FreeBSD/Linux Kernel Cross Reference
sys/dev/ips/ips_ioctl.c

     /*-
      * Written by: David Jeffery
      * Copyright (c) 2002 Adaptec Inc.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #include <dev/ips/ips.h>
    #include <dev/ips/ips_ioctl.h>
    
    static void ips_ioctl_finish(ips_command_t *command)
    {
            ips_ioctl_t *ioctl_cmd = command->arg;
            if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
                    bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
                                    BUS_DMASYNC_POSTREAD);
            } else if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
                    bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
                                    BUS_DMASYNC_POSTWRITE);
            }
            bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 
                            BUS_DMASYNC_POSTWRITE);
            bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap);
            ioctl_cmd->status.value = command->status.value;
            ips_insert_free_cmd(command->sc, command);
    }
    
    static void ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,int segnum, int error)
    {
            ips_command_t *command = cmdptr;
            ips_ioctl_t *ioctl_cmd = command->arg;
            ips_generic_cmd *command_buffer = command->command_buffer;
            if(error){
                    ioctl_cmd->status.value = IPS_ERROR_STATUS;
                    ips_insert_free_cmd(command->sc, command);
                    return;
            }
            command_buffer->id = command->id;
            command_buffer->buffaddr = segments[0].ds_addr;
            if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
                    bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
                                    BUS_DMASYNC_PREWRITE);
            } else if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
                    bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
                                    BUS_DMASYNC_PREREAD);
            }
            bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 
                            BUS_DMASYNC_PREWRITE);
            command->sc->ips_issue_cmd(command);
    }
    static int ips_ioctl_start(ips_command_t *command)
    {
            ips_ioctl_t *ioctl_cmd = command->arg;
            memcpy(command->command_buffer, ioctl_cmd->command_buffer,
                    sizeof(ips_generic_cmd));
            command->callback = ips_ioctl_finish;
            bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
                            ioctl_cmd->data_buffer,ioctl_cmd->datasize, 
                            ips_ioctl_callback, command, 0);
            return 0;
    }
    
    static int ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd, ips_user_request *user_request)
    {
            int error = EINVAL;
    
            if (bus_dma_tag_create( /* parent    */ sc->adapter_dmatag,
                            /* alignment */ 1,
                            /* boundary  */ 0,
                            /* lowaddr   */ BUS_SPACE_MAXADDR_32BIT,
                            /* highaddr  */ BUS_SPACE_MAXADDR,
                            /* filter    */ NULL,
                            /* filterarg */ NULL,
                            /* maxsize   */ ioctl_cmd->datasize,
                            /* numsegs   */ 1,
                            /* maxsegsize*/ ioctl_cmd->datasize,
                            /* flags     */ 0,
                           &ioctl_cmd->dmatag) != 0) {
                   return ENOMEM;
           }
           if(bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer, 
              0, &ioctl_cmd->dmamap)){
                   error = ENOMEM;
                   goto exit;
           }
           if(copyin(user_request->data_buffer,ioctl_cmd->data_buffer, 
               ioctl_cmd->datasize))
                   goto exit;
           ioctl_cmd->status.value = 0xffffffff;
           if((error = ips_get_free_cmd(sc, ips_ioctl_start, ioctl_cmd,0)) > 0){
                   error = ENOMEM;
                   goto exit;
           }
           while( ioctl_cmd->status.value == 0xffffffff)
                   tsleep(ioctl_cmd, 0, "ips", hz/10);
           if(COMMAND_ERROR(&ioctl_cmd->status))
                   error = EIO;
           else
                   error = 0;
           if(copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
               ioctl_cmd->datasize))
                   error = EINVAL;
   exit:   bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
                           ioctl_cmd->dmamap);
           bus_dma_tag_destroy(ioctl_cmd->dmatag);
           return error;
   }
   
   
   int ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, int32_t flags){
           int error = EINVAL;
           ips_ioctl_t *ioctl_cmd;
           ips_user_request *user_request;
           switch(ioctl_request){
           case IPS_USER_CMD:
                   user_request = (ips_user_request *)addr;
                   ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
                   ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
                                                   M_IPSBUF, M_WAITOK);
                   if(copyin(user_request->command_buffer, 
                       ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))){
                           free(ioctl_cmd->command_buffer, M_IPSBUF);
                           free(ioctl_cmd, M_IPSBUF);
                           break;
                   }
                   ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
                   ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
                   error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
                   free(ioctl_cmd->command_buffer, M_IPSBUF);
                   free(ioctl_cmd, M_IPSBUF);
                   break;
           }
   
           return error;
   } 

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