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/*
* Copyright (c) 2013 Roger Pau Monné <roger.pau@citrix.com>
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/smp.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <dev/acpica/acpivar.h>
#include <x86/init.h>
#include <machine/nexusvar.h>
#include <machine/intr_machdep.h>
#include <xen/xen-os.h>
#include <xen/xen_intr.h>
#include <xen/xen_msi.h>
#include "pcib_if.h"
/*
* Xen nexus(4) driver.
*/
static int
nexus_xen_probe(device_t dev)
{
if (!xen_pv_domain())
return (ENXIO);
return (BUS_PROBE_SPECIFIC);
}
static int
nexus_xen_attach(device_t dev)
{
int error;
#ifndef XEN
device_t acpi_dev;
#endif
nexus_init_resources();
bus_generic_probe(dev);
#ifndef XEN
if (xen_initial_domain()) {
/* Disable some ACPI devices that are not usable by Dom0 */
acpi_cpu_disabled = true;
acpi_hpet_disabled = true;
acpi_timer_disabled = true;
acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0);
if (acpi_dev == NULL)
panic("Unable to add ACPI bus to Xen Dom0");
}
#endif
error = bus_generic_attach(dev);
#ifndef XEN
if (xen_initial_domain() && (error == 0))
acpi_install_wakeup_handler(device_get_softc(acpi_dev));
#endif
return (error);
}
static int
nexus_xen_config_intr(device_t dev, int irq, enum intr_trigger trig,
enum intr_polarity pol)
{
int ret;
/*
* ISA and PCI intline IRQs are not preregistered on Xen, so
* intercept calls to configure those and register them on the fly.
*/
if ((irq < FIRST_MSI_INT) && (intr_lookup_source(irq) == NULL)) {
ret = xen_register_pirq(irq, trig, pol);
if (ret != 0)
return (ret);
nexus_add_irq(irq);
}
return (intr_config_intr(irq, trig, pol));
}
static int
nexus_xen_alloc_msix(device_t pcib, device_t dev, int *irq)
{
return (xen_msix_alloc(dev, irq));
}
static int
nexus_xen_release_msix(device_t pcib, device_t dev, int irq)
{
return (xen_msix_release(irq));
}
static int
nexus_xen_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
{
return (xen_msi_alloc(dev, count, maxcount, irqs));
}
static int
nexus_xen_release_msi(device_t pcib, device_t dev, int count, int *irqs)
{
return (xen_msi_release(irqs, count));
}
static int
nexus_xen_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
{
return (xen_msi_map(irq, addr, data));
}
static device_method_t nexus_xen_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_xen_probe),
DEVMETHOD(device_attach, nexus_xen_attach),
/* INTR */
DEVMETHOD(bus_config_intr, nexus_xen_config_intr),
/* MSI */
DEVMETHOD(pcib_alloc_msi, nexus_xen_alloc_msi),
DEVMETHOD(pcib_release_msi, nexus_xen_release_msi),
DEVMETHOD(pcib_alloc_msix, nexus_xen_alloc_msix),
DEVMETHOD(pcib_release_msix, nexus_xen_release_msix),
DEVMETHOD(pcib_map_msi, nexus_xen_map_msi),
{ 0, 0 }
};
DEFINE_CLASS_1(nexus, nexus_xen_driver, nexus_xen_methods, 1, nexus_driver);
static devclass_t nexus_devclass;
DRIVER_MODULE(nexus_xen, root, nexus_xen_driver, nexus_devclass, 0, 0);
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