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  * 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: head/sys/dev/ips/ips_ioctl.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_ioctl.h>
   36 
   37 static void ips_ioctl_finish(ips_command_t *command)
   38 {
   39         ips_ioctl_t *ioctl_cmd = command->arg;
   40         if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
   41                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   42                                 BUS_DMASYNC_POSTREAD);
   43         } else if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
   44                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   45                                 BUS_DMASYNC_POSTWRITE);
   46         }
   47         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 
   48                         BUS_DMASYNC_POSTWRITE);
   49         bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap);
   50         ioctl_cmd->status.value = command->status.value;
   51         ips_insert_free_cmd(command->sc, command);
   52 }
   53 
   54 static void ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,int segnum, int error)
   55 {
   56         ips_command_t *command = cmdptr;
   57         ips_ioctl_t *ioctl_cmd = command->arg;
   58         ips_generic_cmd *command_buffer = command->command_buffer;
   59         if(error){
   60                 ips_set_error(command, error);
   61                 return;
   62         }
   63         command_buffer->id = command->id;
   64         command_buffer->buffaddr = segments[0].ds_addr;
   65         if(ioctl_cmd->readwrite & IPS_IOCTL_WRITE){
   66                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   67                                 BUS_DMASYNC_PREWRITE);
   68         } else if(ioctl_cmd->readwrite & IPS_IOCTL_READ){
   69                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   70                                 BUS_DMASYNC_PREREAD);
   71         }
   72         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap, 
   73                         BUS_DMASYNC_PREWRITE);
   74         command->sc->ips_issue_cmd(command);
   75 }
   76 static int ips_ioctl_start(ips_command_t *command)
   77 {
   78         ips_ioctl_t *ioctl_cmd = command->arg;
   79         memcpy(command->command_buffer, ioctl_cmd->command_buffer,
   80                 sizeof(ips_generic_cmd));
   81         command->callback = ips_ioctl_finish;
   82         bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap, 
   83                         ioctl_cmd->data_buffer,ioctl_cmd->datasize, 
   84                         ips_ioctl_callback, command, 0);
   85         return 0;
   86 }
   87 
   88 static int ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd, ips_user_request *user_request)
   89 {
   90         ips_command_t *command;
   91         int error = EINVAL;
   92 
   93         if (bus_dma_tag_create( /* parent    */ sc->adapter_dmatag,
   94                         /* alignment */ 1,
   95                         /* boundary  */ 0,
   96                         /* lowaddr   */ BUS_SPACE_MAXADDR_32BIT,
   97                         /* highaddr  */ BUS_SPACE_MAXADDR,
   98                         /* filter    */ NULL,
   99                         /* filterarg */ NULL,
  100                         /* maxsize   */ ioctl_cmd->datasize,
  101                         /* numsegs   */ 1,
  102                         /* maxsegsize*/ ioctl_cmd->datasize,
  103                         /* flags     */ 0,
  104                         /* lockfunc  */ NULL,
  105                         /* lockarg   */ NULL,
  106                         &ioctl_cmd->dmatag) != 0) {
  107                 return ENOMEM;
  108         }
  109         if(bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer, 
  110            0, &ioctl_cmd->dmamap)){
  111                 error = ENOMEM;
  112                 goto exit;
  113         }
  114         if(copyin(user_request->data_buffer,ioctl_cmd->data_buffer, 
  115             ioctl_cmd->datasize))
  116                 goto exit;
  117         ioctl_cmd->status.value = 0xffffffff;
  118         mtx_lock(&sc->queue_mtx);
  119         if((error = ips_get_free_cmd(sc, &command, 0)) > 0){
  120                 error = ENOMEM;
  121                 mtx_unlock(&sc->queue_mtx);
  122                 goto exit;
  123         }
  124         command->arg = ioctl_cmd;
  125         ips_ioctl_start(command);
  126         while( ioctl_cmd->status.value == 0xffffffff)
  127                 msleep(ioctl_cmd, &sc->queue_mtx, 0, "ips", hz/10);
  128         if(COMMAND_ERROR(ioctl_cmd))
  129                 error = EIO;
  130         else
  131                 error = 0;
  132         mtx_unlock(&sc->queue_mtx);
  133         if(copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
  134             ioctl_cmd->datasize))
  135                 error = EINVAL;
  136         mtx_lock(&sc->queue_mtx);
  137         ips_insert_free_cmd(sc, command);
  138         mtx_unlock(&sc->queue_mtx);
  139 
  140 exit:   bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
  141                         ioctl_cmd->dmamap);
  142         bus_dma_tag_destroy(ioctl_cmd->dmatag);
  143         return error;
  144 }
  145 
  146 
  147 int ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr, int32_t flags){
  148         int error = EINVAL;
  149         ips_ioctl_t *ioctl_cmd;
  150         ips_user_request *user_request;
  151         switch(ioctl_request){
  152         case IPS_USER_CMD:
  153                 user_request = (ips_user_request *)addr;
  154                 ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
  155                 ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
  156                                                 M_IPSBUF, M_WAITOK);
  157                 if(copyin(user_request->command_buffer, 
  158                     ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))){
  159                         free(ioctl_cmd->command_buffer, M_IPSBUF);
  160                         free(ioctl_cmd, M_IPSBUF);
  161                         break;
  162                 }
  163                 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
  164                 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
  165                 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
  166                 free(ioctl_cmd->command_buffer, M_IPSBUF);
  167                 free(ioctl_cmd, M_IPSBUF);
  168                 break;
  169         }
  170 
  171         return error;
  172 } 

Cache object: 27b5899fbe4c28bbf286ed1f5c3d5dc8


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