mlx_disk.c revision 76322
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/mlx/mlx_disk.c 76322 2001-05-06 20:00:03Z phk $ 28 */ 29 30/* 31 * Disk driver for Mylex DAC960 RAID adapters. 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/kernel.h> 37 38#include <sys/bio.h> 39#include <sys/bus.h> 40#include <sys/conf.h> 41#include <sys/devicestat.h> 42#include <sys/disk.h> 43 44#include <machine/bus.h> 45#include <sys/rman.h> 46 47#include <dev/mlx/mlxio.h> 48#include <dev/mlx/mlxvar.h> 49#include <dev/mlx/mlxreg.h> 50 51/* prototypes */ 52static int mlxd_probe(device_t dev); 53static int mlxd_attach(device_t dev); 54static int mlxd_detach(device_t dev); 55 56static d_open_t mlxd_open; 57static d_close_t mlxd_close; 58static d_strategy_t mlxd_strategy; 59static d_ioctl_t mlxd_ioctl; 60 61#define MLXD_CDEV_MAJOR 131 62 63static struct cdevsw mlxd_cdevsw = { 64 /* open */ mlxd_open, 65 /* close */ mlxd_close, 66 /* read */ physread, 67 /* write */ physwrite, 68 /* ioctl */ mlxd_ioctl, 69 /* poll */ nopoll, 70 /* mmap */ nommap, 71 /* strategy */ mlxd_strategy, 72 /* name */ "mlxd", 73 /* maj */ MLXD_CDEV_MAJOR, 74 /* dump */ nodump, 75 /* psize */ nopsize, 76 /* flags */ D_DISK, 77}; 78 79devclass_t mlxd_devclass; 80static struct cdevsw mlxddisk_cdevsw; 81 82static device_method_t mlxd_methods[] = { 83 DEVMETHOD(device_probe, mlxd_probe), 84 DEVMETHOD(device_attach, mlxd_attach), 85 DEVMETHOD(device_detach, mlxd_detach), 86 { 0, 0 } 87}; 88 89static driver_t mlxd_driver = { 90 "mlxd", 91 mlxd_methods, 92 sizeof(struct mlxd_softc) 93}; 94 95DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 96 97static int 98mlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 99{ 100 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 101 struct disklabel *label; 102 103 debug_called(1); 104 105 if (sc == NULL) 106 return (ENXIO); 107 108 /* controller not active? */ 109 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 110 return(ENXIO); 111 112 label = &sc->mlxd_disk.d_label; 113 bzero(label, sizeof(*label)); 114 label->d_type = DTYPE_SCSI; 115 label->d_secsize = MLX_BLKSIZE; 116 label->d_nsectors = sc->mlxd_drive->ms_sectors; 117 label->d_ntracks = sc->mlxd_drive->ms_heads; 118 label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 119 label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 120 label->d_secperunit = sc->mlxd_drive->ms_size; 121 122 sc->mlxd_flags |= MLXD_OPEN; 123 return (0); 124} 125 126static int 127mlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 128{ 129 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 130 131 debug_called(1); 132 133 if (sc == NULL) 134 return (ENXIO); 135 sc->mlxd_flags &= ~MLXD_OPEN; 136 return (0); 137} 138 139static int 140mlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 141{ 142 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 143 int error; 144 145 debug_called(1); 146 147 if (sc == NULL) 148 return (ENXIO); 149 150 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 151 debug(0, "mlx_submit_ioctl returned %d\n", error); 152 return(error); 153 } 154 return (ENOTTY); 155} 156 157/* 158 * Read/write routine for a buffer. Finds the proper unit, range checks 159 * arguments, and schedules the transfer. Does not wait for the transfer 160 * to complete. Multi-page transfers are supported. All I/O requests must 161 * be a multiple of a sector in length. 162 */ 163static void 164mlxd_strategy(struct bio *bp) 165{ 166 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 167 168 debug_called(1); 169 170 /* bogus disk? */ 171 if (sc == NULL) { 172 bp->bio_error = EINVAL; 173 goto bad; 174 } 175 176 /* XXX may only be temporarily offline - sleep? */ 177 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 178 bp->bio_error = ENXIO; 179 goto bad; 180 } 181 182 /* do-nothing operation */ 183 if (bp->bio_bcount == 0) 184 goto done; 185 186 devstat_start_transaction(&sc->mlxd_stats); 187 mlx_submit_buf(sc->mlxd_controller, bp); 188 return; 189 190 bad: 191 bp->bio_flags |= BIO_ERROR; 192 193 done: 194 /* 195 * Correctly set the buf to indicate a completed transfer 196 */ 197 bp->bio_resid = bp->bio_bcount; 198 biodone(bp); 199 return; 200} 201 202void 203mlxd_intr(void *data) 204{ 205 struct bio *bp = (struct bio *)data; 206 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 207 208 debug_called(1); 209 210 if (bp->bio_flags & BIO_ERROR) 211 bp->bio_error = EIO; 212 else 213 bp->bio_resid = 0; 214 215 biofinish(bp, &sc->mlxd_stats, 0); 216} 217 218static int 219mlxd_probe(device_t dev) 220{ 221 222 debug_called(1); 223 224 device_set_desc(dev, "Mylex System Drive"); 225 return (0); 226} 227 228static int 229mlxd_attach(device_t dev) 230{ 231 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 232 device_t parent; 233 char *state; 234 dev_t dsk; 235 int s1, s2; 236 237 debug_called(1); 238 239 parent = device_get_parent(dev); 240 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 241 sc->mlxd_unit = device_get_unit(dev); 242 sc->mlxd_drive = device_get_ivars(dev); 243 sc->mlxd_dev = dev; 244 245 switch(sc->mlxd_drive->ms_state) { 246 case MLX_SYSD_ONLINE: 247 state = "online"; 248 break; 249 case MLX_SYSD_CRITICAL: 250 state = "critical"; 251 break; 252 case MLX_SYSD_OFFLINE: 253 state = "offline"; 254 break; 255 default: 256 state = "unknown state"; 257 } 258 259 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 260 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 261 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 262 263 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 264 DEVSTAT_NO_ORDERED_TAGS, 265 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 266 DEVSTAT_PRIORITY_ARRAY); 267 268 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 269 dsk->si_drv1 = sc; 270 sc->mlxd_dev_t = dsk; 271 272 /* 273 * Set maximum I/O size to the lesser of the recommended maximum and the practical 274 * maximum. 275 */ 276 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 277 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 278 dsk->si_iosize_max = imin(s1, s2); 279 280 return (0); 281} 282 283static int 284mlxd_detach(device_t dev) 285{ 286 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 287 288 debug_called(1); 289 290 devstat_remove_entry(&sc->mlxd_stats); 291 disk_destroy(sc->mlxd_dev_t); 292 293 return(0); 294} 295 296