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/sysctl.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 <dev/aac/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 { 0, 0 } 77 }; 78 79 static driver_t aac_disk_driver = { 80 "aacd", 81 aac_disk_methods, 82 sizeof(struct aac_disk) 83 }; 84 85 #define AAC_MAXIO 65536 86 87 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0); 88 89 /* sysctl tunables */ 90 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */ 91 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max); 92 93 SYSCTL_DECL(_hw_aac); 94 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0, 95 "Max I/O size per transfer to an array"); 96 97 /* 98 * Handle open from generic layer. 99 * 100 * This is called by the diskslice code on first open in order to get the 101 * basic device geometry paramters. 102 */ 103 static int 104 aac_disk_open(struct disk *dp) 105 { 106 struct aac_disk *sc; 107 108 debug_called(4); 109 110 sc = (struct aac_disk *)dp->d_drv1; 111 112 if (sc == NULL) { 113 printf("aac_disk_open: No Softc\n"); 114 return (ENXIO); 115 } 116 117 /* check that the controller is up and running */ 118 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) { 119 printf("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 disk *dp) 133 { 134 struct aac_disk *sc; 135 136 debug_called(4); 137 138 sc = (struct aac_disk *)dp->d_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 void 151 aac_disk_strategy(struct bio *bp) 152 { 153 struct aac_disk *sc; 154 155 debug_called(4); 156 157 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 158 159 /* bogus disk? */ 160 if (sc == NULL) { 161 bp->bio_flags |= BIO_ERROR; 162 bp->bio_error = EINVAL; 163 biodone(bp); 164 return; 165 } 166 167 /* do-nothing operation? */ 168 if (bp->bio_bcount == 0) { 169 bp->bio_resid = bp->bio_bcount; 170 biodone(bp); 171 return; 172 } 173 174 /* perform accounting */ 175 176 /* pass the bio to the controller - it can work out who we are */ 177 AAC_LOCK_ACQUIRE(&sc->ad_controller->aac_io_lock); 178 aac_submit_bio(bp); 179 AAC_LOCK_RELEASE(&sc->ad_controller->aac_io_lock); 180 181 return; 182 } 183 184 /* 185 * Map the S/G elements for doing a dump. 186 * 187 * XXX This does not handle >4GB of RAM. Fixing it is possible except on 188 * adapters that cannot do 64bit s/g lists. 189 */ 190 static void 191 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 192 { 193 struct aac_fib *fib; 194 struct aac_blockwrite *bw; 195 struct aac_sg_table *sg; 196 int i; 197 198 fib = (struct aac_fib *)arg; 199 bw = (struct aac_blockwrite *)&fib->data[0]; 200 sg = &bw->SgMap; 201 202 if (sg != NULL) { 203 sg->SgCount = nsegs; 204 for (i = 0; i < nsegs; i++) { 205 if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT) 206 return; 207 sg->SgEntry[i].SgAddress = segs[i].ds_addr; 208 sg->SgEntry[i].SgByteCount = segs[i].ds_len; 209 } 210 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry); 211 } 212 } 213 214 /* 215 * Dump memory out to an array 216 * 217 * Send out one command at a time with up to AAC_MAXIO of data. 218 */ 219 static int 220 aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length) 221 { 222 struct aac_disk *ad; 223 struct aac_softc *sc; 224 struct aac_fib *fib; 225 struct aac_blockwrite *bw; 226 size_t len; 227 int size; 228 static bus_dmamap_t dump_datamap; 229 static int first = 0; 230 struct disk *dp; 231 232 dp = arg; 233 ad = dp->d_drv1; 234 235 if (ad == NULL) 236 return (EINVAL); 237 238 sc= ad->ad_controller; 239 240 if (!first) { 241 first = 1; 242 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) { 243 printf("bus_dmamap_create failed\n"); 244 return (ENOMEM); 245 } 246 } 247 248 aac_alloc_sync_fib(sc, &fib, AAC_SYNC_LOCK_FORCE); 249 bw = (struct aac_blockwrite *)&fib->data[0]; 250 251 while (length > 0) { 252 len = (length > AAC_MAXIO) ? AAC_MAXIO : length; 253 bw->Command = VM_CtBlockWrite; 254 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; 255 bw->BlockNumber = offset / AAC_BLOCK_SIZE; 256 bw->ByteCount = len; 257 bw->Stable = CUNSTABLE; 258 259 /* 260 * There really isn't any way to recover from errors or 261 * resource shortages here. Oh well. Because of that, don't 262 * bother trying to send the command from the callback; there 263 * is too much required context. 264 */ 265 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual, 266 len, aac_dump_map_sg, fib, 0) != 0) 267 return (EIO); 268 269 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 270 BUS_DMASYNC_PREWRITE); 271 272 /* fib->Header.Size is set in aac_dump_map_sg */ 273 size = fib->Header.Size + sizeof(struct aac_blockwrite); 274 275 if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) { 276 printf("Error dumping block 0x%jx\n", 277 (uintmax_t)physical); 278 return (EIO); 279 } 280 281 length -= len; 282 offset += len; 283 (vm_offset_t)virtual += len; 284 } 285 286 return (0); 287 } 288 289 /* 290 * Handle completion of an I/O request. 291 */ 292 void 293 aac_biodone(struct bio *bp) 294 { 295 struct aac_disk *sc; 296 297 debug_called(4); 298 299 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 300 301 if (bp->bio_flags & BIO_ERROR) 302 disk_err(bp, "hard error", -1, 1); 303 304 biodone(bp); 305 } 306 307 /* 308 * Stub only. 309 */ 310 static int 311 aac_disk_probe(device_t dev) 312 { 313 314 debug_called(2); 315 316 return (0); 317 } 318 319 /* 320 * Attach a unit to the controller. 321 */ 322 static int 323 aac_disk_attach(device_t dev) 324 { 325 struct aac_disk *sc; 326 327 debug_called(1); 328 329 sc = (struct aac_disk *)device_get_softc(dev); 330 331 /* initialise our softc */ 332 sc->ad_controller = 333 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 334 sc->ad_container = device_get_ivars(dev); 335 sc->ad_dev = dev; 336 337 /* 338 * require that extended translation be enabled - other drivers read the 339 * disk! 340 */ 341 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 342 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 343 sc->ad_heads = 255; 344 sc->ad_sectors = 63; 345 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 346 sc->ad_heads = 128; 347 sc->ad_sectors = 32; 348 } else { 349 sc->ad_heads = 64; 350 sc->ad_sectors = 32; 351 } 352 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 353 354 device_printf(dev, "%uMB (%u sectors)\n", 355 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 356 sc->ad_size); 357 358 /* attach a generic disk device to ourselves */ 359 sc->unit = device_get_unit(dev); 360 sc->ad_disk.d_drv1 = sc; 361 sc->ad_disk.d_name = "aacd"; 362 sc->ad_disk.d_maxsize = aac_iosize_max; 363 sc->ad_disk.d_open = aac_disk_open; 364 sc->ad_disk.d_close = aac_disk_close; 365 sc->ad_disk.d_strategy = aac_disk_strategy; 366 sc->ad_disk.d_dump = aac_disk_dump; 367 sc->ad_disk.d_sectorsize = AAC_BLOCK_SIZE; 368 sc->ad_disk.d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE; 369 sc->ad_disk.d_fwsectors = sc->ad_sectors; 370 sc->ad_disk.d_fwheads = sc->ad_heads; 371 disk_create(sc->unit, &sc->ad_disk, DISKFLAG_NOGIANT, NULL, NULL); 372 373 return (0); 374 } 375 376 /* 377 * Disconnect ourselves from the system. 378 */ 379 static int 380 aac_disk_detach(device_t dev) 381 { 382 struct aac_disk *sc; 383 384 debug_called(2); 385 386 sc = (struct aac_disk *)device_get_softc(dev); 387 388 if (sc->ad_flags & AAC_DISK_OPEN) 389 return(EBUSY); 390 391 disk_destroy(&sc->ad_disk); 392 393 return(0); 394 } 395