4e0cac59aa
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
/*-
|
|
* Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
|
|
* Copyright (c) 2015-2016 Landon Fuller <landon@freebsd.org>
|
|
* 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,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
|
|
* redistribution must be conditioned upon including a substantially
|
|
* similar Disclaimer requirement for further binary redistribution.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/module.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <sys/rman.h>
|
|
#include <machine/resource.h>
|
|
|
|
#include <dev/bhnd/bhnd_ids.h>
|
|
#include <dev/bhnd/bhnd_nexusvar.h>
|
|
#include <dev/bhnd/cores/chipc/chipcreg.h>
|
|
|
|
#include "bcmavar.h"
|
|
#include "bcma_eromreg.h"
|
|
|
|
/*
|
|
* Supports bcma(4) attachment to a nexus bus.
|
|
*/
|
|
|
|
static int bcma_nexus_attach(device_t);
|
|
static int bcma_nexus_probe(device_t);
|
|
|
|
struct bcma_nexus_softc {
|
|
struct bcma_softc parent_sc;
|
|
struct bhnd_chipid bcma_cid;
|
|
};
|
|
|
|
static int
|
|
bcma_nexus_probe(device_t dev)
|
|
{
|
|
struct bcma_nexus_softc *sc;
|
|
int error;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
/* Read the ChipCommon info using the hints the kernel
|
|
* was compiled with. */
|
|
if ((error = bhnd_nexus_read_chipid(dev, &sc->bcma_cid)))
|
|
return (error);
|
|
|
|
if (sc->bcma_cid.chip_type != BHND_CHIPTYPE_BCMA)
|
|
return (ENXIO);
|
|
|
|
if ((error = bcma_probe(dev)) > 0) {
|
|
device_printf(dev, "error %d in probe\n", error);
|
|
return (error);
|
|
}
|
|
|
|
/* Set device description */
|
|
bhnd_set_default_bus_desc(dev, &sc->bcma_cid);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bcma_nexus_attach(device_t dev)
|
|
{
|
|
int error;
|
|
|
|
/* Perform initial attach and enumerate our children. */
|
|
if ((error = bcma_attach(dev)))
|
|
goto failed;
|
|
|
|
/* Delegate remainder to standard bhnd method implementation */
|
|
if ((error = bhnd_generic_attach(dev)))
|
|
goto failed;
|
|
|
|
return (0);
|
|
|
|
failed:
|
|
device_delete_children(dev);
|
|
return (error);
|
|
}
|
|
|
|
static const struct bhnd_chipid *
|
|
bcma_nexus_get_chipid(device_t dev, device_t child) {
|
|
struct bcma_nexus_softc *sc = device_get_softc(dev);
|
|
return (&sc->bcma_cid);
|
|
}
|
|
|
|
static device_method_t bcma_nexus_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, bcma_nexus_probe),
|
|
DEVMETHOD(device_attach, bcma_nexus_attach),
|
|
|
|
/* bhnd interface */
|
|
DEVMETHOD(bhnd_bus_get_chipid, bcma_nexus_get_chipid),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
DEFINE_CLASS_2(bhnd, bcma_nexus_driver, bcma_nexus_methods,
|
|
sizeof(struct bcma_nexus_softc), bhnd_nexus_driver, bcma_driver);
|
|
|
|
EARLY_DRIVER_MODULE(bcma_nexus, nexus, bcma_nexus_driver, bhnd_devclass, 0, 0,
|
|
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
|