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 1.7 2004/05/13 23:49:19 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(mlx_bio *bp) 168 { 169 struct mlxd_softc *sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp); 170 171 debug_called(1); 172 173 /* bogus disk? */ 174 if (sc == NULL) { 175 MLX_BIO_SET_ERROR(bp, 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 MLX_BIO_SET_ERROR(bp, ENXIO); 182 goto bad; 183 } 184 185 MLX_BIO_STATS_START(bp); 186 mlx_submit_buf(sc->mlxd_controller, bp); 187 return; 188 189 bad: 190 /* 191 * Correctly set the bio to indicate a failed tranfer. 192 */ 193 MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp); 194 MLX_BIO_DONE(bp); 195 return; 196 } 197 198 void 199 mlxd_intr(void *data) 200 { 201 mlx_bio *bp = (mlx_bio *)data; 202 203 debug_called(1); 204 205 if (MLX_BIO_HAS_ERROR(bp)) 206 MLX_BIO_SET_ERROR(bp, EIO); 207 else 208 MLX_BIO_RESID(bp) = 0; 209 210 MLX_BIO_STATS_END(bp); 211 MLX_BIO_DONE(bp); 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); 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_disk); 288 289 return(0); 290 } 291 292