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 1.4 2003/08/24 17:49:14 obrien $
  28  * $DragonFly: src/sys/dev/raid/ips/ips_ioctl.c,v 1.2 2004/07/09 16:15:27 dillon Exp $
  29  */
  30
  31 #include <sys/cdefs.h>
  32
  33 #include <dev/raid/ips/ips.h>
  34 #include <dev/raid/ips/ips_ioctl.h>
  35
  36 static void
  37 ips_ioctl_finish(ips_command_t *command)
  38 {
  39         ips_ioctl_t *ioctl_cmd = command->arg;
  40
  41         if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
  42                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  43                     BUS_DMASYNC_POSTREAD);
  44         } else if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
  45                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  46                     BUS_DMASYNC_POSTWRITE);
  47         }
  48         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
  49             BUS_DMASYNC_POSTWRITE);
  50         bus_dmamap_unload(ioctl_cmd->dmatag, ioctl_cmd->dmamap);
  51         ioctl_cmd->status.value = command->status.value;
  52         ips_insert_free_cmd(command->sc, command);
  53 }
  54
  55 static void
  56 ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,
  57     int segnum, int error)
  58 {
  59         ips_command_t *command;
  60         ips_ioctl_t *ioctl_cmd;
  61         ips_generic_cmd *command_buffer;
  62
  63         command = cmdptr;
  64         ioctl_cmd = command->arg;
  65         command_buffer = command->command_buffer;
  66         if (error) {
  67                 ioctl_cmd->status.value = IPS_ERROR_STATUS;
  68                 ips_insert_free_cmd(command->sc, command);
  69                 return;
  70         }
  71         command_buffer->id = command->id;
  72         command_buffer->buffaddr = segments[0].ds_addr;
  73         if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
  74                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  75                     BUS_DMASYNC_PREWRITE);
  76         } else if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
  77                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  78                     BUS_DMASYNC_PREREAD);
  79         }
  80         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
  81             BUS_DMASYNC_PREWRITE);
  82         command->sc->ips_issue_cmd(command);
  83 }
  84
  85 static int
  86 ips_ioctl_start(ips_command_t *command)
  87 {
  88         ips_ioctl_t *ioctl_cmd = command->arg;
  89
  90         memcpy(command->command_buffer, ioctl_cmd->command_buffer,
  91             sizeof(ips_generic_cmd));
  92         command->callback = ips_ioctl_finish;
  93         bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  94             ioctl_cmd->data_buffer, ioctl_cmd->datasize, ips_ioctl_callback,
  95             command, 0);
  96         return 0;
  97 }
  98
  99 static int
 100 ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd,
 101     ips_user_request *user_request)
 102 {
 103         int error = EINVAL;
 104
 105         if (bus_dma_tag_create(
 106                         /* parent    */ sc->adapter_dmatag,
 107                         /* alignment */ 1,
 108                         /* boundary  */ 0,
 109                         /* lowaddr   */ BUS_SPACE_MAXADDR_32BIT,
 110                         /* highaddr  */ BUS_SPACE_MAXADDR,
 111                         /* filter    */ NULL,
 112                         /* filterarg */ NULL,
 113                         /* maxsize   */ ioctl_cmd->datasize,
 114                         /* numsegs   */ 1,
 115                         /* maxsegsize*/ ioctl_cmd->datasize,
 116                         /* flags     */ 0,
 117                         &ioctl_cmd->dmatag) != 0) {
 118                 return ENOMEM;
 119         }
 120         if (bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer,
 121             0, &ioctl_cmd->dmamap)) {
 122                 error = ENOMEM;
 123                 goto exit;
 124         }
 125         if (copyin(user_request->data_buffer, ioctl_cmd->data_buffer,
 126             ioctl_cmd->datasize))
 127                 goto exit;
 128         ioctl_cmd->status.value = 0xffffffff;
 129         if ((error = ips_get_free_cmd(sc, ips_ioctl_start, ioctl_cmd, 0)) > 0) {
 130                 error = ENOMEM;
 131                 goto exit;
 132         }
 133         while (ioctl_cmd->status.value == 0xffffffff)
 134                 tsleep(ioctl_cmd, 0, "ips", hz / 10);
 135         if (COMMAND_ERROR(&ioctl_cmd->status))
 136                 error = EIO;
 137         else
 138                 error = 0;
 139         if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
 140             ioctl_cmd->datasize))
 141                 error = EINVAL;
 142 exit:
 143         bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
 144             ioctl_cmd->dmamap);
 145         bus_dma_tag_destroy(ioctl_cmd->dmatag);
 146         return error;
 147 }
 148
 149 int
 150 ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr,
 151     int32_t flags)
 152 {
 153         ips_ioctl_t *ioctl_cmd;
 154         ips_user_request *user_request;
 155         int error = EINVAL;
 156
 157         switch (ioctl_request) {
 158         case IPS_USER_CMD:
 159                 user_request = (ips_user_request *)addr;
 160                 ioctl_cmd = malloc(sizeof(ips_ioctl_t), M_DEVBUF, M_WAITOK);
 161                 ioctl_cmd->command_buffer = malloc(sizeof(ips_generic_cmd),
 162                     M_DEVBUF, M_WAITOK);
 163                 if (copyin(user_request->command_buffer,
 164                     ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) {
 165                         free(ioctl_cmd->command_buffer, M_DEVBUF);
 166                         free(ioctl_cmd, M_DEVBUF);
 167                         break;
 168                 }
 169                 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
 170                 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
 171                 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
 172                 free(ioctl_cmd->command_buffer, M_DEVBUF);
 173                 free(ioctl_cmd, M_DEVBUF);
 174                 break;
 175         }
 176         return error;
 177 }