1f62e17066
When running as a Xen PVH Dom0 we need to add custom buses that override some of the functionality present in the ACPI PCI Bus and the PCI Bus. We currently override the ACPI PCI Bus, but not the PCI Bus, so add a new override for the PCI Bus and share the generic functions between them. Reported by: David P. Discher <dpd@dpdtech.com> Sponsored by: Citrix Systems R&D conf/files.amd64: - Add the new files. x86/xen/xen_pci_bus.c: - Generic file that contains the PCI overrides so they can be used by the several PCI specific buses. xen/xen_pci.h: - Prototypes for the generic overried functions. dev/xen/pci/xen_pci.c: - Xen specific override for the PCI bus. dev/xen/pci/xen_acpi_pci.c: - Xen specific override for the ACPI PCI bus.
91 lines
3.0 KiB
C
91 lines
3.0 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/pciio.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pci_private.h>
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#include <xen/xen-os.h>
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#include <xen/hypervisor.h>
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#include <xen/xen_pci.h>
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#include "pcib_if.h"
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#include "pci_if.h"
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void
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xen_pci_enable_msi_method(device_t dev, device_t child, uint64_t address,
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uint16_t data)
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{
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struct pci_devinfo *dinfo = device_get_ivars(child);
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struct pcicfg_msi *msi = &dinfo->cfg.msi;
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/* Enable MSI in the control register. */
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msi->msi_ctrl |= PCIM_MSICTRL_MSI_ENABLE;
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pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
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msi->msi_ctrl, 2);
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}
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void
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xen_pci_disable_msi_method(device_t dev, device_t child)
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{
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struct pci_devinfo *dinfo = device_get_ivars(child);
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struct pcicfg_msi *msi = &dinfo->cfg.msi;
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msi->msi_ctrl &= ~PCIM_MSICTRL_MSI_ENABLE;
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pci_write_config(child, msi->msi_location + PCIR_MSI_CTRL,
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msi->msi_ctrl, 2);
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}
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void
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xen_pci_child_added_method(device_t dev, device_t child)
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{
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struct pci_devinfo *dinfo;
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struct physdev_pci_device_add add_pci;
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int error;
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dinfo = device_get_ivars(child);
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KASSERT((dinfo != NULL),
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("xen_pci_add_child_method called with NULL dinfo"));
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bzero(&add_pci, sizeof(add_pci));
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add_pci.seg = dinfo->cfg.domain;
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add_pci.bus = dinfo->cfg.bus;
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add_pci.devfn = (dinfo->cfg.slot << 3) | dinfo->cfg.func;
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error = HYPERVISOR_physdev_op(PHYSDEVOP_pci_device_add, &add_pci);
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if (error)
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panic("unable to add device bus %u devfn %u error: %d\n",
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add_pci.bus, add_pci.devfn, error);
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}
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