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/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 */ 52 static int mlxd_probe(device_t dev); 53 static int mlxd_attach(device_t dev); 54 static int mlxd_detach(device_t dev); 55 56 static d_open_t mlxd_open; 57 static d_close_t mlxd_close; 58 static d_strategy_t mlxd_strategy; 59 static d_ioctl_t mlxd_ioctl; 60 61 #define MLXD_CDEV_MAJOR 131 62 63 static 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 79 devclass_t mlxd_devclass; 80 static struct cdevsw mlxddisk_cdevsw; 81 82 static 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 89 static driver_t mlxd_driver = { 90 "mlxd", 91 mlxd_methods, 92 sizeof(struct mlxd_softc) 93 }; 94 95 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 96 97 static int 98 mlxd_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 } 125 126 static int 127 mlxd_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 } 138 139 static int 140 mlxd_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 */ 163 static void 164 mlxd_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 devstat_start_transaction(&sc->mlxd_stats); 183 mlx_submit_buf(sc->mlxd_controller, bp); 184 return; 185 186 bad: 187 bp->bio_flags |= BIO_ERROR; 188 189 done: 190 /* 191 * Correctly set the buf to indicate a completed transfer 192 */ 193 bp->bio_resid = bp->bio_bcount; 194 biodone(bp); 195 return; 196 } 197 198 void 199 mlxd_intr(void *data) 200 { 201 struct bio *bp = (struct bio *)data; 202 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 203 204 debug_called(1); 205 206 if (bp->bio_flags & BIO_ERROR) 207 bp->bio_error = EIO; 208 else 209 bp->bio_resid = 0; 210 211 biofinish(bp, &sc->mlxd_stats, 0); 212 } 213 214 static int 215 mlxd_probe(device_t dev) 216 { 217 218 debug_called(1); 219 220 device_set_desc(dev, "Mylex System Drive"); 221 return (0); 222 } 223 224 static int 225 mlxd_attach(device_t dev) 226 { 227 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 228 device_t parent; 229 char *state; 230 dev_t dsk; 231 int s1, s2; 232 233 debug_called(1); 234 235 parent = device_get_parent(dev); 236 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 237 sc->mlxd_unit = device_get_unit(dev); 238 sc->mlxd_drive = device_get_ivars(dev); 239 sc->mlxd_dev = dev; 240 241 switch(sc->mlxd_drive->ms_state) { 242 case MLX_SYSD_ONLINE: 243 state = "online"; 244 break; 245 case MLX_SYSD_CRITICAL: 246 state = "critical"; 247 break; 248 case MLX_SYSD_OFFLINE: 249 state = "offline"; 250 break; 251 default: 252 state = "unknown state"; 253 } 254 255 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 256 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 257 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 258 259 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 260 DEVSTAT_NO_ORDERED_TAGS, 261 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 262 DEVSTAT_PRIORITY_ARRAY); 263 264 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 265 dsk->si_drv1 = sc; 266 sc->mlxd_dev_t = dsk; 267 268 /* 269 * Set maximum I/O size to the lesser of the recommended maximum and the practical 270 * maximum. 271 */ 272 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 273 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 274 dsk->si_iosize_max = imin(s1, s2); 275 276 return (0); 277 } 278 279 static int 280 mlxd_detach(device_t dev) 281 { 282 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 283 284 debug_called(1); 285 286 devstat_remove_entry(&sc->mlxd_stats); 287 disk_destroy(sc->mlxd_dev_t); 288 289 return(0); 290 } 291 292