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  */
  29
  30 #include <dev/raid/ips/ips.h>
  31 #include <dev/raid/ips/ips_ioctl.h>
  32
  33 static void
  34 ips_ioctl_finish(ips_command_t *command)
  35 {
  36         ips_ioctl_t *ioctl_cmd = command->arg;
  37
  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
  53 ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,
  54     int segnum, int error)
  55 {
  56         ips_command_t *command;
  57         ips_ioctl_t *ioctl_cmd;
  58         ips_generic_cmd *command_buffer;
  59
  60         command = cmdptr;
  61         ioctl_cmd = command->arg;
  62         command_buffer = command->command_buffer;
  63         if (error) {
  64                 ioctl_cmd->status.value = IPS_ERROR_STATUS;
  65                 ips_insert_free_cmd(command->sc, command);
  66                 return;
  67         }
  68         command_buffer->id = command->id;
  69         command_buffer->buffaddr = segments[0].ds_addr;
  70         if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
  71                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  72                     BUS_DMASYNC_PREWRITE);
  73         } else if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
  74                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  75                     BUS_DMASYNC_PREREAD);
  76         }
  77         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
  78             BUS_DMASYNC_PREWRITE);
  79         command->sc->ips_issue_cmd(command);
  80 }
  81
  82 static int
  83 ips_ioctl_start(ips_command_t *command)
  84 {
  85         ips_ioctl_t *ioctl_cmd = command->arg;
  86
  87         memcpy(command->command_buffer, ioctl_cmd->command_buffer,
  88             sizeof(ips_generic_cmd));
  89         command->callback = ips_ioctl_finish;
  90         bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  91             ioctl_cmd->data_buffer, ioctl_cmd->datasize, ips_ioctl_callback,
  92             command, 0);
  93         return 0;
  94 }
  95
  96 static int
  97 ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd,
  98     ips_user_request *user_request)
  99 {
 100         ips_command_t *command;
 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                         /* maxsize   */ ioctl_cmd->datasize,
 110                         /* numsegs   */ 1,
 111                         /* maxsegsize*/ ioctl_cmd->datasize,
 112                         /* flags     */ 0,
 113                         &ioctl_cmd->dmatag) != 0) {
 114                 return ENOMEM;
 115         }
 116         if (bus_dmamem_alloc(ioctl_cmd->dmatag, &ioctl_cmd->data_buffer,
 117             0, &ioctl_cmd->dmamap)) {
 118                 error = ENOMEM;
 119                 goto exit;
 120         }
 121         if (copyin(user_request->data_buffer, ioctl_cmd->data_buffer,
 122             ioctl_cmd->datasize))
 123                 goto exit;
 124         ioctl_cmd->status.value = 0xffffffff;
 125         lockmgr(&sc->queue_lock, LK_EXCLUSIVE|LK_RETRY);
 126         if ((error = ips_get_free_cmd(sc, &command, 0)) > 0) {
 127                 error = ENOMEM;
 128                 lockmgr(&sc->queue_lock, LK_RELEASE);
 129                 goto exit;
 130         }
 131         command->arg = ioctl_cmd;
 132         ips_ioctl_start(command);
 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         lockmgr(&sc->queue_lock, LK_RELEASE);
 140
 141         if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
 142             ioctl_cmd->datasize))
 143                 error = EINVAL;
 144 exit:
 145         bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
 146             ioctl_cmd->dmamap);
 147         bus_dma_tag_destroy(ioctl_cmd->dmatag);
 148         return error;
 149 }
 150
 151 int
 152 ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr,
 153     int32_t flags)
 154 {
 155         ips_ioctl_t *ioctl_cmd;
 156         ips_user_request *user_request;
 157         int error = EINVAL;
 158
 159         switch (ioctl_request) {
 160         case IPS_USER_CMD:
 161                 user_request = (ips_user_request *)addr;
 162                 ioctl_cmd = kmalloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
 163                 ioctl_cmd->command_buffer = kmalloc(sizeof(ips_generic_cmd),
 164                     M_IPSBUF, M_WAITOK);
 165                 if (copyin(user_request->command_buffer,
 166                     ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) {
 167                         kfree(ioctl_cmd->command_buffer, M_IPSBUF);
 168                         kfree(ioctl_cmd, M_IPSBUF);
 169                         break;
 170                 }
 171                 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
 172                 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
 173                 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
 174                 kfree(ioctl_cmd->command_buffer, M_IPSBUF);
 175                 kfree(ioctl_cmd, M_IPSBUF);
 176                 break;
 177         }
 178         return error;
 179 }