sys/dev/raid/ips/ips_disk.c

   1 /*-
   2  * Written by: David Jeffery
   3  * Copyright (c) 2002 Adaptec Inc.
   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  * $FreeBSD: src/sys/dev/ips/ips_disk.c,v 1.4 2003/09/22 04:59:07 njl Exp $
  28  * $DragonFly: src/sys/dev/raid/ips/ips_disk.c,v 1.14 2008/06/10 17:20:52 dillon Exp $
  29  */
  30
  31 #include <sys/devicestat.h>
  32 #include <dev/raid/ips/ips.h>
  33 #include <dev/raid/ips/ips_disk.h>
  34 #include <sys/stat.h>
  35 #include <sys/dtype.h>
  36
  37 #include <vm/vm.h>
  38 #include <vm/pmap.h>
  39 #include <machine/md_var.h>
  40
  41 static int ipsd_probe(device_t dev);
  42 static int ipsd_attach(device_t dev);
  43 static int ipsd_detach(device_t dev);
  44
  45 #if 0
  46 static int ipsd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length);
  47 static void ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs,
  48                              int error);
  49 static void ipsd_dump_block_complete(ips_command_t *command);
  50 #endif
  51
  52 static d_open_t ipsd_open;
  53 static d_close_t ipsd_close;
  54 static d_strategy_t ipsd_strategy;
  55 static d_dump_t ipsd_dump_helper;
  56
  57 static struct dev_ops ipsd_ops = {
  58         { "ipsd", IPSD_CDEV_MAJOR, D_DISK },
  59         .d_open =       ipsd_open,
  60         .d_close =      ipsd_close,
  61         .d_strategy =   ipsd_strategy,
  62         .d_read =       physread,
  63         .d_write =      physwrite,
  64         .d_dump =       ipsd_dump_helper,
  65 };
  66
  67 static device_method_t ipsd_methods[] = {
  68         DEVMETHOD(device_probe,         ipsd_probe),
  69         DEVMETHOD(device_attach,        ipsd_attach),
  70         DEVMETHOD(device_detach,        ipsd_detach),
  71         { 0, 0 }
  72 };
  73
  74
  75 static driver_t ipsd_driver = {
  76         "ipsd",
  77         ipsd_methods,
  78         sizeof(ipsdisk_softc_t)
  79 };
  80
  81 static devclass_t ipsd_devclass;
  82 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
  83
  84 /*
  85  * handle opening of disk device.  It must set up all information about
  86  * the geometry and size of the disk
  87  */
  88 static int
  89 ipsd_open(struct dev_open_args *ap)
  90 {
  91         cdev_t dev = ap->a_head.a_dev;
  92         ipsdisk_softc_t *dsc = dev->si_drv1;
  93
  94         if (dsc == NULL)
  95                 return (ENXIO);
  96         dsc->state |= IPS_DEV_OPEN;
  97         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
  98         return 0;
  99 }
 100
 101 static int
 102 ipsd_close(struct dev_close_args *ap)
 103 {
 104         cdev_t dev = ap->a_head.a_dev;
 105         ipsdisk_softc_t *dsc = dev->si_drv1;
 106
 107         dsc->state &= ~IPS_DEV_OPEN;
 108         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
 109         return 0;
 110 }
 111
 112 /* ipsd_finish is called to clean up and return a completed IO request */
 113 void
 114 ipsd_finish(struct bio *bio)
 115 {
 116         struct buf *bp = bio->bio_buf;
 117         ipsdisk_softc_t *dsc;
 118
 119         dsc = bio->bio_driver_info;
 120         if (bp->b_flags & B_ERROR) {
 121                 device_printf(dsc->dev, "iobuf error %d\n", bp->b_error);
 122         } else {
 123                 bp->b_resid = 0;
 124         }
 125         devstat_end_transaction_buf(&dsc->stats, bp);
 126         biodone(bio);
 127         ips_start_io_request(dsc->sc);
 128 }
 129
 130
 131 static int
 132 ipsd_strategy(struct dev_strategy_args *ap)
 133 {
 134         cdev_t dev = ap->a_head.a_dev;
 135         struct bio *bio = ap->a_bio;
 136         ipsdisk_softc_t *dsc;
 137
 138         dsc = dev->si_drv1;
 139         DEVICE_PRINTF(8, dsc->dev, "in strategy\n");
 140         bio->bio_driver_info = dsc;
 141         devstat_start_transaction(&dsc->stats);
 142         lockmgr(&dsc->sc->queue_lock, LK_EXCLUSIVE|LK_RETRY);
 143         bioqdisksort(&dsc->sc->bio_queue, bio);
 144         ips_start_io_request(dsc->sc);
 145         lockmgr(&dsc->sc->queue_lock, LK_RELEASE);
 146         return(0);
 147 }
 148
 149 static int
 150 ipsd_probe(device_t dev)
 151 {
 152         DEVICE_PRINTF(2, dev, "in probe\n");
 153         device_set_desc(dev, "Logical Drive");
 154         return 0;
 155 }
 156
 157 static int
 158 ipsd_attach(device_t dev)
 159 {
 160         device_t adapter;
 161         ipsdisk_softc_t *dsc;
 162         struct disk_info info;
 163         u_int totalsectors;
 164         u_int nheads, nsectors;
 165
 166         DEVICE_PRINTF(2, dev, "in attach\n");
 167         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 168         bzero(dsc, sizeof(ipsdisk_softc_t));
 169         adapter = device_get_parent(dev);
 170         dsc->dev = dev;
 171         dsc->sc = device_get_softc(adapter);
 172         dsc->unit = device_get_unit(dev);
 173         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
 174         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
 175         if ((totalsectors > 0x400000) &&
 176             ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
 177                 nheads = IPS_NORM_HEADS;
 178                 nsectors = IPS_NORM_SECTORS;
 179         } else {
 180                 nheads = IPS_COMP_HEADS;
 181                 nsectors = IPS_COMP_SECTORS;
 182         }
 183         devstat_add_entry(&dsc->stats, "ipsd", dsc->unit, DEV_BSIZE,
 184                           DEVSTAT_NO_ORDERED_TAGS,
 185                           DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_SCSI,
 186                           DEVSTAT_PRIORITY_DISK);
 187         dsc->ipsd_dev_t = disk_create(dsc->unit, &dsc->ipsd_disk, &ipsd_ops);
 188         dsc->ipsd_dev_t->si_drv1 = dsc;
 189         dsc->ipsd_dev_t->si_iosize_max = IPS_MAX_IO_SIZE;
 190
 191         bzero(&info, sizeof(info));
 192         info.d_media_blksize    = IPS_BLKSIZE;          /* mandatory */
 193         info.d_media_blocks     = totalsectors;
 194
 195         info.d_type             = DTYPE_ESDI;           /* optional */
 196         info.d_nheads           = nheads;
 197         info.d_secpertrack      = nsectors;
 198         info.d_ncylinders       = totalsectors / nheads / nsectors;
 199         info.d_secpercyl        = nsectors / nheads;
 200
 201         disk_setdiskinfo(&dsc->ipsd_disk, &info);
 202
 203         device_printf(dev, "Logical Drive  (%dMB)\n",
 204             dsc->sc->drives[dsc->disk_number].sector_count >> 11);
 205         return 0;
 206 }
 207
 208 static int
 209 ipsd_detach(device_t dev)
 210 {
 211         ipsdisk_softc_t *dsc;
 212
 213         DEVICE_PRINTF(2, dev, "in detach\n");
 214         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
 215         if (dsc->state & IPS_DEV_OPEN)
 216                 return (EBUSY);
 217         devstat_remove_entry(&dsc->stats);
 218         disk_destroy(&dsc->ipsd_disk);
 219         return 0;
 220 }
 221
 222 static int
 223 ipsd_dump_helper(struct dev_dump_args *ap)
 224 {
 225         kprintf("dump support for IPS not yet working, will not dump\n");
 226         return (ENODEV);
 227
 228 #if 0
 229         long blkcnt;
 230         caddr_t va;
 231         vm_offset_t addr, a;
 232         int dumppages = MAXDUMPPGS;
 233         int i;
 234
 235         addr = 0;
 236         blkcnt = howmany(PAGE_SIZE, secsize);
 237         while (count > 0) {
 238                 va = NULL;
 239                 if (count / blkcnt < dumppages)
 240                         dumppages = count / blkcnt;
 241                 for (i = 0; i < dumppages; i++) {
 242                         a = addr + (i * PAGE_SIZE);
 243                         if (!is_physical_memory(a))
 244                                 a = 0;
 245                         va = pmap_kenter_temporary(trunc_page(a), i);
 246                 }
 247
 248                 ipsd_dump(dev, va, 0, blkno, PAGE_SIZE * dumppages);
 249                 if (dumpstatus(addr, (off_t)count * DEV_BSIZE) < 0)
 250                         return (EINTR);
 251                 blkno += blkcnt * dumppages;
 252                 count -= blkcnt * dumppages;
 253                 addr += PAGE_SIZE * dumppages;
 254         }
 255         return (0);
 256 #endif
 257 }
 258
 259 #if 0
 260
 261 static int
 262 ipsd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset,
 263           size_t length)
 264 {
 265         cdev_t dev = arg;
 266         ips_softc_t *sc;
 267         ips_command_t *command;
 268         ips_io_cmd *command_struct;
 269         ipsdisk_softc_t *dsc;
 270         off_t off;
 271         uint8_t *va;
 272         int len;
 273         int error = 0;
 274
 275         dsc = dev->si_drv1;
 276         if (dsc == NULL)
 277                 return (EINVAL);
 278         sc = dsc->sc;
 279
 280         if (ips_get_free_cmd(sc, &command, 0) != 0) {
 281                 kprintf("ipsd: failed to get cmd for dump\n");
 282                 return (ENOMEM);
 283         }
 284
 285         command->data_dmatag = sc->sg_dmatag;
 286         command->callback = ipsd_dump_block_complete;
 287
 288         command_struct = (ips_io_cmd *)command->command_buffer;
 289         command_struct->id = command->id;
 290         command_struct->drivenum = sc->drives[dsc->disk_number].drivenum;
 291
 292         off = offset;
 293         va = virtual;
 294
 295         while (length > 0) {
 296                 len = length > IPS_MAX_IO_SIZE ? IPS_MAX_IO_SIZE : length;
 297                 command_struct->lba = off / IPS_BLKSIZE;
 298                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
 299                     va, len, ipsd_dump_map_sg, command, 0) != 0) {
 300                         error = EIO;
 301                         break;
 302                 }
 303                 if (COMMAND_ERROR(&command->status)) {
 304                         error = EIO;
 305                         break;
 306                 }
 307
 308                 length -= len;
 309                 off += len;
 310                 va += len;
 311         }
 312         ips_insert_free_cmd(command->sc, command);
 313         return(error);
 314 }
 315
 316 static void
 317 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
 318 {
 319         ips_softc_t *sc;
 320         ips_command_t *command;
 321         ips_sg_element_t *sg_list;
 322         ips_io_cmd *command_struct;
 323         int i, length;
 324
 325         command = (ips_command_t *)arg;
 326         sc = command->sc;
 327         length = 0;
 328
 329         if (error) {
 330                 kprintf("ipsd_dump_map_sg: error %d\n", error);
 331                 command->status.value = IPS_ERROR_STATUS;
 332                 return;
 333         }
 334
 335         command_struct = (ips_io_cmd *)command->command_buffer;
 336
 337         if (nsegs != 1) {
 338                 command_struct->segnum = nsegs;
 339                 sg_list = (ips_sg_element_t *)((uint8_t *)
 340                     command->command_buffer + IPS_COMMAND_LEN);
 341                 for (i = 0; i < nsegs; i++) {
 342                         sg_list[i].addr = segs[i].ds_addr;
 343                         sg_list[i].len = segs[i].ds_len;
 344                         length += segs[i].ds_len;
 345                 }
 346                 command_struct->buffaddr =
 347                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
 348                 command_struct->command = IPS_SG_WRITE_CMD;
 349         } else {
 350                 command_struct->buffaddr = segs[0].ds_addr;
 351                 length = segs[0].ds_len;
 352                 command_struct->segnum = 0;
 353                 command_struct->command = IPS_WRITE_CMD;
 354         }
 355
 356         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
 357         command_struct->length = length;
 358         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
 359             BUS_DMASYNC_PREWRITE);
 360         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
 361             BUS_DMASYNC_PREWRITE);
 362
 363         sc->ips_issue_cmd(command);
 364         sc->ips_poll_cmd(command);
 365         return;
 366 }
 367
 368 static void
 369 ipsd_dump_block_complete(ips_command_t *command)
 370 {
 371         if (COMMAND_ERROR(&command->status)) {
 372                 kprintf("ipsd_dump completion error= 0x%x\n",
 373                        command->status.value);
 374         }
 375         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
 376             BUS_DMASYNC_POSTWRITE);
 377         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
 378 }
 379
 380 #endif