mlx_disk.c revision 52785
1279527Sbapt/*- 2274876Sbapt * Copyright (c) 1999 Jonathan Lemon 3274876Sbapt * Copyright (c) 1999 Michael Smith 4274876Sbapt * All rights reserved. 5274876Sbapt * 6274876Sbapt * Redistribution and use in source and binary forms, with or without 7274876Sbapt * modification, are permitted provided that the following conditions 8274876Sbapt * are met: 9274876Sbapt * 1. Redistributions of source code must retain the above copyright 10274876Sbapt * notice, this list of conditions and the following disclaimer. 11274876Sbapt * 2. Redistributions in binary form must reproduce the above copyright 12274876Sbapt * notice, this list of conditions and the following disclaimer in the 13274876Sbapt * documentation and/or other materials provided with the distribution. 14274876Sbapt * 15274876Sbapt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16274876Sbapt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17279527Sbapt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18274876Sbapt * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19274876Sbapt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20274876Sbapt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21274876Sbapt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22274876Sbapt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23274876Sbapt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24274876Sbapt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25274876Sbapt * SUCH DAMAGE. 26274876Sbapt * 27274876Sbapt * $FreeBSD: head/sys/dev/mlx/mlx_disk.c 52785 1999-11-02 03:25:24Z msmith $ 28274876Sbapt */ 29274876Sbapt 30274876Sbapt/* 31274876Sbapt * Disk driver for Mylex DAC960 RAID adapters. 32274876Sbapt */ 33274876Sbapt 34274876Sbapt#include <sys/param.h> 35274876Sbapt#include <sys/systm.h> 36274876Sbapt#include <sys/malloc.h> 37274876Sbapt#include <sys/kernel.h> 38274876Sbapt 39274876Sbapt#include <sys/buf.h> 40274876Sbapt#include <sys/bus.h> 41274876Sbapt#include <sys/conf.h> 42274876Sbapt#include <sys/devicestat.h> 43274876Sbapt#include <sys/disk.h> 44274876Sbapt 45274876Sbapt#include <machine/bus.h> 46274876Sbapt#include <machine/clock.h> 47274876Sbapt#include <sys/rman.h> 48274876Sbapt 49274876Sbapt#include <dev/mlx/mlxio.h> 50274876Sbapt#include <dev/mlx/mlxvar.h> 51274876Sbapt#include <dev/mlx/mlxreg.h> 52274876Sbapt 53274876Sbapt#if 0 54274876Sbapt#define debug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args) 55274876Sbapt#else 56274876Sbapt#define debug(fmt, args...) 57274876Sbapt#endif 58274876Sbapt 59274876Sbapt/* prototypes */ 60274876Sbaptstatic int mlxd_probe(device_t dev); 61274876Sbaptstatic int mlxd_attach(device_t dev); 62274876Sbaptstatic int mlxd_detach(device_t dev); 63274876Sbapt 64274876Sbaptstatic d_open_t mlxd_open; 65274876Sbaptstatic d_close_t mlxd_close; 66274876Sbaptstatic d_strategy_t mlxd_strategy; 67274876Sbaptstatic d_ioctl_t mlxd_ioctl; 68274876Sbapt 69274876Sbapt#define MLXD_BDEV_MAJOR 27 70275432Sbapt#define MLXD_CDEV_MAJOR 131 71274876Sbapt 72275432Sbaptstatic struct cdevsw mlxd_cdevsw = { 73275432Sbapt /* open */ mlxd_open, 74275432Sbapt /* close */ mlxd_close, 75275432Sbapt /* read */ physread, 76275432Sbapt /* write */ physwrite, 77275432Sbapt /* ioctl */ mlxd_ioctl, 78275432Sbapt /* poll */ nopoll, 79275432Sbapt /* mmap */ nommap, 80275432Sbapt /* strategy */ mlxd_strategy, 81274876Sbapt /* name */ "mlxd", 82274876Sbapt /* maj */ MLXD_CDEV_MAJOR, 83274876Sbapt /* dump */ nodump, 84275432Sbapt /* psize */ nopsize, 85275432Sbapt /* flags */ D_DISK, 86275432Sbapt /* bmaj */ MLXD_BDEV_MAJOR 87275432Sbapt}; 88275432Sbapt 89275432Sbaptstatic devclass_t mlxd_devclass; 90274876Sbaptstatic struct cdevsw mlxddisk_cdevsw; 91274876Sbaptstatic int disks_registered = 0; 92274876Sbapt 93274876Sbaptstatic device_method_t mlxd_methods[] = { 94274876Sbapt DEVMETHOD(device_probe, mlxd_probe), 95274876Sbapt DEVMETHOD(device_attach, mlxd_attach), 96274876Sbapt DEVMETHOD(device_detach, mlxd_detach), 97274876Sbapt { 0, 0 } 98274876Sbapt}; 99274876Sbapt 100274876Sbaptstatic driver_t mlxd_driver = { 101274876Sbapt "mlxd", 102274876Sbapt mlxd_methods, 103274876Sbapt sizeof(struct mlxd_softc) 104274876Sbapt}; 105274876Sbapt 106274876SbaptDRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 107274876Sbapt 108274876Sbaptstatic int 109274876Sbaptmlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 110274876Sbapt{ 111274876Sbapt struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 112274876Sbapt struct disklabel *label; 113274876Sbapt 114274876Sbapt debug("called"); 115274876Sbapt 116274876Sbapt if (sc == NULL) 117274876Sbapt return (ENXIO); 118274876Sbapt 119274876Sbapt /* controller not active? */ 120279527Sbapt if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 121279527Sbapt return(ENXIO); 122274876Sbapt 123279527Sbapt label = &sc->mlxd_disk.d_label; 124274876Sbapt bzero(label, sizeof(*label)); 125274876Sbapt label->d_type = DTYPE_SCSI; 126274876Sbapt label->d_secsize = MLX_BLKSIZE; 127279527Sbapt label->d_nsectors = sc->mlxd_drive->ms_sectors; 128274876Sbapt label->d_ntracks = sc->mlxd_drive->ms_heads; 129274876Sbapt label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 130274876Sbapt label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 131274876Sbapt label->d_secperunit = sc->mlxd_drive->ms_size; 132274876Sbapt 133274876Sbapt sc->mlxd_flags |= MLXD_OPEN; 134274876Sbapt return (0); 135274876Sbapt} 136274876Sbapt 137274876Sbaptstatic int 138274876Sbaptmlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 139274876Sbapt{ 140274876Sbapt struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 141274876Sbapt 142274876Sbapt debug("called"); 143274876Sbapt 144274876Sbapt if (sc == NULL) 145274876Sbapt return (ENXIO); 146274876Sbapt sc->mlxd_flags &= ~MLXD_OPEN; 147274876Sbapt return (0); 148274876Sbapt} 149274876Sbapt 150274876Sbaptstatic int 151274876Sbaptmlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 152274876Sbapt{ 153274876Sbapt struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 154274876Sbapt int error; 155274876Sbapt 156274876Sbapt debug("called"); 157274876Sbapt 158 if (sc == NULL) 159 return (ENXIO); 160 161 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 162 debug("mlx_submit_ioctl returned %d\n", error); 163 return(error); 164 } 165 return (ENOTTY); 166} 167 168/* 169 * Read/write routine for a buffer. Finds the proper unit, range checks 170 * arguments, and schedules the transfer. Does not wait for the transfer 171 * to complete. Multi-page transfers are supported. All I/O requests must 172 * be a multiple of a sector in length. 173 */ 174static void 175mlxd_strategy(struct buf *bp) 176{ 177 struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_dev->si_drv1; 178 179 debug("called"); 180 181 /* bogus disk? */ 182 if (sc == NULL) { 183 bp->b_error = EINVAL; 184 goto bad; 185 } 186 187 /* XXX may only be temporarily offline - sleep? */ 188 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 189 bp->b_error = ENXIO; 190 goto bad; 191 } 192 193 /* do-nothing operation */ 194 if (bp->b_bcount == 0) 195 goto done; 196 197 devstat_start_transaction(&sc->mlxd_stats); 198 mlx_submit_buf(sc->mlxd_controller, bp); 199 return; 200 201 bad: 202 bp->b_flags |= B_ERROR; 203 204 done: 205 /* 206 * Correctly set the buf to indicate a completed transfer 207 */ 208 bp->b_resid = bp->b_bcount; 209 biodone(bp); 210 return; 211} 212 213void 214mlxd_intr(void *data) 215{ 216 struct buf *bp = (struct buf *)data; 217 struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_dev->si_drv1; 218 219 debug("called"); 220 221 if (bp->b_flags & B_ERROR) 222 bp->b_error = EIO; 223 else 224 bp->b_resid = 0; 225 226 devstat_end_transaction_buf(&sc->mlxd_stats, bp); 227 biodone(bp); 228} 229 230static int 231mlxd_probe(device_t dev) 232{ 233 234 debug("called"); 235 236 device_set_desc(dev, "Mylex System Drive"); 237 return (0); 238} 239 240static int 241mlxd_attach(device_t dev) 242{ 243 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 244 device_t parent; 245 char *state; 246 dev_t dsk; 247 248 debug("called"); 249 250 parent = device_get_parent(dev); 251 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 252 sc->mlxd_unit = device_get_unit(dev); 253 sc->mlxd_drive = device_get_ivars(dev); 254 sc->mlxd_dev = dev; 255 256 switch(sc->mlxd_drive->ms_state) { 257 case MLX_SYSD_ONLINE: 258 state = "online"; 259 break; 260 case MLX_SYSD_CRITICAL: 261 state = "critical"; 262 break; 263 case MLX_SYSD_OFFLINE: 264 state = "offline"; 265 break; 266 default: 267 state = "unknown state"; 268 } 269 270 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 271 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 272 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 273 274 devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 275 DEVSTAT_NO_ORDERED_TAGS, 276 DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_OTHER, 277 DEVSTAT_PRIORITY_DA); 278 279 dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 280 disks_registered++; 281 282 /* set maximum I/O size */ 283 dsk->si_iosize_max = sc->mlxd_controller->mlx_maxiosize * MLX_BLKSIZE; 284 dsk->si_drv1 = sc; 285 286 return (0); 287} 288 289static int 290mlxd_detach(device_t dev) 291{ 292 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 293 294 debug("called"); 295 296 devstat_remove_entry(&sc->mlxd_stats); 297 298 /* hack to handle lack of destroy_disk() */ 299 if (--disks_registered == 0) 300 cdevsw_remove(&mlxddisk_cdevsw); 301 302 return(0); 303} 304 305