mlx_disk.c revision 240608
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 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/dev/mlx/mlx_disk.c 240608 2012-09-17 15:27:30Z jhb $"); 31 32/* 33 * Disk driver for Mylex DAC960 RAID adapters. 34 */ 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/kernel.h> 39#include <sys/lock.h> 40#include <sys/module.h> 41#include <sys/sx.h> 42 43#include <sys/bus.h> 44#include <sys/conf.h> 45 46#include <machine/bus.h> 47#include <sys/rman.h> 48 49#include <geom/geom_disk.h> 50 51#include <dev/mlx/mlx_compat.h> 52#include <dev/mlx/mlxio.h> 53#include <dev/mlx/mlxvar.h> 54#include <dev/mlx/mlxreg.h> 55 56/* prototypes */ 57static int mlxd_probe(device_t dev); 58static int mlxd_attach(device_t dev); 59static int mlxd_detach(device_t dev); 60 61devclass_t mlxd_devclass; 62 63static device_method_t mlxd_methods[] = { 64 DEVMETHOD(device_probe, mlxd_probe), 65 DEVMETHOD(device_attach, mlxd_attach), 66 DEVMETHOD(device_detach, mlxd_detach), 67 { 0, 0 } 68}; 69 70static driver_t mlxd_driver = { 71 "mlxd", 72 mlxd_methods, 73 sizeof(struct mlxd_softc) 74}; 75 76DRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 77 78static int 79mlxd_open(struct disk *dp) 80{ 81 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1; 82 83 debug_called(1); 84 85 if (sc == NULL) 86 return (ENXIO); 87 88 /* controller not active? */ 89 MLX_CONFIG_LOCK(sc->mlxd_controller); 90 MLX_IO_LOCK(sc->mlxd_controller); 91 if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) { 92 MLX_IO_UNLOCK(sc->mlxd_controller); 93 MLX_CONFIG_UNLOCK(sc->mlxd_controller); 94 return(ENXIO); 95 } 96 97 sc->mlxd_flags |= MLXD_OPEN; 98 MLX_IO_UNLOCK(sc->mlxd_controller); 99 MLX_CONFIG_UNLOCK(sc->mlxd_controller); 100 return (0); 101} 102 103static int 104mlxd_close(struct disk *dp) 105{ 106 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1; 107 108 debug_called(1); 109 110 if (sc == NULL) 111 return (ENXIO); 112 MLX_CONFIG_LOCK(sc->mlxd_controller); 113 MLX_IO_LOCK(sc->mlxd_controller); 114 sc->mlxd_flags &= ~MLXD_OPEN; 115 MLX_IO_UNLOCK(sc->mlxd_controller); 116 MLX_CONFIG_UNLOCK(sc->mlxd_controller); 117 return (0); 118} 119 120static int 121mlxd_ioctl(struct disk *dp, u_long cmd, void *addr, int flag, struct thread *td) 122{ 123 struct mlxd_softc *sc = (struct mlxd_softc *)dp->d_drv1; 124 int error; 125 126 debug_called(1); 127 128 if (sc == NULL) 129 return (ENXIO); 130 131 if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, td)) != ENOIOCTL) { 132 debug(0, "mlx_submit_ioctl returned %d\n", error); 133 return(error); 134 } 135 return (ENOTTY); 136} 137 138/* 139 * Read/write routine for a buffer. Finds the proper unit, range checks 140 * arguments, and schedules the transfer. Does not wait for the transfer 141 * to complete. Multi-page transfers are supported. All I/O requests must 142 * be a multiple of a sector in length. 143 */ 144static void 145mlxd_strategy(mlx_bio *bp) 146{ 147 struct mlxd_softc *sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp); 148 149 debug_called(1); 150 151 /* bogus disk? */ 152 if (sc == NULL) { 153 MLX_BIO_SET_ERROR(bp, EINVAL); 154 goto bad; 155 } 156 157 /* XXX may only be temporarily offline - sleep? */ 158 MLX_IO_LOCK(sc->mlxd_controller); 159 if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 160 MLX_IO_UNLOCK(sc->mlxd_controller); 161 MLX_BIO_SET_ERROR(bp, ENXIO); 162 goto bad; 163 } 164 165 MLX_BIO_STATS_START(bp); 166 mlx_submit_buf(sc->mlxd_controller, bp); 167 MLX_IO_UNLOCK(sc->mlxd_controller); 168 return; 169 170 bad: 171 /* 172 * Correctly set the bio to indicate a failed tranfer. 173 */ 174 MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp); 175 MLX_BIO_DONE(bp); 176 return; 177} 178 179void 180mlxd_intr(void *data) 181{ 182 mlx_bio *bp = (mlx_bio *)data; 183 184 debug_called(1); 185 186 if (MLX_BIO_HAS_ERROR(bp)) 187 MLX_BIO_SET_ERROR(bp, EIO); 188 else 189 MLX_BIO_RESID(bp) = 0; 190 191 MLX_BIO_STATS_END(bp); 192 MLX_BIO_DONE(bp); 193} 194 195static int 196mlxd_probe(device_t dev) 197{ 198 199 debug_called(1); 200 201 device_set_desc(dev, "Mylex System Drive"); 202 return (0); 203} 204 205static int 206mlxd_attach(device_t dev) 207{ 208 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 209 device_t parent; 210 char *state; 211 int s1, s2; 212 213 debug_called(1); 214 215 parent = device_get_parent(dev); 216 sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 217 sc->mlxd_unit = device_get_unit(dev); 218 sc->mlxd_drive = device_get_ivars(dev); 219 sc->mlxd_dev = dev; 220 221 switch(sc->mlxd_drive->ms_state) { 222 case MLX_SYSD_ONLINE: 223 state = "online"; 224 break; 225 case MLX_SYSD_CRITICAL: 226 state = "critical"; 227 break; 228 case MLX_SYSD_OFFLINE: 229 state = "offline"; 230 break; 231 default: 232 state = "unknown state"; 233 } 234 235 device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 236 sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 237 sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 238 239 sc->mlxd_disk = disk_alloc(); 240 sc->mlxd_disk->d_open = mlxd_open; 241 sc->mlxd_disk->d_close = mlxd_close; 242 sc->mlxd_disk->d_ioctl = mlxd_ioctl; 243 sc->mlxd_disk->d_strategy = mlxd_strategy; 244 sc->mlxd_disk->d_name = "mlxd"; 245 sc->mlxd_disk->d_unit = sc->mlxd_unit; 246 sc->mlxd_disk->d_drv1 = sc; 247 sc->mlxd_disk->d_sectorsize = MLX_BLKSIZE; 248 sc->mlxd_disk->d_mediasize = MLX_BLKSIZE * (off_t)sc->mlxd_drive->ms_size; 249 sc->mlxd_disk->d_fwsectors = sc->mlxd_drive->ms_sectors; 250 sc->mlxd_disk->d_fwheads = sc->mlxd_drive->ms_heads; 251 252 /* 253 * Set maximum I/O size to the lesser of the recommended maximum and the practical 254 * maximum except on v2 cards where the maximum is set to 8 pages. 255 */ 256 if (sc->mlxd_controller->mlx_iftype == MLX_IFTYPE_2) 257 sc->mlxd_disk->d_maxsize = 8 * MLX_PAGE_SIZE; 258 else { 259 s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 260 s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * MLX_PAGE_SIZE; 261 sc->mlxd_disk->d_maxsize = imin(s1, s2); 262 } 263 264 disk_create(sc->mlxd_disk, DISK_VERSION); 265 266 return (0); 267} 268 269static int 270mlxd_detach(device_t dev) 271{ 272 struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 273 274 debug_called(1); 275 276 disk_destroy(sc->mlxd_disk); 277 278 return(0); 279} 280 281