /* Find out the characteristics of the bus */ |
| 5254 | work_ccb = xpt_alloc_ccb(); |
| 5255 | xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path, |
| 5256 | request_ccb->ccb_h.pinfo.priority); |
| 5257 | work_ccb->ccb_h.func_code = XPT_PATH_INQ; |
| 5258 | xpt_action(work_ccb); |
| 5259 | if (work_ccb->ccb_h.status != CAM_REQ_CMP) { |
| 5260 | request_ccb->ccb_h.status = work_ccb->ccb_h.status; |
| 5261 | xpt_free_ccb(work_ccb); |
| 5262 | xpt_done(request_ccb); |
| 5263 | return; |
| 5264 | } |
| 5265 | |
| 5266 | if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) { |
| 5267 | /* |
| 5268 | * Can't scan the bus on an adapter that |
| 5269 | * cannot perform the initiator role. |
| 5270 | */ |
| 5271 | request_ccb->ccb_h.status = CAM_REQ_CMP; |
| 5272 | xpt_free_ccb(work_ccb); |
| 5273 | xpt_done(request_ccb); |
| 5274 | return; |
| 5275 | } |
| 5276 | |
| 5277 | /* Save some state for use while we probe for devices */ |
| 5278 | scan_info = (xpt_scan_bus_info *) |
| 5279 | kmalloc(sizeof(xpt_scan_bus_info), M_CAMXPT, M_INTWAIT); |
| 5280 | scan_info->request_ccb = request_ccb; |
| 5281 | scan_info->cpi = &work_ccb->cpi; |
| 5282 | |
| 5283 | /* Cache on our stack so we can work asynchronously */ |
| 5284 | max_target = scan_info->cpi->max_target; |
| 5285 | initiator_id = scan_info->cpi->initiator_id; |
| 5286 | |
| 5287 | |
| 5288 | /* |
| 5289 | * We can scan all targets in parallel, or do it sequentially. |
| 5290 | */ |
| 5291 | if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { |
| 5292 | max_target = 0; |
| 5293 | scan_info->counter = 0; |
| 5294 | } else { |
| 5295 | scan_info->counter = scan_info->cpi->max_target + 1; |
| 5296 | if (scan_info->cpi->initiator_id < scan_info->counter) { |
| 5297 | scan_info->counter--; |
| 5298 | } |
| 5299 | } |
| 5300 | |
| 5301 | for (i = 0; i <= max_target; i++) { |
| 5302 | cam_status status; |
| 5303 | if (i == initiator_id) |
| 5304 | continue; |
| 5305 | |
| 5306 | status = xpt_create_path(&path, xpt_periph, |
| 5307 | request_ccb->ccb_h.path_id, |
| 5308 | i, 0); |
| 5309 | if (status != CAM_REQ_CMP) { |
| 5310 | kprintf("xpt_scan_bus: xpt_create_path failed" |
| 5311 | " with status %#x, bus scan halted\n", |
| 5312 | status); |
| 5313 | kfree(scan_info, M_CAMXPT); |
| 5314 | request_ccb->ccb_h.status = status; |
| 5315 | xpt_free_ccb(work_ccb); |
| 5316 | xpt_done(request_ccb); |
| 5317 | break; |
| 5318 | } |
| 5319 | work_ccb = xpt_alloc_ccb(); |
| 5320 | xpt_setup_ccb(&work_ccb->ccb_h, path, |
| 5321 | request_ccb->ccb_h.pinfo.priority); |
| 5322 | work_ccb->ccb_h.func_code = XPT_SCAN_LUN; |
| 5323 | work_ccb->ccb_h.cbfcnp = xpt_scan_bus; |
| 5324 | work_ccb->ccb_h.ppriv_ptr0 = scan_info; |
| 5325 | work_ccb->crcn.flags = request_ccb->crcn.flags; |
| 5326 | xpt_action(work_ccb); |
| 5327 | } |
| 5328 | break; |
| 5329 | } |
| 5330 | case XPT_SCAN_LUN: |
| 5331 | { |
| 5332 | cam_status status; |
| 5333 | struct cam_path *path; |
| 5334 | xpt_scan_bus_info *scan_info; |
| 5335 | path_id_t path_id; |
| 5336 | target_id_t target_id; |
| 5337 | lun_id_t lun_id; |
| 5338 | |
| 5339 | /* Reuse the same CCB to query if a device was really found */ |
| 5340 | scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0; |
| 5341 | xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path, |
| 5342 | request_ccb->ccb_h.pinfo.priority); |
| 5343 | request_ccb->ccb_h.func_code = XPT_GDEV_TYPE; |
| 5344 | |
| 5345 | path_id = request_ccb->ccb_h.path_id; |
| 5346 | target_id = request_ccb->ccb_h.target_id; |
| 5347 | lun_id = request_ccb->ccb_h.target_lun; |
| 5348 | xpt_action(request_ccb); |
| 5349 | |
| 5350 | if (request_ccb->ccb_h.status != CAM_REQ_CMP) { |
| 5351 | struct cam_ed *device; |
| 5352 | struct cam_et *target; |
| 5353 | int phl; |
| 5354 | |
| 5355 | /* |
| 5356 | * If we already probed lun 0 successfully, or |
| 5357 | * we have additional configured luns on this |
| 5358 | * target that might have "gone away", go onto |
| 5359 | * the next lun. |
| 5360 | */ |
| 5361 | target = request_ccb->ccb_h.path->target; |
| 5362 | /* |
| 5363 | * We may touch devices that we don't |
| 5364 | * hold references too, so ensure they |
| 5365 | * don't disappear out from under us. |
| 5366 | * The target above is referenced by the |
| 5367 | * path in the request ccb. |
| 5368 | */ |
| 5369 | phl = 0; |
| 5370 | device = TAILQ_FIRST(&target->ed_entries); |
| 5371 | if (device != NULL) { |
| 5372 | phl = CAN_SRCH_HI_SPARSE(device); |
| 5373 | if (device->lun_id == 0) |
| 5374 | device = TAILQ_NEXT(device, links); |
| 5375 | } |
| 5376 | if ((lun_id != 0) || (device != NULL)) { |
| 5377 | if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl) |
| 5378 | lun_id++; |
| 5379 | } |
| 5380 | } else { |
| 5381 | struct cam_ed *device; |
| 5382 | |
| 5383 | device = request_ccb->ccb_h.path->device; |
| 5384 | |
| 5385 | if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) { |
| 5386 | /* Try the next lun */ |
| 5387 | if (lun_id < (CAM_SCSI2_MAXLUN-1) |
| 5388 | || CAN_SRCH_HI_DENSE(device)) |
| 5389 | lun_id++; |
| 5390 | } |
| 5391 | } |
| 5392 | |
| 5393 | /* |
| 5394 | * Free the current request path- we're done with it. |
| 5395 | */ |
| 5396 | xpt_free_path(request_ccb->ccb_h.path); |
| 5397 | |
| 5398 | /* |
| 5399 | * Check to see if we scan any further luns. |
| 5400 | */ |
| 5401 | if (lun_id == request_ccb->ccb_h.target_lun |
| 5402 | || lun_id > scan_info->cpi->max_lun) { |
| 5403 | int done; |
| 5404 | |
| 5405 | hop_again: |
| 5406 | done = 0; |
| 5407 | if (scan_info->cpi->hba_misc & PIM_SEQSCAN) { |
| 5408 | scan_info->counter++; |
| 5409 | if (scan_info->counter == |
| 5410 | scan_info->cpi->initiator_id) { |
| 5411 | scan_info->counter++; |
| 5412 | } |
| 5413 | if (scan_info->counter >= |
| 5414 | scan_info->cpi->max_target+1) { |
| 5415 | done = 1; |
| 5416 | } |
| 5417 | } else { |
| 5418 | scan_info->counter--; |
| 5419 | if (scan_info->counter == 0) { |
| 5420 | done = 1; |
| 5421 | } |
| 5422 | } |
| 5423 | if (done) { |
| 5424 | xpt_free_ccb(request_ccb); |
| 5425 | xpt_free_ccb((union ccb *)scan_info->cpi); |
| 5426 | request_ccb = scan_info->request_ccb; |
| 5427 | kfree(scan_info, M_CAMXPT); |
| 5428 | request_ccb->ccb_h.status = CAM_REQ_CMP; |
| 5429 | xpt_done(request_ccb); |
| 5430 | break; |
| 5431 | } |
| 5432 | |
| 5433 | if ((scan_info->cpi->hba_misc & PIM_SEQSCAN) == 0) { |
| 5434 | break; |
| 5435 | } |
| 5436 | status = xpt_create_path(&path, xpt_periph, |
| 5437 | scan_info->request_ccb->ccb_h.path_id, |
| 5438 | scan_info->counter, 0); |
| 5439 | if (status != CAM_REQ_CMP) { |
| 5440 | kprintf("xpt_scan_bus: xpt_create_path failed" |
| 5441 | " with status %#x, bus scan halted\n", |
| 5442 | status); |
| 5443 | xpt_free_ccb(request_ccb); |
| 5444 | xpt_free_ccb((union ccb *)scan_info->cpi); |
| 5445 | request_ccb = scan_info->request_ccb; |
| 5446 | kfree(scan_info, M_CAMXPT); |
| 5447 | request_ccb->ccb_h.status = status; |
| 5448 | xpt_done(request_ccb); |
| 5449 | break; |
| 5450 | } |
| 5451 | xpt_setup_ccb(&request_ccb->ccb_h, path, |
| 5452 | request_ccb->ccb_h.pinfo.priority); |
| 5453 | request_ccb->ccb_h.func_code = XPT_SCAN_LUN; |
| 5454 | request_ccb->ccb_h.cbfcnp = xpt_scan_bus; |
| 5455 | request_ccb->ccb_h.ppriv_ptr0 = scan_info; |
| 5456 | request_ccb->crcn.flags = |
| 5457 | scan_info->request_ccb->crcn.flags; |
| 5458 | } else { |
| 5459 | status = xpt_create_path(&path, xpt_periph, |
| 5460 | path_id, target_id, lun_id); |
| 5461 | if (status != CAM_REQ_CMP) { |
| 5462 | kprintf("xpt_scan_bus: xpt_create_path failed " |
| 5463 | "with status %#x, halting LUN scan\n", |
| 5464 | status); |
| 5465 | goto hop_again; |
| 5466 | } |
| 5467 | xpt_setup_ccb(&request_ccb->ccb_h, path, |
| 5468 | request_ccb->ccb_h.pinfo.priority); |
| 5469 | request_ccb->ccb_h.func_code = XPT_SCAN_LUN; |
| 5470 | request_ccb->ccb_h.cbfcnp = xpt_scan_bus; |
| 5471 | request_ccb->ccb_h.ppriv_ptr0 = scan_info; |
| 5472 | request_ccb->crcn.flags = |
| 5473 | scan_info->request_ccb->crcn.flags; |
| 5474 | } |
| 5475 | xpt_action(request_ccb); |
| 5476 | break; |
| 5477 | } |
| 5478 | default: |
| 5479 | break; |
| 5480 | } |
| 5481 | } |
| 5482 | |
| 5483 | typedef enum { |
| 5484 | PROBE_TUR, |
| 5485 | PROBE_INQUIRY, /* this counts as DV0 for Basic Domain Validation */ |
| 5486 | PROBE_FULL_INQUIRY, |
| 5487 | PROBE_MODE_SENSE, |
| 5488 | PROBE_SERIAL_NUM_0, |
| 5489 | PROBE_SERIAL_NUM_1, |
| 5490 | PROBE_TUR_FOR_NEGOTIATION, |
| 5491 | PROBE_INQUIRY_BASIC_DV1, |
| 5492 | PROBE_INQUIRY_BASIC_DV2, |
| 5493 | PROBE_DV_EXIT |
| 5494 | } probe_action; |
| 5495 | |
| 5496 | typedef enum { |
| 5497 | PROBE_INQUIRY_CKSUM = 0x01, |
| 5498 | PROBE_SERIAL_CKSUM = 0x02, |
| 5499 | PROBE_NO_ANNOUNCE = 0x04 |
| 5500 | } probe_flags; |
| 5501 | |
| 5502 | typedef struct { |
| 5503 | TAILQ_HEAD(, ccb_hdr) request_ccbs; |
| 5504 | probe_action action; |
| 5505 | union ccb saved_ccb; |
| 5506 | probe_flags flags; |
| 5507 | MD5_CTX context; |
| 5508 | u_int8_t digest[16]; |
| 5509 | }probe_softc; |
| 5510 | |
| 5511 | static void |
| 5512 | xpt_scan_lun(struct cam_periph *periph, struct cam_path *path, |
| 5513 | cam_flags flags, union ccb *request_ccb) |
| 5514 | { |
| 5515 | struct ccb_pathinq cpi; |
| 5516 | cam_status status; |
| 5517 | struct cam_path *new_path; |
| 5518 | struct cam_periph *old_periph; |
| 5519 | |
| 5520 | CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE, |
| 5521 | ("xpt_scan_lun\n")); |
| 5522 | |
| 5523 | xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); |
| 5524 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 5525 | xpt_action((union ccb *)&cpi); |
| 5526 | |
| 5527 | if (cpi.ccb_h.status != CAM_REQ_CMP) { |
| 5528 | if (request_ccb != NULL) { |
| 5529 | request_ccb->ccb_h.status = cpi.ccb_h.status; |
| 5530 | xpt_done(request_ccb); |
| 5531 | } |
| 5532 | return; |
| 5533 | } |
| 5534 | |
| 5535 | if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) { |
| 5536 | /* |
| 5537 | * Can't scan the bus on an adapter that |
| 5538 | * cannot perform the initiator role. |
| 5539 | */ |
| 5540 | if (request_ccb != NULL) { |
| 5541 | request_ccb->ccb_h.status = CAM_REQ_CMP; |
| 5542 | xpt_done(request_ccb); |
| 5543 | } |
| 5544 | return; |
| 5545 | } |
| 5546 | |
| 5547 | if (request_ccb == NULL) { |
| 5548 | request_ccb = kmalloc(sizeof(union ccb), M_CAMXPT, M_INTWAIT); |
| 5549 | new_path = kmalloc(sizeof(*new_path), M_CAMXPT, M_INTWAIT); |
| 5550 | status = xpt_compile_path(new_path, xpt_periph, |
| 5551 | path->bus->path_id, |
| 5552 | path->target->target_id, |
| 5553 | path->device->lun_id); |
| 5554 | |
| 5555 | if (status != CAM_REQ_CMP) { |
| 5556 | xpt_print(path, "xpt_scan_lun: can't compile path, " |
| 5557 | "can't continue\n"); |
| 5558 | kfree(request_ccb, M_CAMXPT); |
| 5559 | kfree(new_path, M_CAMXPT); |
| 5560 | return; |
| 5561 | } |
| 5562 | xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1); |
| 5563 | request_ccb->ccb_h.cbfcnp = xptscandone; |
| 5564 | request_ccb->ccb_h.func_code = XPT_SCAN_LUN; |
| 5565 | request_ccb->crcn.flags = flags; |
| 5566 | } |
| 5567 | |
| 5568 | if ((old_periph = cam_periph_find(path, "probe")) != NULL) { |
| 5569 | probe_softc *softc; |
| 5570 | |
| 5571 | softc = (probe_softc *)old_periph->softc; |
| 5572 | TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, |
| 5573 | periph_links.tqe); |
| 5574 | } else { |
| 5575 | status = cam_periph_alloc(proberegister, NULL, probecleanup, |
| 5576 | probestart, "probe", |
| 5577 | CAM_PERIPH_BIO, |
| 5578 | request_ccb->ccb_h.path, NULL, 0, |
| 5579 | request_ccb); |
| 5580 | |
| 5581 | if (status != CAM_REQ_CMP) { |
| 5582 | xpt_print(path, "xpt_scan_lun: cam_alloc_periph " |
| 5583 | "returned an error, can't continue probe\n"); |
| 5584 | request_ccb->ccb_h.status = status; |
| 5585 | xpt_done(request_ccb); |
| 5586 | } |
| 5587 | } |
| 5588 | } |
| 5589 | |
| 5590 | static void |
| 5591 | xptscandone(struct cam_periph *periph, union ccb *done_ccb) |
| 5592 | { |
| 5593 | xpt_release_path(done_ccb->ccb_h.path); |
| 5594 | kfree(done_ccb->ccb_h.path, M_CAMXPT); |
| 5595 | kfree(done_ccb, M_CAMXPT); |
| 5596 | } |
| 5597 | |
| 5598 | static cam_status |
| 5599 | proberegister(struct cam_periph *periph, void *arg) |
| 5600 | { |
| 5601 | union ccb *request_ccb; /* CCB representing the probe request */ |
| 5602 | cam_status status; |
| 5603 | probe_softc *softc; |
| 5604 | |
| 5605 | request_ccb = (union ccb *)arg; |
| 5606 | if (periph == NULL) { |
| 5607 | kprintf("proberegister: periph was NULL!!\n"); |
| 5608 | return(CAM_REQ_CMP_ERR); |
| 5609 | } |
| 5610 | |
| 5611 | if (request_ccb == NULL) { |
| 5612 | kprintf("proberegister: no probe CCB, " |
| 5613 | "can't register device\n"); |
| 5614 | return(CAM_REQ_CMP_ERR); |
| 5615 | } |
| 5616 | |
| 5617 | softc = kmalloc(sizeof(*softc), M_CAMXPT, M_INTWAIT | M_ZERO); |
| 5618 | TAILQ_INIT(&softc->request_ccbs); |
| 5619 | TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h, |
| 5620 | periph_links.tqe); |
| 5621 | softc->flags = 0; |
| 5622 | periph->softc = softc; |
| 5623 | status = cam_periph_acquire(periph); |
| 5624 | if (status != CAM_REQ_CMP) { |
| 5625 | return (status); |
| 5626 | } |
| 5627 | |
| 5628 | |
| 5629 | /* |
| 5630 | * Ensure we've waited at least a bus settle |
| 5631 | * delay before attempting to probe the device. |
| 5632 | * For HBAs that don't do bus resets, this won't make a difference. |
| 5633 | */ |
| 5634 | cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset, |
| 5635 | scsi_delay); |
| 5636 | probeschedule(periph); |
| 5637 | return(CAM_REQ_CMP); |
| 5638 | } |
| 5639 | |
| 5640 | static void |
| 5641 | probeschedule(struct cam_periph *periph) |
| 5642 | { |
| 5643 | struct ccb_pathinq cpi; |
| 5644 | union ccb *ccb; |
| 5645 | probe_softc *softc; |
| 5646 | |
| 5647 | softc = (probe_softc *)periph->softc; |
| 5648 | ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); |
| 5649 | |
| 5650 | xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1); |
| 5651 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 5652 | xpt_action((union ccb *)&cpi); |
| 5653 | |
| 5654 | /* |
| 5655 | * If a device has gone away and another device, or the same one, |
| 5656 | * is back in the same place, it should have a unit attention |
| 5657 | * condition pending. It will not report the unit attention in |
| 5658 | * response to an inquiry, which may leave invalid transfer |
| 5659 | * negotiations in effect. The TUR will reveal the unit attention |
| 5660 | * condition. Only send the TUR for lun 0, since some devices |
| 5661 | * will get confused by commands other than inquiry to non-existent |
| 5662 | * luns. If you think a device has gone away start your scan from |
| 5663 | * lun 0. This will insure that any bogus transfer settings are |
| 5664 | * invalidated. |
| 5665 | * |
| 5666 | * If we haven't seen the device before and the controller supports |
| 5667 | * some kind of transfer negotiation, negotiate with the first |
| 5668 | * sent command if no bus reset was performed at startup. This |
| 5669 | * ensures that the device is not confused by transfer negotiation |
| 5670 | * settings left over by loader or BIOS action. |
| 5671 | */ |
| 5672 | if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0) |
| 5673 | && (ccb->ccb_h.target_lun == 0)) { |
| 5674 | softc->action = PROBE_TUR; |
| 5675 | } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0 |
| 5676 | && (cpi.hba_misc & PIM_NOBUSRESET) != 0) { |
| 5677 | proberequestdefaultnegotiation(periph); |
| 5678 | softc->action = PROBE_INQUIRY; |
| 5679 | } else { |
| 5680 | softc->action = PROBE_INQUIRY; |
| 5681 | } |
| 5682 | |
| 5683 | if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE) |
| 5684 | softc->flags |= PROBE_NO_ANNOUNCE; |
| 5685 | else |
| 5686 | softc->flags &= ~PROBE_NO_ANNOUNCE; |
| 5687 | |
| 5688 | xpt_schedule(periph, ccb->ccb_h.pinfo.priority); |
| 5689 | } |
| 5690 | |
| 5691 | static void |
| 5692 | probestart(struct cam_periph *periph, union ccb *start_ccb) |
| 5693 | { |
| 5694 | /* Probe the device that our peripheral driver points to */ |
| 5695 | struct ccb_scsiio *csio; |
| 5696 | probe_softc *softc; |
| 5697 | |
| 5698 | CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n")); |
| 5699 | |
| 5700 | softc = (probe_softc *)periph->softc; |
| 5701 | csio = &start_ccb->csio; |
| 5702 | |
| 5703 | switch (softc->action) { |
| 5704 | case PROBE_TUR: |
| 5705 | case PROBE_TUR_FOR_NEGOTIATION: |
| 5706 | case PROBE_DV_EXIT: |
| 5707 | { |
| 5708 | scsi_test_unit_ready(csio, |
| 5709 | /*retries*/4, |
| 5710 | probedone, |
| 5711 | MSG_SIMPLE_Q_TAG, |
| 5712 | SSD_FULL_SIZE, |
| 5713 | /*timeout*/60000); |
| 5714 | break; |
| 5715 | } |
| 5716 | case PROBE_INQUIRY: |
| 5717 | case PROBE_FULL_INQUIRY: |
| 5718 | case PROBE_INQUIRY_BASIC_DV1: |
| 5719 | case PROBE_INQUIRY_BASIC_DV2: |
| 5720 | { |
| 5721 | u_int inquiry_len; |
| 5722 | struct scsi_inquiry_data *inq_buf; |
| 5723 | |
| 5724 | inq_buf = &periph->path->device->inq_data; |
| 5725 | |
| 5726 | /* |
| 5727 | * If the device is currently configured, we calculate an |
| 5728 | * MD5 checksum of the inquiry data, and if the serial number |
| 5729 | * length is greater than 0, add the serial number data |
| 5730 | * into the checksum as well. Once the inquiry and the |
| 5731 | * serial number check finish, we attempt to figure out |
| 5732 | * whether we still have the same device. |
| 5733 | */ |
| 5734 | if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { |
| 5735 | |
| 5736 | MD5Init(&softc->context); |
| 5737 | MD5Update(&softc->context, (unsigned char *)inq_buf, |
| 5738 | sizeof(struct scsi_inquiry_data)); |
| 5739 | softc->flags |= PROBE_INQUIRY_CKSUM; |
| 5740 | if (periph->path->device->serial_num_len > 0) { |
| 5741 | MD5Update(&softc->context, |
| 5742 | periph->path->device->serial_num, |
| 5743 | periph->path->device->serial_num_len); |
| 5744 | softc->flags |= PROBE_SERIAL_CKSUM; |
| 5745 | } |
| 5746 | MD5Final(softc->digest, &softc->context); |
| 5747 | } |
| 5748 | |
| 5749 | if (softc->action == PROBE_INQUIRY) |
| 5750 | inquiry_len = SHORT_INQUIRY_LENGTH; |
| 5751 | else |
| 5752 | inquiry_len = SID_ADDITIONAL_LENGTH(inq_buf); |
| 5753 | |
| 5754 | /* |
| 5755 | * Some parallel SCSI devices fail to send an |
| 5756 | * ignore wide residue message when dealing with |
| 5757 | * odd length inquiry requests. Round up to be |
| 5758 | * safe. |
| 5759 | */ |
| 5760 | inquiry_len = roundup2(inquiry_len, 2); |
| 5761 | |
| 5762 | if (softc->action == PROBE_INQUIRY_BASIC_DV1 |
| 5763 | || softc->action == PROBE_INQUIRY_BASIC_DV2) { |
| 5764 | inq_buf = kmalloc(inquiry_len, M_CAMXPT, M_INTWAIT); |
| 5765 | } |
| 5766 | scsi_inquiry(csio, |
| 5767 | /*retries*/4, |
| 5768 | probedone, |
| 5769 | MSG_SIMPLE_Q_TAG, |
| 5770 | (u_int8_t *)inq_buf, |
| 5771 | inquiry_len, |
| 5772 | /*evpd*/FALSE, |
| 5773 | /*page_code*/0, |
| 5774 | SSD_MIN_SIZE, |
| 5775 | /*timeout*/60 * 1000); |
| 5776 | break; |
| 5777 | } |
| 5778 | case PROBE_MODE_SENSE: |
| 5779 | { |
| 5780 | void *mode_buf; |
| 5781 | int mode_buf_len; |
| 5782 | |
| 5783 | mode_buf_len = sizeof(struct scsi_mode_header_6) |
| 5784 | + sizeof(struct scsi_mode_blk_desc) |
| 5785 | + sizeof(struct scsi_control_page); |
| 5786 | mode_buf = kmalloc(mode_buf_len, M_CAMXPT, M_INTWAIT); |
| 5787 | scsi_mode_sense(csio, |
| 5788 | /*retries*/4, |
| 5789 | probedone, |
| 5790 | MSG_SIMPLE_Q_TAG, |
| 5791 | /*dbd*/FALSE, |
| 5792 | SMS_PAGE_CTRL_CURRENT, |
| 5793 | SMS_CONTROL_MODE_PAGE, |
| 5794 | mode_buf, |
| 5795 | mode_buf_len, |
| 5796 | SSD_FULL_SIZE, |
| 5797 | /*timeout*/60000); |
| 5798 | break; |
| 5799 | } |
| 5800 | case PROBE_SERIAL_NUM_0: |
| 5801 | { |
| 5802 | struct scsi_vpd_supported_page_list *vpd_list = NULL; |
| 5803 | struct cam_ed *device; |
| 5804 | |
| 5805 | device = periph->path->device; |
| 5806 | if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) { |
| 5807 | vpd_list = kmalloc(sizeof(*vpd_list), M_CAMXPT, |
| 5808 | M_INTWAIT | M_ZERO); |
| 5809 | } |
| 5810 | |
| 5811 | if (vpd_list != NULL) { |
| 5812 | scsi_inquiry(csio, |
| 5813 | /*retries*/4, |
| 5814 | probedone, |
| 5815 | MSG_SIMPLE_Q_TAG, |
| 5816 | (u_int8_t *)vpd_list, |
| 5817 | sizeof(*vpd_list), |
| 5818 | /*evpd*/TRUE, |
| 5819 | SVPD_SUPPORTED_PAGE_LIST, |
| 5820 | SSD_MIN_SIZE, |
| 5821 | /*timeout*/60 * 1000); |
| 5822 | break; |
| 5823 | } |
| 5824 | /* |
| 5825 | * We'll have to do without, let our probedone |
| 5826 | * routine finish up for us. |
| 5827 | */ |
| 5828 | start_ccb->csio.data_ptr = NULL; |
| 5829 | probedone(periph, start_ccb); |
| 5830 | return; |
| 5831 | } |
| 5832 | case PROBE_SERIAL_NUM_1: |
| 5833 | { |
| 5834 | struct scsi_vpd_unit_serial_number *serial_buf; |
| 5835 | struct cam_ed* device; |
| 5836 | |
| 5837 | serial_buf = NULL; |
| 5838 | device = periph->path->device; |
| 5839 | device->serial_num = NULL; |
| 5840 | device->serial_num_len = 0; |
| 5841 | |
| 5842 | serial_buf = (struct scsi_vpd_unit_serial_number *) |
| 5843 | kmalloc(sizeof(*serial_buf), M_CAMXPT, |
| 5844 | M_INTWAIT | M_ZERO); |
| 5845 | scsi_inquiry(csio, |
| 5846 | /*retries*/4, |
| 5847 | probedone, |
| 5848 | MSG_SIMPLE_Q_TAG, |
| 5849 | (u_int8_t *)serial_buf, |
| 5850 | sizeof(*serial_buf), |
| 5851 | /*evpd*/TRUE, |
| 5852 | SVPD_UNIT_SERIAL_NUMBER, |
| 5853 | SSD_MIN_SIZE, |
| 5854 | /*timeout*/60 * 1000); |
| 5855 | break; |
| 5856 | } |
| 5857 | } |
| 5858 | xpt_action(start_ccb); |
| 5859 | } |
| 5860 | |
| 5861 | static void |
| 5862 | proberequestdefaultnegotiation(struct cam_periph *periph) |
| 5863 | { |
| 5864 | struct ccb_trans_settings cts; |
| 5865 | |
| 5866 | xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); |
| 5867 | cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; |
| 5868 | cts.type = CTS_TYPE_USER_SETTINGS; |
| 5869 | xpt_action((union ccb *)&cts); |
| 5870 | if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { |
| 5871 | return; |
| 5872 | } |
| 5873 | cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; |
| 5874 | cts.type = CTS_TYPE_CURRENT_SETTINGS; |
| 5875 | xpt_action((union ccb *)&cts); |
| 5876 | } |
| 5877 | |
| 5878 | /* |
| 5879 | * Backoff Negotiation Code- only pertinent for SPI devices. |
| 5880 | */ |
| 5881 | static int |
| 5882 | proberequestbackoff(struct cam_periph *periph, struct cam_ed *device) |
| 5883 | { |
| 5884 | struct ccb_trans_settings cts; |
| 5885 | struct ccb_trans_settings_spi *spi; |
| 5886 | |
| 5887 | memset(&cts, 0, sizeof (cts)); |
| 5888 | xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1); |
| 5889 | cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; |
| 5890 | cts.type = CTS_TYPE_CURRENT_SETTINGS; |
| 5891 | xpt_action((union ccb *)&cts); |
| 5892 | if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { |
| 5893 | if (bootverbose) { |
| 5894 | xpt_print(periph->path, |
| 5895 | "failed to get current device settings\n"); |
| 5896 | } |
| 5897 | return (0); |
| 5898 | } |
| 5899 | if (cts.transport != XPORT_SPI) { |
| 5900 | if (bootverbose) { |
| 5901 | xpt_print(periph->path, "not SPI transport\n"); |
| 5902 | } |
| 5903 | return (0); |
| 5904 | } |
| 5905 | spi = &cts.xport_specific.spi; |
| 5906 | |
| 5907 | /* |
| 5908 | * We cannot renegotiate sync rate if we don't have one. |
| 5909 | */ |
| 5910 | if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) { |
| 5911 | if (bootverbose) { |
| 5912 | xpt_print(periph->path, "no sync rate known\n"); |
| 5913 | } |
| 5914 | return (0); |
| 5915 | } |
| 5916 | |
| 5917 | /* |
| 5918 | * We'll assert that we don't have to touch PPR options- the |
| 5919 | * SIM will see what we do with period and offset and adjust |
| 5920 | * the PPR options as appropriate. |
| 5921 | */ |
| 5922 | |
| 5923 | /* |
| 5924 | * A sync rate with unknown or zero offset is nonsensical. |
| 5925 | * A sync period of zero means Async. |
| 5926 | */ |
| 5927 | if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0 |
| 5928 | || spi->sync_offset == 0 || spi->sync_period == 0) { |
| 5929 | if (bootverbose) { |
| 5930 | xpt_print(periph->path, "no sync rate available\n"); |
| 5931 | } |
| 5932 | return (0); |
| 5933 | } |
| 5934 | |
| 5935 | if (device->flags & CAM_DEV_DV_HIT_BOTTOM) { |
| 5936 | CAM_DEBUG(periph->path, CAM_DEBUG_INFO, |
| 5937 | ("hit async: giving up on DV\n")); |
| 5938 | return (0); |
| 5939 | } |
| 5940 | |
| 5941 | |
| 5942 | /* |
| 5943 | * Jump sync_period up by one, but stop at 5MHz and fall back to Async. |
| 5944 | * We don't try to remember 'last' settings to see if the SIM actually |
| 5945 | * gets into the speed we want to set. We check on the SIM telling |
| 5946 | * us that a requested speed is bad, but otherwise don't try and |
| 5947 | * check the speed due to the asynchronous and handshake nature |
| 5948 | * of speed setting. |
| 5949 | */ |
| 5950 | spi->valid = CTS_SPI_VALID_SYNC_RATE | CTS_SPI_VALID_SYNC_OFFSET; |
| 5951 | for (;;) { |
| 5952 | spi->sync_period++; |
| 5953 | if (spi->sync_period >= 0xf) { |
| 5954 | spi->sync_period = 0; |
| 5955 | spi->sync_offset = 0; |
| 5956 | CAM_DEBUG(periph->path, CAM_DEBUG_INFO, |
| 5957 | ("setting to async for DV\n")); |
| 5958 | /* |
| 5959 | * Once we hit async, we don't want to try |
| 5960 | * any more settings. |
| 5961 | */ |
| 5962 | device->flags |= CAM_DEV_DV_HIT_BOTTOM; |
| 5963 | } else if (bootverbose) { |
| 5964 | CAM_DEBUG(periph->path, CAM_DEBUG_INFO, |
| 5965 | ("DV: period 0x%x\n", spi->sync_period)); |
| 5966 | kprintf("setting period to 0x%x\n", spi->sync_period); |
| 5967 | } |
| 5968 | cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; |
| 5969 | cts.type = CTS_TYPE_CURRENT_SETTINGS; |
| 5970 | xpt_action((union ccb *)&cts); |
| 5971 | if ((cts.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { |
| 5972 | break; |
| 5973 | } |
| 5974 | CAM_DEBUG(periph->path, CAM_DEBUG_INFO, |
| 5975 | ("DV: failed to set period 0x%x\n", spi->sync_period)); |
| 5976 | if (spi->sync_period == 0) { |
| 5977 | return (0); |
| 5978 | } |
| 5979 | } |
| 5980 | return (1); |
| 5981 | } |
| 5982 | |
| 5983 | static void |
| 5984 | probedone(struct cam_periph *periph, union ccb *done_ccb) |
| 5985 | { |
| 5986 | probe_softc *softc; |
| 5987 | struct cam_path *path; |
| 5988 | u_int32_t priority; |
| 5989 | |
| 5990 | CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n")); |
| 5991 | |
| 5992 | softc = (probe_softc *)periph->softc; |
| 5993 | path = done_ccb->ccb_h.path; |
| 5994 | priority = done_ccb->ccb_h.pinfo.priority; |
| 5995 | |
| 5996 | switch (softc->action) { |
| 5997 | case PROBE_TUR: |
| 5998 | { |
| 5999 | if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { |
| 6000 | |
| 6001 | if (cam_periph_error(done_ccb, 0, |
| 6002 | SF_NO_PRINT, NULL) == ERESTART) |
| 6003 | return; |
| 6004 | else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) |
| 6005 | /* Don't wedge the queue */ |
| 6006 | xpt_release_devq(done_ccb->ccb_h.path, |
| 6007 | /*count*/1, |
| 6008 | /*run_queue*/TRUE); |
| 6009 | } |
| 6010 | softc->action = PROBE_INQUIRY; |
| 6011 | xpt_release_ccb(done_ccb); |
| 6012 | xpt_schedule(periph, priority); |
| 6013 | return; |
| 6014 | } |
| 6015 | case PROBE_INQUIRY: |
| 6016 | case PROBE_FULL_INQUIRY: |
| 6017 | { |
| 6018 | if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { |
| 6019 | struct scsi_inquiry_data *inq_buf; |
| 6020 | u_int8_t periph_qual; |
| 6021 | |
| 6022 | path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID; |
| 6023 | inq_buf = &path->device->inq_data; |
| 6024 | |
| 6025 | periph_qual = SID_QUAL(inq_buf); |
| 6026 | |
| 6027 | switch(periph_qual) { |
| 6028 | case SID_QUAL_LU_CONNECTED: |
| 6029 | { |
| 6030 | u_int8_t len; |
| 6031 | |
| 6032 | /* |
| 6033 | * We conservatively request only |
| 6034 | * SHORT_INQUIRY_LEN bytes of inquiry |
| 6035 | * information during our first try |
| 6036 | * at sending an INQUIRY. If the device |
| 6037 | * has more information to give, |
| 6038 | * perform a second request specifying |
| 6039 | * the amount of information the device |
| 6040 | * is willing to give. |
| 6041 | */ |
| 6042 | len = inq_buf->additional_length |
| 6043 | + offsetof(struct scsi_inquiry_data, |
| 6044 | additional_length) + 1; |
| 6045 | if (softc->action == PROBE_INQUIRY |
| 6046 | && len > SHORT_INQUIRY_LENGTH) { |
| 6047 | softc->action = PROBE_FULL_INQUIRY; |
| 6048 | xpt_release_ccb(done_ccb); |
| 6049 | xpt_schedule(periph, priority); |
| 6050 | return; |
| 6051 | } |
| 6052 | |
| 6053 | xpt_find_quirk(path->device); |
| 6054 | |
| 6055 | xpt_devise_transport(path); |
| 6056 | if (INQ_DATA_TQ_ENABLED(inq_buf)) |
| 6057 | softc->action = PROBE_MODE_SENSE; |
| 6058 | else |
| 6059 | softc->action = PROBE_SERIAL_NUM_0; |
| 6060 | |
| 6061 | path->device->flags &= ~CAM_DEV_UNCONFIGURED; |
| 6062 | xpt_reference_device(path->device); |
| 6063 | |
| 6064 | xpt_release_ccb(done_ccb); |
| 6065 | xpt_schedule(periph, priority); |
| 6066 | return; |
| 6067 | } |
| 6068 | default: |
| 6069 | break; |
| 6070 | } |
| 6071 | } else if (cam_periph_error(done_ccb, 0, |
| 6072 | done_ccb->ccb_h.target_lun > 0 |
| 6073 | ? SF_RETRY_UA|SF_QUIET_IR |
| 6074 | : SF_RETRY_UA, |
| 6075 | &softc->saved_ccb) == ERESTART) { |
| 6076 | return; |
| 6077 | } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { |
| 6078 | /* Don't wedge the queue */ |
| 6079 | xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, |
| 6080 | /*run_queue*/TRUE); |
| 6081 | } |
| 6082 | /* |
| 6083 | * If we get to this point, we got an error status back |
| 6084 | * from the inquiry and the error status doesn't require |
| 6085 | * automatically retrying the command. Therefore, the |
| 6086 | * inquiry failed. If we had inquiry information before |
| 6087 | * for this device, but this latest inquiry command failed, |
| 6088 | * the device has probably gone away. If this device isn't |
| 6089 | * already marked unconfigured, notify the peripheral |
| 6090 | * drivers that this device is no more. |
| 6091 | */ |
| 6092 | if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) { |
| 6093 | /* Send the async notification. */ |
| 6094 | xpt_async(AC_LOST_DEVICE, path, NULL); |
| 6095 | } |
| 6096 | |
| 6097 | xpt_release_ccb(done_ccb); |
| 6098 | break; |
| 6099 | } |
| 6100 | case PROBE_MODE_SENSE: |
| 6101 | { |
| 6102 | struct ccb_scsiio *csio; |
| 6103 | struct scsi_mode_header_6 *mode_hdr; |
| 6104 | |
| 6105 | csio = &done_ccb->csio; |
| 6106 | mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr; |
| 6107 | if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) { |
| 6108 | struct scsi_control_page *page; |
| 6109 | u_int8_t *offset; |
| 6110 | |
| 6111 | offset = ((u_int8_t *)&mode_hdr[1]) |
| 6112 | + mode_hdr->blk_desc_len; |
| 6113 | page = (struct scsi_control_page *)offset; |
| 6114 | path->device->queue_flags = page->queue_flags; |
| 6115 | } else if (cam_periph_error(done_ccb, 0, |
| 6116 | SF_RETRY_UA|SF_NO_PRINT, |
| 6117 | &softc->saved_ccb) == ERESTART) { |
| 6118 | return; |
| 6119 | } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { |
| 6120 | /* Don't wedge the queue */ |
| 6121 | xpt_release_devq(done_ccb->ccb_h.path, |
| 6122 | /*count*/1, /*run_queue*/TRUE); |
| 6123 | } |
| 6124 | xpt_release_ccb(done_ccb); |
| 6125 | kfree(mode_hdr, M_CAMXPT); |
| 6126 | softc->action = PROBE_SERIAL_NUM_0; |
| 6127 | xpt_schedule(periph, priority); |
| 6128 | return; |
| 6129 | } |
| 6130 | case PROBE_SERIAL_NUM_0: |
| 6131 | { |
| 6132 | struct ccb_scsiio *csio; |
| 6133 | struct scsi_vpd_supported_page_list *page_list; |
| 6134 | int length, serialnum_supported, i; |
| 6135 | |
| 6136 | serialnum_supported = 0; |
| 6137 | csio = &done_ccb->csio; |
| 6138 | page_list = |
| 6139 | (struct scsi_vpd_supported_page_list *)csio->data_ptr; |
| 6140 | |
| 6141 | if (page_list == NULL) { |
| 6142 | /* |
| 6143 | * Don't process the command as it was never sent |
| 6144 | */ |
| 6145 | } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP |
| 6146 | && (page_list->length > 0)) { |
| 6147 | length = min(page_list->length, |
| 6148 | SVPD_SUPPORTED_PAGES_SIZE); |
| 6149 | for (i = 0; i < length; i++) { |
| 6150 | if (page_list->list[i] == |
| 6151 | SVPD_UNIT_SERIAL_NUMBER) { |
| 6152 | serialnum_supported = 1; |
| 6153 | break; |
| 6154 | } |
| 6155 | } |
| 6156 | } else if (cam_periph_error(done_ccb, 0, |
| 6157 | SF_RETRY_UA|SF_NO_PRINT, |
| 6158 | &softc->saved_ccb) == ERESTART) { |
| 6159 | return; |
| 6160 | } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { |
| 6161 | /* Don't wedge the queue */ |
| 6162 | xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, |
| 6163 | /*run_queue*/TRUE); |
| 6164 | } |
| 6165 | |
| 6166 | if (page_list != NULL) |
| 6167 | kfree(page_list, M_DEVBUF); |
| 6168 | |
| 6169 | if (serialnum_supported) { |
| 6170 | xpt_release_ccb(done_ccb); |
| 6171 | softc->action = PROBE_SERIAL_NUM_1; |
| 6172 | xpt_schedule(periph, priority); |
| 6173 | return; |
| 6174 | } |
| 6175 | xpt_release_ccb(done_ccb); |
| 6176 | softc->action = PROBE_TUR_FOR_NEGOTIATION; |
| 6177 | xpt_schedule(periph, done_ccb->ccb_h.pinfo.priority); |
| 6178 | return; |
| 6179 | } |
| 6180 | |
| 6181 | case PROBE_SERIAL_NUM_1: |
| 6182 | { |
| 6183 | struct ccb_scsiio *csio; |
| 6184 | struct scsi_vpd_unit_serial_number *serial_buf; |
| 6185 | u_int32_t priority; |
| 6186 | int changed; |
| 6187 | int have_serialnum; |
| 6188 | |
| 6189 | changed = 1; |
| 6190 | have_serialnum = 0; |
| 6191 | csio = &done_ccb->csio; |
| 6192 | priority = done_ccb->ccb_h.pinfo.priority; |
| 6193 | serial_buf = |
| 6194 | (struct scsi_vpd_unit_serial_number *)csio->data_ptr; |
| 6195 | |
| 6196 | /* Clean up from previous instance of this device */ |
| 6197 | if (path->device->serial_num != NULL) { |
| 6198 | kfree(path->device->serial_num, M_CAMXPT); |
| 6199 | path->device->serial_num = NULL; |
| 6200 | path->device->serial_num_len = 0; |
| 6201 | } |
| 6202 | |
| 6203 | if (serial_buf == NULL) { |
| 6204 | /* |
| 6205 | * Don't process the command as it was never sent |
| 6206 | */ |
| 6207 | } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP |
| 6208 | && (serial_buf->length > 0)) { |
| 6209 | |
| 6210 | have_serialnum = 1; |
| 6211 | path->device->serial_num = |
| 6212 | kmalloc((serial_buf->length + 1), |
| 6213 | M_CAMXPT, M_INTWAIT); |
| 6214 | bcopy(serial_buf->serial_num, |
| 6215 | path->device->serial_num, |
| 6216 | serial_buf->length); |
| 6217 | path->device->serial_num_len = serial_buf->length; |
| 6218 | path->device->serial_num[serial_buf->length] = '\0'; |
| 6219 | } else if (cam_periph_error(done_ccb, 0, |
| 6220 | SF_RETRY_UA|SF_NO_PRINT, |
| 6221 | &softc->saved_ccb) == ERESTART) { |
| 6222 | return; |
| 6223 | } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { |
| 6224 | /* Don't wedge the queue */ |
| 6225 | xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, |
| 6226 | /*run_queue*/TRUE); |
| 6227 | } |
| 6228 | |
| 6229 | /* |
| 6230 | * Let's see if we have seen this device before. |
| 6231 | */ |
| 6232 | if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) { |
| 6233 | MD5_CTX context; |
| 6234 | u_int8_t digest[16]; |
| 6235 | |
| 6236 | MD5Init(&context); |
| 6237 | |
| 6238 | MD5Update(&context, |
| 6239 | (unsigned char *)&path->device->inq_data, |
| 6240 | sizeof(struct scsi_inquiry_data)); |
| 6241 | |
| 6242 | if (have_serialnum) |
| 6243 | MD5Update(&context, serial_buf->serial_num, |
| 6244 | serial_buf->length); |
| 6245 | |
| 6246 | MD5Final(digest, &context); |
| 6247 | if (bcmp(softc->digest, digest, 16) == 0) |
| 6248 | changed = 0; |
| 6249 | |
| 6250 | /* |
| 6251 | * XXX Do we need to do a TUR in order to ensure |
| 6252 | * that the device really hasn't changed??? |
| 6253 | */ |
| 6254 | if ((changed != 0) |
| 6255 | && ((softc->flags & PROBE_NO_ANNOUNCE) == 0)) |
| 6256 | xpt_async(AC_LOST_DEVICE, path, NULL); |
| 6257 | } |
| 6258 | if (serial_buf != NULL) |
| 6259 | kfree(serial_buf, M_CAMXPT); |
| 6260 | |
| 6261 | if (changed != 0) { |
| 6262 | /* |
| 6263 | * Now that we have all the necessary |
| 6264 | * information to safely perform transfer |
| 6265 | * negotiations... Controllers don't perform |
| 6266 | * any negotiation or tagged queuing until |
| 6267 | * after the first XPT_SET_TRAN_SETTINGS ccb is |
| 6268 | * received. So, on a new device, just retrieve |
| 6269 | * the user settings, and set them as the current |
| 6270 | * settings to set the device up. |
| 6271 | */ |
| 6272 | proberequestdefaultnegotiation(periph); |
| 6273 | xpt_release_ccb(done_ccb); |
| 6274 | |
| 6275 | /* |
| 6276 | * Perform a TUR to allow the controller to |
| 6277 | * perform any necessary transfer negotiation. |
| 6278 | */ |
| 6279 | softc->action = PROBE_TUR_FOR_NEGOTIATION; |
| 6280 | xpt_schedule(periph, priority); |
| 6281 | return; |
| 6282 | } |
| 6283 | xpt_release_ccb(done_ccb); |
| 6284 | break; |
| 6285 | } |
| 6286 | case PROBE_TUR_FOR_NEGOTIATION: |
| 6287 | case PROBE_DV_EXIT: |
| 6288 | if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { |
| 6289 | /* Don't wedge the queue */ |
| 6290 | xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, |
| 6291 | /*run_queue*/TRUE); |
| 6292 | } |
| 6293 | |
| 6294 | xpt_reference_device(path->device); |
| 6295 | /* |
| 6296 | * Do Domain Validation for lun 0 on devices that claim |
| 6297 | * to support Synchronous Transfer modes. |
| 6298 | */ |
| 6299 | if (softc->action == PROBE_TUR_FOR_NEGOTIATION |
| 6300 | && done_ccb->ccb_h.target_lun == 0 |
| 6301 | && (path->device->inq_data.flags & SID_Sync) != 0 |
| 6302 | && (path->device->flags & CAM_DEV_IN_DV) == 0) { |
| 6303 | CAM_DEBUG(periph->path, CAM_DEBUG_INFO, |
| 6304 | ("Begin Domain Validation\n")); |
| 6305 | path->device->flags |= CAM_DEV_IN_DV; |
| 6306 | xpt_release_ccb(done_ccb); |
| 6307 | softc->action = PROBE_INQUIRY_BASIC_DV1; |
| 6308 | xpt_schedule(periph, priority); |
| 6309 | return; |
| 6310 | } |
| 6311 | if (softc->action == PROBE_DV_EXIT) { |
| 6312 | CAM_DEBUG(periph->path, CAM_DEBUG_INFO, |
| 6313 | ("Leave Domain Validation\n")); |
| 6314 | } |
| 6315 | path->device->flags &= |
| 6316 | ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); |
| 6317 | if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { |
| 6318 | /* Inform the XPT that a new device has been found */ |
| 6319 | done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; |
| 6320 | xpt_action(done_ccb); |
| 6321 | xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, |
| 6322 | done_ccb); |
| 6323 | } |
| 6324 | xpt_release_ccb(done_ccb); |
| 6325 | break; |
| 6326 | case PROBE_INQUIRY_BASIC_DV1: |
| 6327 | case PROBE_INQUIRY_BASIC_DV2: |
| 6328 | { |
| 6329 | struct scsi_inquiry_data *nbuf; |
| 6330 | struct ccb_scsiio *csio; |
| 6331 | |
| 6332 | if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) { |
| 6333 | /* Don't wedge the queue */ |
| 6334 | xpt_release_devq(done_ccb->ccb_h.path, /*count*/1, |
| 6335 | /*run_queue*/TRUE); |
| 6336 | } |
| 6337 | csio = &done_ccb->csio; |
| 6338 | nbuf = (struct scsi_inquiry_data *)csio->data_ptr; |
| 6339 | if (bcmp(nbuf, &path->device->inq_data, SHORT_INQUIRY_LENGTH)) { |
| 6340 | xpt_print(path, |
| 6341 | "inquiry data fails comparison at DV%d step\n", |
| 6342 | softc->action == PROBE_INQUIRY_BASIC_DV1 ? 1 : 2); |
| 6343 | if (proberequestbackoff(periph, path->device)) { |
| 6344 | path->device->flags &= ~CAM_DEV_IN_DV; |
| 6345 | softc->action = PROBE_TUR_FOR_NEGOTIATION; |
| 6346 | } else { |
| 6347 | /* give up */ |
| 6348 | softc->action = PROBE_DV_EXIT; |
| 6349 | } |
| 6350 | kfree(nbuf, M_CAMXPT); |
| 6351 | xpt_release_ccb(done_ccb); |
| 6352 | xpt_schedule(periph, priority); |
| 6353 | return; |
| 6354 | } |
| 6355 | kfree(nbuf, M_CAMXPT); |
| 6356 | if (softc->action == PROBE_INQUIRY_BASIC_DV1) { |
| 6357 | softc->action = PROBE_INQUIRY_BASIC_DV2; |
| 6358 | xpt_release_ccb(done_ccb); |
| 6359 | xpt_schedule(periph, priority); |
| 6360 | return; |
| 6361 | } |
| 6362 | if (softc->action == PROBE_DV_EXIT) { |
| 6363 | CAM_DEBUG(periph->path, CAM_DEBUG_INFO, |
| 6364 | ("Leave Domain Validation Successfully\n")); |
| 6365 | } |
| 6366 | path->device->flags &= |
| 6367 | ~(CAM_DEV_UNCONFIGURED|CAM_DEV_IN_DV|CAM_DEV_DV_HIT_BOTTOM); |
| 6368 | if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) { |
| 6369 | /* Inform the XPT that a new device has been found */ |
| 6370 | done_ccb->ccb_h.func_code = XPT_GDEV_TYPE; |
| 6371 | xpt_action(done_ccb); |
| 6372 | xpt_async(AC_FOUND_DEVICE, done_ccb->ccb_h.path, |
| 6373 | done_ccb); |
| 6374 | } |
| 6375 | xpt_release_ccb(done_ccb); |
| 6376 | break; |
| 6377 | } |
| 6378 | } |
| 6379 | done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs); |
| 6380 | TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe); |
| 6381 | done_ccb->ccb_h.status = CAM_REQ_CMP; |
| 6382 | xpt_done(done_ccb); |
| 6383 | if (TAILQ_FIRST(&softc->request_ccbs) == NULL) { |
| 6384 | cam_periph_invalidate(periph); |
| 6385 | cam_periph_release(periph); |
| 6386 | } else { |
| 6387 | probeschedule(periph); |
| 6388 | } |
| 6389 | } |
| 6390 | |
| 6391 | static void |
| 6392 | probecleanup(struct cam_periph *periph) |
| 6393 | { |
| 6394 | kfree(periph->softc, M_CAMXPT); |
| 6395 | } |
| 6396 | |
| 6397 | static void |
| 6398 | xpt_find_quirk(struct cam_ed *device) |
| 6399 | { |
| 6400 | caddr_t match; |
| 6401 | |
| 6402 | match = cam_quirkmatch((caddr_t)&device->inq_data, |
| 6403 | (caddr_t)xpt_quirk_table, |
| 6404 | sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table), |
| 6405 | sizeof(*xpt_quirk_table), scsi_inquiry_match); |
| 6406 | |
| 6407 | if (match == NULL) |
| 6408 | panic("xpt_find_quirk: device didn't match wildcard entry!!"); |
| 6409 | |
| 6410 | device->quirk = (struct xpt_quirk_entry *)match; |
| 6411 | } |
| 6412 | |
| 6413 | static int |
| 6414 | sysctl_cam_search_luns(SYSCTL_HANDLER_ARGS) |
| 6415 | { |
| 6416 | int error, bool; |
| 6417 | |
| 6418 | bool = cam_srch_hi; |
| 6419 | error = sysctl_handle_int(oidp, &bool, 0, req); |
| 6420 | if (error != 0 || req->newptr == NULL) |
| 6421 | return (error); |
| 6422 | if (bool == 0 || bool == 1) { |
| 6423 | cam_srch_hi = bool; |
| 6424 | return (0); |
| 6425 | } else { |
| 6426 | return (EINVAL); |
| 6427 | } |
| 6428 | } |
| 6429 | |
| 6430 | static void |
| 6431 | xpt_devise_transport(struct cam_path *path) |
| 6432 | { |
| 6433 | struct ccb_pathinq cpi; |
| 6434 | struct ccb_trans_settings cts; |
| 6435 | struct scsi_inquiry_data *inq_buf; |
| 6436 | |
| 6437 | /* Get transport information from the SIM */ |
| 6438 | xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1); |
| 6439 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 6440 | xpt_action((union ccb *)&cpi); |
| 6441 | |
| 6442 | inq_buf = NULL; |
| 6443 | if ((path->device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) |
| 6444 | inq_buf = &path->device->inq_data; |
| 6445 | path->device->protocol = PROTO_SCSI; |
| 6446 | path->device->protocol_version = |
| 6447 | inq_buf != NULL ? SID_ANSI_REV(inq_buf) : cpi.protocol_version; |
| 6448 | path->device->transport = cpi.transport; |
| 6449 | path->device->transport_version = cpi.transport_version; |
| 6450 | |
| 6451 | /* |
| 6452 | * Any device not using SPI3 features should |
| 6453 | * be considered SPI2 or lower. |
| 6454 | */ |
| 6455 | if (inq_buf != NULL) { |
| 6456 | if (path->device->transport == XPORT_SPI |
| 6457 | && (inq_buf->spi3data & SID_SPI_MASK) == 0 |
| 6458 | && path->device->transport_version > 2) |
| 6459 | path->device->transport_version = 2; |
| 6460 | } else { |
| 6461 | struct cam_ed* otherdev; |
| 6462 | |
| 6463 | for (otherdev = TAILQ_FIRST(&path->target->ed_entries); |
| 6464 | otherdev != NULL; |
| 6465 | otherdev = TAILQ_NEXT(otherdev, links)) { |
| 6466 | if (otherdev != path->device) |
| 6467 | break; |
| 6468 | } |
| 6469 | |
| 6470 | if (otherdev != NULL) { |
| 6471 | /* |
| 6472 | * Initially assume the same versioning as |
| 6473 | * prior luns for this target. |
| 6474 | */ |
| 6475 | path->device->protocol_version = |
| 6476 | otherdev->protocol_version; |
| 6477 | path->device->transport_version = |
| 6478 | otherdev->transport_version; |
| 6479 | } else { |
| 6480 | /* Until we know better, opt for safty */ |
| 6481 | path->device->protocol_version = 2; |
| 6482 | if (path->device->transport == XPORT_SPI) |
| 6483 | path->device->transport_version = 2; |
| 6484 | else |
| 6485 | path->device->transport_version = 0; |
| 6486 | } |
| 6487 | } |
| 6488 | |
| 6489 | /* |
| 6490 | * XXX |
| 6491 | * For a device compliant with SPC-2 we should be able |
| 6492 | * to determine the transport version supported by |
| 6493 | * scrutinizing the version descriptors in the |
| 6494 | * inquiry buffer. |
| 6495 | */ |
| 6496 | |
| 6497 | /* Tell the controller what we think */ |
| 6498 | xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1); |
| 6499 | cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS; |
| 6500 | cts.type = CTS_TYPE_CURRENT_SETTINGS; |
| 6501 | cts.transport = path->device->transport; |
| 6502 | cts.transport_version = path->device->transport_version; |
| 6503 | cts.protocol = path->device->protocol; |
| 6504 | cts.protocol_version = path->device->protocol_version; |
| 6505 | cts.proto_specific.valid = 0; |
| 6506 | cts.xport_specific.valid = 0; |
| 6507 | xpt_action((union ccb *)&cts); |
| 6508 | } |
| 6509 | |
| 6510 | static void |
| 6511 | xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device, |
| 6512 | int async_update) |
| 6513 | { |
| 6514 | struct ccb_pathinq cpi; |
| 6515 | struct ccb_trans_settings cur_cts; |
| 6516 | struct ccb_trans_settings_scsi *scsi; |
| 6517 | struct ccb_trans_settings_scsi *cur_scsi; |
| 6518 | struct cam_sim *sim; |
| 6519 | struct scsi_inquiry_data *inq_data; |
| 6520 | |
| 6521 | if (device == NULL) { |
| 6522 | cts->ccb_h.status = CAM_PATH_INVALID; |
| 6523 | xpt_done((union ccb *)cts); |
| 6524 | return; |
| 6525 | } |
| 6526 | |
| 6527 | if (cts->protocol == PROTO_UNKNOWN |
| 6528 | || cts->protocol == PROTO_UNSPECIFIED) { |
| 6529 | cts->protocol = device->protocol; |
| 6530 | cts->protocol_version = device->protocol_version; |
| 6531 | } |
| 6532 | |
| 6533 | if (cts->protocol_version == PROTO_VERSION_UNKNOWN |
| 6534 | || cts->protocol_version == PROTO_VERSION_UNSPECIFIED) |
| 6535 | cts->protocol_version = device->protocol_version; |
| 6536 | |
| 6537 | if (cts->protocol != device->protocol) { |
| 6538 | xpt_print(cts->ccb_h.path, "Uninitialized Protocol %x:%x?\n", |
| 6539 | cts->protocol, device->protocol); |
| 6540 | cts->protocol = device->protocol; |
| 6541 | } |
| 6542 | |
| 6543 | if (cts->protocol_version > device->protocol_version) { |
| 6544 | if (bootverbose) { |
| 6545 | xpt_print(cts->ccb_h.path, "Down reving Protocol " |
| 6546 | "Version from %d to %d?\n", cts->protocol_version, |
| 6547 | device->protocol_version); |
| 6548 | } |
| 6549 | cts->protocol_version = device->protocol_version; |
| 6550 | } |
| 6551 | |
| 6552 | if (cts->transport == XPORT_UNKNOWN |
| 6553 | || cts->transport == XPORT_UNSPECIFIED) { |
| 6554 | cts->transport = device->transport; |
| 6555 | cts->transport_version = device->transport_version; |
| 6556 | } |
| 6557 | |
| 6558 | if (cts->transport_version == XPORT_VERSION_UNKNOWN |
| 6559 | || cts->transport_version == XPORT_VERSION_UNSPECIFIED) |
| 6560 | cts->transport_version = device->transport_version; |
| 6561 | |
| 6562 | if (cts->transport != device->transport) { |
| 6563 | xpt_print(cts->ccb_h.path, "Uninitialized Transport %x:%x?\n", |
| 6564 | cts->transport, device->transport); |
| 6565 | cts->transport = device->transport; |
| 6566 | } |
| 6567 | |
| 6568 | if (cts->transport_version > device->transport_version) { |
| 6569 | if (bootverbose) { |
| 6570 | xpt_print(cts->ccb_h.path, "Down reving Transport " |
| 6571 | "Version from %d to %d?\n", cts->transport_version, |
| 6572 | device->transport_version); |
| 6573 | } |
| 6574 | cts->transport_version = device->transport_version; |
| 6575 | } |
| 6576 | |
| 6577 | sim = cts->ccb_h.path->bus->sim; |
| 6578 | |
| 6579 | /* |
| 6580 | * Nothing more of interest to do unless |
| 6581 | * this is a device connected via the |
| 6582 | * SCSI protocol. |
| 6583 | */ |
| 6584 | if (cts->protocol != PROTO_SCSI) { |
| 6585 | if (async_update == FALSE) |
| 6586 | (*(sim->sim_action))(sim, (union ccb *)cts); |
| 6587 | return; |
| 6588 | } |
| 6589 | |
| 6590 | inq_data = &device->inq_data; |
| 6591 | scsi = &cts->proto_specific.scsi; |
| 6592 | xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1); |
| 6593 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 6594 | xpt_action((union ccb *)&cpi); |
| 6595 | |
| 6596 | /* SCSI specific sanity checking */ |
| 6597 | if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0 |
| 6598 | || (INQ_DATA_TQ_ENABLED(inq_data)) == 0 |
| 6599 | || (device->queue_flags & SCP_QUEUE_DQUE) != 0 |
| 6600 | || (device->quirk->mintags == 0)) { |
| 6601 | /* |
| 6602 | * Can't tag on hardware that doesn't support tags, |
| 6603 | * doesn't have it enabled, or has broken tag support. |
| 6604 | */ |
| 6605 | scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; |
| 6606 | } |
| 6607 | |
| 6608 | if (async_update == FALSE) { |
| 6609 | /* |
| 6610 | * Perform sanity checking against what the |
| 6611 | * controller and device can do. |
| 6612 | */ |
| 6613 | xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1); |
| 6614 | cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; |
| 6615 | cur_cts.type = cts->type; |
| 6616 | xpt_action((union ccb *)&cur_cts); |
| 6617 | if ((cur_cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { |
| 6618 | return; |
| 6619 | } |
| 6620 | cur_scsi = &cur_cts.proto_specific.scsi; |
| 6621 | if ((scsi->valid & CTS_SCSI_VALID_TQ) == 0) { |
| 6622 | scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; |
| 6623 | scsi->flags |= cur_scsi->flags & CTS_SCSI_FLAGS_TAG_ENB; |
| 6624 | } |
| 6625 | if ((cur_scsi->valid & CTS_SCSI_VALID_TQ) == 0) |
| 6626 | scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; |
| 6627 | } |
| 6628 | |
| 6629 | /* SPI specific sanity checking */ |
| 6630 | if (cts->transport == XPORT_SPI && async_update == FALSE) { |
| 6631 | u_int spi3caps; |
| 6632 | struct ccb_trans_settings_spi *spi; |
| 6633 | struct ccb_trans_settings_spi *cur_spi; |
| 6634 | |
| 6635 | spi = &cts->xport_specific.spi; |
| 6636 | |
| 6637 | cur_spi = &cur_cts.xport_specific.spi; |
| 6638 | |
| 6639 | /* Fill in any gaps in what the user gave us */ |
| 6640 | if ((spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) |
| 6641 | spi->sync_period = cur_spi->sync_period; |
| 6642 | if ((cur_spi->valid & CTS_SPI_VALID_SYNC_RATE) == 0) |
| 6643 | spi->sync_period = 0; |
| 6644 | if ((spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) |
| 6645 | spi->sync_offset = cur_spi->sync_offset; |
| 6646 | if ((cur_spi->valid & CTS_SPI_VALID_SYNC_OFFSET) == 0) |
| 6647 | spi->sync_offset = 0; |
| 6648 | if ((spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) |
| 6649 | spi->ppr_options = cur_spi->ppr_options; |
| 6650 | if ((cur_spi->valid & CTS_SPI_VALID_PPR_OPTIONS) == 0) |
| 6651 | spi->ppr_options = 0; |
| 6652 | if ((spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) |
| 6653 | spi->bus_width = cur_spi->bus_width; |
| 6654 | if ((cur_spi->valid & CTS_SPI_VALID_BUS_WIDTH) == 0) |
| 6655 | spi->bus_width = 0; |
| 6656 | if ((spi->valid & CTS_SPI_VALID_DISC) == 0) { |
| 6657 | spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; |
| 6658 | spi->flags |= cur_spi->flags & CTS_SPI_FLAGS_DISC_ENB; |
| 6659 | } |
| 6660 | if ((cur_spi->valid & CTS_SPI_VALID_DISC) == 0) |
| 6661 | spi->flags &= ~CTS_SPI_FLAGS_DISC_ENB; |
| 6662 | if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 |
| 6663 | && (inq_data->flags & SID_Sync) == 0 |
| 6664 | && cts->type == CTS_TYPE_CURRENT_SETTINGS) |
| 6665 | || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0) |
| 6666 | || (spi->sync_offset == 0) |
| 6667 | || (spi->sync_period == 0)) { |
| 6668 | /* Force async */ |
| 6669 | spi->sync_period = 0; |
| 6670 | spi->sync_offset = 0; |
| 6671 | } |
| 6672 | |
| 6673 | switch (spi->bus_width) { |
| 6674 | case MSG_EXT_WDTR_BUS_32_BIT: |
| 6675 | if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 |
| 6676 | || (inq_data->flags & SID_WBus32) != 0 |
| 6677 | || cts->type == CTS_TYPE_USER_SETTINGS) |
| 6678 | && (cpi.hba_inquiry & PI_WIDE_32) != 0) |
| 6679 | break; |
| 6680 | /* Fall Through to 16-bit */ |
| 6681 | case MSG_EXT_WDTR_BUS_16_BIT: |
| 6682 | if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0 |
| 6683 | || (inq_data->flags & SID_WBus16) != 0 |
| 6684 | || cts->type == CTS_TYPE_USER_SETTINGS) |
| 6685 | && (cpi.hba_inquiry & PI_WIDE_16) != 0) { |
| 6686 | spi->bus_width = MSG_EXT_WDTR_BUS_16_BIT; |
| 6687 | break; |
| 6688 | } |
| 6689 | /* Fall Through to 8-bit */ |
| 6690 | default: /* New bus width?? */ |
| 6691 | case MSG_EXT_WDTR_BUS_8_BIT: |
| 6692 | /* All targets can do this */ |
| 6693 | spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT; |
| 6694 | break; |
| 6695 | } |
| 6696 | |
| 6697 | spi3caps = cpi.xport_specific.spi.ppr_options; |
| 6698 | if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0 |
| 6699 | && cts->type == CTS_TYPE_CURRENT_SETTINGS) |
| 6700 | spi3caps &= inq_data->spi3data; |
| 6701 | |
| 6702 | if ((spi3caps & SID_SPI_CLOCK_DT) == 0) |
| 6703 | spi->ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
| 6704 | |
| 6705 | if ((spi3caps & SID_SPI_IUS) == 0) |
| 6706 | spi->ppr_options &= ~MSG_EXT_PPR_IU_REQ; |
| 6707 | |
| 6708 | if ((spi3caps & SID_SPI_QAS) == 0) |
| 6709 | spi->ppr_options &= ~MSG_EXT_PPR_QAS_REQ; |
| 6710 | |
| 6711 | /* No SPI Transfer settings are allowed unless we are wide */ |
| 6712 | if (spi->bus_width == 0) |
| 6713 | spi->ppr_options = 0; |
| 6714 | |
| 6715 | if ((spi->flags & CTS_SPI_FLAGS_DISC_ENB) == 0) { |
| 6716 | /* |
| 6717 | * Can't tag queue without disconnection. |
| 6718 | */ |
| 6719 | scsi->flags &= ~CTS_SCSI_FLAGS_TAG_ENB; |
| 6720 | scsi->valid |= CTS_SCSI_VALID_TQ; |
| 6721 | } |
| 6722 | |
| 6723 | /* |
| 6724 | * If we are currently performing tagged transactions to |
| 6725 | * this device and want to change its negotiation parameters, |
| 6726 | * go non-tagged for a bit to give the controller a chance to |
| 6727 | * negotiate unhampered by tag messages. |
| 6728 | */ |
| 6729 | if (cts->type == CTS_TYPE_CURRENT_SETTINGS |
| 6730 | && (device->inq_flags & SID_CmdQue) != 0 |
| 6731 | && (scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 |
| 6732 | && (spi->flags & (CTS_SPI_VALID_SYNC_RATE| |
| 6733 | CTS_SPI_VALID_SYNC_OFFSET| |
| 6734 | CTS_SPI_VALID_BUS_WIDTH)) != 0) |
| 6735 | xpt_toggle_tags(cts->ccb_h.path); |
| 6736 | } |
| 6737 | |
| 6738 | if (cts->type == CTS_TYPE_CURRENT_SETTINGS |
| 6739 | && (scsi->valid & CTS_SCSI_VALID_TQ) != 0) { |
| 6740 | int device_tagenb; |
| 6741 | |
| 6742 | /* |
| 6743 | * If we are transitioning from tags to no-tags or |
| 6744 | * vice-versa, we need to carefully freeze and restart |
| 6745 | * the queue so that we don't overlap tagged and non-tagged |
| 6746 | * commands. We also temporarily stop tags if there is |
| 6747 | * a change in transfer negotiation settings to allow |
| 6748 | * "tag-less" negotiation. |
| 6749 | */ |
| 6750 | if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 |
| 6751 | || (device->inq_flags & SID_CmdQue) != 0) |
| 6752 | device_tagenb = TRUE; |
| 6753 | else |
| 6754 | device_tagenb = FALSE; |
| 6755 | |
| 6756 | if (((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0 |
| 6757 | && device_tagenb == FALSE) |
| 6758 | || ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) == 0 |
| 6759 | && device_tagenb == TRUE)) { |
| 6760 | |
| 6761 | if ((scsi->flags & CTS_SCSI_FLAGS_TAG_ENB) != 0) { |
| 6762 | /* |
| 6763 | * Delay change to use tags until after a |
| 6764 | * few commands have gone to this device so |
| 6765 | * the controller has time to perform transfer |
| 6766 | * negotiations without tagged messages getting |
| 6767 | * in the way. |
| 6768 | */ |
| 6769 | device->tag_delay_count = CAM_TAG_DELAY_COUNT; |
| 6770 | device->flags |= CAM_DEV_TAG_AFTER_COUNT; |
| 6771 | } else { |
| 6772 | struct ccb_relsim crs; |
| 6773 | |
| 6774 | xpt_freeze_devq(cts->ccb_h.path, /*count*/1); |
| 6775 | device->inq_flags &= ~SID_CmdQue; |
| 6776 | xpt_dev_ccbq_resize(cts->ccb_h.path, |
| 6777 | sim->max_dev_openings); |
| 6778 | device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; |
| 6779 | device->tag_delay_count = 0; |
| 6780 | |
| 6781 | xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path, |
| 6782 | /*priority*/1); |
| 6783 | crs.ccb_h.func_code = XPT_REL_SIMQ; |
| 6784 | crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; |
| 6785 | crs.openings |
| 6786 | = crs.release_timeout |
| 6787 | = crs.qfrozen_cnt |
| 6788 | = 0; |
| 6789 | xpt_action((union ccb *)&crs); |
| 6790 | } |
| 6791 | } |
| 6792 | } |
| 6793 | if (async_update == FALSE) |
| 6794 | (*(sim->sim_action))(sim, (union ccb *)cts); |
| 6795 | } |
| 6796 | |
| 6797 | static void |
| 6798 | xpt_toggle_tags(struct cam_path *path) |
| 6799 | { |
| 6800 | struct cam_ed *dev; |
| 6801 | |
| 6802 | /* |
| 6803 | * Give controllers a chance to renegotiate |
| 6804 | * before starting tag operations. We |
| 6805 | * "toggle" tagged queuing off then on |
| 6806 | * which causes the tag enable command delay |
| 6807 | * counter to come into effect. |
| 6808 | */ |
| 6809 | dev = path->device; |
| 6810 | if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 |
| 6811 | || ((dev->inq_flags & SID_CmdQue) != 0 |
| 6812 | && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) { |
| 6813 | struct ccb_trans_settings cts; |
| 6814 | |
| 6815 | xpt_setup_ccb(&cts.ccb_h, path, 1); |
| 6816 | cts.protocol = PROTO_SCSI; |
| 6817 | cts.protocol_version = PROTO_VERSION_UNSPECIFIED; |
| 6818 | cts.transport = XPORT_UNSPECIFIED; |
| 6819 | cts.transport_version = XPORT_VERSION_UNSPECIFIED; |
| 6820 | cts.proto_specific.scsi.flags = 0; |
| 6821 | cts.proto_specific.scsi.valid = CTS_SCSI_VALID_TQ; |
| 6822 | xpt_set_transfer_settings(&cts, path->device, |
| 6823 | /*async_update*/TRUE); |
| 6824 | cts.proto_specific.scsi.flags = CTS_SCSI_FLAGS_TAG_ENB; |
| 6825 | xpt_set_transfer_settings(&cts, path->device, |
| 6826 | /*async_update*/TRUE); |
| 6827 | } |
| 6828 | } |
| 6829 | |
| 6830 | static void |
| 6831 | xpt_start_tags(struct cam_path *path) |
| 6832 | { |
| 6833 | struct ccb_relsim crs; |
| 6834 | struct cam_ed *device; |
| 6835 | struct cam_sim *sim; |
| 6836 | int newopenings; |
| 6837 | |
| 6838 | device = path->device; |
| 6839 | sim = path->bus->sim; |
| 6840 | device->flags &= ~CAM_DEV_TAG_AFTER_COUNT; |
| 6841 | xpt_freeze_devq(path, /*count*/1); |
| 6842 | device->inq_flags |= SID_CmdQue; |
| 6843 | if (device->tag_saved_openings != 0) |
| 6844 | newopenings = device->tag_saved_openings; |
| 6845 | else |
| 6846 | newopenings = min(device->quirk->maxtags, |
| 6847 | sim->max_tagged_dev_openings); |
| 6848 | xpt_dev_ccbq_resize(path, newopenings); |
| 6849 | xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1); |
| 6850 | crs.ccb_h.func_code = XPT_REL_SIMQ; |
| 6851 | crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY; |
| 6852 | crs.openings |
| 6853 | = crs.release_timeout |
| 6854 | = crs.qfrozen_cnt |
| 6855 | = 0; |
| 6856 | xpt_action((union ccb *)&crs); |
| 6857 | } |
| 6858 | |
| 6859 | static int busses_to_config; |
| 6860 | static int busses_to_reset; |
| 6861 | |
| 6862 | static int |
| 6863 | xptconfigbuscountfunc(struct cam_eb *bus, void *arg) |
| 6864 | { |
| 6865 | sim_lock_assert_owned(bus->sim->lock); |
| 6866 | |
| 6867 | if (bus->counted_to_config == 0 && bus->path_id != CAM_XPT_PATH_ID) { |
| 6868 | struct cam_path path; |
| 6869 | struct ccb_pathinq cpi; |
| 6870 | int can_negotiate; |
| 6871 | |
| 6872 | if (bootverbose) { |
| 6873 | kprintf("CAM: Configuring bus:"); |
| 6874 | if (bus->sim) { |
| 6875 | kprintf(" %s%d\n", |
| 6876 | bus->sim->sim_name, |
| 6877 | bus->sim->unit_number); |
| 6878 | } else { |
| 6879 | kprintf(" (unknown)\n"); |
| 6880 | } |
| 6881 | } |
| 6882 | atomic_add_int(&busses_to_config, 1); |
| 6883 | bus->counted_to_config = 1; |
| 6884 | xpt_compile_path(&path, NULL, bus->path_id, |
| 6885 | CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); |
| 6886 | xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1); |
| 6887 | cpi.ccb_h.func_code = XPT_PATH_INQ; |
| 6888 | xpt_action((union ccb *)&cpi); |
| 6889 | can_negotiate = cpi.hba_inquiry; |
| 6890 | can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); |
| 6891 | if ((cpi.hba_misc & PIM_NOBUSRESET) == 0 && can_negotiate) |
| 6892 | busses_to_reset++; |
| 6893 | xpt_release_path(&path); |
| 6894 | } else |
| 6895 | if (bus->counted_to_config == 0 && bus->path_id == CAM_XPT_PATH_ID) { |
| 6896 | /* this is our dummy periph/bus */ |
| 6897 | atomic_add_int(&busses_to_config, 1); |
| 6898 | bus->counted_to_config = 1; |
| 6899 | } |
| 6900 | |
| 6901 | return(1); |
| 6902 | } |
| 6903 | |
| 6904 | static int |
| 6905 | xptconfigfunc(struct cam_eb *bus, void *arg) |
| 6906 | { |
| 6907 | struct cam_path *path; |
| 6908 | union ccb *work_ccb; |
| 6909 | |
| 6910 | sim_lock_assert_owned(bus->sim->lock); |
| 6911 | |
| 6912 | if (bus->path_id != CAM_XPT_PATH_ID) { |
| 6913 | cam_status status; |
| 6914 | int can_negotiate; |
| 6915 | |
| 6916 | work_ccb = xpt_alloc_ccb(); |
| 6917 | if ((status = xpt_create_path(&path, xpt_periph, bus->path_id, |
| 6918 | CAM_TARGET_WILDCARD, |
| 6919 | CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){ |
| 6920 | kprintf("xptconfigfunc: xpt_create_path failed with " |
| 6921 | "status %#x for bus %d\n", status, bus->path_id); |
| 6922 | kprintf("xptconfigfunc: halting bus configuration\n"); |
| 6923 | xpt_free_ccb(work_ccb); |
| 6924 | xpt_uncount_bus(bus); |
| 6925 | return(0); |
| 6926 | } |
| 6927 | xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); |
| 6928 | work_ccb->ccb_h.func_code = XPT_PATH_INQ; |
| 6929 | xpt_action(work_ccb); |
| 6930 | if (work_ccb->ccb_h.status != CAM_REQ_CMP) { |
| 6931 | kprintf("xptconfigfunc: CPI failed on bus %d " |
| 6932 | "with status %d\n", bus->path_id, |
| 6933 | work_ccb->ccb_h.status); |
| 6934 | xpt_finishconfig(xpt_periph, work_ccb); |
| 6935 | return(1); |
| 6936 | } |
| 6937 | |
| 6938 | can_negotiate = work_ccb->cpi.hba_inquiry; |
| 6939 | can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE); |
| 6940 | if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0 |
| 6941 | && (can_negotiate != 0)) { |
| 6942 | xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1); |
| 6943 | work_ccb->ccb_h.func_code = XPT_RESET_BUS; |
| 6944 | work_ccb->ccb_h.cbfcnp = NULL; |
| 6945 | CAM_DEBUG(path, CAM_DEBUG_SUBTRACE, |
| 6946 | ("Resetting Bus\n")); |
| 6947 | xpt_action(work_ccb); |
| 6948 | xpt_finishconfig(xpt_periph, work_ccb); |
| 6949 | } else { |
| 6950 | /* Act as though we performed a successful BUS RESET */ |
| 6951 | work_ccb->ccb_h.func_code = XPT_RESET_BUS; |
| 6952 | xpt_finishconfig(xpt_periph, work_ccb); |
| 6953 | } |
| 6954 | } else { |
| 6955 | xpt_uncount_bus(bus); |
| 6956 | } |
| 6957 | |
| 6958 | return(1); |
| 6959 | } |
| 6960 | |
| 6961 | /* |
| 6962 | * Now that interrupts are enabled, go find our devices. |
| 6963 | * |
| 6964 | * This hook function is called once by run_interrupt_driven_config_hooks(). |
| 6965 | * XPT is expected to disestablish its hook when done. |
| 6966 | */ |
| 6967 | static void |
| 6968 | xpt_config(void *arg) |
| 6969 | { |
| 6970 | |
| 6971 | #ifdef CAMDEBUG |
| 6972 | /* Setup debugging flags and path */ |
| 6973 | #ifdef CAM_DEBUG_FLAGS |
| 6974 | cam_dflags = CAM_DEBUG_FLAGS; |
| 6975 | #else /* !CAM_DEBUG_FLAGS */ |
| 6976 | cam_dflags = CAM_DEBUG_NONE; |
| 6977 | #endif /* CAM_DEBUG_FLAGS */ |
| 6978 | #ifdef CAM_DEBUG_BUS |
| 6979 | if (cam_dflags != CAM_DEBUG_NONE) { |
| 6980 | /* |
| 6981 | * Locking is specifically omitted here. No SIMs have |
| 6982 | * registered yet, so xpt_create_path will only be searching |
| 6983 | * empty lists of targets and devices. |
| 6984 | */ |
| 6985 | if (xpt_create_path(&cam_dpath, xpt_periph, |
| 6986 | CAM_DEBUG_BUS, CAM_DEBUG_TARGET, |
| 6987 | CAM_DEBUG_LUN) != CAM_REQ_CMP) { |
| 6988 | kprintf("xpt_config: xpt_create_path() failed for debug" |
| 6989 | " target %d:%d:%d, debugging disabled\n", |
| 6990 | CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN); |
| 6991 | cam_dflags = CAM_DEBUG_NONE; |
| 6992 | } |
| 6993 | } else { |
| 6994 | cam_dpath = NULL; |
| 6995 | } |
| 6996 | #else /* !CAM_DEBUG_BUS */ |
| 6997 | cam_dpath = NULL; |
| 6998 | #endif /* CAM_DEBUG_BUS */ |
| 6999 | #endif /* CAMDEBUG */ |
| 7000 | |
| 7001 | /* |
| 7002 | * Scan all installed busses. This will also add a count |
| 7003 | * for our dummy placeholder (xpt_periph). |
| 7004 | */ |
| 7005 | xpt_for_all_busses(xptconfigbuscountfunc, NULL); |
| 7006 | |
| 7007 | kprintf("CAM: Configuring %d busses\n", busses_to_config - 1); |
| 7008 | if (busses_to_reset > 0 && scsi_delay >= 2000) { |
| 7009 | kprintf("Waiting %d seconds for SCSI " |
| 7010 | "devices to settle\n", |
| 7011 | scsi_delay/1000); |
| 7012 | } |
| 7013 | xpt_for_all_busses(xptconfigfunc, NULL); |
| 7014 | } |
| 7015 | |
| 7016 | /* |
| 7017 | * If the given device only has one peripheral attached to it, and if that |
| 7018 | * peripheral is the passthrough driver, announce it. This insures that the |
| 7019 | * user sees some sort of announcement for every peripheral in their system. |
| 7020 | */ |
| 7021 | static int |
| 7022 | xptpassannouncefunc(struct cam_ed *device, void *arg) |
| 7023 | { |
| 7024 | struct cam_periph *periph; |
| 7025 | int i; |
| 7026 | |
| 7027 | for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL; |
| 7028 | periph = SLIST_NEXT(periph, periph_links), i++); |
| 7029 | |
| 7030 | periph = SLIST_FIRST(&device->periphs); |
| 7031 | if ((i == 1) |
| 7032 | && (strncmp(periph->periph_name, "pass", 4) == 0)) |
| 7033 | xpt_announce_periph(periph, NULL); |
| 7034 | |
| 7035 | return(1); |
| 7036 | } |
| 7037 | |
| 7038 | static void |
| 7039 | xpt_finishconfig_task(void *context, int pending) |
| 7040 | { |
| 7041 | struct periph_driver **p_drv; |
| 7042 | int i; |
| 7043 | |
| 7044 | kprintf("CAM: finished configuring all busses\n"); |
| 7045 | |
| 7046 | if (busses_to_config == 0) { |
| 7047 | /* Register all the peripheral drivers */ |
| 7048 | /* XXX This will have to change when we have loadable modules */ |
| 7049 | p_drv = periph_drivers; |
| 7050 | for (i = 0; p_drv[i] != NULL; i++) { |
| 7051 | (*p_drv[i]->init)(); |
| 7052 | } |
| 7053 | |
| 7054 | /* |
| 7055 | * Check for devices with no "standard" peripheral driver |
| 7056 | * attached. For any devices like that, announce the |
| 7057 | * passthrough driver so the user will see something. |
| 7058 | */ |
| 7059 | xpt_for_all_devices(xptpassannouncefunc, NULL); |
| 7060 | |
| 7061 | /* Release our hook so that the boot can continue. */ |
| 7062 | config_intrhook_disestablish(xsoftc.xpt_config_hook); |
| 7063 | kfree(xsoftc.xpt_config_hook, M_CAMXPT); |
| 7064 | xsoftc.xpt_config_hook = NULL; |
| 7065 | } |
| 7066 | kfree(context, M_CAMXPT); |
| 7067 | } |
| 7068 | |
| 7069 | static void |
| 7070 | xpt_uncount_bus (struct cam_eb *bus) |
| 7071 | { |
| 7072 | struct xpt_task *task; |
| 7073 | |
| 7074 | if (bus->counted_to_config) { |
| 7075 | bus->counted_to_config = 0; |
| 7076 | if (atomic_fetchadd_int(&busses_to_config, -1) == 1) { |
| 7077 | task = kmalloc(sizeof(struct xpt_task), M_CAMXPT, |
| 7078 | M_INTWAIT | M_ZERO); |
| 7079 | TASK_INIT(&task->task, 0, xpt_finishconfig_task, task); |
| 7080 | taskqueue_enqueue(taskqueue_thread[mycpuid], |
| 7081 | &task->task); |
| 7082 | } |
| 7083 | } |
| 7084 | } |
| 7085 | |
| 7086 | static void |
| 7087 | xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb) |
| 7088 | { |
| 7089 | struct cam_path *path; |
| 7090 | |
| 7091 | path = done_ccb->ccb_h.path; |
| 7092 | CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_finishconfig\n")); |
| 7093 | |
| 7094 | switch(done_ccb->ccb_h.func_code) { |
| 7095 | case XPT_RESET_BUS: |
| 7096 | if (done_ccb->ccb_h.status == CAM_REQ_CMP) { |
| 7097 | done_ccb->ccb_h.func_code = XPT_SCAN_BUS; |
| 7098 | done_ccb->ccb_h.cbfcnp = xpt_finishconfig; |
| 7099 | done_ccb->crcn.flags = 0; |
| 7100 | xpt_action(done_ccb); |
| 7101 | return; |
| 7102 | } |
| 7103 | /* FALLTHROUGH */ |
| 7104 | case XPT_SCAN_BUS: |
| 7105 | default: |
| 7106 | if (bootverbose) { |
| 7107 | kprintf("CAM: Finished configuring bus:"); |
| 7108 | if (path->bus->sim) { |
| 7109 | kprintf(" %s%d\n", |
| 7110 | path->bus->sim->sim_name, |
| 7111 | path->bus->sim->unit_number); |
| 7112 | } else { |
| 7113 | kprintf(" (unknown)\n"); |
| 7114 | } |
| 7115 | } |
| 7116 | xpt_uncount_bus(path->bus); |
| 7117 | xpt_free_path(path); |
| 7118 | xpt_free_ccb(done_ccb); |
| 7119 | break; |
| 7120 | } |
| 7121 | } |
| 7122 | |
| 7123 | cam_status |
| 7124 | xpt_register_async(int event, ac_callback_t *cbfunc, void *cbarg, |
| 7125 | struct cam_path *path) |
| 7126 | { |
| 7127 | struct ccb_setasync csa; |
| 7128 | cam_status status; |
| 7129 | int xptpath = 0; |
| 7130 | |
| 7131 | if (path == NULL) { |
| 7132 | lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); |
| 7133 | status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, |
| 7134 | CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); |
| 7135 | if (status != CAM_REQ_CMP) { |
| 7136 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 7137 | return (status); |
| 7138 | } |
| 7139 | xptpath = 1; |
| 7140 | } |
| 7141 | |
| 7142 | xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); |
| 7143 | csa.ccb_h.func_code = XPT_SASYNC_CB; |
| 7144 | csa.event_enable = event; |
| 7145 | csa.callback = cbfunc; |
| 7146 | csa.callback_arg = cbarg; |
| 7147 | xpt_action((union ccb *)&csa); |
| 7148 | status = csa.ccb_h.status; |
| 7149 | if (xptpath) { |
| 7150 | xpt_free_path(path); |
| 7151 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 7152 | } |
| 7153 | return (status); |
| 7154 | } |
| 7155 | |
| 7156 | static void |
| 7157 | xptaction(struct cam_sim *sim, union ccb *work_ccb) |
| 7158 | { |
| 7159 | CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n")); |
| 7160 | |
| 7161 | switch (work_ccb->ccb_h.func_code) { |
| 7162 | /* Common cases first */ |
| 7163 | case XPT_PATH_INQ: /* Path routing inquiry */ |
| 7164 | { |
| 7165 | struct ccb_pathinq *cpi; |
| 7166 | |
| 7167 | cpi = &work_ccb->cpi; |
| 7168 | cpi->version_num = 1; /* XXX??? */ |
| 7169 | cpi->hba_inquiry = 0; |
| 7170 | cpi->target_sprt = 0; |
| 7171 | cpi->hba_misc = 0; |
| 7172 | cpi->hba_eng_cnt = 0; |
| 7173 | cpi->max_target = 0; |
| 7174 | cpi->max_lun = 0; |
| 7175 | cpi->initiator_id = 0; |
| 7176 | strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); |
| 7177 | strncpy(cpi->hba_vid, "", HBA_IDLEN); |
| 7178 | strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN); |
| 7179 | cpi->unit_number = sim->unit_number; |
| 7180 | cpi->bus_id = sim->bus_id; |
| 7181 | cpi->base_transfer_speed = 0; |
| 7182 | cpi->protocol = PROTO_UNSPECIFIED; |
| 7183 | cpi->protocol_version = PROTO_VERSION_UNSPECIFIED; |
| 7184 | cpi->transport = XPORT_UNSPECIFIED; |
| 7185 | cpi->transport_version = XPORT_VERSION_UNSPECIFIED; |
| 7186 | cpi->ccb_h.status = CAM_REQ_CMP; |
| 7187 | xpt_done(work_ccb); |
| 7188 | break; |
| 7189 | } |
| 7190 | default: |
| 7191 | work_ccb->ccb_h.status = CAM_REQ_INVALID; |
| 7192 | xpt_done(work_ccb); |
| 7193 | break; |
| 7194 | } |
| 7195 | } |
| 7196 | |
| 7197 | /* |
| 7198 | * The xpt as a "controller" has no interrupt sources, so polling |
| 7199 | * is a no-op. |
| 7200 | */ |
| 7201 | static void |
| 7202 | xptpoll(struct cam_sim *sim) |
| 7203 | { |
| 7204 | } |
| 7205 | |
| 7206 | void |
| 7207 | xpt_lock_buses(void) |
| 7208 | { |
| 7209 | lockmgr(&xsoftc.xpt_topo_lock, LK_EXCLUSIVE); |
| 7210 | } |
| 7211 | |
| 7212 | void |
| 7213 | xpt_unlock_buses(void) |
| 7214 | { |
| 7215 | lockmgr(&xsoftc.xpt_topo_lock, LK_RELEASE); |
| 7216 | } |
| 7217 | |
| 7218 | |
| 7219 | /* |
| 7220 | * Should only be called by the machine interrupt dispatch routines, |
| 7221 | * so put these prototypes here instead of in the header. |
| 7222 | */ |
| 7223 | |
| 7224 | static void |
| 7225 | swi_cambio(void *arg, void *frame) |
| 7226 | { |
| 7227 | camisr(NULL); |
| 7228 | } |
| 7229 | |
| 7230 | static void |
| 7231 | camisr(void *dummy) |
| 7232 | { |
| 7233 | cam_simq_t queue; |
| 7234 | struct cam_sim *sim; |
| 7235 | |
| 7236 | spin_lock(&cam_simq_spin); |
| 7237 | TAILQ_INIT(&queue); |
| 7238 | TAILQ_CONCAT(&queue, &cam_simq, links); |
| 7239 | spin_unlock(&cam_simq_spin); |
| 7240 | |
| 7241 | while ((sim = TAILQ_FIRST(&queue)) != NULL) { |
| 7242 | TAILQ_REMOVE(&queue, sim, links); |
| 7243 | CAM_SIM_LOCK(sim); |
| 7244 | sim->flags &= ~CAM_SIM_ON_DONEQ; |
| 7245 | camisr_runqueue(sim); |
| 7246 | CAM_SIM_UNLOCK(sim); |
| 7247 | } |
| 7248 | } |
| 7249 | |
| 7250 | static void |
| 7251 | camisr_runqueue(struct cam_sim *sim) |
| 7252 | { |
| 7253 | struct ccb_hdr *ccb_h; |
| 7254 | int runq; |
| 7255 | |
| 7256 | spin_lock(&sim->sim_spin); |
| 7257 | while ((ccb_h = TAILQ_FIRST(&sim->sim_doneq)) != NULL) { |
| 7258 | TAILQ_REMOVE(&sim->sim_doneq, ccb_h, sim_links.tqe); |
| 7259 | spin_unlock(&sim->sim_spin); |
| 7260 | ccb_h->pinfo.index = CAM_UNQUEUED_INDEX; |
| 7261 | |
| 7262 | CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE, |
| 7263 | ("camisr\n")); |
| 7264 | |
| 7265 | runq = FALSE; |
| 7266 | |
| 7267 | if (ccb_h->flags & CAM_HIGH_POWER) { |
| 7268 | struct highpowerlist *hphead; |
| 7269 | struct cam_ed *device; |
| 7270 | union ccb *send_ccb; |
| 7271 | |
| 7272 | lockmgr(&xsoftc.xpt_lock, LK_EXCLUSIVE); |
| 7273 | hphead = &xsoftc.highpowerq; |
| 7274 | |
| 7275 | send_ccb = (union ccb *)STAILQ_FIRST(hphead); |
| 7276 | |
| 7277 | /* |
| 7278 | * Increment the count since this command is done. |
| 7279 | */ |
| 7280 | xsoftc.num_highpower++; |
| 7281 | |
| 7282 | /* |
| 7283 | * Any high powered commands queued up? |
| 7284 | */ |
| 7285 | if (send_ccb != NULL) { |
| 7286 | device = send_ccb->ccb_h.path->device; |
| 7287 | |
| 7288 | STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe); |
| 7289 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 7290 | |
| 7291 | xpt_release_devq(send_ccb->ccb_h.path, |
| 7292 | /*count*/1, /*runqueue*/TRUE); |
| 7293 | } else |
| 7294 | lockmgr(&xsoftc.xpt_lock, LK_RELEASE); |
| 7295 | } |
| 7296 | |
| 7297 | if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) { |
| 7298 | struct cam_ed *dev; |
| 7299 | |
| 7300 | dev = ccb_h->path->device; |
| 7301 | |
| 7302 | cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h); |
| 7303 | |
| 7304 | /* |
| 7305 | * devq may be NULL if this is cam_dead_sim |
| 7306 | */ |
| 7307 | if (ccb_h->path->bus->sim->devq) { |
| 7308 | ccb_h->path->bus->sim->devq->send_active--; |
| 7309 | ccb_h->path->bus->sim->devq->send_openings++; |
| 7310 | } |
| 7311 | |
| 7312 | if (((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0 |
| 7313 | && (ccb_h->status&CAM_STATUS_MASK) != CAM_REQUEUE_REQ) |
| 7314 | || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0 |
| 7315 | && (dev->ccbq.dev_active == 0))) { |
| 7316 | |
| 7317 | xpt_release_devq(ccb_h->path, /*count*/1, |
| 7318 | /*run_queue*/TRUE); |
| 7319 | } |
| 7320 | |
| 7321 | if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0 |
| 7322 | && (--dev->tag_delay_count == 0)) |
| 7323 | xpt_start_tags(ccb_h->path); |
| 7324 | |
| 7325 | if ((dev->ccbq.queue.entries > 0) |
| 7326 | && (dev->qfrozen_cnt == 0) |
| 7327 | && (device_is_send_queued(dev) == 0)) { |
| 7328 | runq = xpt_schedule_dev_sendq(ccb_h->path->bus, |
| 7329 | dev); |
| 7330 | } |
| 7331 | } |
| 7332 | |
| 7333 | if (ccb_h->status & CAM_RELEASE_SIMQ) { |
| 7334 | xpt_release_simq(ccb_h->path->bus->sim, |
| 7335 | /*run_queue*/TRUE); |
| 7336 | ccb_h->status &= ~CAM_RELEASE_SIMQ; |
| 7337 | runq = FALSE; |
| 7338 | } |
| 7339 | |
| 7340 | if ((ccb_h->flags & CAM_DEV_QFRZDIS) |
| 7341 | && (ccb_h->status & CAM_DEV_QFRZN)) { |
| 7342 | xpt_release_devq(ccb_h->path, /*count*/1, |
| 7343 | /*run_queue*/TRUE); |
| 7344 | ccb_h->status &= ~CAM_DEV_QFRZN; |
| 7345 | } else if (runq) { |
| 7346 | xpt_run_dev_sendq(ccb_h->path->bus); |
| 7347 | } |
| 7348 | |
| 7349 | /* Call the peripheral driver's callback */ |
| 7350 | (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h); |
| 7351 | spin_lock(&sim->sim_spin); |
| 7352 | } |
| 7353 | spin_unlock(&sim->sim_spin); |
| 7354 | } |
| 7355 | |
| 7356 | /* |
| 7357 | * The dead_sim isn't completely hooked into CAM, we have to make sure |
| 7358 | * the doneq is cleared after calling xpt_done() so cam_periph_ccbwait() |
| 7359 | * doesn't block. |
| 7360 | */ |
| 7361 | static void |
| 7362 | dead_sim_action(struct cam_sim *sim, union ccb *ccb) |
| 7363 | { |
| 7364 | |
| 7365 | ccb->ccb_h.status = CAM_DEV_NOT_THERE; |
| 7366 | xpt_done(ccb); |
| 7367 | camisr_runqueue(sim); |
| 7368 | } |
| 7369 | |
| 7370 | static void |
| 7371 | dead_sim_poll(struct cam_sim *sim) |
| 7372 | { |
| 7373 | } |