mlx_disk.c revision 59249
175584Sru/*- 275584Sru * Copyright (c) 1999 Jonathan Lemon 375584Sru * Copyright (c) 1999 Michael Smith 475584Sru * All rights reserved. 575584Sru * 618099Spst * Redistribution and use in source and binary forms, with or without 718099Spst * modification, are permitted provided that the following conditions 818099Spst * are met: 918099Spst * 1. Redistributions of source code must retain the above copyright 1018099Spst * notice, this list of conditions and the following disclaimer. 1118099Spst * 2. Redistributions in binary form must reproduce the above copyright 1218099Spst * notice, this list of conditions and the following disclaimer in the 1318099Spst * documentation and/or other materials provided with the distribution. 1418099Spst * 1518099Spst * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1618099Spst * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1718099Spst * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1869626Sru * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1969626Sru * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2069626Sru * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2169626Sru * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2269626Sru * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2318099Spst * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2418099Spst * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2518099Spst * SUCH DAMAGE. 2618099Spst * 2718099Spst * $FreeBSD: head/sys/dev/mlx/mlx_disk.c 59249 2000-04-15 05:54:02Z phk $ 2818099Spst */ 2918099Spst 3018099Spst/* 3118099Spst * Disk driver for Mylex DAC960 RAID adapters. 3218099Spst */ 3375584Sru 3475584Sru#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/malloc.h> 37#include <sys/kernel.h> 38 39#include <sys/buf.h> 40#include <sys/bus.h> 41#include <sys/conf.h> 42#include <sys/devicestat.h> 43#include <sys/disk.h> 44 45#include <machine/bus.h> 46#include <machine/clock.h> 47#include <sys/rman.h> 48 49#include <dev/mlx/mlxio.h> 50#include <dev/mlx/mlxvar.h> 51#include <dev/mlx/mlxreg.h> 52 53/* prototypes */ 54static int mlxd_probe(device_t dev); 55static int mlxd_attach(device_t dev); 56static int mlxd_detach(device_t dev); 57 58static d_open_t mlxd_open; 59static d_close_t mlxd_close; 60static d_strategy_t mlxd_strategy; 61static d_ioctl_t mlxd_ioctl; 62 63#define MLXD_BDEV_MAJOR 27 64#define MLXD_CDEV_MAJOR 131 65 66static struct cdevsw mlxd_cdevsw = { 67 /* open */ mlxd_open, 68 /* close */ mlxd_close, 69 /* read */ physread, 70 /* write */ physwrite, 71 /* ioctl */ mlxd_ioctl, 72 /* poll */ nopoll, 73 /* mmap */ nommap, 74 /* strategy */ mlxd_strategy, 75 /* name */ "mlxd", 76 /* maj */ MLXD_CDEV_MAJOR, 77 /* dump */ nodump, 78 /* psize */ nopsize, 79 /* flags */ D_DISK, 80 /* bmaj */ MLXD_BDEV_MAJOR 81}; 82 83devclass_t mlxd_devclass; 84static struct cdevsw mlxddisk_cdevsw; 85 86static device_method_t mlxd_methods[] = { 87 DEVMETHOD(device_probe, mlxd_probe), 88 DEVMETHOD(device_attach, mlxd_attach), 89 DEVMETHOD(device_detach, mlxd_detach), 90 { 0, 0 } 91}; 92 93static driver_t mlxd_driver = { 94 "mlxd", 95 mlxd_methods, 96 sizeof(struct mlxd_softc) 97}; 98 99DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 100 101static int 102mlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 103{ 104 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 105 struct disklabel *label; 106 107 debug_called(1); 108 109 if (sc == NULL) 110 return (ENXIO); 111 112 /* controller not active? */ 113 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 114 return(ENXIO); 115 116 label = &sc->mlxd_disk.d_label; 117 bzero(label, sizeof(*label)); 118 label->d_type = DTYPE_SCSI; 119 label->d_secsize = MLX_BLKSIZE; 120 label->d_nsectors = sc->mlxd_drive->ms_sectors; 121 label->d_ntracks = sc->mlxd_drive->ms_heads; 122 label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 123 label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 124 label->d_secperunit = sc->mlxd_drive->ms_size; 125 126 sc->mlxd_flags |= MLXD_OPEN; 127 return (0); 128} 129 130static int 131mlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 132{ 133 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 134 135 debug_called(1); 136 137 if (sc == NULL) 138 return (ENXIO); 139 sc->mlxd_flags &= ~MLXD_OPEN; 140 return (0); 141} 142 143static int 144mlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 145{ 146 struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 147 int error; 148 149 debug_called(1); 150 151 if (sc == NULL) 152 return (ENXIO); 153 154 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 155 debug(0, "mlx_submit_ioctl returned %d\n", error); 156 return(error); 157 } 158 return (ENOTTY); 159} 160 161/* 162 * Read/write routine for a buffer. Finds the proper unit, range checks 163 * arguments, and schedules the transfer. Does not wait for the transfer 164 * to complete. Multi-page transfers are supported. All I/O requests must 165 * be a multiple of a sector in length. 166 */ 167static void 168mlxd_strategy(struct bio *bp) 169{ 170 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 171 172 debug_called(1); 173 174 /* bogus disk? */ 175 if (sc == NULL) { 176 bp->bio_error = EINVAL; 177 goto bad; 178 } 179 180 /* XXX may only be temporarily offline - sleep? */ 181 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 182 bp->bio_error = ENXIO; 183 goto bad; 184 } 185 186 /* do-nothing operation */ 187 if (bp->bio_bcount == 0) 188 goto done; 189 190 devstat_start_transaction(&sc->mlxd_stats); 191 mlx_submit_buf(sc->mlxd_controller, bp); 192 return; 193 194 bad: 195 bp->bio_flags |= BIO_ERROR; 196 197 done: 198 /* 199 * Correctly set the buf to indicate a completed transfer 200 */ 201 bp->bio_resid = bp->bio_bcount; 202 biodone(bp); 203 return; 204} 205 206void 207mlxd_intr(void *data) 208{ 209 struct bio *bp = (struct bio *)data; 210 struct mlxd_softc *sc = (struct mlxd_softc *)bp->bio_dev->si_drv1; 211 212 debug_called(1); 213 214 if (bp->bio_flags & BIO_ERROR) 215 bp->bio_error = EIO; 216 else 217 bp->bio_resid = 0; 218 219 devstat_end_transaction_bio(&sc->mlxd_stats, bp); 220 biodone(bp); 221} 222 223static int 224mlxd_probe(device_t dev) 225{ 226 227 debug_called(1); 228 229 device_set_desc(dev, "Mylex System Drive"); 230 return (0); 231} 232 233static int 234mlxd_attach(device_t dev) 235{ 236 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 237 device_t parent; 238 char *state; 239 dev_t dsk; 240 241 debug_called(1); 242 243 parent = device_get_parent(dev); 244 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 245 sc->mlxd_unit = device_get_unit(dev); 246 sc->mlxd_drive = device_get_ivars(dev); 247 sc->mlxd_dev = dev; 248 249 switch(sc->mlxd_drive->ms_state) { 250 case MLX_SYSD_ONLINE: 251 state = "online"; 252 break; 253 case MLX_SYSD_CRITICAL: 254 state = "critical"; 255 break; 256 case MLX_SYSD_OFFLINE: 257 state = "offline"; 258 break; 259 default: 260 state = "unknown state"; 261 } 262 263 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 264 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 265 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 266 267 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 268 DEVSTAT_NO_ORDERED_TAGS, 269 DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 270 DEVSTAT_PRIORITY_ARRAY); 271 272 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 273 dsk->si_drv1 = sc; 274 sc->mlxd_dev_t = dsk; 275 276 /* set maximum I/O size */ 277 dsk->si_iosize_max = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 278 279 return (0); 280} 281 282static int 283mlxd_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_dev_t); 291 292 return(0); 293} 294 295