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 static void 187 aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 188 { 189 struct aac_fib *fib; 190 struct aac_blockwrite *bw; 191 struct aac_sg_table *sg; 192 int i; 193 194 fib = (struct aac_fib *)arg; 195 bw = (struct aac_blockwrite *)&fib->data[0]; 196 sg = &bw->SgMap; 197 198 if (sg != NULL) { 199 sg->SgCount = nsegs; 200 for (i = 0; i < nsegs; i++) { 201 sg->SgEntry[i].SgAddress = segs[i].ds_addr; 202 sg->SgEntry[i].SgByteCount = segs[i].ds_len; 203 } 204 fib->Header.Size = nsegs * sizeof(struct aac_sg_entry); 205 } 206 } 207 208 /* 209 * Dump memory out to an array 210 * 211 * Send out one command at a time with up to AAC_MAXIO of data. 212 */ 213 static int 214 aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length) 215 { 216 struct aac_disk *ad; 217 struct aac_softc *sc; 218 struct aac_fib *fib; 219 struct aac_blockwrite *bw; 220 size_t len; 221 int size; 222 static bus_dmamap_t dump_datamap; 223 static int first = 0; 224 struct disk *dp; 225 226 dp = arg; 227 ad = dp->d_drv1; 228 229 if (ad == NULL) 230 return (EINVAL); 231 232 sc= ad->ad_controller; 233 234 if (!first) { 235 first = 1; 236 if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) { 237 printf("bus_dmamap_create failed\n"); 238 return (ENOMEM); 239 } 240 } 241 242 aac_alloc_sync_fib(sc, &fib, AAC_SYNC_LOCK_FORCE); 243 bw = (struct aac_blockwrite *)&fib->data[0]; 244 245 while (length > 0) { 246 len = (length > AAC_MAXIO) ? AAC_MAXIO : length; 247 bw->Command = VM_CtBlockWrite; 248 bw->ContainerId = ad->ad_container->co_mntobj.ObjectId; 249 bw->BlockNumber = offset / AAC_BLOCK_SIZE; 250 bw->ByteCount = len; 251 bw->Stable = CUNSTABLE; 252 bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual, 253 len, aac_dump_map_sg, fib, 0); 254 bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap, 255 BUS_DMASYNC_PREWRITE); 256 257 /* fib->Header.Size is set in aac_dump_map_sg */ 258 size = fib->Header.Size + sizeof(struct aac_blockwrite); 259 260 if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) { 261 printf("Error dumping block 0x%x\n", physical); 262 return (EIO); 263 } 264 length -= len; 265 offset += len; 266 } 267 268 return (0); 269 } 270 271 /* 272 * Handle completion of an I/O request. 273 */ 274 void 275 aac_biodone(struct bio *bp) 276 { 277 struct aac_disk *sc; 278 279 debug_called(4); 280 281 sc = (struct aac_disk *)bp->bio_disk->d_drv1; 282 283 if (bp->bio_flags & BIO_ERROR) 284 disk_err(bp, "hard error", -1, 1); 285 286 biodone(bp); 287 } 288 289 /* 290 * Stub only. 291 */ 292 static int 293 aac_disk_probe(device_t dev) 294 { 295 296 debug_called(2); 297 298 return (0); 299 } 300 301 /* 302 * Attach a unit to the controller. 303 */ 304 static int 305 aac_disk_attach(device_t dev) 306 { 307 struct aac_disk *sc; 308 309 debug_called(1); 310 311 sc = (struct aac_disk *)device_get_softc(dev); 312 313 /* initialise our softc */ 314 sc->ad_controller = 315 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 316 sc->ad_container = device_get_ivars(dev); 317 sc->ad_dev = dev; 318 319 /* 320 * require that extended translation be enabled - other drivers read the 321 * disk! 322 */ 323 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 324 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 325 sc->ad_heads = 255; 326 sc->ad_sectors = 63; 327 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 328 sc->ad_heads = 128; 329 sc->ad_sectors = 32; 330 } else { 331 sc->ad_heads = 64; 332 sc->ad_sectors = 32; 333 } 334 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 335 336 device_printf(dev, "%uMB (%u sectors)\n", 337 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 338 sc->ad_size); 339 340 /* attach a generic disk device to ourselves */ 341 sc->unit = device_get_unit(dev); 342 sc->ad_disk.d_drv1 = sc; 343 sc->ad_disk.d_name = "aacd"; 344 sc->ad_disk.d_maxsize = aac_iosize_max; 345 sc->ad_disk.d_open = aac_disk_open; 346 sc->ad_disk.d_close = aac_disk_close; 347 sc->ad_disk.d_strategy = aac_disk_strategy; 348 sc->ad_disk.d_dump = aac_disk_dump; 349 sc->ad_disk.d_sectorsize = AAC_BLOCK_SIZE; 350 sc->ad_disk.d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE; 351 sc->ad_disk.d_fwsectors = sc->ad_sectors; 352 sc->ad_disk.d_fwheads = sc->ad_heads; 353 disk_create(sc->unit, &sc->ad_disk, DISKFLAG_NOGIANT, NULL, NULL); 354 355 return (0); 356 } 357 358 /* 359 * Disconnect ourselves from the system. 360 */ 361 static int 362 aac_disk_detach(device_t dev) 363 { 364 struct aac_disk *sc; 365 366 debug_called(2); 367 368 sc = (struct aac_disk *)device_get_softc(dev); 369 370 if (sc->ad_flags & AAC_DISK_OPEN) 371 return(EBUSY); 372 373 disk_destroy(&sc->ad_disk); 374 375 return(0); 376 } 377