b7672a7025
controller to map PCI RID to an IOMMU specifier. Sponsored by: UKRI Discussed with: jhb Differential Revision: https://reviews.freebsd.org/D35129
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
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* Copyright (c) 2014 Sandvine Inc. All rights reserved.
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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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/*
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* Support functions for the PCI:PCI bridge driver. This has to be in a
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* separate file because kernel configurations end up referencing the functions
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* here even when pci support is compiled out of the kernel.
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*/
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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/malloc.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/systm.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/pcib_private.h>
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#include "pcib_if.h"
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int
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pcib_maxfuncs(device_t dev)
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{
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return (PCI_FUNCMAX);
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}
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int
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pcib_get_id(device_t pcib, device_t dev, enum pci_id_type type, uintptr_t *id)
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{
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uint8_t bus, slot, func;
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if (type == PCI_ID_OFW_IOMMU)
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return (PCI_GET_ID(device_get_parent(pcib), dev, type, id));
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if (type != PCI_ID_RID)
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return (ENXIO);
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bus = pci_get_bus(dev);
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slot = pci_get_slot(dev);
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func = pci_get_function(dev);
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*id = (PCI_RID(bus, slot, func));
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return (0);
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}
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void
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pcib_decode_rid(device_t pcib, uint16_t rid, int *bus, int *slot,
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int *func)
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{
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*bus = PCI_RID2BUS(rid);
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*slot = PCI_RID2SLOT(rid);
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*func = PCI_RID2FUNC(rid);
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}
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