4a5aacdfea
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
/*-
|
|
* Copyright (c) 2000 Michael Smith
|
|
* Copyright (c) 2000 BSDi
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
typedef uintptr_t devinfo_handle_t;
|
|
#define DEVINFO_ROOT_DEVICE (devinfo_handle_t)0
|
|
|
|
struct devinfo_dev {
|
|
devinfo_handle_t dd_handle; /* device handle */
|
|
devinfo_handle_t dd_parent; /* parent handle */
|
|
|
|
char *dd_name; /* name of device */
|
|
char *dd_desc; /* device description */
|
|
char *dd_drivername; /* name of attached driver*/
|
|
};
|
|
|
|
struct devinfo_rman {
|
|
devinfo_handle_t dm_handle; /* resource manager handle */
|
|
|
|
u_long dm_start; /* resource start */
|
|
u_long dm_size; /* resource size */
|
|
|
|
char *dm_desc; /* resource description */
|
|
};
|
|
|
|
struct devinfo_res {
|
|
devinfo_handle_t dr_handle; /* resource handle */
|
|
devinfo_handle_t dr_rman; /* resource manager handle */
|
|
devinfo_handle_t dr_device; /* owning device */
|
|
|
|
u_long dr_start; /* region start */
|
|
u_long dr_size; /* region size */
|
|
/* XXX add flags */
|
|
};
|
|
|
|
/*
|
|
* Acquire a coherent copy of the kernel's device and resource tables.
|
|
* This must return success (zero) before any other interfaces will
|
|
* function. Sets errno on failure.
|
|
*/
|
|
extern int devinfo_init(void);
|
|
|
|
/*
|
|
* Release the storage associated with the internal copy of the device
|
|
* and resource tables. devinfo_init must be called before any attempt
|
|
* is made to use any other interfaces.
|
|
*/
|
|
extern void devinfo_free(void);
|
|
|
|
/*
|
|
* Find a device/resource/resource manager by its handle.
|
|
*/
|
|
extern struct devinfo_dev
|
|
*devinfo_handle_to_device(devinfo_handle_t handle);
|
|
extern struct devinfo_res
|
|
*devinfo_handle_to_resource(devinfo_handle_t handle);
|
|
extern struct devinfo_rman
|
|
*devinfo_handle_to_rman(devinfo_handle_t handle);
|
|
|
|
/*
|
|
* Iterate over the children of a device, calling (fn) on each. If
|
|
* (fn) returns nonzero, abort the scan and return.
|
|
*/
|
|
extern int
|
|
devinfo_foreach_device_child(struct devinfo_dev *parent,
|
|
int (* fn)(struct devinfo_dev *child, void *arg),
|
|
void *arg);
|
|
|
|
/*
|
|
* Iterate over all the resources owned by a device, calling (fn) on each.
|
|
* If (fn) returns nonzero, abort the scan and return.
|
|
*/
|
|
extern int
|
|
devinfo_foreach_device_resource(struct devinfo_dev *dev,
|
|
int (* fn)(struct devinfo_dev *dev,
|
|
struct devinfo_res *res, void *arg),
|
|
void *arg);
|
|
|
|
/*
|
|
* Iterate over all the resources owned by a resource manager, calling (fn)
|
|
* on each. If (fn) returns nonzero, abort the scan and return.
|
|
*/
|
|
extern int
|
|
devinfo_foreach_rman_resource(struct devinfo_rman *rman,
|
|
int (* fn)(struct devinfo_res *res, void *arg),
|
|
void *arg);
|
|
|
|
/*
|
|
* Iterate over all the resource managers, calling (fn) on each. If (fn)
|
|
* returns nonzero, abort the scan and return.
|
|
*/
|
|
extern int
|
|
devinfo_foreach_rman(int (* fn)(struct devinfo_rman *rman, void *arg),
|
|
void *arg);
|