aac_disk.c revision 195614
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: head/sys/dev/aac/aac_disk.c 195614 2009-07-11 08:10:18Z jkim $"); 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 */ 58static int aac_disk_probe(device_t dev); 59static int aac_disk_attach(device_t dev); 60static int aac_disk_detach(device_t dev); 61 62/* 63 * Interface to the device switch. 64 */ 65static disk_open_t aac_disk_open; 66static disk_close_t aac_disk_close; 67static disk_strategy_t aac_disk_strategy; 68static dumper_t aac_disk_dump; 69 70static devclass_t aac_disk_devclass; 71 72static 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 { 0, 0 } 77}; 78 79static driver_t aac_disk_driver = { 80 "aacd", 81 aac_disk_methods, 82 sizeof(struct aac_disk) 83}; 84 85DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0); 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 */ 93static int 94aac_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 printf("Controller Suspended controller state = 0x%x\n", 110 sc->ad_controller->aac_state); 111 return(ENXIO); 112 } 113 114 sc->ad_flags |= AAC_DISK_OPEN; 115 return (0); 116} 117 118/* 119 * Handle last close of the disk device. 120 */ 121static int 122aac_disk_close(struct disk *dp) 123{ 124 struct aac_disk *sc; 125 126 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 127 128 sc = (struct aac_disk *)dp->d_drv1; 129 130 if (sc == NULL) 131 return (ENXIO); 132 133 sc->ad_flags &= ~AAC_DISK_OPEN; 134 return (0); 135} 136 137/* 138 * Handle an I/O request. 139 */ 140static void 141aac_disk_strategy(struct bio *bp) 142{ 143 struct aac_disk *sc; 144 145 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 146 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 147 148 /* bogus disk? */ 149 if (sc == NULL) { 150 bp->bio_flags |= BIO_ERROR; 151 bp->bio_error = EINVAL; 152 biodone(bp); 153 return; 154 } 155 156 /* do-nothing operation? */ 157 if (bp->bio_bcount == 0) { 158 bp->bio_resid = bp->bio_bcount; 159 biodone(bp); 160 return; 161 } 162 163 /* perform accounting */ 164 165 /* pass the bio to the controller - it can work out who we are */ 166 mtx_lock(&sc->ad_controller->aac_io_lock); 167 aac_submit_bio(bp); 168 mtx_unlock(&sc->ad_controller->aac_io_lock); 169 170 return; 171} 172 173/* 174 * Map the S/G elements for doing a dump. 175 */ 176static void 177aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 178{ 179 struct aac_fib *fib; 180 struct aac_blockwrite *bw; 181 struct aac_sg_table *sg; 182 int i; 183 184 fib = (struct aac_fib *)arg; 185 bw = (struct aac_blockwrite *)&fib->data[0]; 186 sg = &bw->SgMap; 187 188 if (sg != NULL) { 189 sg->SgCount = nsegs; 190 for (i = 0; i < nsegs; i++) { 191 if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT) 192 return; 193 sg->SgEntry[i].SgAddress = segs[i].ds_addr; 194 sg->SgEntry[i].SgByteCount = segs[i].ds_len; 195 } 196 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry); 197 } 198} 199 200/* 201 * Map the S/G elements for doing a dump on 64-bit capable devices. 202 */ 203static void 204aac_dump_map_sg64(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 205{ 206 struct aac_fib *fib; 207 struct aac_blockwrite64 *bw; 208 struct aac_sg_table64 *sg; 209 int i; 210 211 fib = (struct aac_fib *)arg; 212 bw = (struct aac_blockwrite64 *)&fib->data[0]; 213 sg = &bw->SgMap64; 214 215 if (sg != NULL) { 216 sg->SgCount = nsegs; 217 for (i = 0; i < nsegs; i++) { 218 sg->SgEntry64[i].SgAddress = segs[i].ds_addr; 219 sg->SgEntry64[i].SgByteCount = segs[i].ds_len; 220 } 221 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry64); 222 } 223} 224 225/* 226 * Dump memory out to an array 227 * 228 * Send out one command at a time with up to maxio of data. 229 */ 230static int 231aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length) 232{ 233 struct aac_disk *ad; 234 struct aac_softc *sc; 235 struct aac_fib *fib; 236 size_t len, maxio; 237 int size; 238 static bus_dmamap_t dump_datamap; 239 static int first = 0; 240 struct disk *dp; 241 bus_dmamap_callback_t *callback; 242 u_int32_t command; 243 244 dp = arg; 245 ad = dp->d_drv1; 246 247 if (ad == NULL) 248 return (EINVAL); 249 250 sc= ad->ad_controller; 251 252 if (!first) { 253 first = 1; 254 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) { 255 printf("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 printf("Error dumping block 0x%jx\n", 309 (uintmax_t)physical); 310 return (EIO); 311 } 312 313 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 314 BUS_DMASYNC_POSTWRITE); 315 316 bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap); 317 318 length -= len; 319 offset += len; 320 virtual = (uint8_t *)virtual + len; 321 } 322 323 return (0); 324} 325 326/* 327 * Handle completion of an I/O request. 328 */ 329void 330aac_biodone(struct bio *bp) 331{ 332 struct aac_disk *sc; 333 334 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 335 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 336 337 if (bp->bio_flags & BIO_ERROR) 338 disk_err(bp, "hard error", -1, 1); 339 340 biodone(bp); 341} 342 343/* 344 * Stub only. 345 */ 346static int 347aac_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 */ 358static int 359aac_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_name = "aacd"; 401 sc->ad_disk->d_maxsize = sc->ad_controller->aac_max_sectors << 9; 402 sc->ad_disk->d_open = aac_disk_open; 403 sc->ad_disk->d_close = aac_disk_close; 404 sc->ad_disk->d_strategy = aac_disk_strategy; 405 sc->ad_disk->d_dump = aac_disk_dump; 406 sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE; 407 sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE; 408 sc->ad_disk->d_fwsectors = sc->ad_sectors; 409 sc->ad_disk->d_fwheads = sc->ad_heads; 410 sc->ad_disk->d_unit = sc->unit; 411 disk_create(sc->ad_disk, DISK_VERSION); 412 413 return (0); 414} 415 416/* 417 * Disconnect ourselves from the system. 418 */ 419static int 420aac_disk_detach(device_t dev) 421{ 422 struct aac_disk *sc; 423 424 sc = (struct aac_disk *)device_get_softc(dev); 425 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 426 427 if (sc->ad_flags & AAC_DISK_OPEN) 428 return(EBUSY); 429 430 disk_destroy(sc->ad_disk); 431 432 return(0); 433} 434