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 1.11 2006/10/25 20:56:01 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/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 #define MLXD_CDEV_MAJOR 131 60 61 static struct dev_ops mlxd_ops = { 62 { "mlxd", MLXD_CDEV_MAJOR, D_DISK }, 63 .d_open = mlxd_open, 64 .d_close = mlxd_close, 65 .d_read = physread, 66 .d_write = physwrite, 67 .d_ioctl = mlxd_ioctl, 68 .d_strategy = mlxd_strategy, 69 }; 70 71 devclass_t mlxd_devclass; 72 73 static device_method_t mlxd_methods[] = { 74 DEVMETHOD(device_probe, mlxd_probe), 75 DEVMETHOD(device_attach, mlxd_attach), 76 DEVMETHOD(device_detach, mlxd_detach), 77 { 0, 0 } 78 }; 79 80 static driver_t mlxd_driver = { 81 "mlxd", 82 mlxd_methods, 83 sizeof(struct mlxd_softc) 84 }; 85 86 DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 87 88 static int 89 mlxd_open(struct dev_open_args *ap) 90 { 91 cdev_t dev = ap->a_head.a_dev; 92 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 93 struct disklabel *label; 94 95 debug_called(1); 96 97 if (sc == NULL) 98 return (ENXIO); 99 100 /* controller not active? */ 101 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 102 return(ENXIO); 103 104 label = &sc->mlxd_disk.d_label; 105 bzero(label, sizeof(*label)); 106 label->d_type = DTYPE_SCSI; 107 label->d_secsize = MLX_BLKSIZE; 108 label->d_nsectors = sc->mlxd_drive->ms_sectors; 109 label->d_ntracks = sc->mlxd_drive->ms_heads; 110 label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 111 label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 112 label->d_secperunit = sc->mlxd_drive->ms_size; 113 114 sc->mlxd_flags |= MLXD_OPEN; 115 return (0); 116 } 117 118 static int 119 mlxd_close(struct dev_close_args *ap) 120 { 121 cdev_t dev = ap->a_head.a_dev; 122 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 123 124 debug_called(1); 125 126 if (sc == NULL) 127 return (ENXIO); 128 sc->mlxd_flags &= ~MLXD_OPEN; 129 return (0); 130 } 131 132 static int 133 mlxd_ioctl(struct dev_ioctl_args *ap) 134 { 135 cdev_t dev = ap->a_head.a_dev; 136 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 137 int error; 138 139 debug_called(1); 140 141 if (sc == NULL) 142 return (ENXIO); 143 144 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, ap->a_cmd, ap->a_data, ap->a_fflag)) != ENOIOCTL) { 145 debug(0, "mlx_submit_ioctl returned %d\n", error); 146 return(error); 147 } 148 return (ENOTTY); 149 } 150 151 /* 152 * Read/write routine for a buffer. Finds the proper unit, range checks 153 * arguments, and schedules the transfer. Does not wait for the transfer 154 * to complete. Multi-page transfers are supported. All I/O requests must 155 * be a multiple of a sector in length. 156 */ 157 static int 158 mlxd_strategy(struct dev_strategy_args *ap) 159 { 160 struct bio *bio = ap->a_bio; 161 struct buf *bp = bio->bio_buf; 162 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 163 164 debug_called(1); 165 166 /* bogus disk? */ 167 if (sc == NULL) { 168 bp->b_error = EINVAL; 169 bp->b_flags |= B_ERROR; 170 goto bad; 171 } 172 173 /* XXX may only be temporarily offline - sleep? */ 174 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 175 bp->b_error = ENXIO; 176 bp->b_flags |= B_ERROR; 177 goto bad; 178 } 179 180 devstat_start_transaction(&sc->mlxd_stats); 181 mlx_submit_bio(sc->mlxd_controller, bio); 182 return(0); 183 184 bad: 185 /* 186 * Correctly set the bio to indicate a failed tranfer. 187 */ 188 bp->b_resid = bp->b_bcount; 189 biodone(bio); 190 return(0); 191 } 192 193 void 194 mlxd_intr(struct bio *bio) 195 { 196 struct buf *bp = bio->bio_buf; 197 struct mlxd_softc *sc = (struct mlxd_softc *)bio->bio_driver_info; 198 199 debug_called(1); 200 201 if (bp->b_flags & B_ERROR) 202 bp->b_error = EIO; 203 else 204 bp->b_resid = 0; 205 devstat_end_transaction_buf(&sc->mlxd_stats, bp); 206 biodone(bio); 207 } 208 209 static int 210 mlxd_probe(device_t dev) 211 { 212 213 debug_called(1); 214 215 device_set_desc(dev, "Mylex System Drive"); 216 return (0); 217 } 218 219 static int 220 mlxd_attach(device_t dev) 221 { 222 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 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, 0, &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 return (0); 272 } 273 274 static int 275 mlxd_detach(device_t dev) 276 { 277 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 278 279 debug_called(1); 280 281 devstat_remove_entry(&sc->mlxd_stats); 282 disk_destroy(&sc->mlxd_disk); 283 284 return(0); 285 } 286 287