817ba5c0b8
a variant PCI bus instead of trying to shoehorn it into the PCI host bridge adapter. Besides matching better the architecture on other platforms, this also allows systems with multiple partitionable endpoints per PCI host bridge to work correctly.
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*-
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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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