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 * $FreeBSD$ 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/sysctl.h> 38 39 #include <dev/aac/aac_compat.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/devicestat.h> 43 #include <sys/disk.h> 44 45 #include <vm/vm.h> 46 #include <vm/pmap.h> 47 48 #include <machine/md_var.h> 49 #include <machine/bus.h> 50 #include <sys/rman.h> 51 52 #include <dev/aac/aacreg.h> 53 #include <dev/aac/aac_ioctl.h> 54 #include <dev/aac/aacvar.h> 55 56 /* 57 * Interface to parent. 58 */ 59 static int aac_disk_probe(device_t dev); 60 static int aac_disk_attach(device_t dev); 61 static int aac_disk_detach(device_t dev); 62 63 /* 64 * Interface to the device switch. 65 */ 66 static d_open_t aac_disk_open; 67 static d_close_t aac_disk_close; 68 static d_strategy_t aac_disk_strategy; 69 static d_dump_t aac_disk_dump; 70 71 #define AAC_DISK_CDEV_MAJOR 151 72 73 static struct cdevsw aac_disk_cdevsw = { 74 /* open */ aac_disk_open, 75 /* close */ aac_disk_close, 76 /* read */ physread, 77 /* write */ physwrite, 78 /* ioctl */ noioctl, 79 /* poll */ nopoll, 80 /* mmap */ nommap, 81 /* strategy */ aac_disk_strategy, 82 /* name */ "aacd", 83 /* maj */ AAC_DISK_CDEV_MAJOR, 84 /* dump */ aac_disk_dump, 85 /* psize */ nopsize, 86 /* flags */ D_DISK, 87 #if __FreeBSD_version < 500005 88 /* bmaj */ -1 89 #endif 90 }; 91 92 static devclass_t aac_disk_devclass; 93 static struct cdevsw aac_disk_disk_cdevsw; 94 #ifdef FREEBSD_4 95 static int disks_registered = 0; 96 #endif 97 98 static device_method_t aac_disk_methods[] = { 99 DEVMETHOD(device_probe, aac_disk_probe), 100 DEVMETHOD(device_attach, aac_disk_attach), 101 DEVMETHOD(device_detach, aac_disk_detach), 102 { 0, 0 } 103 }; 104 105 static driver_t aac_disk_driver = { 106 "aacd", 107 aac_disk_methods, 108 sizeof(struct aac_disk) 109 }; 110 111 #define AAC_MAXIO 65536 112 113 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0); 114 115 /* sysctl tunables */ 116 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */ 117 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max); 118 119 SYSCTL_DECL(_hw_aac); 120 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0, 121 "Max I/O size per transfer to an array"); 122 123 /* 124 * Handle open from generic layer. 125 * 126 * This is called by the diskslice code on first open in order to get the 127 * basic device geometry paramters. 128 */ 129 static int 130 aac_disk_open(dev_t dev, int flags, int fmt, d_thread_t *td) 131 { 132 struct aac_disk *sc; 133 struct disklabel *label; 134 135 debug_called(4); 136 137 sc = (struct aac_disk *)dev->si_drv1; 138 139 if (sc == NULL) 140 return (ENXIO); 141 142 /* check that the controller is up and running */ 143 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) 144 return(ENXIO); 145 146 /* build synthetic label */ 147 label = &sc->ad_disk.d_label; 148 bzero(label, sizeof(*label)); 149 label->d_type = DTYPE_ESDI; 150 label->d_secsize = AAC_BLOCK_SIZE; 151 label->d_nsectors = sc->ad_sectors; 152 label->d_ntracks = sc->ad_heads; 153 label->d_ncylinders = sc->ad_cylinders; 154 label->d_secpercyl = sc->ad_sectors * sc->ad_heads; 155 label->d_secperunit = sc->ad_size; 156 157 sc->ad_flags |= AAC_DISK_OPEN; 158 return (0); 159 } 160 161 /* 162 * Handle last close of the disk device. 163 */ 164 static int 165 aac_disk_close(dev_t dev, int flags, int fmt, d_thread_t *td) 166 { 167 struct aac_disk *sc; 168 169 debug_called(4); 170 171 sc = (struct aac_disk *)dev->si_drv1; 172 173 if (sc == NULL) 174 return (ENXIO); 175 176 sc->ad_flags &= ~AAC_DISK_OPEN; 177 return (0); 178 } 179 180 /* 181 * Handle an I/O request. 182 */ 183 static void 184 aac_disk_strategy(struct bio *bp) 185 { 186 struct aac_disk *sc; 187 188 debug_called(4); 189 190 sc = (struct aac_disk *)bp->bio_dev->si_drv1; 191 192 /* bogus disk? */ 193 if (sc == NULL) { 194 bp->bio_flags |= BIO_ERROR; 195 bp->bio_error = EINVAL; 196 biodone(bp); 197 return; 198 } 199 200 /* do-nothing operation? */ 201 if (bp->bio_bcount == 0) { 202 bp->bio_resid = bp->bio_bcount; 203 biodone(bp); 204 return; 205 } 206 207 /* perform accounting */ 208 devstat_start_transaction(&sc->ad_stats); 209 210 /* pass the bio to the controller - it can work out who we are */ 211 aac_submit_bio(bp); 212 return; 213 } 214 215 /* 216 * Map the S/G elements for doing a dump. 217 */ 218 static void 219 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 220 { 221 struct aac_fib *fib; 222 struct aac_blockwrite *bw; 223 struct aac_sg_table *sg; 224 int i; 225 226 fib = (struct aac_fib *)arg; 227 bw = (struct aac_blockwrite *)&fib->data[0]; 228 sg = &bw->SgMap; 229 230 if (sg != NULL) { 231 sg->SgCount = nsegs; 232 for (i = 0; i < nsegs; i++) { 233 sg->SgEntry[i].SgAddress = segs[i].ds_addr; 234 sg->SgEntry[i].SgByteCount = segs[i].ds_len; 235 } 236 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry); 237 } 238 } 239 240 /* 241 * Dump memory out to an array 242 * 243 * Send out one command at a time with up to AAC_MAXIO of data. 244 */ 245 static int 246 aac_disk_dump(dev_t dev, void *virtual, vm_offset_t physical, off_t offset, size_t length) 247 { 248 struct aac_disk *ad; 249 struct aac_softc *sc; 250 struct aac_fib *fib; 251 struct aac_blockwrite *bw; 252 size_t len; 253 int size; 254 static bus_dmamap_t dump_datamap; 255 static int first = 0; 256 257 ad = dev->si_drv1; 258 259 if (ad == NULL) 260 return (EINVAL); 261 262 sc= ad->ad_controller; 263 264 if (!first) { 265 first = 1; 266 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) { 267 printf("bus_dmamap_create failed\n"); 268 return (ENOMEM); 269 } 270 } 271 272 aac_alloc_sync_fib(sc, &fib, AAC_SYNC_LOCK_FORCE); 273 bw = (struct aac_blockwrite *)&fib->data[0]; 274 275 while (length > 0) { 276 len = (length > AAC_MAXIO) ? AAC_MAXIO : length; 277 bw->Command = VM_CtBlockWrite; 278 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; 279 bw->BlockNumber = offset / AAC_BLOCK_SIZE; 280 bw->ByteCount = len; 281 bw->Stable = CUNSTABLE; 282 bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual, 283 len, aac_dump_map_sg, fib, 0); 284 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 285 BUS_DMASYNC_PREWRITE); 286 287 /* fib->Header.Size is set in aac_dump_map_sg */ 288 size = fib->Header.Size + sizeof(struct aac_blockwrite); 289 290 if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) { 291 printf("Error dumping block 0x%x\n", physical); 292 return (EIO); 293 } 294 length -= len; 295 offset += len; 296 } 297 298 return (0); 299 } 300 301 /* 302 * Handle completion of an I/O request. 303 */ 304 void 305 aac_biodone(struct bio *bp) 306 { 307 struct aac_disk *sc; 308 int blkno; 309 310 debug_called(4); 311 312 sc = (struct aac_disk *)bp->bio_dev->si_drv1; 313 314 devstat_end_transaction_bio(&sc->ad_stats, bp); 315 if (bp->bio_flags & BIO_ERROR) { 316 blkno = (sc->ad_label.d_nsectors) ? 0 : -1; 317 #if __FreeBSD_version > 500005 318 diskerr(bp, (char *)bp->bio_driver1, blkno, &sc->ad_label); 319 #else 320 diskerr(bp, (char *)bp->bio_driver1, 0, blkno, &sc->ad_label); 321 #endif 322 } 323 biodone(bp); 324 } 325 326 /* 327 * Stub only. 328 */ 329 static int 330 aac_disk_probe(device_t dev) 331 { 332 333 debug_called(2); 334 335 return (0); 336 } 337 338 /* 339 * Attach a unit to the controller. 340 */ 341 static int 342 aac_disk_attach(device_t dev) 343 { 344 struct aac_disk *sc; 345 346 debug_called(1); 347 348 sc = (struct aac_disk *)device_get_softc(dev); 349 350 /* initialise our softc */ 351 sc->ad_controller = 352 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 353 sc->ad_container = device_get_ivars(dev); 354 sc->ad_dev = dev; 355 356 /* 357 * require that extended translation be enabled - other drivers read the 358 * disk! 359 */ 360 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 361 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 362 sc->ad_heads = 255; 363 sc->ad_sectors = 63; 364 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 365 sc->ad_heads = 128; 366 sc->ad_sectors = 32; 367 } else { 368 sc->ad_heads = 64; 369 sc->ad_sectors = 32; 370 } 371 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 372 373 device_printf(dev, "%uMB (%u sectors)\n", 374 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 375 sc->ad_size); 376 377 devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev), 378 AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS, 379 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 380 DEVSTAT_PRIORITY_ARRAY); 381 382 /* attach a generic disk device to ourselves */ 383 sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, 0, 384 &aac_disk_cdevsw, &aac_disk_disk_cdevsw); 385 sc->ad_dev_t->si_drv1 = sc; 386 #ifdef FREEBSD_4 387 disks_registered++; 388 #endif 389 390 sc->ad_dev_t->si_iosize_max = aac_iosize_max; 391 sc->unit = device_get_unit(dev); 392 393 return (0); 394 } 395 396 /* 397 * Disconnect ourselves from the system. 398 */ 399 static int 400 aac_disk_detach(device_t dev) 401 { 402 struct aac_disk *sc; 403 404 debug_called(2); 405 406 sc = (struct aac_disk *)device_get_softc(dev); 407 408 if (sc->ad_flags & AAC_DISK_OPEN) 409 return(EBUSY); 410 411 devstat_remove_entry(&sc->ad_stats); 412 disk_destroy(sc->ad_dev_t); 413 #ifdef FREEBSD_4 414 if (--disks_registered == 0) 415 cdevsw_remove(&aac_disk_cdevsw); 416 #endif 417 418 return(0); 419 } 420