601 lines
16 KiB
C
601 lines
16 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2016 Landon Fuller <landonf@FreeBSD.org>
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* Copyright (c) 2017 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by Landon Fuller
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* under sponsorship from the FreeBSD Foundation.
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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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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kobj.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/bhndreg.h>
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#include <dev/bhnd/bhndvar.h>
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#include <dev/bhnd/bhnd_erom.h>
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#include <dev/bhnd/bhnd_eromvar.h>
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#include <dev/bhnd/cores/chipc/chipcreg.h>
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static int bhnd_erom_iores_map(struct bhnd_erom_io *eio, bhnd_addr_t addr,
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bhnd_size_t size);
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static int bhnd_erom_iores_tell(struct bhnd_erom_io *eio,
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bhnd_addr_t *addr, bhnd_size_t *size);
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static uint32_t bhnd_erom_iores_read(struct bhnd_erom_io *eio,
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bhnd_size_t offset, u_int width);
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static void bhnd_erom_iores_fini(struct bhnd_erom_io *eio);
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static int bhnd_erom_iobus_map(struct bhnd_erom_io *eio, bhnd_addr_t addr,
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bhnd_size_t size);
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static int bhnd_erom_iobus_tell(struct bhnd_erom_io *eio,
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bhnd_addr_t *addr, bhnd_size_t *size);
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static uint32_t bhnd_erom_iobus_read(struct bhnd_erom_io *eio,
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bhnd_size_t offset, u_int width);
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/**
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* An implementation of bhnd_erom_io that manages mappings via
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* bhnd_alloc_resource() and bhnd_release_resource().
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*/
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struct bhnd_erom_iores {
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struct bhnd_erom_io eio;
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device_t owner; /**< device from which we'll allocate resources */
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int owner_rid; /**< rid to use when allocating new mappings */
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struct bhnd_resource *mapped; /**< current mapping, or NULL */
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int mapped_rid; /**< resource ID of current mapping, or -1 */
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};
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/**
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* Fetch the device enumeration parser class from all bhnd(4)-compatible drivers
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* registered for @p bus_devclass, probe @p eio for supporting parser classes,
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* and return the best available supporting enumeration parser class.
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*
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* @param bus_devclass The bus device class to be queried for
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* bhnd(4)-compatible drivers.
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* @param eio An erom bus I/O instance, configured with a
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* mapping of the first bus core.
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* @param hint Identification hint used to identify the device.
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* If the chipset supports standard chip
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* identification registers within the first core,
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* this parameter should be NULL.
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* @param[out] cid On success, the probed chip identifier.
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*
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* @retval non-NULL on success, the best available EROM class.
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* @retval NULL if no erom class returned a successful probe result for
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* @p eio.
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*/
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bhnd_erom_class_t *
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bhnd_erom_probe_driver_classes(devclass_t bus_devclass,
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struct bhnd_erom_io *eio, const struct bhnd_chipid *hint,
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struct bhnd_chipid *cid)
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{
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driver_t **drivers;
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int drv_count;
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bhnd_erom_class_t *erom_cls;
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int error, prio, result;
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erom_cls = NULL;
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prio = 0;
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/* Fetch all available drivers */
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error = devclass_get_drivers(bus_devclass, &drivers, &drv_count);
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if (error) {
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printf("error fetching bhnd(4) drivers for %s: %d\n",
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devclass_get_name(bus_devclass), error);
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return (NULL);
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}
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/* Enumerate the drivers looking for the best available EROM class */
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for (int i = 0; i < drv_count; i++) {
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struct bhnd_chipid pcid;
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bhnd_erom_class_t *cls;
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/* The default implementation of BHND_BUS_GET_EROM_CLASS()
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* returns NULL if unimplemented; this should always be safe
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* to call on arbitrary drivers */
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cls = bhnd_driver_get_erom_class(drivers[i]);
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if (cls == NULL)
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continue;
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kobj_class_compile(cls);
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/* Probe the bus */
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result = bhnd_erom_probe(cls, eio, hint, &pcid);
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/* The parser did not match if an error was returned */
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if (result > 0)
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continue;
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/* Check for a new highest priority match */
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if (erom_cls == NULL || result > prio) {
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prio = result;
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*cid = pcid;
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erom_cls = cls;
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}
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/* Terminate immediately on BUS_PROBE_SPECIFIC */
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if (result == BUS_PROBE_SPECIFIC)
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break;
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}
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free(drivers, M_TEMP);
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return (erom_cls);
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}
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/**
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* Allocate and return a new device enumeration table parser.
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*
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* @param cls The parser class for which an instance will be
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* allocated.
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* @param eio The bus I/O callbacks to use when reading the device
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* enumeration table.
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* @param cid The device's chip identifier.
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*
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* @retval non-NULL success
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* @retval NULL if an error occurred allocating or initializing the
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* EROM parser.
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*/
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bhnd_erom_t *
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bhnd_erom_alloc(bhnd_erom_class_t *cls, const struct bhnd_chipid *cid,
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struct bhnd_erom_io *eio)
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{
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bhnd_erom_t *erom;
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int error;
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erom = (bhnd_erom_t *)kobj_create((kobj_class_t)cls, M_BHND,
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M_WAITOK|M_ZERO);
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if ((error = BHND_EROM_INIT(erom, cid, eio))) {
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printf("error initializing %s parser at %#jx: %d\n", cls->name,
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(uintmax_t)cid->enum_addr, error);
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kobj_delete((kobj_t)erom, M_BHND);
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return (NULL);
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}
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return (erom);
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}
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/**
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* Perform static initialization of a device enumeration table parser.
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*
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* This may be used to initialize a caller-allocated erom instance state
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* during early boot, prior to malloc availability.
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*
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* @param cls The parser class for which an instance will be
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* allocated.
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* @param erom The erom parser instance to initialize.
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* @param esize The total available number of bytes allocated for
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* @p erom. If this is less than is required by @p cls,
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* ENOMEM will be returned.
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* @param cid The device's chip identifier.
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* @param eio The bus I/O callbacks to use when reading the device
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* enumeration table.
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*
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* @retval 0 success
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* @retval ENOMEM if @p esize is smaller than required by @p cls.
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* @retval non-zero if an error occurs initializing the EROM parser,
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* a regular unix error code will be returned.
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*/
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int
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bhnd_erom_init_static(bhnd_erom_class_t *cls, bhnd_erom_t *erom, size_t esize,
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const struct bhnd_chipid *cid, struct bhnd_erom_io *eio)
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{
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kobj_class_t kcls;
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kcls = (kobj_class_t)cls;
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/* Verify allocation size */
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if (kcls->size > esize)
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return (ENOMEM);
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/* Perform instance initialization */
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kobj_init_static((kobj_t)erom, kcls);
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return (BHND_EROM_INIT(erom, cid, eio));
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}
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/**
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* Release any resources held by a @p erom parser previously
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* initialized via bhnd_erom_init_static().
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*
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* @param erom An erom parser instance previously initialized via
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* bhnd_erom_init_static().
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*/
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void
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bhnd_erom_fini_static(bhnd_erom_t *erom)
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{
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return (BHND_EROM_FINI(erom));
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}
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/**
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* Release all resources held by a @p erom parser previously
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* allocated via bhnd_erom_alloc().
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*
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* @param erom An erom parser instance previously allocated via
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* bhnd_erom_alloc().
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*/
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void
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bhnd_erom_free(bhnd_erom_t *erom)
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{
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BHND_EROM_FINI(erom);
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kobj_delete((kobj_t)erom, M_BHND);
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}
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/**
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* Read the chip identification registers mapped by @p eio, popuating @p cid
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* with the parsed result
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*
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* @param eio A bus I/O instance, configured with a mapping
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* of the ChipCommon core.
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* @param[out] cid On success, the parsed chip identification.
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*
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* @warning
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* On early siba(4) devices, the ChipCommon core does not provide
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* a valid CHIPC_ID_NUMCORE field. On these ChipCommon revisions
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* (see CHIPC_NCORES_MIN_HWREV()), this function will parse and return
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* an invalid `ncores` value.
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*/
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int
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bhnd_erom_read_chipid(struct bhnd_erom_io *eio, struct bhnd_chipid *cid)
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{
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bhnd_addr_t cc_addr;
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bhnd_size_t cc_size;
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uint32_t idreg, cc_caps;
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int error;
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/* Fetch ChipCommon address */
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if ((error = bhnd_erom_io_tell(eio, &cc_addr, &cc_size)))
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return (error);
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/* Read chip identifier */
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idreg = bhnd_erom_io_read(eio, CHIPC_ID, 4);
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/* Extract the basic chip info */
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cid->chip_id = CHIPC_GET_BITS(idreg, CHIPC_ID_CHIP);
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cid->chip_pkg = CHIPC_GET_BITS(idreg, CHIPC_ID_PKG);
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cid->chip_rev = CHIPC_GET_BITS(idreg, CHIPC_ID_REV);
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cid->chip_type = CHIPC_GET_BITS(idreg, CHIPC_ID_BUS);
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cid->ncores = CHIPC_GET_BITS(idreg, CHIPC_ID_NUMCORE);
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/* Populate EROM address */
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if (BHND_CHIPTYPE_HAS_EROM(cid->chip_type)) {
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cid->enum_addr = bhnd_erom_io_read(eio, CHIPC_EROMPTR, 4);
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} else {
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cid->enum_addr = cc_addr;
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}
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/* Populate capability flags */
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cc_caps = bhnd_erom_io_read(eio, CHIPC_CAPABILITIES, 4);
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cid->chip_caps = 0x0;
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if (cc_caps & CHIPC_CAP_BKPLN64)
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cid->chip_caps |= BHND_CAP_BP64;
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if (cc_caps & CHIPC_CAP_PMU)
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cid->chip_caps |= BHND_CAP_PMU;
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return (0);
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}
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/**
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* Attempt to map @p size bytes at @p addr, replacing any existing
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* @p eio mapping.
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*
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* @param eio I/O instance state.
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* @param addr The address to be mapped.
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* @param size The number of bytes to be mapped at @p addr.
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*
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* @retval 0 success
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* @retval non-zero if mapping @p addr otherwise fails, a regular
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* unix error code should be returned.
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*/
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int
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bhnd_erom_io_map(struct bhnd_erom_io *eio, bhnd_addr_t addr, bhnd_size_t size)
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{
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return (eio->map(eio, addr, size));
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}
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/**
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* Return the address range mapped by @p eio, if any.
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*
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* @param eio I/O instance state.
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* @param[out] addr The address mapped by @p eio.
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* @param[out] size The number of bytes mapped at @p addr.
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*
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* @retval 0 success
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* @retval ENXIO if @p eio has no mapping.
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*/
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int
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bhnd_erom_io_tell(struct bhnd_erom_io *eio, bhnd_addr_t *addr,
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bhnd_size_t *size)
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{
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return (eio->tell(eio, addr, size));
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}
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/**
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* Read a 1, 2, or 4 byte data item from @p eio, at the given @p offset
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* relative to @p eio's current mapping.
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*
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* @param eio erom I/O callbacks
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* @param offset read offset.
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* @param width item width (1, 2, or 4 bytes).
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*/
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uint32_t
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bhnd_erom_io_read(struct bhnd_erom_io *eio, bhnd_size_t offset, u_int width)
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{
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return (eio->read(eio, offset, width));
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}
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/**
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* Free all resources held by @p eio.
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*/
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void
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bhnd_erom_io_fini(struct bhnd_erom_io *eio)
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{
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if (eio->fini != NULL)
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return (eio->fini(eio));
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}
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/**
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* Allocate, initialize, and return a new I/O instance that will perform
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* mapping by allocating SYS_RES_MEMORY resources from @p dev using @p rid.
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*
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* @param dev The device to pass to bhnd_alloc_resource() and
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* bhnd_release_resource() functions.
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* @param rid The resource ID to be used when allocating memory resources.
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*/
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struct bhnd_erom_io *
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bhnd_erom_iores_new(device_t dev, int rid)
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{
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struct bhnd_erom_iores *iores;
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iores = malloc(sizeof(*iores), M_BHND, M_WAITOK | M_ZERO);
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iores->eio.map = bhnd_erom_iores_map;
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iores->eio.tell = bhnd_erom_iores_tell;
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iores->eio.read = bhnd_erom_iores_read;
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iores->eio.fini = bhnd_erom_iores_fini;
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iores->owner = dev;
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iores->owner_rid = rid;
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iores->mapped = NULL;
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iores->mapped_rid = -1;
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return (&iores->eio);
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}
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static int
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bhnd_erom_iores_map(struct bhnd_erom_io *eio, bhnd_addr_t addr,
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bhnd_size_t size)
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{
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struct bhnd_erom_iores *iores;
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iores = (struct bhnd_erom_iores *)eio;
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/* Sanity check the addr/size */
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if (size == 0)
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return (EINVAL);
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if (BHND_ADDR_MAX - size < addr)
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return (EINVAL); /* would overflow */
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/* Check for an existing mapping */
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if (iores->mapped) {
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/* If already mapped, nothing else to do */
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if (rman_get_start(iores->mapped->res) == addr &&
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rman_get_size(iores->mapped->res) == size)
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{
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return (0);
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}
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/* Otherwise, we need to drop the existing mapping */
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bhnd_release_resource(iores->owner, SYS_RES_MEMORY,
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iores->mapped_rid, iores->mapped);
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iores->mapped = NULL;
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iores->mapped_rid = -1;
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}
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/* Try to allocate the new mapping */
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iores->mapped_rid = iores->owner_rid;
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iores->mapped = bhnd_alloc_resource(iores->owner, SYS_RES_MEMORY,
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&iores->mapped_rid, addr, addr+size-1, size,
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RF_ACTIVE|RF_SHAREABLE);
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if (iores->mapped == NULL) {
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iores->mapped_rid = -1;
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return (ENXIO);
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}
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return (0);
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}
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static int
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bhnd_erom_iores_tell(struct bhnd_erom_io *eio, bhnd_addr_t *addr,
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bhnd_size_t *size)
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{
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struct bhnd_erom_iores *iores = (struct bhnd_erom_iores *)eio;
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if (iores->mapped == NULL)
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return (ENXIO);
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*addr = rman_get_start(iores->mapped->res);
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*size = rman_get_size(iores->mapped->res);
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return (0);
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}
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static uint32_t
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bhnd_erom_iores_read(struct bhnd_erom_io *eio, bhnd_size_t offset, u_int width)
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{
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struct bhnd_erom_iores *iores = (struct bhnd_erom_iores *)eio;
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if (iores->mapped == NULL)
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panic("read with invalid mapping");
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switch (width) {
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case 1:
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return (bhnd_bus_read_1(iores->mapped, offset));
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case 2:
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return (bhnd_bus_read_2(iores->mapped, offset));
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case 4:
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return (bhnd_bus_read_4(iores->mapped, offset));
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default:
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panic("invalid width %u", width);
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}
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}
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static void
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bhnd_erom_iores_fini(struct bhnd_erom_io *eio)
|
|
{
|
|
struct bhnd_erom_iores *iores = (struct bhnd_erom_iores *)eio;
|
|
|
|
/* Release any mapping */
|
|
if (iores->mapped) {
|
|
bhnd_release_resource(iores->owner, SYS_RES_MEMORY,
|
|
iores->mapped_rid, iores->mapped);
|
|
iores->mapped = NULL;
|
|
iores->mapped_rid = -1;
|
|
}
|
|
|
|
free(eio, M_BHND);
|
|
}
|
|
|
|
/**
|
|
* Initialize an I/O instance that will perform mapping directly from the
|
|
* given bus space tag and handle.
|
|
*
|
|
* @param iobus The I/O instance to be initialized.
|
|
* @param addr The base address mapped by @p bsh.
|
|
* @param size The total size mapped by @p bsh.
|
|
* @param bst Bus space tag for @p bsh.
|
|
* @param bsh Bus space handle mapping the full bus enumeration space.
|
|
*
|
|
* @retval 0 success
|
|
* @retval non-zero if initializing @p iobus otherwise fails, a regular
|
|
* unix error code will be returned.
|
|
*/
|
|
int
|
|
bhnd_erom_iobus_init(struct bhnd_erom_iobus *iobus, bhnd_addr_t addr,
|
|
bhnd_size_t size, bus_space_tag_t bst, bus_space_handle_t bsh)
|
|
{
|
|
iobus->eio.map = bhnd_erom_iobus_map;
|
|
iobus->eio.tell = bhnd_erom_iobus_tell;
|
|
iobus->eio.read = bhnd_erom_iobus_read;
|
|
iobus->eio.fini = NULL;
|
|
|
|
iobus->addr = addr;
|
|
iobus->size = size;
|
|
iobus->bst = bst;
|
|
iobus->bsh = bsh;
|
|
iobus->mapped = false;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bhnd_erom_iobus_map(struct bhnd_erom_io *eio, bhnd_addr_t addr,
|
|
bhnd_size_t size)
|
|
{
|
|
struct bhnd_erom_iobus *iobus = (struct bhnd_erom_iobus *)eio;
|
|
|
|
/* Sanity check the addr/size */
|
|
if (size == 0)
|
|
return (EINVAL);
|
|
|
|
/* addr+size must not overflow */
|
|
if (BHND_ADDR_MAX - size < addr)
|
|
return (EINVAL);
|
|
|
|
/* addr/size must fit within our bus tag's mapping */
|
|
if (addr < iobus->addr || size > iobus->size)
|
|
return (ENXIO);
|
|
|
|
if (iobus->size - (addr - iobus->addr) < size)
|
|
return (ENXIO);
|
|
|
|
/* The new addr offset and size must be representible as a bus_size_t */
|
|
if ((addr - iobus->addr) > BUS_SPACE_MAXSIZE)
|
|
return (ENXIO);
|
|
|
|
if (size > BUS_SPACE_MAXSIZE)
|
|
return (ENXIO);
|
|
|
|
iobus->offset = addr - iobus->addr;
|
|
iobus->limit = size;
|
|
iobus->mapped = true;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bhnd_erom_iobus_tell(struct bhnd_erom_io *eio, bhnd_addr_t *addr,
|
|
bhnd_size_t *size)
|
|
{
|
|
struct bhnd_erom_iobus *iobus = (struct bhnd_erom_iobus *)eio;
|
|
|
|
if (!iobus->mapped)
|
|
return (ENXIO);
|
|
|
|
*addr = iobus->addr + iobus->offset;
|
|
*size = iobus->limit;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static uint32_t
|
|
bhnd_erom_iobus_read(struct bhnd_erom_io *eio, bhnd_size_t offset, u_int width)
|
|
{
|
|
struct bhnd_erom_iobus *iobus = (struct bhnd_erom_iobus *)eio;
|
|
|
|
if (!iobus->mapped)
|
|
panic("no active mapping");
|
|
|
|
if (iobus->limit < width || iobus->limit - width < offset)
|
|
panic("invalid offset %#jx", offset);
|
|
|
|
switch (width) {
|
|
case 1:
|
|
return (bus_space_read_1(iobus->bst, iobus->bsh,
|
|
iobus->offset + offset));
|
|
case 2:
|
|
return (bus_space_read_2(iobus->bst, iobus->bsh,
|
|
iobus->offset + offset));
|
|
case 4:
|
|
return (bus_space_read_4(iobus->bst, iobus->bsh,
|
|
iobus->offset + offset));
|
|
default:
|
|
panic("invalid width %u", width);
|
|
}
|
|
}
|