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: releng/11.0/sys/dev/ips/ips_disk.c 198329 2009-10-21 15:04:50Z brueffer $");
   30 
   31 #include <dev/ips/ipsreg.h>
   32 #include <dev/ips/ips.h>
   33 #include <dev/ips/ips_disk.h>
   34 #include <sys/stat.h>
   35 
   36 static int ipsd_probe(device_t dev);
   37 static int ipsd_attach(device_t dev);
   38 static int ipsd_detach(device_t dev);
   39 
   40 static int ipsd_dump(void *arg, void *virtual, vm_offset_t physical,
   41                      off_t offset, size_t length);
   42 static void ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs,
   43                              int error);
   44 static void ipsd_dump_block_complete(ips_command_t *command);
   45 
   46 static disk_open_t ipsd_open;
   47 static disk_close_t ipsd_close;
   48 static disk_strategy_t ipsd_strategy;
   49 
   50 static device_method_t ipsd_methods[] = {
   51         DEVMETHOD(device_probe,         ipsd_probe),
   52         DEVMETHOD(device_attach,        ipsd_attach),
   53         DEVMETHOD(device_detach,        ipsd_detach),
   54         { 0, 0 }
   55 };
   56 
   57 static driver_t ipsd_driver = {
   58         "ipsd",
   59         ipsd_methods,
   60         sizeof(ipsdisk_softc_t)
   61 };
   62 
   63 static devclass_t ipsd_devclass;
   64 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 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         mtx_lock(&dsc->sc->queue_mtx);
  111         bioq_insert_tail(&dsc->sc->queue, iobuf);
  112         ips_start_io_request(dsc->sc);
  113         mtx_unlock(&dsc->sc->queue_mtx);
  114 }
  115 
  116 static int ipsd_probe(device_t dev)
  117 {
  118         DEVICE_PRINTF(2,dev, "in probe\n");
  119         device_set_desc(dev, "Logical Drive");
  120         return 0;
  121 }
  122 
  123 static int ipsd_attach(device_t dev)
  124 {
  125         device_t adapter;
  126         ipsdisk_softc_t *dsc;
  127         u_int totalsectors;
  128 
  129         DEVICE_PRINTF(2,dev, "in attach\n");
  130 
  131         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  132         bzero(dsc, sizeof(ipsdisk_softc_t));
  133         adapter = device_get_parent(dev);
  134         dsc->dev = dev;
  135         dsc->sc = device_get_softc(adapter);
  136         dsc->unit = device_get_unit(dev);
  137         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
  138         dsc->ipsd_disk = disk_alloc();
  139         dsc->ipsd_disk->d_drv1 = dsc;
  140         dsc->ipsd_disk->d_name = "ipsd";
  141         dsc->ipsd_disk->d_maxsize = IPS_MAX_IO_SIZE;
  142         dsc->ipsd_disk->d_open = ipsd_open;
  143         dsc->ipsd_disk->d_close = ipsd_close;
  144         dsc->ipsd_disk->d_strategy = ipsd_strategy;
  145         dsc->ipsd_disk->d_dump = ipsd_dump;
  146 
  147         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
  148         if ((totalsectors > 0x400000) &&
  149                         ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
  150                 dsc->ipsd_disk->d_fwheads = IPS_NORM_HEADS;
  151                 dsc->ipsd_disk->d_fwsectors = IPS_NORM_SECTORS;
  152         } else {
  153                 dsc->ipsd_disk->d_fwheads = IPS_COMP_HEADS;
  154                 dsc->ipsd_disk->d_fwsectors = IPS_COMP_SECTORS;
  155         }
  156         dsc->ipsd_disk->d_sectorsize = IPS_BLKSIZE;
  157         dsc->ipsd_disk->d_mediasize = (off_t)totalsectors * IPS_BLKSIZE;
  158         dsc->ipsd_disk->d_unit = dsc->unit;
  159         dsc->ipsd_disk->d_flags = 0;
  160         disk_create(dsc->ipsd_disk, DISK_VERSION);
  161 
  162         device_printf(dev, "Logical Drive  (%dMB)\n",
  163                       dsc->sc->drives[dsc->disk_number].sector_count >> 11);
  164         return 0;
  165 }
  166 
  167 static int ipsd_detach(device_t dev)
  168 {
  169         ipsdisk_softc_t *dsc;
  170 
  171         DEVICE_PRINTF(2, dev,"in detach\n");
  172         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  173         if(dsc->state & IPS_DEV_OPEN)
  174                 return (EBUSY);
  175         disk_destroy(dsc->ipsd_disk);
  176         return 0;
  177 }
  178 
  179 static int
  180 ipsd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset,
  181           size_t length)
  182 {
  183         ipsdisk_softc_t *dsc;
  184         ips_softc_t *sc;
  185         ips_command_t *command;
  186         ips_io_cmd *command_struct;
  187         struct disk *dp;
  188         void *va;
  189         off_t off;
  190         size_t len;
  191         int error = 0;
  192 
  193         dp = arg;
  194         dsc = dp->d_drv1;
  195 
  196         if (dsc == NULL)
  197                 return (EINVAL);
  198         sc = dsc->sc;
  199 
  200         if (ips_get_free_cmd(sc, &command, 0) != 0) {
  201                 printf("ipsd: failed to get cmd for dump\n");
  202                 return (ENOMEM);
  203         }
  204 
  205         command->data_dmatag = sc->sg_dmatag;
  206         command->callback = ipsd_dump_block_complete;
  207 
  208         command_struct = (ips_io_cmd *)command->command_buffer;
  209         command_struct->id = command->id;
  210         command_struct->drivenum= sc->drives[dsc->disk_number].drivenum;
  211 
  212         off = offset;
  213         va = virtual;
  214 
  215         while (length > 0) {
  216                 len =
  217                     (length > IPS_MAX_IO_SIZE) ? IPS_MAX_IO_SIZE : length;
  218 
  219                 command_struct->lba = off / IPS_BLKSIZE;
  220 
  221                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
  222                     va, len, ipsd_dump_map_sg, command, BUS_DMA_NOWAIT) != 0) {
  223                         error = EIO;
  224                         break;
  225                 }
  226                 if (COMMAND_ERROR(command)) {
  227                         error = EIO;
  228                         break;
  229                 }
  230 
  231                 length -= len;
  232                 off += len;
  233                 va = (uint8_t *)va + len;
  234         }
  235 
  236         ips_insert_free_cmd(command->sc, command);
  237         return (error);
  238 }
  239 
  240 static void
  241 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
  242 {
  243         ips_softc_t *sc;
  244         ips_command_t *command;
  245         ips_sg_element_t *sg_list;
  246         ips_io_cmd *command_struct;
  247         int i, length;
  248 
  249         command = (ips_command_t *)arg;
  250         sc = command->sc;
  251         length = 0;
  252 
  253         if (error) {
  254                 printf("ipsd_dump_map_sg: error %d\n", error);
  255                 ips_set_error(command, error);
  256                 return;
  257         }
  258 
  259         command_struct = (ips_io_cmd *)command->command_buffer;
  260 
  261         if (nsegs != 1) {
  262                 command_struct->segnum = nsegs;
  263                 sg_list = (ips_sg_element_t *)((uint8_t *)
  264                     command->command_buffer + IPS_COMMAND_LEN);
  265                 for (i = 0; i < nsegs; i++) {
  266                         sg_list[i].addr = segs[i].ds_addr;
  267                         sg_list[i].len = segs[i].ds_len;
  268                         length += segs[i].ds_len;
  269                 }
  270                 command_struct->buffaddr =
  271                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
  272                 command_struct->command = IPS_SG_WRITE_CMD;
  273         } else {
  274                 command_struct->buffaddr = segs[0].ds_addr;
  275                 length = segs[0].ds_len;
  276                 command_struct->segnum = 0;
  277                 command_struct->command = IPS_WRITE_CMD;
  278         }
  279 
  280         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
  281         command_struct->length = length;
  282         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
  283             BUS_DMASYNC_PREWRITE);
  284         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  285             BUS_DMASYNC_PREWRITE);
  286 
  287         sc->ips_issue_cmd(command);
  288         sc->ips_poll_cmd(command);
  289         return;
  290 }
  291 
  292 static void 
  293 ipsd_dump_block_complete(ips_command_t *command)
  294 {
  295 
  296         if (COMMAND_ERROR(command))
  297                 printf("ipsd_dump completion error= 0x%x\n",
  298                     command->status.value);
  299 
  300         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  301             BUS_DMASYNC_POSTWRITE);
  302         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
  303 }

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