1093cd82e0
This allows the Grant-table code to attach directly to the xenpv bus, allowing us to remove the grant-table initialization done in xenpv. Sponsored by: Citrix Systems R&D
113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/*
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* Copyright (c) 2014 Roger Pau Monné <roger.pau@citrix.com>
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/pcpu.h>
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#include <sys/smp.h>
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#include <xen/xen-os.h>
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#include <xen/gnttab.h>
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static devclass_t xenpv_devclass;
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static void
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xenpv_identify(driver_t *driver, device_t parent)
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{
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if (!xen_domain())
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return;
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/* Make sure there's only one xenpv device. */
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if (devclass_get_device(xenpv_devclass, 0))
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return;
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if (BUS_ADD_CHILD(parent, 0, "xenpv", 0) == NULL)
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panic("Unable to attach xenpv bus.");
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}
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static int
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xenpv_probe(device_t dev)
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{
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device_set_desc(dev, "Xen PV bus");
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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xenpv_attach(device_t dev)
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{
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device_t child;
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/*
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* Let our child drivers identify any child devices that they
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* can find. Once that is done attach any devices that we
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* found.
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*/
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bus_generic_probe(dev);
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bus_generic_attach(dev);
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if (!devclass_get_device(devclass_find("isa"), 0)) {
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child = BUS_ADD_CHILD(dev, 0, "isa", 0);
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if (child == NULL)
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panic("Failed to attach ISA bus.");
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device_probe_and_attach(child);
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}
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return (0);
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}
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static device_method_t xenpv_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, xenpv_identify),
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DEVMETHOD(device_probe, xenpv_probe),
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DEVMETHOD(device_attach, xenpv_attach),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus interface */
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DEVMETHOD(bus_add_child, bus_generic_add_child),
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DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD_END
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};
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static driver_t xenpv_driver = {
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"xenpv",
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xenpv_methods,
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0,
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};
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DRIVER_MODULE(xenpv, nexus, xenpv_driver, xenpv_devclass, 0, 0);
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