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 * $FreeBSD$ 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/buf.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 <machine/clock.h> 46 #include <sys/rman.h> 47 48 #include <dev/mlx/mlxio.h> 49 #include <dev/mlx/mlxvar.h> 50 #include <dev/mlx/mlxreg.h> 51 52 /* prototypes */ 53 static int mlxd_probe(device_t dev); 54 static int mlxd_attach(device_t dev); 55 static int mlxd_detach(device_t dev); 56 57 static d_open_t mlxd_open; 58 static d_close_t mlxd_close; 59 static d_strategy_t mlxd_strategy; 60 static d_ioctl_t mlxd_ioctl; 61 62 #define MLXD_BDEV_MAJOR 27 63 #define MLXD_CDEV_MAJOR 131 64 65 static struct cdevsw mlxd_cdevsw = { 66 /* open */ mlxd_open, 67 /* close */ mlxd_close, 68 /* read */ physread, 69 /* write */ physwrite, 70 /* ioctl */ mlxd_ioctl, 71 /* poll */ nopoll, 72 /* mmap */ nommap, 73 /* strategy */ mlxd_strategy, 74 /* name */ "mlxd", 75 /* maj */ MLXD_CDEV_MAJOR, 76 /* dump */ nodump, 77 /* psize */ nopsize, 78 /* flags */ D_DISK, 79 /* bmaj */ MLXD_BDEV_MAJOR 80 }; 81 82 devclass_t mlxd_devclass; 83 static struct cdevsw mlxddisk_cdevsw; 84 85 static device_method_t mlxd_methods[] = { 86 DEVMETHOD(device_probe, mlxd_probe), 87 DEVMETHOD(device_attach, mlxd_attach), 88 DEVMETHOD(device_detach, mlxd_detach), 89 { 0, 0 } 90 }; 91 92 static driver_t mlxd_driver = { 93 "mlxd", 94 mlxd_methods, 95 sizeof(struct mlxd_softc) 96 }; 97 98 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 99 100 static int 101 mlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 102 { 103 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 104 struct disklabel *label; 105 106 debug_called(1); 107 108 if (sc == NULL) 109 return (ENXIO); 110 111 /* controller not active? */ 112 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 113 return(ENXIO); 114 115 label = &sc->mlxd_disk.d_label; 116 bzero(label, sizeof(*label)); 117 label->d_type = DTYPE_SCSI; 118 label->d_secsize = MLX_BLKSIZE; 119 label->d_nsectors = sc->mlxd_drive->ms_sectors; 120 label->d_ntracks = sc->mlxd_drive->ms_heads; 121 label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 122 label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 123 label->d_secperunit = sc->mlxd_drive->ms_size; 124 125 sc->mlxd_flags |= MLXD_OPEN; 126 return (0); 127 } 128 129 static int 130 mlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 131 { 132 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 133 134 debug_called(1); 135 136 if (sc == NULL) 137 return (ENXIO); 138 sc->mlxd_flags &= ~MLXD_OPEN; 139 return (0); 140 } 141 142 static int 143 mlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 144 { 145 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 146 int error; 147 148 debug_called(1); 149 150 if (sc == NULL) 151 return (ENXIO); 152 153 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 154 debug(0, "mlx_submit_ioctl returned %d\n", error); 155 return(error); 156 } 157 return (ENOTTY); 158 } 159 160 /* 161 * Read/write routine for a buffer. Finds the proper unit, range checks 162 * arguments, and schedules the transfer. Does not wait for the transfer 163 * to complete. Multi-page transfers are supported. All I/O requests must 164 * be a multiple of a sector in length. 165 */ 166 static void 167 mlxd_strategy(struct bio *bp) 168 { 169 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 170 171 debug_called(1); 172 173 /* bogus disk? */ 174 if (sc == NULL) { 175 bp->bio_error = EINVAL; 176 goto bad; 177 } 178 179 /* XXX may only be temporarily offline - sleep? */ 180 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 181 bp->bio_error = ENXIO; 182 goto bad; 183 } 184 185 /* do-nothing operation */ 186 if (bp->bio_bcount == 0) 187 goto done; 188 189 devstat_start_transaction(&sc->mlxd_stats); 190 mlx_submit_buf(sc->mlxd_controller, bp); 191 return; 192 193 bad: 194 bp->bio_flags |= BIO_ERROR; 195 196 done: 197 /* 198 * Correctly set the buf to indicate a completed transfer 199 */ 200 bp->bio_resid = bp->bio_bcount; 201 biodone(bp); 202 return; 203 } 204 205 void 206 mlxd_intr(void *data) 207 { 208 struct bio *bp = (struct bio *)data; 209 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 210 211 debug_called(1); 212 213 if (bp->bio_flags & BIO_ERROR) 214 bp->bio_error = EIO; 215 else 216 bp->bio_resid = 0; 217 218 devstat_end_transaction_bio(&sc->mlxd_stats, bp); 219 biodone(bp); 220 } 221 222 static int 223 mlxd_probe(device_t dev) 224 { 225 226 debug_called(1); 227 228 device_set_desc(dev, "Mylex System Drive"); 229 return (0); 230 } 231 232 static int 233 mlxd_attach(device_t dev) 234 { 235 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 236 device_t parent; 237 char *state; 238 dev_t dsk; 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 /* set maximum I/O size */ 276 dsk->si_iosize_max = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 277 278 return (0); 279 } 280 281 static int 282 mlxd_detach(device_t dev) 283 { 284 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 285 286 debug_called(1); 287 288 devstat_remove_entry(&sc->mlxd_stats); 289 disk_destroy(sc->mlxd_dev_t); 290 291 return(0); 292 } 293 294