| 1 | /*- |
| 2 | * Copyright (c) 2006 IronPort Systems |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 | * SUCH DAMAGE. |
| 25 | */ |
| 26 | /*- |
| 27 | * Redistribution and use in source and binary forms, with or without |
| 28 | * modification, are permitted provided that the following conditions |
| 29 | * are met: |
| 30 | * |
| 31 | * Copyright 1994-2009 The FreeBSD Project. |
| 32 | * All rights reserved. |
| 33 | * |
| 34 | * 1. Redistributions of source code must retain the above copyright |
| 35 | * notice, this list of conditions and the following disclaimer. |
| 36 | * 2. Redistributions in binary form must reproduce the above copyright |
| 37 | * notice, this list of conditions and the following disclaimer in the |
| 38 | * documentation and/or other materials provided with the distribution. |
| 39 | * |
| 40 | * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 42 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR |
| 44 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 45 | * EXEMPLARY,OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 46 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 47 | * PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY THEORY |
| 48 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 49 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 50 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * |
| 52 | * The views and conclusions contained in the software and documentation |
| 53 | * are those of the authors and should not be interpreted as representing |
| 54 | * official policies,either expressed or implied, of the FreeBSD Project. |
| 55 | * |
| 56 | * $FreeBSD: src/sys/dev/mfi/mfi_disk.c,v 1.8 2008/11/17 23:30:19 jhb Exp $ |
| 57 | */ |
| 58 | |
| 59 | #include "opt_mfi.h" |
| 60 | |
| 61 | #include <sys/param.h> |
| 62 | #include <sys/systm.h> |
| 63 | #include <sys/kernel.h> |
| 64 | #include <sys/module.h> |
| 65 | #include <sys/malloc.h> |
| 66 | #include <sys/uio.h> |
| 67 | |
| 68 | #include <sys/buf2.h> |
| 69 | #include <sys/bus.h> |
| 70 | #include <sys/conf.h> |
| 71 | #include <sys/disk.h> |
| 72 | |
| 73 | #include <vm/vm.h> |
| 74 | #include <vm/pmap.h> |
| 75 | |
| 76 | #include <machine/md_var.h> |
| 77 | #include <sys/rman.h> |
| 78 | |
| 79 | #include <dev/raid/mfi/mfireg.h> |
| 80 | #include <dev/raid/mfi/mfi_ioctl.h> |
| 81 | #include <dev/raid/mfi/mfivar.h> |
| 82 | |
| 83 | static int mfi_disk_probe(device_t dev); |
| 84 | static int mfi_disk_attach(device_t dev); |
| 85 | static int mfi_disk_detach(device_t dev); |
| 86 | |
| 87 | static d_open_t mfi_disk_open; |
| 88 | static d_close_t mfi_disk_close; |
| 89 | static d_strategy_t mfi_disk_strategy; |
| 90 | static d_dump_t mfi_disk_dump; |
| 91 | |
| 92 | static struct dev_ops mfi_disk_ops = { |
| 93 | { "mfid", 0, D_DISK }, |
| 94 | .d_open = mfi_disk_open, |
| 95 | .d_close = mfi_disk_close, |
| 96 | .d_strategy = mfi_disk_strategy, |
| 97 | .d_dump = mfi_disk_dump, |
| 98 | }; |
| 99 | |
| 100 | static devclass_t mfi_disk_devclass; |
| 101 | |
| 102 | static device_method_t mfi_disk_methods[] = { |
| 103 | DEVMETHOD(device_probe, mfi_disk_probe), |
| 104 | DEVMETHOD(device_attach, mfi_disk_attach), |
| 105 | DEVMETHOD(device_detach, mfi_disk_detach), |
| 106 | { 0, 0 } |
| 107 | }; |
| 108 | |
| 109 | static driver_t mfi_disk_driver = { |
| 110 | "mfid", |
| 111 | mfi_disk_methods, |
| 112 | sizeof(struct mfi_disk) |
| 113 | }; |
| 114 | |
| 115 | DRIVER_MODULE(mfid, mfi, mfi_disk_driver, mfi_disk_devclass, NULL, NULL); |
| 116 | |
| 117 | static int |
| 118 | mfi_disk_probe(device_t dev) |
| 119 | { |
| 120 | |
| 121 | return (0); |
| 122 | } |
| 123 | |
| 124 | static int |
| 125 | mfi_disk_attach(device_t dev) |
| 126 | { |
| 127 | struct mfi_disk *sc; |
| 128 | struct mfi_ld_info *ld_info; |
| 129 | struct disk_info info; |
| 130 | uint64_t sectors; |
| 131 | uint32_t secsize; |
| 132 | char *state; |
| 133 | |
| 134 | sc = device_get_softc(dev); |
| 135 | ld_info = device_get_ivars(dev); |
| 136 | |
| 137 | sc->ld_dev = dev; |
| 138 | sc->ld_id = ld_info->ld_config.properties.ld.v.target_id; |
| 139 | sc->ld_unit = device_get_unit(dev); |
| 140 | sc->ld_info = ld_info; |
| 141 | sc->ld_controller = device_get_softc(device_get_parent(dev)); |
| 142 | sc->ld_flags = 0; |
| 143 | |
| 144 | sectors = ld_info->size; |
| 145 | secsize = MFI_SECTOR_LEN; |
| 146 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_EXCLUSIVE); |
| 147 | TAILQ_INSERT_TAIL(&sc->ld_controller->mfi_ld_tqh, sc, ld_link); |
| 148 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_RELEASE); |
| 149 | |
| 150 | switch (ld_info->ld_config.params.state) { |
| 151 | case MFI_LD_STATE_OFFLINE: |
| 152 | state = "offline"; |
| 153 | break; |
| 154 | case MFI_LD_STATE_PARTIALLY_DEGRADED: |
| 155 | state = "partially degraded"; |
| 156 | break; |
| 157 | case MFI_LD_STATE_DEGRADED: |
| 158 | state = "degraded"; |
| 159 | break; |
| 160 | case MFI_LD_STATE_OPTIMAL: |
| 161 | state = "optimal"; |
| 162 | break; |
| 163 | default: |
| 164 | state = "unknown"; |
| 165 | break; |
| 166 | } |
| 167 | device_printf(dev, "%juMB (%ju sectors) RAID volume '%s' is %s\n", |
| 168 | sectors / (1024 * 1024 / secsize), sectors, |
| 169 | ld_info->ld_config.properties.name, |
| 170 | state); |
| 171 | |
| 172 | devstat_add_entry(&sc->ld_devstat, "mfid", device_get_unit(dev), |
| 173 | MFI_SECTOR_LEN, DEVSTAT_NO_ORDERED_TAGS, |
| 174 | DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, |
| 175 | DEVSTAT_PRIORITY_ARRAY); |
| 176 | |
| 177 | sc->ld_dev_t = disk_create(sc->ld_unit, &sc->ld_disk, &mfi_disk_ops); |
| 178 | sc->ld_dev_t->si_drv1 = sc; |
| 179 | sc->ld_dev_t->si_iosize_max = |
| 180 | min(sc->ld_controller->mfi_max_io * secsize, |
| 181 | (sc->ld_controller->mfi_max_sge - 1) * PAGE_SIZE); |
| 182 | |
| 183 | bzero(&info, sizeof(info)); |
| 184 | info.d_media_blksize = secsize; /* mandatory */ |
| 185 | info.d_media_blocks = sectors; |
| 186 | |
| 187 | if (info.d_media_blocks >= (1 * 1024 * 1024)) { |
| 188 | info.d_nheads = 255; |
| 189 | info.d_secpertrack = 63; |
| 190 | } else { |
| 191 | info.d_nheads = 64; |
| 192 | info.d_secpertrack = 32; |
| 193 | } |
| 194 | |
| 195 | disk_setdiskinfo(&sc->ld_disk, &info); |
| 196 | |
| 197 | return (0); |
| 198 | } |
| 199 | |
| 200 | static int |
| 201 | mfi_disk_detach(device_t dev) |
| 202 | { |
| 203 | struct mfi_disk *sc; |
| 204 | |
| 205 | sc = device_get_softc(dev); |
| 206 | |
| 207 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_EXCLUSIVE); |
| 208 | if ((sc->ld_flags & MFI_DISK_FLAGS_OPEN) && |
| 209 | (sc->ld_controller->mfi_keep_deleted_volumes || |
| 210 | sc->ld_controller->mfi_detaching)) { |
| 211 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_RELEASE); |
| 212 | return (EBUSY); |
| 213 | } |
| 214 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_RELEASE); |
| 215 | |
| 216 | disk_destroy(&sc->ld_disk); |
| 217 | devstat_remove_entry(&sc->ld_devstat); |
| 218 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_EXCLUSIVE); |
| 219 | TAILQ_REMOVE(&sc->ld_controller->mfi_ld_tqh, sc, ld_link); |
| 220 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_RELEASE); |
| 221 | kfree(sc->ld_info, M_MFIBUF); |
| 222 | return (0); |
| 223 | } |
| 224 | |
| 225 | static int |
| 226 | mfi_disk_open(struct dev_open_args *ap) |
| 227 | { |
| 228 | struct mfi_disk *sc = ap->a_head.a_dev->si_drv1; |
| 229 | int error; |
| 230 | |
| 231 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_EXCLUSIVE); |
| 232 | if (sc->ld_flags & MFI_DISK_FLAGS_DISABLED) |
| 233 | error = ENXIO; |
| 234 | else { |
| 235 | sc->ld_flags |= MFI_DISK_FLAGS_OPEN; |
| 236 | error = 0; |
| 237 | } |
| 238 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_RELEASE); |
| 239 | |
| 240 | return (error); |
| 241 | } |
| 242 | |
| 243 | static int |
| 244 | mfi_disk_close(struct dev_close_args *ap) |
| 245 | { |
| 246 | struct mfi_disk *sc = ap->a_head.a_dev->si_drv1; |
| 247 | |
| 248 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_EXCLUSIVE); |
| 249 | sc->ld_flags &= ~MFI_DISK_FLAGS_OPEN; |
| 250 | lockmgr(&sc->ld_controller->mfi_io_lock, LK_RELEASE); |
| 251 | |
| 252 | return (0); |
| 253 | } |
| 254 | |
| 255 | int |
| 256 | mfi_disk_disable(struct mfi_disk *sc) |
| 257 | { |
| 258 | |
| 259 | KKASSERT(lockstatus(&sc->ld_controller->mfi_io_lock, curthread) != 0); |
| 260 | if (sc->ld_flags & MFI_DISK_FLAGS_OPEN) { |
| 261 | if (sc->ld_controller->mfi_delete_busy_volumes) |
| 262 | return (0); |
| 263 | device_printf(sc->ld_dev, "Unable to delete busy ld device\n"); |
| 264 | return (EBUSY); |
| 265 | } |
| 266 | sc->ld_flags |= MFI_DISK_FLAGS_DISABLED; |
| 267 | return (0); |
| 268 | } |
| 269 | |
| 270 | void |
| 271 | mfi_disk_enable(struct mfi_disk *sc) |
| 272 | { |
| 273 | |
| 274 | KKASSERT(lockstatus(&sc->ld_controller->mfi_io_lock, curthread) != 0); |
| 275 | sc->ld_flags &= ~MFI_DISK_FLAGS_DISABLED; |
| 276 | } |
| 277 | |
| 278 | static int |
| 279 | mfi_disk_strategy(struct dev_strategy_args *ap) |
| 280 | { |
| 281 | struct bio *bio = ap->a_bio; |
| 282 | struct buf *bp = bio->bio_buf; |
| 283 | struct mfi_disk *sc = ap->a_head.a_dev->si_drv1; |
| 284 | struct mfi_softc *controller; |
| 285 | |
| 286 | if (sc == NULL) { |
| 287 | bp->b_error = EINVAL; |
| 288 | bp->b_flags |= B_ERROR; |
| 289 | bp->b_resid = bp->b_bcount; |
| 290 | biodone(bio); |
| 291 | return (0); |
| 292 | } |
| 293 | |
| 294 | /* |
| 295 | * XXX swildner |
| 296 | * |
| 297 | * If it's a null transfer, do nothing. FreeBSD's original driver |
| 298 | * doesn't have this, but that caused hard error messages (even |
| 299 | * though everything else continued to work fine). Interestingly, |
| 300 | * only when HAMMER was used. |
| 301 | * |
| 302 | * Several others of our RAID drivers have this check, such as |
| 303 | * aac(4) and ida(4), so we insert it here, too. |
| 304 | * |
| 305 | * The cause of null transfers is yet unknown. |
| 306 | */ |
| 307 | if (bp->b_bcount == 0) { |
| 308 | bp->b_resid = bp->b_bcount; |
| 309 | biodone(bio); |
| 310 | return (0); |
| 311 | } |
| 312 | |
| 313 | controller = sc->ld_controller; |
| 314 | bio->bio_driver_info = sc; |
| 315 | lockmgr(&controller->mfi_io_lock, LK_EXCLUSIVE); |
| 316 | mfi_enqueue_bio(controller, bio); |
| 317 | devstat_start_transaction(&sc->ld_devstat); |
| 318 | mfi_startio(controller); |
| 319 | lockmgr(&controller->mfi_io_lock, LK_RELEASE); |
| 320 | return (0); |
| 321 | } |
| 322 | |
| 323 | void |
| 324 | mfi_disk_complete(struct bio *bio) |
| 325 | { |
| 326 | struct mfi_disk *sc = bio->bio_driver_info; |
| 327 | struct buf *bp = bio->bio_buf; |
| 328 | |
| 329 | devstat_end_transaction_buf(&sc->ld_devstat, bp); |
| 330 | if (bp->b_flags & B_ERROR) { |
| 331 | if (bp->b_error == 0) |
| 332 | bp->b_error = EIO; |
| 333 | diskerr(bio, sc->ld_disk.d_cdev, "hard error", -1, 1); |
| 334 | kprintf("\n"); |
| 335 | } else { |
| 336 | bp->b_resid = 0; |
| 337 | } |
| 338 | biodone(bio); |
| 339 | } |
| 340 | |
| 341 | static int |
| 342 | mfi_disk_dump(struct dev_dump_args *ap) |
| 343 | { |
| 344 | cdev_t dev = ap->a_head.a_dev; |
| 345 | off_t offset = ap->a_offset; |
| 346 | void *virt = ap->a_virtual; |
| 347 | size_t len = ap->a_length; |
| 348 | struct mfi_disk *sc; |
| 349 | struct mfi_softc *parent_sc; |
| 350 | int error; |
| 351 | |
| 352 | sc = dev->si_drv1; |
| 353 | parent_sc = sc->ld_controller; |
| 354 | |
| 355 | if (len > 0) { |
| 356 | if ((error = mfi_dump_blocks(parent_sc, sc->ld_id, offset / |
| 357 | MFI_SECTOR_LEN, virt, len)) != 0) |
| 358 | return (error); |
| 359 | } else { |
| 360 | /* mfi_sync_cache(parent_sc, sc->ld_id); */ |
| 361 | } |
| 362 | |
| 363 | return (0); |
| 364 | } |