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