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 struct disk_info info; 111 112 drv = idad_getsoftc(dev); 113 if (drv == NULL) 114 return (ENXIO); 115 116 bzero(&info, sizeof(info)); 117 info.d_media_blksize = drv->secsize; /* mandatory */ 118 info.d_media_blocks = drv->secperunit; 119 120 info.d_secpertrack = drv->sectors; /* optional */ 121 info.d_type = DTYPE_SCSI; 122 info.d_nheads = drv->heads; 123 info.d_ncylinders = drv->cylinders; 124 info.d_secpercyl = drv->sectors * drv->heads; 125 126 disk_setdiskinfo(&drv->disk, &info); 127 128 return (0); 129 } 130 131 static int 132 idad_close(struct dev_close_args *ap) 133 { 134 cdev_t dev = ap->a_head.a_dev; 135 struct idad_softc *drv; 136 137 drv = idad_getsoftc(dev); 138 if (drv == NULL) 139 return (ENXIO); 140 return (0); 141 } 142 143 /* 144 * Read/write routine for a buffer. Finds the proper unit, range checks 145 * arguments, and schedules the transfer. Does not wait for the transfer 146 * to complete. Multi-page transfers are supported. All I/O requests must 147 * be a multiple of a sector in length. 148 */ 149 static int 150 idad_strategy(struct dev_strategy_args *ap) 151 { 152 cdev_t dev = ap->a_head.a_dev; 153 struct bio *bio = ap->a_bio; 154 struct buf *bp = bio->bio_buf; 155 struct idad_softc *drv; 156 157 drv = idad_getsoftc(dev); 158 if (drv == NULL) { 159 bp->b_error = EINVAL; 160 goto bad; 161 } 162 163 /* 164 * software write protect check 165 */ 166 if ((drv->flags & DRV_WRITEPROT) && bp->b_cmd != BUF_CMD_READ) { 167 bp->b_error = EROFS; 168 goto bad; 169 } 170 171 /* 172 * If it's a null transfer, return immediately 173 */ 174 if (bp->b_bcount == 0) 175 goto done; 176 177 bio->bio_driver_info = drv; 178 crit_enter(); 179 devstat_start_transaction(&drv->stats); 180 ida_submit_buf(drv->controller, bio); 181 crit_exit(); 182 return(0); 183 184 bad: 185 bp->b_flags |= B_ERROR; 186 187 done: 188 /* 189 * Correctly set the buf to indicate a completed transfer 190 */ 191 bp->b_resid = bp->b_bcount; 192 biodone(bio); 193 return(0); 194 } 195 196 static int 197 idad_dump(struct dev_dump_args *ap) 198 { 199 cdev_t dev = ap->a_head.a_dev; 200 struct idad_softc *drv; 201 long blkcnt; 202 int i, error, dumppages; 203 caddr_t va; 204 vm_offset_t addr, a; 205 206 drv = idad_getsoftc(dev); 207 if (drv == NULL) 208 return (ENXIO); 209 210 addr = 0; 211 blkcnt = howmany(PAGE_SIZE, ap->a_secsize); 212 213 while (ap->a_count > 0) { 214 va = NULL; 215 216 dumppages = imin(ap->a_count / blkcnt, MAXDUMPPGS); 217 218 for (i = 0; i < dumppages; i++) { 219 a = addr + (i * PAGE_SIZE); 220 if (is_physical_memory(a)) 221 va = pmap_kenter_temporary(trunc_page(a), i); 222 else 223 va = pmap_kenter_temporary(trunc_page(0), i); 224 } 225 226 error = ida_command(drv->controller, CMD_WRITE, va, 227 PAGE_SIZE * dumppages, drv->drive, ap->a_blkno, DMA_DATA_OUT); 228 if (error) 229 return (error); 230 231 if (dumpstatus(addr, (off_t)ap->a_count * DEV_BSIZE) < 0) 232 return (EINTR); 233 234 ap->a_blkno += blkcnt * dumppages; 235 ap->a_count -= blkcnt * dumppages; 236 addr += PAGE_SIZE * dumppages; 237 } 238 return (0); 239 } 240 241 void 242 idad_intr(struct bio *bio) 243 { 244 struct idad_softc *drv = (struct idad_softc *)bio->bio_driver_info; 245 struct buf *bp = bio->bio_buf; 246 247 if (bp->b_flags & B_ERROR) 248 bp->b_error = EIO; 249 else 250 bp->b_resid = 0; 251 252 devstat_end_transaction_buf(&drv->stats, bp); 253 biodone(bio); 254 } 255 256 static int 257 idad_probe(device_t dev) 258 { 259 260 device_set_desc(dev, "Compaq Logical Drive"); 261 return (0); 262 } 263 264 static int 265 idad_attach(device_t dev) 266 { 267 struct ida_drive_info dinfo; 268 struct idad_softc *drv; 269 device_t parent; 270 cdev_t dsk; 271 int error; 272 273 drv = (struct idad_softc *)device_get_softc(dev); 274 parent = device_get_parent(dev); 275 drv->controller = (struct ida_softc *)device_get_softc(parent); 276 drv->unit = device_get_unit(dev); 277 drv->drive = drv->controller->num_drives; 278 drv->controller->num_drives++; 279 280 error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO, 281 &dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN); 282 if (error) { 283 device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n"); 284 return (ENXIO); 285 } 286 287 drv->cylinders = dinfo.ncylinders; 288 drv->heads = dinfo.nheads; 289 drv->sectors = dinfo.nsectors; 290 drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize; 291 drv->secperunit = dinfo.secperunit; 292 293 /* XXX 294 * other initialization 295 */ 296 device_printf(dev, "%uMB (%u sectors), blocksize=%d\n", 297 drv->secperunit / ((1024 * 1024) / drv->secsize), 298 drv->secperunit, drv->secsize); 299 300 devstat_add_entry(&drv->stats, "idad", drv->unit, drv->secsize, 301 DEVSTAT_NO_ORDERED_TAGS, 302 DEVSTAT_TYPE_STORARRAY| DEVSTAT_TYPE_IF_OTHER, 303 DEVSTAT_PRIORITY_ARRAY); 304 305 dsk = disk_create(drv->unit, &drv->disk, &id_ops); 306 307 dsk->si_drv1 = drv; 308 dsk->si_iosize_max = DFLTPHYS; /* XXX guess? */ 309 310 return (0); 311 } 312 313 static int 314 idad_detach(device_t dev) 315 { 316 struct idad_softc *drv; 317 318 drv = (struct idad_softc *)device_get_softc(dev); 319 devstat_remove_entry(&drv->stats); 320 disk_destroy(&drv->disk); 321 return (0); 322 } 323