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/5.2/sys/dev/ips/ips_ioctl.c 119418 2003-08-24 17:55:58Z obrien $");
   30 
   31 #include <dev/ips/ips.h>
   32 #include <dev/ips/ips_ioctl.h>
   33 
   34 static void ips_ioctl_finish(ips_command_t *command)
   35 {
   36         ips_ioctl_t *ioctl_cmd = command->arg;
   37         if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
   38                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   39                                 BUS_DMASYNC_POSTREAD);
   40         } else if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
   41                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   42                                 BUS_DMASYNC_POSTWRITE);
   43         }
   44         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 
   45                         BUS_DMASYNC_POSTWRITE);
   46         bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap);
   47         ioctl_cmd->status.value = command->status.value;
   48         ips_insert_free_cmd(command->sc, command);
   49 }
   50 
   51 static void ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,int segnum, int error)
   52 {
   53         ips_command_t *command = cmdptr;
   54         ips_ioctl_t *ioctl_cmd = command->arg;
   55         ips_generic_cmd *command_buffer = command->command_buffer;
   56         if(error){
   57                 ioctl_cmd->status.value = IPS_ERROR_STATUS;
   58                 ips_insert_free_cmd(command->sc, command);
   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         int error = EINVAL;
   89 
   90         if (bus_dma_tag_create( /* parent    */ sc->adapter_dmatag,
   91                         /* alignment */ 1,
   92                         /* boundary  */ 0,
   93                         /* lowaddr   */ BUS_SPACE_MAXADDR_32BIT,
   94                         /* highaddr  */ BUS_SPACE_MAXADDR,
   95                         /* filter    */ NULL,
   96                         /* filterarg */ NULL,
   97                         /* maxsize   */ ioctl_cmd->datasize,
   98                         /* numsegs   */ 1,
   99                         /* maxsegsize*/ ioctl_cmd->datasize,
  100                         /* flags     */ 0,
  101                         /* lockfunc  */ busdma_lock_mutex,
  102                         /* lockarg   */ &Giant,
  103                         &ioctl_cmd->dmatag) != 0) {
  104                 return ENOMEM;
  105         }
  106         if(bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer, 
  107            0, &ioctl_cmd->dmamap)){
  108                 error = ENOMEM;
  109                 goto exit;
  110         }
  111         if(copyin(user_request->data_buffer,ioctl_cmd->data_buffer, 
  112             ioctl_cmd->datasize))
  113                 goto exit;
  114         ioctl_cmd->status.value = 0xffffffff;
  115         if((error = ips_get_free_cmd(sc, ips_ioctl_start, ioctl_cmd,0)) > 0){
  116                 error = ENOMEM;
  117                 goto exit;
  118         }
  119         while( ioctl_cmd->status.value == 0xffffffff)
  120                 tsleep(ioctl_cmd, 0, "ips", hz/10);
  121         if(COMMAND_ERROR(&ioctl_cmd->status))
  122                 error = EIO;
  123         else
  124                 error = 0;
  125         if(copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
  126             ioctl_cmd->datasize))
  127                 error = EINVAL;
  128 exit:   bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
  129                         ioctl_cmd->dmamap);
  130         bus_dma_tag_destroy(ioctl_cmd->dmatag);
  131         return error;
  132 }
  133 
  134 
  135 int ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, int32_t flags){
  136         int error = EINVAL;
  137         ips_ioctl_t *ioctl_cmd;
  138         ips_user_request *user_request;
  139         switch(ioctl_request){
  140         case IPS_USER_CMD:
  141                 user_request = (ips_user_request *)addr;
  142                 ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_DEVBUF, M_WAITOK);
  143                 ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
  144                                                 M_DEVBUF, M_WAITOK);
  145                 if(copyin(user_request->command_buffer, 
  146                     ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))){
  147                         free(ioctl_cmd->command_buffer, M_DEVBUF);
  148                         free(ioctl_cmd, M_DEVBUF);
  149                         break;
  150                 }
  151                 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
  152                 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
  153                 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
  154                 free(ioctl_cmd->command_buffer, M_DEVBUF);
  155                 free(ioctl_cmd, M_DEVBUF);
  156                 break;
  157         }
  158 
  159         return error;
  160 } 

Cache object: c74b0a828d92c7475187396bb02deb0f


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