sys/dev/ips/ips_ioctl.c

   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("$FreeBSD$");
  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 }