amr_disk.c revision 59249
1/*- 2 * Copyright (c) 1999 Jonathan Lemon 3 * Copyright (c) 1999 Michael Smith 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: head/sys/dev/amr/amr_disk.c 59249 2000-04-15 05:54:02Z phk $ 28 */ 29 30/* 31 * Disk driver for AMI MegaRaid controllers 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/malloc.h> 37#include <sys/kernel.h> 38 39#include <sys/buf.h> 40#include <sys/bus.h> 41#include <sys/conf.h> 42#include <sys/devicestat.h> 43#include <sys/disk.h> 44 45#include <machine/bus.h> 46#include <machine/clock.h> 47#include <sys/rman.h> 48 49#include <dev/amr/amrio.h> 50#include <dev/amr/amrreg.h> 51#include <dev/amr/amrvar.h> 52 53#if 0 54#define debug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args) 55#else 56#define debug(fmt, args...) 57#endif 58 59/* prototypes */ 60static int amrd_probe(device_t dev); 61static int amrd_attach(device_t dev); 62static int amrd_detach(device_t dev); 63 64static d_open_t amrd_open; 65static d_close_t amrd_close; 66static d_strategy_t amrd_strategy; 67static d_ioctl_t amrd_ioctl; 68 69#define AMRD_BDEV_MAJOR 35 70#define AMRD_CDEV_MAJOR 133 71 72static struct cdevsw amrd_cdevsw = { 73 /* open */ amrd_open, 74 /* close */ amrd_close, 75 /* read */ physread, 76 /* write */ physwrite, 77 /* ioctl */ amrd_ioctl, 78 /* poll */ nopoll, 79 /* mmap */ nommap, 80 /* strategy */ amrd_strategy, 81 /* name */ "amrd", 82 /* maj */ AMRD_CDEV_MAJOR, 83 /* dump */ nodump, 84 /* psize */ nopsize, 85 /* flags */ D_DISK, 86 /* bmaj */ AMRD_BDEV_MAJOR 87}; 88 89static devclass_t amrd_devclass; 90static struct cdevsw amrddisk_cdevsw; 91static int disks_registered = 0; 92 93static device_method_t amrd_methods[] = { 94 DEVMETHOD(device_probe, amrd_probe), 95 DEVMETHOD(device_attach, amrd_attach), 96 DEVMETHOD(device_detach, amrd_detach), 97 { 0, 0 } 98}; 99 100static driver_t amrd_driver = { 101 "amrd", 102 amrd_methods, 103 sizeof(struct amrd_softc) 104}; 105 106DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0); 107 108static int 109amrd_open(dev_t dev, int flags, int fmt, struct proc *p) 110{ 111 struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1; 112 struct disklabel *label; 113 114 debug("called"); 115 116 if (sc == NULL) 117 return (ENXIO); 118 119 /* controller not active? */ 120 if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN) 121 return(ENXIO); 122 123 label = &sc->amrd_disk.d_label; 124 bzero(label, sizeof(*label)); 125 label->d_type = DTYPE_SCSI; 126 label->d_secsize = AMR_BLKSIZE; 127 label->d_nsectors = sc->amrd_drive->al_sectors; 128 label->d_ntracks = sc->amrd_drive->al_heads; 129 label->d_ncylinders = sc->amrd_drive->al_cylinders; 130 label->d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads; 131 label->d_secperunit = sc->amrd_drive->al_size; 132 133 sc->amrd_flags |= AMRD_OPEN; 134 return (0); 135} 136 137static int 138amrd_close(dev_t dev, int flags, int fmt, struct proc *p) 139{ 140 struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1; 141 142 debug("called"); 143 144 if (sc == NULL) 145 return (ENXIO); 146 sc->amrd_flags &= ~AMRD_OPEN; 147 return (0); 148} 149 150static int 151amrd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 152{ 153 struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1; 154 int error; 155 156 debug("called"); 157 158 if (sc == NULL) 159 return (ENXIO); 160 161 if ((error = amr_submit_ioctl(sc->amrd_controller, sc->amrd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 162 debug("amr_submit_ioctl returned %d\n", error); 163 return(error); 164 } 165 return (ENOTTY); 166} 167 168/* 169 * Read/write routine for a buffer. Finds the proper unit, range checks 170 * arguments, and schedules the transfer. Does not wait for the transfer 171 * to complete. Multi-page transfers are supported. All I/O requests must 172 * be a multiple of a sector in length. 173 */ 174static void 175amrd_strategy(struct bio *bp) 176{ 177 struct amrd_softc *sc = (struct amrd_softc *)bp->bio_dev->si_drv1; 178 179 debug("called to %s %d bytes at b_blkno 0x%x b_pblkno 0x%x", 180 (bp->b_flags & B_READ) ? "read" : "write", bp->bio_bcount, bp->bio_blkno, bp->bio_pblkno); 181 182 /* bogus disk? */ 183 if (sc == NULL) { 184 bp->bio_error = EINVAL; 185 goto bad; 186 } 187 188#if 0 189 /* XXX may only be temporarily offline - sleep? */ 190 if (sc->amrd_drive->ld_state == AMR_SYSD_OFFLINE) { 191 bp->bio_error = ENXIO; 192 goto bad; 193 } 194#endif 195 196 /* do-nothing operation */ 197 if (bp->bio_bcount == 0) 198 goto done; 199 200 devstat_start_transaction(&sc->amrd_stats); 201 amr_submit_buf(sc->amrd_controller, bp); 202 return; 203 204 bad: 205 bp->bio_flags |= BIO_ERROR; 206 207 done: 208 /* 209 * Correctly set the buf to indicate a completed transfer 210 */ 211 bp->bio_resid = bp->bio_bcount; 212 biodone(bp); 213 return; 214} 215 216void 217amrd_intr(void *data) 218{ 219 struct bio *bp = (struct bio *)data; 220 struct amrd_softc *sc = (struct amrd_softc *)bp->bio_dev->si_drv1; 221 222 debug("called"); 223 224 if (bp->bio_flags & BIO_ERROR) { 225 bp->bio_error = EIO; 226 debug("i/o error\n"); 227 } else { 228#if 0 229 int i; 230 for (i = 0; i < 512; i += 16) 231 debug(" %04x %16D", i, bp->bio_data + i, " "); 232#endif 233 bp->bio_resid = 0; 234 } 235 236 devstat_end_transaction_bio(&sc->amrd_stats, bp); 237 biodone(bp); 238} 239 240static int 241amrd_probe(device_t dev) 242{ 243 244 debug("called"); 245 246 device_set_desc(dev, "MegaRAID logical drive"); 247 return (0); 248} 249 250static int 251amrd_attach(device_t dev) 252{ 253 struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev); 254 device_t parent; 255 char *state; 256 257 debug("called"); 258 259 parent = device_get_parent(dev); 260 sc->amrd_controller = (struct amr_softc *)device_get_softc(parent); 261 sc->amrd_unit = device_get_unit(dev); 262 sc->amrd_drive = device_get_ivars(dev); 263 sc->amrd_dev = dev; 264 265 switch(sc->amrd_drive->al_state) { 266 case AMRD_OFFLINE: 267 state = "offline"; 268 break; 269 case AMRD_DEGRADED: 270 state = "degraded"; 271 break; 272 case AMRD_OPTIMAL: 273 state = "optimal"; 274 break; 275 case AMRD_DELETED: 276 state = "deleted"; 277 break; 278 default: 279 state = "unknown state"; 280 } 281 282 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 283 sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE), 284 sc->amrd_drive->al_size, sc->amrd_drive->al_properties & 0xf, state); 285 286 devstat_add_entry(&sc->amrd_stats, "amrd", sc->amrd_unit, AMR_BLKSIZE, 287 DEVSTAT_NO_ORDERED_TAGS, 288 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 289 DEVSTAT_PRIORITY_ARRAY); 290 291 sc->amrd_dev_t = disk_create(sc->amrd_unit, &sc->amrd_disk, 0, &amrd_cdevsw, &amrddisk_cdevsw); 292 sc->amrd_dev_t->si_drv1 = sc; 293 disks_registered++; 294 295 /* set maximum I/O size */ 296 /* dsk->si_iosize_max = ??? */; 297 298 return (0); 299} 300 301static int 302amrd_detach(device_t dev) 303{ 304 struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev); 305 306 debug("called"); 307 308 devstat_remove_entry(&sc->amrd_stats); 309 disk_destroy(sc->amrd_dev_t); 310 return(0); 311} 312 313