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/*-
* BSD LICENSE
*
* Copyright(c) 2016 NXP
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of NXP nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* 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 DAMAGE.
*/
#include <stdio.h>
#include <string.h>
#include <sys/queue.h>
#include <rte_bus.h>
#include "eal_private.h"
struct rte_bus_list rte_bus_list =
TAILQ_HEAD_INITIALIZER(rte_bus_list);
void
rte_bus_register(struct rte_bus *bus)
{
RTE_VERIFY(bus);
RTE_VERIFY(bus->name && strlen(bus->name));
/* A bus should mandatorily have the scan implemented */
RTE_VERIFY(bus->scan);
RTE_VERIFY(bus->probe);
TAILQ_INSERT_TAIL(&rte_bus_list, bus, next);
RTE_LOG(DEBUG, EAL, "Registered [%s] bus.\n", bus->name);
}
void
rte_bus_unregister(struct rte_bus *bus)
{
TAILQ_REMOVE(&rte_bus_list, bus, next);
RTE_LOG(DEBUG, EAL, "Unregistered [%s] bus.\n", bus->name);
}
/* Scan all the buses for registered devices */
int
rte_bus_scan(void)
{
int ret;
struct rte_bus *bus = NULL;
TAILQ_FOREACH(bus, &rte_bus_list, next) {
ret = bus->scan();
if (ret) {
RTE_LOG(ERR, EAL, "Scan for (%s) bus failed.\n",
bus->name);
return ret;
}
}
return 0;
}
/* Probe all devices of all buses */
int
rte_bus_probe(void)
{
int ret;
struct rte_bus *bus, *vbus = NULL;
TAILQ_FOREACH(bus, &rte_bus_list, next) {
if (!strcmp(bus->name, "virtual")) {
vbus = bus;
continue;
}
ret = bus->probe();
if (ret) {
RTE_LOG(ERR, EAL, "Bus (%s) probe failed.\n",
bus->name);
return ret;
}
}
if (vbus) {
ret = vbus->probe();
if (ret) {
RTE_LOG(ERR, EAL, "Bus (%s) probe failed.\n",
vbus->name);
return ret;
}
}
return 0;
}
/* Dump information of a single bus */
static int
bus_dump_one(FILE *f, struct rte_bus *bus)
{
int ret;
/* For now, dump only the bus name */
ret = fprintf(f, " %s\n", bus->name);
/* Error in case of inability in writing to stream */
if (ret < 0)
return ret;
return 0;
}
void
rte_bus_dump(FILE *f)
{
int ret;
struct rte_bus *bus;
TAILQ_FOREACH(bus, &rte_bus_list, next) {
ret = bus_dump_one(f, bus);
if (ret) {
RTE_LOG(ERR, EAL, "Unable to write to stream (%d)\n",
ret);
break;
}
}
}
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