obj-$(CONFIG_NET_DSA) += dsa_core.o
dsa_core-y += \
devlink.o \
- dsa2.o \
+ dsa.o \
master.o \
netlink.o \
port.o \
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DSA topology and switch handling
+ *
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
+ * Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch>
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/rtnetlink.h>
+#include <linux/of.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <net/sch_generic.h>
+
+#include "devlink.h"
+#include "dsa.h"
+#include "dsa_priv.h"
+#include "master.h"
+#include "port.h"
+#include "slave.h"
+#include "switch.h"
+#include "tag.h"
+
+static DEFINE_MUTEX(dsa2_mutex);
+LIST_HEAD(dsa_tree_list);
+
+static struct workqueue_struct *dsa_owq;
+
+/* Track the bridges with forwarding offload enabled */
+static unsigned long dsa_fwd_offloading_bridges;
+
+bool dsa_schedule_work(struct work_struct *work)
+{
+ return queue_work(dsa_owq, work);
+}
+
+void dsa_flush_workqueue(void)
+{
+ flush_workqueue(dsa_owq);
+}
+EXPORT_SYMBOL_GPL(dsa_flush_workqueue);
+
+/**
+ * dsa_lag_map() - Map LAG structure to a linear LAG array
+ * @dst: Tree in which to record the mapping.
+ * @lag: LAG structure that is to be mapped to the tree's array.
+ *
+ * dsa_lag_id/dsa_lag_by_id can then be used to translate between the
+ * two spaces. The size of the mapping space is determined by the
+ * driver by setting ds->num_lag_ids. It is perfectly legal to leave
+ * it unset if it is not needed, in which case these functions become
+ * no-ops.
+ */
+void dsa_lag_map(struct dsa_switch_tree *dst, struct dsa_lag *lag)
+{
+ unsigned int id;
+
+ for (id = 1; id <= dst->lags_len; id++) {
+ if (!dsa_lag_by_id(dst, id)) {
+ dst->lags[id - 1] = lag;
+ lag->id = id;
+ return;
+ }
+ }
+
+ /* No IDs left, which is OK. Some drivers do not need it. The
+ * ones that do, e.g. mv88e6xxx, will discover that dsa_lag_id
+ * returns an error for this device when joining the LAG. The
+ * driver can then return -EOPNOTSUPP back to DSA, which will
+ * fall back to a software LAG.
+ */
+}
+
+/**
+ * dsa_lag_unmap() - Remove a LAG ID mapping
+ * @dst: Tree in which the mapping is recorded.
+ * @lag: LAG structure that was mapped.
+ *
+ * As there may be multiple users of the mapping, it is only removed
+ * if there are no other references to it.
+ */
+void dsa_lag_unmap(struct dsa_switch_tree *dst, struct dsa_lag *lag)
+{
+ unsigned int id;
+
+ dsa_lags_foreach_id(id, dst) {
+ if (dsa_lag_by_id(dst, id) == lag) {
+ dst->lags[id - 1] = NULL;
+ lag->id = 0;
+ break;
+ }
+ }
+}
+
+struct dsa_lag *dsa_tree_lag_find(struct dsa_switch_tree *dst,
+ const struct net_device *lag_dev)
+{
+ struct dsa_port *dp;
+
+ list_for_each_entry(dp, &dst->ports, list)
+ if (dsa_port_lag_dev_get(dp) == lag_dev)
+ return dp->lag;
+
+ return NULL;
+}
+
+struct dsa_bridge *dsa_tree_bridge_find(struct dsa_switch_tree *dst,
+ const struct net_device *br)
+{
+ struct dsa_port *dp;
+
+ list_for_each_entry(dp, &dst->ports, list)
+ if (dsa_port_bridge_dev_get(dp) == br)
+ return dp->bridge;
+
+ return NULL;
+}
+
+static int dsa_bridge_num_find(const struct net_device *bridge_dev)
+{
+ struct dsa_switch_tree *dst;
+
+ list_for_each_entry(dst, &dsa_tree_list, list) {
+ struct dsa_bridge *bridge;
+
+ bridge = dsa_tree_bridge_find(dst, bridge_dev);
+ if (bridge)
+ return bridge->num;
+ }
+
+ return 0;
+}
+
+unsigned int dsa_bridge_num_get(const struct net_device *bridge_dev, int max)
+{
+ unsigned int bridge_num = dsa_bridge_num_find(bridge_dev);
+
+ /* Switches without FDB isolation support don't get unique
+ * bridge numbering
+ */
+ if (!max)
+ return 0;
+
+ if (!bridge_num) {
+ /* First port that requests FDB isolation or TX forwarding
+ * offload for this bridge
+ */
+ bridge_num = find_next_zero_bit(&dsa_fwd_offloading_bridges,
+ DSA_MAX_NUM_OFFLOADING_BRIDGES,
+ 1);
+ if (bridge_num >= max)
+ return 0;
+
+ set_bit(bridge_num, &dsa_fwd_offloading_bridges);
+ }
+
+ return bridge_num;
+}
+
+void dsa_bridge_num_put(const struct net_device *bridge_dev,
+ unsigned int bridge_num)
+{
+ /* Since we refcount bridges, we know that when we call this function
+ * it is no longer in use, so we can just go ahead and remove it from
+ * the bit mask.
+ */
+ clear_bit(bridge_num, &dsa_fwd_offloading_bridges);
+}
+
+struct dsa_switch *dsa_switch_find(int tree_index, int sw_index)
+{
+ struct dsa_switch_tree *dst;
+ struct dsa_port *dp;
+
+ list_for_each_entry(dst, &dsa_tree_list, list) {
+ if (dst->index != tree_index)
+ continue;
+
+ list_for_each_entry(dp, &dst->ports, list) {
+ if (dp->ds->index != sw_index)
+ continue;
+
+ return dp->ds;
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(dsa_switch_find);
+
+static struct dsa_switch_tree *dsa_tree_find(int index)
+{
+ struct dsa_switch_tree *dst;
+
+ list_for_each_entry(dst, &dsa_tree_list, list)
+ if (dst->index == index)
+ return dst;
+
+ return NULL;
+}
+
+static struct dsa_switch_tree *dsa_tree_alloc(int index)
+{
+ struct dsa_switch_tree *dst;
+
+ dst = kzalloc(sizeof(*dst), GFP_KERNEL);
+ if (!dst)
+ return NULL;
+
+ dst->index = index;
+
+ INIT_LIST_HEAD(&dst->rtable);
+
+ INIT_LIST_HEAD(&dst->ports);
+
+ INIT_LIST_HEAD(&dst->list);
+ list_add_tail(&dst->list, &dsa_tree_list);
+
+ kref_init(&dst->refcount);
+
+ return dst;
+}
+
+static void dsa_tree_free(struct dsa_switch_tree *dst)
+{
+ if (dst->tag_ops)
+ dsa_tag_driver_put(dst->tag_ops);
+ list_del(&dst->list);
+ kfree(dst);
+}
+
+static struct dsa_switch_tree *dsa_tree_get(struct dsa_switch_tree *dst)
+{
+ if (dst)
+ kref_get(&dst->refcount);
+
+ return dst;
+}
+
+static struct dsa_switch_tree *dsa_tree_touch(int index)
+{
+ struct dsa_switch_tree *dst;
+
+ dst = dsa_tree_find(index);
+ if (dst)
+ return dsa_tree_get(dst);
+ else
+ return dsa_tree_alloc(index);
+}
+
+static void dsa_tree_release(struct kref *ref)
+{
+ struct dsa_switch_tree *dst;
+
+ dst = container_of(ref, struct dsa_switch_tree, refcount);
+
+ dsa_tree_free(dst);
+}
+
+static void dsa_tree_put(struct dsa_switch_tree *dst)
+{
+ if (dst)
+ kref_put(&dst->refcount, dsa_tree_release);
+}
+
+static struct dsa_port *dsa_tree_find_port_by_node(struct dsa_switch_tree *dst,
+ struct device_node *dn)
+{
+ struct dsa_port *dp;
+
+ list_for_each_entry(dp, &dst->ports, list)
+ if (dp->dn == dn)
+ return dp;
+
+ return NULL;
+}
+
+static struct dsa_link *dsa_link_touch(struct dsa_port *dp,
+ struct dsa_port *link_dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_switch_tree *dst;
+ struct dsa_link *dl;
+
+ dst = ds->dst;
+
+ list_for_each_entry(dl, &dst->rtable, list)
+ if (dl->dp == dp && dl->link_dp == link_dp)
+ return dl;
+
+ dl = kzalloc(sizeof(*dl), GFP_KERNEL);
+ if (!dl)
+ return NULL;
+
+ dl->dp = dp;
+ dl->link_dp = link_dp;
+
+ INIT_LIST_HEAD(&dl->list);
+ list_add_tail(&dl->list, &dst->rtable);
+
+ return dl;
+}
+
+static bool dsa_port_setup_routing_table(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ struct dsa_switch_tree *dst = ds->dst;
+ struct device_node *dn = dp->dn;
+ struct of_phandle_iterator it;
+ struct dsa_port *link_dp;
+ struct dsa_link *dl;
+ int err;
+
+ of_for_each_phandle(&it, err, dn, "link", NULL, 0) {
+ link_dp = dsa_tree_find_port_by_node(dst, it.node);
+ if (!link_dp) {
+ of_node_put(it.node);
+ return false;
+ }
+
+ dl = dsa_link_touch(dp, link_dp);
+ if (!dl) {
+ of_node_put(it.node);
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static bool dsa_tree_setup_routing_table(struct dsa_switch_tree *dst)
+{
+ bool complete = true;
+ struct dsa_port *dp;
+
+ list_for_each_entry(dp, &dst->ports, list) {
+ if (dsa_port_is_dsa(dp)) {
+ complete = dsa_port_setup_routing_table(dp);
+ if (!complete)
+ break;
+ }
+ }
+
+ return complete;
+}
+
+static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst)
+{
+ struct dsa_port *dp;
+
+ list_for_each_entry(dp, &dst->ports, list)
+ if (dsa_port_is_cpu(dp))
+ return dp;
+
+ return NULL;
+}
+
+struct net_device *dsa_tree_find_first_master(struct dsa_switch_tree *dst)
+{
+ struct device_node *ethernet;
+ struct net_device *master;
+ struct dsa_port *cpu_dp;
+
+ cpu_dp = dsa_tree_find_first_cpu(dst);
+ ethernet = of_parse_phandle(cpu_dp->dn, "ethernet", 0);
+ master = of_find_net_device_by_node(ethernet);
+ of_node_put(ethernet);
+
+ return master;
+}
+
+/* Assign the default CPU port (the first one in the tree) to all ports of the
+ * fabric which don't already have one as part of their own switch.
+ */
+static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst)
+{
+ struct dsa_port *cpu_dp, *dp;
+
+ cpu_dp = dsa_tree_find_first_cpu(dst);
+ if (!cpu_dp) {
+ pr_err("DSA: tree %d has no CPU port\n", dst->index);
+ return -EINVAL;
+ }
+
+ list_for_each_entry(dp, &dst->ports, list) {
+ if (dp->cpu_dp)
+ continue;
+
+ if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
+ dp->cpu_dp = cpu_dp;
+ }
+
+ return 0;
+}
+
+/* Perform initial assignment of CPU ports to user ports and DSA links in the
+ * fabric, giving preference to CPU ports local to each switch. Default to
+ * using the first CPU port in the switch tree if the port does not have a CPU
+ * port local to this switch.
+ */
+static int dsa_tree_setup_cpu_ports(struct dsa_switch_tree *dst)
+{
+ struct dsa_port *cpu_dp, *dp;
+
+ list_for_each_entry(cpu_dp, &dst->ports, list) {
+ if (!dsa_port_is_cpu(cpu_dp))
+ continue;
+
+ /* Prefer a local CPU port */
+ dsa_switch_for_each_port(dp, cpu_dp->ds) {
+ /* Prefer the first local CPU port found */
+ if (dp->cpu_dp)
+ continue;
+
+ if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
+ dp->cpu_dp = cpu_dp;
+ }
+ }
+
+ return dsa_tree_setup_default_cpu(dst);
+}
+
+static void dsa_tree_teardown_cpu_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_dsa(dp))
+ dp->cpu_dp = NULL;
+}
+
+static int dsa_port_setup(struct dsa_port *dp)
+{
+ bool dsa_port_link_registered = false;
+ struct dsa_switch *ds = dp->ds;
+ bool dsa_port_enabled = false;
+ int err = 0;
+
+ if (dp->setup)
+ return 0;
+
+ err = dsa_port_devlink_setup(dp);
+ if (err)
+ return err;
+
+ switch (dp->type) {
+ case DSA_PORT_TYPE_UNUSED:
+ dsa_port_disable(dp);
+ break;
+ case DSA_PORT_TYPE_CPU:
+ if (dp->dn) {
+ err = dsa_shared_port_link_register_of(dp);
+ if (err)
+ break;
+ dsa_port_link_registered = true;
+ } else {
+ dev_warn(ds->dev,
+ "skipping link registration for CPU port %d\n",
+ dp->index);
+ }
+
+ err = dsa_port_enable(dp, NULL);
+ if (err)
+ break;
+ dsa_port_enabled = true;
+
+ break;
+ case DSA_PORT_TYPE_DSA:
+ if (dp->dn) {
+ err = dsa_shared_port_link_register_of(dp);
+ if (err)
+ break;
+ dsa_port_link_registered = true;
+ } else {
+ dev_warn(ds->dev,
+ "skipping link registration for DSA port %d\n",
+ dp->index);
+ }
+
+ err = dsa_port_enable(dp, NULL);
+ if (err)
+ break;
+ dsa_port_enabled = true;
+
+ break;
+ case DSA_PORT_TYPE_USER:
+ of_get_mac_address(dp->dn, dp->mac);
+ err = dsa_slave_create(dp);
+ break;
+ }
+
+ if (err && dsa_port_enabled)
+ dsa_port_disable(dp);
+ if (err && dsa_port_link_registered)
+ dsa_shared_port_link_unregister_of(dp);
+ if (err) {
+ dsa_port_devlink_teardown(dp);
+ return err;
+ }
+
+ dp->setup = true;
+
+ return 0;
+}
+
+static void dsa_port_teardown(struct dsa_port *dp)
+{
+ if (!dp->setup)
+ return;
+
+ switch (dp->type) {
+ case DSA_PORT_TYPE_UNUSED:
+ break;
+ case DSA_PORT_TYPE_CPU:
+ dsa_port_disable(dp);
+ if (dp->dn)
+ dsa_shared_port_link_unregister_of(dp);
+ 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->slave) {
+ dsa_slave_destroy(dp->slave);
+ dp->slave = 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)
+{
+ struct device_node *dn;
+ int err;
+
+ if (ds->setup)
+ return 0;
+
+ /* Initialize ds->phys_mii_mask before registering the slave MDIO bus
+ * driver and before ops->setup() has run, since the switch drivers and
+ * the slave 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->slave_mii_bus && ds->ops->phy_read) {
+ ds->slave_mii_bus = mdiobus_alloc();
+ if (!ds->slave_mii_bus) {
+ err = -ENOMEM;
+ goto teardown;
+ }
+
+ dsa_slave_mii_bus_init(ds);
+
+ dn = of_get_child_by_name(ds->dev->of_node, "mdio");
+
+ err = of_mdiobus_register(ds->slave_mii_bus, dn);
+ of_node_put(dn);
+ if (err < 0)
+ goto free_slave_mii_bus;
+ }
+
+ dsa_switch_devlink_register(ds);
+
+ ds->setup = true;
+ return 0;
+
+free_slave_mii_bus:
+ if (ds->slave_mii_bus && ds->ops->phy_read)
+ mdiobus_free(ds->slave_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->slave_mii_bus && ds->ops->phy_read) {
+ mdiobus_unregister(ds->slave_mii_bus);
+ mdiobus_free(ds->slave_mii_bus);
+ ds->slave_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_master(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 *master = cpu_dp->master;
+ bool admin_up = (master->flags & IFF_UP) &&
+ !qdisc_tx_is_noop(master);
+
+ err = dsa_master_setup(master, cpu_dp);
+ if (err)
+ break;
+
+ /* Replay master state event */
+ dsa_tree_master_admin_state_change(dst, master, admin_up);
+ dsa_tree_master_oper_state_change(dst, master,
+ netif_oper_up(master));
+ }
+
+ rtnl_unlock();
+
+ return err;
+}
+
+static void dsa_tree_teardown_master(struct dsa_switch_tree *dst)
+{
+ struct dsa_port *cpu_dp;
+
+ rtnl_lock();
+
+ dsa_tree_for_each_cpu_port(cpu_dp, dst) {
+ struct net_device *master = cpu_dp->master;
+
+ /* Synthesizing an "admin down" state is sufficient for
+ * the switches to get a notification if the master is
+ * currently up and running.
+ */
+ dsa_tree_master_admin_state_change(dst, master, false);
+
+ dsa_master_teardown(master);
+ }
+
+ 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_master(dst);
+ if (err)
+ goto teardown_ports;
+
+ err = dsa_tree_setup_lags(dst);
+ if (err)
+ goto teardown_master;
+
+ dst->setup = true;
+
+ pr_info("DSA: tree %d setup\n", dst->index);
+
+ return 0;
+
+teardown_master:
+ dsa_tree_teardown_master(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_master(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 master, 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_master(dp)->flags & IFF_UP)
+ goto out_unlock;
+
+ if (dp->slave->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_master_state_change(struct dsa_switch_tree *dst,
+ struct net_device *master)
+{
+ struct dsa_notifier_master_state_info info;
+ struct dsa_port *cpu_dp = master->dsa_ptr;
+
+ info.master = master;
+ info.operational = dsa_port_master_is_operational(cpu_dp);
+
+ dsa_tree_notify(dst, DSA_NOTIFIER_MASTER_STATE_CHANGE, &info);
+}
+
+void dsa_tree_master_admin_state_change(struct dsa_switch_tree *dst,
+ struct net_device *master,
+ bool up)
+{
+ struct dsa_port *cpu_dp = master->dsa_ptr;
+ bool notify = false;
+
+ /* Don't keep track of admin state on LAG DSA masters,
+ * but rather just of physical DSA masters
+ */
+ if (netif_is_lag_master(master))
+ return;
+
+ if ((dsa_port_master_is_operational(cpu_dp)) !=
+ (up && cpu_dp->master_oper_up))
+ notify = true;
+
+ cpu_dp->master_admin_up = up;
+
+ if (notify)
+ dsa_tree_master_state_change(dst, master);
+}
+
+void dsa_tree_master_oper_state_change(struct dsa_switch_tree *dst,
+ struct net_device *master,
+ bool up)
+{
+ struct dsa_port *cpu_dp = master->dsa_ptr;
+ bool notify = false;
+
+ /* Don't keep track of oper state on LAG DSA masters,
+ * but rather just of physical DSA masters
+ */
+ if (netif_is_lag_master(master))
+ return;
+
+ if ((dsa_port_master_is_operational(cpu_dp)) !=
+ (cpu_dp->master_admin_up && up))
+ notify = true;
+
+ cpu_dp->master_oper_up = up;
+
+ if (notify)
+ dsa_tree_master_state_change(dst, master);
+}
+
+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);
+ 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 *master)
+{
+ 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_slave_dev_check(master)) {
+ mdp = dsa_slave_to_port(master);
+ 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 master device is not itself a DSA slave 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 *master,
+ 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, master);
+ 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->master = master;
+ 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 *master;
+ const char *user_protocol;
+
+ master = of_find_net_device_by_node(ethernet);
+ of_node_put(ethernet);
+ if (!master)
+ return -EPROBE_DEFER;
+
+ user_protocol = of_get_property(dn, "dsa-tag-protocol", NULL);
+ return dsa_port_parse_cpu(dp, master, 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 *master;
+
+ master = dsa_dev_to_net_device(dev);
+ if (!master)
+ return -EPROBE_DEFER;
+
+ dev_put(master);
+
+ return dsa_port_parse_cpu(dp, master, 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 master 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 slave interfaces from being uppers of
+ * the DSA master, so that the system can reboot successfully.
+ */
+void dsa_switch_shutdown(struct dsa_switch *ds)
+{
+ struct net_device *master, *slave_dev;
+ struct dsa_port *dp;
+
+ mutex_lock(&dsa2_mutex);
+
+ if (!ds->setup)
+ goto out;
+
+ rtnl_lock();
+
+ dsa_switch_for_each_user_port(dp, ds) {
+ master = dsa_port_to_master(dp);
+ slave_dev = dp->slave;
+
+ netdev_upper_dev_unlink(master, slave_dev);
+ }
+
+ /* Disconnect from further netdevice notifiers on the master,
+ * since netdev_uses_dsa() will now return false.
+ */
+ dsa_switch_for_each_cpu_port(dp, ds)
+ dp->master->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->slave;
+}
+
+int dsa_switch_suspend(struct dsa_switch *ds)
+{
+ struct dsa_port *dp;
+ int ret = 0;
+
+ /* Suspend slave network devices */
+ dsa_switch_for_each_port(dp, ds) {
+ if (!dsa_port_is_initialized(dp))
+ continue;
+
+ ret = dsa_slave_suspend(dp->slave);
+ 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 slave network devices */
+ dsa_switch_for_each_port(dp, ds) {
+ if (!dsa_port_is_initialized(dp))
+ continue;
+
+ ret = dsa_slave_resume(dp->slave);
+ 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_slave_dev_check(netdev))
+ return ERR_PTR(-ENODEV);
+
+ return dsa_slave_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 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_slave_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;
+
+ return 0;
+
+netlink_register_fail:
+ dsa_slave_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)
+{
+ rtnl_link_unregister(&dsa_link_ops);
+
+ dsa_slave_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");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __DSA_H
+#define __DSA_H
+
+#include <linux/list.h>
+#include <linux/types.h>
+
+struct dsa_db;
+struct dsa_device_ops;
+struct dsa_lag;
+struct dsa_switch_tree;
+struct net_device;
+struct work_struct;
+
+extern struct list_head dsa_tree_list;
+
+bool dsa_db_equal(const struct dsa_db *a, const struct dsa_db *b);
+bool dsa_schedule_work(struct work_struct *work);
+void dsa_lag_map(struct dsa_switch_tree *dst, struct dsa_lag *lag);
+void dsa_lag_unmap(struct dsa_switch_tree *dst, struct dsa_lag *lag);
+struct dsa_lag *dsa_tree_lag_find(struct dsa_switch_tree *dst,
+ const struct net_device *lag_dev);
+struct net_device *dsa_tree_find_first_master(struct dsa_switch_tree *dst);
+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);
+void dsa_tree_master_admin_state_change(struct dsa_switch_tree *dst,
+ struct net_device *master,
+ bool up);
+void dsa_tree_master_oper_state_change(struct dsa_switch_tree *dst,
+ struct net_device *master,
+ bool up);
+unsigned int dsa_bridge_num_get(const struct net_device *bridge_dev, int max);
+void dsa_bridge_num_put(const struct net_device *bridge_dev,
+ unsigned int bridge_num);
+struct dsa_bridge *dsa_tree_bridge_find(struct dsa_switch_tree *dst,
+ const struct net_device *br);
+
+#endif
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DSA topology and switch handling
- *
- * Copyright (c) 2008-2009 Marvell Semiconductor
- * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
- * Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch>
- */
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/slab.h>
-#include <linux/rtnetlink.h>
-#include <linux/of.h>
-#include <linux/of_mdio.h>
-#include <linux/of_net.h>
-#include <net/sch_generic.h>
-
-#include "devlink.h"
-#include "dsa_priv.h"
-#include "master.h"
-#include "port.h"
-#include "slave.h"
-#include "switch.h"
-#include "tag.h"
-
-static DEFINE_MUTEX(dsa2_mutex);
-LIST_HEAD(dsa_tree_list);
-
-static struct workqueue_struct *dsa_owq;
-
-/* Track the bridges with forwarding offload enabled */
-static unsigned long dsa_fwd_offloading_bridges;
-
-bool dsa_schedule_work(struct work_struct *work)
-{
- return queue_work(dsa_owq, work);
-}
-
-void dsa_flush_workqueue(void)
-{
- flush_workqueue(dsa_owq);
-}
-EXPORT_SYMBOL_GPL(dsa_flush_workqueue);
-
-/**
- * dsa_lag_map() - Map LAG structure to a linear LAG array
- * @dst: Tree in which to record the mapping.
- * @lag: LAG structure that is to be mapped to the tree's array.
- *
- * dsa_lag_id/dsa_lag_by_id can then be used to translate between the
- * two spaces. The size of the mapping space is determined by the
- * driver by setting ds->num_lag_ids. It is perfectly legal to leave
- * it unset if it is not needed, in which case these functions become
- * no-ops.
- */
-void dsa_lag_map(struct dsa_switch_tree *dst, struct dsa_lag *lag)
-{
- unsigned int id;
-
- for (id = 1; id <= dst->lags_len; id++) {
- if (!dsa_lag_by_id(dst, id)) {
- dst->lags[id - 1] = lag;
- lag->id = id;
- return;
- }
- }
-
- /* No IDs left, which is OK. Some drivers do not need it. The
- * ones that do, e.g. mv88e6xxx, will discover that dsa_lag_id
- * returns an error for this device when joining the LAG. The
- * driver can then return -EOPNOTSUPP back to DSA, which will
- * fall back to a software LAG.
- */
-}
-
-/**
- * dsa_lag_unmap() - Remove a LAG ID mapping
- * @dst: Tree in which the mapping is recorded.
- * @lag: LAG structure that was mapped.
- *
- * As there may be multiple users of the mapping, it is only removed
- * if there are no other references to it.
- */
-void dsa_lag_unmap(struct dsa_switch_tree *dst, struct dsa_lag *lag)
-{
- unsigned int id;
-
- dsa_lags_foreach_id(id, dst) {
- if (dsa_lag_by_id(dst, id) == lag) {
- dst->lags[id - 1] = NULL;
- lag->id = 0;
- break;
- }
- }
-}
-
-struct dsa_lag *dsa_tree_lag_find(struct dsa_switch_tree *dst,
- const struct net_device *lag_dev)
-{
- struct dsa_port *dp;
-
- list_for_each_entry(dp, &dst->ports, list)
- if (dsa_port_lag_dev_get(dp) == lag_dev)
- return dp->lag;
-
- return NULL;
-}
-
-struct dsa_bridge *dsa_tree_bridge_find(struct dsa_switch_tree *dst,
- const struct net_device *br)
-{
- struct dsa_port *dp;
-
- list_for_each_entry(dp, &dst->ports, list)
- if (dsa_port_bridge_dev_get(dp) == br)
- return dp->bridge;
-
- return NULL;
-}
-
-static int dsa_bridge_num_find(const struct net_device *bridge_dev)
-{
- struct dsa_switch_tree *dst;
-
- list_for_each_entry(dst, &dsa_tree_list, list) {
- struct dsa_bridge *bridge;
-
- bridge = dsa_tree_bridge_find(dst, bridge_dev);
- if (bridge)
- return bridge->num;
- }
-
- return 0;
-}
-
-unsigned int dsa_bridge_num_get(const struct net_device *bridge_dev, int max)
-{
- unsigned int bridge_num = dsa_bridge_num_find(bridge_dev);
-
- /* Switches without FDB isolation support don't get unique
- * bridge numbering
- */
- if (!max)
- return 0;
-
- if (!bridge_num) {
- /* First port that requests FDB isolation or TX forwarding
- * offload for this bridge
- */
- bridge_num = find_next_zero_bit(&dsa_fwd_offloading_bridges,
- DSA_MAX_NUM_OFFLOADING_BRIDGES,
- 1);
- if (bridge_num >= max)
- return 0;
-
- set_bit(bridge_num, &dsa_fwd_offloading_bridges);
- }
-
- return bridge_num;
-}
-
-void dsa_bridge_num_put(const struct net_device *bridge_dev,
- unsigned int bridge_num)
-{
- /* Since we refcount bridges, we know that when we call this function
- * it is no longer in use, so we can just go ahead and remove it from
- * the bit mask.
- */
- clear_bit(bridge_num, &dsa_fwd_offloading_bridges);
-}
-
-struct dsa_switch *dsa_switch_find(int tree_index, int sw_index)
-{
- struct dsa_switch_tree *dst;
- struct dsa_port *dp;
-
- list_for_each_entry(dst, &dsa_tree_list, list) {
- if (dst->index != tree_index)
- continue;
-
- list_for_each_entry(dp, &dst->ports, list) {
- if (dp->ds->index != sw_index)
- continue;
-
- return dp->ds;
- }
- }
-
- return NULL;
-}
-EXPORT_SYMBOL_GPL(dsa_switch_find);
-
-static struct dsa_switch_tree *dsa_tree_find(int index)
-{
- struct dsa_switch_tree *dst;
-
- list_for_each_entry(dst, &dsa_tree_list, list)
- if (dst->index == index)
- return dst;
-
- return NULL;
-}
-
-static struct dsa_switch_tree *dsa_tree_alloc(int index)
-{
- struct dsa_switch_tree *dst;
-
- dst = kzalloc(sizeof(*dst), GFP_KERNEL);
- if (!dst)
- return NULL;
-
- dst->index = index;
-
- INIT_LIST_HEAD(&dst->rtable);
-
- INIT_LIST_HEAD(&dst->ports);
-
- INIT_LIST_HEAD(&dst->list);
- list_add_tail(&dst->list, &dsa_tree_list);
-
- kref_init(&dst->refcount);
-
- return dst;
-}
-
-static void dsa_tree_free(struct dsa_switch_tree *dst)
-{
- if (dst->tag_ops)
- dsa_tag_driver_put(dst->tag_ops);
- list_del(&dst->list);
- kfree(dst);
-}
-
-static struct dsa_switch_tree *dsa_tree_get(struct dsa_switch_tree *dst)
-{
- if (dst)
- kref_get(&dst->refcount);
-
- return dst;
-}
-
-static struct dsa_switch_tree *dsa_tree_touch(int index)
-{
- struct dsa_switch_tree *dst;
-
- dst = dsa_tree_find(index);
- if (dst)
- return dsa_tree_get(dst);
- else
- return dsa_tree_alloc(index);
-}
-
-static void dsa_tree_release(struct kref *ref)
-{
- struct dsa_switch_tree *dst;
-
- dst = container_of(ref, struct dsa_switch_tree, refcount);
-
- dsa_tree_free(dst);
-}
-
-static void dsa_tree_put(struct dsa_switch_tree *dst)
-{
- if (dst)
- kref_put(&dst->refcount, dsa_tree_release);
-}
-
-static struct dsa_port *dsa_tree_find_port_by_node(struct dsa_switch_tree *dst,
- struct device_node *dn)
-{
- struct dsa_port *dp;
-
- list_for_each_entry(dp, &dst->ports, list)
- if (dp->dn == dn)
- return dp;
-
- return NULL;
-}
-
-static struct dsa_link *dsa_link_touch(struct dsa_port *dp,
- struct dsa_port *link_dp)
-{
- struct dsa_switch *ds = dp->ds;
- struct dsa_switch_tree *dst;
- struct dsa_link *dl;
-
- dst = ds->dst;
-
- list_for_each_entry(dl, &dst->rtable, list)
- if (dl->dp == dp && dl->link_dp == link_dp)
- return dl;
-
- dl = kzalloc(sizeof(*dl), GFP_KERNEL);
- if (!dl)
- return NULL;
-
- dl->dp = dp;
- dl->link_dp = link_dp;
-
- INIT_LIST_HEAD(&dl->list);
- list_add_tail(&dl->list, &dst->rtable);
-
- return dl;
-}
-
-static bool dsa_port_setup_routing_table(struct dsa_port *dp)
-{
- struct dsa_switch *ds = dp->ds;
- struct dsa_switch_tree *dst = ds->dst;
- struct device_node *dn = dp->dn;
- struct of_phandle_iterator it;
- struct dsa_port *link_dp;
- struct dsa_link *dl;
- int err;
-
- of_for_each_phandle(&it, err, dn, "link", NULL, 0) {
- link_dp = dsa_tree_find_port_by_node(dst, it.node);
- if (!link_dp) {
- of_node_put(it.node);
- return false;
- }
-
- dl = dsa_link_touch(dp, link_dp);
- if (!dl) {
- of_node_put(it.node);
- return false;
- }
- }
-
- return true;
-}
-
-static bool dsa_tree_setup_routing_table(struct dsa_switch_tree *dst)
-{
- bool complete = true;
- struct dsa_port *dp;
-
- list_for_each_entry(dp, &dst->ports, list) {
- if (dsa_port_is_dsa(dp)) {
- complete = dsa_port_setup_routing_table(dp);
- if (!complete)
- break;
- }
- }
-
- return complete;
-}
-
-static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst)
-{
- struct dsa_port *dp;
-
- list_for_each_entry(dp, &dst->ports, list)
- if (dsa_port_is_cpu(dp))
- return dp;
-
- return NULL;
-}
-
-struct net_device *dsa_tree_find_first_master(struct dsa_switch_tree *dst)
-{
- struct device_node *ethernet;
- struct net_device *master;
- struct dsa_port *cpu_dp;
-
- cpu_dp = dsa_tree_find_first_cpu(dst);
- ethernet = of_parse_phandle(cpu_dp->dn, "ethernet", 0);
- master = of_find_net_device_by_node(ethernet);
- of_node_put(ethernet);
-
- return master;
-}
-
-/* Assign the default CPU port (the first one in the tree) to all ports of the
- * fabric which don't already have one as part of their own switch.
- */
-static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst)
-{
- struct dsa_port *cpu_dp, *dp;
-
- cpu_dp = dsa_tree_find_first_cpu(dst);
- if (!cpu_dp) {
- pr_err("DSA: tree %d has no CPU port\n", dst->index);
- return -EINVAL;
- }
-
- list_for_each_entry(dp, &dst->ports, list) {
- if (dp->cpu_dp)
- continue;
-
- if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
- dp->cpu_dp = cpu_dp;
- }
-
- return 0;
-}
-
-/* Perform initial assignment of CPU ports to user ports and DSA links in the
- * fabric, giving preference to CPU ports local to each switch. Default to
- * using the first CPU port in the switch tree if the port does not have a CPU
- * port local to this switch.
- */
-static int dsa_tree_setup_cpu_ports(struct dsa_switch_tree *dst)
-{
- struct dsa_port *cpu_dp, *dp;
-
- list_for_each_entry(cpu_dp, &dst->ports, list) {
- if (!dsa_port_is_cpu(cpu_dp))
- continue;
-
- /* Prefer a local CPU port */
- dsa_switch_for_each_port(dp, cpu_dp->ds) {
- /* Prefer the first local CPU port found */
- if (dp->cpu_dp)
- continue;
-
- if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
- dp->cpu_dp = cpu_dp;
- }
- }
-
- return dsa_tree_setup_default_cpu(dst);
-}
-
-static void dsa_tree_teardown_cpu_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_dsa(dp))
- dp->cpu_dp = NULL;
-}
-
-static int dsa_port_setup(struct dsa_port *dp)
-{
- bool dsa_port_link_registered = false;
- struct dsa_switch *ds = dp->ds;
- bool dsa_port_enabled = false;
- int err = 0;
-
- if (dp->setup)
- return 0;
-
- err = dsa_port_devlink_setup(dp);
- if (err)
- return err;
-
- switch (dp->type) {
- case DSA_PORT_TYPE_UNUSED:
- dsa_port_disable(dp);
- break;
- case DSA_PORT_TYPE_CPU:
- if (dp->dn) {
- err = dsa_shared_port_link_register_of(dp);
- if (err)
- break;
- dsa_port_link_registered = true;
- } else {
- dev_warn(ds->dev,
- "skipping link registration for CPU port %d\n",
- dp->index);
- }
-
- err = dsa_port_enable(dp, NULL);
- if (err)
- break;
- dsa_port_enabled = true;
-
- break;
- case DSA_PORT_TYPE_DSA:
- if (dp->dn) {
- err = dsa_shared_port_link_register_of(dp);
- if (err)
- break;
- dsa_port_link_registered = true;
- } else {
- dev_warn(ds->dev,
- "skipping link registration for DSA port %d\n",
- dp->index);
- }
-
- err = dsa_port_enable(dp, NULL);
- if (err)
- break;
- dsa_port_enabled = true;
-
- break;
- case DSA_PORT_TYPE_USER:
- of_get_mac_address(dp->dn, dp->mac);
- err = dsa_slave_create(dp);
- break;
- }
-
- if (err && dsa_port_enabled)
- dsa_port_disable(dp);
- if (err && dsa_port_link_registered)
- dsa_shared_port_link_unregister_of(dp);
- if (err) {
- dsa_port_devlink_teardown(dp);
- return err;
- }
-
- dp->setup = true;
-
- return 0;
-}
-
-static void dsa_port_teardown(struct dsa_port *dp)
-{
- if (!dp->setup)
- return;
-
- switch (dp->type) {
- case DSA_PORT_TYPE_UNUSED:
- break;
- case DSA_PORT_TYPE_CPU:
- dsa_port_disable(dp);
- if (dp->dn)
- dsa_shared_port_link_unregister_of(dp);
- 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->slave) {
- dsa_slave_destroy(dp->slave);
- dp->slave = 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)
-{
- struct device_node *dn;
- int err;
-
- if (ds->setup)
- return 0;
-
- /* Initialize ds->phys_mii_mask before registering the slave MDIO bus
- * driver and before ops->setup() has run, since the switch drivers and
- * the slave 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->slave_mii_bus && ds->ops->phy_read) {
- ds->slave_mii_bus = mdiobus_alloc();
- if (!ds->slave_mii_bus) {
- err = -ENOMEM;
- goto teardown;
- }
-
- dsa_slave_mii_bus_init(ds);
-
- dn = of_get_child_by_name(ds->dev->of_node, "mdio");
-
- err = of_mdiobus_register(ds->slave_mii_bus, dn);
- of_node_put(dn);
- if (err < 0)
- goto free_slave_mii_bus;
- }
-
- dsa_switch_devlink_register(ds);
-
- ds->setup = true;
- return 0;
-
-free_slave_mii_bus:
- if (ds->slave_mii_bus && ds->ops->phy_read)
- mdiobus_free(ds->slave_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->slave_mii_bus && ds->ops->phy_read) {
- mdiobus_unregister(ds->slave_mii_bus);
- mdiobus_free(ds->slave_mii_bus);
- ds->slave_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_master(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 *master = cpu_dp->master;
- bool admin_up = (master->flags & IFF_UP) &&
- !qdisc_tx_is_noop(master);
-
- err = dsa_master_setup(master, cpu_dp);
- if (err)
- break;
-
- /* Replay master state event */
- dsa_tree_master_admin_state_change(dst, master, admin_up);
- dsa_tree_master_oper_state_change(dst, master,
- netif_oper_up(master));
- }
-
- rtnl_unlock();
-
- return err;
-}
-
-static void dsa_tree_teardown_master(struct dsa_switch_tree *dst)
-{
- struct dsa_port *cpu_dp;
-
- rtnl_lock();
-
- dsa_tree_for_each_cpu_port(cpu_dp, dst) {
- struct net_device *master = cpu_dp->master;
-
- /* Synthesizing an "admin down" state is sufficient for
- * the switches to get a notification if the master is
- * currently up and running.
- */
- dsa_tree_master_admin_state_change(dst, master, false);
-
- dsa_master_teardown(master);
- }
-
- 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_master(dst);
- if (err)
- goto teardown_ports;
-
- err = dsa_tree_setup_lags(dst);
- if (err)
- goto teardown_master;
-
- dst->setup = true;
-
- pr_info("DSA: tree %d setup\n", dst->index);
-
- return 0;
-
-teardown_master:
- dsa_tree_teardown_master(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_master(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 master, 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_master(dp)->flags & IFF_UP)
- goto out_unlock;
-
- if (dp->slave->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_master_state_change(struct dsa_switch_tree *dst,
- struct net_device *master)
-{
- struct dsa_notifier_master_state_info info;
- struct dsa_port *cpu_dp = master->dsa_ptr;
-
- info.master = master;
- info.operational = dsa_port_master_is_operational(cpu_dp);
-
- dsa_tree_notify(dst, DSA_NOTIFIER_MASTER_STATE_CHANGE, &info);
-}
-
-void dsa_tree_master_admin_state_change(struct dsa_switch_tree *dst,
- struct net_device *master,
- bool up)
-{
- struct dsa_port *cpu_dp = master->dsa_ptr;
- bool notify = false;
-
- /* Don't keep track of admin state on LAG DSA masters,
- * but rather just of physical DSA masters
- */
- if (netif_is_lag_master(master))
- return;
-
- if ((dsa_port_master_is_operational(cpu_dp)) !=
- (up && cpu_dp->master_oper_up))
- notify = true;
-
- cpu_dp->master_admin_up = up;
-
- if (notify)
- dsa_tree_master_state_change(dst, master);
-}
-
-void dsa_tree_master_oper_state_change(struct dsa_switch_tree *dst,
- struct net_device *master,
- bool up)
-{
- struct dsa_port *cpu_dp = master->dsa_ptr;
- bool notify = false;
-
- /* Don't keep track of oper state on LAG DSA masters,
- * but rather just of physical DSA masters
- */
- if (netif_is_lag_master(master))
- return;
-
- if ((dsa_port_master_is_operational(cpu_dp)) !=
- (cpu_dp->master_admin_up && up))
- notify = true;
-
- cpu_dp->master_oper_up = up;
-
- if (notify)
- dsa_tree_master_state_change(dst, master);
-}
-
-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);
- 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 *master)
-{
- 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_slave_dev_check(master)) {
- mdp = dsa_slave_to_port(master);
- 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 master device is not itself a DSA slave 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 *master,
- 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, master);
- 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->master = master;
- 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 *master;
- const char *user_protocol;
-
- master = of_find_net_device_by_node(ethernet);
- of_node_put(ethernet);
- if (!master)
- return -EPROBE_DEFER;
-
- user_protocol = of_get_property(dn, "dsa-tag-protocol", NULL);
- return dsa_port_parse_cpu(dp, master, 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 *master;
-
- master = dsa_dev_to_net_device(dev);
- if (!master)
- return -EPROBE_DEFER;
-
- dev_put(master);
-
- return dsa_port_parse_cpu(dp, master, 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 master 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 slave interfaces from being uppers of
- * the DSA master, so that the system can reboot successfully.
- */
-void dsa_switch_shutdown(struct dsa_switch *ds)
-{
- struct net_device *master, *slave_dev;
- struct dsa_port *dp;
-
- mutex_lock(&dsa2_mutex);
-
- if (!ds->setup)
- goto out;
-
- rtnl_lock();
-
- dsa_switch_for_each_user_port(dp, ds) {
- master = dsa_port_to_master(dp);
- slave_dev = dp->slave;
-
- netdev_upper_dev_unlink(master, slave_dev);
- }
-
- /* Disconnect from further netdevice notifiers on the master,
- * since netdev_uses_dsa() will now return false.
- */
- dsa_switch_for_each_cpu_port(dp, ds)
- dp->master->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->slave;
-}
-
-int dsa_switch_suspend(struct dsa_switch *ds)
-{
- struct dsa_port *dp;
- int ret = 0;
-
- /* Suspend slave network devices */
- dsa_switch_for_each_port(dp, ds) {
- if (!dsa_port_is_initialized(dp))
- continue;
-
- ret = dsa_slave_suspend(dp->slave);
- 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 slave network devices */
- dsa_switch_for_each_port(dp, ds) {
- if (!dsa_port_is_initialized(dp))
- continue;
-
- ret = dsa_slave_resume(dp->slave);
- 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_slave_dev_check(netdev))
- return ERR_PTR(-ENODEV);
-
- return dsa_slave_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 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_slave_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;
-
- return 0;
-
-netlink_register_fail:
- dsa_slave_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)
-{
- rtnl_link_unregister(&dsa_link_ops);
-
- dsa_slave_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");
u16 vid;
};
-/* dsa.c */
-bool dsa_db_equal(const struct dsa_db *a, const struct dsa_db *b);
-
-bool dsa_schedule_work(struct work_struct *work);
-
/* netlink.c */
extern struct rtnl_link_ops dsa_link_ops __read_mostly;
!ds->needs_standalone_vlan_filtering;
}
-/* dsa2.c */
-void dsa_lag_map(struct dsa_switch_tree *dst, struct dsa_lag *lag);
-void dsa_lag_unmap(struct dsa_switch_tree *dst, struct dsa_lag *lag);
-struct dsa_lag *dsa_tree_lag_find(struct dsa_switch_tree *dst,
- const struct net_device *lag_dev);
-struct net_device *dsa_tree_find_first_master(struct dsa_switch_tree *dst);
-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);
-void dsa_tree_master_admin_state_change(struct dsa_switch_tree *dst,
- struct net_device *master,
- bool up);
-void dsa_tree_master_oper_state_change(struct dsa_switch_tree *dst,
- struct net_device *master,
- bool up);
-unsigned int dsa_bridge_num_get(const struct net_device *bridge_dev, int max);
-void dsa_bridge_num_put(const struct net_device *bridge_dev,
- unsigned int bridge_num);
-struct dsa_bridge *dsa_tree_bridge_find(struct dsa_switch_tree *dst,
- const struct net_device *br);
-
/* tag_8021q.c */
int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
struct dsa_notifier_tag_8021q_vlan_info *info);
int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds,
struct dsa_notifier_tag_8021q_vlan_info *info);
-extern struct list_head dsa_tree_list;
-
#endif
#include <linux/netlink.h>
#include <net/dsa.h>
-#include "dsa_priv.h"
+#include "dsa.h"
#include "master.h"
#include "port.h"
#include "tag.h"
#include <linux/of_mdio.h>
#include <linux/of_net.h>
-#include "dsa_priv.h"
+#include "dsa.h"
#include "port.h"
#include "slave.h"
#include "switch.h"
#include <net/dcbnl.h>
#include <linux/netpoll.h>
+#include "dsa.h"
#include "dsa_priv.h"
#include "port.h"
#include "master.h"
#include <linux/if_vlan.h>
#include <net/switchdev.h>
+#include "dsa.h"
#include "dsa_priv.h"
#include "port.h"
#include "slave.h"
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