| 1 | /* $NetBSD: ld.c,v 1.98 2016/10/11 18:31:11 jdolecek Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Andrew Doran and Charles M. Hannum. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Disk driver for use by RAID controllers. |
| 34 | */ |
| 35 | |
| 36 | #include <sys/cdefs.h> |
| 37 | __KERNEL_RCSID(0, "$NetBSD: ld.c,v 1.98 2016/10/11 18:31:11 jdolecek Exp $" ); |
| 38 | |
| 39 | #include <sys/param.h> |
| 40 | #include <sys/systm.h> |
| 41 | #include <sys/kernel.h> |
| 42 | #include <sys/device.h> |
| 43 | #include <sys/queue.h> |
| 44 | #include <sys/proc.h> |
| 45 | #include <sys/buf.h> |
| 46 | #include <sys/bufq.h> |
| 47 | #include <sys/endian.h> |
| 48 | #include <sys/disklabel.h> |
| 49 | #include <sys/disk.h> |
| 50 | #include <sys/dkio.h> |
| 51 | #include <sys/stat.h> |
| 52 | #include <sys/conf.h> |
| 53 | #include <sys/fcntl.h> |
| 54 | #include <sys/vnode.h> |
| 55 | #include <sys/syslog.h> |
| 56 | #include <sys/mutex.h> |
| 57 | #include <sys/module.h> |
| 58 | #include <sys/reboot.h> |
| 59 | |
| 60 | #include <dev/ldvar.h> |
| 61 | |
| 62 | static void ldminphys(struct buf *bp); |
| 63 | static bool ld_suspend(device_t, const pmf_qual_t *); |
| 64 | static bool ld_shutdown(device_t, int); |
| 65 | static int ld_diskstart(device_t, struct buf *bp); |
| 66 | static void ld_iosize(device_t, int *); |
| 67 | static int ld_dumpblocks(device_t, void *, daddr_t, int); |
| 68 | static void ld_fake_geometry(struct ld_softc *); |
| 69 | static void ld_set_geometry(struct ld_softc *); |
| 70 | static void ld_config_interrupts (device_t); |
| 71 | static int ld_lastclose(device_t); |
| 72 | static int ld_discard(device_t, off_t, off_t); |
| 73 | |
| 74 | extern struct cfdriver ld_cd; |
| 75 | |
| 76 | static dev_type_open(ldopen); |
| 77 | static dev_type_close(ldclose); |
| 78 | static dev_type_read(ldread); |
| 79 | static dev_type_write(ldwrite); |
| 80 | static dev_type_ioctl(ldioctl); |
| 81 | static dev_type_strategy(ldstrategy); |
| 82 | static dev_type_dump(lddump); |
| 83 | static dev_type_size(ldsize); |
| 84 | static dev_type_discard(lddiscard); |
| 85 | |
| 86 | const struct bdevsw ld_bdevsw = { |
| 87 | .d_open = ldopen, |
| 88 | .d_close = ldclose, |
| 89 | .d_strategy = ldstrategy, |
| 90 | .d_ioctl = ldioctl, |
| 91 | .d_dump = lddump, |
| 92 | .d_psize = ldsize, |
| 93 | .d_discard = lddiscard, |
| 94 | .d_flag = D_DISK | D_MPSAFE |
| 95 | }; |
| 96 | |
| 97 | const struct cdevsw ld_cdevsw = { |
| 98 | .d_open = ldopen, |
| 99 | .d_close = ldclose, |
| 100 | .d_read = ldread, |
| 101 | .d_write = ldwrite, |
| 102 | .d_ioctl = ldioctl, |
| 103 | .d_stop = nostop, |
| 104 | .d_tty = notty, |
| 105 | .d_poll = nopoll, |
| 106 | .d_mmap = nommap, |
| 107 | .d_kqfilter = nokqfilter, |
| 108 | .d_discard = lddiscard, |
| 109 | .d_flag = D_DISK | D_MPSAFE |
| 110 | }; |
| 111 | |
| 112 | static struct dkdriver lddkdriver = { |
| 113 | .d_open = ldopen, |
| 114 | .d_close = ldclose, |
| 115 | .d_strategy = ldstrategy, |
| 116 | .d_iosize = ld_iosize, |
| 117 | .d_minphys = ldminphys, |
| 118 | .d_diskstart = ld_diskstart, |
| 119 | .d_dumpblocks = ld_dumpblocks, |
| 120 | .d_lastclose = ld_lastclose, |
| 121 | .d_discard = ld_discard |
| 122 | }; |
| 123 | |
| 124 | void |
| 125 | ldattach(struct ld_softc *sc, const char *default_strategy) |
| 126 | { |
| 127 | device_t self = sc->sc_dv; |
| 128 | struct dk_softc *dksc = &sc->sc_dksc; |
| 129 | |
| 130 | mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_VM); |
| 131 | cv_init(&sc->sc_drain, "lddrain" ); |
| 132 | |
| 133 | if ((sc->sc_flags & LDF_ENABLED) == 0) { |
| 134 | return; |
| 135 | } |
| 136 | |
| 137 | /* Initialise dk and disk structure. */ |
| 138 | dk_init(dksc, self, DKTYPE_LD); |
| 139 | disk_init(&dksc->sc_dkdev, dksc->sc_xname, &lddkdriver); |
| 140 | |
| 141 | if (sc->sc_maxxfer > MAXPHYS) |
| 142 | sc->sc_maxxfer = MAXPHYS; |
| 143 | |
| 144 | /* Build synthetic geometry if necessary. */ |
| 145 | if (sc->sc_nheads == 0 || sc->sc_nsectors == 0 || |
| 146 | sc->sc_ncylinders == 0) |
| 147 | ld_fake_geometry(sc); |
| 148 | |
| 149 | sc->sc_disksize512 = sc->sc_secperunit * sc->sc_secsize / DEV_BSIZE; |
| 150 | |
| 151 | /* Attach dk and disk subsystems */ |
| 152 | dk_attach(dksc); |
| 153 | disk_attach(&dksc->sc_dkdev); |
| 154 | ld_set_geometry(sc); |
| 155 | |
| 156 | bufq_alloc(&dksc->sc_bufq, default_strategy, BUFQ_SORT_RAWBLOCK); |
| 157 | |
| 158 | /* Register with PMF */ |
| 159 | if (!pmf_device_register1(dksc->sc_dev, ld_suspend, NULL, ld_shutdown)) |
| 160 | aprint_error_dev(dksc->sc_dev, |
| 161 | "couldn't establish power handler\n" ); |
| 162 | |
| 163 | /* Discover wedges on this disk. */ |
| 164 | config_interrupts(sc->sc_dv, ld_config_interrupts); |
| 165 | } |
| 166 | |
| 167 | int |
| 168 | ldadjqparam(struct ld_softc *sc, int xmax) |
| 169 | { |
| 170 | |
| 171 | mutex_enter(&sc->sc_mutex); |
| 172 | sc->sc_maxqueuecnt = xmax; |
| 173 | mutex_exit(&sc->sc_mutex); |
| 174 | |
| 175 | return (0); |
| 176 | } |
| 177 | |
| 178 | int |
| 179 | ldbegindetach(struct ld_softc *sc, int flags) |
| 180 | { |
| 181 | struct dk_softc *dksc = &sc->sc_dksc; |
| 182 | int rv = 0; |
| 183 | |
| 184 | if ((sc->sc_flags & LDF_ENABLED) == 0) |
| 185 | return (0); |
| 186 | |
| 187 | rv = disk_begindetach(&dksc->sc_dkdev, ld_lastclose, dksc->sc_dev, flags); |
| 188 | |
| 189 | if (rv != 0) |
| 190 | return rv; |
| 191 | |
| 192 | mutex_enter(&sc->sc_mutex); |
| 193 | sc->sc_maxqueuecnt = 0; |
| 194 | |
| 195 | while (sc->sc_queuecnt > 0) { |
| 196 | sc->sc_flags |= LDF_DRAIN; |
| 197 | cv_wait(&sc->sc_drain, &sc->sc_mutex); |
| 198 | } |
| 199 | mutex_exit(&sc->sc_mutex); |
| 200 | |
| 201 | return (rv); |
| 202 | } |
| 203 | |
| 204 | void |
| 205 | ldenddetach(struct ld_softc *sc) |
| 206 | { |
| 207 | struct dk_softc *dksc = &sc->sc_dksc; |
| 208 | int bmaj, cmaj, i, mn; |
| 209 | |
| 210 | if ((sc->sc_flags & LDF_ENABLED) == 0) |
| 211 | return; |
| 212 | |
| 213 | mutex_enter(&sc->sc_mutex); |
| 214 | |
| 215 | /* Wait for commands queued with the hardware to complete. */ |
| 216 | if (sc->sc_queuecnt != 0) { |
| 217 | if (cv_timedwait(&sc->sc_drain, &sc->sc_mutex, 30 * hz)) |
| 218 | printf("%s: not drained\n" , dksc->sc_xname); |
| 219 | } |
| 220 | mutex_exit(&sc->sc_mutex); |
| 221 | |
| 222 | /* Kill off any queued buffers. */ |
| 223 | dk_drain(dksc); |
| 224 | bufq_free(dksc->sc_bufq); |
| 225 | |
| 226 | /* Locate the major numbers. */ |
| 227 | bmaj = bdevsw_lookup_major(&ld_bdevsw); |
| 228 | cmaj = cdevsw_lookup_major(&ld_cdevsw); |
| 229 | |
| 230 | /* Nuke the vnodes for any open instances. */ |
| 231 | for (i = 0; i < MAXPARTITIONS; i++) { |
| 232 | mn = DISKMINOR(device_unit(dksc->sc_dev), i); |
| 233 | vdevgone(bmaj, mn, mn, VBLK); |
| 234 | vdevgone(cmaj, mn, mn, VCHR); |
| 235 | } |
| 236 | |
| 237 | /* Delete all of our wedges. */ |
| 238 | dkwedge_delall(&dksc->sc_dkdev); |
| 239 | |
| 240 | /* Detach from the disk list. */ |
| 241 | disk_detach(&dksc->sc_dkdev); |
| 242 | disk_destroy(&dksc->sc_dkdev); |
| 243 | |
| 244 | dk_detach(dksc); |
| 245 | |
| 246 | /* Deregister with PMF */ |
| 247 | pmf_device_deregister(dksc->sc_dev); |
| 248 | |
| 249 | /* |
| 250 | * XXX We can't really flush the cache here, beceause the |
| 251 | * XXX device may already be non-existent from the controller's |
| 252 | * XXX perspective. |
| 253 | */ |
| 254 | #if 0 |
| 255 | /* Flush the device's cache. */ |
| 256 | if (sc->sc_flush != NULL) |
| 257 | if ((*sc->sc_flush)(sc, 0) != 0) |
| 258 | device_printf(dksc->sc_dev, "unable to flush cache\n" ); |
| 259 | #endif |
| 260 | cv_destroy(&sc->sc_drain); |
| 261 | mutex_destroy(&sc->sc_mutex); |
| 262 | } |
| 263 | |
| 264 | /* ARGSUSED */ |
| 265 | static bool |
| 266 | ld_suspend(device_t dev, const pmf_qual_t *qual) |
| 267 | { |
| 268 | return ld_shutdown(dev, 0); |
| 269 | } |
| 270 | |
| 271 | /* ARGSUSED */ |
| 272 | static bool |
| 273 | ld_shutdown(device_t dev, int flags) |
| 274 | { |
| 275 | struct ld_softc *sc = device_private(dev); |
| 276 | struct dk_softc *dksc = &sc->sc_dksc; |
| 277 | |
| 278 | if ((flags & RB_NOSYNC) == 0 && sc->sc_flush != NULL |
| 279 | && (*sc->sc_flush)(sc, LDFL_POLL) != 0) { |
| 280 | device_printf(dksc->sc_dev, "unable to flush cache\n" ); |
| 281 | return false; |
| 282 | } |
| 283 | |
| 284 | return true; |
| 285 | } |
| 286 | |
| 287 | /* ARGSUSED */ |
| 288 | static int |
| 289 | ldopen(dev_t dev, int flags, int fmt, struct lwp *l) |
| 290 | { |
| 291 | struct ld_softc *sc; |
| 292 | struct dk_softc *dksc; |
| 293 | int unit; |
| 294 | |
| 295 | unit = DISKUNIT(dev); |
| 296 | if ((sc = device_lookup_private(&ld_cd, unit)) == NULL) |
| 297 | return (ENXIO); |
| 298 | dksc = &sc->sc_dksc; |
| 299 | |
| 300 | return dk_open(dksc, dev, flags, fmt, l); |
| 301 | } |
| 302 | |
| 303 | static int |
| 304 | ld_lastclose(device_t self) |
| 305 | { |
| 306 | struct ld_softc *sc = device_private(self); |
| 307 | |
| 308 | if (sc->sc_flush != NULL && (*sc->sc_flush)(sc, 0) != 0) |
| 309 | device_printf(self, "unable to flush cache\n" ); |
| 310 | |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | /* ARGSUSED */ |
| 315 | static int |
| 316 | ldclose(dev_t dev, int flags, int fmt, struct lwp *l) |
| 317 | { |
| 318 | struct ld_softc *sc; |
| 319 | struct dk_softc *dksc; |
| 320 | int unit; |
| 321 | |
| 322 | unit = DISKUNIT(dev); |
| 323 | sc = device_lookup_private(&ld_cd, unit); |
| 324 | dksc = &sc->sc_dksc; |
| 325 | |
| 326 | return dk_close(dksc, dev, flags, fmt, l); |
| 327 | } |
| 328 | |
| 329 | /* ARGSUSED */ |
| 330 | static int |
| 331 | ldread(dev_t dev, struct uio *uio, int ioflag) |
| 332 | { |
| 333 | |
| 334 | return (physio(ldstrategy, NULL, dev, B_READ, ldminphys, uio)); |
| 335 | } |
| 336 | |
| 337 | /* ARGSUSED */ |
| 338 | static int |
| 339 | ldwrite(dev_t dev, struct uio *uio, int ioflag) |
| 340 | { |
| 341 | |
| 342 | return (physio(ldstrategy, NULL, dev, B_WRITE, ldminphys, uio)); |
| 343 | } |
| 344 | |
| 345 | /* ARGSUSED */ |
| 346 | static int |
| 347 | ldioctl(dev_t dev, u_long cmd, void *addr, int32_t flag, struct lwp *l) |
| 348 | { |
| 349 | struct ld_softc *sc; |
| 350 | struct dk_softc *dksc; |
| 351 | int unit, error; |
| 352 | |
| 353 | unit = DISKUNIT(dev); |
| 354 | sc = device_lookup_private(&ld_cd, unit); |
| 355 | dksc = &sc->sc_dksc; |
| 356 | |
| 357 | error = 0; |
| 358 | |
| 359 | switch (cmd) { |
| 360 | case DIOCCACHESYNC: |
| 361 | /* |
| 362 | * XXX Do we really need to care about having a writable |
| 363 | * file descriptor here? |
| 364 | */ |
| 365 | if ((flag & FWRITE) == 0) |
| 366 | error = EBADF; |
| 367 | else if (sc->sc_flush) |
| 368 | error = (*sc->sc_flush)(sc, 0); |
| 369 | else |
| 370 | error = 0; /* XXX Error out instead? */ |
| 371 | break; |
| 372 | |
| 373 | default: |
| 374 | error = dk_ioctl(dksc, dev, cmd, addr, flag, l); |
| 375 | break; |
| 376 | } |
| 377 | |
| 378 | return (error); |
| 379 | } |
| 380 | |
| 381 | static void |
| 382 | ldstrategy(struct buf *bp) |
| 383 | { |
| 384 | struct ld_softc *sc; |
| 385 | struct dk_softc *dksc; |
| 386 | int unit; |
| 387 | |
| 388 | unit = DISKUNIT(bp->b_dev); |
| 389 | sc = device_lookup_private(&ld_cd, unit); |
| 390 | dksc = &sc->sc_dksc; |
| 391 | |
| 392 | dk_strategy(dksc, bp); |
| 393 | } |
| 394 | |
| 395 | static int |
| 396 | ld_diskstart(device_t dev, struct buf *bp) |
| 397 | { |
| 398 | struct ld_softc *sc = device_private(dev); |
| 399 | int error; |
| 400 | |
| 401 | if (sc->sc_queuecnt >= sc->sc_maxqueuecnt) |
| 402 | return EAGAIN; |
| 403 | |
| 404 | mutex_enter(&sc->sc_mutex); |
| 405 | |
| 406 | if (sc->sc_queuecnt >= sc->sc_maxqueuecnt) |
| 407 | error = EAGAIN; |
| 408 | else { |
| 409 | error = (*sc->sc_start)(sc, bp); |
| 410 | if (error == 0) |
| 411 | sc->sc_queuecnt++; |
| 412 | } |
| 413 | |
| 414 | mutex_exit(&sc->sc_mutex); |
| 415 | |
| 416 | return error; |
| 417 | } |
| 418 | |
| 419 | void |
| 420 | lddone(struct ld_softc *sc, struct buf *bp) |
| 421 | { |
| 422 | struct dk_softc *dksc = &sc->sc_dksc; |
| 423 | |
| 424 | dk_done(dksc, bp); |
| 425 | |
| 426 | mutex_enter(&sc->sc_mutex); |
| 427 | if (--sc->sc_queuecnt <= sc->sc_maxqueuecnt) { |
| 428 | if ((sc->sc_flags & LDF_DRAIN) != 0) { |
| 429 | sc->sc_flags &= ~LDF_DRAIN; |
| 430 | cv_broadcast(&sc->sc_drain); |
| 431 | } |
| 432 | mutex_exit(&sc->sc_mutex); |
| 433 | dk_start(dksc, NULL); |
| 434 | } else |
| 435 | mutex_exit(&sc->sc_mutex); |
| 436 | } |
| 437 | |
| 438 | static int |
| 439 | ldsize(dev_t dev) |
| 440 | { |
| 441 | struct ld_softc *sc; |
| 442 | struct dk_softc *dksc; |
| 443 | int unit; |
| 444 | |
| 445 | unit = DISKUNIT(dev); |
| 446 | if ((sc = device_lookup_private(&ld_cd, unit)) == NULL) |
| 447 | return (ENODEV); |
| 448 | dksc = &sc->sc_dksc; |
| 449 | |
| 450 | if ((sc->sc_flags & LDF_ENABLED) == 0) |
| 451 | return (ENODEV); |
| 452 | |
| 453 | return dk_size(dksc, dev); |
| 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Take a dump. |
| 458 | */ |
| 459 | static int |
| 460 | lddump(dev_t dev, daddr_t blkno, void *va, size_t size) |
| 461 | { |
| 462 | struct ld_softc *sc; |
| 463 | struct dk_softc *dksc; |
| 464 | int unit; |
| 465 | |
| 466 | unit = DISKUNIT(dev); |
| 467 | if ((sc = device_lookup_private(&ld_cd, unit)) == NULL) |
| 468 | return (ENXIO); |
| 469 | dksc = &sc->sc_dksc; |
| 470 | |
| 471 | if ((sc->sc_flags & LDF_ENABLED) == 0) |
| 472 | return (ENODEV); |
| 473 | |
| 474 | return dk_dump(dksc, dev, blkno, va, size); |
| 475 | } |
| 476 | |
| 477 | static int |
| 478 | ld_dumpblocks(device_t dev, void *va, daddr_t blkno, int nblk) |
| 479 | { |
| 480 | struct ld_softc *sc = device_private(dev); |
| 481 | |
| 482 | if (sc->sc_dump == NULL) |
| 483 | return (ENODEV); |
| 484 | |
| 485 | return (*sc->sc_dump)(sc, va, blkno, nblk); |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * Adjust the size of a transfer. |
| 490 | */ |
| 491 | static void |
| 492 | ldminphys(struct buf *bp) |
| 493 | { |
| 494 | int unit; |
| 495 | struct ld_softc *sc; |
| 496 | |
| 497 | unit = DISKUNIT(bp->b_dev); |
| 498 | sc = device_lookup_private(&ld_cd, unit); |
| 499 | |
| 500 | ld_iosize(sc->sc_dv, &bp->b_bcount); |
| 501 | minphys(bp); |
| 502 | } |
| 503 | |
| 504 | static void |
| 505 | ld_iosize(device_t d, int *countp) |
| 506 | { |
| 507 | struct ld_softc *sc = device_private(d); |
| 508 | |
| 509 | if (*countp > sc->sc_maxxfer) |
| 510 | *countp = sc->sc_maxxfer; |
| 511 | } |
| 512 | |
| 513 | static void |
| 514 | ld_fake_geometry(struct ld_softc *sc) |
| 515 | { |
| 516 | uint64_t ncyl; |
| 517 | |
| 518 | if (sc->sc_secperunit <= 528 * 2048) /* 528MB */ |
| 519 | sc->sc_nheads = 16; |
| 520 | else if (sc->sc_secperunit <= 1024 * 2048) /* 1GB */ |
| 521 | sc->sc_nheads = 32; |
| 522 | else if (sc->sc_secperunit <= 21504 * 2048) /* 21GB */ |
| 523 | sc->sc_nheads = 64; |
| 524 | else if (sc->sc_secperunit <= 43008 * 2048) /* 42GB */ |
| 525 | sc->sc_nheads = 128; |
| 526 | else |
| 527 | sc->sc_nheads = 255; |
| 528 | |
| 529 | sc->sc_nsectors = 63; |
| 530 | sc->sc_ncylinders = INT_MAX; |
| 531 | ncyl = sc->sc_secperunit / |
| 532 | (sc->sc_nheads * sc->sc_nsectors); |
| 533 | if (ncyl < INT_MAX) |
| 534 | sc->sc_ncylinders = (int)ncyl; |
| 535 | } |
| 536 | |
| 537 | static void |
| 538 | ld_set_geometry(struct ld_softc *sc) |
| 539 | { |
| 540 | struct dk_softc *dksc = &sc->sc_dksc; |
| 541 | struct disk_geom *dg = &dksc->sc_dkdev.dk_geom; |
| 542 | char tbuf[9]; |
| 543 | |
| 544 | format_bytes(tbuf, sizeof(tbuf), sc->sc_secperunit * |
| 545 | sc->sc_secsize); |
| 546 | aprint_normal_dev(dksc->sc_dev, "%s, %d cyl, %d head, %d sec, " |
| 547 | "%d bytes/sect x %" PRIu64" sectors\n" , |
| 548 | tbuf, sc->sc_ncylinders, sc->sc_nheads, |
| 549 | sc->sc_nsectors, sc->sc_secsize, sc->sc_secperunit); |
| 550 | |
| 551 | memset(dg, 0, sizeof(*dg)); |
| 552 | dg->dg_secperunit = sc->sc_secperunit; |
| 553 | dg->dg_secsize = sc->sc_secsize; |
| 554 | dg->dg_nsectors = sc->sc_nsectors; |
| 555 | dg->dg_ntracks = sc->sc_nheads; |
| 556 | dg->dg_ncylinders = sc->sc_ncylinders; |
| 557 | |
| 558 | disk_set_info(dksc->sc_dev, &dksc->sc_dkdev, NULL); |
| 559 | } |
| 560 | |
| 561 | static void |
| 562 | ld_config_interrupts(device_t d) |
| 563 | { |
| 564 | struct ld_softc *sc = device_private(d); |
| 565 | struct dk_softc *dksc = &sc->sc_dksc; |
| 566 | |
| 567 | dkwedge_discover(&dksc->sc_dkdev); |
| 568 | } |
| 569 | |
| 570 | static int |
| 571 | ld_discard(device_t dev, off_t pos, off_t len) |
| 572 | { |
| 573 | struct ld_softc *sc = device_private(dev); |
| 574 | |
| 575 | if (sc->sc_discard == NULL) |
| 576 | return (ENODEV); |
| 577 | |
| 578 | return (*sc->sc_discard)(sc, pos, len); |
| 579 | } |
| 580 | |
| 581 | static int |
| 582 | lddiscard(dev_t dev, off_t pos, off_t len) |
| 583 | { |
| 584 | struct ld_softc *sc; |
| 585 | struct dk_softc *dksc; |
| 586 | int unit; |
| 587 | |
| 588 | unit = DISKUNIT(dev); |
| 589 | sc = device_lookup_private(&ld_cd, unit); |
| 590 | dksc = &sc->sc_dksc; |
| 591 | |
| 592 | return dk_discard(dksc, dev, pos, len); |
| 593 | } |
| 594 | |
| 595 | MODULE(MODULE_CLASS_DRIVER, ld, "dk_subr" ); |
| 596 | |
| 597 | #ifdef _MODULE |
| 598 | CFDRIVER_DECL(ld, DV_DISK, NULL); |
| 599 | #endif |
| 600 | |
| 601 | static int |
| 602 | ld_modcmd(modcmd_t cmd, void *opaque) |
| 603 | { |
| 604 | #ifdef _MODULE |
| 605 | devmajor_t bmajor, cmajor; |
| 606 | #endif |
| 607 | int error = 0; |
| 608 | |
| 609 | #ifdef _MODULE |
| 610 | switch (cmd) { |
| 611 | case MODULE_CMD_INIT: |
| 612 | bmajor = cmajor = -1; |
| 613 | error = devsw_attach(ld_cd.cd_name, &ld_bdevsw, &bmajor, |
| 614 | &ld_cdevsw, &cmajor); |
| 615 | if (error) |
| 616 | break; |
| 617 | error = config_cfdriver_attach(&ld_cd); |
| 618 | break; |
| 619 | case MODULE_CMD_FINI: |
| 620 | error = config_cfdriver_detach(&ld_cd); |
| 621 | if (error) |
| 622 | break; |
| 623 | devsw_detach(&ld_bdevsw, &ld_cdevsw); |
| 624 | break; |
| 625 | default: |
| 626 | error = ENOTTY; |
| 627 | break; |
| 628 | } |
| 629 | #endif |
| 630 | |
| 631 | return error; |
| 632 | } |
| 633 | |