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 1.2 2003/06/17 04:28:27 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 54 #include <vm/vm.h> 55 #include <vm/pmap.h> 56 #include <machine/md_var.h> 57 58 #include <dev/ida/idareg.h> 59 #include <dev/ida/idavar.h> 60 61 /* prototypes */ 62 static int idad_probe(device_t dev); 63 static int idad_attach(device_t dev); 64 static int idad_detach(device_t dev); 65 66 static d_open_t idad_open; 67 static d_close_t idad_close; 68 static d_strategy_t idad_strategy; 69 static d_dump_t idad_dump; 70 71 #define IDAD_BDEV_MAJOR 29 72 #define IDAD_CDEV_MAJOR 109 73 74 static struct cdevsw id_cdevsw = { 75 /* open */ idad_open, 76 /* close */ idad_close, 77 /* read */ physread, 78 /* write */ physwrite, 79 /* ioctl */ noioctl, 80 /* poll */ nopoll, 81 /* mmap */ nommap, 82 /* strategy */ idad_strategy, 83 /* name */ "idad", 84 /* maj */ IDAD_CDEV_MAJOR, 85 /* dump */ idad_dump, 86 /* psize */ nopsize, 87 /* flags */ D_DISK, 88 /* bmaj */ IDAD_BDEV_MAJOR 89 }; 90 91 static devclass_t idad_devclass; 92 static struct cdevsw idaddisk_cdevsw; 93 static int disks_registered = 0; 94 95 static device_method_t idad_methods[] = { 96 DEVMETHOD(device_probe, idad_probe), 97 DEVMETHOD(device_attach, idad_attach), 98 DEVMETHOD(device_detach, idad_detach), 99 { 0, 0 } 100 }; 101 102 static driver_t idad_driver = { 103 "idad", 104 idad_methods, 105 sizeof(struct idad_softc) 106 }; 107 108 DRIVER_MODULE(idad, ida, idad_driver, idad_devclass, 0, 0); 109 110 static __inline struct idad_softc * 111 idad_getsoftc(dev_t dev) 112 { 113 114 return ((struct idad_softc *)dev->si_drv1); 115 } 116 117 static int 118 idad_open(dev_t dev, int flags, int fmt, struct proc *p) 119 { 120 struct idad_softc *drv; 121 struct disklabel *label; 122 123 drv = idad_getsoftc(dev); 124 if (drv == NULL) 125 return (ENXIO); 126 127 label = &drv->disk.d_label; 128 bzero(label, sizeof(*label)); 129 label->d_type = DTYPE_SCSI; 130 label->d_secsize = drv->secsize; 131 label->d_nsectors = drv->sectors; 132 label->d_ntracks = drv->heads; 133 label->d_ncylinders = drv->cylinders; 134 label->d_secpercyl = drv->sectors * drv->heads; 135 label->d_secperunit = drv->secperunit; 136 137 return (0); 138 } 139 140 static int 141 idad_close(dev_t dev, int flags, int fmt, struct proc *p) 142 { 143 struct idad_softc *drv; 144 145 drv = idad_getsoftc(dev); 146 if (drv == NULL) 147 return (ENXIO); 148 return (0); 149 } 150 151 /* 152 * Read/write routine for a buffer. Finds the proper unit, range checks 153 * arguments, and schedules the transfer. Does not wait for the transfer 154 * to complete. Multi-page transfers are supported. All I/O requests must 155 * be a multiple of a sector in length. 156 */ 157 static void 158 idad_strategy(struct buf *bp) 159 { 160 struct idad_softc *drv; 161 int s; 162 163 drv = idad_getsoftc(bp->b_dev); 164 if (drv == NULL) { 165 bp->b_error = EINVAL; 166 goto bad; 167 } 168 169 /* 170 * software write protect check 171 */ 172 if (drv->flags & DRV_WRITEPROT && (bp->b_flags & B_READ) == 0) { 173 bp->b_error = EROFS; 174 goto bad; 175 } 176 177 /* 178 * If it's a null transfer, return immediately 179 */ 180 if (bp->b_bcount == 0) 181 goto done; 182 183 bp->b_driver1 = drv; 184 s = splbio(); 185 devstat_start_transaction(&drv->stats); 186 ida_submit_buf(drv->controller, bp); 187 splx(s); 188 return; 189 190 bad: 191 bp->b_flags |= B_ERROR; 192 193 done: 194 /* 195 * Correctly set the buf to indicate a completed transfer 196 */ 197 bp->b_resid = bp->b_bcount; 198 biodone(bp); 199 return; 200 } 201 202 static int 203 idad_dump(dev_t dev) 204 { 205 struct idad_softc *drv; 206 u_int count, blkno, secsize; 207 long blkcnt; 208 int i, error, dumppages; 209 caddr_t va; 210 vm_offset_t addr, a; 211 212 if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize))) 213 return (error); 214 215 drv = idad_getsoftc(dev); 216 if (drv == NULL) 217 return (ENXIO); 218 219 addr = 0; 220 blkcnt = howmany(PAGE_SIZE, secsize); 221 222 while (count > 0) { 223 va = NULL; 224 225 dumppages = imin(count / blkcnt, MAXDUMPPGS); 226 227 for (i = 0; i < dumppages; i++) { 228 a = addr + (i * PAGE_SIZE); 229 if (is_physical_memory(a)) 230 va = pmap_kenter_temporary(trunc_page(a), i); 231 else 232 va = pmap_kenter_temporary(trunc_page(0), i); 233 } 234 235 error = ida_command(drv->controller, CMD_WRITE, va, 236 PAGE_SIZE * dumppages, drv->drive, blkno, DMA_DATA_OUT); 237 if (error) 238 return (error); 239 240 if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0) 241 return (EINTR); 242 243 blkno += blkcnt * dumppages; 244 count -= blkcnt * dumppages; 245 addr += PAGE_SIZE * dumppages; 246 } 247 return (0); 248 } 249 250 void 251 idad_intr(struct buf *bp) 252 { 253 struct idad_softc *drv = (struct idad_softc *)bp->b_driver1; 254 255 if (bp->b_flags & B_ERROR) 256 bp->b_error = EIO; 257 else 258 bp->b_resid = 0; 259 260 devstat_end_transaction_buf(&drv->stats, bp); 261 biodone(bp); 262 } 263 264 static int 265 idad_probe(device_t dev) 266 { 267 268 device_set_desc(dev, "Compaq Logical Drive"); 269 return (0); 270 } 271 272 static int 273 idad_attach(device_t dev) 274 { 275 struct ida_drive_info dinfo; 276 struct idad_softc *drv; 277 device_t parent; 278 dev_t dsk; 279 int error; 280 281 drv = (struct idad_softc *)device_get_softc(dev); 282 parent = device_get_parent(dev); 283 drv->controller = (struct ida_softc *)device_get_softc(parent); 284 drv->unit = device_get_unit(dev); 285 drv->drive = drv->controller->num_drives; 286 drv->controller->num_drives++; 287 288 error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO, 289 &dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN); 290 if (error) { 291 device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n"); 292 return (ENXIO); 293 } 294 295 drv->cylinders = dinfo.ncylinders; 296 drv->heads = dinfo.nheads; 297 drv->sectors = dinfo.nsectors; 298 drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize; 299 drv->secperunit = dinfo.secperunit; 300 301 /* XXX 302 * other initialization 303 */ 304 device_printf(dev, "%uMB (%u sectors), blocksize=%d\n", 305 drv->secperunit / ((1024 * 1024) / drv->secsize), 306 drv->secperunit, drv->secsize); 307 308 devstat_add_entry(&drv->stats, "idad", drv->unit, drv->secsize, 309 DEVSTAT_NO_ORDERED_TAGS, 310 DEVSTAT_TYPE_STORARRAY| DEVSTAT_TYPE_IF_OTHER, 311 DEVSTAT_PRIORITY_ARRAY); 312 313 dsk = disk_create(drv->unit, &drv->disk, 0, 314 &id_cdevsw, &idaddisk_cdevsw); 315 316 dsk->si_drv1 = drv; 317 dsk->si_iosize_max = DFLTPHYS; /* XXX guess? */ 318 disks_registered++; 319 320 return (0); 321 } 322 323 static int 324 idad_detach(device_t dev) 325 { 326 struct idad_softc *drv; 327 328 drv = (struct idad_softc *)device_get_softc(dev); 329 devstat_remove_entry(&drv->stats); 330 331 if (--disks_registered == 0) 332 cdevsw_remove(&idaddisk_cdevsw); 333 return (0); 334 } 335