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 #include <sys/sysctl.h> 40 41 #include <sys/bus.h> 42 #include <sys/conf.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 <sys/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 disk_open_t aac_disk_open; 67 static disk_close_t aac_disk_close; 68 static disk_strategy_t aac_disk_strategy; 69 static dumper_t aac_disk_dump; 70 71 static devclass_t aac_disk_devclass; 72 73 static device_method_t aac_disk_methods[] = { 74 DEVMETHOD(device_probe, aac_disk_probe), 75 DEVMETHOD(device_attach, aac_disk_attach), 76 DEVMETHOD(device_detach, aac_disk_detach), 77 { 0, 0 } 78 }; 79 80 static driver_t aac_disk_driver = { 81 "aacd", 82 aac_disk_methods, 83 sizeof(struct aac_disk) 84 }; 85 86 #define AAC_MAXIO 65536 87 88 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0); 89 90 /* sysctl tunables */ 91 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */ 92 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max); 93 94 SYSCTL_DECL(_hw_aac); 95 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RDTUN, &aac_iosize_max, 0, 96 "Max I/O size per transfer to an array"); 97 98 /* 99 * Handle open from generic layer. 100 * 101 * This is called by the diskslice code on first open in order to get the 102 * basic device geometry paramters. 103 */ 104 static int 105 aac_disk_open(struct disk *dp) 106 { 107 struct aac_disk *sc; 108 109 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 110 111 sc = (struct aac_disk *)dp->d_drv1; 112 113 if (sc == NULL) { 114 printf("aac_disk_open: No Softc\n"); 115 return (ENXIO); 116 } 117 118 /* check that the controller is up and running */ 119 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) { 120 printf("Controller Suspended controller state = 0x%x\n", 121 sc->ad_controller->aac_state); 122 return(ENXIO); 123 } 124 125 sc->ad_flags |= AAC_DISK_OPEN; 126 return (0); 127 } 128 129 /* 130 * Handle last close of the disk device. 131 */ 132 static int 133 aac_disk_close(struct disk *dp) 134 { 135 struct aac_disk *sc; 136 137 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 138 139 sc = (struct aac_disk *)dp->d_drv1; 140 141 if (sc == NULL) 142 return (ENXIO); 143 144 sc->ad_flags &= ~AAC_DISK_OPEN; 145 return (0); 146 } 147 148 /* 149 * Handle an I/O request. 150 */ 151 static void 152 aac_disk_strategy(struct bio *bp) 153 { 154 struct aac_disk *sc; 155 156 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 157 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 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 mtx_lock(&sc->ad_controller->aac_io_lock); 178 aac_submit_bio(bp); 179 mtx_unlock(&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 /* Skip aac_alloc_sync_fib(). We don't want to mess with sleep locks */ 249 fib = &sc->aac_common->ac_sync_fib; 250 bw = (struct aac_blockwrite *)&fib->data[0]; 251 252 while (length > 0) { 253 len = (length > AAC_MAXIO) ? AAC_MAXIO : length; 254 bw->Command = VM_CtBlockWrite; 255 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; 256 bw->BlockNumber = offset / AAC_BLOCK_SIZE; 257 bw->ByteCount = len; 258 bw->Stable = CUNSTABLE; 259 260 /* 261 * There really isn't any way to recover from errors or 262 * resource shortages here. Oh well. Because of that, don't 263 * bother trying to send the command from the callback; there 264 * is too much required context. 265 */ 266 if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual, 267 len, aac_dump_map_sg, fib, BUS_DMA_NOWAIT) != 0) 268 return (ENOMEM); 269 270 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 271 BUS_DMASYNC_PREWRITE); 272 273 /* fib->Header.Size is set in aac_dump_map_sg */ 274 size = fib->Header.Size + sizeof(struct aac_blockwrite); 275 276 if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) { 277 printf("Error dumping block 0x%jx\n", 278 (uintmax_t)physical); 279 return (EIO); 280 } 281 282 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 283 BUS_DMASYNC_POSTWRITE); 284 285 bus_dmamap_unload(sc->aac_buffer_dmat, dump_datamap); 286 287 length -= len; 288 offset += len; 289 virtual = (uint8_t *)virtual + len; 290 } 291 292 return (0); 293 } 294 295 /* 296 * Handle completion of an I/O request. 297 */ 298 void 299 aac_biodone(struct bio *bp) 300 { 301 struct aac_disk *sc; 302 303 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 304 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 305 306 if (bp->bio_flags & BIO_ERROR) 307 disk_err(bp, "hard error", -1, 1); 308 309 biodone(bp); 310 } 311 312 /* 313 * Stub only. 314 */ 315 static int 316 aac_disk_probe(device_t dev) 317 { 318 319 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 320 321 return (0); 322 } 323 324 /* 325 * Attach a unit to the controller. 326 */ 327 static int 328 aac_disk_attach(device_t dev) 329 { 330 struct aac_disk *sc; 331 332 sc = (struct aac_disk *)device_get_softc(dev); 333 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 334 335 /* initialise our softc */ 336 sc->ad_controller = 337 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 338 sc->ad_container = device_get_ivars(dev); 339 sc->ad_dev = dev; 340 341 /* 342 * require that extended translation be enabled - other drivers read the 343 * disk! 344 */ 345 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 346 if (sc->ad_controller->flags & AAC_FLAGS_LBA_64BIT) 347 sc->ad_size += (u_int64_t) 348 sc->ad_container->co_mntobj.CapacityHigh << 32; 349 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 350 sc->ad_heads = 255; 351 sc->ad_sectors = 63; 352 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 353 sc->ad_heads = 128; 354 sc->ad_sectors = 32; 355 } else { 356 sc->ad_heads = 64; 357 sc->ad_sectors = 32; 358 } 359 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 360 361 device_printf(dev, "%juMB (%ju sectors)\n", 362 (intmax_t)sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 363 (intmax_t)sc->ad_size); 364 365 /* attach a generic disk device to ourselves */ 366 sc->unit = device_get_unit(dev); 367 sc->ad_disk = disk_alloc(); 368 sc->ad_disk->d_drv1 = sc; 369 sc->ad_disk->d_name = "aacd"; 370 sc->ad_disk->d_maxsize = aac_iosize_max; 371 sc->ad_disk->d_open = aac_disk_open; 372 sc->ad_disk->d_close = aac_disk_close; 373 sc->ad_disk->d_strategy = aac_disk_strategy; 374 sc->ad_disk->d_dump = aac_disk_dump; 375 sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE; 376 sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE; 377 sc->ad_disk->d_fwsectors = sc->ad_sectors; 378 sc->ad_disk->d_fwheads = sc->ad_heads; 379 sc->ad_disk->d_unit = sc->unit; 380 disk_create(sc->ad_disk, DISK_VERSION); 381 382 return (0); 383 } 384 385 /* 386 * Disconnect ourselves from the system. 387 */ 388 static int 389 aac_disk_detach(device_t dev) 390 { 391 struct aac_disk *sc; 392 393 sc = (struct aac_disk *)device_get_softc(dev); 394 fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, ""); 395 396 if (sc->ad_flags & AAC_DISK_OPEN) 397 return(EBUSY); 398 399 disk_destroy(sc->ad_disk); 400 401 return(0); 402 } 403