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_ioctl.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/9.2/sys/dev/ips/ips_ioctl.c 152919 2005-11-29 09:39:41Z scottl $");
   30 
   31 #include <dev/ips/ipsreg.h>
   32 #include <dev/ips/ips.h>
   33 #include <dev/ips/ips_ioctl.h>
   34 
   35 static void ips_ioctl_finish(ips_command_t *command)
   36 {
   37         ips_ioctl_t *ioctl_cmd = command->arg;
   38         if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
   39                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   40                                 BUS_DMASYNC_POSTREAD);
   41         } else if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
   42                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   43                                 BUS_DMASYNC_POSTWRITE);
   44         }
   45         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 
   46                         BUS_DMASYNC_POSTWRITE);
   47         bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap);
   48         ioctl_cmd->status.value = command->status.value;
   49         ips_insert_free_cmd(command->sc, command);
   50 }
   51 
   52 static void ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,int segnum, int error)
   53 {
   54         ips_command_t *command = cmdptr;
   55         ips_ioctl_t *ioctl_cmd = command->arg;
   56         ips_generic_cmd *command_buffer = command->command_buffer;
   57         if(error){
   58                 ips_set_error(command, error);
   59                 return;
   60         }
   61         command_buffer->id = command->id;
   62         command_buffer->buffaddr = segments[0].ds_addr;
   63         if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
   64                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   65                                 BUS_DMASYNC_PREWRITE);
   66         } else if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
   67                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   68                                 BUS_DMASYNC_PREREAD);
   69         }
   70         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 
   71                         BUS_DMASYNC_PREWRITE);
   72         command->sc->ips_issue_cmd(command);
   73 }
   74 static int ips_ioctl_start(ips_command_t *command)
   75 {
   76         ips_ioctl_t *ioctl_cmd = command->arg;
   77         memcpy(command->command_buffer, ioctl_cmd->command_buffer,
   78                 sizeof(ips_generic_cmd));
   79         command->callback = ips_ioctl_finish;
   80         bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   81                         ioctl_cmd->data_buffer,ioctl_cmd->datasize, 
   82                         ips_ioctl_callback, command, 0);
   83         return 0;
   84 }
   85 
   86 static int ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd, ips_user_request *user_request)
   87 {
   88         ips_command_t *command;
   89         int error = EINVAL;
   90 
   91         if (bus_dma_tag_create( /* parent    */ sc->adapter_dmatag,
   92                         /* alignment */ 1,
   93                         /* boundary  */ 0,
   94                         /* lowaddr   */ BUS_SPACE_MAXADDR_32BIT,
   95                         /* highaddr  */ BUS_SPACE_MAXADDR,
   96                         /* filter    */ NULL,
   97                         /* filterarg */ NULL,
   98                         /* maxsize   */ ioctl_cmd->datasize,
   99                         /* numsegs   */ 1,
  100                         /* maxsegsize*/ ioctl_cmd->datasize,
  101                         /* flags     */ 0,
  102                         /* lockfunc  */ NULL,
  103                         /* lockarg   */ NULL,
  104                         &ioctl_cmd->dmatag) != 0) {
  105                 return ENOMEM;
  106         }
  107         if(bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer, 
  108            0, &ioctl_cmd->dmamap)){
  109                 error = ENOMEM;
  110                 goto exit;
  111         }
  112         if(copyin(user_request->data_buffer,ioctl_cmd->data_buffer, 
  113             ioctl_cmd->datasize))
  114                 goto exit;
  115         ioctl_cmd->status.value = 0xffffffff;
  116         mtx_lock(&sc->queue_mtx);
  117         if((error = ips_get_free_cmd(sc, &command, 0)) > 0){
  118                 error = ENOMEM;
  119                 mtx_unlock(&sc->queue_mtx);
  120                 goto exit;
  121         }
  122         command->arg = ioctl_cmd;
  123         ips_ioctl_start(command);
  124         while( ioctl_cmd->status.value == 0xffffffff)
  125                 msleep(ioctl_cmd, &sc->queue_mtx, 0, "ips", hz/10);
  126         if(COMMAND_ERROR(ioctl_cmd))
  127                 error = EIO;
  128         else
  129                 error = 0;
  130         mtx_unlock(&sc->queue_mtx);
  131         if(copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
  132             ioctl_cmd->datasize))
  133                 error = EINVAL;
  134         mtx_lock(&sc->queue_mtx);
  135         ips_insert_free_cmd(sc, command);
  136         mtx_unlock(&sc->queue_mtx);
  137 
  138 exit:   bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
  139                         ioctl_cmd->dmamap);
  140         bus_dma_tag_destroy(ioctl_cmd->dmatag);
  141         return error;
  142 }
  143 
  144 
  145 int ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, int32_t flags){
  146         int error = EINVAL;
  147         ips_ioctl_t *ioctl_cmd;
  148         ips_user_request *user_request;
  149         switch(ioctl_request){
  150         case IPS_USER_CMD:
  151                 user_request = (ips_user_request *)addr;
  152                 ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
  153                 ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
  154                                                 M_IPSBUF, M_WAITOK);
  155                 if(copyin(user_request->command_buffer, 
  156                     ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))){
  157                         free(ioctl_cmd->command_buffer, M_IPSBUF);
  158                         free(ioctl_cmd, M_IPSBUF);
  159                         break;
  160                 }
  161                 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
  162                 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
  163                 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
  164                 free(ioctl_cmd->command_buffer, M_IPSBUF);
  165                 free(ioctl_cmd, M_IPSBUF);
  166                 break;
  167         }
  168 
  169         return error;
  170 } 

Cache object: a7bd449be268a8df4874a561e65e824f


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