111d7cb2e3
Adds support for probing and initializing bhndb(4) bridge state using the bhnd_erom API, ensuring that full bridge configuration is available *prior* to actually attaching and enumerating the bhnd(4) child device, allowing us to safely allocate bus-level agent/device resources during bhnd(4) bus enumeration. - Add a bhnd_erom_probe() method usable by bhndb(4). This is an analogue to the existing bhnd_erom_probe_static() method, and allows the bhndb bridge to discover the best available erom parser class prior to newbus probing of its children. - Add support for supplying identification hints when probing erom devices. This is required on early EXTIF-only chipsets, where chip identification registers are not available. - Migrate bhndb over to the new bhnd_erom API, using bhnd_core_info records rather than bridged bhnd(4) device_t references to determine the bridged chipsets' capability/bridge configuration. - The bhndb parent (e.g. if_bwn) is now required to supply a hardware priority table to the bridge. The default table is currently sufficient for our supported devices. - Drop the two-pass attach approach we used for compatibility with bhndb(4) in the bhnd(4) bus drivers, and instead perform bus enumeration immediately, and allocate bridged per-child bus-level resources during that enumeration. Approved by: adrian (mentor) Differential Revision: https://reviews.freebsd.org/D7768
133 lines
3.7 KiB
C
133 lines
3.7 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/bhnd_nexusvar.h>
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#include <dev/bhnd/cores/chipc/chipcreg.h>
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#include "bcmavar.h"
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#include "bcma_eromreg.h"
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/*
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* Supports bcma(4) attachment to a 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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struct bcma_nexus_softc {
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struct bcma_softc parent_sc;
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struct bhnd_chipid bcma_cid;
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};
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static int
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bcma_nexus_probe(device_t dev)
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{
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struct bcma_nexus_softc *sc;
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int error;
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sc = device_get_softc(dev);
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/* Read the ChipCommon info using the hints the kernel
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* was compiled with. */
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if ((error = bhnd_nexus_read_chipid(dev, &sc->bcma_cid)))
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return (error);
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if (sc->bcma_cid.chip_type != BHND_CHIPTYPE_BCMA)
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return (ENXIO);
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if ((error = bcma_probe(dev)) > 0) {
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device_printf(dev, "error %d in probe\n", error);
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return (error);
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}
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/* Set device description */
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bhnd_set_default_bus_desc(dev, &sc->bcma_cid);
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return (0);
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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 const struct bhnd_chipid *
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bcma_nexus_get_chipid(device_t dev, device_t child) {
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struct bcma_nexus_softc *sc = device_get_softc(dev);
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return (&sc->bcma_cid);
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}
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static device_method_t bcma_nexus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, bcma_nexus_probe),
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DEVMETHOD(device_attach, bcma_nexus_attach),
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/* bhnd interface */
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DEVMETHOD(bhnd_bus_get_chipid, bcma_nexus_get_chipid),
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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_nexus_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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