1786 lines
38 KiB
C
1786 lines
38 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* DSA topology and switch handling
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*
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* Copyright (c) 2008-2009 Marvell Semiconductor
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* Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
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* Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch>
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/slab.h>
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#include <linux/rtnetlink.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <net/dsa_stubs.h>
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#include <net/sch_generic.h>
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#include "conduit.h"
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#include "devlink.h"
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#include "dsa.h"
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#include "netlink.h"
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#include "port.h"
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#include "switch.h"
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#include "tag.h"
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#include "user.h"
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#define DSA_MAX_NUM_OFFLOADING_BRIDGES BITS_PER_LONG
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static DEFINE_MUTEX(dsa2_mutex);
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LIST_HEAD(dsa_tree_list);
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static struct workqueue_struct *dsa_owq;
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/* Track the bridges with forwarding offload enabled */
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static unsigned long dsa_fwd_offloading_bridges;
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bool dsa_schedule_work(struct work_struct *work)
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{
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return queue_work(dsa_owq, work);
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}
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void dsa_flush_workqueue(void)
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{
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flush_workqueue(dsa_owq);
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}
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EXPORT_SYMBOL_GPL(dsa_flush_workqueue);
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/**
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* dsa_lag_map() - Map LAG structure to a linear LAG array
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* @dst: Tree in which to record the mapping.
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* @lag: LAG structure that is to be mapped to the tree's array.
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*
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* dsa_lag_id/dsa_lag_by_id can then be used to translate between the
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* two spaces. The size of the mapping space is determined by the
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* driver by setting ds->num_lag_ids. It is perfectly legal to leave
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* it unset if it is not needed, in which case these functions become
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* no-ops.
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*/
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void dsa_lag_map(struct dsa_switch_tree *dst, struct dsa_lag *lag)
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{
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unsigned int id;
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for (id = 1; id <= dst->lags_len; id++) {
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if (!dsa_lag_by_id(dst, id)) {
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dst->lags[id - 1] = lag;
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lag->id = id;
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return;
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}
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}
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/* No IDs left, which is OK. Some drivers do not need it. The
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* ones that do, e.g. mv88e6xxx, will discover that dsa_lag_id
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* returns an error for this device when joining the LAG. The
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* driver can then return -EOPNOTSUPP back to DSA, which will
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* fall back to a software LAG.
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*/
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}
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/**
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* dsa_lag_unmap() - Remove a LAG ID mapping
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* @dst: Tree in which the mapping is recorded.
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* @lag: LAG structure that was mapped.
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*
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* As there may be multiple users of the mapping, it is only removed
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* if there are no other references to it.
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*/
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void dsa_lag_unmap(struct dsa_switch_tree *dst, struct dsa_lag *lag)
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{
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unsigned int id;
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dsa_lags_foreach_id(id, dst) {
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if (dsa_lag_by_id(dst, id) == lag) {
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dst->lags[id - 1] = NULL;
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lag->id = 0;
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break;
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}
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}
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}
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struct dsa_lag *dsa_tree_lag_find(struct dsa_switch_tree *dst,
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const struct net_device *lag_dev)
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{
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dsa_port_lag_dev_get(dp) == lag_dev)
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return dp->lag;
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return NULL;
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}
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struct dsa_bridge *dsa_tree_bridge_find(struct dsa_switch_tree *dst,
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const struct net_device *br)
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{
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dsa_port_bridge_dev_get(dp) == br)
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return dp->bridge;
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return NULL;
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}
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static int dsa_bridge_num_find(const struct net_device *bridge_dev)
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{
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struct dsa_switch_tree *dst;
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list_for_each_entry(dst, &dsa_tree_list, list) {
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struct dsa_bridge *bridge;
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bridge = dsa_tree_bridge_find(dst, bridge_dev);
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if (bridge)
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return bridge->num;
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}
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return 0;
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}
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unsigned int dsa_bridge_num_get(const struct net_device *bridge_dev, int max)
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{
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unsigned int bridge_num = dsa_bridge_num_find(bridge_dev);
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/* Switches without FDB isolation support don't get unique
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* bridge numbering
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*/
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if (!max)
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return 0;
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if (!bridge_num) {
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/* First port that requests FDB isolation or TX forwarding
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* offload for this bridge
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*/
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bridge_num = find_next_zero_bit(&dsa_fwd_offloading_bridges,
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DSA_MAX_NUM_OFFLOADING_BRIDGES,
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1);
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if (bridge_num >= max)
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return 0;
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set_bit(bridge_num, &dsa_fwd_offloading_bridges);
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}
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return bridge_num;
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}
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void dsa_bridge_num_put(const struct net_device *bridge_dev,
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unsigned int bridge_num)
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{
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/* Since we refcount bridges, we know that when we call this function
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* it is no longer in use, so we can just go ahead and remove it from
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* the bit mask.
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*/
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clear_bit(bridge_num, &dsa_fwd_offloading_bridges);
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}
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struct dsa_switch *dsa_switch_find(int tree_index, int sw_index)
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{
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struct dsa_switch_tree *dst;
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struct dsa_port *dp;
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list_for_each_entry(dst, &dsa_tree_list, list) {
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if (dst->index != tree_index)
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continue;
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list_for_each_entry(dp, &dst->ports, list) {
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if (dp->ds->index != sw_index)
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continue;
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return dp->ds;
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}
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}
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return NULL;
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}
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EXPORT_SYMBOL_GPL(dsa_switch_find);
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static struct dsa_switch_tree *dsa_tree_find(int index)
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{
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struct dsa_switch_tree *dst;
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list_for_each_entry(dst, &dsa_tree_list, list)
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if (dst->index == index)
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return dst;
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return NULL;
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}
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static struct dsa_switch_tree *dsa_tree_alloc(int index)
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{
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struct dsa_switch_tree *dst;
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dst = kzalloc(sizeof(*dst), GFP_KERNEL);
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if (!dst)
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return NULL;
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dst->index = index;
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INIT_LIST_HEAD(&dst->rtable);
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INIT_LIST_HEAD(&dst->ports);
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INIT_LIST_HEAD(&dst->list);
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list_add_tail(&dst->list, &dsa_tree_list);
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kref_init(&dst->refcount);
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return dst;
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}
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static void dsa_tree_free(struct dsa_switch_tree *dst)
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{
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if (dst->tag_ops)
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dsa_tag_driver_put(dst->tag_ops);
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list_del(&dst->list);
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kfree(dst);
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}
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static struct dsa_switch_tree *dsa_tree_get(struct dsa_switch_tree *dst)
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{
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if (dst)
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kref_get(&dst->refcount);
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return dst;
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}
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static struct dsa_switch_tree *dsa_tree_touch(int index)
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{
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struct dsa_switch_tree *dst;
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dst = dsa_tree_find(index);
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if (dst)
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return dsa_tree_get(dst);
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else
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return dsa_tree_alloc(index);
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}
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static void dsa_tree_release(struct kref *ref)
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{
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struct dsa_switch_tree *dst;
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dst = container_of(ref, struct dsa_switch_tree, refcount);
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dsa_tree_free(dst);
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}
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static void dsa_tree_put(struct dsa_switch_tree *dst)
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{
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if (dst)
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kref_put(&dst->refcount, dsa_tree_release);
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}
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static struct dsa_port *dsa_tree_find_port_by_node(struct dsa_switch_tree *dst,
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struct device_node *dn)
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{
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dp->dn == dn)
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return dp;
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return NULL;
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}
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static struct dsa_link *dsa_link_touch(struct dsa_port *dp,
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struct dsa_port *link_dp)
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{
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struct dsa_switch *ds = dp->ds;
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struct dsa_switch_tree *dst;
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struct dsa_link *dl;
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dst = ds->dst;
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list_for_each_entry(dl, &dst->rtable, list)
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if (dl->dp == dp && dl->link_dp == link_dp)
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return dl;
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dl = kzalloc(sizeof(*dl), GFP_KERNEL);
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if (!dl)
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return NULL;
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dl->dp = dp;
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dl->link_dp = link_dp;
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INIT_LIST_HEAD(&dl->list);
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list_add_tail(&dl->list, &dst->rtable);
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return dl;
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}
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static bool dsa_port_setup_routing_table(struct dsa_port *dp)
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{
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struct dsa_switch *ds = dp->ds;
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struct dsa_switch_tree *dst = ds->dst;
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struct device_node *dn = dp->dn;
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struct of_phandle_iterator it;
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struct dsa_port *link_dp;
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struct dsa_link *dl;
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int err;
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of_for_each_phandle(&it, err, dn, "link", NULL, 0) {
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link_dp = dsa_tree_find_port_by_node(dst, it.node);
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if (!link_dp) {
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of_node_put(it.node);
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return false;
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}
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dl = dsa_link_touch(dp, link_dp);
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if (!dl) {
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of_node_put(it.node);
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return false;
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}
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}
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return true;
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}
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static bool dsa_tree_setup_routing_table(struct dsa_switch_tree *dst)
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{
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bool complete = true;
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list) {
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if (dsa_port_is_dsa(dp)) {
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complete = dsa_port_setup_routing_table(dp);
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if (!complete)
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break;
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}
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}
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return complete;
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}
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static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst)
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{
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dsa_port_is_cpu(dp))
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return dp;
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return NULL;
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}
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struct net_device *dsa_tree_find_first_conduit(struct dsa_switch_tree *dst)
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{
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struct device_node *ethernet;
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struct net_device *conduit;
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struct dsa_port *cpu_dp;
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cpu_dp = dsa_tree_find_first_cpu(dst);
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ethernet = of_parse_phandle(cpu_dp->dn, "ethernet", 0);
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conduit = of_find_net_device_by_node(ethernet);
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of_node_put(ethernet);
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return conduit;
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}
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/* Assign the default CPU port (the first one in the tree) to all ports of the
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* fabric which don't already have one as part of their own switch.
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*/
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static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst)
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{
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struct dsa_port *cpu_dp, *dp;
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cpu_dp = dsa_tree_find_first_cpu(dst);
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if (!cpu_dp) {
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pr_err("DSA: tree %d has no CPU port\n", dst->index);
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return -EINVAL;
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}
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list_for_each_entry(dp, &dst->ports, list) {
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if (dp->cpu_dp)
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continue;
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if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
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dp->cpu_dp = cpu_dp;
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}
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return 0;
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}
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static struct dsa_port *
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dsa_switch_preferred_default_local_cpu_port(struct dsa_switch *ds)
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{
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struct dsa_port *cpu_dp;
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if (!ds->ops->preferred_default_local_cpu_port)
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return NULL;
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cpu_dp = ds->ops->preferred_default_local_cpu_port(ds);
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if (!cpu_dp)
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return NULL;
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if (WARN_ON(!dsa_port_is_cpu(cpu_dp) || cpu_dp->ds != ds))
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return NULL;
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return cpu_dp;
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}
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/* Perform initial assignment of CPU ports to user ports and DSA links in the
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* fabric, giving preference to CPU ports local to each switch. Default to
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* using the first CPU port in the switch tree if the port does not have a CPU
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* port local to this switch.
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*/
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static int dsa_tree_setup_cpu_ports(struct dsa_switch_tree *dst)
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{
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struct dsa_port *preferred_cpu_dp, *cpu_dp, *dp;
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list_for_each_entry(cpu_dp, &dst->ports, list) {
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if (!dsa_port_is_cpu(cpu_dp))
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continue;
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preferred_cpu_dp = dsa_switch_preferred_default_local_cpu_port(cpu_dp->ds);
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if (preferred_cpu_dp && preferred_cpu_dp != cpu_dp)
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continue;
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/* Prefer a local CPU port */
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dsa_switch_for_each_port(dp, cpu_dp->ds) {
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/* Prefer the first local CPU port found */
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if (dp->cpu_dp)
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continue;
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if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
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dp->cpu_dp = cpu_dp;
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}
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}
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return dsa_tree_setup_default_cpu(dst);
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}
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static void dsa_tree_teardown_cpu_ports(struct dsa_switch_tree *dst)
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{
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struct dsa_port *dp;
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list_for_each_entry(dp, &dst->ports, list)
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if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
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dp->cpu_dp = NULL;
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}
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static int dsa_port_setup(struct dsa_port *dp)
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{
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bool dsa_port_link_registered = false;
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struct dsa_switch *ds = dp->ds;
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bool dsa_port_enabled = false;
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int err = 0;
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if (dp->setup)
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return 0;
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err = dsa_port_devlink_setup(dp);
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if (err)
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return err;
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switch (dp->type) {
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case DSA_PORT_TYPE_UNUSED:
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dsa_port_disable(dp);
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break;
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case DSA_PORT_TYPE_CPU:
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if (dp->dn) {
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err = dsa_shared_port_link_register_of(dp);
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if (err)
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break;
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dsa_port_link_registered = true;
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} else {
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dev_warn(ds->dev,
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"skipping link registration for CPU port %d\n",
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dp->index);
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}
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err = dsa_port_enable(dp, NULL);
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if (err)
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break;
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dsa_port_enabled = true;
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break;
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case DSA_PORT_TYPE_DSA:
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if (dp->dn) {
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err = dsa_shared_port_link_register_of(dp);
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if (err)
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break;
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dsa_port_link_registered = true;
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} else {
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dev_warn(ds->dev,
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"skipping link registration for DSA port %d\n",
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dp->index);
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}
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err = dsa_port_enable(dp, NULL);
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if (err)
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break;
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dsa_port_enabled = true;
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break;
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case DSA_PORT_TYPE_USER:
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of_get_mac_address(dp->dn, dp->mac);
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err = dsa_user_create(dp);
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break;
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}
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if (err && dsa_port_enabled)
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dsa_port_disable(dp);
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if (err && dsa_port_link_registered)
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dsa_shared_port_link_unregister_of(dp);
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if (err) {
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dsa_port_devlink_teardown(dp);
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return err;
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}
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dp->setup = true;
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return 0;
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}
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static void dsa_port_teardown(struct dsa_port *dp)
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{
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if (!dp->setup)
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return;
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switch (dp->type) {
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case DSA_PORT_TYPE_UNUSED:
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break;
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case DSA_PORT_TYPE_CPU:
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dsa_port_disable(dp);
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if (dp->dn)
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dsa_shared_port_link_unregister_of(dp);
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break;
|
|
case DSA_PORT_TYPE_DSA:
|
|
dsa_port_disable(dp);
|
|
if (dp->dn)
|
|
dsa_shared_port_link_unregister_of(dp);
|
|
break;
|
|
case DSA_PORT_TYPE_USER:
|
|
if (dp->user) {
|
|
dsa_user_destroy(dp->user);
|
|
dp->user = NULL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
dsa_port_devlink_teardown(dp);
|
|
|
|
dp->setup = false;
|
|
}
|
|
|
|
static int dsa_port_setup_as_unused(struct dsa_port *dp)
|
|
{
|
|
dp->type = DSA_PORT_TYPE_UNUSED;
|
|
return dsa_port_setup(dp);
|
|
}
|
|
|
|
static int dsa_switch_setup_tag_protocol(struct dsa_switch *ds)
|
|
{
|
|
const struct dsa_device_ops *tag_ops = ds->dst->tag_ops;
|
|
struct dsa_switch_tree *dst = ds->dst;
|
|
int err;
|
|
|
|
if (tag_ops->proto == dst->default_proto)
|
|
goto connect;
|
|
|
|
rtnl_lock();
|
|
err = ds->ops->change_tag_protocol(ds, tag_ops->proto);
|
|
rtnl_unlock();
|
|
if (err) {
|
|
dev_err(ds->dev, "Unable to use tag protocol \"%s\": %pe\n",
|
|
tag_ops->name, ERR_PTR(err));
|
|
return err;
|
|
}
|
|
|
|
connect:
|
|
if (tag_ops->connect) {
|
|
err = tag_ops->connect(ds);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (ds->ops->connect_tag_protocol) {
|
|
err = ds->ops->connect_tag_protocol(ds, tag_ops->proto);
|
|
if (err) {
|
|
dev_err(ds->dev,
|
|
"Unable to connect to tag protocol \"%s\": %pe\n",
|
|
tag_ops->name, ERR_PTR(err));
|
|
goto disconnect;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
disconnect:
|
|
if (tag_ops->disconnect)
|
|
tag_ops->disconnect(ds);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void dsa_switch_teardown_tag_protocol(struct dsa_switch *ds)
|
|
{
|
|
const struct dsa_device_ops *tag_ops = ds->dst->tag_ops;
|
|
|
|
if (tag_ops->disconnect)
|
|
tag_ops->disconnect(ds);
|
|
}
|
|
|
|
static int dsa_switch_setup(struct dsa_switch *ds)
|
|
{
|
|
int err;
|
|
|
|
if (ds->setup)
|
|
return 0;
|
|
|
|
/* Initialize ds->phys_mii_mask before registering the user MDIO bus
|
|
* driver and before ops->setup() has run, since the switch drivers and
|
|
* the user MDIO bus driver rely on these values for probing PHY
|
|
* devices or not
|
|
*/
|
|
ds->phys_mii_mask |= dsa_user_ports(ds);
|
|
|
|
err = dsa_switch_devlink_alloc(ds);
|
|
if (err)
|
|
return err;
|
|
|
|
err = dsa_switch_register_notifier(ds);
|
|
if (err)
|
|
goto devlink_free;
|
|
|
|
ds->configure_vlan_while_not_filtering = true;
|
|
|
|
err = ds->ops->setup(ds);
|
|
if (err < 0)
|
|
goto unregister_notifier;
|
|
|
|
err = dsa_switch_setup_tag_protocol(ds);
|
|
if (err)
|
|
goto teardown;
|
|
|
|
if (!ds->user_mii_bus && ds->ops->phy_read) {
|
|
ds->user_mii_bus = mdiobus_alloc();
|
|
if (!ds->user_mii_bus) {
|
|
err = -ENOMEM;
|
|
goto teardown;
|
|
}
|
|
|
|
dsa_user_mii_bus_init(ds);
|
|
|
|
err = mdiobus_register(ds->user_mii_bus);
|
|
if (err < 0)
|
|
goto free_user_mii_bus;
|
|
}
|
|
|
|
dsa_switch_devlink_register(ds);
|
|
|
|
ds->setup = true;
|
|
return 0;
|
|
|
|
free_user_mii_bus:
|
|
if (ds->user_mii_bus && ds->ops->phy_read)
|
|
mdiobus_free(ds->user_mii_bus);
|
|
teardown:
|
|
if (ds->ops->teardown)
|
|
ds->ops->teardown(ds);
|
|
unregister_notifier:
|
|
dsa_switch_unregister_notifier(ds);
|
|
devlink_free:
|
|
dsa_switch_devlink_free(ds);
|
|
return err;
|
|
}
|
|
|
|
static void dsa_switch_teardown(struct dsa_switch *ds)
|
|
{
|
|
if (!ds->setup)
|
|
return;
|
|
|
|
dsa_switch_devlink_unregister(ds);
|
|
|
|
if (ds->user_mii_bus && ds->ops->phy_read) {
|
|
mdiobus_unregister(ds->user_mii_bus);
|
|
mdiobus_free(ds->user_mii_bus);
|
|
ds->user_mii_bus = NULL;
|
|
}
|
|
|
|
dsa_switch_teardown_tag_protocol(ds);
|
|
|
|
if (ds->ops->teardown)
|
|
ds->ops->teardown(ds);
|
|
|
|
dsa_switch_unregister_notifier(ds);
|
|
|
|
dsa_switch_devlink_free(ds);
|
|
|
|
ds->setup = false;
|
|
}
|
|
|
|
/* First tear down the non-shared, then the shared ports. This ensures that
|
|
* all work items scheduled by our switchdev handlers for user ports have
|
|
* completed before we destroy the refcounting kept on the shared ports.
|
|
*/
|
|
static void dsa_tree_teardown_ports(struct dsa_switch_tree *dst)
|
|
{
|
|
struct dsa_port *dp;
|
|
|
|
list_for_each_entry(dp, &dst->ports, list)
|
|
if (dsa_port_is_user(dp) || dsa_port_is_unused(dp))
|
|
dsa_port_teardown(dp);
|
|
|
|
dsa_flush_workqueue();
|
|
|
|
list_for_each_entry(dp, &dst->ports, list)
|
|
if (dsa_port_is_dsa(dp) || dsa_port_is_cpu(dp))
|
|
dsa_port_teardown(dp);
|
|
}
|
|
|
|
static void dsa_tree_teardown_switches(struct dsa_switch_tree *dst)
|
|
{
|
|
struct dsa_port *dp;
|
|
|
|
list_for_each_entry(dp, &dst->ports, list)
|
|
dsa_switch_teardown(dp->ds);
|
|
}
|
|
|
|
/* Bring shared ports up first, then non-shared ports */
|
|
static int dsa_tree_setup_ports(struct dsa_switch_tree *dst)
|
|
{
|
|
struct dsa_port *dp;
|
|
int err = 0;
|
|
|
|
list_for_each_entry(dp, &dst->ports, list) {
|
|
if (dsa_port_is_dsa(dp) || dsa_port_is_cpu(dp)) {
|
|
err = dsa_port_setup(dp);
|
|
if (err)
|
|
goto teardown;
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(dp, &dst->ports, list) {
|
|
if (dsa_port_is_user(dp) || dsa_port_is_unused(dp)) {
|
|
err = dsa_port_setup(dp);
|
|
if (err) {
|
|
err = dsa_port_setup_as_unused(dp);
|
|
if (err)
|
|
goto teardown;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
teardown:
|
|
dsa_tree_teardown_ports(dst);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int dsa_tree_setup_switches(struct dsa_switch_tree *dst)
|
|
{
|
|
struct dsa_port *dp;
|
|
int err = 0;
|
|
|
|
list_for_each_entry(dp, &dst->ports, list) {
|
|
err = dsa_switch_setup(dp->ds);
|
|
if (err) {
|
|
dsa_tree_teardown_switches(dst);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int dsa_tree_setup_conduit(struct dsa_switch_tree *dst)
|
|
{
|
|
struct dsa_port *cpu_dp;
|
|
int err = 0;
|
|
|
|
rtnl_lock();
|
|
|
|
dsa_tree_for_each_cpu_port(cpu_dp, dst) {
|
|
struct net_device *conduit = cpu_dp->conduit;
|
|
bool admin_up = (conduit->flags & IFF_UP) &&
|
|
!qdisc_tx_is_noop(conduit);
|
|
|
|
err = dsa_conduit_setup(conduit, cpu_dp);
|
|
if (err)
|
|
break;
|
|
|
|
/* Replay conduit state event */
|
|
dsa_tree_conduit_admin_state_change(dst, conduit, admin_up);
|
|
dsa_tree_conduit_oper_state_change(dst, conduit,
|
|
netif_oper_up(conduit));
|
|
}
|
|
|
|
rtnl_unlock();
|
|
|
|
return err;
|
|
}
|
|
|
|
static void dsa_tree_teardown_conduit(struct dsa_switch_tree *dst)
|
|
{
|
|
struct dsa_port *cpu_dp;
|
|
|
|
rtnl_lock();
|
|
|
|
dsa_tree_for_each_cpu_port(cpu_dp, dst) {
|
|
struct net_device *conduit = cpu_dp->conduit;
|
|
|
|
/* Synthesizing an "admin down" state is sufficient for
|
|
* the switches to get a notification if the conduit is
|
|
* currently up and running.
|
|
*/
|
|
dsa_tree_conduit_admin_state_change(dst, conduit, false);
|
|
|
|
dsa_conduit_teardown(conduit);
|
|
}
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
static int dsa_tree_setup_lags(struct dsa_switch_tree *dst)
|
|
{
|
|
unsigned int len = 0;
|
|
struct dsa_port *dp;
|
|
|
|
list_for_each_entry(dp, &dst->ports, list) {
|
|
if (dp->ds->num_lag_ids > len)
|
|
len = dp->ds->num_lag_ids;
|
|
}
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
dst->lags = kcalloc(len, sizeof(*dst->lags), GFP_KERNEL);
|
|
if (!dst->lags)
|
|
return -ENOMEM;
|
|
|
|
dst->lags_len = len;
|
|
return 0;
|
|
}
|
|
|
|
static void dsa_tree_teardown_lags(struct dsa_switch_tree *dst)
|
|
{
|
|
kfree(dst->lags);
|
|
}
|
|
|
|
static int dsa_tree_setup(struct dsa_switch_tree *dst)
|
|
{
|
|
bool complete;
|
|
int err;
|
|
|
|
if (dst->setup) {
|
|
pr_err("DSA: tree %d already setup! Disjoint trees?\n",
|
|
dst->index);
|
|
return -EEXIST;
|
|
}
|
|
|
|
complete = dsa_tree_setup_routing_table(dst);
|
|
if (!complete)
|
|
return 0;
|
|
|
|
err = dsa_tree_setup_cpu_ports(dst);
|
|
if (err)
|
|
return err;
|
|
|
|
err = dsa_tree_setup_switches(dst);
|
|
if (err)
|
|
goto teardown_cpu_ports;
|
|
|
|
err = dsa_tree_setup_ports(dst);
|
|
if (err)
|
|
goto teardown_switches;
|
|
|
|
err = dsa_tree_setup_conduit(dst);
|
|
if (err)
|
|
goto teardown_ports;
|
|
|
|
err = dsa_tree_setup_lags(dst);
|
|
if (err)
|
|
goto teardown_conduit;
|
|
|
|
dst->setup = true;
|
|
|
|
pr_info("DSA: tree %d setup\n", dst->index);
|
|
|
|
return 0;
|
|
|
|
teardown_conduit:
|
|
dsa_tree_teardown_conduit(dst);
|
|
teardown_ports:
|
|
dsa_tree_teardown_ports(dst);
|
|
teardown_switches:
|
|
dsa_tree_teardown_switches(dst);
|
|
teardown_cpu_ports:
|
|
dsa_tree_teardown_cpu_ports(dst);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void dsa_tree_teardown(struct dsa_switch_tree *dst)
|
|
{
|
|
struct dsa_link *dl, *next;
|
|
|
|
if (!dst->setup)
|
|
return;
|
|
|
|
dsa_tree_teardown_lags(dst);
|
|
|
|
dsa_tree_teardown_conduit(dst);
|
|
|
|
dsa_tree_teardown_ports(dst);
|
|
|
|
dsa_tree_teardown_switches(dst);
|
|
|
|
dsa_tree_teardown_cpu_ports(dst);
|
|
|
|
list_for_each_entry_safe(dl, next, &dst->rtable, list) {
|
|
list_del(&dl->list);
|
|
kfree(dl);
|
|
}
|
|
|
|
pr_info("DSA: tree %d torn down\n", dst->index);
|
|
|
|
dst->setup = false;
|
|
}
|
|
|
|
static int dsa_tree_bind_tag_proto(struct dsa_switch_tree *dst,
|
|
const struct dsa_device_ops *tag_ops)
|
|
{
|
|
const struct dsa_device_ops *old_tag_ops = dst->tag_ops;
|
|
struct dsa_notifier_tag_proto_info info;
|
|
int err;
|
|
|
|
dst->tag_ops = tag_ops;
|
|
|
|
/* Notify the switches from this tree about the connection
|
|
* to the new tagger
|
|
*/
|
|
info.tag_ops = tag_ops;
|
|
err = dsa_tree_notify(dst, DSA_NOTIFIER_TAG_PROTO_CONNECT, &info);
|
|
if (err && err != -EOPNOTSUPP)
|
|
goto out_disconnect;
|
|
|
|
/* Notify the old tagger about the disconnection from this tree */
|
|
info.tag_ops = old_tag_ops;
|
|
dsa_tree_notify(dst, DSA_NOTIFIER_TAG_PROTO_DISCONNECT, &info);
|
|
|
|
return 0;
|
|
|
|
out_disconnect:
|
|
info.tag_ops = tag_ops;
|
|
dsa_tree_notify(dst, DSA_NOTIFIER_TAG_PROTO_DISCONNECT, &info);
|
|
dst->tag_ops = old_tag_ops;
|
|
|
|
return err;
|
|
}
|
|
|
|
/* Since the dsa/tagging sysfs device attribute is per conduit, the assumption
|
|
* is that all DSA switches within a tree share the same tagger, otherwise
|
|
* they would have formed disjoint trees (different "dsa,member" values).
|
|
*/
|
|
int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst,
|
|
const struct dsa_device_ops *tag_ops,
|
|
const struct dsa_device_ops *old_tag_ops)
|
|
{
|
|
struct dsa_notifier_tag_proto_info info;
|
|
struct dsa_port *dp;
|
|
int err = -EBUSY;
|
|
|
|
if (!rtnl_trylock())
|
|
return restart_syscall();
|
|
|
|
/* At the moment we don't allow changing the tag protocol under
|
|
* traffic. The rtnl_mutex also happens to serialize concurrent
|
|
* attempts to change the tagging protocol. If we ever lift the IFF_UP
|
|
* restriction, there needs to be another mutex which serializes this.
|
|
*/
|
|
dsa_tree_for_each_user_port(dp, dst) {
|
|
if (dsa_port_to_conduit(dp)->flags & IFF_UP)
|
|
goto out_unlock;
|
|
|
|
if (dp->user->flags & IFF_UP)
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* Notify the tag protocol change */
|
|
info.tag_ops = tag_ops;
|
|
err = dsa_tree_notify(dst, DSA_NOTIFIER_TAG_PROTO, &info);
|
|
if (err)
|
|
goto out_unwind_tagger;
|
|
|
|
err = dsa_tree_bind_tag_proto(dst, tag_ops);
|
|
if (err)
|
|
goto out_unwind_tagger;
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
|
|
out_unwind_tagger:
|
|
info.tag_ops = old_tag_ops;
|
|
dsa_tree_notify(dst, DSA_NOTIFIER_TAG_PROTO, &info);
|
|
out_unlock:
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
|
|
static void dsa_tree_conduit_state_change(struct dsa_switch_tree *dst,
|
|
struct net_device *conduit)
|
|
{
|
|
struct dsa_notifier_conduit_state_info info;
|
|
struct dsa_port *cpu_dp = conduit->dsa_ptr;
|
|
|
|
info.conduit = conduit;
|
|
info.operational = dsa_port_conduit_is_operational(cpu_dp);
|
|
|
|
dsa_tree_notify(dst, DSA_NOTIFIER_CONDUIT_STATE_CHANGE, &info);
|
|
}
|
|
|
|
void dsa_tree_conduit_admin_state_change(struct dsa_switch_tree *dst,
|
|
struct net_device *conduit,
|
|
bool up)
|
|
{
|
|
struct dsa_port *cpu_dp = conduit->dsa_ptr;
|
|
bool notify = false;
|
|
|
|
/* Don't keep track of admin state on LAG DSA conduits,
|
|
* but rather just of physical DSA conduits
|
|
*/
|
|
if (netif_is_lag_master(conduit))
|
|
return;
|
|
|
|
if ((dsa_port_conduit_is_operational(cpu_dp)) !=
|
|
(up && cpu_dp->conduit_oper_up))
|
|
notify = true;
|
|
|
|
cpu_dp->conduit_admin_up = up;
|
|
|
|
if (notify)
|
|
dsa_tree_conduit_state_change(dst, conduit);
|
|
}
|
|
|
|
void dsa_tree_conduit_oper_state_change(struct dsa_switch_tree *dst,
|
|
struct net_device *conduit,
|
|
bool up)
|
|
{
|
|
struct dsa_port *cpu_dp = conduit->dsa_ptr;
|
|
bool notify = false;
|
|
|
|
/* Don't keep track of oper state on LAG DSA conduits,
|
|
* but rather just of physical DSA conduits
|
|
*/
|
|
if (netif_is_lag_master(conduit))
|
|
return;
|
|
|
|
if ((dsa_port_conduit_is_operational(cpu_dp)) !=
|
|
(cpu_dp->conduit_admin_up && up))
|
|
notify = true;
|
|
|
|
cpu_dp->conduit_oper_up = up;
|
|
|
|
if (notify)
|
|
dsa_tree_conduit_state_change(dst, conduit);
|
|
}
|
|
|
|
static struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index)
|
|
{
|
|
struct dsa_switch_tree *dst = ds->dst;
|
|
struct dsa_port *dp;
|
|
|
|
dsa_switch_for_each_port(dp, ds)
|
|
if (dp->index == index)
|
|
return dp;
|
|
|
|
dp = kzalloc(sizeof(*dp), GFP_KERNEL);
|
|
if (!dp)
|
|
return NULL;
|
|
|
|
dp->ds = ds;
|
|
dp->index = index;
|
|
|
|
mutex_init(&dp->addr_lists_lock);
|
|
mutex_init(&dp->vlans_lock);
|
|
INIT_LIST_HEAD(&dp->fdbs);
|
|
INIT_LIST_HEAD(&dp->mdbs);
|
|
INIT_LIST_HEAD(&dp->vlans); /* also initializes &dp->user_vlans */
|
|
INIT_LIST_HEAD(&dp->list);
|
|
list_add_tail(&dp->list, &dst->ports);
|
|
|
|
return dp;
|
|
}
|
|
|
|
static int dsa_port_parse_user(struct dsa_port *dp, const char *name)
|
|
{
|
|
dp->type = DSA_PORT_TYPE_USER;
|
|
dp->name = name;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_port_parse_dsa(struct dsa_port *dp)
|
|
{
|
|
dp->type = DSA_PORT_TYPE_DSA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum dsa_tag_protocol dsa_get_tag_protocol(struct dsa_port *dp,
|
|
struct net_device *conduit)
|
|
{
|
|
enum dsa_tag_protocol tag_protocol = DSA_TAG_PROTO_NONE;
|
|
struct dsa_switch *mds, *ds = dp->ds;
|
|
unsigned int mdp_upstream;
|
|
struct dsa_port *mdp;
|
|
|
|
/* It is possible to stack DSA switches onto one another when that
|
|
* happens the switch driver may want to know if its tagging protocol
|
|
* is going to work in such a configuration.
|
|
*/
|
|
if (dsa_user_dev_check(conduit)) {
|
|
mdp = dsa_user_to_port(conduit);
|
|
mds = mdp->ds;
|
|
mdp_upstream = dsa_upstream_port(mds, mdp->index);
|
|
tag_protocol = mds->ops->get_tag_protocol(mds, mdp_upstream,
|
|
DSA_TAG_PROTO_NONE);
|
|
}
|
|
|
|
/* If the conduit device is not itself a DSA user in a disjoint DSA
|
|
* tree, then return immediately.
|
|
*/
|
|
return ds->ops->get_tag_protocol(ds, dp->index, tag_protocol);
|
|
}
|
|
|
|
static int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *conduit,
|
|
const char *user_protocol)
|
|
{
|
|
const struct dsa_device_ops *tag_ops = NULL;
|
|
struct dsa_switch *ds = dp->ds;
|
|
struct dsa_switch_tree *dst = ds->dst;
|
|
enum dsa_tag_protocol default_proto;
|
|
|
|
/* Find out which protocol the switch would prefer. */
|
|
default_proto = dsa_get_tag_protocol(dp, conduit);
|
|
if (dst->default_proto) {
|
|
if (dst->default_proto != default_proto) {
|
|
dev_err(ds->dev,
|
|
"A DSA switch tree can have only one tagging protocol\n");
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
dst->default_proto = default_proto;
|
|
}
|
|
|
|
/* See if the user wants to override that preference. */
|
|
if (user_protocol) {
|
|
if (!ds->ops->change_tag_protocol) {
|
|
dev_err(ds->dev, "Tag protocol cannot be modified\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
tag_ops = dsa_tag_driver_get_by_name(user_protocol);
|
|
if (IS_ERR(tag_ops)) {
|
|
dev_warn(ds->dev,
|
|
"Failed to find a tagging driver for protocol %s, using default\n",
|
|
user_protocol);
|
|
tag_ops = NULL;
|
|
}
|
|
}
|
|
|
|
if (!tag_ops)
|
|
tag_ops = dsa_tag_driver_get_by_id(default_proto);
|
|
|
|
if (IS_ERR(tag_ops)) {
|
|
if (PTR_ERR(tag_ops) == -ENOPROTOOPT)
|
|
return -EPROBE_DEFER;
|
|
|
|
dev_warn(ds->dev, "No tagger for this switch\n");
|
|
return PTR_ERR(tag_ops);
|
|
}
|
|
|
|
if (dst->tag_ops) {
|
|
if (dst->tag_ops != tag_ops) {
|
|
dev_err(ds->dev,
|
|
"A DSA switch tree can have only one tagging protocol\n");
|
|
|
|
dsa_tag_driver_put(tag_ops);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* In the case of multiple CPU ports per switch, the tagging
|
|
* protocol is still reference-counted only per switch tree.
|
|
*/
|
|
dsa_tag_driver_put(tag_ops);
|
|
} else {
|
|
dst->tag_ops = tag_ops;
|
|
}
|
|
|
|
dp->conduit = conduit;
|
|
dp->type = DSA_PORT_TYPE_CPU;
|
|
dsa_port_set_tag_protocol(dp, dst->tag_ops);
|
|
dp->dst = dst;
|
|
|
|
/* At this point, the tree may be configured to use a different
|
|
* tagger than the one chosen by the switch driver during
|
|
* .setup, in the case when a user selects a custom protocol
|
|
* through the DT.
|
|
*
|
|
* This is resolved by syncing the driver with the tree in
|
|
* dsa_switch_setup_tag_protocol once .setup has run and the
|
|
* driver is ready to accept calls to .change_tag_protocol. If
|
|
* the driver does not support the custom protocol at that
|
|
* point, the tree is wholly rejected, thereby ensuring that the
|
|
* tree and driver are always in agreement on the protocol to
|
|
* use.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_port_parse_of(struct dsa_port *dp, struct device_node *dn)
|
|
{
|
|
struct device_node *ethernet = of_parse_phandle(dn, "ethernet", 0);
|
|
const char *name = of_get_property(dn, "label", NULL);
|
|
bool link = of_property_read_bool(dn, "link");
|
|
|
|
dp->dn = dn;
|
|
|
|
if (ethernet) {
|
|
struct net_device *conduit;
|
|
const char *user_protocol;
|
|
|
|
conduit = of_find_net_device_by_node(ethernet);
|
|
of_node_put(ethernet);
|
|
if (!conduit)
|
|
return -EPROBE_DEFER;
|
|
|
|
user_protocol = of_get_property(dn, "dsa-tag-protocol", NULL);
|
|
return dsa_port_parse_cpu(dp, conduit, user_protocol);
|
|
}
|
|
|
|
if (link)
|
|
return dsa_port_parse_dsa(dp);
|
|
|
|
return dsa_port_parse_user(dp, name);
|
|
}
|
|
|
|
static int dsa_switch_parse_ports_of(struct dsa_switch *ds,
|
|
struct device_node *dn)
|
|
{
|
|
struct device_node *ports, *port;
|
|
struct dsa_port *dp;
|
|
int err = 0;
|
|
u32 reg;
|
|
|
|
ports = of_get_child_by_name(dn, "ports");
|
|
if (!ports) {
|
|
/* The second possibility is "ethernet-ports" */
|
|
ports = of_get_child_by_name(dn, "ethernet-ports");
|
|
if (!ports) {
|
|
dev_err(ds->dev, "no ports child node found\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
for_each_available_child_of_node(ports, port) {
|
|
err = of_property_read_u32(port, "reg", ®);
|
|
if (err) {
|
|
of_node_put(port);
|
|
goto out_put_node;
|
|
}
|
|
|
|
if (reg >= ds->num_ports) {
|
|
dev_err(ds->dev, "port %pOF index %u exceeds num_ports (%u)\n",
|
|
port, reg, ds->num_ports);
|
|
of_node_put(port);
|
|
err = -EINVAL;
|
|
goto out_put_node;
|
|
}
|
|
|
|
dp = dsa_to_port(ds, reg);
|
|
|
|
err = dsa_port_parse_of(dp, port);
|
|
if (err) {
|
|
of_node_put(port);
|
|
goto out_put_node;
|
|
}
|
|
}
|
|
|
|
out_put_node:
|
|
of_node_put(ports);
|
|
return err;
|
|
}
|
|
|
|
static int dsa_switch_parse_member_of(struct dsa_switch *ds,
|
|
struct device_node *dn)
|
|
{
|
|
u32 m[2] = { 0, 0 };
|
|
int sz;
|
|
|
|
/* Don't error out if this optional property isn't found */
|
|
sz = of_property_read_variable_u32_array(dn, "dsa,member", m, 2, 2);
|
|
if (sz < 0 && sz != -EINVAL)
|
|
return sz;
|
|
|
|
ds->index = m[1];
|
|
|
|
ds->dst = dsa_tree_touch(m[0]);
|
|
if (!ds->dst)
|
|
return -ENOMEM;
|
|
|
|
if (dsa_switch_find(ds->dst->index, ds->index)) {
|
|
dev_err(ds->dev,
|
|
"A DSA switch with index %d already exists in tree %d\n",
|
|
ds->index, ds->dst->index);
|
|
return -EEXIST;
|
|
}
|
|
|
|
if (ds->dst->last_switch < ds->index)
|
|
ds->dst->last_switch = ds->index;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_touch_ports(struct dsa_switch *ds)
|
|
{
|
|
struct dsa_port *dp;
|
|
int port;
|
|
|
|
for (port = 0; port < ds->num_ports; port++) {
|
|
dp = dsa_port_touch(ds, port);
|
|
if (!dp)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_parse_of(struct dsa_switch *ds, struct device_node *dn)
|
|
{
|
|
int err;
|
|
|
|
err = dsa_switch_parse_member_of(ds, dn);
|
|
if (err)
|
|
return err;
|
|
|
|
err = dsa_switch_touch_ports(ds);
|
|
if (err)
|
|
return err;
|
|
|
|
return dsa_switch_parse_ports_of(ds, dn);
|
|
}
|
|
|
|
static int dev_is_class(struct device *dev, void *class)
|
|
{
|
|
if (dev->class != NULL && !strcmp(dev->class->name, class))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct device *dev_find_class(struct device *parent, char *class)
|
|
{
|
|
if (dev_is_class(parent, class)) {
|
|
get_device(parent);
|
|
return parent;
|
|
}
|
|
|
|
return device_find_child(parent, class, dev_is_class);
|
|
}
|
|
|
|
static struct net_device *dsa_dev_to_net_device(struct device *dev)
|
|
{
|
|
struct device *d;
|
|
|
|
d = dev_find_class(dev, "net");
|
|
if (d != NULL) {
|
|
struct net_device *nd;
|
|
|
|
nd = to_net_dev(d);
|
|
dev_hold(nd);
|
|
put_device(d);
|
|
|
|
return nd;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int dsa_port_parse(struct dsa_port *dp, const char *name,
|
|
struct device *dev)
|
|
{
|
|
if (!strcmp(name, "cpu")) {
|
|
struct net_device *conduit;
|
|
|
|
conduit = dsa_dev_to_net_device(dev);
|
|
if (!conduit)
|
|
return -EPROBE_DEFER;
|
|
|
|
dev_put(conduit);
|
|
|
|
return dsa_port_parse_cpu(dp, conduit, NULL);
|
|
}
|
|
|
|
if (!strcmp(name, "dsa"))
|
|
return dsa_port_parse_dsa(dp);
|
|
|
|
return dsa_port_parse_user(dp, name);
|
|
}
|
|
|
|
static int dsa_switch_parse_ports(struct dsa_switch *ds,
|
|
struct dsa_chip_data *cd)
|
|
{
|
|
bool valid_name_found = false;
|
|
struct dsa_port *dp;
|
|
struct device *dev;
|
|
const char *name;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
for (i = 0; i < DSA_MAX_PORTS; i++) {
|
|
name = cd->port_names[i];
|
|
dev = cd->netdev[i];
|
|
dp = dsa_to_port(ds, i);
|
|
|
|
if (!name)
|
|
continue;
|
|
|
|
err = dsa_port_parse(dp, name, dev);
|
|
if (err)
|
|
return err;
|
|
|
|
valid_name_found = true;
|
|
}
|
|
|
|
if (!valid_name_found && i == DSA_MAX_PORTS)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_switch_parse(struct dsa_switch *ds, struct dsa_chip_data *cd)
|
|
{
|
|
int err;
|
|
|
|
ds->cd = cd;
|
|
|
|
/* We don't support interconnected switches nor multiple trees via
|
|
* platform data, so this is the unique switch of the tree.
|
|
*/
|
|
ds->index = 0;
|
|
ds->dst = dsa_tree_touch(0);
|
|
if (!ds->dst)
|
|
return -ENOMEM;
|
|
|
|
err = dsa_switch_touch_ports(ds);
|
|
if (err)
|
|
return err;
|
|
|
|
return dsa_switch_parse_ports(ds, cd);
|
|
}
|
|
|
|
static void dsa_switch_release_ports(struct dsa_switch *ds)
|
|
{
|
|
struct dsa_port *dp, *next;
|
|
|
|
dsa_switch_for_each_port_safe(dp, next, ds) {
|
|
WARN_ON(!list_empty(&dp->fdbs));
|
|
WARN_ON(!list_empty(&dp->mdbs));
|
|
WARN_ON(!list_empty(&dp->vlans));
|
|
list_del(&dp->list);
|
|
kfree(dp);
|
|
}
|
|
}
|
|
|
|
static int dsa_switch_probe(struct dsa_switch *ds)
|
|
{
|
|
struct dsa_switch_tree *dst;
|
|
struct dsa_chip_data *pdata;
|
|
struct device_node *np;
|
|
int err;
|
|
|
|
if (!ds->dev)
|
|
return -ENODEV;
|
|
|
|
pdata = ds->dev->platform_data;
|
|
np = ds->dev->of_node;
|
|
|
|
if (!ds->num_ports)
|
|
return -EINVAL;
|
|
|
|
if (np) {
|
|
err = dsa_switch_parse_of(ds, np);
|
|
if (err)
|
|
dsa_switch_release_ports(ds);
|
|
} else if (pdata) {
|
|
err = dsa_switch_parse(ds, pdata);
|
|
if (err)
|
|
dsa_switch_release_ports(ds);
|
|
} else {
|
|
err = -ENODEV;
|
|
}
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
dst = ds->dst;
|
|
dsa_tree_get(dst);
|
|
err = dsa_tree_setup(dst);
|
|
if (err) {
|
|
dsa_switch_release_ports(ds);
|
|
dsa_tree_put(dst);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int dsa_register_switch(struct dsa_switch *ds)
|
|
{
|
|
int err;
|
|
|
|
mutex_lock(&dsa2_mutex);
|
|
err = dsa_switch_probe(ds);
|
|
dsa_tree_put(ds->dst);
|
|
mutex_unlock(&dsa2_mutex);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_register_switch);
|
|
|
|
static void dsa_switch_remove(struct dsa_switch *ds)
|
|
{
|
|
struct dsa_switch_tree *dst = ds->dst;
|
|
|
|
dsa_tree_teardown(dst);
|
|
dsa_switch_release_ports(ds);
|
|
dsa_tree_put(dst);
|
|
}
|
|
|
|
void dsa_unregister_switch(struct dsa_switch *ds)
|
|
{
|
|
mutex_lock(&dsa2_mutex);
|
|
dsa_switch_remove(ds);
|
|
mutex_unlock(&dsa2_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_unregister_switch);
|
|
|
|
/* If the DSA conduit chooses to unregister its net_device on .shutdown, DSA is
|
|
* blocking that operation from completion, due to the dev_hold taken inside
|
|
* netdev_upper_dev_link. Unlink the DSA user interfaces from being uppers of
|
|
* the DSA conduit, so that the system can reboot successfully.
|
|
*/
|
|
void dsa_switch_shutdown(struct dsa_switch *ds)
|
|
{
|
|
struct net_device *conduit, *user_dev;
|
|
struct dsa_port *dp;
|
|
|
|
mutex_lock(&dsa2_mutex);
|
|
|
|
if (!ds->setup)
|
|
goto out;
|
|
|
|
rtnl_lock();
|
|
|
|
dsa_switch_for_each_user_port(dp, ds) {
|
|
conduit = dsa_port_to_conduit(dp);
|
|
user_dev = dp->user;
|
|
|
|
netdev_upper_dev_unlink(conduit, user_dev);
|
|
}
|
|
|
|
/* Disconnect from further netdevice notifiers on the conduit,
|
|
* since netdev_uses_dsa() will now return false.
|
|
*/
|
|
dsa_switch_for_each_cpu_port(dp, ds)
|
|
dp->conduit->dsa_ptr = NULL;
|
|
|
|
rtnl_unlock();
|
|
out:
|
|
mutex_unlock(&dsa2_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_switch_shutdown);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static bool dsa_port_is_initialized(const struct dsa_port *dp)
|
|
{
|
|
return dp->type == DSA_PORT_TYPE_USER && dp->user;
|
|
}
|
|
|
|
int dsa_switch_suspend(struct dsa_switch *ds)
|
|
{
|
|
struct dsa_port *dp;
|
|
int ret = 0;
|
|
|
|
/* Suspend user network devices */
|
|
dsa_switch_for_each_port(dp, ds) {
|
|
if (!dsa_port_is_initialized(dp))
|
|
continue;
|
|
|
|
ret = dsa_user_suspend(dp->user);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (ds->ops->suspend)
|
|
ret = ds->ops->suspend(ds);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_switch_suspend);
|
|
|
|
int dsa_switch_resume(struct dsa_switch *ds)
|
|
{
|
|
struct dsa_port *dp;
|
|
int ret = 0;
|
|
|
|
if (ds->ops->resume)
|
|
ret = ds->ops->resume(ds);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Resume user network devices */
|
|
dsa_switch_for_each_port(dp, ds) {
|
|
if (!dsa_port_is_initialized(dp))
|
|
continue;
|
|
|
|
ret = dsa_user_resume(dp->user);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_switch_resume);
|
|
#endif
|
|
|
|
struct dsa_port *dsa_port_from_netdev(struct net_device *netdev)
|
|
{
|
|
if (!netdev || !dsa_user_dev_check(netdev))
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
return dsa_user_to_port(netdev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_port_from_netdev);
|
|
|
|
bool dsa_db_equal(const struct dsa_db *a, const struct dsa_db *b)
|
|
{
|
|
if (a->type != b->type)
|
|
return false;
|
|
|
|
switch (a->type) {
|
|
case DSA_DB_PORT:
|
|
return a->dp == b->dp;
|
|
case DSA_DB_LAG:
|
|
return a->lag.dev == b->lag.dev;
|
|
case DSA_DB_BRIDGE:
|
|
return a->bridge.num == b->bridge.num;
|
|
default:
|
|
WARN_ON(1);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port,
|
|
const unsigned char *addr, u16 vid,
|
|
struct dsa_db db)
|
|
{
|
|
struct dsa_port *dp = dsa_to_port(ds, port);
|
|
struct dsa_mac_addr *a;
|
|
|
|
lockdep_assert_held(&dp->addr_lists_lock);
|
|
|
|
list_for_each_entry(a, &dp->fdbs, list) {
|
|
if (!ether_addr_equal(a->addr, addr) || a->vid != vid)
|
|
continue;
|
|
|
|
if (a->db.type == db.type && !dsa_db_equal(&a->db, &db))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_fdb_present_in_other_db);
|
|
|
|
bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port,
|
|
const struct switchdev_obj_port_mdb *mdb,
|
|
struct dsa_db db)
|
|
{
|
|
struct dsa_port *dp = dsa_to_port(ds, port);
|
|
struct dsa_mac_addr *a;
|
|
|
|
lockdep_assert_held(&dp->addr_lists_lock);
|
|
|
|
list_for_each_entry(a, &dp->mdbs, list) {
|
|
if (!ether_addr_equal(a->addr, mdb->addr) || a->vid != mdb->vid)
|
|
continue;
|
|
|
|
if (a->db.type == db.type && !dsa_db_equal(&a->db, &db))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_mdb_present_in_other_db);
|
|
|
|
static const struct dsa_stubs __dsa_stubs = {
|
|
.conduit_hwtstamp_validate = __dsa_conduit_hwtstamp_validate,
|
|
};
|
|
|
|
static void dsa_register_stubs(void)
|
|
{
|
|
dsa_stubs = &__dsa_stubs;
|
|
}
|
|
|
|
static void dsa_unregister_stubs(void)
|
|
{
|
|
dsa_stubs = NULL;
|
|
}
|
|
|
|
static int __init dsa_init_module(void)
|
|
{
|
|
int rc;
|
|
|
|
dsa_owq = alloc_ordered_workqueue("dsa_ordered",
|
|
WQ_MEM_RECLAIM);
|
|
if (!dsa_owq)
|
|
return -ENOMEM;
|
|
|
|
rc = dsa_user_register_notifier();
|
|
if (rc)
|
|
goto register_notifier_fail;
|
|
|
|
dev_add_pack(&dsa_pack_type);
|
|
|
|
rc = rtnl_link_register(&dsa_link_ops);
|
|
if (rc)
|
|
goto netlink_register_fail;
|
|
|
|
dsa_register_stubs();
|
|
|
|
return 0;
|
|
|
|
netlink_register_fail:
|
|
dsa_user_unregister_notifier();
|
|
dev_remove_pack(&dsa_pack_type);
|
|
register_notifier_fail:
|
|
destroy_workqueue(dsa_owq);
|
|
|
|
return rc;
|
|
}
|
|
module_init(dsa_init_module);
|
|
|
|
static void __exit dsa_cleanup_module(void)
|
|
{
|
|
dsa_unregister_stubs();
|
|
|
|
rtnl_link_unregister(&dsa_link_ops);
|
|
|
|
dsa_user_unregister_notifier();
|
|
dev_remove_pack(&dsa_pack_type);
|
|
destroy_workqueue(dsa_owq);
|
|
}
|
|
module_exit(dsa_cleanup_module);
|
|
|
|
MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
|
|
MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:dsa");
|