7d1fb1aadc
- Delete all chipc children on attachment failure. - Added missing bhnd_nexus bhnd_bus_deactivate_resource implementation. - Drop a CHIPC_UNLOCK() accidentally left behind after lifting synchronization into the chipc region refcounting API. - Fix re-allocation of chipc resources. Previously, the resource ID was reset to -1 on release, preventing later re-allocation. Approved by: re (gjb), adrian (mentor) Differential Revision: https://reviews.freebsd.org/D6849
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*-
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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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/*
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* bhnd(4) driver mix-in providing shared common methods for
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* bhnd bus devices attached via a root nexus.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <dev/bhnd/bhnd_ids.h>
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#include <dev/bhnd/cores/chipc/chipcreg.h>
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#include "bhnd_nexusvar.h"
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static const struct resource_spec bhnd_nexus_res_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE }, /* chipc registers */
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{ -1, 0, 0 }
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};
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/**
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* Map ChipCommon's register block and read the chip identifier data.
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*
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* @param dev A bhnd_nexus device.
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* @param chipid On success, will be populated with the chip identifier.
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* @retval 0 success
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* @retval non-zero An error occurred reading the chip identifier..
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*/
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int
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bhnd_nexus_read_chipid(device_t dev, struct bhnd_chipid *chipid)
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{
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struct resource_spec rspec[nitems(bhnd_nexus_res_spec)];
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int error;
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memcpy(rspec, bhnd_nexus_res_spec, sizeof(rspec));
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error = bhnd_read_chipid(dev, rspec, 0, chipid);
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if (error)
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device_printf(dev, "error %d reading chip ID\n", error);
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return (error);
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}
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static bool
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bhnd_nexus_is_hw_disabled(device_t dev, device_t child)
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{
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return false;
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}
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static bhnd_attach_type
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bhnd_nexus_get_attach_type(device_t dev, device_t child)
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{
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return (BHND_ATTACH_NATIVE);
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}
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static int
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bhnd_nexus_activate_resource(device_t dev, device_t child, int type, int rid,
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struct bhnd_resource *r)
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{
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int error;
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/* Always direct */
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if ((error = bus_activate_resource(child, type, rid, r->res)))
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return (error);
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r->direct = true;
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return (0);
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}
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static int
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bhnd_nexus_deactivate_resource(device_t dev, device_t child,
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int type, int rid, struct bhnd_resource *r)
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{
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int error;
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/* Always direct */
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KASSERT(r->direct, ("indirect resource delegated to bhnd_nexus\n"));
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if ((error = bus_deactivate_resource(child, type, rid, r->res)))
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return (error);
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r->direct = false;
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return (0);
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}
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static device_method_t bhnd_nexus_methods[] = {
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/* bhnd interface */
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DEVMETHOD(bhnd_bus_activate_resource, bhnd_nexus_activate_resource),
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DEVMETHOD(bhnd_bus_deactivate_resource, bhnd_nexus_deactivate_resource),
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DEVMETHOD(bhnd_bus_is_hw_disabled, bhnd_nexus_is_hw_disabled),
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DEVMETHOD(bhnd_bus_get_attach_type, bhnd_nexus_get_attach_type),
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DEVMETHOD_END
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};
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DEFINE_CLASS_0(bhnd, bhnd_nexus_driver, bhnd_nexus_methods,
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sizeof(struct bhnd_softc));
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