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/mfi/mfi_linux.c

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    1 /*-
    2  * Copyright (c) 2006 IronPort Systems
    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/systm.h>
   32 #include <sys/conf.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/file.h>
   36 #include <sys/proc.h>
   37 
   38 #if defined(__amd64__) /* Assume amd64 wants 32 bit Linux */
   39 #include <machine/../linux32/linux.h>
   40 #include <machine/../linux32/linux32_proto.h>
   41 #else
   42 #include <machine/../linux/linux.h>
   43 #include <machine/../linux/linux_proto.h>
   44 #endif
   45 #include <compat/linux/linux_ioctl.h>
   46 #include <compat/linux/linux_util.h>
   47 
   48 #include <dev/mfi/mfireg.h>
   49 #include <dev/mfi/mfi_ioctl.h>
   50 
   51 /* There are multiple ioctl number ranges that need to be handled */
   52 #define MFI_LINUX_IOCTL_MIN  0x4d00
   53 #define MFI_LINUX_IOCTL_MAX  0x4d04
   54 
   55 static linux_ioctl_function_t mfi_linux_ioctl;
   56 static struct linux_ioctl_handler mfi_linux_handler = {mfi_linux_ioctl,
   57                                                        MFI_LINUX_IOCTL_MIN,
   58                                                        MFI_LINUX_IOCTL_MAX};
   59 
   60 SYSINIT  (mfi_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
   61           linux_ioctl_register_handler, &mfi_linux_handler);
   62 SYSUNINIT(mfi_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
   63           linux_ioctl_unregister_handler, &mfi_linux_handler);
   64 
   65 static struct linux_device_handler mfi_device_handler =
   66         { "mfi", "megaraid_sas", "mfi0", "megaraid_sas_ioctl_node", -1, 0, 1};
   67 
   68 SYSINIT  (mfi_register2,   SI_SUB_KLD, SI_ORDER_MIDDLE,
   69           linux_device_register_handler, &mfi_device_handler);
   70 SYSUNINIT(mfi_unregister2, SI_SUB_KLD, SI_ORDER_MIDDLE,
   71           linux_device_unregister_handler, &mfi_device_handler);
   72 
   73 static int
   74 mfi_linux_modevent(module_t mod, int cmd, void *data)
   75 {
   76         return (0);
   77 }
   78 
   79 DEV_MODULE(mfi_linux, mfi_linux_modevent, NULL);
   80 MODULE_DEPEND(mfi, linux, 1, 1, 1);
   81 
   82 static int
   83 mfi_linux_ioctl(d_thread_t *p, struct linux_ioctl_args *args)
   84 {
   85         struct file *fp;
   86         int error;
   87         u_long cmd = args->cmd;
   88 
   89         switch (cmd) {
   90         case MFI_LINUX_CMD:
   91                 cmd = MFI_LINUX_CMD_2;
   92                 break;
   93         case MFI_LINUX_SET_AEN:
   94                 cmd = MFI_LINUX_SET_AEN_2;
   95                 break;
   96         }
   97 
   98         if ((error = fget(p, args->fd, &fp)) != 0)
   99                 return (error);
  100         error = fo_ioctl(fp, cmd, (caddr_t)args->arg, p->td_ucred, p);
  101         fdrop(fp, p);
  102         return (error);
  103 }

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