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

     /*
      * Copyright (c) 2014 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_pci_bus.c 275649 2014-12-09 18:03:25Z royger $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    
    #include <sys/pciio.h>
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pci_private.h>
    
    #include <xen/xen-os.h>
    #include <xen/hypervisor.h>
    #include <xen/xen_pci.h>
    
    #include "pcib_if.h"
    #include "pci_if.h"
    
    void
    xen_pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
         uint16_t data)
    {
            struct pci_devinfo *dinfo = device_get_ivars(child);
            struct pcicfg_msi *msi = &dinfo->cfg.msi;
    
            /* Enable MSI in the control register. */
            msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
            pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
                msi->msi_ctrl, 2);
    }
    
    void
    xen_pci_disable_msi_method(device_t dev, device_t child)
    {
            struct pci_devinfo *dinfo = device_get_ivars(child);
            struct pcicfg_msi *msi = &dinfo->cfg.msi;
    
            msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
            pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
                msi->msi_ctrl, 2);
    }
    
    void
    xen_pci_child_added_method(device_t dev, device_t child)
    {
            struct pci_devinfo *dinfo;
            struct physdev_pci_device_add add_pci;
            int error;
    
            dinfo = device_get_ivars(child);
            KASSERT((dinfo != NULL),
                ("xen_pci_add_child_method called with NULL dinfo"));
    
            bzero(&add_pci, sizeof(add_pci));
            add_pci.seg = dinfo->cfg.domain;
            add_pci.bus = dinfo->cfg.bus;
            add_pci.devfn = (dinfo->cfg.slot << 3) | dinfo->cfg.func;
            error = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_add, &add_pci);
            if (error)
                    panic("unable to add device bus %u devfn %u error: %d\n",
                        add_pci.bus, add_pci.devfn, error);
    }

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