bea6af4d31
easier to use and more flexible. * Change BUS_ADD_CHILD to take an order argument instead of a place. * Define a partial ordering for isa devices so that sensitive devices are probed before non-sensitive ones.
154 lines
4.5 KiB
C
154 lines
4.5 KiB
C
/*-
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* Copyright (c) 1997,1998 Doug Rabson
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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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* $Id: bus_private.h,v 1.8 1999/05/14 09:13:39 dfr Exp $
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*/
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#ifndef _SYS_BUS_PRIVATE_H_
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#define _SYS_BUS_PRIVATE_H_
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#include <sys/bus.h>
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/*
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* Used to attach drivers to devclasses.
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*/
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typedef struct driverlink *driverlink_t;
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struct driverlink {
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driver_t *driver;
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TAILQ_ENTRY(driverlink) link; /* list of drivers in devclass */
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};
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/*
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* Forward declarations
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*/
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typedef TAILQ_HEAD(devclass_list, devclass) devclass_list_t;
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typedef TAILQ_HEAD(driver_list, driverlink) driver_list_t;
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typedef TAILQ_HEAD(device_list, device) device_list_t;
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struct devclass {
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TAILQ_ENTRY(devclass) link;
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driver_list_t drivers; /* bus devclasses store drivers for bus */
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char *name;
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device_t *devices; /* array of devices indexed by unit */
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int maxunit; /* size of devices array */
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int nextunit; /* next unused unit number */
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};
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/*
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* Resources from config(8).
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*/
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typedef enum {
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RES_INT, RES_STRING, RES_LONG
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} resource_type;
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struct config_resource {
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char *name;
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resource_type type;
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union {
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long longval;
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int intval;
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char* stringval;
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} u;
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};
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struct config_device {
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char *name; /* e.g. "lpt", "wdc" etc */
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int unit;
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int resource_count;
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struct config_resource *resources;
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};
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/*
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* Compiled device methods.
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*/
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struct device_ops {
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int maxoffset;
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devop_t methods[1];
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};
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/*
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* Helpers for device method wrappers.
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*/
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#define DEVOPDESC(OP) (&OP##_##desc)
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#define DEVOPS(DEV) (DEV->ops)
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#define DEVOPMETH(DEV, OP) \
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((DEVOPDESC(OP)->offset >= DEVOPS(DEV)->maxoffset) \
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? DEVOPDESC(OP)->deflt \
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: DEVOPS(DEV)->methods[DEVOPDESC(OP)->offset])
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#define DRVOPS(DRV) ((struct device_ops *)DRV->ops)
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#define DRVOPMETH(DRV, OP) \
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((DEVOPDESC(OP)->offset >= DRVOPS(DRV)->maxoffset) \
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? DEVOPDESC(OP)->deflt \
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: DRVOPS(DRV)->methods[DEVOPDESC(OP)->offset])
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/*
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* Implementation of device.
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*/
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struct device {
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/*
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* Device hierarchy.
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*/
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TAILQ_ENTRY(device) link; /* list of devices in parent */
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device_t parent;
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device_list_t children; /* list of subordinate devices */
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/*
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* Details of this device.
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*/
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device_ops_t ops;
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driver_t *driver;
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devclass_t devclass; /* device class which we are in */
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int unit;
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char* nameunit; /* name+unit e.g. foodev0 */
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char* desc; /* driver specific description */
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int busy; /* count of calls to device_busy() */
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device_state_t state;
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u_short flags;
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#define DF_ENABLED 1 /* device should be probed/attached */
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#define DF_FIXEDCLASS 2 /* devclass specified at create time */
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#define DF_WILDCARD 4 /* unit was originally wildcard */
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#define DF_DESCMALLOCED 8 /* description was malloced */
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#define DF_QUIET 16 /* don't print verbose attach message */
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u_char order; /* order from device_add_child_ordered() */
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u_char pad;
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#ifdef DEVICE_SYSCTLS
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struct sysctl_oid oid[4];
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struct sysctl_oid_list oidlist[1];
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#endif
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void *ivars;
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void *softc;
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};
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struct device_op_desc {
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unsigned int offset; /* offset in driver ops */
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struct method* method; /* internal method implementation */
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devop_t deflt; /* default implementation */
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const char* name; /* unique name (for registration) */
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};
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#endif /* !_SYS_BUS_PRIVATE_H_ */
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