1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2000 Michael Smith 5 * Copyright (c) 2001 Scott Long 6 * Copyright (c) 2000 BSDi 7 * Copyright (c) 2001 Adaptec, Inc. 8 * All rights reserved. 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_aac.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 42 #include <sys/bus.h> 43 #include <sys/conf.h> 44 #include <sys/disk.h> 45 46 #include <vm/vm.h> 47 #include <vm/pmap.h> 48 49 #include <machine/md_var.h> 50 #include <machine/bus.h> 51 #include <sys/rman.h> 52 53 #include <dev/aac/aacreg.h> 54 #include <sys/aac_ioctl.h> 55 #include <dev/aac/aacvar.h> 56 57 /* 58 * Interface to parent. 59 */ 60 static int aac_disk_probe(device_t dev); 61 static int aac_disk_attach(device_t dev); 62 static int aac_disk_detach(device_t dev); 63 64 /* 65 * Interface to the device switch. 66 */ 67 static disk_open_t aac_disk_open; 68 static disk_close_t aac_disk_close; 69 static disk_strategy_t aac_disk_strategy; 70 static dumper_t aac_disk_dump; 71 72 static devclass_t aac_disk_devclass; 73 74 static device_method_t aac_disk_methods[] = { 75 DEVMETHOD(device_probe, aac_disk_probe), 76 DEVMETHOD(device_attach, aac_disk_attach), 77 DEVMETHOD(device_detach, aac_disk_detach), 78 DEVMETHOD_END 79 }; 80 81 static driver_t aac_disk_driver = { 82 "aacd", 83 aac_disk_methods, 84 sizeof(struct aac_disk) 85 }; 86 87 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, NULL, NULL); 88 89 /* 90 * Handle open from generic layer. 91 * 92 * This is called by the diskslice code on first open in order to get the 93 * basic device geometry parameters. 94 */ 95 static int 96 aac_disk_open(struct disk *dp) 97 { 98 struct aac_disk *sc; 99 100 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 101 102 sc = (struct aac_disk *)dp->d_drv1; 103 104 if (sc == NULL) { 105 printf("aac_disk_open: No Softc\n"); 106 return (ENXIO); 107 } 108 109 /* check that the controller is up and running */ 110 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) { 111 device_printf(sc->ad_controller->aac_dev, 112 "Controller Suspended controller state = 0x%x\n", 113 sc->ad_controller->aac_state); 114 return(ENXIO); 115 } 116 117 sc->ad_flags |= AAC_DISK_OPEN; 118 return (0); 119 } 120 121 /* 122 * Handle last close of the disk device. 123 */ 124 static int 125 aac_disk_close(struct disk *dp) 126 { 127 struct aac_disk *sc; 128 129 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 130 131 sc = (struct aac_disk *)dp->d_drv1; 132 133 if (sc == NULL) 134 return (ENXIO); 135 136 sc->ad_flags &= ~AAC_DISK_OPEN; 137 return (0); 138 } 139 140 /* 141 * Handle an I/O request. 142 */ 143 static void 144 aac_disk_strategy(struct bio *bp) 145 { 146 struct aac_disk *sc; 147 148 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 149 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 150 151 /* bogus disk? */ 152 if (sc == NULL) { 153 bp->bio_flags |= BIO_ERROR; 154 bp->bio_error = EINVAL; 155 biodone(bp); 156 return; 157 } 158 159 /* do-nothing operation? */ 160 if (bp->bio_bcount == 0) { 161 bp->bio_resid = bp->bio_bcount; 162 biodone(bp); 163 return; 164 } 165 166 if ((bp->bio_cmd != BIO_READ) && (bp->bio_cmd != BIO_WRITE)) { 167 biofinish(bp, NULL, EOPNOTSUPP); 168 return; 169 } 170 171 /* perform accounting */ 172 173 /* pass the bio to the controller - it can work out who we are */ 174 mtx_lock(&sc->ad_controller->aac_io_lock); 175 aac_submit_bio(bp); 176 mtx_unlock(&sc->ad_controller->aac_io_lock); 177 } 178 179 /* 180 * Map the S/G elements for doing a dump. 181 */ 182 static void 183 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 184 { 185 struct aac_fib *fib; 186 struct aac_blockwrite *bw; 187 struct aac_sg_table *sg; 188 int i; 189 190 fib = (struct aac_fib *)arg; 191 bw = (struct aac_blockwrite *)&fib->data[0]; 192 sg = &bw->SgMap; 193 194 if (sg != NULL) { 195 sg->SgCount = nsegs; 196 for (i = 0; i < nsegs; i++) { 197 if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT) 198 return; 199 sg->SgEntry[i].SgAddress = segs[i].ds_addr; 200 sg->SgEntry[i].SgByteCount = segs[i].ds_len; 201 } 202 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry); 203 } 204 } 205 206 /* 207 * Map the S/G elements for doing a dump on 64-bit capable devices. 208 */ 209 static void 210 aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 211 { 212 struct aac_fib *fib; 213 struct aac_blockwrite64 *bw; 214 struct aac_sg_table64 *sg; 215 int i; 216 217 fib = (struct aac_fib *)arg; 218 bw = (struct aac_blockwrite64 *)&fib->data[0]; 219 sg = &bw->SgMap64; 220 221 if (sg != NULL) { 222 sg->SgCount = nsegs; 223 for (i = 0; i < nsegs; i++) { 224 sg->SgEntry64[i].SgAddress = segs[i].ds_addr; 225 sg->SgEntry64[i].SgByteCount = segs[i].ds_len; 226 } 227 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64); 228 } 229 } 230 231 /* 232 * Dump memory out to an array 233 * 234 * Send out one command at a time with up to maxio of data. 235 */ 236 static int 237 aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length) 238 { 239 struct aac_disk *ad; 240 struct aac_softc *sc; 241 struct aac_fib *fib; 242 size_t len, maxio; 243 int size; 244 static bus_dmamap_t dump_datamap; 245 static int first = 0; 246 struct disk *dp; 247 bus_dmamap_callback_t *callback; 248 u_int32_t command; 249 250 dp = arg; 251 ad = dp->d_drv1; 252 253 if (ad == NULL) 254 return (EINVAL); 255 256 sc= ad->ad_controller; 257 258 if (!first) { 259 first = 1; 260 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) { 261 device_printf(sc->aac_dev, 262 "bus_dmamap_create failed\n"); 263 return (ENOMEM); 264 } 265 } 266 267 /* Skip aac_alloc_sync_fib(). We don't want to mess with sleep locks */ 268 fib = &sc->aac_common->ac_sync_fib; 269 270 while (length > 0) { 271 maxio = sc->aac_max_sectors << 9; 272 len = (length > maxio) ? maxio : length; 273 if ((sc->flags & AAC_FLAGS_SG_64BIT) == 0) { 274 struct aac_blockwrite *bw; 275 bw = (struct aac_blockwrite *)&fib->data[0]; 276 bw->Command = VM_CtBlockWrite; 277 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; 278 bw->BlockNumber = offset / AAC_BLOCK_SIZE; 279 bw->ByteCount = len; 280 bw->Stable = CUNSTABLE; 281 command = ContainerCommand; 282 callback = aac_dump_map_sg; 283 size = sizeof(struct aac_blockwrite); 284 } else { 285 struct aac_blockwrite64 *bw; 286 bw = (struct aac_blockwrite64 *)&fib->data[0]; 287 bw->Command = VM_CtHostWrite64; 288 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; 289 bw->BlockNumber = offset / AAC_BLOCK_SIZE; 290 bw->SectorCount = len / AAC_BLOCK_SIZE; 291 bw->Pad = 0; 292 bw->Flags = 0; 293 command = ContainerCommand64; 294 callback = aac_dump_map_sg64; 295 size = sizeof(struct aac_blockwrite64); 296 } 297 298 /* 299 * There really isn't any way to recover from errors or 300 * resource shortages here. Oh well. Because of that, don't 301 * bother trying to send the command from the callback; there 302 * is too much required context. 303 */ 304 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual, 305 len, callback, fib, BUS_DMA_NOWAIT) != 0) 306 return (ENOMEM); 307 308 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 309 BUS_DMASYNC_PREWRITE); 310 311 /* fib->Header.Size is set in aac_dump_map_sg */ 312 size += fib->Header.Size; 313 314 if (aac_sync_fib(sc, command, 0, fib, size)) { 315 device_printf(sc->aac_dev, 316 "Error dumping block 0x%jx\n", 317 (uintmax_t)physical); 318 return (EIO); 319 } 320 321 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 322 BUS_DMASYNC_POSTWRITE); 323 324 bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap); 325 326 length -= len; 327 offset += len; 328 virtual = (uint8_t *)virtual + len; 329 } 330 331 return (0); 332 } 333 334 /* 335 * Handle completion of an I/O request. 336 */ 337 void 338 aac_biodone(struct bio *bp) 339 { 340 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 341 342 if (bp->bio_flags & BIO_ERROR) { 343 bp->bio_resid = bp->bio_bcount; 344 disk_err(bp, "hard error", -1, 1); 345 } 346 347 biodone(bp); 348 } 349 350 /* 351 * Stub only. 352 */ 353 static int 354 aac_disk_probe(device_t dev) 355 { 356 357 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 358 359 return (0); 360 } 361 362 /* 363 * Attach a unit to the controller. 364 */ 365 static int 366 aac_disk_attach(device_t dev) 367 { 368 struct aac_disk *sc; 369 370 sc = (struct aac_disk *)device_get_softc(dev); 371 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 372 373 /* initialise our softc */ 374 sc->ad_controller = 375 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 376 sc->ad_container = device_get_ivars(dev); 377 sc->ad_dev = dev; 378 379 /* 380 * require that extended translation be enabled - other drivers read the 381 * disk! 382 */ 383 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 384 if (sc->ad_controller->flags & AAC_FLAGS_LBA_64BIT) 385 sc->ad_size += (u_int64_t) 386 sc->ad_container->co_mntobj.CapacityHigh << 32; 387 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 388 sc->ad_heads = 255; 389 sc->ad_sectors = 63; 390 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 391 sc->ad_heads = 128; 392 sc->ad_sectors = 32; 393 } else { 394 sc->ad_heads = 64; 395 sc->ad_sectors = 32; 396 } 397 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 398 399 device_printf(dev, "%juMB (%ju sectors)\n", 400 (intmax_t)sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 401 (intmax_t)sc->ad_size); 402 403 /* attach a generic disk device to ourselves */ 404 sc->unit = device_get_unit(dev); 405 sc->ad_disk = disk_alloc(); 406 sc->ad_disk->d_drv1 = sc; 407 sc->ad_disk->d_flags = DISKFLAG_UNMAPPED_BIO; 408 sc->ad_disk->d_name = "aacd"; 409 sc->ad_disk->d_maxsize = sc->ad_controller->aac_max_sectors << 9; 410 sc->ad_disk->d_open = aac_disk_open; 411 sc->ad_disk->d_close = aac_disk_close; 412 sc->ad_disk->d_strategy = aac_disk_strategy; 413 sc->ad_disk->d_dump = aac_disk_dump; 414 sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE; 415 sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE; 416 sc->ad_disk->d_fwsectors = sc->ad_sectors; 417 sc->ad_disk->d_fwheads = sc->ad_heads; 418 sc->ad_disk->d_unit = sc->unit; 419 disk_create(sc->ad_disk, DISK_VERSION); 420 421 return (0); 422 } 423 424 /* 425 * Disconnect ourselves from the system. 426 */ 427 static int 428 aac_disk_detach(device_t dev) 429 { 430 struct aac_disk *sc; 431 432 sc = (struct aac_disk *)device_get_softc(dev); 433 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 434 435 if (sc->ad_flags & AAC_DISK_OPEN) 436 return(EBUSY); 437 438 disk_destroy(sc->ad_disk); 439 440 return(0); 441 } 442