mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-30 13:44:55 +00:00
9dbf5b0e68
The public bus_release_resource() API still accepts both forms, but the internal kobj method no longer passes the arguments. Implementations which need the rid or type now use rman_get_rid() or rman_get_type() to fetch the value from the allocated resource. Reviewed by: imp Differential Revision: https://reviews.freebsd.org/D44131
190 lines
5.5 KiB
C
190 lines
5.5 KiB
C
/*-
|
|
* Copyright 1998 Massachusetts Institute of Technology
|
|
* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>.
|
|
* Copyright 2006 by Marius Strobl <marius@FreeBSD.org>.
|
|
* All rights reserved.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and
|
|
* its documentation for any purpose and without fee is hereby
|
|
* granted, provided that both the above copyright notice and this
|
|
* permission notice appear in all copies, that both the above
|
|
* copyright notice and this permission notice appear in all
|
|
* supporting documentation, and that the name of M.I.T. not be used
|
|
* in advertising or publicity pertaining to distribution of the
|
|
* software without specific, written prior permission. M.I.T. makes
|
|
* no representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied
|
|
* warranty.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
|
|
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
|
|
* SHALL M.I.T. 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.
|
|
*
|
|
* from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/rman.h>
|
|
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/fdt/simplebus.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/resource.h>
|
|
|
|
/*
|
|
* The ofwbus (which is a pseudo-bus actually) iterates over the nodes that
|
|
* hang from the Open Firmware root node and adds them as devices to this bus
|
|
* (except some special nodes which are excluded) so that drivers can be
|
|
* attached to them. There should be only one ofwbus in the system, added
|
|
* directly as a child of nexus0.
|
|
*/
|
|
|
|
static device_probe_t ofwbus_probe;
|
|
static device_attach_t ofwbus_attach;
|
|
static bus_alloc_resource_t ofwbus_alloc_resource;
|
|
static bus_release_resource_t ofwbus_release_resource;
|
|
|
|
static device_method_t ofwbus_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, ofwbus_probe),
|
|
DEVMETHOD(device_attach, ofwbus_attach),
|
|
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_alloc_resource, ofwbus_alloc_resource),
|
|
DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
|
|
DEVMETHOD(bus_release_resource, ofwbus_release_resource),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
DEFINE_CLASS_1(ofwbus, ofwbus_driver, ofwbus_methods,
|
|
sizeof(struct simplebus_softc), simplebus_driver);
|
|
EARLY_DRIVER_MODULE(ofwbus, nexus, ofwbus_driver, 0, 0,
|
|
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
|
|
MODULE_VERSION(ofwbus, 1);
|
|
|
|
static int
|
|
ofwbus_probe(device_t dev)
|
|
{
|
|
|
|
if (OF_peer(0) == 0)
|
|
return (ENXIO);
|
|
|
|
/* Only one instance of ofwbus. */
|
|
if (device_get_unit(dev) != 0)
|
|
panic("ofwbus added with non-zero unit number: %d\n",
|
|
device_get_unit(dev));
|
|
|
|
device_set_desc(dev, "Open Firmware Device Tree");
|
|
return (BUS_PROBE_NOWILDCARD);
|
|
}
|
|
|
|
static int
|
|
ofwbus_attach(device_t dev)
|
|
{
|
|
phandle_t node;
|
|
|
|
node = OF_peer(0);
|
|
|
|
/*
|
|
* If no Open Firmware, bail early
|
|
*/
|
|
if (node == -1)
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* ofwbus bus starts on unamed node in FDT, so we cannot make
|
|
* ofw_bus_devinfo from it. Pass node to simplebus_init directly.
|
|
*/
|
|
simplebus_init(dev, node);
|
|
|
|
/*
|
|
* Allow devices to identify.
|
|
*/
|
|
bus_generic_probe(dev);
|
|
|
|
/*
|
|
* Now walk the OFW tree and attach top-level devices.
|
|
*/
|
|
for (node = OF_child(node); node > 0; node = OF_peer(node))
|
|
simplebus_add_device(dev, node, 0, NULL, -1, NULL);
|
|
|
|
return (bus_generic_attach(dev));
|
|
}
|
|
|
|
static struct resource *
|
|
ofwbus_alloc_resource(device_t bus, device_t child, int type, int *rid,
|
|
rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
|
|
{
|
|
struct resource *rv;
|
|
struct resource_list_entry *rle;
|
|
bool isdefault, passthrough;
|
|
|
|
isdefault = RMAN_IS_DEFAULT_RANGE(start, end);
|
|
passthrough = (device_get_parent(child) != bus);
|
|
rle = NULL;
|
|
if (!passthrough && isdefault) {
|
|
rle = resource_list_find(BUS_GET_RESOURCE_LIST(bus, child),
|
|
type, *rid);
|
|
if (rle == NULL) {
|
|
if (bootverbose)
|
|
device_printf(bus, "no default resources for "
|
|
"rid = %d, type = %d\n", *rid, type);
|
|
return (NULL);
|
|
}
|
|
start = rle->start;
|
|
count = ummax(count, rle->count);
|
|
end = ummax(rle->end, start + count - 1);
|
|
}
|
|
|
|
/* Let nexus handle the allocation. */
|
|
rv = bus_generic_alloc_resource(bus, child, type, rid, start, end,
|
|
count, flags);
|
|
if (rv == NULL)
|
|
return (NULL);
|
|
|
|
if (!passthrough && rle != NULL) {
|
|
rle->res = rv;
|
|
rle->start = rman_get_start(rv);
|
|
rle->end = rman_get_end(rv);
|
|
rle->count = rle->end - rle->start + 1;
|
|
}
|
|
|
|
return (rv);
|
|
}
|
|
|
|
static int
|
|
ofwbus_release_resource(device_t bus, device_t child, struct resource *r)
|
|
{
|
|
struct resource_list_entry *rle;
|
|
bool passthrough;
|
|
|
|
passthrough = (device_get_parent(child) != bus);
|
|
if (!passthrough) {
|
|
/* Clean resource list entry */
|
|
rle = resource_list_find(BUS_GET_RESOURCE_LIST(bus, child),
|
|
rman_get_type(r), rman_get_rid(r));
|
|
if (rle != NULL)
|
|
rle->res = NULL;
|
|
}
|
|
|
|
/* Let nexus handle the release. */
|
|
return (bus_generic_release_resource(bus, child, r));
|
|
}
|