mlx_disk.c revision 67164
1117397Skan/*- 2117397Skan * Copyright (c) 1999 Jonathan Lemon 3117397Skan * Copyright (c) 1999 Michael Smith 4117397Skan * All rights reserved. 5117397Skan * 6117397Skan * Redistribution and use in source and binary forms, with or without 7117397Skan * modification, are permitted provided that the following conditions 8117397Skan * are met: 9117397Skan * 1. Redistributions of source code must retain the above copyright 10117397Skan * notice, this list of conditions and the following disclaimer. 11117397Skan * 2. Redistributions in binary form must reproduce the above copyright 12117397Skan * notice, this list of conditions and the following disclaimer in the 13117397Skan * documentation and/or other materials provided with the distribution. 14117397Skan * 15117397Skan * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16117397Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17117397Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18169691Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19117397Skan * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20117397Skan * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21117397Skan * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22117397Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23117397Skan * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24117397Skan * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25117397Skan * SUCH DAMAGE. 26117397Skan * 27117397Skan * $FreeBSD: head/sys/dev/mlx/mlx_disk.c 67164 2000-10-15 14:19:01Z phk $ 28117397Skan */ 29117397Skan 30169691Skan/* 31169691Skan * Disk driver for Mylex DAC960 RAID adapters. 32169691Skan */ 33169691Skan 34169691Skan#include <sys/param.h> 35117397Skan#include <sys/systm.h> 36117397Skan#include <sys/kernel.h> 37117397Skan 38117397Skan#include <sys/bio.h> 39117397Skan#include <sys/bus.h> 40117397Skan#include <sys/conf.h> 41117397Skan#include <sys/devicestat.h> 42117397Skan#include <sys/disk.h> 43117397Skan 44117397Skan#include <machine/bus.h> 45117397Skan#include <sys/rman.h> 46117397Skan 47117397Skan#include <dev/mlx/mlxio.h> 48117397Skan#include <dev/mlx/mlxvar.h> 49169691Skan#include <dev/mlx/mlxreg.h> 50169691Skan 51117397Skan/* prototypes */ 52117397Skanstatic int mlxd_probe(device_t dev); 53117397Skanstatic int mlxd_attach(device_t dev); 54117397Skanstatic int mlxd_detach(device_t dev); 55117397Skan 56117397Skanstatic d_open_t mlxd_open; 57117397Skanstatic d_close_t mlxd_close; 58117397Skanstatic d_strategy_t mlxd_strategy; 59132720Skanstatic d_ioctl_t mlxd_ioctl; 60132720Skan 61122182Skan#define MLXD_BDEV_MAJOR 27 62132720Skan#define MLXD_CDEV_MAJOR 131 63117397Skan 64132720Skanstatic struct cdevsw mlxd_cdevsw = { 65117397Skan /* open */ mlxd_open, 66117397Skan /* close */ mlxd_close, 67117397Skan /* read */ physread, 68117397Skan /* write */ physwrite, 69117397Skan /* ioctl */ mlxd_ioctl, 70117397Skan /* poll */ nopoll, 71117397Skan /* mmap */ nommap, 72117397Skan /* strategy */ mlxd_strategy, 73117397Skan /* name */ "mlxd", 74117397Skan /* maj */ MLXD_CDEV_MAJOR, 75117397Skan /* dump */ nodump, 76117397Skan /* psize */ nopsize, 77117397Skan /* flags */ D_DISK, 78117397Skan /* bmaj */ MLXD_BDEV_MAJOR 79117397Skan}; 80117397Skan 81117397Skandevclass_t mlxd_devclass; 82117397Skanstatic struct cdevsw mlxddisk_cdevsw; 83117397Skan 84117397Skanstatic device_method_t mlxd_methods[] = { 85117397Skan DEVMETHOD(device_probe, mlxd_probe), 86117397Skan DEVMETHOD(device_attach, mlxd_attach), 87117397Skan DEVMETHOD(device_detach, mlxd_detach), 88117397Skan { 0, 0 } 89117397Skan}; 90117397Skan 91117397Skanstatic driver_t mlxd_driver = { 92117397Skan "mlxd", 93117397Skan mlxd_methods, 94117397Skan sizeof(struct mlxd_softc) 95117397Skan}; 96117397Skan 97117397SkanDRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 98117397Skan 99117397Skanstatic int 100117397Skanmlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 101117397Skan{ 102117397Skan struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 103117397Skan struct disklabel *label; 104117397Skan 105117397Skan debug_called(1); 106117397Skan 107132720Skan if (sc == NULL) 108117397Skan return (ENXIO); 109117397Skan 110132720Skan /* controller not active? */ 111117397Skan if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 112117397Skan return(ENXIO); 113117397Skan 114117397Skan label = &sc->mlxd_disk.d_label; 115117397Skan bzero(label, sizeof(*label)); 116117397Skan label->d_type = DTYPE_SCSI; 117117397Skan label->d_secsize = MLX_BLKSIZE; 118117397Skan label->d_nsectors = sc->mlxd_drive->ms_sectors; 119117397Skan label->d_ntracks = sc->mlxd_drive->ms_heads; 120117397Skan label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 121117397Skan label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 122117397Skan label->d_secperunit = sc->mlxd_drive->ms_size; 123117397Skan 124132720Skan sc->mlxd_flags |= MLXD_OPEN; 125117397Skan return (0); 126117397Skan} 127117397Skan 128117397Skanstatic int 129122182Skanmlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 130122182Skan{ 131117397Skan struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 132132720Skan 133117397Skan debug_called(1); 134117397Skan 135117397Skan if (sc == NULL) 136117397Skan return (ENXIO); 137117397Skan sc->mlxd_flags &= ~MLXD_OPEN; 138117397Skan return (0); 139117397Skan} 140117397Skan 141117397Skanstatic int 142117397Skanmlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 143117397Skan{ 144117397Skan struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 145117397Skan int error; 146117397Skan 147117397Skan debug_called(1); 148117397Skan 149117397Skan if (sc == NULL) 150117397Skan return (ENXIO); 151117397Skan 152117397Skan if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 153117397Skan debug(0, "mlx_submit_ioctl returned %d\n", error); 154117397Skan return(error); 155117397Skan } 156117397Skan return (ENOTTY); 157117397Skan} 158117397Skan 159117397Skan/* 160117397Skan * Read/write routine for a buffer. Finds the proper unit, range checks 161117397Skan * arguments, and schedules the transfer. Does not wait for the transfer 162117397Skan * to complete. Multi-page transfers are supported. All I/O requests must 163117397Skan * be a multiple of a sector in length. 164117397Skan */ 165117397Skanstatic void 166117397Skanmlxd_strategy(struct bio *bp) 167117397Skan{ 168117397Skan struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 169169691Skan 170169691Skan debug_called(1); 171 172 /* bogus disk? */ 173 if (sc == NULL) { 174 bp->bio_error = EINVAL; 175 goto bad; 176 } 177 178 /* XXX may only be temporarily offline - sleep? */ 179 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 180 bp->bio_error = ENXIO; 181 goto bad; 182 } 183 184 /* do-nothing operation */ 185 if (bp->bio_bcount == 0) 186 goto done; 187 188 devstat_start_transaction(&sc->mlxd_stats); 189 mlx_submit_buf(sc->mlxd_controller, bp); 190 return; 191 192 bad: 193 bp->bio_flags |= BIO_ERROR; 194 195 done: 196 /* 197 * Correctly set the buf to indicate a completed transfer 198 */ 199 bp->bio_resid = bp->bio_bcount; 200 biodone(bp); 201 return; 202} 203 204void 205mlxd_intr(void *data) 206{ 207 struct bio *bp = (struct bio *)data; 208 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 209 210 debug_called(1); 211 212 if (bp->bio_flags & BIO_ERROR) 213 bp->bio_error = EIO; 214 else 215 bp->bio_resid = 0; 216 217 devstat_end_transaction_bio(&sc->mlxd_stats, bp); 218 biodone(bp); 219} 220 221static int 222mlxd_probe(device_t dev) 223{ 224 225 debug_called(1); 226 227 device_set_desc(dev, "Mylex System Drive"); 228 return (0); 229} 230 231static int 232mlxd_attach(device_t dev) 233{ 234 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 235 device_t parent; 236 char *state; 237 dev_t dsk; 238 int s1, s2; 239 240 debug_called(1); 241 242 parent = device_get_parent(dev); 243 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 244 sc->mlxd_unit = device_get_unit(dev); 245 sc->mlxd_drive = device_get_ivars(dev); 246 sc->mlxd_dev = dev; 247 248 switch(sc->mlxd_drive->ms_state) { 249 case MLX_SYSD_ONLINE: 250 state = "online"; 251 break; 252 case MLX_SYSD_CRITICAL: 253 state = "critical"; 254 break; 255 case MLX_SYSD_OFFLINE: 256 state = "offline"; 257 break; 258 default: 259 state = "unknown state"; 260 } 261 262 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 263 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 264 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 265 266 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 267 DEVSTAT_NO_ORDERED_TAGS, 268 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 269 DEVSTAT_PRIORITY_ARRAY); 270 271 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 272 dsk->si_drv1 = sc; 273 sc->mlxd_dev_t = dsk; 274 275 /* 276 * Set maximum I/O size to the lesser of the recommended maximum and the practical 277 * maximum. 278 */ 279 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 280 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 281 dsk->si_iosize_max = imin(s1, s2); 282 283 return (0); 284} 285 286static int 287mlxd_detach(device_t dev) 288{ 289 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 290 291 debug_called(1); 292 293 devstat_remove_entry(&sc->mlxd_stats); 294 disk_destroy(sc->mlxd_dev_t); 295 296 return(0); 297} 298 299