44e06d158a
This patch adds support for MSI interrupts when running on Xen. Apart from adding the Xen related code needed in order to register MSI interrupts this patch also makes the msi_init function a hook in init_ops, so different MSI implementations can have different initialization functions. Sponsored by: Citrix Systems R&D xen/interface/physdev.h: - Add the MAP_PIRQ_TYPE_MULTI_MSI to map multi-vector MSI to the Xen public interface. x86/include/init.h: - Add a hook for setting custom msi_init methods. amd64/amd64/machdep.c: i386/i386/machdep.c: - Set the default msi_init hook to point to the native MSI initialization method. x86/xen/pv.c: - Set the Xen MSI init hook when running as a Xen guest. x86/x86/local_apic.c: - Call the msi_init hook instead of directly calling msi_init. xen/xen_intr.h: x86/xen/xen_intr.c: - Introduce support for registering/releasing MSI interrupts with Xen. - The MSI interrupts will use the same PIC as the IO APIC interrupts. xen/xen_msi.h: x86/xen/xen_msi.c: - Introduce a Xen MSI implementation. x86/xen/xen_nexus.c: - Overwrite the default MSI hooks in the Xen Nexus to use the Xen MSI implementation. x86/xen/xen_pci.c: - Introduce a Xen specific PCI bus that inherits from the ACPI PCI bus and overwrites the native MSI methods. - This is needed because when running under Xen the MSI messages used to configure MSI interrupts on PCI devices are written by Xen itself. dev/acpica/acpi_pci.c: - Lower the quality of the ACPI PCI bus so the newly introduced Xen PCI bus can take over when needed. conf/files.i386: conf/files.amd64: - Add the newly created files to the build process.
174 lines
4.4 KiB
C
174 lines
4.4 KiB
C
/*
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* Copyright (c) 2013 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/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/smp.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <dev/acpica/acpivar.h>
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#include <x86/init.h>
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#include <machine/nexusvar.h>
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#include <machine/intr_machdep.h>
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#include <xen/xen-os.h>
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#include <xen/xen_intr.h>
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#include <xen/xen_msi.h>
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#include "pcib_if.h"
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/*
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* Xen nexus(4) driver.
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*/
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static int
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nexus_xen_probe(device_t dev)
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{
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if (!xen_pv_domain())
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return (ENXIO);
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return (BUS_PROBE_SPECIFIC);
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}
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static int
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nexus_xen_attach(device_t dev)
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{
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int error;
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#ifndef XEN
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device_t acpi_dev;
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#endif
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nexus_init_resources();
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bus_generic_probe(dev);
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#ifndef XEN
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if (xen_initial_domain()) {
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/* Disable some ACPI devices that are not usable by Dom0 */
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acpi_cpu_disabled = true;
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acpi_hpet_disabled = true;
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acpi_timer_disabled = true;
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acpi_dev = BUS_ADD_CHILD(dev, 10, "acpi", 0);
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if (acpi_dev == NULL)
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panic("Unable to add ACPI bus to Xen Dom0");
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}
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#endif
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error = bus_generic_attach(dev);
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#ifndef XEN
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if (xen_initial_domain() && (error == 0))
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acpi_install_wakeup_handler(device_get_softc(acpi_dev));
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#endif
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return (error);
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}
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static int
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nexus_xen_config_intr(device_t dev, int irq, enum intr_trigger trig,
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enum intr_polarity pol)
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{
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int ret;
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/*
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* ISA and PCI intline IRQs are not preregistered on Xen, so
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* intercept calls to configure those and register them on the fly.
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*/
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if ((irq < FIRST_MSI_INT) && (intr_lookup_source(irq) == NULL)) {
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ret = xen_register_pirq(irq, trig, pol);
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if (ret != 0)
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return (ret);
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nexus_add_irq(irq);
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}
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return (intr_config_intr(irq, trig, pol));
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}
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static int
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nexus_xen_alloc_msix(device_t pcib, device_t dev, int *irq)
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{
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return (xen_msix_alloc(dev, irq));
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}
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static int
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nexus_xen_release_msix(device_t pcib, device_t dev, int irq)
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{
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return (xen_msix_release(irq));
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}
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static int
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nexus_xen_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
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{
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return (xen_msi_alloc(dev, count, maxcount, irqs));
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}
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static int
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nexus_xen_release_msi(device_t pcib, device_t dev, int count, int *irqs)
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{
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return (xen_msi_release(irqs, count));
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}
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static int
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nexus_xen_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
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{
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return (xen_msi_map(irq, addr, data));
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}
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static device_method_t nexus_xen_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, nexus_xen_probe),
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DEVMETHOD(device_attach, nexus_xen_attach),
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/* INTR */
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DEVMETHOD(bus_config_intr, nexus_xen_config_intr),
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/* MSI */
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DEVMETHOD(pcib_alloc_msi, nexus_xen_alloc_msi),
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DEVMETHOD(pcib_release_msi, nexus_xen_release_msi),
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DEVMETHOD(pcib_alloc_msix, nexus_xen_alloc_msix),
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DEVMETHOD(pcib_release_msix, nexus_xen_release_msix),
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DEVMETHOD(pcib_map_msi, nexus_xen_map_msi),
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{ 0, 0 }
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};
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DEFINE_CLASS_1(nexus, nexus_xen_driver, nexus_xen_methods, 1, nexus_driver);
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static devclass_t nexus_devclass;
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DRIVER_MODULE(nexus_xen, root, nexus_xen_driver, nexus_devclass, 0, 0);
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