a2e6df2951
The devinfo library provides access to the kernel's internal device hierarchy and to the I/O resource manager. The library uses a sysctl(9) interface to obtain a snapshot of the kernel's state which is then made available to the application.
120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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typedef uintptr_t devinfo_handle_t;
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#define DEVINFO_ROOT_DEVICE (devinfo_handle_t)0
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struct devinfo_dev {
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devinfo_handle_t dd_handle; /* device handle */
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devinfo_handle_t dd_parent; /* parent handle */
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char *dd_name; /* name of device */
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char *dd_desc; /* device description */
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char *dd_drivername; /* name of attached driver*/
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};
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struct devinfo_rman {
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devinfo_handle_t dm_handle; /* resource manager handle */
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u_long dm_start; /* resource start */
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u_long dm_size; /* resource size */
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char *dm_desc; /* resource description */
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};
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struct devinfo_res {
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devinfo_handle_t dr_handle; /* resource handle */
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devinfo_handle_t dr_rman; /* resource manager handle */
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devinfo_handle_t dr_device; /* owning device */
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u_long dr_start; /* region start */
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u_long dr_size; /* region size */
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/* XXX add flags */
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};
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/*
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* Acquire a coherent copy of the kernel's device and resource tables.
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* This must return success (zero) before any other interfaces will
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* function. Sets errno on failure.
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*/
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extern int devinfo_init(void);
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/*
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* Release the storage associated with the internal copy of the device
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* and resource tables. devinfo_init must be called before any attempt
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* is made to use any other interfaces.
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*/
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extern void devinfo_free(void);
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/*
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* Find a device/resource/resource manager by its handle.
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*/
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extern struct devinfo_dev
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*devinfo_handle_to_device(devinfo_handle_t handle);
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extern struct devinfo_res
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*devinfo_handle_to_resource(devinfo_handle_t handle);
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extern struct devinfo_rman
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*devinfo_handle_to_rman(devinfo_handle_t handle);
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/*
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* Iterate over the children of a device, calling (fn) on each. If
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* (fn) returns nonzero, abort the scan and return.
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*/
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extern int
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devinfo_foreach_device_child(struct devinfo_dev *parent,
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int (* fn)(struct devinfo_dev *child, void *arg),
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void *arg);
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/*
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* Iterate over all the resources owned by a device, calling (fn) on each.
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* If (fn) returns nonzero, abort the scan and return.
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*/
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extern int
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devinfo_foreach_device_resource(struct devinfo_dev *dev,
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int (* fn)(struct devinfo_dev *dev,
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struct devinfo_res *res, void *arg),
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void *arg);
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/*
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* Iterate over all the resources owned by a resource manager, calling (fn)
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* on each. If (fn) returns nonzero, abort the scan and return.
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*/
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extern int
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devinfo_foreach_rman_resource(struct devinfo_rman *rman,
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int (* fn)(struct devinfo_res *res, void *arg),
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void *arg);
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/*
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* Iterate over all the resource managers, calling (fn) on each. If (fn)
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* returns nonzero, abort the scan and return.
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*/
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extern int
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devinfo_foreach_rman(int (* fn)(struct devinfo_rman *rman, void *arg),
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void *arg);
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