mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-14 10:09:48 +00:00
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
142 lines
4.5 KiB
C
142 lines
4.5 KiB
C
/*-
|
|
* Copyright (c) 2016 Landon Fuller <landonf@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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kobj.h>
|
|
|
|
#include <dev/bhnd/bhndvar.h>
|
|
#include <dev/bhnd/bhnd_erom.h>
|
|
|
|
/**
|
|
* Allocate and return a new device enumeration table parser.
|
|
*
|
|
* @param cls The parser class for which an instance will be
|
|
* allocated.
|
|
* @param parent The parent device from which EROM resources should
|
|
* be allocated.
|
|
* @param rid The resource ID to be used when allocating EROM
|
|
* resources.
|
|
* @param cid The device's chip identifier.
|
|
*
|
|
* @retval non-NULL success
|
|
* @retval NULL if an error occured allocating or initializing the
|
|
* EROM parser.
|
|
*/
|
|
bhnd_erom_t *
|
|
bhnd_erom_alloc(bhnd_erom_class_t *cls, const struct bhnd_chipid *cid,
|
|
device_t parent, int rid)
|
|
{
|
|
bhnd_erom_t *erom;
|
|
int error;
|
|
|
|
erom = (bhnd_erom_t *)kobj_create((kobj_class_t)cls, M_BHND,
|
|
M_WAITOK|M_ZERO);
|
|
|
|
if ((error = BHND_EROM_INIT(erom, cid, parent, rid))) {
|
|
printf("error initializing %s parser at %#jx with "
|
|
"rid %d: %d\n", cls->name, (uintmax_t)cid->enum_addr, rid,
|
|
error);
|
|
|
|
kobj_delete((kobj_t)erom, M_BHND);
|
|
return (NULL);
|
|
}
|
|
|
|
return (erom);
|
|
}
|
|
|
|
/**
|
|
* Perform static initialization of aa device enumeration table parser using
|
|
* the provided bus space tag and handle.
|
|
*
|
|
* This may be used to initialize a caller-allocated erom instance state
|
|
* during early boot, prior to malloc availability.
|
|
*
|
|
* @param cls The parser class for which an instance will be
|
|
* allocated.
|
|
* @param erom The erom parser instance to initialize.
|
|
* @param esize The total available number of bytes allocated for
|
|
* @p erom. If this is less than is required by @p cls,
|
|
* ENOMEM will be returned.
|
|
* @param cid The device's chip identifier.
|
|
* @param bst Bus space tag.
|
|
* @param bsh Bus space handle mapping the device enumeration
|
|
* space.
|
|
*
|
|
* @retval 0 success
|
|
* @retval ENOMEM if @p esize is smaller than required by @p cls.
|
|
* @retval non-zero if an error occurs initializing the EROM parser,
|
|
* a regular unix error code will be returned.
|
|
*/
|
|
int
|
|
bhnd_erom_init_static(bhnd_erom_class_t *cls, bhnd_erom_t *erom, size_t esize,
|
|
const struct bhnd_chipid *cid, bus_space_tag_t bst, bus_space_handle_t bsh)
|
|
{
|
|
kobj_class_t kcls;
|
|
|
|
kcls = (kobj_class_t)cls;
|
|
|
|
/* Verify allocation size */
|
|
if (kcls->size > esize)
|
|
return (ENOMEM);
|
|
|
|
/* Perform instance initialization */
|
|
kobj_init_static((kobj_t)erom, kcls);
|
|
return (BHND_EROM_INIT_STATIC(erom, cid, bst, bsh));
|
|
}
|
|
|
|
/**
|
|
* Release any resources held by a @p erom parser previously
|
|
* initialized via bhnd_erom_init_static().
|
|
*
|
|
* @param erom An erom parser instance previously initialized via
|
|
* bhnd_erom_init_static().
|
|
*/
|
|
void
|
|
bhnd_erom_fini_static(bhnd_erom_t *erom)
|
|
{
|
|
return (BHND_EROM_FINI(erom));
|
|
}
|
|
|
|
/**
|
|
* Release all resources held by a @p erom parser previously
|
|
* allocated via bhnd_erom_alloc().
|
|
*
|
|
* @param erom An erom parser instance previously allocated via
|
|
* bhnd_erom_alloc().
|
|
*/
|
|
void
|
|
bhnd_erom_free(bhnd_erom_t *erom)
|
|
{
|
|
BHND_EROM_FINI(erom);
|
|
kobj_delete((kobj_t)erom, M_BHND);
|
|
}
|