FreeBSD/Linux Kernel Cross Reference
sys/dev/mrsas/mrsas_linux.c

     /*
      * Copyright (c) 2015, AVAGO Tech. All rights reserved. Author: Kashyap Desai,
      * Copyright (c) 2014, LSI Corp. All rights reserved. Author: Kashyap Desai,
      * Sibananda Sahu Support: freebsdraid@avagotech.com
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions are
      * met:
      *
     * 1. Redistributions of source code must retain the above copyright notice,
     * this list of conditions and the following disclaimer. 2. Redistributions
     * in binary form must reproduce the above copyright notice, this list of
     * conditions and the following disclaimer in the documentation and/or other
     * materials provided with the distribution. 3. Neither the name of the
     * <ORGANIZATION> nor the names of its contributors may be used to endorse or
     * promote products derived from this software without specific prior written
     * permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
     * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     *
     * The views and conclusions contained in the software and documentation are
     * those of the authors and should not be interpreted as representing
     * official policies,either expressed or implied, of the FreeBSD Project.
     *
     * Send feedback to: <megaraidfbsd@avagotech.com> Mail to: AVAGO TECHNOLOGIES, 1621
     * Barber Lane, Milpitas, CA 95035 ATTN: MegaRaid FreeBSD
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    
    #if (__FreeBSD_version >= 1001511)
    #include <sys/capsicum.h>
    #elif (__FreeBSD_version > 900000)
    #include <sys/capability.h>
    #endif
    
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/file.h>
    #include <sys/proc.h>
    #include <machine/bus.h>
    
    #if defined(__amd64__)                  /* Assume amd64 wants 32 bit Linux */
    #include <machine/../linux32/linux.h>
    #include <machine/../linux32/linux32_proto.h>
    #else
    #include <machine/../linux/linux.h>
    #include <machine/../linux/linux_proto.h>
    #endif
    #include <compat/linux/linux_ioctl.h>
    #include <compat/linux/linux_util.h>
    
    #include <dev/mrsas/mrsas.h>
    #undef COMPAT_FREEBSD32
    #include <dev/mrsas/mrsas_ioctl.h>
    
    /* There are multiple ioctl number ranges that need to be handled */
    #define MRSAS_LINUX_IOCTL_MIN  0x4d00
    #define MRSAS_LINUX_IOCTL_MAX  0x4d01
    
    static linux_ioctl_function_t mrsas_linux_ioctl;
    static struct linux_ioctl_handler mrsas_linux_handler = {mrsas_linux_ioctl,
            MRSAS_LINUX_IOCTL_MIN,
    MRSAS_LINUX_IOCTL_MAX};
    
    SYSINIT(mrsas_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
        linux_ioctl_register_handler, &mrsas_linux_handler);
    SYSUNINIT(mrsas_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
        linux_ioctl_unregister_handler, &mrsas_linux_handler);
    
    static struct linux_device_handler mrsas_device_handler =
    {"mrsas", "megaraid_sas", "mrsas0", "megaraid_sas_ioctl_node", -1, 0, 1};
    
    SYSINIT(mrsas_register2, SI_SUB_KLD, SI_ORDER_MIDDLE,
        linux_device_register_handler, &mrsas_device_handler);
    SYSUNINIT(mrsas_unregister2, SI_SUB_KLD, SI_ORDER_MIDDLE,
        linux_device_unregister_handler, &mrsas_device_handler);
    
    static int
    mrsas_linux_modevent(module_t mod __unused, int cmd __unused, void *data __unused)
    {
            return (0);
    }
   
   /*
    * mrsas_linux_ioctl:   linux emulator IOCtl commands entry point.
    *
    * This function is the entry point for IOCtls from linux binaries.
    * It calls the mrsas_ioctl function for processing
    * depending on the IOCTL command received.
    */
   static int
   mrsas_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
   {
   #if (__FreeBSD_version >= 1000000)
           cap_rights_t rights;
   
   #endif
           struct file *fp;
           int error;
           u_long cmd = args->cmd;
   
           if (cmd != MRSAS_LINUX_CMD32) {
                   error = ENOTSUP;
                   goto END;
           }
   #if (__FreeBSD_version >= 1000000)
           error = fget(p, args->fd, cap_rights_init_one(&rights, CAP_IOCTL), &fp);
   #elif (__FreeBSD_version <= 900000)
           error = fget(p, args->fd, &fp);
   #else                                   /* For FreeBSD version greater than
                                            * 9.0.0 but less than 10.0.0 */
           error = fget(p, args->fd, CAP_IOCTL, &fp);
   #endif
           if (error != 0)
                   goto END;
   
           error = fo_ioctl(fp, cmd, (caddr_t)args->arg, p->td_ucred, p);
           fdrop(fp, p);
   END:
           return (error);
   }
   
   DEV_MODULE(mrsas_linux, mrsas_linux_modevent, NULL);
   MODULE_DEPEND(mrsas, linux, 1, 1, 1);

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