FreeBSD/Linux Kernel Cross Reference
sys/x86/xen/xen_nexus.c

     /*
      * 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: releng/11.2/sys/x86/xen/xen_nexus.c 282274 2015-04-30 15:48:48Z jhb $");
    
    #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;
            device_t acpi_dev = NULL;
    
            nexus_init_resources();
            bus_generic_probe(dev);
    
            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");
            }
    
            error = bus_generic_attach(dev);
            if (xen_initial_domain() && (error == 0))
                    acpi_install_wakeup_handler(device_get_softc(acpi_dev));
    
            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);

Cache object: 2a07ec8c0a62df4cd03489502d6e200a