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#
# Copyright (c) 1998 Doug Rabson
# 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.
#
# $Id: bus_if.m,v 1.7 1999/04/16 21:22:37 peter Exp $
#
INTERFACE bus;
#
# This is called from system code which prints out a description of a
# device. It should describe the attachment that the child has with
# the parent. For instance the TurboLaser bus prints which node the
# device is attached to.
#
METHOD void print_child {
device_t dev;
device_t child;
};
#
# These two methods manage a bus specific set of instance variables of
# a child device. The intention is that each different type of bus
# defines a set of appropriate instance variables (such as ports and
# irqs for ISA bus etc.)
#
# This information could be given to the child device as a struct but
# that makes it hard for a bus to add or remove variables without
# forcing an edit and recompile for all drivers which may not be
# possible for vendor supplied binary drivers.
#
# Read an instance variable. Return 0 on success.
#
METHOD int read_ivar {
device_t dev;
device_t child;
int index;
uintptr_t *result;
};
#
# Write an instance variable. Return 0 on success.
#
METHOD int write_ivar {
device_t dev;
device_t child;
int index;
uintptr_t value;
};
#
# Called after the child's DEVICE_DETACH method to allow the parent
# to reclaim any resources allocated on behalf of the child.
#
METHOD void child_detached {
device_t dev;
device_t child;
};
#
# Called when a new driver is added to the devclass which owns this
# bus. The generic implementation of this method attempts to probe and
# attach any un-matched children of the bus.
#
METHOD void driver_added {
device_t dev;
driver_t *driver;
}
#
# Allocate a system resource attached to `dev' on behalf of `child'.
# The types are defined in <machine/resource.h>; the meaning of the
# resource-ID field varies from bus to bus (but *rid == 0 is always
# valid if the resource type is). start and end reflect the allowable
# range, and should be passed as `0UL' and `~0UL', respectively, if
# the client has no range restriction. count is the number of consecutive
# indices in the resource required. flags is a set of sharing flags
# as defined in <sys/rman.h>.
#
# Returns a resource or a null pointer on failure. The caller is
# responsible for calling rman_activate_resource() when it actually
# uses the resource.
#
METHOD struct resource * alloc_resource {
device_t dev;
device_t child;
int type;
int *rid;
u_long start;
u_long end;
u_long count;
u_int flags;
};
METHOD int activate_resource {
device_t dev;
device_t child;
int type;
int rid;
struct resource *r;
};
METHOD int deactivate_resource {
device_t dev;
device_t child;
int type;
int rid;
struct resource *r;
};
#
# Free a resource allocated by the preceding method. The `rid' value
# must be the same as the one returned by BUS_ALLOC_RESOURCE (which
# is not necessarily the same as the one the client passed).
#
METHOD int release_resource {
device_t dev;
device_t child;
int type;
int rid;
struct resource *res;
};
METHOD int setup_intr {
device_t dev;
device_t child;
struct resource *irq;
int flags;
driver_intr_t *intr;
void *arg;
void **cookiep;
};
METHOD int teardown_intr {
device_t dev;
device_t child;
struct resource *irq;
void *cookie;
};
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