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/xen/xenmem/xenmem_if.m

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    1 #-
    2 # Copyright (c) 2015 Roger Pau Monné <royger@FreeBSD.org>
    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 # $FreeBSD: releng/12.0/sys/xen/xenmem/xenmem_if.m 282634 2015-05-08 14:48:40Z royger $
   27 #
   28 
   29 #include <sys/bus.h>
   30 
   31 INTERFACE xenmem;
   32 
   33 #
   34 # Default implementations of some methods.
   35 #
   36 CODE {
   37         static struct resource *
   38         xenmem_generic_alloc(device_t dev, device_t child, int *res_id,
   39             size_t size)
   40         {
   41                 device_t parent;
   42 
   43                 parent = device_get_parent(dev);
   44                 if (parent == NULL)
   45                         return (NULL);
   46                 return (XENMEM_ALLOC(parent, child, res_id, size));
   47         }
   48 
   49         static int
   50         xenmem_generic_free(device_t dev, device_t child, int res_id,
   51             struct resource *res)
   52         {
   53                 device_t parent;
   54 
   55                 parent = device_get_parent(dev);
   56                 if (parent == NULL)
   57                         return (ENXIO);
   58                 return (XENMEM_FREE(parent, child, res_id, res));
   59         }
   60 };
   61 
   62 /**
   63  * @brief Request for unused physical memory regions.
   64  *
   65  * @param _dev          the device whose child was being probed.
   66  * @param _child        the child device which failed to probe.
   67  * @param _res_id       a pointer to the resource identifier.
   68  * @param _size         size of the required memory region.
   69  *
   70  * @returns             the resource which was allocated or @c NULL if no
   71  *                      resource could be allocated.
   72  */
   73 METHOD struct resource * alloc {
   74         device_t                _dev;
   75         device_t                _child;
   76         int                    *_res_id;
   77         size_t                  _size;
   78 } DEFAULT xenmem_generic_alloc;
   79 
   80 /**
   81  * @brief Free physical memory regions.
   82  *
   83  * @param _dev          the device whose child was being probed.
   84  * @param _child        the child device which failed to probe.
   85  * @param _res_id       the resource identifier.
   86  * @param _res          the resource.
   87  *
   88  * @returns             0 on success, otherwise an error code.
   89  */
   90 METHOD int free {
   91         device_t                _dev;
   92         device_t                _child;
   93         int                     _res_id;
   94         struct resource        *_res;
   95 } DEFAULT xenmem_generic_free;

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