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 1.13 2006/07/28 02:17:37 dillon 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/sysctl.h> 39 40 #include "aac_compat.h" 41 #include <sys/bus.h> 42 #include <sys/conf.h> 43 #include <sys/devicestat.h> 44 #include <sys/disk.h> 45 46 #include <vm/vm.h> 47 #include <vm/pmap.h> 48 49 #include <machine/md_var.h> 50 #include <machine/bus.h> 51 #include <sys/rman.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 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 dev_t dev = ap->a_head.a_dev; 121 struct aac_disk *sc; 122 struct disklabel *label; 123 124 debug_called(0); 125 126 sc = (struct aac_disk *)dev->si_drv1; 127 128 if (sc == NULL) { 129 printf("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 printf("Controller Suspended controller state = 0x%x\n", 136 sc->ad_controller->aac_state); 137 return(ENXIO); 138 } 139 140 /* build synthetic label */ 141 label = &sc->ad_disk.d_label; 142 bzero(label, sizeof(*label)); 143 label->d_type = DTYPE_ESDI; 144 label->d_secsize = AAC_BLOCK_SIZE; 145 label->d_nsectors = sc->ad_sectors; 146 label->d_ntracks = sc->ad_heads; 147 label->d_ncylinders = sc->ad_cylinders; 148 label->d_secpercyl = sc->ad_sectors * sc->ad_heads; 149 label->d_secperunit = sc->ad_size; 150 151 sc->ad_flags |= AAC_DISK_OPEN; 152 return (0); 153 } 154 155 /* 156 * Handle last close of the disk device. 157 */ 158 static int 159 aac_disk_close(struct dev_close_args *ap) 160 { 161 dev_t dev = ap->a_head.a_dev; 162 struct aac_disk *sc; 163 164 debug_called(0); 165 166 sc = (struct aac_disk *)dev->si_drv1; 167 168 if (sc == NULL) 169 return (ENXIO); 170 171 sc->ad_flags &= ~AAC_DISK_OPEN; 172 return (0); 173 } 174 175 /* 176 * Handle an I/O request. 177 */ 178 static int 179 aac_disk_strategy(struct dev_strategy_args *ap) 180 { 181 dev_t dev = ap->a_head.a_dev; 182 struct bio *bio = ap->a_bio; 183 struct buf *bp = bio->bio_buf; 184 struct aac_disk *sc; 185 186 debug_called(4); 187 188 sc = (struct aac_disk *)dev->si_drv1; 189 190 /* bogus disk? */ 191 if (sc == NULL) { 192 bp->b_flags |= B_ERROR; 193 bp->b_error = EINVAL; 194 biodone(bio); 195 return(0); 196 } 197 198 /* do-nothing operation? */ 199 if (bp->b_bcount == 0) { 200 bp->b_resid = bp->b_bcount; 201 biodone(bio); 202 return(0); 203 } 204 205 /* perform accounting */ 206 devstat_start_transaction(&sc->ad_stats); 207 208 /* pass the bio to the controller - it can work out who we are */ 209 aac_submit_bio(sc, bio); 210 return(0); 211 } 212 213 /* 214 * Dump memory out to an array 215 * 216 * This queues blocks of memory of size AAC_MAXIO to the controller and waits 217 * for the controller to complete the requests. 218 */ 219 static int 220 aac_disk_dump(struct dev_dump_args *ap) 221 { 222 dev_t dev = ap->a_head.a_dev; 223 struct aac_disk *ad; 224 struct aac_softc *sc; 225 vm_offset_t addr; 226 long blkcnt; 227 int dumppages; 228 int i, error; 229 230 ad = dev->si_drv1; 231 addr = 0; 232 dumppages = AAC_MAXIO / PAGE_SIZE; 233 234 if (ad == NULL) 235 return (ENXIO); 236 237 sc= ad->ad_controller; 238 239 blkcnt = howmany(PAGE_SIZE, ap->a_secsize); 240 241 while (ap->a_count > 0) { 242 caddr_t va = NULL; 243 244 if ((ap->a_count / blkcnt) < dumppages) 245 dumppages = ap->a_count / blkcnt; 246 247 for (i = 0; i < dumppages; ++i) { 248 vm_offset_t a = addr + (i * PAGE_SIZE); 249 if (is_physical_memory(a)) { 250 va = pmap_kenter_temporary(trunc_page(a), i); 251 } else { 252 va = pmap_kenter_temporary(trunc_page(0), i); 253 } 254 } 255 256 retry: 257 /* 258 * Queue the block to the controller. If the queue is full, 259 * EBUSY will be returned. 260 */ 261 error = aac_dump_enqueue(ad, ap->a_blkno, va, dumppages); 262 if (error && (error != EBUSY)) 263 return (error); 264 265 if (!error) { 266 if (dumpstatus(addr, (off_t)(ap->a_count * DEV_BSIZE)) < 0) 267 return (EINTR); 268 269 ap->a_blkno += blkcnt * dumppages; 270 ap->a_count -= blkcnt * dumppages; 271 addr += PAGE_SIZE * dumppages; 272 if (ap->a_count > 0) 273 continue; 274 } 275 276 /* 277 * Either the queue was full on the last attemp, or we have no 278 * more data to dump. Let the queue drain out and retry the 279 * block if the queue was full. 280 */ 281 aac_dump_complete(sc); 282 283 if (error == EBUSY) 284 goto retry; 285 } 286 287 return (0); 288 } 289 290 /* 291 * Handle completion of an I/O request. 292 */ 293 void 294 aac_biodone(struct bio *bio, const char *code) 295 { 296 struct buf *bp = bio->bio_buf; 297 struct aac_disk *sc; 298 299 debug_called(4); 300 301 sc = (struct aac_disk *)bio->bio_driver_info; 302 303 devstat_end_transaction_buf(&sc->ad_stats, bp); 304 if (bp->b_flags & B_ERROR) { 305 diskerr(bio, sc->ad_dev_t, 306 code, 0, 0, &sc->ad_label); 307 } 308 biodone(bio); 309 } 310 311 /* 312 * Stub only. 313 */ 314 static int 315 aac_disk_probe(device_t dev) 316 { 317 318 debug_called(2); 319 320 return (0); 321 } 322 323 /* 324 * Attach a unit to the controller. 325 */ 326 static int 327 aac_disk_attach(device_t dev) 328 { 329 struct aac_disk *sc; 330 331 debug_called(0); 332 333 sc = (struct aac_disk *)device_get_softc(dev); 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_size >= (2 * 1024 * 1024)) { /* 2GB */ 347 sc->ad_heads = 255; 348 sc->ad_sectors = 63; 349 } else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */ 350 sc->ad_heads = 128; 351 sc->ad_sectors = 32; 352 } else { 353 sc->ad_heads = 64; 354 sc->ad_sectors = 32; 355 } 356 sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); 357 358 device_printf(dev, "%uMB (%u sectors)\n", 359 sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), 360 sc->ad_size); 361 362 devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev), 363 AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS, 364 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 365 DEVSTAT_PRIORITY_ARRAY); 366 367 /* attach a generic disk device to ourselves */ 368 sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, 0, 369 &aac_disk_ops); 370 sc->ad_dev_t->si_drv1 = sc; 371 372 sc->ad_dev_t->si_iosize_max = aac_iosize_max; 373 sc->unit = device_get_unit(dev); 374 375 return (0); 376 } 377 378 /* 379 * Disconnect ourselves from the system. 380 */ 381 static int 382 aac_disk_detach(device_t dev) 383 { 384 struct aac_disk *sc; 385 386 debug_called(2); 387 388 sc = (struct aac_disk *)device_get_softc(dev); 389 390 if (sc->ad_flags & AAC_DISK_OPEN) 391 return(EBUSY); 392 393 devstat_remove_entry(&sc->ad_stats); 394 disk_destroy(&sc->ad_disk); 395 return(0); 396 } 397