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: src/sys/dev/aac/aac_disk.c,v 1.3.2.8 2003/01/11 18:39:39 scottl Exp $ 30 * $DragonFly: src/sys/dev/raid/aac/aac_disk.c,v 1.20 2008/01/20 03:40:35 pavalos Exp $ 31 */ 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/devicestat.h> 44 #include <sys/disk.h> 45 #include <sys/dtype.h> 46 #include <sys/rman.h> 47 48 #include <vm/vm.h> 49 #include <vm/pmap.h> 50 51 #include <machine/md_var.h> 52 53 #include "aacreg.h" 54 #include "aac_ioctl.h" 55 #include "aacvar.h" 56 57 /* 58 * Interface to parent. 59 */ 60 static int aac_disk_probe(device_t dev); 61 static int aac_disk_attach(device_t dev); 62 static int aac_disk_detach(device_t dev); 63 64 /* 65 * Interface to the device switch. 66 */ 67 static d_open_t aac_disk_open; 68 static d_close_t aac_disk_close; 69 static d_strategy_t aac_disk_strategy; 70 static d_dump_t aac_disk_dump; 71 72 #define AAC_DISK_CDEV_MAJOR 151 73 74 static struct dev_ops aac_disk_ops = { 75 { "aacd", AAC_DISK_CDEV_MAJOR, D_DISK }, 76 .d_open = aac_disk_open, 77 .d_close = aac_disk_close, 78 .d_read = physread, 79 .d_write = physwrite, 80 .d_strategy = aac_disk_strategy, 81 .d_dump = aac_disk_dump, 82 }; 83 84 static devclass_t aac_disk_devclass; 85 86 static device_method_t aac_disk_methods[] = { 87 DEVMETHOD(device_probe, aac_disk_probe), 88 DEVMETHOD(device_attach, aac_disk_attach), 89 DEVMETHOD(device_detach, aac_disk_detach), 90 { 0, 0 } 91 }; 92 93 static driver_t aac_disk_driver = { 94 "aacd", 95 aac_disk_methods, 96 sizeof(struct aac_disk) 97 }; 98 99 #define AAC_MAXIO 65536 100 101 DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0); 102 103 /* sysctl tunables */ 104 static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */ 105 TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max); 106 107 SYSCTL_DECL(_hw_aac); 108 SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RD, &aac_iosize_max, 0, 109 "Max I/O size per transfer to an array"); 110 111 /* 112 * Handle open from generic layer. 113 * 114 * This is called by the diskslice code on first open in order to get the 115 * basic device geometry paramters. 116 */ 117 static int 118 aac_disk_open(struct dev_open_args *ap) 119 { 120 cdev_t dev = ap->a_head.a_dev; 121 struct aac_disk *sc; 122 123 debug_called(0); 124 125 sc = (struct aac_disk *)dev->si_drv1; 126 127 if (sc == NULL) { 128 kprintf("aac_disk_open: No Softc\n"); 129 return (ENXIO); 130 } 131 132 /* check that the controller is up and running */ 133 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) { 134 kprintf("Controller Suspended controller state = 0x%x\n", 135 sc->ad_controller->aac_state); 136 return(ENXIO); 137 } 138 139 /* build synthetic label */ 140 #if 0 141 bzero(&info, sizeof(info)); 142 info.d_media_blksize= AAC_BLOCK_SIZE; /* mandatory */ 143 info.d_media_blocks = sc->ad_size; 144 145 info.d_type = DTYPE_ESDI; /* optional */ 146 info.d_secpertrack = sc->ad_sectors; 147 info.d_nheads = sc->ad_heads; 148 info.d_ncylinders = sc->ad_cylinders; 149 info.d_secpercyl = sc->ad_sectors * sc->ad_heads; 150 151 disk_setdiskinfo(&sc->ad_disk, &info); 152 #endif 153 sc->ad_flags |= AAC_DISK_OPEN; 154 return (0); 155 } 156 157 /* 158 * Handle last close of the disk device. 159 */ 160 static int 161 aac_disk_close(struct dev_close_args *ap) 162 { 163 cdev_t dev = ap->a_head.a_dev; 164 struct aac_disk *sc; 165 166 debug_called(0); 167 168 sc = (struct aac_disk *)dev->si_drv1; 169 170 if (sc == NULL) 171 return (ENXIO); 172 173 sc->ad_flags &= ~AAC_DISK_OPEN; 174 return (0); 175 } 176 177 /* 178 * Handle an I/O request. 179 */ 180 static int 181 aac_disk_strategy(struct dev_strategy_args *ap) 182 { 183 cdev_t dev = ap->a_head.a_dev; 184 struct bio *bio = ap->a_bio; 185 struct buf *bp = bio->bio_buf; 186 struct aac_disk *sc; 187 188 debug_called(4); 189 190 sc = (struct aac_disk *)dev->si_drv1; 191 192 /* bogus disk? */ 193 if (sc == NULL) { 194 bp->b_flags |= B_ERROR; 195 bp->b_error = EINVAL; 196 biodone(bio); 197 return(0); 198 } 199 200 /* do-nothing operation? */ 201 if (bp->b_bcount == 0) { 202 bp->b_resid = bp->b_bcount; 203 biodone(bio); 204 return(0); 205 } 206 207 /* perform accounting */ 208 209 /* pass the bio to the controller - it can work out who we are */ 210 AAC_LOCK_ACQUIRE(&sc->ad_controller->aac_io_lock); 211 devstat_start_transaction(&sc->ad_stats); 212 aac_submit_bio(sc, bio); 213 AAC_LOCK_RELEASE(&sc->ad_controller->aac_io_lock); 214 215 return(0); 216 } 217 218 /* 219 * Dump memory out to an array 220 * 221 * This queues blocks of memory of size AAC_MAXIO to the controller and waits 222 * for the controller to complete the requests. 223 */ 224 static int 225 aac_disk_dump(struct dev_dump_args *ap) 226 { 227 cdev_t dev = ap->a_head.a_dev; 228 struct aac_disk *ad; 229 struct aac_softc *sc; 230 vm_offset_t addr; 231 long blkcnt; 232 int dumppages; 233 int i, error; 234 235 ad = dev->si_drv1; 236 addr = 0; 237 dumppages = AAC_MAXIO / PAGE_SIZE; 238 239 if (ad == NULL) 240 return (ENXIO); 241 242 sc= ad->ad_controller; 243 244 blkcnt = howmany(PAGE_SIZE, ap->a_secsize); 245 246 while (ap->a_count > 0) { 247 caddr_t va = NULL; 248 249 if ((ap->a_count / blkcnt) < dumppages) 250 dumppages = ap->a_count / blkcnt; 251 252 for (i = 0; i < dumppages; ++i) { 253 vm_offset_t a = addr + (i * PAGE_SIZE); 254 if (is_physical_memory(a)) { 255 va = pmap_kenter_temporary(trunc_page(a), i); 256 } else { 257 va = pmap_kenter_temporary(trunc_page(0), i); 258 } 259 } 260 261 retry: 262 /* 263 * Queue the block to the controller. If the queue is full, 264 * EBUSY will be returned. 265 */ 266 error = aac_dump_enqueue(ad, ap->a_blkno, va, dumppages); 267 if (error && (error != EBUSY)) 268 return (error); 269 270 if (!error) { 271 if (dumpstatus(addr, (off_t)(ap->a_count * DEV_BSIZE)) < 0) 272 return (EINTR); 273 274 ap->a_blkno += blkcnt * dumppages; 275 ap->a_count -= blkcnt * dumppages; 276 addr += PAGE_SIZE * dumppages; 277 if (ap->a_count > 0) 278 continue; 279 } 280 281 /* 282 * Either the queue was full on the last attemp, or we have no 283 * more data to dump. Let the queue drain out and retry the 284 * block if the queue was full. 285 */ 286 aac_dump_complete(sc); 287 288 if (error == EBUSY) 289 goto retry; 290 } 291 292 return (0); 293 } 294 295 /* 296 * Handle completion of an I/O request. 297 */ 298 void 299 aac_biodone(struct bio *bio, const char *code) 300 { 301 struct buf *bp = bio->bio_buf; 302 struct aac_disk *sc; 303 304 debug_called(4); 305 306 sc = (struct aac_disk *)bio->bio_driver_info; 307 308 devstat_end_transaction_buf(&sc->ad_stats, bp); 309 if (bp->b_flags & B_ERROR) { 310 diskerr(bio, sc->ad_dev_t, 311 code, 0, 0); 312 } 313 biodone(bio); 314 } 315 316 /* 317 * Stub only. 318 */ 319 static int 320 aac_disk_probe(device_t dev) 321 { 322 323 debug_called(2); 324 325 return (0); 326 } 327 328 /* 329 * Attach a unit to the controller. 330 */ 331 static int 332 aac_disk_attach(device_t dev) 333 { 334 struct disk_info info; 335 struct aac_disk *sc; 336 337 debug_called(0); 338 339 sc = (struct aac_disk *)device_get_softc(dev); 340 341 /* initialise our softc */ 342 sc->ad_controller = 343 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 344 sc->ad_container = device_get_ivars(dev); 345 sc->ad_dev = dev; 346 347 /* 348 * require that extended translation be enabled - other drivers read the 349 * disk! 350 */ 351 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 352 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 353 sc->ad_heads = 255; 354 sc->ad_sectors = 63; 355 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 356 sc->ad_heads = 128; 357 sc->ad_sectors = 32; 358 } else { 359 sc->ad_heads = 64; 360 sc->ad_sectors = 32; 361 } 362 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 363 364 device_printf(dev, "%uMB (%u sectors)\n", 365 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 366 sc->ad_size); 367 368 devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev), 369 AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS, 370 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 371 DEVSTAT_PRIORITY_ARRAY); 372 373 /* attach a generic disk device to ourselves */ 374 sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, 375 &aac_disk_ops); 376 sc->ad_dev_t->si_drv1 = sc; 377 378 sc->ad_dev_t->si_iosize_max = aac_iosize_max; 379 sc->unit = device_get_unit(dev); 380 381 /* 382 * Set disk info, as it appears that all needed data is available already. 383 * Setting the disk info will also cause the probing to start. 384 */ 385 bzero(&info, sizeof(info)); 386 info.d_media_blksize= AAC_BLOCK_SIZE; /* mandatory */ 387 info.d_media_blocks = sc->ad_size; 388 389 info.d_type = DTYPE_ESDI; /* optional */ 390 info.d_secpertrack = sc->ad_sectors; 391 info.d_nheads = sc->ad_heads; 392 info.d_ncylinders = sc->ad_cylinders; 393 info.d_secpercyl = sc->ad_sectors * sc->ad_heads; 394 395 disk_setdiskinfo(&sc->ad_disk, &info); 396 397 return (0); 398 } 399 400 /* 401 * Disconnect ourselves from the system. 402 */ 403 static int 404 aac_disk_detach(device_t dev) 405 { 406 struct aac_disk *sc; 407 408 debug_called(2); 409 410 sc = (struct aac_disk *)device_get_softc(dev); 411 412 if (sc->ad_flags & AAC_DISK_OPEN) 413 return(EBUSY); 414 415 devstat_remove_entry(&sc->ad_stats); 416 disk_destroy(&sc->ad_disk); 417 return(0); 418 } 419