| 1 | /*- |
| 2 | * Copyright (c) 2000 Michael Smith |
| 3 | * Copyright (c) 2001 Scott Long |
| 4 | * Copyright (c) 2000 BSDi |
| 5 | * Copyright (c) 2001 Adaptec, Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * $FreeBSD: head/sys/dev/aac/aac_disk.c 251115 2013-05-30 00:11:22Z marius $ |
| 30 | */ |
| 31 | |
| 32 | #include "opt_aac.h" |
| 33 | |
| 34 | #include <sys/param.h> |
| 35 | #include <sys/systm.h> |
| 36 | #include <sys/kernel.h> |
| 37 | #include <sys/module.h> |
| 38 | |
| 39 | #include <sys/bus.h> |
| 40 | #include <sys/conf.h> |
| 41 | #include <sys/disk.h> |
| 42 | #include <sys/dtype.h> |
| 43 | |
| 44 | #include <vm/vm.h> |
| 45 | #include <vm/pmap.h> |
| 46 | |
| 47 | #include <machine/md_var.h> |
| 48 | #include <sys/rman.h> |
| 49 | |
| 50 | #include <dev/raid/aac/aacreg.h> |
| 51 | #include <dev/raid/aac/aac_ioctl.h> |
| 52 | #include <dev/raid/aac/aacvar.h> |
| 53 | |
| 54 | /* |
| 55 | * Interface to parent. |
| 56 | */ |
| 57 | static int aac_disk_probe(device_t dev); |
| 58 | static int aac_disk_attach(device_t dev); |
| 59 | static int aac_disk_detach(device_t dev); |
| 60 | |
| 61 | /* |
| 62 | * Interface to the device switch. |
| 63 | */ |
| 64 | static d_open_t aac_disk_open; |
| 65 | static d_close_t aac_disk_close; |
| 66 | static d_strategy_t aac_disk_strategy; |
| 67 | static d_dump_t aac_disk_dump; |
| 68 | |
| 69 | static struct dev_ops aac_disk_ops = { |
| 70 | { "aacd", 0, D_DISK }, |
| 71 | .d_open = aac_disk_open, |
| 72 | .d_close = aac_disk_close, |
| 73 | .d_read = physread, |
| 74 | .d_write = physwrite, |
| 75 | .d_strategy = aac_disk_strategy, |
| 76 | .d_dump = aac_disk_dump, |
| 77 | }; |
| 78 | |
| 79 | static devclass_t aac_disk_devclass; |
| 80 | |
| 81 | static device_method_t aac_disk_methods[] = { |
| 82 | DEVMETHOD(device_probe, aac_disk_probe), |
| 83 | DEVMETHOD(device_attach, aac_disk_attach), |
| 84 | DEVMETHOD(device_detach, aac_disk_detach), |
| 85 | DEVMETHOD_END |
| 86 | }; |
| 87 | |
| 88 | static driver_t aac_disk_driver = { |
| 89 | "aacd", |
| 90 | aac_disk_methods, |
| 91 | sizeof(struct aac_disk) |
| 92 | }; |
| 93 | |
| 94 | DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, NULL, NULL); |
| 95 | |
| 96 | /* |
| 97 | * Handle open from generic layer. |
| 98 | * |
| 99 | * This is called by the diskslice code on first open in order to get the |
| 100 | * basic device geometry paramters. |
| 101 | */ |
| 102 | static int |
| 103 | aac_disk_open(struct dev_open_args *ap) |
| 104 | { |
| 105 | struct aac_disk *sc; |
| 106 | |
| 107 | fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); |
| 108 | |
| 109 | sc = ap->a_head.a_dev->si_drv1; |
| 110 | |
| 111 | if (sc == NULL) { |
| 112 | kprintf("aac_disk_open: No Softc\n"); |
| 113 | return (ENXIO); |
| 114 | } |
| 115 | |
| 116 | /* check that the controller is up and running */ |
| 117 | if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) { |
| 118 | device_printf(sc->ad_controller->aac_dev, |
| 119 | "Controller Suspended controller state = 0x%x\n", |
| 120 | sc->ad_controller->aac_state); |
| 121 | return(ENXIO); |
| 122 | } |
| 123 | |
| 124 | sc->ad_flags |= AAC_DISK_OPEN; |
| 125 | return (0); |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Handle last close of the disk device. |
| 130 | */ |
| 131 | static int |
| 132 | aac_disk_close(struct dev_close_args *ap) |
| 133 | { |
| 134 | struct aac_disk *sc; |
| 135 | |
| 136 | fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); |
| 137 | |
| 138 | sc = ap->a_head.a_dev->si_drv1; |
| 139 | |
| 140 | if (sc == NULL) |
| 141 | return (ENXIO); |
| 142 | |
| 143 | sc->ad_flags &= ~AAC_DISK_OPEN; |
| 144 | return (0); |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * Handle an I/O request. |
| 149 | */ |
| 150 | static int |
| 151 | aac_disk_strategy(struct dev_strategy_args *ap) |
| 152 | { |
| 153 | struct bio *bio = ap->a_bio; |
| 154 | struct buf *bp = bio->bio_buf; |
| 155 | struct aac_disk *sc; |
| 156 | |
| 157 | sc = ap->a_head.a_dev->si_drv1; |
| 158 | fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); |
| 159 | |
| 160 | /* bogus disk? */ |
| 161 | if (sc == NULL) { |
| 162 | bp->b_flags |= B_ERROR; |
| 163 | bp->b_error = EINVAL; |
| 164 | biodone(bio); |
| 165 | return (0); |
| 166 | } |
| 167 | |
| 168 | /* do-nothing operation? */ |
| 169 | if (bp->b_bcount == 0) { |
| 170 | bp->b_resid = bp->b_bcount; |
| 171 | biodone(bio); |
| 172 | return (0); |
| 173 | } |
| 174 | |
| 175 | /* perform accounting */ |
| 176 | |
| 177 | /* pass the bio to the controller - it can work out who we are */ |
| 178 | lockmgr(&sc->ad_controller->aac_io_lock, LK_EXCLUSIVE); |
| 179 | devstat_start_transaction(&sc->ad_stats); |
| 180 | aac_submit_bio(sc, bio); |
| 181 | lockmgr(&sc->ad_controller->aac_io_lock, LK_RELEASE); |
| 182 | |
| 183 | return (0); |
| 184 | } |
| 185 | |
| 186 | /* |
| 187 | * Map the S/G elements for doing a dump. |
| 188 | */ |
| 189 | static void |
| 190 | aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error) |
| 191 | { |
| 192 | struct aac_fib *fib; |
| 193 | struct aac_blockwrite *bw; |
| 194 | struct aac_sg_table *sg; |
| 195 | int i; |
| 196 | |
| 197 | fib = (struct aac_fib *)arg; |
| 198 | bw = (struct aac_blockwrite *)&fib->data[0]; |
| 199 | sg = &bw->SgMap; |
| 200 | |
| 201 | if (sg != NULL) { |
| 202 | sg->SgCount = nsegs; |
| 203 | for (i = 0; i < nsegs; i++) { |
| 204 | if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT) |
| 205 | return; |
| 206 | sg->SgEntry[i].SgAddress = segs[i].ds_addr; |
| 207 | sg->SgEntry[i].SgByteCount = segs[i].ds_len; |
| 208 | } |
| 209 | fib->Header.Size = nsegs * sizeof(struct aac_sg_entry); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | /* |
| 214 | * Map the S/G elements for doing a dump on 64-bit capable devices. |
| 215 | */ |
| 216 | static void |
| 217 | aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error) |
| 218 | { |
| 219 | struct aac_fib *fib; |
| 220 | struct aac_blockwrite64 *bw; |
| 221 | struct aac_sg_table64 *sg; |
| 222 | int i; |
| 223 | |
| 224 | fib = (struct aac_fib *)arg; |
| 225 | bw = (struct aac_blockwrite64 *)&fib->data[0]; |
| 226 | sg = &bw->SgMap64; |
| 227 | |
| 228 | if (sg != NULL) { |
| 229 | sg->SgCount = nsegs; |
| 230 | for (i = 0; i < nsegs; i++) { |
| 231 | sg->SgEntry64[i].SgAddress = segs[i].ds_addr; |
| 232 | sg->SgEntry64[i].SgByteCount = segs[i].ds_len; |
| 233 | } |
| 234 | fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | /* |
| 239 | * Dump memory out to an array |
| 240 | * |
| 241 | * Send out one command at a time with up to maxio of data. |
| 242 | */ |
| 243 | static int |
| 244 | aac_disk_dump(struct dev_dump_args *ap) |
| 245 | { |
| 246 | cdev_t dev = ap->a_head.a_dev; |
| 247 | size_t length = ap->a_length; |
| 248 | off_t offset = ap->a_offset; |
| 249 | void *virtual = ap->a_virtual; |
| 250 | vm_offset_t physical = ap->a_physical; |
| 251 | struct aac_disk *ad; |
| 252 | struct aac_softc *sc; |
| 253 | struct aac_fib *fib; |
| 254 | size_t len, maxio; |
| 255 | int size; |
| 256 | static bus_dmamap_t dump_datamap; |
| 257 | static int first = 0; |
| 258 | bus_dmamap_callback_t *callback; |
| 259 | u_int32_t command; |
| 260 | |
| 261 | ad = dev->si_drv1; |
| 262 | |
| 263 | if (ad == NULL) |
| 264 | return (EINVAL); |
| 265 | |
| 266 | sc= ad->ad_controller; |
| 267 | |
| 268 | if (!first) { |
| 269 | first = 1; |
| 270 | if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) { |
| 271 | device_printf(sc->aac_dev, |
| 272 | "bus_dmamap_create failed\n"); |
| 273 | return (ENOMEM); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | /* Skip aac_alloc_sync_fib(). We don't want to mess with sleep locks */ |
| 278 | fib = &sc->aac_common->ac_sync_fib; |
| 279 | |
| 280 | while (length > 0) { |
| 281 | maxio = sc->aac_max_sectors << 9; |
| 282 | len = (length > maxio) ? maxio : length; |
| 283 | if ((sc->flags & AAC_FLAGS_SG_64BIT) == 0) { |
| 284 | struct aac_blockwrite *bw; |
| 285 | bw = (struct aac_blockwrite *)&fib->data[0]; |
| 286 | bw->Command = VM_CtBlockWrite; |
| 287 | bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; |
| 288 | bw->BlockNumber = offset / AAC_BLOCK_SIZE; |
| 289 | bw->ByteCount = len; |
| 290 | bw->Stable = CUNSTABLE; |
| 291 | command = ContainerCommand; |
| 292 | callback = aac_dump_map_sg; |
| 293 | size = sizeof(struct aac_blockwrite); |
| 294 | } else { |
| 295 | struct aac_blockwrite64 *bw; |
| 296 | bw = (struct aac_blockwrite64 *)&fib->data[0]; |
| 297 | bw->Command = VM_CtHostWrite64; |
| 298 | bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; |
| 299 | bw->BlockNumber = offset / AAC_BLOCK_SIZE; |
| 300 | bw->SectorCount = len / AAC_BLOCK_SIZE; |
| 301 | bw->Pad = 0; |
| 302 | bw->Flags = 0; |
| 303 | command = ContainerCommand64; |
| 304 | callback = aac_dump_map_sg64; |
| 305 | size = sizeof(struct aac_blockwrite64); |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * There really isn't any way to recover from errors or |
| 310 | * resource shortages here. Oh well. Because of that, don't |
| 311 | * bother trying to send the command from the callback; there |
| 312 | * is too much required context. |
| 313 | */ |
| 314 | if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual, |
| 315 | len, callback, fib, BUS_DMA_NOWAIT) != 0) |
| 316 | return (ENOMEM); |
| 317 | |
| 318 | bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, |
| 319 | BUS_DMASYNC_PREWRITE); |
| 320 | |
| 321 | /* fib->Header.Size is set in aac_dump_map_sg */ |
| 322 | size += fib->Header.Size; |
| 323 | |
| 324 | if (aac_sync_fib(sc, command, 0, fib, size)) { |
| 325 | device_printf(sc->aac_dev, |
| 326 | "Error dumping block 0x%jx\n", |
| 327 | (uintmax_t)physical); |
| 328 | return (EIO); |
| 329 | } |
| 330 | |
| 331 | bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, |
| 332 | BUS_DMASYNC_POSTWRITE); |
| 333 | |
| 334 | bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap); |
| 335 | |
| 336 | length -= len; |
| 337 | offset += len; |
| 338 | virtual = (uint8_t *)virtual + len; |
| 339 | } |
| 340 | |
| 341 | return (0); |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * Handle completion of an I/O request. |
| 346 | */ |
| 347 | void |
| 348 | aac_biodone(struct bio *bio, const char *code) |
| 349 | { |
| 350 | struct buf *bp = bio->bio_buf; |
| 351 | struct aac_disk *sc; |
| 352 | |
| 353 | sc = (struct aac_disk *)bio->bio_driver_info; |
| 354 | fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); |
| 355 | |
| 356 | devstat_end_transaction_buf(&sc->ad_stats, bp); |
| 357 | if (bp->b_flags & B_ERROR) { |
| 358 | bp->b_resid = bp->b_bcount; |
| 359 | diskerr(bio, sc->ad_dev_t, code, 0, 0); |
| 360 | } |
| 361 | |
| 362 | biodone(bio); |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * Stub only. |
| 367 | */ |
| 368 | static int |
| 369 | aac_disk_probe(device_t dev) |
| 370 | { |
| 371 | |
| 372 | fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); |
| 373 | |
| 374 | return (0); |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Attach a unit to the controller. |
| 379 | */ |
| 380 | static int |
| 381 | aac_disk_attach(device_t dev) |
| 382 | { |
| 383 | struct disk_info info; |
| 384 | struct aac_disk *sc; |
| 385 | |
| 386 | sc = (struct aac_disk *)device_get_softc(dev); |
| 387 | fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); |
| 388 | |
| 389 | /* initialise our softc */ |
| 390 | sc->ad_controller = |
| 391 | (struct aac_softc *)device_get_softc(device_get_parent(dev)); |
| 392 | sc->ad_container = device_get_ivars(dev); |
| 393 | sc->ad_dev = dev; |
| 394 | |
| 395 | /* |
| 396 | * require that extended translation be enabled - other drivers read the |
| 397 | * disk! |
| 398 | */ |
| 399 | sc->ad_size = sc->ad_container->co_mntobj.Capacity; |
| 400 | if (sc->ad_controller->flags & AAC_FLAGS_LBA_64BIT) |
| 401 | sc->ad_size += (u_int64_t) |
| 402 | sc->ad_container->co_mntobj.CapacityHigh << 32; |
| 403 | if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ |
| 404 | sc->ad_heads = 255; |
| 405 | sc->ad_sectors = 63; |
| 406 | } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ |
| 407 | sc->ad_heads = 128; |
| 408 | sc->ad_sectors = 32; |
| 409 | } else { |
| 410 | sc->ad_heads = 64; |
| 411 | sc->ad_sectors = 32; |
| 412 | } |
| 413 | sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); |
| 414 | |
| 415 | device_printf(dev, "%juMB (%ju sectors)\n", |
| 416 | (intmax_t)sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), |
| 417 | (intmax_t)sc->ad_size); |
| 418 | devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev), |
| 419 | AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS, |
| 420 | DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, |
| 421 | DEVSTAT_PRIORITY_ARRAY); |
| 422 | |
| 423 | /* attach a generic disk device to ourselves */ |
| 424 | sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, |
| 425 | &aac_disk_ops); |
| 426 | sc->ad_dev_t->si_drv1 = sc; |
| 427 | |
| 428 | sc->ad_dev_t->si_iosize_max = sc->ad_controller->aac_max_sectors << 9; |
| 429 | sc->unit = device_get_unit(dev); |
| 430 | |
| 431 | /* |
| 432 | * Set disk info, as it appears that all needed data is available already. |
| 433 | * Setting the disk info will also cause the probing to start. |
| 434 | */ |
| 435 | bzero(&info, sizeof(info)); |
| 436 | info.d_media_blksize= AAC_BLOCK_SIZE; /* mandatory */ |
| 437 | info.d_media_blocks = sc->ad_size; |
| 438 | |
| 439 | info.d_type = DTYPE_ESDI; /* optional */ |
| 440 | info.d_secpertrack = sc->ad_sectors; |
| 441 | info.d_nheads = sc->ad_heads; |
| 442 | info.d_ncylinders = sc->ad_cylinders; |
| 443 | info.d_secpercyl = sc->ad_sectors * sc->ad_heads; |
| 444 | |
| 445 | disk_setdiskinfo(&sc->ad_disk, &info); |
| 446 | |
| 447 | return (0); |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * Disconnect ourselves from the system. |
| 452 | */ |
| 453 | static int |
| 454 | aac_disk_detach(device_t dev) |
| 455 | { |
| 456 | struct aac_disk *sc; |
| 457 | |
| 458 | sc = (struct aac_disk *)device_get_softc(dev); |
| 459 | fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); |
| 460 | |
| 461 | if (sc->ad_flags & AAC_DISK_OPEN) |
| 462 | return(EBUSY); |
| 463 | |
| 464 | devstat_remove_entry(&sc->ad_stats); |
| 465 | disk_destroy(&sc->ad_disk); |
| 466 | |
| 467 | return(0); |
| 468 | } |