114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
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/*-
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* Copyright (c) 2011 Nathan Whitehorn
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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/libkern.h>
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#include <sys/module.h>
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#include <sys/pciio.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pci_private.h>
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#include <machine/bus.h>
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#include <machine/rtas.h>
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#include <powerpc/ofw/ofw_pcibus.h>
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#include <powerpc/pseries/plpar_iommu.h>
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#include "pci_if.h"
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#include "iommu_if.h"
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static int plpar_pcibus_probe(device_t);
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static bus_dma_tag_t plpar_pcibus_get_dma_tag(device_t dev, device_t child);
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/*
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* Driver methods.
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*/
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static device_method_t plpar_pcibus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, plpar_pcibus_probe),
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/* IOMMU functions */
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DEVMETHOD(bus_get_dma_tag, plpar_pcibus_get_dma_tag),
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DEVMETHOD(iommu_map, phyp_iommu_map),
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DEVMETHOD(iommu_unmap, phyp_iommu_unmap),
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DEVMETHOD_END
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};
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static devclass_t pci_devclass;
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DEFINE_CLASS_1(pci, plpar_pcibus_driver, plpar_pcibus_methods,
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sizeof(struct pci_softc), ofw_pcibus_driver);
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DRIVER_MODULE(plpar_pcibus, pcib, plpar_pcibus_driver, pci_devclass, 0, 0);
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static int
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plpar_pcibus_probe(device_t dev)
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{
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phandle_t rtas;
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if (ofw_bus_get_node(dev) == -1 || !rtas_exists())
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return (ENXIO);
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rtas = OF_finddevice("/rtas");
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if (!OF_hasprop(rtas, "ibm,hypertas-functions"))
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return (ENXIO);
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device_set_desc(dev, "POWER Hypervisor PCI bus");
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return (BUS_PROBE_SPECIFIC);
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}
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static bus_dma_tag_t
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plpar_pcibus_get_dma_tag(device_t dev, device_t child)
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{
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struct ofw_pcibus_devinfo *dinfo;
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while (device_get_parent(child) != dev)
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child = device_get_parent(child);
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dinfo = device_get_ivars(child);
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if (dinfo->opd_dma_tag != NULL)
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return (dinfo->opd_dma_tag);
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bus_dma_tag_create(bus_get_dma_tag(dev),
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1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
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NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
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BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->opd_dma_tag);
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phyp_iommu_set_dma_tag(dev, child, dinfo->opd_dma_tag);
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return (dinfo->opd_dma_tag);
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}
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