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: src/sys/dev/mlx/mlx_disk.c,v 1.8.2.4 2001/06/25 04:37:51 msmith Exp $ 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 #include <sys/bus.h> 38 #include <sys/conf.h> 39 #include <sys/devicestat.h> 40 #include <sys/disk.h> 41 #include <sys/dtype.h> 42 #include <sys/rman.h> 43 44 #include "mlx_compat.h" 45 #include "mlxio.h" 46 #include "mlxvar.h" 47 #include "mlxreg.h" 48 49 /* prototypes */ 50 static int mlxd_probe(device_t dev); 51 static int mlxd_attach(device_t dev); 52 static int mlxd_detach(device_t dev); 53 54 static d_open_t mlxd_open; 55 static d_close_t mlxd_close; 56 static d_strategy_t mlxd_strategy; 57 static d_ioctl_t mlxd_ioctl; 58 59 static struct dev_ops mlxd_ops = { 60 { "mlxd", 0, D_DISK }, 61 .d_open = mlxd_open, 62 .d_close = mlxd_close, 63 .d_read = physread, 64 .d_write = physwrite, 65 .d_ioctl = mlxd_ioctl, 66 .d_strategy = mlxd_strategy, 67 }; 68 69 devclass_t mlxd_devclass; 70 71 static device_method_t mlxd_methods[] = { 72 DEVMETHOD(device_probe, mlxd_probe), 73 DEVMETHOD(device_attach, mlxd_attach), 74 DEVMETHOD(device_detach, mlxd_detach), 75 { 0, 0 } 76 }; 77 78 static driver_t mlxd_driver = { 79 "mlxd", 80 mlxd_methods, 81 sizeof(struct mlxd_softc) 82 }; 83 84 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 85 86 static int 87 mlxd_open(struct dev_open_args *ap) 88 { 89 cdev_t dev = ap->a_head.a_dev; 90 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 91 92 debug_called(1); 93 94 if (sc == NULL) 95 return (ENXIO); 96 97 /* controller not active? */ 98 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 99 return(ENXIO); 100 #if 0 101 bzero(&info, sizeof(info)); 102 info.d_media_blksize= MLX_BLKSIZE; /* mandatory */ 103 info.d_media_blocks = sc->mlxd_drive->ms_size; 104 105 info.d_type = DTYPE_SCSI; /* optional */ 106 info.d_secpertrack = sc->mlxd_drive->ms_sectors; 107 info.d_nheads = sc->mlxd_drive->ms_heads; 108 info.d_ncylinders = sc->mlxd_drive->ms_cylinders; 109 info.d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 110 111 disk_setdiskinfo(&sc->mlxd_disk, &info); 112 #endif 113 sc->mlxd_flags |= MLXD_OPEN; 114 return (0); 115 } 116 117 static int 118 mlxd_close(struct dev_close_args *ap) 119 { 120 cdev_t dev = ap->a_head.a_dev; 121 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 122 123 debug_called(1); 124 125 if (sc == NULL) 126 return (ENXIO); 127 sc->mlxd_flags &= ~MLXD_OPEN; 128 return (0); 129 } 130 131 static int 132 mlxd_ioctl(struct dev_ioctl_args *ap) 133 { 134 cdev_t dev = ap->a_head.a_dev; 135 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 136 int error; 137 138 debug_called(1); 139 140 if (sc == NULL) 141 return (ENXIO); 142 143 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, ap->a_cmd, ap->a_data, ap->a_fflag)) != ENOIOCTL) { 144 debug(0, "mlx_submit_ioctl returned %d\n", error); 145 return(error); 146 } 147 return (ENOTTY); 148 } 149 150 /* 151 * Read/write routine for a buffer. Finds the proper unit, range checks 152 * arguments, and schedules the transfer. Does not wait for the transfer 153 * to complete. Multi-page transfers are supported. All I/O requests must 154 * be a multiple of a sector in length. 155 */ 156 static int 157 mlxd_strategy(struct dev_strategy_args *ap) 158 { 159 struct bio *bio = ap->a_bio; 160 struct buf *bp = bio->bio_buf; 161 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 162 163 debug_called(1); 164 165 /* bogus disk? */ 166 if (sc == NULL) { 167 bp->b_error = EINVAL; 168 bp->b_flags |= B_ERROR; 169 goto bad; 170 } 171 172 /* XXX may only be temporarily offline - sleep? */ 173 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 174 bp->b_error = ENXIO; 175 bp->b_flags |= B_ERROR; 176 goto bad; 177 } 178 179 devstat_start_transaction(&sc->mlxd_stats); 180 mlx_submit_bio(sc->mlxd_controller, bio); 181 return(0); 182 183 bad: 184 /* 185 * Correctly set the bio to indicate a failed tranfer. 186 */ 187 bp->b_resid = bp->b_bcount; 188 biodone(bio); 189 return(0); 190 } 191 192 void 193 mlxd_intr(struct bio *bio) 194 { 195 struct buf *bp = bio->bio_buf; 196 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 197 198 debug_called(1); 199 200 if (bp->b_flags & B_ERROR) 201 bp->b_error = EIO; 202 else 203 bp->b_resid = 0; 204 devstat_end_transaction_buf(&sc->mlxd_stats, bp); 205 biodone(bio); 206 } 207 208 static int 209 mlxd_probe(device_t dev) 210 { 211 212 debug_called(1); 213 214 device_set_desc(dev, "Mylex System Drive"); 215 return (0); 216 } 217 218 static int 219 mlxd_attach(device_t dev) 220 { 221 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 222 struct disk_info info; 223 device_t parent; 224 char *state; 225 cdev_t dsk; 226 int s1, s2; 227 228 debug_called(1); 229 230 parent = device_get_parent(dev); 231 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 232 sc->mlxd_unit = device_get_unit(dev); 233 sc->mlxd_drive = device_get_ivars(dev); 234 sc->mlxd_dev = dev; 235 236 switch(sc->mlxd_drive->ms_state) { 237 case MLX_SYSD_ONLINE: 238 state = "online"; 239 break; 240 case MLX_SYSD_CRITICAL: 241 state = "critical"; 242 break; 243 case MLX_SYSD_OFFLINE: 244 state = "offline"; 245 break; 246 default: 247 state = "unknown state"; 248 } 249 250 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 251 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 252 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 253 254 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 255 DEVSTAT_NO_ORDERED_TAGS, 256 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 257 DEVSTAT_PRIORITY_ARRAY); 258 259 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, &mlxd_ops); 260 dsk->si_drv1 = sc; 261 sc->mlxd_dev_t = dsk; 262 263 /* 264 * Set maximum I/O size to the lesser of the recommended maximum and the practical 265 * maximum. 266 */ 267 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 268 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 269 dsk->si_iosize_max = imin(s1, s2); 270 271 /* 272 * Set disk info, as it appears that all needed data is available already. 273 * Setting the disk info will also cause the probing to start. 274 */ 275 bzero(&info, sizeof(info)); 276 info.d_media_blksize= MLX_BLKSIZE; /* mandatory */ 277 info.d_media_blocks = sc->mlxd_drive->ms_size; 278 279 info.d_type = DTYPE_SCSI; /* optional */ 280 info.d_secpertrack = sc->mlxd_drive->ms_sectors; 281 info.d_nheads = sc->mlxd_drive->ms_heads; 282 info.d_ncylinders = sc->mlxd_drive->ms_cylinders; 283 info.d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 284 285 disk_setdiskinfo(&sc->mlxd_disk, &info); 286 287 return (0); 288 } 289 290 static int 291 mlxd_detach(device_t dev) 292 { 293 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 294 295 debug_called(1); 296 297 devstat_remove_entry(&sc->mlxd_stats); 298 disk_destroy(&sc->mlxd_disk); 299 300 return(0); 301 } 302 303