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 <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/disk.h> 42 43 #include <vm/vm.h> 44 #include <vm/pmap.h> 45 46 #include <machine/md_var.h> 47 #include <machine/bus.h> 48 #include <sys/rman.h> 49 50 #include <dev/aac/aacreg.h> 51 #include <dev/aac/aac_ioctl.h> 52 #include <dev/aac/aacvar.h> 53 54 /* 55 * Interface to parent. 56 */ 57 static int aac_disk_probe(device_t dev); 58 static int aac_disk_attach(device_t dev); 59 static int aac_disk_detach(device_t dev); 60 61 /* 62 * Interface to the device switch. 63 */ 64 static disk_open_t aac_disk_open; 65 static disk_close_t aac_disk_close; 66 static disk_strategy_t aac_disk_strategy; 67 static dumper_t aac_disk_dump; 68 69 static devclass_t aac_disk_devclass; 70 71 static device_method_t aac_disk_methods[] = { 72 DEVMETHOD(device_probe, aac_disk_probe), 73 DEVMETHOD(device_attach, aac_disk_attach), 74 DEVMETHOD(device_detach, aac_disk_detach), 75 { 0, 0 } 76 }; 77 78 static driver_t aac_disk_driver = { 79 "aacd", 80 aac_disk_methods, 81 sizeof(struct aac_disk) 82 }; 83 84 #define AAC_MAXIO 65536 85 86 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0); 87 88 /* sysctl tunables */ 89 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */ 90 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max); 91 92 SYSCTL_DECL(_hw_aac); 93 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0, 94 "Max I/O size per transfer to an array"); 95 96 /* 97 * Handle open from generic layer. 98 * 99 * This is called by the diskslice code on first open in order to get the 100 * basic device geometry paramters. 101 */ 102 static int 103 aac_disk_open(struct disk *dp) 104 { 105 struct aac_disk *sc; 106 107 debug_called(4); 108 109 sc = (struct aac_disk *)dp->d_drv1; 110 111 if (sc == NULL) { 112 printf("aac_disk_open: No Softc\n"); 113 return (ENXIO); 114 } 115 116 /* check that the controller is up and running */ 117 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) { 118 printf("Controller Suspended controller state = 0x%x\n", 119 sc->ad_controller->aac_state); 120 return(ENXIO); 121 } 122 123 sc->ad_flags |= AAC_DISK_OPEN; 124 return (0); 125 } 126 127 /* 128 * Handle last close of the disk device. 129 */ 130 static int 131 aac_disk_close(struct disk *dp) 132 { 133 struct aac_disk *sc; 134 135 debug_called(4); 136 137 sc = (struct aac_disk *)dp->d_drv1; 138 139 if (sc == NULL) 140 return (ENXIO); 141 142 sc->ad_flags &= ~AAC_DISK_OPEN; 143 return (0); 144 } 145 146 /* 147 * Handle an I/O request. 148 */ 149 static void 150 aac_disk_strategy(struct bio *bp) 151 { 152 struct aac_disk *sc; 153 154 debug_called(4); 155 156 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 157 158 /* bogus disk? */ 159 if (sc == NULL) { 160 bp->bio_flags |= BIO_ERROR; 161 bp->bio_error = EINVAL; 162 biodone(bp); 163 return; 164 } 165 166 /* do-nothing operation? */ 167 if (bp->bio_bcount == 0) { 168 bp->bio_resid = bp->bio_bcount; 169 biodone(bp); 170 return; 171 } 172 173 /* perform accounting */ 174 175 /* pass the bio to the controller - it can work out who we are */ 176 AAC_LOCK_ACQUIRE(&sc->ad_controller->aac_io_lock); 177 aac_submit_bio(bp); 178 AAC_LOCK_RELEASE(&sc->ad_controller->aac_io_lock); 179 180 return; 181 } 182 183 /* 184 * Map the S/G elements for doing a dump. 185 * 186 * XXX This does not handle >4GB of RAM. Fixing it is possible except on 187 * adapters that cannot do 64bit s/g lists. 188 */ 189 static void 190 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 191 { 192 struct aac_fib *fib; 193 struct aac_blockwrite *bw; 194 struct aac_sg_table *sg; 195 int i; 196 197 fib = (struct aac_fib *)arg; 198 bw = (struct aac_blockwrite *)&fib->data[0]; 199 sg = &bw->SgMap; 200 201 if (sg != NULL) { 202 sg->SgCount = nsegs; 203 for (i = 0; i < nsegs; i++) { 204 if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT) 205 return; 206 sg->SgEntry[i].SgAddress = segs[i].ds_addr; 207 sg->SgEntry[i].SgByteCount = segs[i].ds_len; 208 } 209 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry); 210 } 211 } 212 213 /* 214 * Dump memory out to an array 215 * 216 * Send out one command at a time with up to AAC_MAXIO of data. 217 */ 218 static int 219 aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length) 220 { 221 struct aac_disk *ad; 222 struct aac_softc *sc; 223 struct aac_fib *fib; 224 struct aac_blockwrite *bw; 225 size_t len; 226 int size; 227 static bus_dmamap_t dump_datamap; 228 static int first = 0; 229 struct disk *dp; 230 231 dp = arg; 232 ad = dp->d_drv1; 233 234 if (ad == NULL) 235 return (EINVAL); 236 237 sc= ad->ad_controller; 238 239 if (!first) { 240 first = 1; 241 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) { 242 printf("bus_dmamap_create failed\n"); 243 return (ENOMEM); 244 } 245 } 246 247 aac_alloc_sync_fib(sc, &fib, AAC_SYNC_LOCK_FORCE); 248 bw = (struct aac_blockwrite *)&fib->data[0]; 249 250 while (length > 0) { 251 len = (length > AAC_MAXIO) ? AAC_MAXIO : length; 252 bw->Command = VM_CtBlockWrite; 253 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; 254 bw->BlockNumber = offset / AAC_BLOCK_SIZE; 255 bw->ByteCount = len; 256 bw->Stable = CUNSTABLE; 257 258 /* 259 * There really isn't any way to recover from errors or 260 * resource shortages here. Oh well. Because of that, don't 261 * bother trying to send the command from the callback; there 262 * is too much required context. 263 */ 264 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual, 265 len, aac_dump_map_sg, fib, 0) != 0) 266 return (EIO); 267 268 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 269 BUS_DMASYNC_PREWRITE); 270 271 /* fib->Header.Size is set in aac_dump_map_sg */ 272 size = fib->Header.Size + sizeof(struct aac_blockwrite); 273 274 if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) { 275 printf("Error dumping block 0x%x\n", physical); 276 return (EIO); 277 } 278 279 length -= len; 280 offset += len; 281 (vm_offset_t)virtual += len; 282 } 283 284 return (0); 285 } 286 287 /* 288 * Handle completion of an I/O request. 289 */ 290 void 291 aac_biodone(struct bio *bp) 292 { 293 struct aac_disk *sc; 294 295 debug_called(4); 296 297 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 298 299 if (bp->bio_flags & BIO_ERROR) 300 disk_err(bp, "hard error", -1, 1); 301 302 biodone(bp); 303 } 304 305 /* 306 * Stub only. 307 */ 308 static int 309 aac_disk_probe(device_t dev) 310 { 311 312 debug_called(2); 313 314 return (0); 315 } 316 317 /* 318 * Attach a unit to the controller. 319 */ 320 static int 321 aac_disk_attach(device_t dev) 322 { 323 struct aac_disk *sc; 324 325 debug_called(1); 326 327 sc = (struct aac_disk *)device_get_softc(dev); 328 329 /* initialise our softc */ 330 sc->ad_controller = 331 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 332 sc->ad_container = device_get_ivars(dev); 333 sc->ad_dev = dev; 334 335 /* 336 * require that extended translation be enabled - other drivers read the 337 * disk! 338 */ 339 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 340 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 341 sc->ad_heads = 255; 342 sc->ad_sectors = 63; 343 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 344 sc->ad_heads = 128; 345 sc->ad_sectors = 32; 346 } else { 347 sc->ad_heads = 64; 348 sc->ad_sectors = 32; 349 } 350 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 351 352 device_printf(dev, "%uMB (%u sectors)\n", 353 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 354 sc->ad_size); 355 356 /* attach a generic disk device to ourselves */ 357 sc->unit = device_get_unit(dev); 358 sc->ad_disk.d_drv1 = sc; 359 sc->ad_disk.d_name = "aacd"; 360 sc->ad_disk.d_maxsize = aac_iosize_max; 361 sc->ad_disk.d_open = aac_disk_open; 362 sc->ad_disk.d_close = aac_disk_close; 363 sc->ad_disk.d_strategy = aac_disk_strategy; 364 sc->ad_disk.d_dump = aac_disk_dump; 365 sc->ad_disk.d_sectorsize = AAC_BLOCK_SIZE; 366 sc->ad_disk.d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE; 367 sc->ad_disk.d_fwsectors = sc->ad_sectors; 368 sc->ad_disk.d_fwheads = sc->ad_heads; 369 disk_create(sc->unit, &sc->ad_disk, DISKFLAG_NOGIANT, NULL, NULL); 370 371 return (0); 372 } 373 374 /* 375 * Disconnect ourselves from the system. 376 */ 377 static int 378 aac_disk_detach(device_t dev) 379 { 380 struct aac_disk *sc; 381 382 debug_called(2); 383 384 sc = (struct aac_disk *)device_get_softc(dev); 385 386 if (sc->ad_flags & AAC_DISK_OPEN) 387 return(EBUSY); 388 389 disk_destroy(&sc->ad_disk); 390 391 return(0); 392 } 393