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 struct disk_info info; 123 124 debug_called(0); 125 126 sc = (struct aac_disk *)dev->si_drv1; 127 128 if (sc == NULL) { 129 kprintf("aac_disk_open: No Softc\n"); 130 return (ENXIO); 131 } 132 133 /* check that the controller is up and running */ 134 if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) { 135 kprintf("Controller Suspended controller state = 0x%x\n", 136 sc->ad_controller->aac_state); 137 return(ENXIO); 138 } 139 140 /* build synthetic label */ 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 sc->ad_flags |= AAC_DISK_OPEN; 153 return (0); 154 } 155 156 /* 157 * Handle last close of the disk device. 158 */ 159 static int 160 aac_disk_close(struct dev_close_args *ap) 161 { 162 cdev_t dev = ap->a_head.a_dev; 163 struct aac_disk *sc; 164 165 debug_called(0); 166 167 sc = (struct aac_disk *)dev->si_drv1; 168 169 if (sc == NULL) 170 return (ENXIO); 171 172 sc->ad_flags &= ~AAC_DISK_OPEN; 173 return (0); 174 } 175 176 /* 177 * Handle an I/O request. 178 */ 179 static int 180 aac_disk_strategy(struct dev_strategy_args *ap) 181 { 182 cdev_t dev = ap->a_head.a_dev; 183 struct bio *bio = ap->a_bio; 184 struct buf *bp = bio->bio_buf; 185 struct aac_disk *sc; 186 187 debug_called(4); 188 189 sc = (struct aac_disk *)dev->si_drv1; 190 191 /* bogus disk? */ 192 if (sc == NULL) { 193 bp->b_flags |= B_ERROR; 194 bp->b_error = EINVAL; 195 biodone(bio); 196 return(0); 197 } 198 199 /* do-nothing operation? */ 200 if (bp->b_bcount == 0) { 201 bp->b_resid = bp->b_bcount; 202 biodone(bio); 203 return(0); 204 } 205 206 /* perform accounting */ 207 208 /* pass the bio to the controller - it can work out who we are */ 209 AAC_LOCK_ACQUIRE(&sc->ad_controller->aac_io_lock); 210 devstat_start_transaction(&sc->ad_stats); 211 aac_submit_bio(sc, bio); 212 AAC_LOCK_RELEASE(&sc->ad_controller->aac_io_lock); 213 214 return(0); 215 } 216 217 /* 218 * Dump memory out to an array 219 * 220 * This queues blocks of memory of size AAC_MAXIO to the controller and waits 221 * for the controller to complete the requests. 222 */ 223 static int 224 aac_disk_dump(struct dev_dump_args *ap) 225 { 226 cdev_t dev = ap->a_head.a_dev; 227 struct aac_disk *ad; 228 struct aac_softc *sc; 229 vm_offset_t addr; 230 long blkcnt; 231 int dumppages; 232 int i, error; 233 234 ad = dev->si_drv1; 235 addr = 0; 236 dumppages = AAC_MAXIO / PAGE_SIZE; 237 238 if (ad == NULL) 239 return (ENXIO); 240 241 sc= ad->ad_controller; 242 243 blkcnt = howmany(PAGE_SIZE, ap->a_secsize); 244 245 while (ap->a_count > 0) { 246 caddr_t va = NULL; 247 248 if ((ap->a_count / blkcnt) < dumppages) 249 dumppages = ap->a_count / blkcnt; 250 251 for (i = 0; i < dumppages; ++i) { 252 vm_offset_t a = addr + (i * PAGE_SIZE); 253 if (is_physical_memory(a)) { 254 va = pmap_kenter_temporary(trunc_page(a), i); 255 } else { 256 va = pmap_kenter_temporary(trunc_page(0), i); 257 } 258 } 259 260 retry: 261 /* 262 * Queue the block to the controller. If the queue is full, 263 * EBUSY will be returned. 264 */ 265 error = aac_dump_enqueue(ad, ap->a_blkno, va, dumppages); 266 if (error && (error != EBUSY)) 267 return (error); 268 269 if (!error) { 270 if (dumpstatus(addr, (off_t)(ap->a_count * DEV_BSIZE)) < 0) 271 return (EINTR); 272 273 ap->a_blkno += blkcnt * dumppages; 274 ap->a_count -= blkcnt * dumppages; 275 addr += PAGE_SIZE * dumppages; 276 if (ap->a_count > 0) 277 continue; 278 } 279 280 /* 281 * Either the queue was full on the last attemp, or we have no 282 * more data to dump. Let the queue drain out and retry the 283 * block if the queue was full. 284 */ 285 aac_dump_complete(sc); 286 287 if (error == EBUSY) 288 goto retry; 289 } 290 291 return (0); 292 } 293 294 /* 295 * Handle completion of an I/O request. 296 */ 297 void 298 aac_biodone(struct bio *bio, const char *code) 299 { 300 struct buf *bp = bio->bio_buf; 301 struct aac_disk *sc; 302 303 debug_called(4); 304 305 sc = (struct aac_disk *)bio->bio_driver_info; 306 307 devstat_end_transaction_buf(&sc->ad_stats, bp); 308 if (bp->b_flags & B_ERROR) { 309 diskerr(bio, sc->ad_dev_t, 310 code, 0, 0); 311 } 312 biodone(bio); 313 } 314 315 /* 316 * Stub only. 317 */ 318 static int 319 aac_disk_probe(device_t dev) 320 { 321 322 debug_called(2); 323 324 return (0); 325 } 326 327 /* 328 * Attach a unit to the controller. 329 */ 330 static int 331 aac_disk_attach(device_t dev) 332 { 333 struct aac_disk *sc; 334 335 debug_called(0); 336 337 sc = (struct aac_disk *)device_get_softc(dev); 338 339 /* initialise our softc */ 340 sc->ad_controller = 341 (struct aac_softc *)device_get_softc(device_get_parent(dev)); 342 sc->ad_container = device_get_ivars(dev); 343 sc->ad_dev = dev; 344 345 /* 346 * require that extended translation be enabled - other drivers read the 347 * disk! 348 */ 349 sc->ad_size = sc->ad_container->co_mntobj.Capacity; 350 if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ 351 sc->ad_heads = 255; 352 sc->ad_sectors = 63; 353 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 354 sc->ad_heads = 128; 355 sc->ad_sectors = 32; 356 } else { 357 sc->ad_heads = 64; 358 sc->ad_sectors = 32; 359 } 360 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 361 362 device_printf(dev, "%uMB (%u sectors)\n", 363 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 364 sc->ad_size); 365 366 devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev), 367 AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS, 368 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 369 DEVSTAT_PRIORITY_ARRAY); 370 371 /* attach a generic disk device to ourselves */ 372 sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, 373 &aac_disk_ops); 374 sc->ad_dev_t->si_drv1 = sc; 375 376 sc->ad_dev_t->si_iosize_max = aac_iosize_max; 377 sc->unit = device_get_unit(dev); 378 379 return (0); 380 } 381 382 /* 383 * Disconnect ourselves from the system. 384 */ 385 static int 386 aac_disk_detach(device_t dev) 387 { 388 struct aac_disk *sc; 389 390 debug_called(2); 391 392 sc = (struct aac_disk *)device_get_softc(dev); 393 394 if (sc->ad_flags & AAC_DISK_OPEN) 395 return(EBUSY); 396 397 devstat_remove_entry(&sc->ad_stats); 398 disk_destroy(&sc->ad_disk); 399 return(0); 400 } 401