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 * $DragonFly: src/sys/dev/raid/mlx/mlx_disk.c,v 1.8 2006/02/17 19:18:05 dillon Exp $ 29 */ 30 31 /* 32 * Disk driver for Mylex DAC960 RAID adapters. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 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 "mlx_compat.h" 48 #include "mlxio.h" 49 #include "mlxvar.h" 50 #include "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_CDEV_MAJOR 131 63 64 static struct cdevsw mlxd_cdevsw = { 65 /* name */ "mlxd", 66 /* maj */ MLXD_CDEV_MAJOR, 67 /* flags */ D_DISK, 68 /* port */ NULL, 69 /* clone */ NULL, 70 71 /* open */ mlxd_open, 72 /* close */ mlxd_close, 73 /* read */ physread, 74 /* write */ physwrite, 75 /* ioctl */ mlxd_ioctl, 76 /* poll */ nopoll, 77 /* mmap */ nommap, 78 /* strategy */ mlxd_strategy, 79 /* dump */ nodump, 80 /* psize */ nopsize 81 }; 82 83 devclass_t mlxd_devclass; 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, d_thread_t *td) 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, d_thread_t *td) 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, d_thread_t *td) 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, td)) != 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(dev_t dev, mlx_bio *bio) 168 { 169 struct buf *bp = bio->bio_buf; 170 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 171 172 debug_called(1); 173 174 /* bogus disk? */ 175 if (sc == NULL) { 176 bp->b_error = EINVAL; 177 bp->b_flags |= B_ERROR; 178 goto bad; 179 } 180 181 /* XXX may only be temporarily offline - sleep? */ 182 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 183 bp->b_error = ENXIO; 184 bp->b_flags |= B_ERROR; 185 goto bad; 186 } 187 188 devstat_start_transaction(&sc->mlxd_stats); 189 mlx_submit_bio(sc->mlxd_controller, bio); 190 return; 191 192 bad: 193 /* 194 * Correctly set the bio to indicate a failed tranfer. 195 */ 196 bp->b_resid = bp->b_bcount; 197 biodone(bio); 198 return; 199 } 200 201 void 202 mlxd_intr(struct bio *bio) 203 { 204 struct buf *bp = bio->bio_buf; 205 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 206 207 debug_called(1); 208 209 if (bp->b_flags & B_ERROR) 210 bp->b_error = EIO; 211 else 212 bp->b_resid = 0; 213 devstat_end_transaction_buf(&sc->mlxd_stats, bp); 214 biodone(bio); 215 } 216 217 static int 218 mlxd_probe(device_t dev) 219 { 220 221 debug_called(1); 222 223 device_set_desc(dev, "Mylex System Drive"); 224 return (0); 225 } 226 227 static int 228 mlxd_attach(device_t dev) 229 { 230 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 231 device_t parent; 232 char *state; 233 dev_t dsk; 234 int s1, s2; 235 236 debug_called(1); 237 238 parent = device_get_parent(dev); 239 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 240 sc->mlxd_unit = device_get_unit(dev); 241 sc->mlxd_drive = device_get_ivars(dev); 242 sc->mlxd_dev = dev; 243 244 switch(sc->mlxd_drive->ms_state) { 245 case MLX_SYSD_ONLINE: 246 state = "online"; 247 break; 248 case MLX_SYSD_CRITICAL: 249 state = "critical"; 250 break; 251 case MLX_SYSD_OFFLINE: 252 state = "offline"; 253 break; 254 default: 255 state = "unknown state"; 256 } 257 258 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 259 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 260 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 261 262 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 263 DEVSTAT_NO_ORDERED_TAGS, 264 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 265 DEVSTAT_PRIORITY_ARRAY); 266 267 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw); 268 dsk->si_drv1 = sc; 269 sc->mlxd_dev_t = dsk; 270 271 /* 272 * Set maximum I/O size to the lesser of the recommended maximum and the practical 273 * maximum. 274 */ 275 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 276 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 277 dsk->si_iosize_max = imin(s1, s2); 278 279 return (0); 280 } 281 282 static int 283 mlxd_detach(device_t dev) 284 { 285 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 286 287 debug_called(1); 288 289 devstat_remove_entry(&sc->mlxd_stats); 290 disk_destroy(&sc->mlxd_disk); 291 292 return(0); 293 } 294 295