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 1.8 2006/09/05 03:48:11 dillon Exp $
  29  */
  30
  31 #include <dev/raid/ips/ips.h>
  32 #include <dev/raid/ips/ips_ioctl.h>
  33 #include <sys/thread2.h>
  34
  35 static void
  36 ips_ioctl_finish(ips_command_t *command)
  37 {
  38         ips_ioctl_t *ioctl_cmd = command->arg;
  39
  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
  55 ips_ioctl_callback(void *cmdptr, bus_dma_segment_t *segments,
  56     int segnum, int error)
  57 {
  58         ips_command_t *command;
  59         ips_ioctl_t *ioctl_cmd;
  60         ips_generic_cmd *command_buffer;
  61
  62         command = cmdptr;
  63         ioctl_cmd = command->arg;
  64         command_buffer = command->command_buffer;
  65         if (error) {
  66                 ioctl_cmd->status.value = IPS_ERROR_STATUS;
  67                 ips_insert_free_cmd(command->sc, command);
  68                 return;
  69         }
  70         command_buffer->id = command->id;
  71         command_buffer->buffaddr = segments[0].ds_addr;
  72         if (ioctl_cmd->readwrite & IPS_IOCTL_WRITE) {
  73                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  74                     BUS_DMASYNC_PREWRITE);
  75         } else if (ioctl_cmd->readwrite & IPS_IOCTL_READ) {
  76                 bus_dmamap_sync(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  77                     BUS_DMASYNC_PREREAD);
  78         }
  79         bus_dmamap_sync(command->sc->command_dmatag, command->command_dmamap,
  80             BUS_DMASYNC_PREWRITE);
  81         command->sc->ips_issue_cmd(command);
  82 }
  83
  84 static int
  85 ips_ioctl_start(ips_command_t *command)
  86 {
  87         ips_ioctl_t *ioctl_cmd = command->arg;
  88
  89         memcpy(command->command_buffer, ioctl_cmd->command_buffer,
  90             sizeof(ips_generic_cmd));
  91         command->callback = ips_ioctl_finish;
  92         bus_dmamap_load(ioctl_cmd->dmatag, ioctl_cmd->dmamap,
  93             ioctl_cmd->data_buffer, ioctl_cmd->datasize, ips_ioctl_callback,
  94             command, 0);
  95         return 0;
  96 }
  97
  98 static int
  99 ips_ioctl_cmd(ips_softc_t *sc, ips_ioctl_t *ioctl_cmd,
 100     ips_user_request *user_request)
 101 {
 102         ips_command_t *command;
 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         lockmgr(&sc->queue_lock, LK_EXCLUSIVE|LK_RETRY);
 130         if ((error = ips_get_free_cmd(sc, &command, 0)) > 0) {
 131                 error = ENOMEM;
 132                 lockmgr(&sc->queue_lock, LK_RELEASE);
 133                 goto exit;
 134         }
 135         command->arg = ioctl_cmd;
 136         ips_ioctl_start(command);
 137         while (ioctl_cmd->status.value == 0xffffffff)
 138                 tsleep(ioctl_cmd, 0, "ips", hz / 10);
 139         if (COMMAND_ERROR(&ioctl_cmd->status))
 140                 error = EIO;
 141         else
 142                 error = 0;
 143         lockmgr(&sc->queue_lock, LK_RELEASE);
 144
 145         if (copyout(ioctl_cmd->data_buffer, user_request->data_buffer,
 146             ioctl_cmd->datasize))
 147                 error = EINVAL;
 148 exit:
 149         bus_dmamem_free(ioctl_cmd->dmatag, ioctl_cmd->data_buffer,
 150             ioctl_cmd->dmamap);
 151         bus_dma_tag_destroy(ioctl_cmd->dmatag);
 152         return error;
 153 }
 154
 155 int
 156 ips_ioctl_request(ips_softc_t *sc, u_long ioctl_request, caddr_t addr,
 157     int32_t flags)
 158 {
 159         ips_ioctl_t *ioctl_cmd;
 160         ips_user_request *user_request;
 161         int error = EINVAL;
 162
 163         switch (ioctl_request) {
 164         case IPS_USER_CMD:
 165                 user_request = (ips_user_request *)addr;
 166                 ioctl_cmd = kmalloc(sizeof(ips_ioctl_t), M_IPSBUF, M_WAITOK);
 167                 ioctl_cmd->command_buffer = kmalloc(sizeof(ips_generic_cmd),
 168                     M_IPSBUF, M_WAITOK);
 169                 if (copyin(user_request->command_buffer,
 170                     ioctl_cmd->command_buffer, sizeof(ips_generic_cmd))) {
 171                         kfree(ioctl_cmd->command_buffer, M_IPSBUF);
 172                         kfree(ioctl_cmd, M_IPSBUF);
 173                         break;
 174                 }
 175                 ioctl_cmd->readwrite = IPS_IOCTL_READ | IPS_IOCTL_WRITE;
 176                 ioctl_cmd->datasize = IPS_IOCTL_BUFFER_SIZE;
 177                 error = ips_ioctl_cmd(sc, ioctl_cmd, user_request);
 178                 kfree(ioctl_cmd->command_buffer, M_IPSBUF);
 179                 kfree(ioctl_cmd, M_IPSBUF);
 180                 break;
 181         }
 182         return error;
 183 }