824b48eff3
This adds bhnd(4) bus-level support for querying backplane interrupt vector routing, and delegating machine/bridge-specific interrupt handling to the concrete bhnd(4) driver implementation. On bhndb(4) bridged PCI devices, we provide the PCI/MSI interrupt directly to attached cores. On MIPS devices, we report a backplane interrupt count of 0, effectively disabling the bus-level interrupt assignment. This allows mips/broadcom to temporarily continue using hard-coded MIPS IRQs until bhnd_mips PIC support is implemented. Reviewed by: mizhka Approved by: adrian (mentor, implicit)
146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
/*-
|
|
* 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("$FreeBSD$");
|
|
|
|
|
|
/*
|
|
* bhnd(4) driver mix-in providing shared common methods for
|
|
* bhnd bus devices attached via a root nexus.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/bhnd/bhnd_ids.h>
|
|
#include <dev/bhnd/cores/chipc/chipcreg.h>
|
|
|
|
#include "bhnd_nexusvar.h"
|
|
|
|
static const struct resource_spec bhnd_nexus_res_spec[] = {
|
|
{ SYS_RES_MEMORY, 0, RF_ACTIVE }, /* chipc registers */
|
|
{ -1, 0, 0 }
|
|
};
|
|
|
|
/**
|
|
* Map ChipCommon's register block and read the chip identifier data.
|
|
*
|
|
* @param dev A bhnd_nexus device.
|
|
* @param chipid On success, will be populated with the chip identifier.
|
|
* @retval 0 success
|
|
* @retval non-zero An error occurred reading the chip identifier..
|
|
*/
|
|
int
|
|
bhnd_nexus_read_chipid(device_t dev, struct bhnd_chipid *chipid)
|
|
{
|
|
struct resource_spec rspec[nitems(bhnd_nexus_res_spec)];
|
|
int error;
|
|
|
|
memcpy(rspec, bhnd_nexus_res_spec, sizeof(rspec));
|
|
error = bhnd_read_chipid(dev, rspec, 0, chipid);
|
|
if (error)
|
|
device_printf(dev, "error %d reading chip ID\n", error);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static bool
|
|
bhnd_nexus_is_hw_disabled(device_t dev, device_t child)
|
|
{
|
|
return (false);
|
|
}
|
|
|
|
static bhnd_attach_type
|
|
bhnd_nexus_get_attach_type(device_t dev, device_t child)
|
|
{
|
|
return (BHND_ATTACH_NATIVE);
|
|
}
|
|
|
|
static int
|
|
bhnd_nexus_activate_resource(device_t dev, device_t child, int type, int rid,
|
|
struct bhnd_resource *r)
|
|
{
|
|
int error;
|
|
|
|
/* Always direct */
|
|
if ((error = bus_activate_resource(child, type, rid, r->res)))
|
|
return (error);
|
|
|
|
r->direct = true;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bhnd_nexus_deactivate_resource(device_t dev, device_t child,
|
|
int type, int rid, struct bhnd_resource *r)
|
|
{
|
|
int error;
|
|
|
|
/* Always direct */
|
|
KASSERT(r->direct, ("indirect resource delegated to bhnd_nexus\n"));
|
|
|
|
if ((error = bus_deactivate_resource(child, type, rid, r->res)))
|
|
return (error);
|
|
|
|
r->direct = false;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bhnd_nexus_get_intr_count(device_t dev, device_t child)
|
|
{
|
|
// TODO: arch-specific interrupt handling.
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t bhnd_nexus_methods[] = {
|
|
/* bhnd interface */
|
|
DEVMETHOD(bhnd_bus_activate_resource, bhnd_nexus_activate_resource),
|
|
DEVMETHOD(bhnd_bus_deactivate_resource, bhnd_nexus_deactivate_resource),
|
|
DEVMETHOD(bhnd_bus_is_hw_disabled, bhnd_nexus_is_hw_disabled),
|
|
DEVMETHOD(bhnd_bus_get_attach_type, bhnd_nexus_get_attach_type),
|
|
|
|
DEVMETHOD(bhnd_bus_get_intr_count, bhnd_nexus_get_intr_count),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
DEFINE_CLASS_0(bhnd, bhnd_nexus_driver, bhnd_nexus_methods,
|
|
sizeof(struct bhnd_softc));
|