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 /* 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 } 201 202 void 203 mlxd_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 devstat_end_transaction_bio(&sc->mlxd_stats, bp); 216 biodone(bp); 217 } 218 219 static int 220 mlxd_probe(device_t dev) 221 { 222 223 debug_called(1); 224 225 device_set_desc(dev, "Mylex System Drive"); 226 return (0); 227 } 228 229 static int 230 mlxd_attach(device_t dev) 231 { 232 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 233 device_t parent; 234 char *state; 235 dev_t dsk; 236 int s1, s2; 237 238 debug_called(1); 239 240 parent = device_get_parent(dev); 241 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 242 sc->mlxd_unit = device_get_unit(dev); 243 sc->mlxd_drive = device_get_ivars(dev); 244 sc->mlxd_dev = dev; 245 246 switch(sc->mlxd_drive->ms_state) { 247 case MLX_SYSD_ONLINE: 248 state = "online"; 249 break; 250 case MLX_SYSD_CRITICAL: 251 state = "critical"; 252 break; 253 case MLX_SYSD_OFFLINE: 254 state = "offline"; 255 break; 256 default: 257 state = "unknown state"; 258 } 259 260 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 261 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 262 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 263 264 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 265 DEVSTAT_NO_ORDERED_TAGS, 266 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 267 DEVSTAT_PRIORITY_ARRAY); 268 269 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 270 dsk->si_drv1 = sc; 271 sc->mlxd_dev_t = dsk; 272 273 /* 274 * Set maximum I/O size to the lesser of the recommended maximum and the practical 275 * maximum. 276 */ 277 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 278 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 279 dsk->si_iosize_max = imin(s1, s2); 280 281 return (0); 282 } 283 284 static int 285 mlxd_detach(device_t dev) 286 { 287 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 288 289 debug_called(1); 290 291 devstat_remove_entry(&sc->mlxd_stats); 292 disk_destroy(sc->mlxd_dev_t); 293 294 return(0); 295 } 296 297