amr_disk.c revision 65245
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 65245 2000-08-30 07:52:50Z msmith $ 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 <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#include <dev/amr/amr_tables.h> 53 54/* prototypes */ 55static int amrd_probe(device_t dev); 56static int amrd_attach(device_t dev); 57static int amrd_detach(device_t dev); 58 59static d_open_t amrd_open; 60static d_close_t amrd_close; 61static d_strategy_t amrd_strategy; 62static d_ioctl_t amrd_ioctl; 63 64#define AMRD_CDEV_MAJOR 133 65 66static struct cdevsw amrd_cdevsw = { 67 /* open */ amrd_open, 68 /* close */ amrd_close, 69 /* read */ physread, 70 /* write */ physwrite, 71 /* ioctl */ amrd_ioctl, 72 /* poll */ nopoll, 73 /* mmap */ nommap, 74 /* strategy */ amrd_strategy, 75 /* name */ "amrd", 76 /* maj */ AMRD_CDEV_MAJOR, 77 /* dump */ nodump, 78 /* psize */ nopsize, 79 /* flags */ D_DISK, 80 /* bmaj */ 254 81}; 82 83static devclass_t amrd_devclass; 84static struct cdevsw amrddisk_cdevsw; 85#ifdef FREEBSD_4 86static int disks_registered = 0; 87#endif 88 89static device_method_t amrd_methods[] = { 90 DEVMETHOD(device_probe, amrd_probe), 91 DEVMETHOD(device_attach, amrd_attach), 92 DEVMETHOD(device_detach, amrd_detach), 93 { 0, 0 } 94}; 95 96static driver_t amrd_driver = { 97 "amrd", 98 amrd_methods, 99 sizeof(struct amrd_softc) 100}; 101 102DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0); 103 104static int 105amrd_open(dev_t dev, int flags, int fmt, struct proc *p) 106{ 107 struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1; 108 struct disklabel *label; 109 110 debug_called(1); 111 112 if (sc == NULL) 113 return (ENXIO); 114 115 /* controller not active? */ 116 if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN) 117 return(ENXIO); 118 119 label = &sc->amrd_disk.d_label; 120 bzero(label, sizeof(*label)); 121 label->d_type = DTYPE_SCSI; 122 label->d_secsize = AMR_BLKSIZE; 123 label->d_nsectors = sc->amrd_drive->al_sectors; 124 label->d_ntracks = sc->amrd_drive->al_heads; 125 label->d_ncylinders = sc->amrd_drive->al_cylinders; 126 label->d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads; 127 label->d_secperunit = sc->amrd_drive->al_size; 128 129 sc->amrd_flags |= AMRD_OPEN; 130 return (0); 131} 132 133static int 134amrd_close(dev_t dev, int flags, int fmt, struct proc *p) 135{ 136 struct amrd_softc *sc = (struct amrd_softc *)dev->si_drv1; 137 138 debug_called(1); 139 140 if (sc == NULL) 141 return (ENXIO); 142 sc->amrd_flags &= ~AMRD_OPEN; 143 return (0); 144} 145 146static int 147amrd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 148{ 149 150 return (ENOTTY); 151} 152 153/* 154 * Read/write routine for a buffer. Finds the proper unit, range checks 155 * arguments, and schedules the transfer. Does not wait for the transfer 156 * to complete. Multi-page transfers are supported. All I/O requests must 157 * be a multiple of a sector in length. 158 */ 159static void 160amrd_strategy(struct bio *bio) 161{ 162 struct amrd_softc *sc = (struct amrd_softc *)bio->bio_dev->si_drv1; 163 164 /* bogus disk? */ 165 if (sc == NULL) { 166 bio->bio_error = EINVAL; 167 goto bad; 168 } 169 170 /* do-nothing operation */ 171 if (bio->bio_bcount == 0) 172 goto done; 173 174 devstat_start_transaction(&sc->amrd_stats); 175 amr_submit_bio(sc->amrd_controller, bio); 176 return; 177 178 bad: 179 bio->bio_flags |= BIO_ERROR; 180 181 done: 182 /* 183 * Correctly set the buf to indicate a completed transfer 184 */ 185 bio->bio_resid = bio->bio_bcount; 186 biodone(bio); 187 return; 188} 189 190void 191amrd_intr(void *data) 192{ 193 struct bio *bio = (struct bio *)data; 194 struct amrd_softc *sc = (struct amrd_softc *)bio->bio_dev->si_drv1; 195 196 debug_called(2); 197 198 if (bio->bio_flags & BIO_ERROR) { 199 bio->bio_error = EIO; 200 debug(1, "i/o error\n"); 201 } else { 202 bio->bio_resid = 0; 203 } 204 205 devstat_end_transaction_bio(&sc->amrd_stats, bio); 206 biodone(bio); 207} 208 209static int 210amrd_probe(device_t dev) 211{ 212 213 debug_called(1); 214 215 device_set_desc(dev, "MegaRAID logical drive"); 216 return (0); 217} 218 219static int 220amrd_attach(device_t dev) 221{ 222 struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev); 223 device_t parent; 224 225 debug_called(1); 226 227 parent = device_get_parent(dev); 228 sc->amrd_controller = (struct amr_softc *)device_get_softc(parent); 229 sc->amrd_unit = device_get_unit(dev); 230 sc->amrd_drive = device_get_ivars(dev); 231 sc->amrd_dev = dev; 232 233 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 234 sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE), 235 sc->amrd_drive->al_size, sc->amrd_drive->al_properties & AMR_DRV_RAID_MASK, 236 amr_describe_code(amr_table_drvstate, AMR_DRV_CURSTATE(sc->amrd_drive->al_state))); 237 238 devstat_add_entry(&sc->amrd_stats, "amrd", sc->amrd_unit, AMR_BLKSIZE, 239 DEVSTAT_NO_ORDERED_TAGS, 240 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 241 DEVSTAT_PRIORITY_ARRAY); 242 243 sc->amrd_dev_t = disk_create(sc->amrd_unit, &sc->amrd_disk, 0, &amrd_cdevsw, &amrddisk_cdevsw); 244 sc->amrd_dev_t->si_drv1 = sc; 245#ifdef FREEBSD_4 246 disks_registered++; 247#endif 248 249 /* set maximum I/O size to match the maximum s/g size */ 250 sc->amrd_dev_t->si_iosize_max = (AMR_NSEG - 1) * PAGE_SIZE; 251 252 return (0); 253} 254 255static int 256amrd_detach(device_t dev) 257{ 258 struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev); 259 260 debug_called(1); 261 262 if (sc->amrd_flags & AMRD_OPEN) 263 return(EBUSY); 264 265 devstat_remove_entry(&sc->amrd_stats); 266#ifdef FREEBSD_4 267 if (--disks_registered == 0) 268 cdevsw_remove(&amrddisk_cdevsw); 269#else 270 disk_destroy(sc->amrd_dev_t); 271#endif 272 return(0); 273} 274 275