lib/libdevinfo/devinfo.h

   1 /*-
   2  * Copyright (c) 2000 Michael Smith
   3  * Copyright (c) 2000 BSDi
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: src/lib/libdevinfo/devinfo.h,v 1.5 2005/08/31 14:57:39 rodrigc Exp $
  28  * $DragonFly: src/lib/libdevinfo/devinfo.h,v 1.1 2008/09/30 12:20:29 hasso Exp $
  29  */
  30
  31 #ifndef _DEVINFO_H_INCLUDED
  32 #define _DEVINFO_H_INCLUDED
  33
  34 #include <sys/cdefs.h>
  35 #include <sys/types.h>
  36
  37 typedef __uintptr_t     devinfo_handle_t;
  38 #define DEVINFO_ROOT_DEVICE     ((devinfo_handle_t)0)
  39
  40 /*
  41  * State of the device.
  42  */
  43 /* XXX not sure if I want a copy here, or expose sys/bus.h */
  44 typedef enum devinfo_state {
  45         DIS_NOTPRESENT,                 /* not probed or probe failed */
  46         DIS_ALIVE,                      /* probe succeeded */
  47         DIS_ATTACHED,                   /* attach method called */
  48         DIS_BUSY                        /* device is open */
  49 } devinfo_state_t;
  50
  51 struct devinfo_dev {
  52         devinfo_handle_t        dd_handle;      /* device handle */
  53         devinfo_handle_t        dd_parent;      /* parent handle */
  54
  55         char                    *dd_name;       /* name of device */
  56         char                    *dd_desc;       /* device description */
  57         char                    *dd_drivername; /* name of attached driver*/
  58         char                    *dd_pnpinfo;    /* pnp info from parent bus */
  59         char                    *dd_location;   /* Where bus thinks dev at */
  60         uint32_t                dd_devflags;    /* API flags */
  61         uint16_t                dd_flags;       /* internal dev flags */
  62         devinfo_state_t         dd_state;       /* attacement state of dev */
  63 };
  64
  65 struct devinfo_rman {
  66         devinfo_handle_t        dm_handle;      /* resource manager handle */
  67
  68         unsigned long           dm_start;       /* resource start */
  69         unsigned long           dm_size;        /* resource size */
  70
  71         char                    *dm_desc;       /* resource description */
  72 };
  73
  74 struct devinfo_res {
  75         devinfo_handle_t        dr_handle;      /* resource handle */
  76         devinfo_handle_t        dr_rman;        /* resource manager handle */
  77         devinfo_handle_t        dr_device;      /* owning device */
  78
  79         unsigned long           dr_start;       /* region start */
  80         unsigned long           dr_size;        /* region size */
  81         /* XXX add flags */
  82 };
  83
  84 __BEGIN_DECLS
  85
  86 /*
  87  * Acquire a coherent copy of the kernel's device and resource tables.
  88  * This must return success (zero) before any other interfaces will
  89  * function.  Sets errno on failure.
  90  */
  91 extern int      devinfo_init(void);
  92
  93 /*
  94  * Release the storage associated with the internal copy of the device
  95  * and resource tables. devinfo_init must be called before any attempt
  96  * is made to use any other interfaces.
  97  */
  98 extern void     devinfo_free(void);
  99
 100 /*
 101  * Find a device/resource/resource manager by its handle.
 102  */
 103 extern struct devinfo_dev
 104         *devinfo_handle_to_device(devinfo_handle_t handle);
 105 extern struct devinfo_res
 106         *devinfo_handle_to_resource(devinfo_handle_t handle);
 107 extern struct devinfo_rman
 108         *devinfo_handle_to_rman(devinfo_handle_t handle);
 109
 110 /*
 111  * Iterate over the children of a device, calling (fn) on each.  If
 112  * (fn) returns nonzero, abort the scan and return.
 113  */
 114 extern int
 115         devinfo_foreach_device_child(struct devinfo_dev *parent,
 116             int (* fn)(struct devinfo_dev *child, void *arg),
 117             void *arg);
 118
 119 /*
 120  * Iterate over all the resources owned by a device, calling (fn) on each.
 121  * If (fn) returns nonzero, abort the scan and return.
 122  */
 123 extern int
 124         devinfo_foreach_device_resource(struct devinfo_dev *dev,
 125             int (* fn)(struct devinfo_dev *dev,
 126             struct devinfo_res *res, void *arg),
 127             void *arg);
 128
 129 /*
 130  * Iterate over all the resources owned by a resource manager, calling (fn)
 131  * on each.  If (fn) returns nonzero, abort the scan and return.
 132  */
 133 extern int
 134         devinfo_foreach_rman_resource(struct devinfo_rman *rman,
 135             int (* fn)(struct devinfo_res *res, void *arg),
 136             void *arg);
 137
 138 /*
 139  * Iterate over all the resource managers, calling (fn) on each.  If (fn)
 140  * returns nonzero, abort the scan and return.
 141  */
 142 extern int
 143         devinfo_foreach_rman(int (* fn)(struct devinfo_rman *rman, void *arg),
 144             void *arg);
 145
 146 __END_DECLS
 147
 148 #endif /* ! _DEVINFO_H_INCLUDED */