caeff9a3c2
On BHND MIPS SoCs, this replaces the use of hard-coded MIPS IRQ#s in the common bhnd(4) core drivers; we now register an INTRNG child PIC that handles routing of backplane interrupt vectors via the MIPS core. On BHND PCI devices, backplane interrupt vectors are now routed to the PCI/PCIe host bridge core when bus_setup_intr() is called, where they are dispatched by the PCI core via a host interrupt (e.g. INTx/MSI). The bhndb(4) bridge driver tracks registered interrupt handlers for the bridged bhnd(4) devices and manages backplane interrupt routing, while delegating actual bus interrupt setup/teardown to the parent bus on behalf of the bridged cores. Approved by: adrian (mentor, implicit) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D12518
120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/*-
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* Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
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* Copyright (c) 2015-2016 Landon Fuller <landon@freebsd.org>
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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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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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/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <dev/bhnd/bhnd_ids.h>
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#include <dev/bhnd/bcma/bcmavar.h>
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#include <dev/bhnd/bcma/bcma_dmp.h>
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#include "bcm_mipsvar.h"
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#include "bcm_machdep.h"
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#include "bhnd_nexusvar.h"
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/*
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* Supports bcma(4) attachment to a MIPS nexus bus.
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*/
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static int bcma_nexus_attach(device_t);
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static int bcma_nexus_probe(device_t);
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_Static_assert(BCMA_OOB_NUM_BUSLINES == BCM_MIPS_NINTR, "BCMA incompatible "
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"with generic NINTR");
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static int
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bcma_nexus_probe(device_t dev)
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{
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int error;
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switch (bcm_get_platform()->cid.chip_type) {
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case BHND_CHIPTYPE_BCMA:
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case BHND_CHIPTYPE_BCMA_ALT:
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case BHND_CHIPTYPE_UBUS:
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break;
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default:
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return (ENXIO);
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}
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if ((error = bcma_probe(dev)) > 0)
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return (error);
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/* Set device description */
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bhnd_set_default_bus_desc(dev, &bcm_get_platform()->cid);
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return (BUS_PROBE_SPECIFIC);
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}
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static int
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bcma_nexus_attach(device_t dev)
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{
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int error;
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/* Perform initial attach and enumerate our children. */
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if ((error = bcma_attach(dev)))
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goto failed;
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/* Delegate remainder to standard bhnd method implementation */
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if ((error = bhnd_generic_attach(dev)))
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goto failed;
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return (0);
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failed:
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device_delete_children(dev);
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return (error);
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}
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static device_method_t bcma_nexus_methods[] = {
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DEVMETHOD(device_probe, bcma_nexus_probe),
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DEVMETHOD(device_attach, bcma_nexus_attach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_2(bhnd, bcma_nexus_driver, bcma_nexus_methods,
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sizeof(struct bcma_softc), bhnd_nexus_driver, bcma_driver);
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EARLY_DRIVER_MODULE(bcma_nexus, nexus, bcma_nexus_driver, bhnd_devclass, 0, 0,
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BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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