The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    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 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <dev/ips/ips.h>
   32 #include <dev/ips/ips_disk.h>
   33 #include <sys/stat.h>
   34 
   35 static int ipsd_probe(device_t dev);
   36 static int ipsd_attach(device_t dev);
   37 static int ipsd_detach(device_t dev);
   38 
   39 static int ipsd_dump(void *arg, void *virtual, vm_offset_t physical,
   40                      off_t offset, size_t length);
   41 static void ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs,
   42                              int error);
   43 static void ipsd_dump_block_complete(ips_command_t *command);
   44 
   45 static disk_open_t ipsd_open;
   46 static disk_close_t ipsd_close;
   47 static disk_strategy_t ipsd_strategy;
   48 
   49 static device_method_t ipsd_methods[] = {
   50         DEVMETHOD(device_probe,         ipsd_probe),
   51         DEVMETHOD(device_attach,        ipsd_attach),
   52         DEVMETHOD(device_detach,        ipsd_detach),
   53         { 0, 0 }
   54 };
   55 
   56 static driver_t ipsd_driver = {
   57         "ipsd",
   58         ipsd_methods,
   59         sizeof(ipsdisk_softc_t)
   60 };
   61 
   62 static devclass_t ipsd_devclass;
   63 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
   64 
   65 /* handle opening of disk device.  It must set up all
   66    information about the geometry and size of the disk */
   67 static int ipsd_open(struct disk *dp)
   68 {
   69         ipsdisk_softc_t *dsc = dp->d_drv1;
   70 
   71         dsc->state |= IPS_DEV_OPEN;
   72         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
   73         return 0;
   74 }
   75 
   76 static int ipsd_close(struct disk *dp)
   77 {
   78         ipsdisk_softc_t *dsc = dp->d_drv1;
   79         dsc->state &= ~IPS_DEV_OPEN;
   80         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
   81         return 0;
   82 }
   83 
   84 /* ipsd_finish is called to clean up and return a completed IO request */
   85 void ipsd_finish(struct bio *iobuf)
   86 {
   87         ipsdisk_softc_t *dsc;
   88         dsc = iobuf->bio_disk->d_drv1;  
   89 
   90         if (iobuf->bio_flags & BIO_ERROR) {
   91                 ipsdisk_softc_t *dsc;
   92                 dsc = iobuf->bio_disk->d_drv1; 
   93                 device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
   94         } else
   95                 iobuf->bio_resid = 0;
   96 
   97         biodone(iobuf); 
   98         ips_start_io_request(dsc->sc);
   99 }
  100 
  101 
  102 static void ipsd_strategy(struct bio *iobuf)
  103 {
  104         ipsdisk_softc_t *dsc;
  105 
  106         dsc = iobuf->bio_disk->d_drv1;  
  107         DEVICE_PRINTF(8,dsc->dev,"in strategy\n");
  108         iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
  109         mtx_lock(&dsc->sc->queue_mtx);
  110         bioq_insert_tail(&dsc->sc->queue, iobuf);
  111         ips_start_io_request(dsc->sc);
  112         mtx_unlock(&dsc->sc->queue_mtx);
  113 }
  114 
  115 static int ipsd_probe(device_t dev)
  116 {
  117         DEVICE_PRINTF(2,dev, "in probe\n");
  118         device_set_desc(dev, "Logical Drive");
  119         return 0;
  120 }
  121 
  122 static int ipsd_attach(device_t dev)
  123 {
  124         device_t adapter;
  125         ipsdisk_softc_t *dsc;
  126         u_int totalsectors;
  127 
  128         DEVICE_PRINTF(2,dev, "in attach\n");
  129 
  130         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  131         bzero(dsc, sizeof(ipsdisk_softc_t));
  132         adapter = device_get_parent(dev);
  133         dsc->dev = dev;
  134         dsc->sc = device_get_softc(adapter);
  135         dsc->unit = device_get_unit(dev);
  136         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
  137         dsc->ipsd_disk = disk_alloc();
  138         dsc->ipsd_disk->d_drv1 = dsc;
  139         dsc->ipsd_disk->d_name = "ipsd";
  140         dsc->ipsd_disk->d_maxsize = IPS_MAX_IO_SIZE;
  141         dsc->ipsd_disk->d_open = ipsd_open;
  142         dsc->ipsd_disk->d_close = ipsd_close;
  143         dsc->ipsd_disk->d_strategy = ipsd_strategy;
  144         dsc->ipsd_disk->d_dump = ipsd_dump;
  145 
  146         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
  147         if ((totalsectors > 0x400000) &&
  148                         ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
  149                 dsc->ipsd_disk->d_fwheads = IPS_NORM_HEADS;
  150                 dsc->ipsd_disk->d_fwsectors = IPS_NORM_SECTORS;
  151         } else {
  152                 dsc->ipsd_disk->d_fwheads = IPS_COMP_HEADS;
  153                 dsc->ipsd_disk->d_fwsectors = IPS_COMP_SECTORS;
  154         }
  155         dsc->ipsd_disk->d_sectorsize = IPS_BLKSIZE;
  156         dsc->ipsd_disk->d_mediasize = (off_t)totalsectors * IPS_BLKSIZE;
  157         dsc->ipsd_disk->d_unit = dsc->unit;
  158         dsc->ipsd_disk->d_flags = 0;
  159         disk_create(dsc->ipsd_disk, DISK_VERSION);
  160 
  161         device_printf(dev, "Logical Drive  (%dMB)\n",
  162                       dsc->sc->drives[dsc->disk_number].sector_count >> 11);
  163         return 0;
  164 }
  165 
  166 static int ipsd_detach(device_t dev)
  167 {
  168         ipsdisk_softc_t *dsc;
  169 
  170         DEVICE_PRINTF(2, dev,"in detach\n");
  171         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  172         if(dsc->state & IPS_DEV_OPEN)
  173                 return (EBUSY);
  174         disk_destroy(dsc->ipsd_disk);
  175         return 0;
  176 }
  177 
  178 static int
  179 ipsd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset,
  180           size_t length)
  181 {
  182         ipsdisk_softc_t *dsc;
  183         ips_softc_t *sc;
  184         ips_command_t *command;
  185         ips_io_cmd *command_struct;
  186         struct disk *dp;
  187         void *va;
  188         off_t off;
  189         size_t len;
  190         int error = 0;
  191 
  192         dp = arg;
  193         dsc = dp->d_drv1;
  194         sc = dsc->sc;
  195 
  196         if (dsc == NULL)
  197                 return (EINVAL);
  198 
  199         if (ips_get_free_cmd(sc, &command, 0) != 0) {
  200                 printf("ipsd: failed to get cmd for dump\n");
  201                 return (ENOMEM);
  202         }
  203 
  204         command->data_dmatag = sc->sg_dmatag;
  205         command->callback = ipsd_dump_block_complete;
  206 
  207         command_struct = (ips_io_cmd *)command->command_buffer;
  208         command_struct->id = command->id;
  209         command_struct->drivenum= sc->drives[dsc->disk_number].drivenum;
  210 
  211         off = offset;
  212         va = virtual;
  213 
  214         while (length > 0) {
  215                 len =
  216                     (length > IPS_MAX_IO_SIZE) ? IPS_MAX_IO_SIZE : length;
  217 
  218                 command_struct->lba = off / IPS_BLKSIZE;
  219 
  220                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
  221                     va, len, ipsd_dump_map_sg, command, BUS_DMA_NOWAIT) != 0) {
  222                         error = EIO;
  223                         break;
  224                 }
  225                 if (COMMAND_ERROR(&command->status)) {
  226                         error = EIO;
  227                         break;
  228                 }
  229 
  230                 length -= len;
  231                 off += len;
  232                 va = (uint8_t *)va + len;
  233         }
  234 
  235         ips_insert_free_cmd(command->sc, command);
  236         return (error);
  237 }
  238 
  239 static void
  240 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
  241 {
  242         ips_softc_t *sc;
  243         ips_command_t *command;
  244         ips_sg_element_t *sg_list;
  245         ips_io_cmd *command_struct;
  246         int i, length;
  247 
  248         command = (ips_command_t *)arg;
  249         sc = command->sc;
  250         length = 0;
  251 
  252         if (error) {
  253                 printf("ipsd_dump_map_sg: error %d\n", error);
  254                 command->status.value = IPS_ERROR_STATUS;
  255                 return;
  256         }
  257 
  258         command_struct = (ips_io_cmd *)command->command_buffer;
  259 
  260         if (nsegs != 1) {
  261                 command_struct->segnum = nsegs;
  262                 sg_list = (ips_sg_element_t *)((uint8_t *)
  263                     command->command_buffer + IPS_COMMAND_LEN);
  264                 for (i = 0; i < nsegs; i++) {
  265                         sg_list[i].addr = segs[i].ds_addr;
  266                         sg_list[i].len = segs[i].ds_len;
  267                         length += segs[i].ds_len;
  268                 }
  269                 command_struct->buffaddr =
  270                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
  271                 command_struct->command = IPS_SG_WRITE_CMD;
  272         } else {
  273                 command_struct->buffaddr = segs[0].ds_addr;
  274                 length = segs[0].ds_len;
  275                 command_struct->segnum = 0;
  276                 command_struct->command = IPS_WRITE_CMD;
  277         }
  278 
  279         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
  280         command_struct->length = length;
  281         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
  282             BUS_DMASYNC_PREWRITE);
  283         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  284             BUS_DMASYNC_PREWRITE);
  285 
  286         sc->ips_issue_cmd(command);
  287         sc->ips_poll_cmd(command);
  288         return;
  289 }
  290 
  291 static void 
  292 ipsd_dump_block_complete(ips_command_t *command)
  293 {
  294 
  295         if (COMMAND_ERROR(&command->status))
  296                 printf("ipsd_dump completion error= 0x%x\n",
  297                     command->status.value);
  298 
  299         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  300             BUS_DMASYNC_POSTWRITE);
  301         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
  302 }

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