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/sys/rman.h

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    1 /*-
    2  * Copyright 1998 Massachusetts Institute of Technology
    3  *
    4  * Permission to use, copy, modify, and distribute this software and
    5  * its documentation for any purpose and without fee is hereby
    6  * granted, provided that both the above copyright notice and this
    7  * permission notice appear in all copies, that both the above
    8  * copyright notice and this permission notice appear in all
    9  * supporting documentation, and that the name of M.I.T. not be used
   10  * in advertising or publicity pertaining to distribution of the
   11  * software without specific, written prior permission.  M.I.T. makes
   12  * no representations about the suitability of this software for any
   13  * purpose.  It is provided "as is" without express or implied
   14  * warranty.
   15  * 
   16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
   17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
   18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
   20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: releng/8.1/sys/sys/rman.h 199583 2009-11-20 15:27:52Z jhb $
   30  */
   31 
   32 #ifndef _SYS_RMAN_H_
   33 #define _SYS_RMAN_H_    1
   34 
   35 #ifndef _KERNEL
   36 #include <sys/queue.h>
   37 #else
   38 #include <machine/_bus.h>
   39 #include <machine/resource.h>
   40 #endif
   41 
   42 #define RF_ALLOCATED    0x0001  /* resource has been reserved */
   43 #define RF_ACTIVE       0x0002  /* resource allocation has been activated */
   44 #define RF_SHAREABLE    0x0004  /* resource permits contemporaneous sharing */
   45 #define RF_TIMESHARE    0x0008  /* resource permits time-division sharing */
   46 #define RF_WANTED       0x0010  /* somebody is waiting for this resource */
   47 #define RF_FIRSTSHARE   0x0020  /* first in sharing list */
   48 #define RF_PREFETCHABLE 0x0040  /* resource is prefetchable */
   49 #define RF_OPTIONAL     0x0080  /* for bus_alloc_resources() */
   50 
   51 #define RF_ALIGNMENT_SHIFT      10 /* alignment size bit starts bit 10 */
   52 #define RF_ALIGNMENT_MASK       (0x003F << RF_ALIGNMENT_SHIFT)
   53                                 /* resource address alignemnt size bit mask */
   54 #define RF_ALIGNMENT_LOG2(x)    ((x) << RF_ALIGNMENT_SHIFT)
   55 #define RF_ALIGNMENT(x)         (((x) & RF_ALIGNMENT_MASK) >> RF_ALIGNMENT_SHIFT)
   56 
   57 enum    rman_type { RMAN_UNINIT = 0, RMAN_GAUGE, RMAN_ARRAY };
   58 
   59 /*
   60  * String length exported to userspace for resource names, etc.
   61  */
   62 #define RM_TEXTLEN      32
   63 
   64 /*
   65  * Userspace-exported structures.
   66  */
   67 struct u_resource {
   68         uintptr_t       r_handle;               /* resource uniquifier */
   69         uintptr_t       r_parent;               /* parent rman */
   70         uintptr_t       r_device;               /* device owning this resource */
   71         char            r_devname[RM_TEXTLEN];  /* device name XXX obsolete */
   72 
   73         u_long          r_start;                /* offset in resource space */
   74         u_long          r_size;                 /* size in resource space */
   75         u_int           r_flags;                /* RF_* flags */
   76 };
   77 
   78 struct u_rman {
   79         uintptr_t       rm_handle;              /* rman uniquifier */
   80         char            rm_descr[RM_TEXTLEN];   /* rman description */
   81 
   82         u_long          rm_start;               /* base of managed region */
   83         u_long          rm_size;                /* size of managed region */
   84         enum rman_type  rm_type;                /* region type */
   85 };
   86 
   87 #ifdef _KERNEL
   88 
   89 /*
   90  * The public (kernel) view of struct resource
   91  *
   92  * NB: Changing the offset/size/type of existing fields in struct resource
   93  * NB: breaks the device driver ABI and is strongly FORBIDDEN.
   94  * NB: Appending new fields is probably just misguided.
   95  */
   96 
   97 struct resource {
   98         struct resource_i       *__r_i;
   99         bus_space_tag_t         r_bustag; /* bus_space tag */
  100         bus_space_handle_t      r_bushandle;    /* bus_space handle */
  101 };
  102 
  103 struct resource_i;
  104 
  105 TAILQ_HEAD(resource_head, resource_i);
  106 
  107 struct rman {
  108         struct  resource_head   rm_list;
  109         struct  mtx *rm_mtx;    /* mutex used to protect rm_list */
  110         TAILQ_ENTRY(rman)       rm_link; /* link in list of all rmans */
  111         u_long  rm_start;       /* index of globally first entry */
  112         u_long  rm_end;         /* index of globally last entry */
  113         enum    rman_type rm_type; /* what type of resource this is */
  114         const   char *rm_descr; /* text descripion of this resource */
  115 };
  116 TAILQ_HEAD(rman_head, rman);
  117 
  118 int     rman_activate_resource(struct resource *r);
  119 int     rman_await_resource(struct resource *r, int pri, int timo);
  120 bus_space_handle_t rman_get_bushandle(struct resource *);
  121 bus_space_tag_t rman_get_bustag(struct resource *);
  122 u_long  rman_get_end(struct resource *);
  123 struct device *rman_get_device(struct resource *);
  124 u_int   rman_get_flags(struct resource *);
  125 int     rman_get_rid(struct resource *);
  126 u_long  rman_get_size(struct resource *);
  127 u_long  rman_get_start(struct resource *);
  128 void   *rman_get_virtual(struct resource *);
  129 int     rman_deactivate_resource(struct resource *r);
  130 int     rman_fini(struct rman *rm);
  131 int     rman_init(struct rman *rm);
  132 int     rman_init_from_resource(struct rman *rm, struct resource *r);
  133 uint32_t rman_make_alignment_flags(uint32_t size);
  134 int     rman_manage_region(struct rman *rm, u_long start, u_long end);
  135 int     rman_is_region_manager(struct resource *r, struct rman *rm);
  136 int     rman_release_resource(struct resource *r);
  137 struct resource *rman_reserve_resource(struct rman *rm, u_long start,
  138                                         u_long end, u_long count,
  139                                         u_int flags, struct device *dev);
  140 struct resource *rman_reserve_resource_bound(struct rman *rm, u_long start,
  141                                         u_long end, u_long count, u_long bound,
  142                                         u_int flags, struct device *dev);
  143 void    rman_set_bushandle(struct resource *_r, bus_space_handle_t _h);
  144 void    rman_set_bustag(struct resource *_r, bus_space_tag_t _t);
  145 void    rman_set_device(struct resource *_r, struct device *_dev);
  146 void    rman_set_end(struct resource *_r, u_long _end);
  147 void    rman_set_rid(struct resource *_r, int _rid);
  148 void    rman_set_start(struct resource *_r, u_long _start);
  149 void    rman_set_virtual(struct resource *_r, void *_v);
  150 
  151 extern  struct rman_head rman_head;
  152 
  153 #endif /* _KERNEL */
  154 
  155 #endif /* !_SYS_RMAN_H_ */

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