1 /*- 2 * Copyright (c) 1999,2000 Jonathan Lemon 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/dev/ida/ida_disk.c,v 1.12.2.6 2001/11/27 20:21:02 ps Exp $ 27 * $DragonFly: src/sys/dev/raid/ida/ida_disk.c,v 1.16 2007/06/17 23:50:16 dillon Exp $ 28 */ 29 30 /* 31 * Disk driver for Compaq SMART RAID adapters. 32 */ 33 34 #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/cons.h> 43 #include <sys/devicestat.h> 44 #include <sys/disk.h> 45 #include <sys/dtype.h> 46 #include <sys/rman.h> 47 #include <sys/thread2.h> 48 49 #include <machine/clock.h> 50 #include <machine/md_var.h> 51 52 #include <vm/vm.h> 53 #include <vm/pmap.h> 54 55 #include "idareg.h" 56 #include "idavar.h" 57 58 /* prototypes */ 59 static int idad_probe(device_t dev); 60 static int idad_attach(device_t dev); 61 static int idad_detach(device_t dev); 62 63 static d_open_t idad_open; 64 static d_close_t idad_close; 65 static d_strategy_t idad_strategy; 66 static d_dump_t idad_dump; 67 68 #define IDAD_BDEV_MAJOR 29 69 #define IDAD_CDEV_MAJOR 109 70 71 static struct dev_ops id_ops = { 72 { "idad", IDAD_CDEV_MAJOR, D_DISK }, 73 .d_open = idad_open, 74 .d_close = idad_close, 75 .d_read = physread, 76 .d_write = physwrite, 77 .d_strategy = idad_strategy, 78 .d_dump = idad_dump, 79 }; 80 81 static devclass_t idad_devclass; 82 83 static device_method_t idad_methods[] = { 84 DEVMETHOD(device_probe, idad_probe), 85 DEVMETHOD(device_attach, idad_attach), 86 DEVMETHOD(device_detach, idad_detach), 87 { 0, 0 } 88 }; 89 90 static driver_t idad_driver = { 91 "idad", 92 idad_methods, 93 sizeof(struct idad_softc) 94 }; 95 96 DRIVER_MODULE(idad, ida, idad_driver, idad_devclass, 0, 0); 97 98 static __inline struct idad_softc * 99 idad_getsoftc(cdev_t dev) 100 { 101 102 return ((struct idad_softc *)dev->si_drv1); 103 } 104 105 static int 106 idad_open(struct dev_open_args *ap) 107 { 108 cdev_t dev = ap->a_head.a_dev; 109 struct idad_softc *drv; 110 111 drv = idad_getsoftc(dev); 112 if (drv == NULL) 113 return (ENXIO); 114 #if 0 115 bzero(&info, sizeof(info)); 116 info.d_media_blksize = drv->secsize; /* mandatory */ 117 info.d_media_blocks = drv->secperunit; 118 119 info.d_secpertrack = drv->sectors; /* optional */ 120 info.d_type = DTYPE_SCSI; 121 info.d_nheads = drv->heads; 122 info.d_ncylinders = drv->cylinders; 123 info.d_secpercyl = drv->sectors * drv->heads; 124 125 disk_setdiskinfo(&drv->disk, &info); 126 #endif 127 return (0); 128 } 129 130 static int 131 idad_close(struct dev_close_args *ap) 132 { 133 cdev_t dev = ap->a_head.a_dev; 134 struct idad_softc *drv; 135 136 drv = idad_getsoftc(dev); 137 if (drv == NULL) 138 return (ENXIO); 139 return (0); 140 } 141 142 /* 143 * Read/write routine for a buffer. Finds the proper unit, range checks 144 * arguments, and schedules the transfer. Does not wait for the transfer 145 * to complete. Multi-page transfers are supported. All I/O requests must 146 * be a multiple of a sector in length. 147 */ 148 static int 149 idad_strategy(struct dev_strategy_args *ap) 150 { 151 cdev_t dev = ap->a_head.a_dev; 152 struct bio *bio = ap->a_bio; 153 struct buf *bp = bio->bio_buf; 154 struct idad_softc *drv; 155 156 drv = idad_getsoftc(dev); 157 if (drv == NULL) { 158 bp->b_error = EINVAL; 159 goto bad; 160 } 161 162 /* 163 * software write protect check 164 */ 165 if ((drv->flags & DRV_WRITEPROT) && bp->b_cmd != BUF_CMD_READ) { 166 bp->b_error = EROFS; 167 goto bad; 168 } 169 170 /* 171 * If it's a null transfer, return immediately 172 */ 173 if (bp->b_bcount == 0) 174 goto done; 175 176 bio->bio_driver_info = drv; 177 crit_enter(); 178 devstat_start_transaction(&drv->stats); 179 ida_submit_buf(drv->controller, bio); 180 crit_exit(); 181 return(0); 182 183 bad: 184 bp->b_flags |= B_ERROR; 185 186 done: 187 /* 188 * Correctly set the buf to indicate a completed transfer 189 */ 190 bp->b_resid = bp->b_bcount; 191 biodone(bio); 192 return(0); 193 } 194 195 static int 196 idad_dump(struct dev_dump_args *ap) 197 { 198 cdev_t dev = ap->a_head.a_dev; 199 struct idad_softc *drv; 200 int error = 0; 201 202 drv = idad_getsoftc(dev); 203 if (drv == NULL) 204 return (ENXIO); 205 206 drv->controller->flags &= ~IDA_INTERRUPTS; 207 208 if (ap->a_length > 0) { 209 error = ida_command(drv->controller, CMD_WRITE, ap->a_virtual, 210 ap->a_length, drv->drive, ap->a_offset / DEV_BSIZE, DMA_DATA_OUT); 211 } 212 drv->controller->flags |= IDA_INTERRUPTS; 213 return (error); 214 215 } 216 217 void 218 idad_intr(struct bio *bio) 219 { 220 struct idad_softc *drv = (struct idad_softc *)bio->bio_driver_info; 221 struct buf *bp = bio->bio_buf; 222 223 if (bp->b_flags & B_ERROR) 224 bp->b_error = EIO; 225 else 226 bp->b_resid = 0; 227 228 devstat_end_transaction_buf(&drv->stats, bp); 229 biodone(bio); 230 } 231 232 static int 233 idad_probe(device_t dev) 234 { 235 236 device_set_desc(dev, "Compaq Logical Drive"); 237 return (0); 238 } 239 240 static int 241 idad_attach(device_t dev) 242 { 243 struct ida_drive_info dinfo; 244 struct disk_info info; 245 struct idad_softc *drv; 246 device_t parent; 247 cdev_t dsk; 248 int error; 249 250 drv = (struct idad_softc *)device_get_softc(dev); 251 parent = device_get_parent(dev); 252 drv->controller = (struct ida_softc *)device_get_softc(parent); 253 drv->unit = device_get_unit(dev); 254 drv->drive = drv->controller->num_drives; 255 drv->controller->num_drives++; 256 257 error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO, 258 &dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN); 259 if (error) { 260 device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n"); 261 return (ENXIO); 262 } 263 264 drv->cylinders = dinfo.ncylinders; 265 drv->heads = dinfo.nheads; 266 drv->sectors = dinfo.nsectors; 267 drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize; 268 drv->secperunit = dinfo.secperunit; 269 270 /* XXX 271 * other initialization 272 */ 273 device_printf(dev, "%uMB (%u sectors), blocksize=%d\n", 274 drv->secperunit / ((1024 * 1024) / drv->secsize), 275 drv->secperunit, drv->secsize); 276 277 devstat_add_entry(&drv->stats, "idad", drv->unit, drv->secsize, 278 DEVSTAT_NO_ORDERED_TAGS, 279 DEVSTAT_TYPE_STORARRAY| DEVSTAT_TYPE_IF_OTHER, 280 DEVSTAT_PRIORITY_ARRAY); 281 282 dsk = disk_create(drv->unit, &drv->disk, &id_ops); 283 284 dsk->si_drv1 = drv; 285 dsk->si_iosize_max = DFLTPHYS; /* XXX guess? */ 286 287 /* 288 * Set disk info, as it appears that all needed data is available already. 289 * Setting the disk info will also cause the probing to start. 290 */ 291 bzero(&info, sizeof(info)); 292 info.d_media_blksize = drv->secsize; /* mandatory */ 293 info.d_media_blocks = drv->secperunit; 294 295 info.d_secpertrack = drv->sectors; /* optional */ 296 info.d_type = DTYPE_SCSI; 297 info.d_nheads = drv->heads; 298 info.d_ncylinders = drv->cylinders; 299 info.d_secpercyl = drv->sectors * drv->heads; 300 301 disk_setdiskinfo(&drv->disk, &info); 302 303 return (0); 304 } 305 306 static int 307 idad_detach(device_t dev) 308 { 309 struct idad_softc *drv; 310 311 drv = (struct idad_softc *)device_get_softc(dev); 312 devstat_remove_entry(&drv->stats); 313 disk_destroy(&drv->disk); 314 return (0); 315 } 316