| 1 | /* $NetBSD: scsipi_base.c,v 1.168 2016/11/21 21:03:22 mlelstv Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1998, 1999, 2000, 2002, 2003, 2004 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Charles M. Hannum; by Jason R. Thorpe of the Numerical Aerospace |
| 9 | * Simulation Facility, NASA Ames Research Center. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <sys/cdefs.h> |
| 34 | __KERNEL_RCSID(0, "$NetBSD: scsipi_base.c,v 1.168 2016/11/21 21:03:22 mlelstv Exp $" ); |
| 35 | |
| 36 | #ifdef _KERNEL_OPT |
| 37 | #include "opt_scsi.h" |
| 38 | #endif |
| 39 | |
| 40 | #include <sys/param.h> |
| 41 | #include <sys/systm.h> |
| 42 | #include <sys/kernel.h> |
| 43 | #include <sys/buf.h> |
| 44 | #include <sys/uio.h> |
| 45 | #include <sys/malloc.h> |
| 46 | #include <sys/pool.h> |
| 47 | #include <sys/errno.h> |
| 48 | #include <sys/device.h> |
| 49 | #include <sys/proc.h> |
| 50 | #include <sys/kthread.h> |
| 51 | #include <sys/hash.h> |
| 52 | #include <sys/atomic.h> |
| 53 | |
| 54 | #include <dev/scsipi/scsi_spc.h> |
| 55 | #include <dev/scsipi/scsipi_all.h> |
| 56 | #include <dev/scsipi/scsipi_disk.h> |
| 57 | #include <dev/scsipi/scsipiconf.h> |
| 58 | #include <dev/scsipi/scsipi_base.h> |
| 59 | |
| 60 | #include <dev/scsipi/scsi_all.h> |
| 61 | #include <dev/scsipi/scsi_message.h> |
| 62 | |
| 63 | #include <machine/param.h> |
| 64 | |
| 65 | static int scsipi_complete(struct scsipi_xfer *); |
| 66 | static void scsipi_request_sense(struct scsipi_xfer *); |
| 67 | static int scsipi_enqueue(struct scsipi_xfer *); |
| 68 | static void scsipi_run_queue(struct scsipi_channel *chan); |
| 69 | |
| 70 | static void scsipi_completion_thread(void *); |
| 71 | |
| 72 | static void scsipi_get_tag(struct scsipi_xfer *); |
| 73 | static void scsipi_put_tag(struct scsipi_xfer *); |
| 74 | |
| 75 | static int scsipi_get_resource(struct scsipi_channel *); |
| 76 | static void scsipi_put_resource(struct scsipi_channel *); |
| 77 | |
| 78 | static void scsipi_async_event_max_openings(struct scsipi_channel *, |
| 79 | struct scsipi_max_openings *); |
| 80 | static void scsipi_async_event_channel_reset(struct scsipi_channel *); |
| 81 | |
| 82 | static void scsipi_channel_freeze_locked(struct scsipi_channel *, int); |
| 83 | |
| 84 | static void scsipi_adapter_lock(struct scsipi_adapter *adapt); |
| 85 | static void scsipi_adapter_unlock(struct scsipi_adapter *adapt); |
| 86 | |
| 87 | static struct pool scsipi_xfer_pool; |
| 88 | |
| 89 | int scsipi_xs_count = 0; |
| 90 | |
| 91 | /* |
| 92 | * scsipi_init: |
| 93 | * |
| 94 | * Called when a scsibus or atapibus is attached to the system |
| 95 | * to initialize shared data structures. |
| 96 | */ |
| 97 | void |
| 98 | scsipi_init(void) |
| 99 | { |
| 100 | static int scsipi_init_done; |
| 101 | |
| 102 | if (scsipi_init_done) |
| 103 | return; |
| 104 | scsipi_init_done = 1; |
| 105 | |
| 106 | /* Initialize the scsipi_xfer pool. */ |
| 107 | pool_init(&scsipi_xfer_pool, sizeof(struct scsipi_xfer), 0, |
| 108 | 0, 0, "scxspl" , NULL, IPL_BIO); |
| 109 | if (pool_prime(&scsipi_xfer_pool, |
| 110 | PAGE_SIZE / sizeof(struct scsipi_xfer)) == ENOMEM) { |
| 111 | printf("WARNING: not enough memory for scsipi_xfer_pool\n" ); |
| 112 | } |
| 113 | |
| 114 | scsipi_ioctl_init(); |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * scsipi_channel_init: |
| 119 | * |
| 120 | * Initialize a scsipi_channel when it is attached. |
| 121 | */ |
| 122 | int |
| 123 | scsipi_channel_init(struct scsipi_channel *chan) |
| 124 | { |
| 125 | struct scsipi_adapter *adapt = chan->chan_adapter; |
| 126 | int i; |
| 127 | |
| 128 | /* Initialize shared data. */ |
| 129 | scsipi_init(); |
| 130 | |
| 131 | /* Initialize the queues. */ |
| 132 | TAILQ_INIT(&chan->chan_queue); |
| 133 | TAILQ_INIT(&chan->chan_complete); |
| 134 | |
| 135 | for (i = 0; i < SCSIPI_CHAN_PERIPH_BUCKETS; i++) |
| 136 | LIST_INIT(&chan->chan_periphtab[i]); |
| 137 | |
| 138 | /* |
| 139 | * Create the asynchronous completion thread. |
| 140 | */ |
| 141 | if (kthread_create(PRI_NONE, 0, NULL, scsipi_completion_thread, chan, |
| 142 | &chan->chan_thread, "%s" , chan->chan_name)) { |
| 143 | aprint_error_dev(adapt->adapt_dev, "unable to create completion thread for " |
| 144 | "channel %d\n" , chan->chan_channel); |
| 145 | panic("scsipi_channel_init" ); |
| 146 | } |
| 147 | |
| 148 | return (0); |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * scsipi_channel_shutdown: |
| 153 | * |
| 154 | * Shutdown a scsipi_channel. |
| 155 | */ |
| 156 | void |
| 157 | scsipi_channel_shutdown(struct scsipi_channel *chan) |
| 158 | { |
| 159 | |
| 160 | mutex_enter(chan_mtx(chan)); |
| 161 | /* |
| 162 | * Shut down the completion thread. |
| 163 | */ |
| 164 | chan->chan_tflags |= SCSIPI_CHANT_SHUTDOWN; |
| 165 | cv_broadcast(chan_cv_complete(chan)); |
| 166 | |
| 167 | /* |
| 168 | * Now wait for the thread to exit. |
| 169 | */ |
| 170 | while (chan->chan_thread != NULL) |
| 171 | cv_wait(chan_cv_thread(chan), chan_mtx(chan)); |
| 172 | mutex_exit(chan_mtx(chan)); |
| 173 | } |
| 174 | |
| 175 | static uint32_t |
| 176 | scsipi_chan_periph_hash(uint64_t t, uint64_t l) |
| 177 | { |
| 178 | uint32_t hash; |
| 179 | |
| 180 | hash = hash32_buf(&t, sizeof(t), HASH32_BUF_INIT); |
| 181 | hash = hash32_buf(&l, sizeof(l), hash); |
| 182 | |
| 183 | return (hash & SCSIPI_CHAN_PERIPH_HASHMASK); |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * scsipi_insert_periph: |
| 188 | * |
| 189 | * Insert a periph into the channel. |
| 190 | */ |
| 191 | void |
| 192 | scsipi_insert_periph(struct scsipi_channel *chan, struct scsipi_periph *periph) |
| 193 | { |
| 194 | uint32_t hash; |
| 195 | |
| 196 | hash = scsipi_chan_periph_hash(periph->periph_target, |
| 197 | periph->periph_lun); |
| 198 | |
| 199 | mutex_enter(chan_mtx(chan)); |
| 200 | LIST_INSERT_HEAD(&chan->chan_periphtab[hash], periph, periph_hash); |
| 201 | mutex_exit(chan_mtx(chan)); |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * scsipi_remove_periph: |
| 206 | * |
| 207 | * Remove a periph from the channel. |
| 208 | */ |
| 209 | void |
| 210 | scsipi_remove_periph(struct scsipi_channel *chan, |
| 211 | struct scsipi_periph *periph) |
| 212 | { |
| 213 | |
| 214 | LIST_REMOVE(periph, periph_hash); |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * scsipi_lookup_periph: |
| 219 | * |
| 220 | * Lookup a periph on the specified channel. |
| 221 | */ |
| 222 | static struct scsipi_periph * |
| 223 | scsipi_lookup_periph_internal(struct scsipi_channel *chan, int target, int lun, bool lock) |
| 224 | { |
| 225 | struct scsipi_periph *periph; |
| 226 | uint32_t hash; |
| 227 | |
| 228 | if (target >= chan->chan_ntargets || |
| 229 | lun >= chan->chan_nluns) |
| 230 | return (NULL); |
| 231 | |
| 232 | hash = scsipi_chan_periph_hash(target, lun); |
| 233 | |
| 234 | if (lock) |
| 235 | mutex_enter(chan_mtx(chan)); |
| 236 | LIST_FOREACH(periph, &chan->chan_periphtab[hash], periph_hash) { |
| 237 | if (periph->periph_target == target && |
| 238 | periph->periph_lun == lun) |
| 239 | break; |
| 240 | } |
| 241 | if (lock) |
| 242 | mutex_exit(chan_mtx(chan)); |
| 243 | |
| 244 | return (periph); |
| 245 | } |
| 246 | |
| 247 | struct scsipi_periph * |
| 248 | scsipi_lookup_periph_locked(struct scsipi_channel *chan, int target, int lun) |
| 249 | { |
| 250 | return scsipi_lookup_periph_internal(chan, target, lun, false); |
| 251 | } |
| 252 | |
| 253 | struct scsipi_periph * |
| 254 | scsipi_lookup_periph(struct scsipi_channel *chan, int target, int lun) |
| 255 | { |
| 256 | return scsipi_lookup_periph_internal(chan, target, lun, true); |
| 257 | } |
| 258 | |
| 259 | /* |
| 260 | * scsipi_get_resource: |
| 261 | * |
| 262 | * Allocate a single xfer `resource' from the channel. |
| 263 | * |
| 264 | * NOTE: Must be called with channel lock held |
| 265 | */ |
| 266 | static int |
| 267 | scsipi_get_resource(struct scsipi_channel *chan) |
| 268 | { |
| 269 | struct scsipi_adapter *adapt = chan->chan_adapter; |
| 270 | |
| 271 | if (chan->chan_flags & SCSIPI_CHAN_OPENINGS) { |
| 272 | if (chan->chan_openings > 0) { |
| 273 | chan->chan_openings--; |
| 274 | return (1); |
| 275 | } |
| 276 | return (0); |
| 277 | } |
| 278 | |
| 279 | if (adapt->adapt_openings > 0) { |
| 280 | adapt->adapt_openings--; |
| 281 | return (1); |
| 282 | } |
| 283 | return (0); |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | * scsipi_grow_resources: |
| 288 | * |
| 289 | * Attempt to grow resources for a channel. If this succeeds, |
| 290 | * we allocate one for our caller. |
| 291 | * |
| 292 | * NOTE: Must be called with channel lock held |
| 293 | */ |
| 294 | static inline int |
| 295 | scsipi_grow_resources(struct scsipi_channel *chan) |
| 296 | { |
| 297 | |
| 298 | if (chan->chan_flags & SCSIPI_CHAN_CANGROW) { |
| 299 | if ((chan->chan_flags & SCSIPI_CHAN_TACTIVE) == 0) { |
| 300 | mutex_exit(chan_mtx(chan)); |
| 301 | scsipi_adapter_request(chan, |
| 302 | ADAPTER_REQ_GROW_RESOURCES, NULL); |
| 303 | mutex_enter(chan_mtx(chan)); |
| 304 | return (scsipi_get_resource(chan)); |
| 305 | } |
| 306 | /* |
| 307 | * ask the channel thread to do it. It'll have to thaw the |
| 308 | * queue |
| 309 | */ |
| 310 | scsipi_channel_freeze_locked(chan, 1); |
| 311 | chan->chan_tflags |= SCSIPI_CHANT_GROWRES; |
| 312 | cv_broadcast(chan_cv_complete(chan)); |
| 313 | return (0); |
| 314 | } |
| 315 | |
| 316 | return (0); |
| 317 | } |
| 318 | |
| 319 | /* |
| 320 | * scsipi_put_resource: |
| 321 | * |
| 322 | * Free a single xfer `resource' to the channel. |
| 323 | * |
| 324 | * NOTE: Must be called with channel lock held |
| 325 | */ |
| 326 | static void |
| 327 | scsipi_put_resource(struct scsipi_channel *chan) |
| 328 | { |
| 329 | struct scsipi_adapter *adapt = chan->chan_adapter; |
| 330 | |
| 331 | if (chan->chan_flags & SCSIPI_CHAN_OPENINGS) |
| 332 | chan->chan_openings++; |
| 333 | else |
| 334 | adapt->adapt_openings++; |
| 335 | } |
| 336 | |
| 337 | /* |
| 338 | * scsipi_get_tag: |
| 339 | * |
| 340 | * Get a tag ID for the specified xfer. |
| 341 | * |
| 342 | * NOTE: Must be called with channel lock held |
| 343 | */ |
| 344 | static void |
| 345 | scsipi_get_tag(struct scsipi_xfer *xs) |
| 346 | { |
| 347 | struct scsipi_periph *periph = xs->xs_periph; |
| 348 | int bit, tag; |
| 349 | u_int word; |
| 350 | |
| 351 | bit = 0; /* XXX gcc */ |
| 352 | for (word = 0; word < PERIPH_NTAGWORDS; word++) { |
| 353 | bit = ffs(periph->periph_freetags[word]); |
| 354 | if (bit != 0) |
| 355 | break; |
| 356 | } |
| 357 | #ifdef DIAGNOSTIC |
| 358 | if (word == PERIPH_NTAGWORDS) { |
| 359 | scsipi_printaddr(periph); |
| 360 | printf("no free tags\n" ); |
| 361 | panic("scsipi_get_tag" ); |
| 362 | } |
| 363 | #endif |
| 364 | |
| 365 | bit -= 1; |
| 366 | periph->periph_freetags[word] &= ~(1 << bit); |
| 367 | tag = (word << 5) | bit; |
| 368 | |
| 369 | /* XXX Should eventually disallow this completely. */ |
| 370 | if (tag >= periph->periph_openings) { |
| 371 | scsipi_printaddr(periph); |
| 372 | printf("WARNING: tag %d greater than available openings %d\n" , |
| 373 | tag, periph->periph_openings); |
| 374 | } |
| 375 | |
| 376 | xs->xs_tag_id = tag; |
| 377 | } |
| 378 | |
| 379 | /* |
| 380 | * scsipi_put_tag: |
| 381 | * |
| 382 | * Put the tag ID for the specified xfer back into the pool. |
| 383 | * |
| 384 | * NOTE: Must be called with channel lock held |
| 385 | */ |
| 386 | static void |
| 387 | scsipi_put_tag(struct scsipi_xfer *xs) |
| 388 | { |
| 389 | struct scsipi_periph *periph = xs->xs_periph; |
| 390 | int word, bit; |
| 391 | |
| 392 | word = xs->xs_tag_id >> 5; |
| 393 | bit = xs->xs_tag_id & 0x1f; |
| 394 | |
| 395 | periph->periph_freetags[word] |= (1 << bit); |
| 396 | } |
| 397 | |
| 398 | /* |
| 399 | * scsipi_get_xs: |
| 400 | * |
| 401 | * Allocate an xfer descriptor and associate it with the |
| 402 | * specified peripheral. If the peripheral has no more |
| 403 | * available command openings, we either block waiting for |
| 404 | * one to become available, or fail. |
| 405 | * |
| 406 | * When this routine is called with the channel lock held |
| 407 | * the flags must include XS_CTL_NOSLEEP. |
| 408 | */ |
| 409 | struct scsipi_xfer * |
| 410 | scsipi_get_xs(struct scsipi_periph *periph, int flags) |
| 411 | { |
| 412 | struct scsipi_xfer *xs; |
| 413 | |
| 414 | SC_DEBUG(periph, SCSIPI_DB3, ("scsipi_get_xs\n" )); |
| 415 | |
| 416 | KASSERT(!cold); |
| 417 | |
| 418 | #ifdef DIAGNOSTIC |
| 419 | /* |
| 420 | * URGENT commands can never be ASYNC. |
| 421 | */ |
| 422 | if ((flags & (XS_CTL_URGENT|XS_CTL_ASYNC)) == |
| 423 | (XS_CTL_URGENT|XS_CTL_ASYNC)) { |
| 424 | scsipi_printaddr(periph); |
| 425 | printf("URGENT and ASYNC\n" ); |
| 426 | panic("scsipi_get_xs" ); |
| 427 | } |
| 428 | #endif |
| 429 | |
| 430 | /* |
| 431 | * Wait for a command opening to become available. Rules: |
| 432 | * |
| 433 | * - All xfers must wait for an available opening. |
| 434 | * Exception: URGENT xfers can proceed when |
| 435 | * active == openings, because we use the opening |
| 436 | * of the command we're recovering for. |
| 437 | * - if the periph has sense pending, only URGENT & REQSENSE |
| 438 | * xfers may proceed. |
| 439 | * |
| 440 | * - If the periph is recovering, only URGENT xfers may |
| 441 | * proceed. |
| 442 | * |
| 443 | * - If the periph is currently executing a recovery |
| 444 | * command, URGENT commands must block, because only |
| 445 | * one recovery command can execute at a time. |
| 446 | */ |
| 447 | for (;;) { |
| 448 | if (flags & XS_CTL_URGENT) { |
| 449 | if (periph->periph_active > periph->periph_openings) |
| 450 | goto wait_for_opening; |
| 451 | if (periph->periph_flags & PERIPH_SENSE) { |
| 452 | if ((flags & XS_CTL_REQSENSE) == 0) |
| 453 | goto wait_for_opening; |
| 454 | } else { |
| 455 | if ((periph->periph_flags & |
| 456 | PERIPH_RECOVERY_ACTIVE) != 0) |
| 457 | goto wait_for_opening; |
| 458 | periph->periph_flags |= PERIPH_RECOVERY_ACTIVE; |
| 459 | } |
| 460 | break; |
| 461 | } |
| 462 | if (periph->periph_active >= periph->periph_openings || |
| 463 | (periph->periph_flags & PERIPH_RECOVERING) != 0) |
| 464 | goto wait_for_opening; |
| 465 | periph->periph_active++; |
| 466 | break; |
| 467 | |
| 468 | wait_for_opening: |
| 469 | if (flags & XS_CTL_NOSLEEP) { |
| 470 | return (NULL); |
| 471 | } |
| 472 | SC_DEBUG(periph, SCSIPI_DB3, ("sleeping\n" )); |
| 473 | mutex_enter(chan_mtx(periph->periph_channel)); |
| 474 | periph->periph_flags |= PERIPH_WAITING; |
| 475 | cv_wait(periph_cv_periph(periph), |
| 476 | chan_mtx(periph->periph_channel)); |
| 477 | mutex_exit(chan_mtx(periph->periph_channel)); |
| 478 | } |
| 479 | |
| 480 | SC_DEBUG(periph, SCSIPI_DB3, ("calling pool_get\n" )); |
| 481 | xs = pool_get(&scsipi_xfer_pool, |
| 482 | ((flags & XS_CTL_NOSLEEP) != 0 ? PR_NOWAIT : PR_WAITOK)); |
| 483 | if (xs == NULL) { |
| 484 | if (flags & XS_CTL_URGENT) { |
| 485 | if ((flags & XS_CTL_REQSENSE) == 0) |
| 486 | periph->periph_flags &= ~PERIPH_RECOVERY_ACTIVE; |
| 487 | } else |
| 488 | periph->periph_active--; |
| 489 | scsipi_printaddr(periph); |
| 490 | printf("unable to allocate %sscsipi_xfer\n" , |
| 491 | (flags & XS_CTL_URGENT) ? "URGENT " : "" ); |
| 492 | } |
| 493 | |
| 494 | SC_DEBUG(periph, SCSIPI_DB3, ("returning\n" )); |
| 495 | |
| 496 | if (xs != NULL) { |
| 497 | memset(xs, 0, sizeof(*xs)); |
| 498 | callout_init(&xs->xs_callout, 0); |
| 499 | xs->xs_periph = periph; |
| 500 | xs->xs_control = flags; |
| 501 | xs->xs_status = 0; |
| 502 | if ((flags & XS_CTL_NOSLEEP) == 0) |
| 503 | mutex_enter(chan_mtx(periph->periph_channel)); |
| 504 | TAILQ_INSERT_TAIL(&periph->periph_xferq, xs, device_q); |
| 505 | if ((flags & XS_CTL_NOSLEEP) == 0) |
| 506 | mutex_exit(chan_mtx(periph->periph_channel)); |
| 507 | } |
| 508 | return (xs); |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * scsipi_put_xs: |
| 513 | * |
| 514 | * Release an xfer descriptor, decreasing the outstanding command |
| 515 | * count for the peripheral. If there is a thread waiting for |
| 516 | * an opening, wake it up. If not, kick any queued I/O the |
| 517 | * peripheral may have. |
| 518 | * |
| 519 | * NOTE: Must be called with channel lock held |
| 520 | */ |
| 521 | void |
| 522 | scsipi_put_xs(struct scsipi_xfer *xs) |
| 523 | { |
| 524 | struct scsipi_periph *periph = xs->xs_periph; |
| 525 | int flags = xs->xs_control; |
| 526 | |
| 527 | SC_DEBUG(periph, SCSIPI_DB3, ("scsipi_free_xs\n" )); |
| 528 | |
| 529 | TAILQ_REMOVE(&periph->periph_xferq, xs, device_q); |
| 530 | callout_destroy(&xs->xs_callout); |
| 531 | pool_put(&scsipi_xfer_pool, xs); |
| 532 | |
| 533 | #ifdef DIAGNOSTIC |
| 534 | if ((periph->periph_flags & PERIPH_RECOVERY_ACTIVE) != 0 && |
| 535 | periph->periph_active == 0) { |
| 536 | scsipi_printaddr(periph); |
| 537 | printf("recovery without a command to recovery for\n" ); |
| 538 | panic("scsipi_put_xs" ); |
| 539 | } |
| 540 | #endif |
| 541 | |
| 542 | if (flags & XS_CTL_URGENT) { |
| 543 | if ((flags & XS_CTL_REQSENSE) == 0) |
| 544 | periph->periph_flags &= ~PERIPH_RECOVERY_ACTIVE; |
| 545 | } else |
| 546 | periph->periph_active--; |
| 547 | if (periph->periph_active == 0 && |
| 548 | (periph->periph_flags & PERIPH_WAITDRAIN) != 0) { |
| 549 | periph->periph_flags &= ~PERIPH_WAITDRAIN; |
| 550 | cv_broadcast(periph_cv_active(periph)); |
| 551 | } |
| 552 | |
| 553 | if (periph->periph_flags & PERIPH_WAITING) { |
| 554 | periph->periph_flags &= ~PERIPH_WAITING; |
| 555 | cv_broadcast(periph_cv_periph(periph)); |
| 556 | } else { |
| 557 | if (periph->periph_switch->psw_start != NULL && |
| 558 | device_is_active(periph->periph_dev)) { |
| 559 | SC_DEBUG(periph, SCSIPI_DB2, |
| 560 | ("calling private start()\n" )); |
| 561 | (*periph->periph_switch->psw_start)(periph); |
| 562 | } |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * scsipi_channel_freeze: |
| 568 | * |
| 569 | * Freeze a channel's xfer queue. |
| 570 | */ |
| 571 | void |
| 572 | scsipi_channel_freeze(struct scsipi_channel *chan, int count) |
| 573 | { |
| 574 | bool lock = chan_running(chan); |
| 575 | |
| 576 | if (lock) |
| 577 | mutex_enter(chan_mtx(chan)); |
| 578 | chan->chan_qfreeze += count; |
| 579 | if (lock) |
| 580 | mutex_exit(chan_mtx(chan)); |
| 581 | } |
| 582 | |
| 583 | static void |
| 584 | scsipi_channel_freeze_locked(struct scsipi_channel *chan, int count) |
| 585 | { |
| 586 | |
| 587 | chan->chan_qfreeze += count; |
| 588 | } |
| 589 | |
| 590 | /* |
| 591 | * scsipi_channel_thaw: |
| 592 | * |
| 593 | * Thaw a channel's xfer queue. |
| 594 | */ |
| 595 | void |
| 596 | scsipi_channel_thaw(struct scsipi_channel *chan, int count) |
| 597 | { |
| 598 | bool lock = chan_running(chan); |
| 599 | |
| 600 | if (lock) |
| 601 | mutex_enter(chan_mtx(chan)); |
| 602 | chan->chan_qfreeze -= count; |
| 603 | /* |
| 604 | * Don't let the freeze count go negative. |
| 605 | * |
| 606 | * Presumably the adapter driver could keep track of this, |
| 607 | * but it might just be easier to do this here so as to allow |
| 608 | * multiple callers, including those outside the adapter driver. |
| 609 | */ |
| 610 | if (chan->chan_qfreeze < 0) { |
| 611 | chan->chan_qfreeze = 0; |
| 612 | } |
| 613 | if (lock) |
| 614 | mutex_exit(chan_mtx(chan)); |
| 615 | |
| 616 | /* |
| 617 | * until the channel is running |
| 618 | */ |
| 619 | if (!lock) |
| 620 | return; |
| 621 | |
| 622 | /* |
| 623 | * Kick the channel's queue here. Note, we may be running in |
| 624 | * interrupt context (softclock or HBA's interrupt), so the adapter |
| 625 | * driver had better not sleep. |
| 626 | */ |
| 627 | if (chan->chan_qfreeze == 0) |
| 628 | scsipi_run_queue(chan); |
| 629 | } |
| 630 | |
| 631 | /* |
| 632 | * scsipi_channel_timed_thaw: |
| 633 | * |
| 634 | * Thaw a channel after some time has expired. This will also |
| 635 | * run the channel's queue if the freeze count has reached 0. |
| 636 | */ |
| 637 | void |
| 638 | scsipi_channel_timed_thaw(void *arg) |
| 639 | { |
| 640 | struct scsipi_channel *chan = arg; |
| 641 | |
| 642 | scsipi_channel_thaw(chan, 1); |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * scsipi_periph_freeze: |
| 647 | * |
| 648 | * Freeze a device's xfer queue. |
| 649 | */ |
| 650 | void |
| 651 | scsipi_periph_freeze_locked(struct scsipi_periph *periph, int count) |
| 652 | { |
| 653 | |
| 654 | periph->periph_qfreeze += count; |
| 655 | } |
| 656 | |
| 657 | /* |
| 658 | * scsipi_periph_thaw: |
| 659 | * |
| 660 | * Thaw a device's xfer queue. |
| 661 | */ |
| 662 | void |
| 663 | scsipi_periph_thaw_locked(struct scsipi_periph *periph, int count) |
| 664 | { |
| 665 | |
| 666 | periph->periph_qfreeze -= count; |
| 667 | #ifdef DIAGNOSTIC |
| 668 | if (periph->periph_qfreeze < 0) { |
| 669 | static const char pc[] = "periph freeze count < 0" ; |
| 670 | scsipi_printaddr(periph); |
| 671 | printf("%s\n" , pc); |
| 672 | panic(pc); |
| 673 | } |
| 674 | #endif |
| 675 | if (periph->periph_qfreeze == 0 && |
| 676 | (periph->periph_flags & PERIPH_WAITING) != 0) |
| 677 | cv_broadcast(periph_cv_periph(periph)); |
| 678 | } |
| 679 | |
| 680 | void |
| 681 | scsipi_periph_freeze(struct scsipi_periph *periph, int count) |
| 682 | { |
| 683 | |
| 684 | mutex_enter(chan_mtx(periph->periph_channel)); |
| 685 | scsipi_periph_freeze_locked(periph, count); |
| 686 | mutex_exit(chan_mtx(periph->periph_channel)); |
| 687 | } |
| 688 | |
| 689 | void |
| 690 | scsipi_periph_thaw(struct scsipi_periph *periph, int count) |
| 691 | { |
| 692 | |
| 693 | mutex_enter(chan_mtx(periph->periph_channel)); |
| 694 | scsipi_periph_thaw_locked(periph, count); |
| 695 | mutex_exit(chan_mtx(periph->periph_channel)); |
| 696 | } |
| 697 | |
| 698 | /* |
| 699 | * scsipi_periph_timed_thaw: |
| 700 | * |
| 701 | * Thaw a device after some time has expired. |
| 702 | */ |
| 703 | void |
| 704 | scsipi_periph_timed_thaw(void *arg) |
| 705 | { |
| 706 | struct scsipi_periph *periph = arg; |
| 707 | struct scsipi_channel *chan = periph->periph_channel; |
| 708 | |
| 709 | callout_stop(&periph->periph_callout); |
| 710 | |
| 711 | mutex_enter(chan_mtx(chan)); |
| 712 | scsipi_periph_thaw_locked(periph, 1); |
| 713 | if ((periph->periph_channel->chan_flags & SCSIPI_CHAN_TACTIVE) == 0) { |
| 714 | /* |
| 715 | * Kick the channel's queue here. Note, we're running in |
| 716 | * interrupt context (softclock), so the adapter driver |
| 717 | * had better not sleep. |
| 718 | */ |
| 719 | mutex_exit(chan_mtx(chan)); |
| 720 | scsipi_run_queue(periph->periph_channel); |
| 721 | } else { |
| 722 | /* |
| 723 | * Tell the completion thread to kick the channel's queue here. |
| 724 | */ |
| 725 | periph->periph_channel->chan_tflags |= SCSIPI_CHANT_KICK; |
| 726 | cv_broadcast(chan_cv_complete(chan)); |
| 727 | mutex_exit(chan_mtx(chan)); |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | /* |
| 732 | * scsipi_wait_drain: |
| 733 | * |
| 734 | * Wait for a periph's pending xfers to drain. |
| 735 | */ |
| 736 | void |
| 737 | scsipi_wait_drain(struct scsipi_periph *periph) |
| 738 | { |
| 739 | struct scsipi_channel *chan = periph->periph_channel; |
| 740 | |
| 741 | mutex_enter(chan_mtx(chan)); |
| 742 | while (periph->periph_active != 0) { |
| 743 | periph->periph_flags |= PERIPH_WAITDRAIN; |
| 744 | cv_wait(periph_cv_active(periph), chan_mtx(chan)); |
| 745 | } |
| 746 | mutex_exit(chan_mtx(chan)); |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * scsipi_kill_pending: |
| 751 | * |
| 752 | * Kill off all pending xfers for a periph. |
| 753 | * |
| 754 | * NOTE: Must be called with channel lock held |
| 755 | */ |
| 756 | void |
| 757 | scsipi_kill_pending(struct scsipi_periph *periph) |
| 758 | { |
| 759 | struct scsipi_channel *chan = periph->periph_channel; |
| 760 | |
| 761 | (*chan->chan_bustype->bustype_kill_pending)(periph); |
| 762 | while (periph->periph_active != 0) { |
| 763 | periph->periph_flags |= PERIPH_WAITDRAIN; |
| 764 | cv_wait(periph_cv_active(periph), chan_mtx(chan)); |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | /* |
| 769 | * scsipi_print_cdb: |
| 770 | * prints a command descriptor block (for debug purpose, error messages, |
| 771 | * SCSIVERBOSE, ...) |
| 772 | */ |
| 773 | void |
| 774 | scsipi_print_cdb(struct scsipi_generic *cmd) |
| 775 | { |
| 776 | int i, j; |
| 777 | |
| 778 | printf("0x%02x" , cmd->opcode); |
| 779 | |
| 780 | switch (CDB_GROUPID(cmd->opcode)) { |
| 781 | case CDB_GROUPID_0: |
| 782 | j = CDB_GROUP0; |
| 783 | break; |
| 784 | case CDB_GROUPID_1: |
| 785 | j = CDB_GROUP1; |
| 786 | break; |
| 787 | case CDB_GROUPID_2: |
| 788 | j = CDB_GROUP2; |
| 789 | break; |
| 790 | case CDB_GROUPID_3: |
| 791 | j = CDB_GROUP3; |
| 792 | break; |
| 793 | case CDB_GROUPID_4: |
| 794 | j = CDB_GROUP4; |
| 795 | break; |
| 796 | case CDB_GROUPID_5: |
| 797 | j = CDB_GROUP5; |
| 798 | break; |
| 799 | case CDB_GROUPID_6: |
| 800 | j = CDB_GROUP6; |
| 801 | break; |
| 802 | case CDB_GROUPID_7: |
| 803 | j = CDB_GROUP7; |
| 804 | break; |
| 805 | default: |
| 806 | j = 0; |
| 807 | } |
| 808 | if (j == 0) |
| 809 | j = sizeof (cmd->bytes); |
| 810 | for (i = 0; i < j-1; i++) /* already done the opcode */ |
| 811 | printf(" %02x" , cmd->bytes[i]); |
| 812 | } |
| 813 | |
| 814 | /* |
| 815 | * scsipi_interpret_sense: |
| 816 | * |
| 817 | * Look at the returned sense and act on the error, determining |
| 818 | * the unix error number to pass back. (0 = report no error) |
| 819 | * |
| 820 | * NOTE: If we return ERESTART, we are expected to haved |
| 821 | * thawed the device! |
| 822 | * |
| 823 | * THIS IS THE DEFAULT ERROR HANDLER FOR SCSI DEVICES. |
| 824 | */ |
| 825 | int |
| 826 | scsipi_interpret_sense(struct scsipi_xfer *xs) |
| 827 | { |
| 828 | struct scsi_sense_data *sense; |
| 829 | struct scsipi_periph *periph = xs->xs_periph; |
| 830 | u_int8_t key; |
| 831 | int error; |
| 832 | u_int32_t info; |
| 833 | static const char *error_mes[] = { |
| 834 | "soft error (corrected)" , |
| 835 | "not ready" , "medium error" , |
| 836 | "non-media hardware failure" , "illegal request" , |
| 837 | "unit attention" , "readonly device" , |
| 838 | "no data found" , "vendor unique" , |
| 839 | "copy aborted" , "command aborted" , |
| 840 | "search returned equal" , "volume overflow" , |
| 841 | "verify miscompare" , "unknown error key" |
| 842 | }; |
| 843 | |
| 844 | sense = &xs->sense.scsi_sense; |
| 845 | #ifdef SCSIPI_DEBUG |
| 846 | if (periph->periph_flags & SCSIPI_DB1) { |
| 847 | int count; |
| 848 | scsipi_printaddr(periph); |
| 849 | printf(" sense debug information:\n" ); |
| 850 | printf("\tcode 0x%x valid %d\n" , |
| 851 | SSD_RCODE(sense->response_code), |
| 852 | sense->response_code & SSD_RCODE_VALID ? 1 : 0); |
| 853 | printf("\tseg 0x%x key 0x%x ili 0x%x eom 0x%x fmark 0x%x\n" , |
| 854 | sense->segment, |
| 855 | SSD_SENSE_KEY(sense->flags), |
| 856 | sense->flags & SSD_ILI ? 1 : 0, |
| 857 | sense->flags & SSD_EOM ? 1 : 0, |
| 858 | sense->flags & SSD_FILEMARK ? 1 : 0); |
| 859 | printf("\ninfo: 0x%x 0x%x 0x%x 0x%x followed by %d " |
| 860 | "extra bytes\n" , |
| 861 | sense->info[0], |
| 862 | sense->info[1], |
| 863 | sense->info[2], |
| 864 | sense->info[3], |
| 865 | sense->extra_len); |
| 866 | printf("\textra: " ); |
| 867 | for (count = 0; count < SSD_ADD_BYTES_LIM(sense); count++) |
| 868 | printf("0x%x " , sense->csi[count]); |
| 869 | printf("\n" ); |
| 870 | } |
| 871 | #endif |
| 872 | |
| 873 | /* |
| 874 | * If the periph has its own error handler, call it first. |
| 875 | * If it returns a legit error value, return that, otherwise |
| 876 | * it wants us to continue with normal error processing. |
| 877 | */ |
| 878 | if (periph->periph_switch->psw_error != NULL) { |
| 879 | SC_DEBUG(periph, SCSIPI_DB2, |
| 880 | ("calling private err_handler()\n" )); |
| 881 | error = (*periph->periph_switch->psw_error)(xs); |
| 882 | if (error != EJUSTRETURN) |
| 883 | return (error); |
| 884 | } |
| 885 | /* otherwise use the default */ |
| 886 | switch (SSD_RCODE(sense->response_code)) { |
| 887 | |
| 888 | /* |
| 889 | * Old SCSI-1 and SASI devices respond with |
| 890 | * codes other than 70. |
| 891 | */ |
| 892 | case 0x00: /* no error (command completed OK) */ |
| 893 | return (0); |
| 894 | case 0x04: /* drive not ready after it was selected */ |
| 895 | if ((periph->periph_flags & PERIPH_REMOVABLE) != 0) |
| 896 | periph->periph_flags &= ~PERIPH_MEDIA_LOADED; |
| 897 | if ((xs->xs_control & XS_CTL_IGNORE_NOT_READY) != 0) |
| 898 | return (0); |
| 899 | /* XXX - display some sort of error here? */ |
| 900 | return (EIO); |
| 901 | case 0x20: /* invalid command */ |
| 902 | if ((xs->xs_control & |
| 903 | XS_CTL_IGNORE_ILLEGAL_REQUEST) != 0) |
| 904 | return (0); |
| 905 | return (EINVAL); |
| 906 | case 0x25: /* invalid LUN (Adaptec ACB-4000) */ |
| 907 | return (EACCES); |
| 908 | |
| 909 | /* |
| 910 | * If it's code 70, use the extended stuff and |
| 911 | * interpret the key |
| 912 | */ |
| 913 | case 0x71: /* delayed error */ |
| 914 | scsipi_printaddr(periph); |
| 915 | key = SSD_SENSE_KEY(sense->flags); |
| 916 | printf(" DEFERRED ERROR, key = 0x%x\n" , key); |
| 917 | /* FALLTHROUGH */ |
| 918 | case 0x70: |
| 919 | if ((sense->response_code & SSD_RCODE_VALID) != 0) |
| 920 | info = _4btol(sense->info); |
| 921 | else |
| 922 | info = 0; |
| 923 | key = SSD_SENSE_KEY(sense->flags); |
| 924 | |
| 925 | switch (key) { |
| 926 | case SKEY_NO_SENSE: |
| 927 | case SKEY_RECOVERED_ERROR: |
| 928 | if (xs->resid == xs->datalen && xs->datalen) { |
| 929 | /* |
| 930 | * Why is this here? |
| 931 | */ |
| 932 | xs->resid = 0; /* not short read */ |
| 933 | } |
| 934 | case SKEY_EQUAL: |
| 935 | error = 0; |
| 936 | break; |
| 937 | case SKEY_NOT_READY: |
| 938 | if ((periph->periph_flags & PERIPH_REMOVABLE) != 0) |
| 939 | periph->periph_flags &= ~PERIPH_MEDIA_LOADED; |
| 940 | if ((xs->xs_control & XS_CTL_IGNORE_NOT_READY) != 0) |
| 941 | return (0); |
| 942 | if (sense->asc == 0x3A) { |
| 943 | error = ENODEV; /* Medium not present */ |
| 944 | if (xs->xs_control & XS_CTL_SILENT_NODEV) |
| 945 | return (error); |
| 946 | } else |
| 947 | error = EIO; |
| 948 | if ((xs->xs_control & XS_CTL_SILENT) != 0) |
| 949 | return (error); |
| 950 | break; |
| 951 | case SKEY_ILLEGAL_REQUEST: |
| 952 | if ((xs->xs_control & |
| 953 | XS_CTL_IGNORE_ILLEGAL_REQUEST) != 0) |
| 954 | return (0); |
| 955 | /* |
| 956 | * Handle the case where a device reports |
| 957 | * Logical Unit Not Supported during discovery. |
| 958 | */ |
| 959 | if ((xs->xs_control & XS_CTL_DISCOVERY) != 0 && |
| 960 | sense->asc == 0x25 && |
| 961 | sense->ascq == 0x00) |
| 962 | return (EINVAL); |
| 963 | if ((xs->xs_control & XS_CTL_SILENT) != 0) |
| 964 | return (EIO); |
| 965 | error = EINVAL; |
| 966 | break; |
| 967 | case SKEY_UNIT_ATTENTION: |
| 968 | if (sense->asc == 0x29 && |
| 969 | sense->ascq == 0x00) { |
| 970 | /* device or bus reset */ |
| 971 | return (ERESTART); |
| 972 | } |
| 973 | if ((periph->periph_flags & PERIPH_REMOVABLE) != 0) |
| 974 | periph->periph_flags &= ~PERIPH_MEDIA_LOADED; |
| 975 | if ((xs->xs_control & |
| 976 | XS_CTL_IGNORE_MEDIA_CHANGE) != 0 || |
| 977 | /* XXX Should reupload any transient state. */ |
| 978 | (periph->periph_flags & |
| 979 | PERIPH_REMOVABLE) == 0) { |
| 980 | return (ERESTART); |
| 981 | } |
| 982 | if ((xs->xs_control & XS_CTL_SILENT) != 0) |
| 983 | return (EIO); |
| 984 | error = EIO; |
| 985 | break; |
| 986 | case SKEY_DATA_PROTECT: |
| 987 | error = EROFS; |
| 988 | break; |
| 989 | case SKEY_BLANK_CHECK: |
| 990 | error = 0; |
| 991 | break; |
| 992 | case SKEY_ABORTED_COMMAND: |
| 993 | if (xs->xs_retries != 0) { |
| 994 | xs->xs_retries--; |
| 995 | error = ERESTART; |
| 996 | } else |
| 997 | error = EIO; |
| 998 | break; |
| 999 | case SKEY_VOLUME_OVERFLOW: |
| 1000 | error = ENOSPC; |
| 1001 | break; |
| 1002 | default: |
| 1003 | error = EIO; |
| 1004 | break; |
| 1005 | } |
| 1006 | |
| 1007 | /* Print verbose decode if appropriate and possible */ |
| 1008 | if ((key == 0) || |
| 1009 | ((xs->xs_control & XS_CTL_SILENT) != 0) || |
| 1010 | (scsipi_print_sense(xs, 0) != 0)) |
| 1011 | return (error); |
| 1012 | |
| 1013 | /* Print brief(er) sense information */ |
| 1014 | scsipi_printaddr(periph); |
| 1015 | printf("%s" , error_mes[key - 1]); |
| 1016 | if ((sense->response_code & SSD_RCODE_VALID) != 0) { |
| 1017 | switch (key) { |
| 1018 | case SKEY_NOT_READY: |
| 1019 | case SKEY_ILLEGAL_REQUEST: |
| 1020 | case SKEY_UNIT_ATTENTION: |
| 1021 | case SKEY_DATA_PROTECT: |
| 1022 | break; |
| 1023 | case SKEY_BLANK_CHECK: |
| 1024 | printf(", requested size: %d (decimal)" , |
| 1025 | info); |
| 1026 | break; |
| 1027 | case SKEY_ABORTED_COMMAND: |
| 1028 | if (xs->xs_retries) |
| 1029 | printf(", retrying" ); |
| 1030 | printf(", cmd 0x%x, info 0x%x" , |
| 1031 | xs->cmd->opcode, info); |
| 1032 | break; |
| 1033 | default: |
| 1034 | printf(", info = %d (decimal)" , info); |
| 1035 | } |
| 1036 | } |
| 1037 | if (sense->extra_len != 0) { |
| 1038 | int n; |
| 1039 | printf(", data =" ); |
| 1040 | for (n = 0; n < sense->extra_len; n++) |
| 1041 | printf(" %02x" , |
| 1042 | sense->csi[n]); |
| 1043 | } |
| 1044 | printf("\n" ); |
| 1045 | return (error); |
| 1046 | |
| 1047 | /* |
| 1048 | * Some other code, just report it |
| 1049 | */ |
| 1050 | default: |
| 1051 | #if defined(SCSIDEBUG) || defined(DEBUG) |
| 1052 | { |
| 1053 | static const char *uc = "undecodable sense error" ; |
| 1054 | int i; |
| 1055 | u_int8_t *cptr = (u_int8_t *) sense; |
| 1056 | scsipi_printaddr(periph); |
| 1057 | if (xs->cmd == &xs->cmdstore) { |
| 1058 | printf("%s for opcode 0x%x, data=" , |
| 1059 | uc, xs->cmdstore.opcode); |
| 1060 | } else { |
| 1061 | printf("%s, data=" , uc); |
| 1062 | } |
| 1063 | for (i = 0; i < sizeof (sense); i++) |
| 1064 | printf(" 0x%02x" , *(cptr++) & 0xff); |
| 1065 | printf("\n" ); |
| 1066 | } |
| 1067 | #else |
| 1068 | scsipi_printaddr(periph); |
| 1069 | printf("Sense Error Code 0x%x" , |
| 1070 | SSD_RCODE(sense->response_code)); |
| 1071 | if ((sense->response_code & SSD_RCODE_VALID) != 0) { |
| 1072 | struct scsi_sense_data_unextended *usense = |
| 1073 | (struct scsi_sense_data_unextended *)sense; |
| 1074 | printf(" at block no. %d (decimal)" , |
| 1075 | _3btol(usense->block)); |
| 1076 | } |
| 1077 | printf("\n" ); |
| 1078 | #endif |
| 1079 | return (EIO); |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | /* |
| 1084 | * scsipi_test_unit_ready: |
| 1085 | * |
| 1086 | * Issue a `test unit ready' request. |
| 1087 | */ |
| 1088 | int |
| 1089 | scsipi_test_unit_ready(struct scsipi_periph *periph, int flags) |
| 1090 | { |
| 1091 | struct scsi_test_unit_ready cmd; |
| 1092 | int retries; |
| 1093 | |
| 1094 | /* some ATAPI drives don't support TEST UNIT READY. Sigh */ |
| 1095 | if (periph->periph_quirks & PQUIRK_NOTUR) |
| 1096 | return (0); |
| 1097 | |
| 1098 | if (flags & XS_CTL_DISCOVERY) |
| 1099 | retries = 0; |
| 1100 | else |
| 1101 | retries = SCSIPIRETRIES; |
| 1102 | |
| 1103 | memset(&cmd, 0, sizeof(cmd)); |
| 1104 | cmd.opcode = SCSI_TEST_UNIT_READY; |
| 1105 | |
| 1106 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0, |
| 1107 | retries, 10000, NULL, flags)); |
| 1108 | } |
| 1109 | |
| 1110 | static const struct scsipi_inquiry3_pattern { |
| 1111 | const char vendor[8]; |
| 1112 | const char product[16]; |
| 1113 | const char revision[4]; |
| 1114 | } scsipi_inquiry3_quirk[] = { |
| 1115 | { "ES-6600 " , "" , "" }, |
| 1116 | }; |
| 1117 | |
| 1118 | static int |
| 1119 | scsipi_inquiry3_ok(const struct scsipi_inquiry_data *ib) |
| 1120 | { |
| 1121 | for (size_t i = 0; i < __arraycount(scsipi_inquiry3_quirk); i++) { |
| 1122 | const struct scsipi_inquiry3_pattern *q = |
| 1123 | &scsipi_inquiry3_quirk[i]; |
| 1124 | #define MATCH(field) \ |
| 1125 | (q->field[0] ? memcmp(ib->field, q->field, sizeof(ib->field)) == 0 : 1) |
| 1126 | if (MATCH(vendor) && MATCH(product) && MATCH(revision)) |
| 1127 | return 0; |
| 1128 | } |
| 1129 | return 1; |
| 1130 | } |
| 1131 | |
| 1132 | /* |
| 1133 | * scsipi_inquire: |
| 1134 | * |
| 1135 | * Ask the device about itself. |
| 1136 | */ |
| 1137 | int |
| 1138 | scsipi_inquire(struct scsipi_periph *periph, struct scsipi_inquiry_data *inqbuf, |
| 1139 | int flags) |
| 1140 | { |
| 1141 | struct scsipi_inquiry cmd; |
| 1142 | int error; |
| 1143 | int retries; |
| 1144 | |
| 1145 | if (flags & XS_CTL_DISCOVERY) |
| 1146 | retries = 0; |
| 1147 | else |
| 1148 | retries = SCSIPIRETRIES; |
| 1149 | |
| 1150 | /* |
| 1151 | * If we request more data than the device can provide, it SHOULD just |
| 1152 | * return a short response. However, some devices error with an |
| 1153 | * ILLEGAL REQUEST sense code, and yet others have even more special |
| 1154 | * failture modes (such as the GL641USB flash adapter, which goes loony |
| 1155 | * and sends corrupted CRCs). To work around this, and to bring our |
| 1156 | * behavior more in line with other OSes, we do a shorter inquiry, |
| 1157 | * covering all the SCSI-2 information, first, and then request more |
| 1158 | * data iff the "additional length" field indicates there is more. |
| 1159 | * - mycroft, 2003/10/16 |
| 1160 | */ |
| 1161 | memset(&cmd, 0, sizeof(cmd)); |
| 1162 | cmd.opcode = INQUIRY; |
| 1163 | cmd.length = SCSIPI_INQUIRY_LENGTH_SCSI2; |
| 1164 | error = scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 1165 | (void *)inqbuf, SCSIPI_INQUIRY_LENGTH_SCSI2, retries, |
| 1166 | 10000, NULL, flags | XS_CTL_DATA_IN); |
| 1167 | if (!error && |
| 1168 | inqbuf->additional_length > SCSIPI_INQUIRY_LENGTH_SCSI2 - 4) { |
| 1169 | if (scsipi_inquiry3_ok(inqbuf)) { |
| 1170 | #if 0 |
| 1171 | printf("inquire: addlen=%d, retrying\n" , inqbuf->additional_length); |
| 1172 | #endif |
| 1173 | cmd.length = SCSIPI_INQUIRY_LENGTH_SCSI3; |
| 1174 | error = scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 1175 | (void *)inqbuf, SCSIPI_INQUIRY_LENGTH_SCSI3, retries, |
| 1176 | 10000, NULL, flags | XS_CTL_DATA_IN); |
| 1177 | #if 0 |
| 1178 | printf("inquire: error=%d\n" , error); |
| 1179 | #endif |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | #ifdef SCSI_OLD_NOINQUIRY |
| 1184 | /* |
| 1185 | * Kludge for the Adaptec ACB-4000 SCSI->MFM translator. |
| 1186 | * This board doesn't support the INQUIRY command at all. |
| 1187 | */ |
| 1188 | if (error == EINVAL || error == EACCES) { |
| 1189 | /* |
| 1190 | * Conjure up an INQUIRY response. |
| 1191 | */ |
| 1192 | inqbuf->device = (error == EINVAL ? |
| 1193 | SID_QUAL_LU_PRESENT : |
| 1194 | SID_QUAL_LU_NOTPRESENT) | T_DIRECT; |
| 1195 | inqbuf->dev_qual2 = 0; |
| 1196 | inqbuf->version = 0; |
| 1197 | inqbuf->response_format = SID_FORMAT_SCSI1; |
| 1198 | inqbuf->additional_length = SCSIPI_INQUIRY_LENGTH_SCSI2 - 4; |
| 1199 | inqbuf->flags1 = inqbuf->flags2 = inqbuf->flags3 = 0; |
| 1200 | memcpy(inqbuf->vendor, "ADAPTEC ACB-4000 " , 28); |
| 1201 | error = 0; |
| 1202 | } |
| 1203 | |
| 1204 | /* |
| 1205 | * Kludge for the Emulex MT-02 SCSI->QIC translator. |
| 1206 | * This board gives an empty response to an INQUIRY command. |
| 1207 | */ |
| 1208 | else if (error == 0 && |
| 1209 | inqbuf->device == (SID_QUAL_LU_PRESENT | T_DIRECT) && |
| 1210 | inqbuf->dev_qual2 == 0 && |
| 1211 | inqbuf->version == 0 && |
| 1212 | inqbuf->response_format == SID_FORMAT_SCSI1) { |
| 1213 | /* |
| 1214 | * Fill out the INQUIRY response. |
| 1215 | */ |
| 1216 | inqbuf->device = (SID_QUAL_LU_PRESENT | T_SEQUENTIAL); |
| 1217 | inqbuf->dev_qual2 = SID_REMOVABLE; |
| 1218 | inqbuf->additional_length = SCSIPI_INQUIRY_LENGTH_SCSI2 - 4; |
| 1219 | inqbuf->flags1 = inqbuf->flags2 = inqbuf->flags3 = 0; |
| 1220 | memcpy(inqbuf->vendor, "EMULEX MT-02 QIC " , 28); |
| 1221 | } |
| 1222 | #endif /* SCSI_OLD_NOINQUIRY */ |
| 1223 | |
| 1224 | return error; |
| 1225 | } |
| 1226 | |
| 1227 | /* |
| 1228 | * scsipi_prevent: |
| 1229 | * |
| 1230 | * Prevent or allow the user to remove the media |
| 1231 | */ |
| 1232 | int |
| 1233 | scsipi_prevent(struct scsipi_periph *periph, int type, int flags) |
| 1234 | { |
| 1235 | struct scsi_prevent_allow_medium_removal cmd; |
| 1236 | |
| 1237 | if (periph->periph_quirks & PQUIRK_NODOORLOCK) |
| 1238 | return 0; |
| 1239 | |
| 1240 | memset(&cmd, 0, sizeof(cmd)); |
| 1241 | cmd.opcode = SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL; |
| 1242 | cmd.how = type; |
| 1243 | |
| 1244 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0, |
| 1245 | SCSIPIRETRIES, 5000, NULL, flags)); |
| 1246 | } |
| 1247 | |
| 1248 | /* |
| 1249 | * scsipi_start: |
| 1250 | * |
| 1251 | * Send a START UNIT. |
| 1252 | */ |
| 1253 | int |
| 1254 | scsipi_start(struct scsipi_periph *periph, int type, int flags) |
| 1255 | { |
| 1256 | struct scsipi_start_stop cmd; |
| 1257 | |
| 1258 | memset(&cmd, 0, sizeof(cmd)); |
| 1259 | cmd.opcode = START_STOP; |
| 1260 | cmd.byte2 = 0x00; |
| 1261 | cmd.how = type; |
| 1262 | |
| 1263 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0, |
| 1264 | SCSIPIRETRIES, (type & SSS_START) ? 60000 : 10000, NULL, flags)); |
| 1265 | } |
| 1266 | |
| 1267 | /* |
| 1268 | * scsipi_mode_sense, scsipi_mode_sense_big: |
| 1269 | * get a sense page from a device |
| 1270 | */ |
| 1271 | |
| 1272 | int |
| 1273 | scsipi_mode_sense(struct scsipi_periph *periph, int byte2, int page, |
| 1274 | struct scsi_mode_parameter_header_6 *data, int len, int flags, int retries, |
| 1275 | int timeout) |
| 1276 | { |
| 1277 | struct scsi_mode_sense_6 cmd; |
| 1278 | |
| 1279 | memset(&cmd, 0, sizeof(cmd)); |
| 1280 | cmd.opcode = SCSI_MODE_SENSE_6; |
| 1281 | cmd.byte2 = byte2; |
| 1282 | cmd.page = page; |
| 1283 | cmd.length = len & 0xff; |
| 1284 | |
| 1285 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 1286 | (void *)data, len, retries, timeout, NULL, flags | XS_CTL_DATA_IN)); |
| 1287 | } |
| 1288 | |
| 1289 | int |
| 1290 | scsipi_mode_sense_big(struct scsipi_periph *periph, int byte2, int page, |
| 1291 | struct scsi_mode_parameter_header_10 *data, int len, int flags, int retries, |
| 1292 | int timeout) |
| 1293 | { |
| 1294 | struct scsi_mode_sense_10 cmd; |
| 1295 | |
| 1296 | memset(&cmd, 0, sizeof(cmd)); |
| 1297 | cmd.opcode = SCSI_MODE_SENSE_10; |
| 1298 | cmd.byte2 = byte2; |
| 1299 | cmd.page = page; |
| 1300 | _lto2b(len, cmd.length); |
| 1301 | |
| 1302 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 1303 | (void *)data, len, retries, timeout, NULL, flags | XS_CTL_DATA_IN)); |
| 1304 | } |
| 1305 | |
| 1306 | int |
| 1307 | scsipi_mode_select(struct scsipi_periph *periph, int byte2, |
| 1308 | struct scsi_mode_parameter_header_6 *data, int len, int flags, int retries, |
| 1309 | int timeout) |
| 1310 | { |
| 1311 | struct scsi_mode_select_6 cmd; |
| 1312 | |
| 1313 | memset(&cmd, 0, sizeof(cmd)); |
| 1314 | cmd.opcode = SCSI_MODE_SELECT_6; |
| 1315 | cmd.byte2 = byte2; |
| 1316 | cmd.length = len & 0xff; |
| 1317 | |
| 1318 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 1319 | (void *)data, len, retries, timeout, NULL, flags | XS_CTL_DATA_OUT)); |
| 1320 | } |
| 1321 | |
| 1322 | int |
| 1323 | scsipi_mode_select_big(struct scsipi_periph *periph, int byte2, |
| 1324 | struct scsi_mode_parameter_header_10 *data, int len, int flags, int retries, |
| 1325 | int timeout) |
| 1326 | { |
| 1327 | struct scsi_mode_select_10 cmd; |
| 1328 | |
| 1329 | memset(&cmd, 0, sizeof(cmd)); |
| 1330 | cmd.opcode = SCSI_MODE_SELECT_10; |
| 1331 | cmd.byte2 = byte2; |
| 1332 | _lto2b(len, cmd.length); |
| 1333 | |
| 1334 | return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 1335 | (void *)data, len, retries, timeout, NULL, flags | XS_CTL_DATA_OUT)); |
| 1336 | } |
| 1337 | |
| 1338 | /* |
| 1339 | * scsipi_done: |
| 1340 | * |
| 1341 | * This routine is called by an adapter's interrupt handler when |
| 1342 | * an xfer is completed. |
| 1343 | */ |
| 1344 | void |
| 1345 | scsipi_done(struct scsipi_xfer *xs) |
| 1346 | { |
| 1347 | struct scsipi_periph *periph = xs->xs_periph; |
| 1348 | struct scsipi_channel *chan = periph->periph_channel; |
| 1349 | int freezecnt; |
| 1350 | |
| 1351 | SC_DEBUG(periph, SCSIPI_DB2, ("scsipi_done\n" )); |
| 1352 | #ifdef SCSIPI_DEBUG |
| 1353 | if (periph->periph_dbflags & SCSIPI_DB1) |
| 1354 | show_scsipi_cmd(xs); |
| 1355 | #endif |
| 1356 | |
| 1357 | mutex_enter(chan_mtx(chan)); |
| 1358 | /* |
| 1359 | * The resource this command was using is now free. |
| 1360 | */ |
| 1361 | if (xs->xs_status & XS_STS_DONE) { |
| 1362 | /* XXX in certain circumstances, such as a device |
| 1363 | * being detached, a xs that has already been |
| 1364 | * scsipi_done()'d by the main thread will be done'd |
| 1365 | * again by scsibusdetach(). Putting the xs on the |
| 1366 | * chan_complete queue causes list corruption and |
| 1367 | * everyone dies. This prevents that, but perhaps |
| 1368 | * there should be better coordination somewhere such |
| 1369 | * that this won't ever happen (and can be turned into |
| 1370 | * a KASSERT(). |
| 1371 | */ |
| 1372 | mutex_exit(chan_mtx(chan)); |
| 1373 | goto out; |
| 1374 | } |
| 1375 | scsipi_put_resource(chan); |
| 1376 | xs->xs_periph->periph_sent--; |
| 1377 | |
| 1378 | /* |
| 1379 | * If the command was tagged, free the tag. |
| 1380 | */ |
| 1381 | if (XS_CTL_TAGTYPE(xs) != 0) |
| 1382 | scsipi_put_tag(xs); |
| 1383 | else |
| 1384 | periph->periph_flags &= ~PERIPH_UNTAG; |
| 1385 | |
| 1386 | /* Mark the command as `done'. */ |
| 1387 | xs->xs_status |= XS_STS_DONE; |
| 1388 | |
| 1389 | #ifdef DIAGNOSTIC |
| 1390 | if ((xs->xs_control & (XS_CTL_ASYNC|XS_CTL_POLL)) == |
| 1391 | (XS_CTL_ASYNC|XS_CTL_POLL)) |
| 1392 | panic("scsipi_done: ASYNC and POLL" ); |
| 1393 | #endif |
| 1394 | |
| 1395 | /* |
| 1396 | * If the xfer had an error of any sort, freeze the |
| 1397 | * periph's queue. Freeze it again if we were requested |
| 1398 | * to do so in the xfer. |
| 1399 | */ |
| 1400 | freezecnt = 0; |
| 1401 | if (xs->error != XS_NOERROR) |
| 1402 | freezecnt++; |
| 1403 | if (xs->xs_control & XS_CTL_FREEZE_PERIPH) |
| 1404 | freezecnt++; |
| 1405 | if (freezecnt != 0) |
| 1406 | scsipi_periph_freeze_locked(periph, freezecnt); |
| 1407 | |
| 1408 | /* |
| 1409 | * record the xfer with a pending sense, in case a SCSI reset is |
| 1410 | * received before the thread is waked up. |
| 1411 | */ |
| 1412 | if (xs->error == XS_BUSY && xs->status == SCSI_CHECK) { |
| 1413 | periph->periph_flags |= PERIPH_SENSE; |
| 1414 | periph->periph_xscheck = xs; |
| 1415 | } |
| 1416 | |
| 1417 | /* |
| 1418 | * If this was an xfer that was not to complete asynchronously, |
| 1419 | * let the requesting thread perform error checking/handling |
| 1420 | * in its context. |
| 1421 | */ |
| 1422 | if ((xs->xs_control & XS_CTL_ASYNC) == 0) { |
| 1423 | /* |
| 1424 | * If it's a polling job, just return, to unwind the |
| 1425 | * call graph. We don't need to restart the queue, |
| 1426 | * because pollings jobs are treated specially, and |
| 1427 | * are really only used during crash dumps anyway |
| 1428 | * (XXX or during boot-time autconfiguration of |
| 1429 | * ATAPI devices). |
| 1430 | */ |
| 1431 | if (xs->xs_control & XS_CTL_POLL) { |
| 1432 | mutex_exit(chan_mtx(chan)); |
| 1433 | return; |
| 1434 | } |
| 1435 | cv_broadcast(xs_cv(xs)); |
| 1436 | mutex_exit(chan_mtx(chan)); |
| 1437 | goto out; |
| 1438 | } |
| 1439 | |
| 1440 | /* |
| 1441 | * Catch the extremely common case of I/O completing |
| 1442 | * without error; no use in taking a context switch |
| 1443 | * if we can handle it in interrupt context. |
| 1444 | */ |
| 1445 | if (xs->error == XS_NOERROR) { |
| 1446 | mutex_exit(chan_mtx(chan)); |
| 1447 | (void) scsipi_complete(xs); |
| 1448 | goto out; |
| 1449 | } |
| 1450 | |
| 1451 | /* |
| 1452 | * There is an error on this xfer. Put it on the channel's |
| 1453 | * completion queue, and wake up the completion thread. |
| 1454 | */ |
| 1455 | TAILQ_INSERT_TAIL(&chan->chan_complete, xs, channel_q); |
| 1456 | mutex_exit(chan_mtx(chan)); |
| 1457 | cv_broadcast(chan_cv_complete(chan)); |
| 1458 | |
| 1459 | out: |
| 1460 | /* |
| 1461 | * If there are more xfers on the channel's queue, attempt to |
| 1462 | * run them. |
| 1463 | */ |
| 1464 | scsipi_run_queue(chan); |
| 1465 | } |
| 1466 | |
| 1467 | /* |
| 1468 | * scsipi_complete: |
| 1469 | * |
| 1470 | * Completion of a scsipi_xfer. This is the guts of scsipi_done(). |
| 1471 | * |
| 1472 | * NOTE: This routine MUST be called with valid thread context |
| 1473 | * except for the case where the following two conditions are |
| 1474 | * true: |
| 1475 | * |
| 1476 | * xs->error == XS_NOERROR |
| 1477 | * XS_CTL_ASYNC is set in xs->xs_control |
| 1478 | * |
| 1479 | * The semantics of this routine can be tricky, so here is an |
| 1480 | * explanation: |
| 1481 | * |
| 1482 | * 0 Xfer completed successfully. |
| 1483 | * |
| 1484 | * ERESTART Xfer had an error, but was restarted. |
| 1485 | * |
| 1486 | * anything else Xfer had an error, return value is Unix |
| 1487 | * errno. |
| 1488 | * |
| 1489 | * If the return value is anything but ERESTART: |
| 1490 | * |
| 1491 | * - If XS_CTL_ASYNC is set, `xs' has been freed back to |
| 1492 | * the pool. |
| 1493 | * - If there is a buf associated with the xfer, |
| 1494 | * it has been biodone()'d. |
| 1495 | */ |
| 1496 | static int |
| 1497 | scsipi_complete(struct scsipi_xfer *xs) |
| 1498 | { |
| 1499 | struct scsipi_periph *periph = xs->xs_periph; |
| 1500 | struct scsipi_channel *chan = periph->periph_channel; |
| 1501 | int error; |
| 1502 | |
| 1503 | #ifdef DIAGNOSTIC |
| 1504 | if ((xs->xs_control & XS_CTL_ASYNC) != 0 && xs->bp == NULL) |
| 1505 | panic("scsipi_complete: XS_CTL_ASYNC but no buf" ); |
| 1506 | #endif |
| 1507 | /* |
| 1508 | * If command terminated with a CHECK CONDITION, we need to issue a |
| 1509 | * REQUEST_SENSE command. Once the REQUEST_SENSE has been processed |
| 1510 | * we'll have the real status. |
| 1511 | * Must be processed with channel lock held to avoid missing |
| 1512 | * a SCSI bus reset for this command. |
| 1513 | */ |
| 1514 | mutex_enter(chan_mtx(chan)); |
| 1515 | if (xs->error == XS_BUSY && xs->status == SCSI_CHECK) { |
| 1516 | /* request sense for a request sense ? */ |
| 1517 | if (xs->xs_control & XS_CTL_REQSENSE) { |
| 1518 | scsipi_printaddr(periph); |
| 1519 | printf("request sense for a request sense ?\n" ); |
| 1520 | /* XXX maybe we should reset the device ? */ |
| 1521 | /* we've been frozen because xs->error != XS_NOERROR */ |
| 1522 | scsipi_periph_thaw_locked(periph, 1); |
| 1523 | mutex_exit(chan_mtx(chan)); |
| 1524 | if (xs->resid < xs->datalen) { |
| 1525 | printf("we read %d bytes of sense anyway:\n" , |
| 1526 | xs->datalen - xs->resid); |
| 1527 | scsipi_print_sense_data((void *)xs->data, 0); |
| 1528 | } |
| 1529 | return EINVAL; |
| 1530 | } |
| 1531 | mutex_exit(chan_mtx(chan)); // XXX allows other commands to queue or run |
| 1532 | scsipi_request_sense(xs); |
| 1533 | } else |
| 1534 | mutex_exit(chan_mtx(chan)); |
| 1535 | |
| 1536 | /* |
| 1537 | * If it's a user level request, bypass all usual completion |
| 1538 | * processing, let the user work it out.. |
| 1539 | */ |
| 1540 | if ((xs->xs_control & XS_CTL_USERCMD) != 0) { |
| 1541 | SC_DEBUG(periph, SCSIPI_DB3, ("calling user done()\n" )); |
| 1542 | mutex_enter(chan_mtx(chan)); |
| 1543 | if (xs->error != XS_NOERROR) |
| 1544 | scsipi_periph_thaw_locked(periph, 1); |
| 1545 | mutex_exit(chan_mtx(chan)); |
| 1546 | scsipi_user_done(xs); |
| 1547 | SC_DEBUG(periph, SCSIPI_DB3, ("returned from user done()\n " )); |
| 1548 | return 0; |
| 1549 | } |
| 1550 | |
| 1551 | switch (xs->error) { |
| 1552 | case XS_NOERROR: |
| 1553 | error = 0; |
| 1554 | break; |
| 1555 | |
| 1556 | case XS_SENSE: |
| 1557 | case XS_SHORTSENSE: |
| 1558 | error = (*chan->chan_bustype->bustype_interpret_sense)(xs); |
| 1559 | break; |
| 1560 | |
| 1561 | case XS_RESOURCE_SHORTAGE: |
| 1562 | /* |
| 1563 | * XXX Should freeze channel's queue. |
| 1564 | */ |
| 1565 | scsipi_printaddr(periph); |
| 1566 | printf("adapter resource shortage\n" ); |
| 1567 | /* FALLTHROUGH */ |
| 1568 | |
| 1569 | case XS_BUSY: |
| 1570 | if (xs->error == XS_BUSY && xs->status == SCSI_QUEUE_FULL) { |
| 1571 | struct scsipi_max_openings mo; |
| 1572 | |
| 1573 | /* |
| 1574 | * We set the openings to active - 1, assuming that |
| 1575 | * the command that got us here is the first one that |
| 1576 | * can't fit into the device's queue. If that's not |
| 1577 | * the case, I guess we'll find out soon enough. |
| 1578 | */ |
| 1579 | mo.mo_target = periph->periph_target; |
| 1580 | mo.mo_lun = periph->periph_lun; |
| 1581 | if (periph->periph_active < periph->periph_openings) |
| 1582 | mo.mo_openings = periph->periph_active - 1; |
| 1583 | else |
| 1584 | mo.mo_openings = periph->periph_openings - 1; |
| 1585 | #ifdef DIAGNOSTIC |
| 1586 | if (mo.mo_openings < 0) { |
| 1587 | scsipi_printaddr(periph); |
| 1588 | printf("QUEUE FULL resulted in < 0 openings\n" ); |
| 1589 | panic("scsipi_done" ); |
| 1590 | } |
| 1591 | #endif |
| 1592 | if (mo.mo_openings == 0) { |
| 1593 | scsipi_printaddr(periph); |
| 1594 | printf("QUEUE FULL resulted in 0 openings\n" ); |
| 1595 | mo.mo_openings = 1; |
| 1596 | } |
| 1597 | scsipi_async_event(chan, ASYNC_EVENT_MAX_OPENINGS, &mo); |
| 1598 | error = ERESTART; |
| 1599 | } else if (xs->xs_retries != 0) { |
| 1600 | xs->xs_retries--; |
| 1601 | /* |
| 1602 | * Wait one second, and try again. |
| 1603 | */ |
| 1604 | mutex_enter(chan_mtx(chan)); |
| 1605 | if ((xs->xs_control & XS_CTL_POLL) || |
| 1606 | (chan->chan_flags & SCSIPI_CHAN_TACTIVE) == 0) { |
| 1607 | /* XXX: quite extreme */ |
| 1608 | kpause("xsbusy" , false, hz, chan_mtx(chan)); |
| 1609 | } else if (!callout_pending(&periph->periph_callout)) { |
| 1610 | scsipi_periph_freeze_locked(periph, 1); |
| 1611 | callout_reset(&periph->periph_callout, |
| 1612 | hz, scsipi_periph_timed_thaw, periph); |
| 1613 | } |
| 1614 | mutex_exit(chan_mtx(chan)); |
| 1615 | error = ERESTART; |
| 1616 | } else |
| 1617 | error = EBUSY; |
| 1618 | break; |
| 1619 | |
| 1620 | case XS_REQUEUE: |
| 1621 | error = ERESTART; |
| 1622 | break; |
| 1623 | |
| 1624 | case XS_SELTIMEOUT: |
| 1625 | case XS_TIMEOUT: |
| 1626 | /* |
| 1627 | * If the device hasn't gone away, honor retry counts. |
| 1628 | * |
| 1629 | * Note that if we're in the middle of probing it, |
| 1630 | * it won't be found because it isn't here yet so |
| 1631 | * we won't honor the retry count in that case. |
| 1632 | */ |
| 1633 | if (scsipi_lookup_periph(chan, periph->periph_target, |
| 1634 | periph->periph_lun) && xs->xs_retries != 0) { |
| 1635 | xs->xs_retries--; |
| 1636 | error = ERESTART; |
| 1637 | } else |
| 1638 | error = EIO; |
| 1639 | break; |
| 1640 | |
| 1641 | case XS_RESET: |
| 1642 | if (xs->xs_control & XS_CTL_REQSENSE) { |
| 1643 | /* |
| 1644 | * request sense interrupted by reset: signal it |
| 1645 | * with EINTR return code. |
| 1646 | */ |
| 1647 | error = EINTR; |
| 1648 | } else { |
| 1649 | if (xs->xs_retries != 0) { |
| 1650 | xs->xs_retries--; |
| 1651 | error = ERESTART; |
| 1652 | } else |
| 1653 | error = EIO; |
| 1654 | } |
| 1655 | break; |
| 1656 | |
| 1657 | case XS_DRIVER_STUFFUP: |
| 1658 | scsipi_printaddr(periph); |
| 1659 | printf("generic HBA error\n" ); |
| 1660 | error = EIO; |
| 1661 | break; |
| 1662 | default: |
| 1663 | scsipi_printaddr(periph); |
| 1664 | printf("invalid return code from adapter: %d\n" , xs->error); |
| 1665 | error = EIO; |
| 1666 | break; |
| 1667 | } |
| 1668 | |
| 1669 | mutex_enter(chan_mtx(chan)); |
| 1670 | if (error == ERESTART) { |
| 1671 | /* |
| 1672 | * If we get here, the periph has been thawed and frozen |
| 1673 | * again if we had to issue recovery commands. Alternatively, |
| 1674 | * it may have been frozen again and in a timed thaw. In |
| 1675 | * any case, we thaw the periph once we re-enqueue the |
| 1676 | * command. Once the periph is fully thawed, it will begin |
| 1677 | * operation again. |
| 1678 | */ |
| 1679 | xs->error = XS_NOERROR; |
| 1680 | xs->status = SCSI_OK; |
| 1681 | xs->xs_status &= ~XS_STS_DONE; |
| 1682 | xs->xs_requeuecnt++; |
| 1683 | error = scsipi_enqueue(xs); |
| 1684 | if (error == 0) { |
| 1685 | scsipi_periph_thaw_locked(periph, 1); |
| 1686 | mutex_exit(chan_mtx(chan)); |
| 1687 | return (ERESTART); |
| 1688 | } |
| 1689 | } |
| 1690 | |
| 1691 | /* |
| 1692 | * scsipi_done() freezes the queue if not XS_NOERROR. |
| 1693 | * Thaw it here. |
| 1694 | */ |
| 1695 | if (xs->error != XS_NOERROR) |
| 1696 | scsipi_periph_thaw_locked(periph, 1); |
| 1697 | mutex_exit(chan_mtx(chan)); |
| 1698 | |
| 1699 | if (periph->periph_switch->psw_done) |
| 1700 | periph->periph_switch->psw_done(xs, error); |
| 1701 | |
| 1702 | mutex_enter(chan_mtx(chan)); |
| 1703 | if (xs->xs_control & XS_CTL_ASYNC) |
| 1704 | scsipi_put_xs(xs); |
| 1705 | mutex_exit(chan_mtx(chan)); |
| 1706 | |
| 1707 | return (error); |
| 1708 | } |
| 1709 | |
| 1710 | /* |
| 1711 | * Issue a request sense for the given scsipi_xfer. Called when the xfer |
| 1712 | * returns with a CHECK_CONDITION status. Must be called in valid thread |
| 1713 | * context and with channel lock held. |
| 1714 | */ |
| 1715 | |
| 1716 | static void |
| 1717 | scsipi_request_sense(struct scsipi_xfer *xs) |
| 1718 | { |
| 1719 | struct scsipi_periph *periph = xs->xs_periph; |
| 1720 | int flags, error; |
| 1721 | struct scsi_request_sense cmd; |
| 1722 | |
| 1723 | periph->periph_flags |= PERIPH_SENSE; |
| 1724 | |
| 1725 | /* if command was polling, request sense will too */ |
| 1726 | flags = xs->xs_control & XS_CTL_POLL; |
| 1727 | /* Polling commands can't sleep */ |
| 1728 | if (flags) |
| 1729 | flags |= XS_CTL_NOSLEEP; |
| 1730 | |
| 1731 | flags |= XS_CTL_REQSENSE | XS_CTL_URGENT | XS_CTL_DATA_IN | |
| 1732 | XS_CTL_THAW_PERIPH | XS_CTL_FREEZE_PERIPH; |
| 1733 | |
| 1734 | memset(&cmd, 0, sizeof(cmd)); |
| 1735 | cmd.opcode = SCSI_REQUEST_SENSE; |
| 1736 | cmd.length = sizeof(struct scsi_sense_data); |
| 1737 | |
| 1738 | error = scsipi_command(periph, (void *)&cmd, sizeof(cmd), |
| 1739 | (void *)&xs->sense.scsi_sense, sizeof(struct scsi_sense_data), |
| 1740 | 0, 1000, NULL, flags); |
| 1741 | periph->periph_flags &= ~PERIPH_SENSE; |
| 1742 | periph->periph_xscheck = NULL; |
| 1743 | switch (error) { |
| 1744 | case 0: |
| 1745 | /* we have a valid sense */ |
| 1746 | xs->error = XS_SENSE; |
| 1747 | return; |
| 1748 | case EINTR: |
| 1749 | /* REQUEST_SENSE interrupted by bus reset. */ |
| 1750 | xs->error = XS_RESET; |
| 1751 | return; |
| 1752 | case EIO: |
| 1753 | /* request sense coudn't be performed */ |
| 1754 | /* |
| 1755 | * XXX this isn't quite right but we don't have anything |
| 1756 | * better for now |
| 1757 | */ |
| 1758 | xs->error = XS_DRIVER_STUFFUP; |
| 1759 | return; |
| 1760 | default: |
| 1761 | /* Notify that request sense failed. */ |
| 1762 | xs->error = XS_DRIVER_STUFFUP; |
| 1763 | scsipi_printaddr(periph); |
| 1764 | printf("request sense failed with error %d\n" , error); |
| 1765 | return; |
| 1766 | } |
| 1767 | } |
| 1768 | |
| 1769 | /* |
| 1770 | * scsipi_enqueue: |
| 1771 | * |
| 1772 | * Enqueue an xfer on a channel. |
| 1773 | */ |
| 1774 | static int |
| 1775 | scsipi_enqueue(struct scsipi_xfer *xs) |
| 1776 | { |
| 1777 | struct scsipi_channel *chan = xs->xs_periph->periph_channel; |
| 1778 | struct scsipi_xfer *qxs; |
| 1779 | |
| 1780 | /* |
| 1781 | * If the xfer is to be polled, and there are already jobs on |
| 1782 | * the queue, we can't proceed. |
| 1783 | */ |
| 1784 | if ((xs->xs_control & XS_CTL_POLL) != 0 && |
| 1785 | TAILQ_FIRST(&chan->chan_queue) != NULL) { |
| 1786 | xs->error = XS_DRIVER_STUFFUP; |
| 1787 | return (EAGAIN); |
| 1788 | } |
| 1789 | |
| 1790 | /* |
| 1791 | * If we have an URGENT xfer, it's an error recovery command |
| 1792 | * and it should just go on the head of the channel's queue. |
| 1793 | */ |
| 1794 | if (xs->xs_control & XS_CTL_URGENT) { |
| 1795 | TAILQ_INSERT_HEAD(&chan->chan_queue, xs, channel_q); |
| 1796 | goto out; |
| 1797 | } |
| 1798 | |
| 1799 | /* |
| 1800 | * If this xfer has already been on the queue before, we |
| 1801 | * need to reinsert it in the correct order. That order is: |
| 1802 | * |
| 1803 | * Immediately before the first xfer for this periph |
| 1804 | * with a requeuecnt less than xs->xs_requeuecnt. |
| 1805 | * |
| 1806 | * Failing that, at the end of the queue. (We'll end up |
| 1807 | * there naturally.) |
| 1808 | */ |
| 1809 | if (xs->xs_requeuecnt != 0) { |
| 1810 | for (qxs = TAILQ_FIRST(&chan->chan_queue); qxs != NULL; |
| 1811 | qxs = TAILQ_NEXT(qxs, channel_q)) { |
| 1812 | if (qxs->xs_periph == xs->xs_periph && |
| 1813 | qxs->xs_requeuecnt < xs->xs_requeuecnt) |
| 1814 | break; |
| 1815 | } |
| 1816 | if (qxs != NULL) { |
| 1817 | TAILQ_INSERT_AFTER(&chan->chan_queue, qxs, xs, |
| 1818 | channel_q); |
| 1819 | goto out; |
| 1820 | } |
| 1821 | } |
| 1822 | TAILQ_INSERT_TAIL(&chan->chan_queue, xs, channel_q); |
| 1823 | out: |
| 1824 | if (xs->xs_control & XS_CTL_THAW_PERIPH) |
| 1825 | scsipi_periph_thaw_locked(xs->xs_periph, 1); |
| 1826 | return (0); |
| 1827 | } |
| 1828 | |
| 1829 | /* |
| 1830 | * scsipi_run_queue: |
| 1831 | * |
| 1832 | * Start as many xfers as possible running on the channel. |
| 1833 | */ |
| 1834 | static void |
| 1835 | scsipi_run_queue(struct scsipi_channel *chan) |
| 1836 | { |
| 1837 | struct scsipi_xfer *xs; |
| 1838 | struct scsipi_periph *periph; |
| 1839 | |
| 1840 | for (;;) { |
| 1841 | mutex_enter(chan_mtx(chan)); |
| 1842 | |
| 1843 | /* |
| 1844 | * If the channel is frozen, we can't do any work right |
| 1845 | * now. |
| 1846 | */ |
| 1847 | if (chan->chan_qfreeze != 0) { |
| 1848 | mutex_exit(chan_mtx(chan)); |
| 1849 | return; |
| 1850 | } |
| 1851 | |
| 1852 | /* |
| 1853 | * Look for work to do, and make sure we can do it. |
| 1854 | */ |
| 1855 | for (xs = TAILQ_FIRST(&chan->chan_queue); xs != NULL; |
| 1856 | xs = TAILQ_NEXT(xs, channel_q)) { |
| 1857 | periph = xs->xs_periph; |
| 1858 | |
| 1859 | if ((periph->periph_sent >= periph->periph_openings) || |
| 1860 | periph->periph_qfreeze != 0 || |
| 1861 | (periph->periph_flags & PERIPH_UNTAG) != 0) |
| 1862 | continue; |
| 1863 | |
| 1864 | if ((periph->periph_flags & |
| 1865 | (PERIPH_RECOVERING | PERIPH_SENSE)) != 0 && |
| 1866 | (xs->xs_control & XS_CTL_URGENT) == 0) |
| 1867 | continue; |
| 1868 | |
| 1869 | /* |
| 1870 | * We can issue this xfer! |
| 1871 | */ |
| 1872 | goto got_one; |
| 1873 | } |
| 1874 | |
| 1875 | /* |
| 1876 | * Can't find any work to do right now. |
| 1877 | */ |
| 1878 | mutex_exit(chan_mtx(chan)); |
| 1879 | return; |
| 1880 | |
| 1881 | got_one: |
| 1882 | /* |
| 1883 | * Have an xfer to run. Allocate a resource from |
| 1884 | * the adapter to run it. If we can't allocate that |
| 1885 | * resource, we don't dequeue the xfer. |
| 1886 | */ |
| 1887 | if (scsipi_get_resource(chan) == 0) { |
| 1888 | /* |
| 1889 | * Adapter is out of resources. If the adapter |
| 1890 | * supports it, attempt to grow them. |
| 1891 | */ |
| 1892 | if (scsipi_grow_resources(chan) == 0) { |
| 1893 | /* |
| 1894 | * Wasn't able to grow resources, |
| 1895 | * nothing more we can do. |
| 1896 | */ |
| 1897 | if (xs->xs_control & XS_CTL_POLL) { |
| 1898 | scsipi_printaddr(xs->xs_periph); |
| 1899 | printf("polling command but no " |
| 1900 | "adapter resources" ); |
| 1901 | /* We'll panic shortly... */ |
| 1902 | } |
| 1903 | mutex_exit(chan_mtx(chan)); |
| 1904 | |
| 1905 | /* |
| 1906 | * XXX: We should be able to note that |
| 1907 | * XXX: that resources are needed here! |
| 1908 | */ |
| 1909 | return; |
| 1910 | } |
| 1911 | /* |
| 1912 | * scsipi_grow_resources() allocated the resource |
| 1913 | * for us. |
| 1914 | */ |
| 1915 | } |
| 1916 | |
| 1917 | /* |
| 1918 | * We have a resource to run this xfer, do it! |
| 1919 | */ |
| 1920 | TAILQ_REMOVE(&chan->chan_queue, xs, channel_q); |
| 1921 | |
| 1922 | /* |
| 1923 | * If the command is to be tagged, allocate a tag ID |
| 1924 | * for it. |
| 1925 | */ |
| 1926 | if (XS_CTL_TAGTYPE(xs) != 0) |
| 1927 | scsipi_get_tag(xs); |
| 1928 | else |
| 1929 | periph->periph_flags |= PERIPH_UNTAG; |
| 1930 | periph->periph_sent++; |
| 1931 | mutex_exit(chan_mtx(chan)); |
| 1932 | |
| 1933 | scsipi_adapter_request(chan, ADAPTER_REQ_RUN_XFER, xs); |
| 1934 | } |
| 1935 | #ifdef DIAGNOSTIC |
| 1936 | panic("scsipi_run_queue: impossible" ); |
| 1937 | #endif |
| 1938 | } |
| 1939 | |
| 1940 | /* |
| 1941 | * scsipi_execute_xs: |
| 1942 | * |
| 1943 | * Begin execution of an xfer, waiting for it to complete, if necessary. |
| 1944 | */ |
| 1945 | int |
| 1946 | scsipi_execute_xs(struct scsipi_xfer *xs) |
| 1947 | { |
| 1948 | struct scsipi_periph *periph = xs->xs_periph; |
| 1949 | struct scsipi_channel *chan = periph->periph_channel; |
| 1950 | int oasync, async, poll, error; |
| 1951 | |
| 1952 | KASSERT(!cold); |
| 1953 | |
| 1954 | (chan->chan_bustype->bustype_cmd)(xs); |
| 1955 | |
| 1956 | xs->xs_status &= ~XS_STS_DONE; |
| 1957 | xs->error = XS_NOERROR; |
| 1958 | xs->resid = xs->datalen; |
| 1959 | xs->status = SCSI_OK; |
| 1960 | |
| 1961 | #ifdef SCSIPI_DEBUG |
| 1962 | if (xs->xs_periph->periph_dbflags & SCSIPI_DB3) { |
| 1963 | printf("scsipi_execute_xs: " ); |
| 1964 | show_scsipi_xs(xs); |
| 1965 | printf("\n" ); |
| 1966 | } |
| 1967 | #endif |
| 1968 | |
| 1969 | /* |
| 1970 | * Deal with command tagging: |
| 1971 | * |
| 1972 | * - If the device's current operating mode doesn't |
| 1973 | * include tagged queueing, clear the tag mask. |
| 1974 | * |
| 1975 | * - If the device's current operating mode *does* |
| 1976 | * include tagged queueing, set the tag_type in |
| 1977 | * the xfer to the appropriate byte for the tag |
| 1978 | * message. |
| 1979 | */ |
| 1980 | if ((PERIPH_XFER_MODE(periph) & PERIPH_CAP_TQING) == 0 || |
| 1981 | (xs->xs_control & XS_CTL_REQSENSE)) { |
| 1982 | xs->xs_control &= ~XS_CTL_TAGMASK; |
| 1983 | xs->xs_tag_type = 0; |
| 1984 | } else { |
| 1985 | /* |
| 1986 | * If the request doesn't specify a tag, give Head |
| 1987 | * tags to URGENT operations and Simple tags to |
| 1988 | * everything else. |
| 1989 | */ |
| 1990 | if (XS_CTL_TAGTYPE(xs) == 0) { |
| 1991 | if (xs->xs_control & XS_CTL_URGENT) |
| 1992 | xs->xs_control |= XS_CTL_HEAD_TAG; |
| 1993 | else |
| 1994 | xs->xs_control |= XS_CTL_SIMPLE_TAG; |
| 1995 | } |
| 1996 | |
| 1997 | switch (XS_CTL_TAGTYPE(xs)) { |
| 1998 | case XS_CTL_ORDERED_TAG: |
| 1999 | xs->xs_tag_type = MSG_ORDERED_Q_TAG; |
| 2000 | break; |
| 2001 | |
| 2002 | case XS_CTL_SIMPLE_TAG: |
| 2003 | xs->xs_tag_type = MSG_SIMPLE_Q_TAG; |
| 2004 | break; |
| 2005 | |
| 2006 | case XS_CTL_HEAD_TAG: |
| 2007 | xs->xs_tag_type = MSG_HEAD_OF_Q_TAG; |
| 2008 | break; |
| 2009 | |
| 2010 | default: |
| 2011 | scsipi_printaddr(periph); |
| 2012 | printf("invalid tag mask 0x%08x\n" , |
| 2013 | XS_CTL_TAGTYPE(xs)); |
| 2014 | panic("scsipi_execute_xs" ); |
| 2015 | } |
| 2016 | } |
| 2017 | |
| 2018 | /* If the adaptor wants us to poll, poll. */ |
| 2019 | if (chan->chan_adapter->adapt_flags & SCSIPI_ADAPT_POLL_ONLY) |
| 2020 | xs->xs_control |= XS_CTL_POLL; |
| 2021 | |
| 2022 | /* |
| 2023 | * If we don't yet have a completion thread, or we are to poll for |
| 2024 | * completion, clear the ASYNC flag. |
| 2025 | */ |
| 2026 | oasync = (xs->xs_control & XS_CTL_ASYNC); |
| 2027 | if (chan->chan_thread == NULL || (xs->xs_control & XS_CTL_POLL) != 0) |
| 2028 | xs->xs_control &= ~XS_CTL_ASYNC; |
| 2029 | |
| 2030 | async = (xs->xs_control & XS_CTL_ASYNC); |
| 2031 | poll = (xs->xs_control & XS_CTL_POLL); |
| 2032 | |
| 2033 | #ifdef DIAGNOSTIC |
| 2034 | if (oasync != 0 && xs->bp == NULL) |
| 2035 | panic("scsipi_execute_xs: XS_CTL_ASYNC but no buf" ); |
| 2036 | #endif |
| 2037 | |
| 2038 | /* |
| 2039 | * Enqueue the transfer. If we're not polling for completion, this |
| 2040 | * should ALWAYS return `no error'. |
| 2041 | */ |
| 2042 | error = scsipi_enqueue(xs); |
| 2043 | if (error) { |
| 2044 | if (poll == 0) { |
| 2045 | scsipi_printaddr(periph); |
| 2046 | printf("not polling, but enqueue failed with %d\n" , |
| 2047 | error); |
| 2048 | panic("scsipi_execute_xs" ); |
| 2049 | } |
| 2050 | |
| 2051 | scsipi_printaddr(periph); |
| 2052 | printf("should have flushed queue?\n" ); |
| 2053 | goto free_xs; |
| 2054 | } |
| 2055 | |
| 2056 | mutex_exit(chan_mtx(chan)); |
| 2057 | restarted: |
| 2058 | scsipi_run_queue(chan); |
| 2059 | mutex_enter(chan_mtx(chan)); |
| 2060 | |
| 2061 | /* |
| 2062 | * The xfer is enqueued, and possibly running. If it's to be |
| 2063 | * completed asynchronously, just return now. |
| 2064 | */ |
| 2065 | if (async) |
| 2066 | return (0); |
| 2067 | |
| 2068 | /* |
| 2069 | * Not an asynchronous command; wait for it to complete. |
| 2070 | */ |
| 2071 | while ((xs->xs_status & XS_STS_DONE) == 0) { |
| 2072 | if (poll) { |
| 2073 | scsipi_printaddr(periph); |
| 2074 | printf("polling command not done\n" ); |
| 2075 | panic("scsipi_execute_xs" ); |
| 2076 | } |
| 2077 | cv_wait(xs_cv(xs), chan_mtx(chan)); |
| 2078 | } |
| 2079 | |
| 2080 | /* |
| 2081 | * Command is complete. scsipi_done() has awakened us to perform |
| 2082 | * the error handling. |
| 2083 | */ |
| 2084 | mutex_exit(chan_mtx(chan)); |
| 2085 | error = scsipi_complete(xs); |
| 2086 | if (error == ERESTART) |
| 2087 | goto restarted; |
| 2088 | |
| 2089 | /* |
| 2090 | * If it was meant to run async and we cleared aync ourselve, |
| 2091 | * don't return an error here. It has already been handled |
| 2092 | */ |
| 2093 | if (oasync) |
| 2094 | error = 0; |
| 2095 | /* |
| 2096 | * Command completed successfully or fatal error occurred. Fall |
| 2097 | * into.... |
| 2098 | */ |
| 2099 | mutex_enter(chan_mtx(chan)); |
| 2100 | free_xs: |
| 2101 | scsipi_put_xs(xs); |
| 2102 | mutex_exit(chan_mtx(chan)); |
| 2103 | |
| 2104 | /* |
| 2105 | * Kick the queue, keep it running in case it stopped for some |
| 2106 | * reason. |
| 2107 | */ |
| 2108 | scsipi_run_queue(chan); |
| 2109 | |
| 2110 | mutex_enter(chan_mtx(chan)); |
| 2111 | return (error); |
| 2112 | } |
| 2113 | |
| 2114 | /* |
| 2115 | * scsipi_completion_thread: |
| 2116 | * |
| 2117 | * This is the completion thread. We wait for errors on |
| 2118 | * asynchronous xfers, and perform the error handling |
| 2119 | * function, restarting the command, if necessary. |
| 2120 | */ |
| 2121 | static void |
| 2122 | scsipi_completion_thread(void *arg) |
| 2123 | { |
| 2124 | struct scsipi_channel *chan = arg; |
| 2125 | struct scsipi_xfer *xs; |
| 2126 | |
| 2127 | if (chan->chan_init_cb) |
| 2128 | (*chan->chan_init_cb)(chan, chan->chan_init_cb_arg); |
| 2129 | |
| 2130 | mutex_enter(chan_mtx(chan)); |
| 2131 | chan->chan_flags |= SCSIPI_CHAN_TACTIVE; |
| 2132 | mutex_exit(chan_mtx(chan)); |
| 2133 | for (;;) { |
| 2134 | mutex_enter(chan_mtx(chan)); |
| 2135 | xs = TAILQ_FIRST(&chan->chan_complete); |
| 2136 | if (xs == NULL && chan->chan_tflags == 0) { |
| 2137 | /* nothing to do; wait */ |
| 2138 | cv_wait(chan_cv_complete(chan), chan_mtx(chan)); |
| 2139 | mutex_exit(chan_mtx(chan)); |
| 2140 | continue; |
| 2141 | } |
| 2142 | if (chan->chan_tflags & SCSIPI_CHANT_CALLBACK) { |
| 2143 | /* call chan_callback from thread context */ |
| 2144 | chan->chan_tflags &= ~SCSIPI_CHANT_CALLBACK; |
| 2145 | chan->chan_callback(chan, chan->chan_callback_arg); |
| 2146 | mutex_exit(chan_mtx(chan)); |
| 2147 | continue; |
| 2148 | } |
| 2149 | if (chan->chan_tflags & SCSIPI_CHANT_GROWRES) { |
| 2150 | /* attempt to get more openings for this channel */ |
| 2151 | chan->chan_tflags &= ~SCSIPI_CHANT_GROWRES; |
| 2152 | mutex_exit(chan_mtx(chan)); |
| 2153 | scsipi_adapter_request(chan, |
| 2154 | ADAPTER_REQ_GROW_RESOURCES, NULL); |
| 2155 | scsipi_channel_thaw(chan, 1); |
| 2156 | if (chan->chan_tflags & SCSIPI_CHANT_GROWRES) |
| 2157 | kpause("scsizzz" , FALSE, hz/10, NULL); |
| 2158 | continue; |
| 2159 | } |
| 2160 | if (chan->chan_tflags & SCSIPI_CHANT_KICK) { |
| 2161 | /* explicitly run the queues for this channel */ |
| 2162 | chan->chan_tflags &= ~SCSIPI_CHANT_KICK; |
| 2163 | mutex_exit(chan_mtx(chan)); |
| 2164 | scsipi_run_queue(chan); |
| 2165 | continue; |
| 2166 | } |
| 2167 | if (chan->chan_tflags & SCSIPI_CHANT_SHUTDOWN) { |
| 2168 | mutex_exit(chan_mtx(chan)); |
| 2169 | break; |
| 2170 | } |
| 2171 | if (xs) { |
| 2172 | TAILQ_REMOVE(&chan->chan_complete, xs, channel_q); |
| 2173 | mutex_exit(chan_mtx(chan)); |
| 2174 | |
| 2175 | /* |
| 2176 | * Have an xfer with an error; process it. |
| 2177 | */ |
| 2178 | (void) scsipi_complete(xs); |
| 2179 | |
| 2180 | /* |
| 2181 | * Kick the queue; keep it running if it was stopped |
| 2182 | * for some reason. |
| 2183 | */ |
| 2184 | scsipi_run_queue(chan); |
| 2185 | } else { |
| 2186 | mutex_exit(chan_mtx(chan)); |
| 2187 | } |
| 2188 | } |
| 2189 | |
| 2190 | chan->chan_thread = NULL; |
| 2191 | |
| 2192 | /* In case parent is waiting for us to exit. */ |
| 2193 | cv_broadcast(chan_cv_thread(chan)); |
| 2194 | |
| 2195 | kthread_exit(0); |
| 2196 | } |
| 2197 | /* |
| 2198 | * scsipi_thread_call_callback: |
| 2199 | * |
| 2200 | * request to call a callback from the completion thread |
| 2201 | */ |
| 2202 | int |
| 2203 | scsipi_thread_call_callback(struct scsipi_channel *chan, |
| 2204 | void (*callback)(struct scsipi_channel *, void *), void *arg) |
| 2205 | { |
| 2206 | |
| 2207 | mutex_enter(chan_mtx(chan)); |
| 2208 | if ((chan->chan_flags & SCSIPI_CHAN_TACTIVE) == 0) { |
| 2209 | /* kernel thread doesn't exist yet */ |
| 2210 | mutex_exit(chan_mtx(chan)); |
| 2211 | return ESRCH; |
| 2212 | } |
| 2213 | if (chan->chan_tflags & SCSIPI_CHANT_CALLBACK) { |
| 2214 | mutex_exit(chan_mtx(chan)); |
| 2215 | return EBUSY; |
| 2216 | } |
| 2217 | scsipi_channel_freeze(chan, 1); |
| 2218 | chan->chan_callback = callback; |
| 2219 | chan->chan_callback_arg = arg; |
| 2220 | chan->chan_tflags |= SCSIPI_CHANT_CALLBACK; |
| 2221 | cv_broadcast(chan_cv_complete(chan)); |
| 2222 | mutex_exit(chan_mtx(chan)); |
| 2223 | return(0); |
| 2224 | } |
| 2225 | |
| 2226 | /* |
| 2227 | * scsipi_async_event: |
| 2228 | * |
| 2229 | * Handle an asynchronous event from an adapter. |
| 2230 | */ |
| 2231 | void |
| 2232 | scsipi_async_event(struct scsipi_channel *chan, scsipi_async_event_t event, |
| 2233 | void *arg) |
| 2234 | { |
| 2235 | |
| 2236 | mutex_enter(chan_mtx(chan)); |
| 2237 | switch (event) { |
| 2238 | case ASYNC_EVENT_MAX_OPENINGS: |
| 2239 | scsipi_async_event_max_openings(chan, |
| 2240 | (struct scsipi_max_openings *)arg); |
| 2241 | break; |
| 2242 | |
| 2243 | case ASYNC_EVENT_XFER_MODE: |
| 2244 | if (chan->chan_bustype->bustype_async_event_xfer_mode) { |
| 2245 | chan->chan_bustype->bustype_async_event_xfer_mode( |
| 2246 | chan, arg); |
| 2247 | } |
| 2248 | break; |
| 2249 | case ASYNC_EVENT_RESET: |
| 2250 | scsipi_async_event_channel_reset(chan); |
| 2251 | break; |
| 2252 | } |
| 2253 | mutex_exit(chan_mtx(chan)); |
| 2254 | } |
| 2255 | |
| 2256 | /* |
| 2257 | * scsipi_async_event_max_openings: |
| 2258 | * |
| 2259 | * Update the maximum number of outstanding commands a |
| 2260 | * device may have. |
| 2261 | */ |
| 2262 | static void |
| 2263 | scsipi_async_event_max_openings(struct scsipi_channel *chan, |
| 2264 | struct scsipi_max_openings *mo) |
| 2265 | { |
| 2266 | struct scsipi_periph *periph; |
| 2267 | int minlun, maxlun; |
| 2268 | |
| 2269 | if (mo->mo_lun == -1) { |
| 2270 | /* |
| 2271 | * Wildcarded; apply it to all LUNs. |
| 2272 | */ |
| 2273 | minlun = 0; |
| 2274 | maxlun = chan->chan_nluns - 1; |
| 2275 | } else |
| 2276 | minlun = maxlun = mo->mo_lun; |
| 2277 | |
| 2278 | /* XXX This could really suck with a large LUN space. */ |
| 2279 | for (; minlun <= maxlun; minlun++) { |
| 2280 | periph = scsipi_lookup_periph_locked(chan, mo->mo_target, minlun); |
| 2281 | if (periph == NULL) |
| 2282 | continue; |
| 2283 | |
| 2284 | if (mo->mo_openings < periph->periph_openings) |
| 2285 | periph->periph_openings = mo->mo_openings; |
| 2286 | else if (mo->mo_openings > periph->periph_openings && |
| 2287 | (periph->periph_flags & PERIPH_GROW_OPENINGS) != 0) |
| 2288 | periph->periph_openings = mo->mo_openings; |
| 2289 | } |
| 2290 | } |
| 2291 | |
| 2292 | /* |
| 2293 | * scsipi_set_xfer_mode: |
| 2294 | * |
| 2295 | * Set the xfer mode for the specified I_T Nexus. |
| 2296 | */ |
| 2297 | void |
| 2298 | scsipi_set_xfer_mode(struct scsipi_channel *chan, int target, int immed) |
| 2299 | { |
| 2300 | struct scsipi_xfer_mode xm; |
| 2301 | struct scsipi_periph *itperiph; |
| 2302 | int lun; |
| 2303 | |
| 2304 | /* |
| 2305 | * Go to the minimal xfer mode. |
| 2306 | */ |
| 2307 | xm.xm_target = target; |
| 2308 | xm.xm_mode = 0; |
| 2309 | xm.xm_period = 0; /* ignored */ |
| 2310 | xm.xm_offset = 0; /* ignored */ |
| 2311 | |
| 2312 | /* |
| 2313 | * Find the first LUN we know about on this I_T Nexus. |
| 2314 | */ |
| 2315 | for (itperiph = NULL, lun = 0; lun < chan->chan_nluns; lun++) { |
| 2316 | itperiph = scsipi_lookup_periph(chan, target, lun); |
| 2317 | if (itperiph != NULL) |
| 2318 | break; |
| 2319 | } |
| 2320 | if (itperiph != NULL) { |
| 2321 | xm.xm_mode = itperiph->periph_cap; |
| 2322 | /* |
| 2323 | * Now issue the request to the adapter. |
| 2324 | */ |
| 2325 | scsipi_adapter_request(chan, ADAPTER_REQ_SET_XFER_MODE, &xm); |
| 2326 | /* |
| 2327 | * If we want this to happen immediately, issue a dummy |
| 2328 | * command, since most adapters can't really negotiate unless |
| 2329 | * they're executing a job. |
| 2330 | */ |
| 2331 | if (immed != 0) { |
| 2332 | (void) scsipi_test_unit_ready(itperiph, |
| 2333 | XS_CTL_DISCOVERY | XS_CTL_IGNORE_ILLEGAL_REQUEST | |
| 2334 | XS_CTL_IGNORE_NOT_READY | |
| 2335 | XS_CTL_IGNORE_MEDIA_CHANGE); |
| 2336 | } |
| 2337 | } |
| 2338 | } |
| 2339 | |
| 2340 | /* |
| 2341 | * scsipi_channel_reset: |
| 2342 | * |
| 2343 | * handle scsi bus reset |
| 2344 | * called with channel lock held |
| 2345 | */ |
| 2346 | static void |
| 2347 | scsipi_async_event_channel_reset(struct scsipi_channel *chan) |
| 2348 | { |
| 2349 | struct scsipi_xfer *xs, *xs_next; |
| 2350 | struct scsipi_periph *periph; |
| 2351 | int target, lun; |
| 2352 | |
| 2353 | /* |
| 2354 | * Channel has been reset. Also mark as reset pending REQUEST_SENSE |
| 2355 | * commands; as the sense is not available any more. |
| 2356 | * can't call scsipi_done() from here, as the command has not been |
| 2357 | * sent to the adapter yet (this would corrupt accounting). |
| 2358 | */ |
| 2359 | |
| 2360 | for (xs = TAILQ_FIRST(&chan->chan_queue); xs != NULL; xs = xs_next) { |
| 2361 | xs_next = TAILQ_NEXT(xs, channel_q); |
| 2362 | if (xs->xs_control & XS_CTL_REQSENSE) { |
| 2363 | TAILQ_REMOVE(&chan->chan_queue, xs, channel_q); |
| 2364 | xs->error = XS_RESET; |
| 2365 | if ((xs->xs_control & XS_CTL_ASYNC) != 0) |
| 2366 | TAILQ_INSERT_TAIL(&chan->chan_complete, xs, |
| 2367 | channel_q); |
| 2368 | } |
| 2369 | } |
| 2370 | cv_broadcast(chan_cv_complete(chan)); |
| 2371 | /* Catch xs with pending sense which may not have a REQSENSE xs yet */ |
| 2372 | for (target = 0; target < chan->chan_ntargets; target++) { |
| 2373 | if (target == chan->chan_id) |
| 2374 | continue; |
| 2375 | for (lun = 0; lun < chan->chan_nluns; lun++) { |
| 2376 | periph = scsipi_lookup_periph_locked(chan, target, lun); |
| 2377 | if (periph) { |
| 2378 | xs = periph->periph_xscheck; |
| 2379 | if (xs) |
| 2380 | xs->error = XS_RESET; |
| 2381 | } |
| 2382 | } |
| 2383 | } |
| 2384 | } |
| 2385 | |
| 2386 | /* |
| 2387 | * scsipi_target_detach: |
| 2388 | * |
| 2389 | * detach all periph associated with a I_T |
| 2390 | * must be called from valid thread context |
| 2391 | */ |
| 2392 | int |
| 2393 | scsipi_target_detach(struct scsipi_channel *chan, int target, int lun, |
| 2394 | int flags) |
| 2395 | { |
| 2396 | struct scsipi_periph *periph; |
| 2397 | int ctarget, mintarget, maxtarget; |
| 2398 | int clun, minlun, maxlun; |
| 2399 | int error; |
| 2400 | |
| 2401 | if (target == -1) { |
| 2402 | mintarget = 0; |
| 2403 | maxtarget = chan->chan_ntargets; |
| 2404 | } else { |
| 2405 | if (target == chan->chan_id) |
| 2406 | return EINVAL; |
| 2407 | if (target < 0 || target >= chan->chan_ntargets) |
| 2408 | return EINVAL; |
| 2409 | mintarget = target; |
| 2410 | maxtarget = target + 1; |
| 2411 | } |
| 2412 | |
| 2413 | if (lun == -1) { |
| 2414 | minlun = 0; |
| 2415 | maxlun = chan->chan_nluns; |
| 2416 | } else { |
| 2417 | if (lun < 0 || lun >= chan->chan_nluns) |
| 2418 | return EINVAL; |
| 2419 | minlun = lun; |
| 2420 | maxlun = lun + 1; |
| 2421 | } |
| 2422 | |
| 2423 | for (ctarget = mintarget; ctarget < maxtarget; ctarget++) { |
| 2424 | if (ctarget == chan->chan_id) |
| 2425 | continue; |
| 2426 | |
| 2427 | for (clun = minlun; clun < maxlun; clun++) { |
| 2428 | periph = scsipi_lookup_periph(chan, ctarget, clun); |
| 2429 | if (periph == NULL) |
| 2430 | continue; |
| 2431 | error = config_detach(periph->periph_dev, flags); |
| 2432 | if (error) |
| 2433 | return (error); |
| 2434 | } |
| 2435 | } |
| 2436 | return(0); |
| 2437 | } |
| 2438 | |
| 2439 | /* |
| 2440 | * scsipi_adapter_addref: |
| 2441 | * |
| 2442 | * Add a reference to the adapter pointed to by the provided |
| 2443 | * link, enabling the adapter if necessary. |
| 2444 | */ |
| 2445 | int |
| 2446 | scsipi_adapter_addref(struct scsipi_adapter *adapt) |
| 2447 | { |
| 2448 | int error = 0; |
| 2449 | |
| 2450 | if (atomic_inc_uint_nv(&adapt->adapt_refcnt) == 1 |
| 2451 | && adapt->adapt_enable != NULL) { |
| 2452 | scsipi_adapter_lock(adapt); |
| 2453 | error = scsipi_adapter_enable(adapt, 1); |
| 2454 | scsipi_adapter_unlock(adapt); |
| 2455 | if (error) |
| 2456 | atomic_dec_uint(&adapt->adapt_refcnt); |
| 2457 | } |
| 2458 | return (error); |
| 2459 | } |
| 2460 | |
| 2461 | /* |
| 2462 | * scsipi_adapter_delref: |
| 2463 | * |
| 2464 | * Delete a reference to the adapter pointed to by the provided |
| 2465 | * link, disabling the adapter if possible. |
| 2466 | */ |
| 2467 | void |
| 2468 | scsipi_adapter_delref(struct scsipi_adapter *adapt) |
| 2469 | { |
| 2470 | |
| 2471 | if (atomic_dec_uint_nv(&adapt->adapt_refcnt) == 0 |
| 2472 | && adapt->adapt_enable != NULL) { |
| 2473 | scsipi_adapter_lock(adapt); |
| 2474 | (void) scsipi_adapter_enable(adapt, 0); |
| 2475 | scsipi_adapter_unlock(adapt); |
| 2476 | } |
| 2477 | } |
| 2478 | |
| 2479 | static struct scsipi_syncparam { |
| 2480 | int ss_factor; |
| 2481 | int ss_period; /* ns * 100 */ |
| 2482 | } scsipi_syncparams[] = { |
| 2483 | { 0x08, 625 }, /* FAST-160 (Ultra320) */ |
| 2484 | { 0x09, 1250 }, /* FAST-80 (Ultra160) */ |
| 2485 | { 0x0a, 2500 }, /* FAST-40 40MHz (Ultra2) */ |
| 2486 | { 0x0b, 3030 }, /* FAST-40 33MHz (Ultra2) */ |
| 2487 | { 0x0c, 5000 }, /* FAST-20 (Ultra) */ |
| 2488 | }; |
| 2489 | static const int scsipi_nsyncparams = |
| 2490 | sizeof(scsipi_syncparams) / sizeof(scsipi_syncparams[0]); |
| 2491 | |
| 2492 | int |
| 2493 | scsipi_sync_period_to_factor(int period /* ns * 100 */) |
| 2494 | { |
| 2495 | int i; |
| 2496 | |
| 2497 | for (i = 0; i < scsipi_nsyncparams; i++) { |
| 2498 | if (period <= scsipi_syncparams[i].ss_period) |
| 2499 | return (scsipi_syncparams[i].ss_factor); |
| 2500 | } |
| 2501 | |
| 2502 | return ((period / 100) / 4); |
| 2503 | } |
| 2504 | |
| 2505 | int |
| 2506 | scsipi_sync_factor_to_period(int factor) |
| 2507 | { |
| 2508 | int i; |
| 2509 | |
| 2510 | for (i = 0; i < scsipi_nsyncparams; i++) { |
| 2511 | if (factor == scsipi_syncparams[i].ss_factor) |
| 2512 | return (scsipi_syncparams[i].ss_period); |
| 2513 | } |
| 2514 | |
| 2515 | return ((factor * 4) * 100); |
| 2516 | } |
| 2517 | |
| 2518 | int |
| 2519 | scsipi_sync_factor_to_freq(int factor) |
| 2520 | { |
| 2521 | int i; |
| 2522 | |
| 2523 | for (i = 0; i < scsipi_nsyncparams; i++) { |
| 2524 | if (factor == scsipi_syncparams[i].ss_factor) |
| 2525 | return (100000000 / scsipi_syncparams[i].ss_period); |
| 2526 | } |
| 2527 | |
| 2528 | return (10000000 / ((factor * 4) * 10)); |
| 2529 | } |
| 2530 | |
| 2531 | static inline void |
| 2532 | scsipi_adapter_lock(struct scsipi_adapter *adapt) |
| 2533 | { |
| 2534 | |
| 2535 | if ((adapt->adapt_flags & SCSIPI_ADAPT_MPSAFE) == 0) |
| 2536 | KERNEL_LOCK(1, NULL); |
| 2537 | } |
| 2538 | |
| 2539 | static inline void |
| 2540 | scsipi_adapter_unlock(struct scsipi_adapter *adapt) |
| 2541 | { |
| 2542 | |
| 2543 | if ((adapt->adapt_flags & SCSIPI_ADAPT_MPSAFE) == 0) |
| 2544 | KERNEL_UNLOCK_ONE(NULL); |
| 2545 | } |
| 2546 | |
| 2547 | void |
| 2548 | scsipi_adapter_minphys(struct scsipi_channel *chan, struct buf *bp) |
| 2549 | { |
| 2550 | struct scsipi_adapter *adapt = chan->chan_adapter; |
| 2551 | |
| 2552 | scsipi_adapter_lock(adapt); |
| 2553 | (adapt->adapt_minphys)(bp); |
| 2554 | scsipi_adapter_unlock(chan->chan_adapter); |
| 2555 | } |
| 2556 | |
| 2557 | void |
| 2558 | scsipi_adapter_request(struct scsipi_channel *chan, |
| 2559 | scsipi_adapter_req_t req, void *arg) |
| 2560 | |
| 2561 | { |
| 2562 | struct scsipi_adapter *adapt = chan->chan_adapter; |
| 2563 | |
| 2564 | scsipi_adapter_lock(adapt); |
| 2565 | (adapt->adapt_request)(chan, req, arg); |
| 2566 | scsipi_adapter_unlock(adapt); |
| 2567 | } |
| 2568 | |
| 2569 | int |
| 2570 | scsipi_adapter_ioctl(struct scsipi_channel *chan, u_long cmd, |
| 2571 | void *data, int flag, struct proc *p) |
| 2572 | { |
| 2573 | struct scsipi_adapter *adapt = chan->chan_adapter; |
| 2574 | int error; |
| 2575 | |
| 2576 | if (adapt->adapt_ioctl == NULL) |
| 2577 | return ENOTTY; |
| 2578 | |
| 2579 | scsipi_adapter_lock(adapt); |
| 2580 | error = (adapt->adapt_ioctl)(chan, cmd, data, flag, p); |
| 2581 | scsipi_adapter_unlock(adapt); |
| 2582 | return error; |
| 2583 | } |
| 2584 | |
| 2585 | int |
| 2586 | scsipi_adapter_enable(struct scsipi_adapter *adapt, int enable) |
| 2587 | { |
| 2588 | int error; |
| 2589 | |
| 2590 | scsipi_adapter_lock(adapt); |
| 2591 | error = (adapt->adapt_enable)(adapt->adapt_dev, enable); |
| 2592 | scsipi_adapter_unlock(adapt); |
| 2593 | return error; |
| 2594 | } |
| 2595 | |
| 2596 | #ifdef SCSIPI_DEBUG |
| 2597 | /* |
| 2598 | * Given a scsipi_xfer, dump the request, in all its glory |
| 2599 | */ |
| 2600 | void |
| 2601 | show_scsipi_xs(struct scsipi_xfer *xs) |
| 2602 | { |
| 2603 | |
| 2604 | printf("xs(%p): " , xs); |
| 2605 | printf("xs_control(0x%08x)" , xs->xs_control); |
| 2606 | printf("xs_status(0x%08x)" , xs->xs_status); |
| 2607 | printf("periph(%p)" , xs->xs_periph); |
| 2608 | printf("retr(0x%x)" , xs->xs_retries); |
| 2609 | printf("timo(0x%x)" , xs->timeout); |
| 2610 | printf("cmd(%p)" , xs->cmd); |
| 2611 | printf("len(0x%x)" , xs->cmdlen); |
| 2612 | printf("data(%p)" , xs->data); |
| 2613 | printf("len(0x%x)" , xs->datalen); |
| 2614 | printf("res(0x%x)" , xs->resid); |
| 2615 | printf("err(0x%x)" , xs->error); |
| 2616 | printf("bp(%p)" , xs->bp); |
| 2617 | show_scsipi_cmd(xs); |
| 2618 | } |
| 2619 | |
| 2620 | void |
| 2621 | show_scsipi_cmd(struct scsipi_xfer *xs) |
| 2622 | { |
| 2623 | u_char *b = (u_char *) xs->cmd; |
| 2624 | int i = 0; |
| 2625 | |
| 2626 | scsipi_printaddr(xs->xs_periph); |
| 2627 | printf(" command: " ); |
| 2628 | |
| 2629 | if ((xs->xs_control & XS_CTL_RESET) == 0) { |
| 2630 | while (i < xs->cmdlen) { |
| 2631 | if (i) |
| 2632 | printf("," ); |
| 2633 | printf("0x%x" , b[i++]); |
| 2634 | } |
| 2635 | printf("-[%d bytes]\n" , xs->datalen); |
| 2636 | if (xs->datalen) |
| 2637 | show_mem(xs->data, min(64, xs->datalen)); |
| 2638 | } else |
| 2639 | printf("-RESET-\n" ); |
| 2640 | } |
| 2641 | |
| 2642 | void |
| 2643 | show_mem(u_char *address, int num) |
| 2644 | { |
| 2645 | int x; |
| 2646 | |
| 2647 | printf("------------------------------" ); |
| 2648 | for (x = 0; x < num; x++) { |
| 2649 | if ((x % 16) == 0) |
| 2650 | printf("\n%03d: " , x); |
| 2651 | printf("%02x " , *address++); |
| 2652 | } |
| 2653 | printf("\n------------------------------\n" ); |
| 2654 | } |
| 2655 | #endif /* SCSIPI_DEBUG */ |
| 2656 | |