The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/tdfx/tdfx_linux.c

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    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: releng/9.1/sys/dev/tdfx/tdfx_linux.c 224778 2011-08-11 12:30:23Z rwatson $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/capability.h>
   32 #include <sys/file.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/proc.h>
   36 #include <sys/systm.h>
   37 
   38 #include <dev/tdfx/tdfx_linux.h>
   39 
   40 LINUX_IOCTL_SET(tdfx, LINUX_IOCTL_TDFX_MIN, LINUX_IOCTL_TDFX_MAX);
   41 
   42 /*
   43  * Linux emulation IOCTL for /dev/tdfx
   44  */
   45 static int
   46 linux_ioctl_tdfx(struct thread *td, struct linux_ioctl_args* args)
   47 {
   48    int error = 0;
   49    u_long cmd = args->cmd & 0xffff;
   50 
   51    /* The structure passed to ioctl has two shorts, one int
   52       and one void*. */
   53    char d_pio[2*sizeof(short) + sizeof(int) + sizeof(void*)];
   54 
   55    struct file *fp;
   56 
   57    if ((error = fget(td, args->fd, CAP_IOCTL, &fp)) != 0)
   58            return (error);
   59    /* We simply copy the data and send it right to ioctl */
   60    copyin((caddr_t)args->arg, &d_pio, sizeof(d_pio));
   61    error = fo_ioctl(fp, cmd, (caddr_t)&d_pio, td->td_ucred, td);
   62    fdrop(fp, td);
   63    return error;
   64 }
   65 
   66 static int
   67 tdfx_linux_modevent(struct module *mod __unused, int what, void *arg __unused)
   68 {
   69 
   70         switch (what) {
   71         case MOD_LOAD:
   72         case MOD_UNLOAD:
   73                 return (0);
   74         }
   75         return (EOPNOTSUPP);
   76 }
   77 
   78 static moduledata_t tdfx_linux_mod = {
   79         "tdfx_linux",
   80         tdfx_linux_modevent,
   81         0
   82 };
   83 
   84 /* As in SYSCALL_MODULE */
   85 DECLARE_MODULE(tdfx_linux, tdfx_linux_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
   86 MODULE_VERSION(tdfx_linux, 1);
   87 MODULE_DEPEND(tdfx_linux, tdfx, 1, 1, 1);
   88 MODULE_DEPEND(tdfx_linux, linux, 1, 1, 1);

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