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 1.13 2007/06/17 23:50:16 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 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/devicestat.h> 41 #include <sys/disk.h> 42 #include <sys/dtype.h> 43 #include <sys/rman.h> 44 45 #include "mlx_compat.h" 46 #include "mlxio.h" 47 #include "mlxvar.h" 48 #include "mlxreg.h" 49 50 /* prototypes */ 51 static int mlxd_probe(device_t dev); 52 static int mlxd_attach(device_t dev); 53 static int mlxd_detach(device_t dev); 54 55 static d_open_t mlxd_open; 56 static d_close_t mlxd_close; 57 static d_strategy_t mlxd_strategy; 58 static d_ioctl_t mlxd_ioctl; 59 60 #define MLXD_CDEV_MAJOR 131 61 62 static struct dev_ops mlxd_ops = { 63 { "mlxd", MLXD_CDEV_MAJOR, D_DISK }, 64 .d_open = mlxd_open, 65 .d_close = mlxd_close, 66 .d_read = physread, 67 .d_write = physwrite, 68 .d_ioctl = mlxd_ioctl, 69 .d_strategy = mlxd_strategy, 70 }; 71 72 devclass_t mlxd_devclass; 73 74 static device_method_t mlxd_methods[] = { 75 DEVMETHOD(device_probe, mlxd_probe), 76 DEVMETHOD(device_attach, mlxd_attach), 77 DEVMETHOD(device_detach, mlxd_detach), 78 { 0, 0 } 79 }; 80 81 static driver_t mlxd_driver = { 82 "mlxd", 83 mlxd_methods, 84 sizeof(struct mlxd_softc) 85 }; 86 87 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 88 89 static int 90 mlxd_open(struct dev_open_args *ap) 91 { 92 cdev_t dev = ap->a_head.a_dev; 93 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 94 struct disk_info info; 95 96 debug_called(1); 97 98 if (sc == NULL) 99 return (ENXIO); 100 101 /* controller not active? */ 102 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 103 return(ENXIO); 104 105 bzero(&info, sizeof(info)); 106 info.d_media_blksize= MLX_BLKSIZE; /* mandatory */ 107 info.d_media_blocks = sc->mlxd_drive->ms_size; 108 109 info.d_type = DTYPE_SCSI; /* optional */ 110 info.d_secpertrack = sc->mlxd_drive->ms_sectors; 111 info.d_nheads = sc->mlxd_drive->ms_heads; 112 info.d_ncylinders = sc->mlxd_drive->ms_cylinders; 113 info.d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 114 115 disk_setdiskinfo(&sc->mlxd_disk, &info); 116 117 sc->mlxd_flags |= MLXD_OPEN; 118 return (0); 119 } 120 121 static int 122 mlxd_close(struct dev_close_args *ap) 123 { 124 cdev_t dev = ap->a_head.a_dev; 125 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 126 127 debug_called(1); 128 129 if (sc == NULL) 130 return (ENXIO); 131 sc->mlxd_flags &= ~MLXD_OPEN; 132 return (0); 133 } 134 135 static int 136 mlxd_ioctl(struct dev_ioctl_args *ap) 137 { 138 cdev_t dev = ap->a_head.a_dev; 139 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 140 int error; 141 142 debug_called(1); 143 144 if (sc == NULL) 145 return (ENXIO); 146 147 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, ap->a_cmd, ap->a_data, ap->a_fflag)) != ENOIOCTL) { 148 debug(0, "mlx_submit_ioctl returned %d\n", error); 149 return(error); 150 } 151 return (ENOTTY); 152 } 153 154 /* 155 * Read/write routine for a buffer. Finds the proper unit, range checks 156 * arguments, and schedules the transfer. Does not wait for the transfer 157 * to complete. Multi-page transfers are supported. All I/O requests must 158 * be a multiple of a sector in length. 159 */ 160 static int 161 mlxd_strategy(struct dev_strategy_args *ap) 162 { 163 struct bio *bio = ap->a_bio; 164 struct buf *bp = bio->bio_buf; 165 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 166 167 debug_called(1); 168 169 /* bogus disk? */ 170 if (sc == NULL) { 171 bp->b_error = EINVAL; 172 bp->b_flags |= B_ERROR; 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->b_error = ENXIO; 179 bp->b_flags |= B_ERROR; 180 goto bad; 181 } 182 183 devstat_start_transaction(&sc->mlxd_stats); 184 mlx_submit_bio(sc->mlxd_controller, bio); 185 return(0); 186 187 bad: 188 /* 189 * Correctly set the bio to indicate a failed tranfer. 190 */ 191 bp->b_resid = bp->b_bcount; 192 biodone(bio); 193 return(0); 194 } 195 196 void 197 mlxd_intr(struct bio *bio) 198 { 199 struct buf *bp = bio->bio_buf; 200 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 201 202 debug_called(1); 203 204 if (bp->b_flags & B_ERROR) 205 bp->b_error = EIO; 206 else 207 bp->b_resid = 0; 208 devstat_end_transaction_buf(&sc->mlxd_stats, bp); 209 biodone(bio); 210 } 211 212 static int 213 mlxd_probe(device_t dev) 214 { 215 216 debug_called(1); 217 218 device_set_desc(dev, "Mylex System Drive"); 219 return (0); 220 } 221 222 static int 223 mlxd_attach(device_t dev) 224 { 225 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 226 device_t parent; 227 char *state; 228 cdev_t dsk; 229 int s1, s2; 230 231 debug_called(1); 232 233 parent = device_get_parent(dev); 234 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 235 sc->mlxd_unit = device_get_unit(dev); 236 sc->mlxd_drive = device_get_ivars(dev); 237 sc->mlxd_dev = dev; 238 239 switch(sc->mlxd_drive->ms_state) { 240 case MLX_SYSD_ONLINE: 241 state = "online"; 242 break; 243 case MLX_SYSD_CRITICAL: 244 state = "critical"; 245 break; 246 case MLX_SYSD_OFFLINE: 247 state = "offline"; 248 break; 249 default: 250 state = "unknown state"; 251 } 252 253 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 254 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 255 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 256 257 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 258 DEVSTAT_NO_ORDERED_TAGS, 259 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 260 DEVSTAT_PRIORITY_ARRAY); 261 262 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, &mlxd_ops); 263 dsk->si_drv1 = sc; 264 sc->mlxd_dev_t = dsk; 265 266 /* 267 * Set maximum I/O size to the lesser of the recommended maximum and the practical 268 * maximum. 269 */ 270 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 271 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 272 dsk->si_iosize_max = imin(s1, s2); 273 274 return (0); 275 } 276 277 static int 278 mlxd_detach(device_t dev) 279 { 280 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 281 282 debug_called(1); 283 284 devstat_remove_entry(&sc->mlxd_stats); 285 disk_destroy(&sc->mlxd_disk); 286 287 return(0); 288 } 289 290