sys/dev/raid/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  * $FreeBSD: src/sys/dev/ips/ips_ioctl.c,v 1.5 2004/05/30 04:01:29 scottl Exp $
  28  * $DragonFly: src/sys/dev/raid/ips/ips_ioctl.c,v 1.4 2004/09/06 16:39:47 joerg Exp $
  29  */
  30
  31 #include <dev/raid/ips/ips.h>
  32 #include <dev/raid/ips/ips_ioctl.h>
  33
  34 static void
  35 ips_ioctl_finish(ips_command_t *command)
  36 {
  37         ips_ioctl_t *ioctl_cmd = command->arg;
  38
  39         if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
  40                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  41                     BUS_DMASYNC_POSTREAD);
  42         } else if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
  43                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  44                     BUS_DMASYNC_POSTWRITE);
  45         }
  46         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
  47             BUS_DMASYNC_POSTWRITE);
  48         bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap);
  49         ioctl_cmd->status.value = command->status.value;
  50         ips_insert_free_cmd(command->sc, command);
  51 }
  52
  53 static void
  54 ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,
  55     int segnum, int error)
  56 {
  57         ips_command_t *command;
  58         ips_ioctl_t *ioctl_cmd;
  59         ips_generic_cmd *command_buffer;
  60
  61         command = cmdptr;
  62         ioctl_cmd = command->arg;
  63         command_buffer = command->command_buffer;
  64         if (error) {
  65                 ioctl_cmd->status.value = IPS_ERROR_STATUS;
  66                 ips_insert_free_cmd(command->sc, command);
  67                 return;
  68         }
  69         command_buffer->id = command->id;
  70         command_buffer->buffaddr = segments[0].ds_addr;
  71         if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
  72                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  73                     BUS_DMASYNC_PREWRITE);
  74         } else if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
  75                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  76                     BUS_DMASYNC_PREREAD);
  77         }
  78         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
  79             BUS_DMASYNC_PREWRITE);
  80         command->sc->ips_issue_cmd(command);
  81 }
  82
  83 static int
  84 ips_ioctl_start(ips_command_t *command)
  85 {
  86         ips_ioctl_t *ioctl_cmd = command->arg;
  87
  88         memcpy(command->command_buffer, ioctl_cmd->command_buffer,
  89             sizeof(ips_generic_cmd));
  90         command->callback = ips_ioctl_finish;
  91         bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  92             ioctl_cmd->data_buffer, ioctl_cmd->datasize, ips_ioctl_callback,
  93             command, 0);
  94         return 0;
  95 }
  96
  97 static int
  98 ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd,
  99     ips_user_request *user_request)
 100 {
 101         int error = EINVAL;
 102
 103         if (bus_dma_tag_create(
 104                         /* parent    */ sc->adapter_dmatag,
 105                         /* alignment */ 1,
 106                         /* boundary  */ 0,
 107                         /* lowaddr   */ BUS_SPACE_MAXADDR_32BIT,
 108                         /* highaddr  */ BUS_SPACE_MAXADDR,
 109                         /* filter    */ NULL,
 110                         /* filterarg */ NULL,
 111                         /* maxsize   */ ioctl_cmd->datasize,
 112                         /* numsegs   */ 1,
 113                         /* maxsegsize*/ ioctl_cmd->datasize,
 114                         /* flags     */ 0,
 115                         &ioctl_cmd->dmatag) != 0) {
 116                 return ENOMEM;
 117         }
 118         if (bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer,
 119             0, &ioctl_cmd->dmamap)) {
 120                 error = ENOMEM;
 121                 goto exit;
 122         }
 123         if (copyin(user_request->data_buffer, ioctl_cmd->data_buffer,
 124             ioctl_cmd->datasize))
 125                 goto exit;
 126         ioctl_cmd->status.value = 0xffffffff;
 127         if ((error = ips_get_free_cmd(sc, ips_ioctl_start, ioctl_cmd, 0)) > 0) {
 128                 error = ENOMEM;
 129                 goto exit;
 130         }
 131         while (ioctl_cmd->status.value == 0xffffffff)
 132                 tsleep(ioctl_cmd, 0, "ips", hz / 10);
 133         if (COMMAND_ERROR(&ioctl_cmd->status))
 134                 error = EIO;
 135         else
 136                 error = 0;
 137         if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
 138             ioctl_cmd->datasize))
 139                 error = EINVAL;
 140 exit:
 141         bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
 142             ioctl_cmd->dmamap);
 143         bus_dma_tag_destroy(ioctl_cmd->dmatag);
 144         return error;
 145 }
 146
 147 int
 148 ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr,
 149     int32_t flags)
 150 {
 151         ips_ioctl_t *ioctl_cmd;
 152         ips_user_request *user_request;
 153         int error = EINVAL;
 154
 155         switch (ioctl_request) {
 156         case IPS_USER_CMD:
 157                 user_request = (ips_user_request *)addr;
 158                 ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
 159                 ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
 160                     M_IPSBUF, M_WAITOK);
 161                 if (copyin(user_request->command_buffer,
 162                     ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) {
 163                         free(ioctl_cmd->command_buffer, M_IPSBUF);
 164                         free(ioctl_cmd, M_IPSBUF);
 165                         break;
 166                 }
 167                 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
 168                 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
 169                 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
 170                 free(ioctl_cmd->command_buffer, M_IPSBUF);
 171                 free(ioctl_cmd, M_IPSBUF);
 172                 break;
 173         }
 174         return error;
 175 }