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 } 469