| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * net/dsa/dsa2.c - Hardware switch handling, binding version 2 |
| * 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/netdevice.h> |
| #include <linux/slab.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/of.h> |
| #include <linux/of_net.h> |
| #include <net/devlink.h> |
| |
| #include "dsa_priv.h" |
| |
| static LIST_HEAD(dsa_tree_list); |
| static DEFINE_MUTEX(dsa2_mutex); |
| |
| static const struct devlink_ops dsa_devlink_ops = { |
| }; |
| |
| 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) |
| { |
| 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 bool dsa_port_is_dsa(struct dsa_port *port) |
| { |
| return port->type == DSA_PORT_TYPE_DSA; |
| } |
| |
| static bool dsa_port_is_cpu(struct dsa_port *port) |
| { |
| return port->type == DSA_PORT_TYPE_CPU; |
| } |
| |
| static bool dsa_port_is_user(struct dsa_port *dp) |
| { |
| return dp->type == DSA_PORT_TYPE_USER; |
| } |
| |
| 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; |
| } |
| |
| 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; |
| } |
| |
| /* Assign the default CPU port to all ports of the fabric */ |
| list_for_each_entry(dp, &dst->ports, list) |
| if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp)) |
| dp->cpu_dp = cpu_dp; |
| |
| return 0; |
| } |
| |
| static void dsa_tree_teardown_default_cpu(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) |
| { |
| struct dsa_switch *ds = dp->ds; |
| struct dsa_switch_tree *dst = ds->dst; |
| const unsigned char *id = (const unsigned char *)&dst->index; |
| const unsigned char len = sizeof(dst->index); |
| struct devlink_port *dlp = &dp->devlink_port; |
| bool dsa_port_link_registered = false; |
| bool devlink_port_registered = false; |
| struct devlink *dl = ds->devlink; |
| bool dsa_port_enabled = false; |
| int err = 0; |
| |
| if (dp->setup) |
| return 0; |
| |
| switch (dp->type) { |
| case DSA_PORT_TYPE_UNUSED: |
| dsa_port_disable(dp); |
| break; |
| case DSA_PORT_TYPE_CPU: |
| memset(dlp, 0, sizeof(*dlp)); |
| devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_CPU, |
| dp->index, false, 0, id, len); |
| err = devlink_port_register(dl, dlp, dp->index); |
| if (err) |
| break; |
| devlink_port_registered = true; |
| |
| err = dsa_port_link_register_of(dp); |
| if (err) |
| break; |
| dsa_port_link_registered = true; |
| |
| err = dsa_port_enable(dp, NULL); |
| if (err) |
| break; |
| dsa_port_enabled = true; |
| |
| break; |
| case DSA_PORT_TYPE_DSA: |
| memset(dlp, 0, sizeof(*dlp)); |
| devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_DSA, |
| dp->index, false, 0, id, len); |
| err = devlink_port_register(dl, dlp, dp->index); |
| if (err) |
| break; |
| devlink_port_registered = true; |
| |
| err = dsa_port_link_register_of(dp); |
| if (err) |
| break; |
| dsa_port_link_registered = true; |
| |
| err = dsa_port_enable(dp, NULL); |
| if (err) |
| break; |
| dsa_port_enabled = true; |
| |
| break; |
| case DSA_PORT_TYPE_USER: |
| memset(dlp, 0, sizeof(*dlp)); |
| devlink_port_attrs_set(dlp, DEVLINK_PORT_FLAVOUR_PHYSICAL, |
| dp->index, false, 0, id, len); |
| err = devlink_port_register(dl, dlp, dp->index); |
| if (err) |
| break; |
| devlink_port_registered = true; |
| |
| dp->mac = of_get_mac_address(dp->dn); |
| err = dsa_slave_create(dp); |
| if (err) |
| break; |
| |
| devlink_port_type_eth_set(dlp, dp->slave); |
| break; |
| } |
| |
| if (err && dsa_port_enabled) |
| dsa_port_disable(dp); |
| if (err && dsa_port_link_registered) |
| dsa_port_link_unregister_of(dp); |
| if (err && devlink_port_registered) |
| devlink_port_unregister(dlp); |
| if (err) |
| return err; |
| |
| dp->setup = true; |
| |
| return 0; |
| } |
| |
| static void dsa_port_teardown(struct dsa_port *dp) |
| { |
| struct devlink_port *dlp = &dp->devlink_port; |
| |
| if (!dp->setup) |
| return; |
| |
| switch (dp->type) { |
| case DSA_PORT_TYPE_UNUSED: |
| break; |
| case DSA_PORT_TYPE_CPU: |
| dsa_port_disable(dp); |
| dsa_tag_driver_put(dp->tag_ops); |
| devlink_port_unregister(dlp); |
| dsa_port_link_unregister_of(dp); |
| break; |
| case DSA_PORT_TYPE_DSA: |
| dsa_port_disable(dp); |
| devlink_port_unregister(dlp); |
| dsa_port_link_unregister_of(dp); |
| break; |
| case DSA_PORT_TYPE_USER: |
| devlink_port_unregister(dlp); |
| if (dp->slave) { |
| dsa_slave_destroy(dp->slave); |
| dp->slave = NULL; |
| } |
| break; |
| } |
| |
| dp->setup = false; |
| } |
| |
| static int dsa_switch_setup(struct dsa_switch *ds) |
| { |
| struct dsa_devlink_priv *dl_priv; |
| 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); |
| |
| /* Add the switch to devlink before calling setup, so that setup can |
| * add dpipe tables |
| */ |
| ds->devlink = devlink_alloc(&dsa_devlink_ops, sizeof(*dl_priv)); |
| if (!ds->devlink) |
| return -ENOMEM; |
| dl_priv = devlink_priv(ds->devlink); |
| dl_priv->ds = ds; |
| |
| err = devlink_register(ds->devlink, ds->dev); |
| if (err) |
| goto free_devlink; |
| |
| err = dsa_switch_register_notifier(ds); |
| if (err) |
| goto unregister_devlink; |
| |
| err = ds->ops->setup(ds); |
| if (err < 0) |
| goto unregister_notifier; |
| |
| devlink_params_publish(ds->devlink); |
| |
| if (!ds->slave_mii_bus && ds->ops->phy_read) { |
| ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev); |
| if (!ds->slave_mii_bus) { |
| err = -ENOMEM; |
| goto unregister_notifier; |
| } |
| |
| dsa_slave_mii_bus_init(ds); |
| |
| err = mdiobus_register(ds->slave_mii_bus); |
| if (err < 0) |
| goto unregister_notifier; |
| } |
| |
| ds->setup = true; |
| |
| return 0; |
| |
| unregister_notifier: |
| dsa_switch_unregister_notifier(ds); |
| unregister_devlink: |
| devlink_unregister(ds->devlink); |
| free_devlink: |
| devlink_free(ds->devlink); |
| ds->devlink = NULL; |
| |
| return err; |
| } |
| |
| static void dsa_switch_teardown(struct dsa_switch *ds) |
| { |
| if (!ds->setup) |
| return; |
| |
| if (ds->slave_mii_bus && ds->ops->phy_read) |
| mdiobus_unregister(ds->slave_mii_bus); |
| |
| dsa_switch_unregister_notifier(ds); |
| |
| if (ds->ops->teardown) |
| ds->ops->teardown(ds); |
| |
| if (ds->devlink) { |
| devlink_unregister(ds->devlink); |
| devlink_free(ds->devlink); |
| ds->devlink = NULL; |
| } |
| |
| ds->setup = false; |
| } |
| |
| static int dsa_tree_setup_switches(struct dsa_switch_tree *dst) |
| { |
| struct dsa_port *dp; |
| int err; |
| |
| list_for_each_entry(dp, &dst->ports, list) { |
| err = dsa_switch_setup(dp->ds); |
| if (err) |
| goto teardown; |
| } |
| |
| list_for_each_entry(dp, &dst->ports, list) { |
| err = dsa_port_setup(dp); |
| if (err) |
| goto teardown; |
| } |
| |
| return 0; |
| |
| teardown: |
| list_for_each_entry(dp, &dst->ports, list) |
| dsa_port_teardown(dp); |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| dsa_switch_teardown(dp->ds); |
| |
| return err; |
| } |
| |
| static void dsa_tree_teardown_switches(struct dsa_switch_tree *dst) |
| { |
| struct dsa_port *dp; |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| dsa_port_teardown(dp); |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| dsa_switch_teardown(dp->ds); |
| } |
| |
| static int dsa_tree_setup_master(struct dsa_switch_tree *dst) |
| { |
| struct dsa_port *dp; |
| int err; |
| |
| list_for_each_entry(dp, &dst->ports, list) { |
| if (dsa_port_is_cpu(dp)) { |
| err = dsa_master_setup(dp->master, dp); |
| if (err) |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void dsa_tree_teardown_master(struct dsa_switch_tree *dst) |
| { |
| struct dsa_port *dp; |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| if (dsa_port_is_cpu(dp)) |
| dsa_master_teardown(dp->master); |
| } |
| |
| 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_default_cpu(dst); |
| if (err) |
| return err; |
| |
| err = dsa_tree_setup_switches(dst); |
| if (err) |
| goto teardown_default_cpu; |
| |
| err = dsa_tree_setup_master(dst); |
| if (err) |
| goto teardown_switches; |
| |
| dst->setup = true; |
| |
| pr_info("DSA: tree %d setup\n", dst->index); |
| |
| return 0; |
| |
| teardown_switches: |
| dsa_tree_teardown_switches(dst); |
| teardown_default_cpu: |
| dsa_tree_teardown_default_cpu(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_master(dst); |
| |
| dsa_tree_teardown_switches(dst); |
| |
| dsa_tree_teardown_default_cpu(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 struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index) |
| { |
| struct dsa_switch_tree *dst = ds->dst; |
| struct dsa_port *dp; |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| if (dp->ds == ds && dp->index == index) |
| return dp; |
| |
| dp = kzalloc(sizeof(*dp), GFP_KERNEL); |
| if (!dp) |
| return NULL; |
| |
| dp->ds = ds; |
| dp->index = index; |
| |
| 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) |
| { |
| if (!name) |
| name = "eth%d"; |
| |
| 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 int dsa_port_parse_cpu(struct dsa_port *dp, struct net_device *master) |
| { |
| struct dsa_switch *ds = dp->ds; |
| struct dsa_switch_tree *dst = ds->dst; |
| const struct dsa_device_ops *tag_ops; |
| enum dsa_tag_protocol tag_protocol; |
| |
| tag_protocol = ds->ops->get_tag_protocol(ds, dp->index); |
| tag_ops = dsa_tag_driver_get(tag_protocol); |
| 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); |
| } |
| |
| dp->type = DSA_PORT_TYPE_CPU; |
| dp->filter = tag_ops->filter; |
| dp->rcv = tag_ops->rcv; |
| dp->tag_ops = tag_ops; |
| dp->master = master; |
| dp->dst = dst; |
| |
| 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; |
| |
| master = of_find_net_device_by_node(ethernet); |
| if (!master) |
| return -EPROBE_DEFER; |
| |
| return dsa_port_parse_cpu(dp, master); |
| } |
| |
| 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) { |
| 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) |
| goto out_put_node; |
| |
| if (reg >= ds->num_ports) { |
| err = -EINVAL; |
| goto out_put_node; |
| } |
| |
| dp = dsa_to_port(ds, reg); |
| |
| err = dsa_port_parse_of(dp, port); |
| if (err) |
| 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; |
| |
| 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 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); |
| } |
| |
| 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 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); |
| else if (pdata) |
| err = dsa_switch_parse(ds, pdata); |
| else |
| err = -ENODEV; |
| |
| if (err) |
| return err; |
| |
| dst = ds->dst; |
| dsa_tree_get(dst); |
| err = dsa_tree_setup(dst); |
| if (err) |
| 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; |
| struct dsa_port *dp, *next; |
| |
| dsa_tree_teardown(dst); |
| |
| list_for_each_entry_safe(dp, next, &dst->ports, list) { |
| list_del(&dp->list); |
| kfree(dp); |
| } |
| |
| 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); |