sys/dev/tdfx/tdfx_linux.c

   1 /*-
   2  * Copyright (c) 2006 The FreeBSD Project
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/file.h>
  32 #include <sys/kernel.h>
  33 #include <sys/module.h>
  34 #include <sys/proc.h>
  35 #include <sys/systm.h>
  36
  37 #include <dev/tdfx/tdfx_linux.h>
  38
  39 LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX);
  40
  41 /*
  42  * Linux emulation IOCTL for /dev/tdfx
  43  */
  44 static int
  45 linux_ioctl_tdfx(struct thread *td, struct linux_ioctl_args* args)
  46 {
  47    int error = 0;
  48    u_long cmd = args->cmd & 0xffff;
  49
  50    /* The structure passed to ioctl has two shorts, one int
  51       and one void*. */
  52    char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)];
  53
  54    struct file *fp;
  55
  56    if ((error = fget(td, args->fd, &fp)) != 0)
  57            return (error);
  58    /* We simply copy the data and send it right to ioctl */
  59    copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio));
  60    error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, td->td_ucred, td);
  61    fdrop(fp, td);
  62    return error;
  63 }
  64
  65 static int
  66 tdfx_linux_modevent(struct module *mod __unused, int what, void *arg __unused)
  67 {
  68
  69         switch (what) {
  70         case MOD_LOAD:
  71         case MOD_UNLOAD:
  72                 return (0);
  73         }
  74         return (EOPNOTSUPP);
  75 }
  76
  77 static moduledata_t tdfx_linux_mod = {
  78         "tdfx_linux",
  79         tdfx_linux_modevent,
  80         0
  81 };
  82
  83 /* As in SYSCALL_MODULE */
  84 DECLARE_MODULE(tdfx_linux, tdfx_linux_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
  85 MODULE_VERSION(tdfx_linux, 1);
  86 MODULE_DEPEND(tdfx_linux, tdfx, 1, 1, 1);
  87 MODULE_DEPEND(tdfx_linux, linux, 1, 1, 1);