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- /*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2011 Nathan Whitehorn
- * 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("$FreeBSD$");
- #include <sys/param.h>
- #include <sys/bus.h>
- #include <sys/kernel.h>
- #include <sys/libkern.h>
- #include <sys/module.h>
- #include <sys/pciio.h>
- #include <dev/ofw/openfirm.h>
- #include <dev/pci/pcivar.h>
- #include <dev/pci/pcireg.h>
- #include <dev/pci/pci_private.h>
- #include <machine/bus.h>
- #include <machine/rtas.h>
- #include <powerpc/ofw/ofw_pcibus.h>
- #include <powerpc/pseries/plpar_iommu.h>
- #include "pci_if.h"
- #include "iommu_if.h"
- static int plpar_pcibus_probe(device_t);
- static bus_dma_tag_t plpar_pcibus_get_dma_tag(device_t dev, device_t child);
- /*
- * Driver methods.
- */
- static device_method_t plpar_pcibus_methods[] = {
- /* Device interface */
- DEVMETHOD(device_probe, plpar_pcibus_probe),
- /* IOMMU functions */
- DEVMETHOD(bus_get_dma_tag, plpar_pcibus_get_dma_tag),
- DEVMETHOD(iommu_map, phyp_iommu_map),
- DEVMETHOD(iommu_unmap, phyp_iommu_unmap),
- DEVMETHOD_END
- };
- static devclass_t pci_devclass;
- DEFINE_CLASS_1(pci, plpar_pcibus_driver, plpar_pcibus_methods,
- sizeof(struct pci_softc), ofw_pcibus_driver);
- DRIVER_MODULE(plpar_pcibus, pcib, plpar_pcibus_driver, pci_devclass, 0, 0);
- static int
- plpar_pcibus_probe(device_t dev)
- {
- phandle_t rtas;
- if (ofw_bus_get_node(dev) == -1 || !rtas_exists())
- return (ENXIO);
- rtas = OF_finddevice("/rtas");
- if (!OF_hasprop(rtas, "ibm,hypertas-functions"))
- return (ENXIO);
- device_set_desc(dev, "POWER Hypervisor PCI bus");
- return (BUS_PROBE_SPECIFIC);
- }
- static bus_dma_tag_t
- plpar_pcibus_get_dma_tag(device_t dev, device_t child)
- {
- struct ofw_pcibus_devinfo *dinfo;
- while (device_get_parent(child) != dev)
- child = device_get_parent(child);
- dinfo = device_get_ivars(child);
- if (dinfo->opd_dma_tag != NULL)
- return (dinfo->opd_dma_tag);
- bus_dma_tag_create(bus_get_dma_tag(dev),
- 1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
- NULL, NULL, BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED,
- BUS_SPACE_MAXSIZE, 0, NULL, NULL, &dinfo->opd_dma_tag);
- phyp_iommu_set_dma_tag(dev, child, dinfo->opd_dma_tag);
- return (dinfo->opd_dma_tag);
- }
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