sys/dev/ips/ips_ioctl.c

   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("$FreeBSD$");
  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 }