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 static devclass_t ipsd_devclass;
   65 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
   66 
   67 /* handle opening of disk device.  It must set up all
   68    information about the geometry and size of the disk */
   69 static int ipsd_open(struct disk *dp)
   70 {
   71         ipsdisk_softc_t *dsc = dp->d_drv1;
   72 
   73         dsc->state |= IPS_DEV_OPEN;
   74         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
   75         return 0;
   76 }
   77 
   78 static int ipsd_close(struct disk *dp)
   79 {
   80         ipsdisk_softc_t *dsc = dp->d_drv1;
   81         dsc->state &= ~IPS_DEV_OPEN;
   82         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
   83         return 0;
   84 }
   85 
   86 /* ipsd_finish is called to clean up and return a completed IO request */
   87 void ipsd_finish(struct bio *iobuf)
   88 {
   89         ipsdisk_softc_t *dsc;
   90         dsc = iobuf->bio_disk->d_drv1;  
   91 
   92         if (iobuf->bio_flags & BIO_ERROR) {
   93                 ipsdisk_softc_t *dsc;
   94                 dsc = iobuf->bio_disk->d_drv1; 
   95                 device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
   96         } else
   97                 iobuf->bio_resid = 0;
   98 
   99         biodone(iobuf); 
  100         ips_start_io_request(dsc->sc);
  101 }
  102 
  103 
  104 static void ipsd_strategy(struct bio *iobuf)
  105 {
  106         ipsdisk_softc_t *dsc;
  107 
  108         dsc = iobuf->bio_disk->d_drv1;  
  109         DEVICE_PRINTF(8,dsc->dev,"in strategy\n");
  110         iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
  111 
  112         if ((iobuf->bio_cmd != BIO_READ) &&
  113             (iobuf->bio_cmd != BIO_WRITE)) {
  114                 biofinish(iobuf, NULL, EOPNOTSUPP);
  115                 return;
  116         }
  117 
  118         mtx_lock(&dsc->sc->queue_mtx);
  119         bioq_insert_tail(&dsc->sc->queue, iobuf);
  120         ips_start_io_request(dsc->sc);
  121         mtx_unlock(&dsc->sc->queue_mtx);
  122 }
  123 
  124 static int ipsd_probe(device_t dev)
  125 {
  126         DEVICE_PRINTF(2,dev, "in probe\n");
  127         device_set_desc(dev, "Logical Drive");
  128         return 0;
  129 }
  130 
  131 static int ipsd_attach(device_t dev)
  132 {
  133         device_t adapter;
  134         ipsdisk_softc_t *dsc;
  135         u_int totalsectors;
  136 
  137         DEVICE_PRINTF(2,dev, "in attach\n");
  138 
  139         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  140         bzero(dsc, sizeof(ipsdisk_softc_t));
  141         adapter = device_get_parent(dev);
  142         dsc->dev = dev;
  143         dsc->sc = device_get_softc(adapter);
  144         dsc->unit = device_get_unit(dev);
  145         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
  146         dsc->ipsd_disk = disk_alloc();
  147         dsc->ipsd_disk->d_drv1 = dsc;
  148         dsc->ipsd_disk->d_name = "ipsd";
  149         dsc->ipsd_disk->d_maxsize = IPS_MAX_IO_SIZE;
  150         dsc->ipsd_disk->d_open = ipsd_open;
  151         dsc->ipsd_disk->d_close = ipsd_close;
  152         dsc->ipsd_disk->d_strategy = ipsd_strategy;
  153         dsc->ipsd_disk->d_dump = ipsd_dump;
  154 
  155         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
  156         if ((totalsectors > 0x400000) &&
  157                         ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
  158                 dsc->ipsd_disk->d_fwheads = IPS_NORM_HEADS;
  159                 dsc->ipsd_disk->d_fwsectors = IPS_NORM_SECTORS;
  160         } else {
  161                 dsc->ipsd_disk->d_fwheads = IPS_COMP_HEADS;
  162                 dsc->ipsd_disk->d_fwsectors = IPS_COMP_SECTORS;
  163         }
  164         dsc->ipsd_disk->d_sectorsize = IPS_BLKSIZE;
  165         dsc->ipsd_disk->d_mediasize = (off_t)totalsectors * IPS_BLKSIZE;
  166         dsc->ipsd_disk->d_unit = dsc->unit;
  167         dsc->ipsd_disk->d_flags = 0;
  168         disk_create(dsc->ipsd_disk, DISK_VERSION);
  169 
  170         device_printf(dev, "Logical Drive  (%dMB)\n",
  171                       dsc->sc->drives[dsc->disk_number].sector_count >> 11);
  172         return 0;
  173 }
  174 
  175 static int ipsd_detach(device_t dev)
  176 {
  177         ipsdisk_softc_t *dsc;
  178 
  179         DEVICE_PRINTF(2, dev,"in detach\n");
  180         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  181         if(dsc->state & IPS_DEV_OPEN)
  182                 return (EBUSY);
  183         disk_destroy(dsc->ipsd_disk);
  184         return 0;
  185 }
  186 
  187 static int
  188 ipsd_dump(void *arg, void *virtual, off_t offset, size_t length)
  189 {
  190         ipsdisk_softc_t *dsc;
  191         ips_softc_t *sc;
  192         ips_command_t *command;
  193         ips_io_cmd *command_struct;
  194         struct disk *dp;
  195         void *va;
  196         off_t off;
  197         size_t len;
  198         int error = 0;
  199 
  200         dp = arg;
  201         dsc = dp->d_drv1;
  202 
  203         if (dsc == NULL)
  204                 return (EINVAL);
  205         sc = dsc->sc;
  206 
  207         if (ips_get_free_cmd(sc, &command, 0) != 0) {
  208                 printf("ipsd: failed to get cmd for dump\n");
  209                 return (ENOMEM);
  210         }
  211 
  212         command->data_dmatag = sc->sg_dmatag;
  213         command->callback = ipsd_dump_block_complete;
  214 
  215         command_struct = (ips_io_cmd *)command->command_buffer;
  216         command_struct->id = command->id;
  217         command_struct->drivenum= sc->drives[dsc->disk_number].drivenum;
  218 
  219         off = offset;
  220         va = virtual;
  221 
  222         while (length > 0) {
  223                 len =
  224                     (length > IPS_MAX_IO_SIZE) ? IPS_MAX_IO_SIZE : length;
  225 
  226                 command_struct->lba = off / IPS_BLKSIZE;
  227 
  228                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
  229                     va, len, ipsd_dump_map_sg, command, BUS_DMA_NOWAIT) != 0) {
  230                         error = EIO;
  231                         break;
  232                 }
  233                 if (COMMAND_ERROR(command)) {
  234                         error = EIO;
  235                         break;
  236                 }
  237 
  238                 length -= len;
  239                 off += len;
  240                 va = (uint8_t *)va + len;
  241         }
  242 
  243         ips_insert_free_cmd(command->sc, command);
  244         return (error);
  245 }
  246 
  247 static void
  248 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
  249 {
  250         ips_softc_t *sc;
  251         ips_command_t *command;
  252         ips_sg_element_t *sg_list;
  253         ips_io_cmd *command_struct;
  254         int i, length;
  255 
  256         command = (ips_command_t *)arg;
  257         sc = command->sc;
  258         length = 0;
  259 
  260         if (error) {
  261                 printf("ipsd_dump_map_sg: error %d\n", error);
  262                 ips_set_error(command, error);
  263                 return;
  264         }
  265 
  266         command_struct = (ips_io_cmd *)command->command_buffer;
  267 
  268         if (nsegs != 1) {
  269                 command_struct->segnum = nsegs;
  270                 sg_list = (ips_sg_element_t *)((uint8_t *)
  271                     command->command_buffer + IPS_COMMAND_LEN);
  272                 for (i = 0; i < nsegs; i++) {
  273                         sg_list[i].addr = segs[i].ds_addr;
  274                         sg_list[i].len = segs[i].ds_len;
  275                         length += segs[i].ds_len;
  276                 }
  277                 command_struct->buffaddr =
  278                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
  279                 command_struct->command = IPS_SG_WRITE_CMD;
  280         } else {
  281                 command_struct->buffaddr = segs[0].ds_addr;
  282                 length = segs[0].ds_len;
  283                 command_struct->segnum = 0;
  284                 command_struct->command = IPS_WRITE_CMD;
  285         }
  286 
  287         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
  288         command_struct->length = length;
  289         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
  290             BUS_DMASYNC_PREWRITE);
  291         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  292             BUS_DMASYNC_PREWRITE);
  293 
  294         sc->ips_issue_cmd(command);
  295         sc->ips_poll_cmd(command);
  296         return;
  297 }
  298 
  299 static void 
  300 ipsd_dump_block_complete(ips_command_t *command)
  301 {
  302 
  303         if (COMMAND_ERROR(command))
  304                 printf("ipsd_dump completion error= 0x%x\n",
  305                     command->status.value);
  306 
  307         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  308             BUS_DMASYNC_POSTWRITE);
  309         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
  310 }
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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
