amr_disk.c revision 67164
1/*- 2 * Copyright (c) 1999 Jonathan Lemon 3 * Copyright (c) 1999, 2000 Michael Smith 4 * Copyright (c) 2000 BSDi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: head/sys/dev/amr/amr_disk.c 67164 2000-10-15 14:19:01Z phk $ 29 */ 30 31/* 32 * Disk driver for AMI MegaRaid controllers 33 */ 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38 39#include <dev/amr/amr_compat.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 <sys/rman.h> 47 48#include <dev/amr/amrio.h> 49#include <dev/amr/amrreg.h> 50#include <dev/amr/amrvar.h> 51#include <dev/amr/amr_tables.h> 52 53/* prototypes */ 54static int amrd_probe(device_t dev); 55static int amrd_attach(device_t dev); 56static int amrd_detach(device_t dev); 57 58static d_open_t amrd_open; 59static d_close_t amrd_close; 60static d_strategy_t amrd_strategy; 61static d_ioctl_t amrd_ioctl; 62 63#define AMRD_CDEV_MAJOR 133 64 65static struct cdevsw amrd_cdevsw = { 66 /* open */ amrd_open, 67 /* close */ amrd_close, 68 /* read */ physread, 69 /* write */ physwrite, 70 /* ioctl */ amrd_ioctl, 71 /* poll */ nopoll, 72 /* mmap */ nommap, 73 /* strategy */ amrd_strategy, 74 /* name */ "amrd", 75 /* maj */ AMRD_CDEV_MAJOR, 76 /* dump */ nodump, 77 /* psize */ nopsize, 78 /* flags */ D_DISK, 79 /* bmaj */ 254 80}; 81 82static devclass_t amrd_devclass; 83static struct cdevsw amrddisk_cdevsw; 84#ifdef FREEBSD_4 85static int disks_registered = 0; 86#endif 87 88static device_method_t amrd_methods[] = { 89 DEVMETHOD(device_probe, amrd_probe), 90 DEVMETHOD(device_attach, amrd_attach), 91 DEVMETHOD(device_detach, amrd_detach), 92 { 0, 0 } 93}; 94 95static driver_t amrd_driver = { 96 "amrd", 97 amrd_methods, 98 sizeof(struct amrd_softc) 99}; 100 101DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0); 102 103static int 104amrd_open(dev_t dev, int flags, int fmt, struct proc *p) 105{ 106 struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1; 107 struct disklabel *label; 108 109 debug_called(1); 110 111 if (sc == NULL) 112 return (ENXIO); 113 114 /* controller not active? */ 115 if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN) 116 return(ENXIO); 117 118 label = &sc->amrd_disk.d_label; 119 bzero(label, sizeof(*label)); 120 label->d_type = DTYPE_SCSI; 121 label->d_secsize = AMR_BLKSIZE; 122 label->d_nsectors = sc->amrd_drive->al_sectors; 123 label->d_ntracks = sc->amrd_drive->al_heads; 124 label->d_ncylinders = sc->amrd_drive->al_cylinders; 125 label->d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads; 126 label->d_secperunit = sc->amrd_drive->al_size; 127 128 sc->amrd_flags |= AMRD_OPEN; 129 return (0); 130} 131 132static int 133amrd_close(dev_t dev, int flags, int fmt, struct proc *p) 134{ 135 struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1; 136 137 debug_called(1); 138 139 if (sc == NULL) 140 return (ENXIO); 141 sc->amrd_flags &= ~AMRD_OPEN; 142 return (0); 143} 144 145static int 146amrd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 147{ 148 149 return (ENOTTY); 150} 151 152/* 153 * Read/write routine for a buffer. Finds the proper unit, range checks 154 * arguments, and schedules the transfer. Does not wait for the transfer 155 * to complete. Multi-page transfers are supported. All I/O requests must 156 * be a multiple of a sector in length. 157 */ 158static void 159amrd_strategy(struct bio *bio) 160{ 161 struct amrd_softc *sc = (struct amrd_softc *)bio->bio_dev->si_drv1; 162 163 /* bogus disk? */ 164 if (sc == NULL) { 165 bio->bio_error = EINVAL; 166 goto bad; 167 } 168 169 /* do-nothing operation */ 170 if (bio->bio_bcount == 0) 171 goto done; 172 173 devstat_start_transaction(&sc->amrd_stats); 174 amr_submit_bio(sc->amrd_controller, bio); 175 return; 176 177 bad: 178 bio->bio_flags |= BIO_ERROR; 179 180 done: 181 /* 182 * Correctly set the buf to indicate a completed transfer 183 */ 184 bio->bio_resid = bio->bio_bcount; 185 biodone(bio); 186 return; 187} 188 189void 190amrd_intr(void *data) 191{ 192 struct bio *bio = (struct bio *)data; 193 struct amrd_softc *sc = (struct amrd_softc *)bio->bio_dev->si_drv1; 194 195 debug_called(2); 196 197 if (bio->bio_flags & BIO_ERROR) { 198 bio->bio_error = EIO; 199 debug(1, "i/o error\n"); 200 } else { 201 bio->bio_resid = 0; 202 } 203 204 devstat_end_transaction_bio(&sc->amrd_stats, bio); 205 biodone(bio); 206} 207 208static int 209amrd_probe(device_t dev) 210{ 211 212 debug_called(1); 213 214 device_set_desc(dev, "MegaRAID logical drive"); 215 return (0); 216} 217 218static int 219amrd_attach(device_t dev) 220{ 221 struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev); 222 device_t parent; 223 224 debug_called(1); 225 226 parent = device_get_parent(dev); 227 sc->amrd_controller = (struct amr_softc *)device_get_softc(parent); 228 sc->amrd_unit = device_get_unit(dev); 229 sc->amrd_drive = device_get_ivars(dev); 230 sc->amrd_dev = dev; 231 232 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 233 sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE), 234 sc->amrd_drive->al_size, sc->amrd_drive->al_properties & AMR_DRV_RAID_MASK, 235 amr_describe_code(amr_table_drvstate, AMR_DRV_CURSTATE(sc->amrd_drive->al_state))); 236 237 devstat_add_entry(&sc->amrd_stats, "amrd", sc->amrd_unit, AMR_BLKSIZE, 238 DEVSTAT_NO_ORDERED_TAGS, 239 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 240 DEVSTAT_PRIORITY_ARRAY); 241 242 sc->amrd_dev_t = disk_create(sc->amrd_unit, &sc->amrd_disk, 0, &amrd_cdevsw, &amrddisk_cdevsw); 243 sc->amrd_dev_t->si_drv1 = sc; 244#ifdef FREEBSD_4 245 disks_registered++; 246#endif 247 248 /* set maximum I/O size to match the maximum s/g size */ 249 sc->amrd_dev_t->si_iosize_max = (AMR_NSEG - 1) * PAGE_SIZE; 250 251 return (0); 252} 253 254static int 255amrd_detach(device_t dev) 256{ 257 struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev); 258 259 debug_called(1); 260 261 if (sc->amrd_flags & AMRD_OPEN) 262 return(EBUSY); 263 264 devstat_remove_entry(&sc->amrd_stats); 265#ifdef FREEBSD_4 266 if (--disks_registered == 0) 267 cdevsw_remove(&amrddisk_cdevsw); 268#else 269 disk_destroy(sc->amrd_dev_t); 270#endif 271 return(0); 272} 273 274