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  * 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: releng/12.0/sys/dev/ips/ips_disk.c 326255 2017-11-27 14:52:40Z pfg $");
   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, vm_offset_t physical,
   43                      off_t offset, size_t length);
   44 static void ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs,
   45                              int error);
   46 static void ipsd_dump_block_complete(ips_command_t *command);
   47 
   48 static disk_open_t ipsd_open;
   49 static disk_close_t ipsd_close;
   50 static disk_strategy_t ipsd_strategy;
   51 
   52 static device_method_t ipsd_methods[] = {
   53         DEVMETHOD(device_probe,         ipsd_probe),
   54         DEVMETHOD(device_attach,        ipsd_attach),
   55         DEVMETHOD(device_detach,        ipsd_detach),
   56         { 0, 0 }
   57 };
   58 
   59 static driver_t ipsd_driver = {
   60         "ipsd",
   61         ipsd_methods,
   62         sizeof(ipsdisk_softc_t)
   63 };
   64 
   65 static devclass_t ipsd_devclass;
   66 DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
   67 
   68 /* handle opening of disk device.  It must set up all
   69    information about the geometry and size of the disk */
   70 static int ipsd_open(struct disk *dp)
   71 {
   72         ipsdisk_softc_t *dsc = dp->d_drv1;
   73 
   74         dsc->state |= IPS_DEV_OPEN;
   75         DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
   76         return 0;
   77 }
   78 
   79 static int ipsd_close(struct disk *dp)
   80 {
   81         ipsdisk_softc_t *dsc = dp->d_drv1;
   82         dsc->state &= ~IPS_DEV_OPEN;
   83         DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
   84         return 0;
   85 }
   86 
   87 /* ipsd_finish is called to clean up and return a completed IO request */
   88 void ipsd_finish(struct bio *iobuf)
   89 {
   90         ipsdisk_softc_t *dsc;
   91         dsc = iobuf->bio_disk->d_drv1;  
   92 
   93         if (iobuf->bio_flags & BIO_ERROR) {
   94                 ipsdisk_softc_t *dsc;
   95                 dsc = iobuf->bio_disk->d_drv1; 
   96                 device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
   97         } else
   98                 iobuf->bio_resid = 0;
   99 
  100         biodone(iobuf); 
  101         ips_start_io_request(dsc->sc);
  102 }
  103 
  104 
  105 static void ipsd_strategy(struct bio *iobuf)
  106 {
  107         ipsdisk_softc_t *dsc;
  108 
  109         dsc = iobuf->bio_disk->d_drv1;  
  110         DEVICE_PRINTF(8,dsc->dev,"in strategy\n");
  111         iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
  112         mtx_lock(&dsc->sc->queue_mtx);
  113         bioq_insert_tail(&dsc->sc->queue, iobuf);
  114         ips_start_io_request(dsc->sc);
  115         mtx_unlock(&dsc->sc->queue_mtx);
  116 }
  117 
  118 static int ipsd_probe(device_t dev)
  119 {
  120         DEVICE_PRINTF(2,dev, "in probe\n");
  121         device_set_desc(dev, "Logical Drive");
  122         return 0;
  123 }
  124 
  125 static int ipsd_attach(device_t dev)
  126 {
  127         device_t adapter;
  128         ipsdisk_softc_t *dsc;
  129         u_int totalsectors;
  130 
  131         DEVICE_PRINTF(2,dev, "in attach\n");
  132 
  133         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  134         bzero(dsc, sizeof(ipsdisk_softc_t));
  135         adapter = device_get_parent(dev);
  136         dsc->dev = dev;
  137         dsc->sc = device_get_softc(adapter);
  138         dsc->unit = device_get_unit(dev);
  139         dsc->disk_number = (uintptr_t) device_get_ivars(dev);
  140         dsc->ipsd_disk = disk_alloc();
  141         dsc->ipsd_disk->d_drv1 = dsc;
  142         dsc->ipsd_disk->d_name = "ipsd";
  143         dsc->ipsd_disk->d_maxsize = IPS_MAX_IO_SIZE;
  144         dsc->ipsd_disk->d_open = ipsd_open;
  145         dsc->ipsd_disk->d_close = ipsd_close;
  146         dsc->ipsd_disk->d_strategy = ipsd_strategy;
  147         dsc->ipsd_disk->d_dump = ipsd_dump;
  148 
  149         totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
  150         if ((totalsectors > 0x400000) &&
  151                         ((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
  152                 dsc->ipsd_disk->d_fwheads = IPS_NORM_HEADS;
  153                 dsc->ipsd_disk->d_fwsectors = IPS_NORM_SECTORS;
  154         } else {
  155                 dsc->ipsd_disk->d_fwheads = IPS_COMP_HEADS;
  156                 dsc->ipsd_disk->d_fwsectors = IPS_COMP_SECTORS;
  157         }
  158         dsc->ipsd_disk->d_sectorsize = IPS_BLKSIZE;
  159         dsc->ipsd_disk->d_mediasize = (off_t)totalsectors * IPS_BLKSIZE;
  160         dsc->ipsd_disk->d_unit = dsc->unit;
  161         dsc->ipsd_disk->d_flags = 0;
  162         disk_create(dsc->ipsd_disk, DISK_VERSION);
  163 
  164         device_printf(dev, "Logical Drive  (%dMB)\n",
  165                       dsc->sc->drives[dsc->disk_number].sector_count >> 11);
  166         return 0;
  167 }
  168 
  169 static int ipsd_detach(device_t dev)
  170 {
  171         ipsdisk_softc_t *dsc;
  172 
  173         DEVICE_PRINTF(2, dev,"in detach\n");
  174         dsc = (ipsdisk_softc_t *)device_get_softc(dev);
  175         if(dsc->state & IPS_DEV_OPEN)
  176                 return (EBUSY);
  177         disk_destroy(dsc->ipsd_disk);
  178         return 0;
  179 }
  180 
  181 static int
  182 ipsd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset,
  183           size_t length)
  184 {
  185         ipsdisk_softc_t *dsc;
  186         ips_softc_t *sc;
  187         ips_command_t *command;
  188         ips_io_cmd *command_struct;
  189         struct disk *dp;
  190         void *va;
  191         off_t off;
  192         size_t len;
  193         int error = 0;
  194 
  195         dp = arg;
  196         dsc = dp->d_drv1;
  197 
  198         if (dsc == NULL)
  199                 return (EINVAL);
  200         sc = dsc->sc;
  201 
  202         if (ips_get_free_cmd(sc, &command, 0) != 0) {
  203                 printf("ipsd: failed to get cmd for dump\n");
  204                 return (ENOMEM);
  205         }
  206 
  207         command->data_dmatag = sc->sg_dmatag;
  208         command->callback = ipsd_dump_block_complete;
  209 
  210         command_struct = (ips_io_cmd *)command->command_buffer;
  211         command_struct->id = command->id;
  212         command_struct->drivenum= sc->drives[dsc->disk_number].drivenum;
  213 
  214         off = offset;
  215         va = virtual;
  216 
  217         while (length > 0) {
  218                 len =
  219                     (length > IPS_MAX_IO_SIZE) ? IPS_MAX_IO_SIZE : length;
  220 
  221                 command_struct->lba = off / IPS_BLKSIZE;
  222 
  223                 if (bus_dmamap_load(command->data_dmatag, command->data_dmamap,
  224                     va, len, ipsd_dump_map_sg, command, BUS_DMA_NOWAIT) != 0) {
  225                         error = EIO;
  226                         break;
  227                 }
  228                 if (COMMAND_ERROR(command)) {
  229                         error = EIO;
  230                         break;
  231                 }
  232 
  233                 length -= len;
  234                 off += len;
  235                 va = (uint8_t *)va + len;
  236         }
  237 
  238         ips_insert_free_cmd(command->sc, command);
  239         return (error);
  240 }
  241 
  242 static void
  243 ipsd_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
  244 {
  245         ips_softc_t *sc;
  246         ips_command_t *command;
  247         ips_sg_element_t *sg_list;
  248         ips_io_cmd *command_struct;
  249         int i, length;
  250 
  251         command = (ips_command_t *)arg;
  252         sc = command->sc;
  253         length = 0;
  254 
  255         if (error) {
  256                 printf("ipsd_dump_map_sg: error %d\n", error);
  257                 ips_set_error(command, error);
  258                 return;
  259         }
  260 
  261         command_struct = (ips_io_cmd *)command->command_buffer;
  262 
  263         if (nsegs != 1) {
  264                 command_struct->segnum = nsegs;
  265                 sg_list = (ips_sg_element_t *)((uint8_t *)
  266                     command->command_buffer + IPS_COMMAND_LEN);
  267                 for (i = 0; i < nsegs; i++) {
  268                         sg_list[i].addr = segs[i].ds_addr;
  269                         sg_list[i].len = segs[i].ds_len;
  270                         length += segs[i].ds_len;
  271                 }
  272                 command_struct->buffaddr =
  273                     (uint32_t)command->command_phys_addr + IPS_COMMAND_LEN;
  274                 command_struct->command = IPS_SG_WRITE_CMD;
  275         } else {
  276                 command_struct->buffaddr = segs[0].ds_addr;
  277                 length = segs[0].ds_len;
  278                 command_struct->segnum = 0;
  279                 command_struct->command = IPS_WRITE_CMD;
  280         }
  281 
  282         length = (length + IPS_BLKSIZE - 1) / IPS_BLKSIZE;
  283         command_struct->length = length;
  284         bus_dmamap_sync(sc->command_dmatag, command->command_dmamap,
  285             BUS_DMASYNC_PREWRITE);
  286         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  287             BUS_DMASYNC_PREWRITE);
  288 
  289         sc->ips_issue_cmd(command);
  290         sc->ips_poll_cmd(command);
  291         return;
  292 }
  293 
  294 static void 
  295 ipsd_dump_block_complete(ips_command_t *command)
  296 {
  297 
  298         if (COMMAND_ERROR(command))
  299                 printf("ipsd_dump completion error= 0x%x\n",
  300                     command->status.value);
  301 
  302         bus_dmamap_sync(command->data_dmatag, command->data_dmamap,
  303             BUS_DMASYNC_POSTWRITE);
  304         bus_dmamap_unload(command->data_dmatag, command->data_dmamap);
  305 }

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