ips_disk.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Written by: David Jeffery
    5  * Copyright (c) 2002 Adaptec Inc.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 #include <dev/ips/ipsreg.h>
   34 #include <dev/ips/ips.h>
   35 #include <dev/ips/ips_disk.h>
   36 #include <sys/stat.h>
   37 
   38 static int ipsd_probe(device_t dev);
   39 static int ipsd_attach(device_t dev);
   40 static int ipsd_detach(device_t dev);
   41 
   42 static int ipsd_dump(void *arg, void *virtual, off_t offset, size_t length);
   43 static void ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs,
   44                              int error);
   45 static void ipsd_dump_block_complete(ips_command_t *command);
   46 
   47 static disk_open_t ipsd_open;
   48 static disk_close_t ipsd_close;
   49 static disk_strategy_t ipsd_strategy;
   50 
   51 static device_method_t ipsd_methods[] = {
   52         DEVMETHOD(device_probe,         ipsd_probe),
   53         DEVMETHOD(device_attach,        ipsd_attach),
   54         DEVMETHOD(device_detach,        ipsd_detach),
   55         { 0, 0 }
   56 };
   57 
   58 static driver_t ipsd_driver = {
   59         "ipsd",
   60         ipsd_methods,
   61         sizeof(ipsdisk_softc_t)
   62 };
   63 
   64 DRIVER_MODULE(ipsd, ips, ipsd_driver, 0, 0);
   65 
   66 /* handle opening of disk device.  It must set up all
   67    information about the geometry and size of the disk */
   68 static int ipsd_open(struct disk *dp)
   69 {
   70         ipsdisk_softc_t *dsc = dp->d_drv1;
   71 
   72         dsc->state |= IPS_DEV_OPEN;
   73         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
   74         return 0;
   75 }
   76 
   77 static int ipsd_close(struct disk *dp)
   78 {
   79         ipsdisk_softc_t *dsc = dp->d_drv1;
   80         dsc->state &= ~IPS_DEV_OPEN;
   81         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
   82         return 0;
   83 }
   84 
   85 /* ipsd_finish is called to clean up and return a completed IO request */
   86 void ipsd_finish(struct bio *iobuf)
   87 {
   88         ipsdisk_softc_t *dsc;
   89         dsc = iobuf->bio_disk->d_drv1;  
   90 
   91         if (iobuf->bio_flags & BIO_ERROR) {
   92                 ipsdisk_softc_t *dsc;
   93                 dsc = iobuf->bio_disk->d_drv1; 
   94                 device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
   95         } else
   96                 iobuf->bio_resid = 0;
   97 
   98         biodone(iobuf); 
   99         ips_start_io_request(dsc->sc);
  100 }
  101 
  102 
  103 static void ipsd_strategy(struct bio *iobuf)
  104 {
  105         ipsdisk_softc_t *dsc;
  106 
  107         dsc = iobuf->bio_disk->d_drv1;  
  108         DEVICE_PRINTF(8,dsc->dev,"in strategy\n");
  109         iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
  110 
  111         if ((iobuf->bio_cmd != BIO_READ) &&
  112             (iobuf->bio_cmd != BIO_WRITE)) {
  113                 biofinish(iobuf, NULL, EOPNOTSUPP);
  114                 return;
  115         }
  116 
  117         mtx_lock(&dsc->sc->queue_mtx);
  118         bioq_insert_tail(&dsc->sc->queue, iobuf);
  119         ips_start_io_request(dsc->sc);
  120         mtx_unlock(&dsc->sc->queue_mtx);
  121 }
  122 
  123 static int ipsd_probe(device_t dev)
  124 {
  125         DEVICE_PRINTF(2,dev, "in probe\n");
  126         device_set_desc(dev, "Logical Drive");
  127         return 0;
  128 }
  129 
  130 static int ipsd_attach(device_t dev)
  131 {
  132         device_t adapter;
  133         ipsdisk_softc_t *dsc;
  134         u_int totalsectors;
  135 
  136         DEVICE_PRINTF(2,dev, "in attach\n");
  137 
  138         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  139         bzero(dsc, sizeof(ipsdisk_softc_t));
  140         adapter = device_get_parent(dev);
  141         dsc->dev = dev;
  142         dsc->sc = device_get_softc(adapter);
  143         dsc->unit = device_get_unit(dev);
  144         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
  145         dsc->ipsd_disk = disk_alloc();
  146         dsc->ipsd_disk->d_drv1 = dsc;
  147         dsc->ipsd_disk->d_name = "ipsd";
  148         dsc->ipsd_disk->d_maxsize = IPS_MAX_IO_SIZE;
  149         dsc->ipsd_disk->d_open = ipsd_open;
  150         dsc->ipsd_disk->d_close = ipsd_close;
  151         dsc->ipsd_disk->d_strategy = ipsd_strategy;
  152         dsc->ipsd_disk->d_dump = ipsd_dump;
  153 
  154         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
  155         if ((totalsectors > 0x400000) &&
  156                         ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
  157                 dsc->ipsd_disk->d_fwheads = IPS_NORM_HEADS;
  158                 dsc->ipsd_disk->d_fwsectors = IPS_NORM_SECTORS;
  159         } else {
  160                 dsc->ipsd_disk->d_fwheads = IPS_COMP_HEADS;
  161                 dsc->ipsd_disk->d_fwsectors = IPS_COMP_SECTORS;
  162         }
  163         dsc->ipsd_disk->d_sectorsize = IPS_BLKSIZE;
  164         dsc->ipsd_disk->d_mediasize = (off_t)totalsectors * IPS_BLKSIZE;
  165         dsc->ipsd_disk->d_unit = dsc->unit;
  166         dsc->ipsd_disk->d_flags = 0;
  167         disk_create(dsc->ipsd_disk, DISK_VERSION);
  168 
  169         device_printf(dev, "Logical Drive  (%dMB)\n",
  170                       dsc->sc->drives[dsc->disk_number].sector_count >> 11);
  171         return 0;
  172 }
  173 
  174 static int ipsd_detach(device_t dev)
  175 {
  176         ipsdisk_softc_t *dsc;
  177 
  178         DEVICE_PRINTF(2, dev,"in detach\n");
  179         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  180         if(dsc->state & IPS_DEV_OPEN)
  181                 return (EBUSY);
  182         disk_destroy(dsc->ipsd_disk);
  183         return 0;
  184 }
  185 
  186 static int
  187 ipsd_dump(void *arg, void *virtual, off_t offset, size_t length)
  188 {
  189         ipsdisk_softc_t *dsc;
  190         ips_softc_t *sc;
  191         ips_command_t *command;
  192         ips_io_cmd *command_struct;
  193         struct disk *dp;
  194         void *va;
  195         off_t off;
  196         size_t len;
  197         int error = 0;
  198 
  199         dp = arg;
  200         dsc = dp->d_drv1;
  201 
  202         if (dsc == NULL)
  203                 return (EINVAL);
  204         sc = dsc->sc;
  205 
  206         if (ips_get_free_cmd(sc, &command, 0) != 0) {
  207                 printf("ipsd: failed to get cmd for dump\n");
  208                 return (ENOMEM);
  209         }
  210 
  211         command->data_dmatag = sc->sg_dmatag;
  212         command->callback = ipsd_dump_block_complete;
  213 
  214         command_struct = (ips_io_cmd *)command->command_buffer;
  215         command_struct->id = command->id;
  216         command_struct->drivenum= sc->drives[dsc->disk_number].drivenum;
  217 
  218         off = offset;
  219         va = virtual;
  220 
  221         while (length > 0) {
  222                 len =
  223                     (length > IPS_MAX_IO_SIZE) ? IPS_MAX_IO_SIZE : length;
  224 
  225                 command_struct->lba = off / IPS_BLKSIZE;
  226 
  227                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
  228                     va, len, ipsd_dump_map_sg, command, BUS_DMA_NOWAIT) != 0) {
  229                         error = EIO;
  230                         break;
  231                 }
  232                 if (COMMAND_ERROR(command)) {
  233                         error = EIO;
  234                         break;
  235                 }
  236 
  237                 length -= len;
  238                 off += len;
  239                 va = (uint8_t *)va + len;
  240         }
  241 
  242         ips_insert_free_cmd(command->sc, command);
  243         return (error);
  244 }
  245 
  246 static void
  247 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
  248 {
  249         ips_softc_t *sc;
  250         ips_command_t *command;
  251         ips_sg_element_t *sg_list;
  252         ips_io_cmd *command_struct;
  253         int i, length;
  254 
  255         command = (ips_command_t *)arg;
  256         sc = command->sc;
  257         length = 0;
  258 
  259         if (error) {
  260                 printf("ipsd_dump_map_sg: error %d\n", error);
  261                 ips_set_error(command, error);
  262                 return;
  263         }
  264 
  265         command_struct = (ips_io_cmd *)command->command_buffer;
  266 
  267         if (nsegs != 1) {
  268                 command_struct->segnum = nsegs;
  269                 sg_list = (ips_sg_element_t *)((uint8_t *)
  270                     command->command_buffer + IPS_COMMAND_LEN);
  271                 for (i = 0; i < nsegs; i++) {
  272                         sg_list[i].addr = segs[i].ds_addr;
  273                         sg_list[i].len = segs[i].ds_len;
  274                         length += segs[i].ds_len;
  275                 }
  276                 command_struct->buffaddr =
  277                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
  278                 command_struct->command = IPS_SG_WRITE_CMD;
  279         } else {
  280                 command_struct->buffaddr = segs[0].ds_addr;
  281                 length = segs[0].ds_len;
  282                 command_struct->segnum = 0;
  283                 command_struct->command = IPS_WRITE_CMD;
  284         }
  285 
  286         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
  287         command_struct->length = length;
  288         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
  289             BUS_DMASYNC_PREWRITE);
  290         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  291             BUS_DMASYNC_PREWRITE);
  292 
  293         sc->ips_issue_cmd(command);
  294         sc->ips_poll_cmd(command);
  295         return;
  296 }
  297 
  298 static void 
  299 ipsd_dump_block_complete(ips_command_t *command)
  300 {
  301 
  302         if (COMMAND_ERROR(command))
  303                 printf("ipsd_dump completion error= 0x%x\n",
  304                     command->status.value);
  305 
  306         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  307             BUS_DMASYNC_POSTWRITE);
  308         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
  309 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/ips/ips_disk.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ips/ips_disk.c
