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 1.10 2006/02/17 19:18:05 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 46 #if NPCI > 0 47 #include <machine/bus_memio.h> 48 #endif 49 #include <machine/bus_pio.h> 50 #include <machine/bus.h> 51 #include <machine/clock.h> 52 #include <sys/rman.h> 53 #include <sys/thread2.h> 54 55 #include <vm/vm.h> 56 #include <vm/pmap.h> 57 #include <machine/md_var.h> 58 59 #include "idareg.h" 60 #include "idavar.h" 61 62 /* prototypes */ 63 static int idad_probe(device_t dev); 64 static int idad_attach(device_t dev); 65 static int idad_detach(device_t dev); 66 67 static d_open_t idad_open; 68 static d_close_t idad_close; 69 static d_strategy_t idad_strategy; 70 static d_dump_t idad_dump; 71 72 #define IDAD_BDEV_MAJOR 29 73 #define IDAD_CDEV_MAJOR 109 74 75 static struct cdevsw id_cdevsw = { 76 /* name */ "idad", 77 /* maj */ IDAD_CDEV_MAJOR, 78 /* flags */ D_DISK, 79 /* port */ NULL, 80 /* clone */ NULL, 81 82 /* open */ idad_open, 83 /* close */ idad_close, 84 /* read */ physread, 85 /* write */ physwrite, 86 /* ioctl */ noioctl, 87 /* poll */ nopoll, 88 /* mmap */ nommap, 89 /* strategy */ idad_strategy, 90 /* dump */ idad_dump, 91 /* psize */ nopsize 92 }; 93 94 static devclass_t idad_devclass; 95 96 static device_method_t idad_methods[] = { 97 DEVMETHOD(device_probe, idad_probe), 98 DEVMETHOD(device_attach, idad_attach), 99 DEVMETHOD(device_detach, idad_detach), 100 { 0, 0 } 101 }; 102 103 static driver_t idad_driver = { 104 "idad", 105 idad_methods, 106 sizeof(struct idad_softc) 107 }; 108 109 DRIVER_MODULE(idad, ida, idad_driver, idad_devclass, 0, 0); 110 111 static __inline struct idad_softc * 112 idad_getsoftc(dev_t dev) 113 { 114 115 return ((struct idad_softc *)dev->si_drv1); 116 } 117 118 static int 119 idad_open(dev_t dev, int flags, int fmt, d_thread_t *td) 120 { 121 struct idad_softc *drv; 122 struct disklabel *label; 123 124 drv = idad_getsoftc(dev); 125 if (drv == NULL) 126 return (ENXIO); 127 128 label = &drv->disk.d_label; 129 bzero(label, sizeof(*label)); 130 label->d_type = DTYPE_SCSI; 131 label->d_secsize = drv->secsize; 132 label->d_nsectors = drv->sectors; 133 label->d_ntracks = drv->heads; 134 label->d_ncylinders = drv->cylinders; 135 label->d_secpercyl = drv->sectors * drv->heads; 136 label->d_secperunit = drv->secperunit; 137 138 return (0); 139 } 140 141 static int 142 idad_close(dev_t dev, int flags, int fmt, d_thread_t *td) 143 { 144 struct idad_softc *drv; 145 146 drv = idad_getsoftc(dev); 147 if (drv == NULL) 148 return (ENXIO); 149 return (0); 150 } 151 152 /* 153 * Read/write routine for a buffer. Finds the proper unit, range checks 154 * arguments, and schedules the transfer. Does not wait for the transfer 155 * to complete. Multi-page transfers are supported. All I/O requests must 156 * be a multiple of a sector in length. 157 */ 158 static void 159 idad_strategy(dev_t dev, struct bio *bio) 160 { 161 struct buf *bp = bio->bio_buf; 162 struct idad_softc *drv; 163 164 drv = idad_getsoftc(dev); 165 if (drv == NULL) { 166 bp->b_error = EINVAL; 167 goto bad; 168 } 169 170 /* 171 * software write protect check 172 */ 173 if (drv->flags & DRV_WRITEPROT && (bp->b_flags & B_READ) == 0) { 174 bp->b_error = EROFS; 175 goto bad; 176 } 177 178 /* 179 * If it's a null transfer, return immediately 180 */ 181 if (bp->b_bcount == 0) 182 goto done; 183 184 bio->bio_driver_info = drv; 185 crit_enter(); 186 devstat_start_transaction(&drv->stats); 187 ida_submit_buf(drv->controller, bio); 188 crit_exit(); 189 return; 190 191 bad: 192 bp->b_flags |= B_ERROR; 193 194 done: 195 /* 196 * Correctly set the buf to indicate a completed transfer 197 */ 198 bp->b_resid = bp->b_bcount; 199 biodone(bio); 200 } 201 202 static int 203 idad_dump(dev_t dev, u_int count, u_int blkno, u_int secsize) 204 { 205 struct idad_softc *drv; 206 long blkcnt; 207 int i, error, dumppages; 208 caddr_t va; 209 vm_offset_t addr, a; 210 211 drv = idad_getsoftc(dev); 212 if (drv == NULL) 213 return (ENXIO); 214 215 addr = 0; 216 blkcnt = howmany(PAGE_SIZE, secsize); 217 218 while (count > 0) { 219 va = NULL; 220 221 dumppages = imin(count / blkcnt, MAXDUMPPGS); 222 223 for (i = 0; i < dumppages; i++) { 224 a = addr + (i * PAGE_SIZE); 225 if (is_physical_memory(a)) 226 va = pmap_kenter_temporary(trunc_page(a), i); 227 else 228 va = pmap_kenter_temporary(trunc_page(0), i); 229 } 230 231 error = ida_command(drv->controller, CMD_WRITE, va, 232 PAGE_SIZE * dumppages, drv->drive, blkno, DMA_DATA_OUT); 233 if (error) 234 return (error); 235 236 if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0) 237 return (EINTR); 238 239 blkno += blkcnt * dumppages; 240 count -= blkcnt * dumppages; 241 addr += PAGE_SIZE * dumppages; 242 } 243 return (0); 244 } 245 246 void 247 idad_intr(struct bio *bio) 248 { 249 struct idad_softc *drv = (struct idad_softc *)bio->bio_driver_info; 250 struct buf *bp = bio->bio_buf; 251 252 if (bp->b_flags & B_ERROR) 253 bp->b_error = EIO; 254 else 255 bp->b_resid = 0; 256 257 devstat_end_transaction_buf(&drv->stats, bp); 258 biodone(bio); 259 } 260 261 static int 262 idad_probe(device_t dev) 263 { 264 265 device_set_desc(dev, "Compaq Logical Drive"); 266 return (0); 267 } 268 269 static int 270 idad_attach(device_t dev) 271 { 272 struct ida_drive_info dinfo; 273 struct idad_softc *drv; 274 device_t parent; 275 dev_t dsk; 276 int error; 277 278 drv = (struct idad_softc *)device_get_softc(dev); 279 parent = device_get_parent(dev); 280 drv->controller = (struct ida_softc *)device_get_softc(parent); 281 drv->unit = device_get_unit(dev); 282 drv->drive = drv->controller->num_drives; 283 drv->controller->num_drives++; 284 285 error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO, 286 &dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN); 287 if (error) { 288 device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n"); 289 return (ENXIO); 290 } 291 292 drv->cylinders = dinfo.ncylinders; 293 drv->heads = dinfo.nheads; 294 drv->sectors = dinfo.nsectors; 295 drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize; 296 drv->secperunit = dinfo.secperunit; 297 298 /* XXX 299 * other initialization 300 */ 301 device_printf(dev, "%uMB (%u sectors), blocksize=%d\n", 302 drv->secperunit / ((1024 * 1024) / drv->secsize), 303 drv->secperunit, drv->secsize); 304 305 devstat_add_entry(&drv->stats, "idad", drv->unit, drv->secsize, 306 DEVSTAT_NO_ORDERED_TAGS, 307 DEVSTAT_TYPE_STORARRAY| DEVSTAT_TYPE_IF_OTHER, 308 DEVSTAT_PRIORITY_ARRAY); 309 310 dsk = disk_create(drv->unit, &drv->disk, 0, &id_cdevsw); 311 312 dsk->si_drv1 = drv; 313 dsk->si_iosize_max = DFLTPHYS; /* XXX guess? */ 314 315 return (0); 316 } 317 318 static int 319 idad_detach(device_t dev) 320 { 321 struct idad_softc *drv; 322 323 drv = (struct idad_softc *)device_get_softc(dev); 324 devstat_remove_entry(&drv->stats); 325 disk_destroy(&drv->disk); 326 return (0); 327 } 328