Project import generated by Copybara.
GitOrigin-RevId: d6eb47ca943538580bd75ebe6090596d359fbd28
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 70e6fc2..f1792a8 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -1,894 +1,701 @@
-// 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*/
#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 <net/dsa.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 LIST_HEAD(dsa_switch_trees);
static DEFINE_MUTEX(dsa2_mutex);
-static const struct devlink_ops dsa_devlink_ops = {
-};
-
-static struct dsa_switch_tree *dsa_tree_find(int index)
+static struct dsa_switch_tree *dsa_get_dst(u32 tree)
{
struct dsa_switch_tree *dst;
- list_for_each_entry(dst, &dsa_tree_list, list)
- if (dst->index == index)
+ list_for_each_entry(dst, &dsa_switch_trees, list)
+ if (dst->tree == tree) {
+ kref_get(&dst->refcount);
return dst;
-
+ }
return NULL;
}
-static struct dsa_switch_tree *dsa_tree_alloc(int index)
+static void dsa_free_dst(struct kref *ref)
+{
+ struct dsa_switch_tree *dst = container_of(ref, struct dsa_switch_tree,
+ refcount);
+
+ list_del(&dst->list);
+ kfree(dst);
+}
+
+static void dsa_put_dst(struct dsa_switch_tree *dst)
+{
+ kref_put(&dst->refcount, dsa_free_dst);
+}
+
+static struct dsa_switch_tree *dsa_add_dst(u32 tree)
{
struct dsa_switch_tree *dst;
dst = kzalloc(sizeof(*dst), GFP_KERNEL);
if (!dst)
return NULL;
-
- dst->index = index;
-
+ dst->tree = tree;
+ dst->cpu_switch = -1;
INIT_LIST_HEAD(&dst->list);
- list_add_tail(&dst->list, &dsa_tree_list);
-
+ list_add_tail(&dst->list, &dsa_switch_trees);
kref_init(&dst->refcount);
return dst;
}
-static void dsa_tree_free(struct dsa_switch_tree *dst)
+static void dsa_dst_add_ds(struct dsa_switch_tree *dst,
+ struct dsa_switch *ds, u32 index)
{
- list_del(&dst->list);
- kfree(dst);
+ kref_get(&dst->refcount);
+ dst->ds[index] = ds;
}
-static struct dsa_switch_tree *dsa_tree_get(struct dsa_switch_tree *dst)
+static void dsa_dst_del_ds(struct dsa_switch_tree *dst,
+ struct dsa_switch *ds, u32 index)
{
- if (dst)
- kref_get(&dst->refcount);
-
- return dst;
+ dst->ds[index] = NULL;
+ kref_put(&dst->refcount, dsa_free_dst);
}
-static struct dsa_switch_tree *dsa_tree_touch(int index)
+static bool dsa_port_is_dsa(struct device_node *port)
{
- struct dsa_switch_tree *dst;
+ const char *name;
- dst = dsa_tree_find(index);
- if (dst)
- return dsa_tree_get(dst);
- else
- return dsa_tree_alloc(index);
+ name = of_get_property(port, "label", NULL);
+ if (!name)
+ return false;
+
+ if (!strcmp(name, "dsa"))
+ return true;
+
+ return false;
}
-static void dsa_tree_release(struct kref *ref)
+static bool dsa_port_is_cpu(struct device_node *port)
{
- struct dsa_switch_tree *dst;
+ const char *name;
- dst = container_of(ref, struct dsa_switch_tree, refcount);
+ name = of_get_property(port, "label", NULL);
+ if (!name)
+ return false;
- dsa_tree_free(dst);
+ if (!strcmp(name, "cpu"))
+ return true;
+
+ return false;
}
-static void dsa_tree_put(struct dsa_switch_tree *dst)
+static bool dsa_ds_find_port(struct dsa_switch *ds,
+ struct device_node *port)
{
- if (dst)
- kref_put(&dst->refcount, dsa_tree_release);
+ u32 index;
+
+ for (index = 0; index < DSA_MAX_PORTS; index++)
+ if (ds->ports[index].dn == port)
+ return true;
+ return false;
}
-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)
+static struct dsa_switch *dsa_dst_find_port(struct dsa_switch_tree *dst,
+ struct device_node *port)
{
struct dsa_switch *ds;
- struct dsa_port *dp;
- int device, port;
+ u32 index;
- for (device = 0; device < DSA_MAX_SWITCHES; device++) {
- ds = dst->ds[device];
+ for (index = 0; index < DSA_MAX_SWITCHES; index++) {
+ ds = dst->ds[index];
if (!ds)
continue;
- for (port = 0; port < ds->num_ports; port++) {
- dp = &ds->ports[port];
-
- if (dp->dn == dn)
- return dp;
- }
+ if (dsa_ds_find_port(ds, port))
+ return ds;
}
return NULL;
}
-static bool dsa_port_setup_routing_table(struct dsa_port *dp)
+static int dsa_port_complete(struct dsa_switch_tree *dst,
+ struct dsa_switch *src_ds,
+ struct device_node *port,
+ u32 src_port)
{
- 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;
- int err;
+ struct device_node *link;
+ int index;
+ struct dsa_switch *dst_ds;
- 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;
- }
-
- ds->rtable[link_dp->ds->index] = dp->index;
- }
-
- return true;
-}
-
-static bool dsa_switch_setup_routing_table(struct dsa_switch *ds)
-{
- bool complete = true;
- struct dsa_port *dp;
- int i;
-
- for (i = 0; i < DSA_MAX_SWITCHES; i++)
- ds->rtable[i] = DSA_RTABLE_NONE;
-
- for (i = 0; i < ds->num_ports; i++) {
- dp = &ds->ports[i];
-
- if (dsa_port_is_dsa(dp)) {
- complete = dsa_port_setup_routing_table(dp);
- if (!complete)
- break;
- }
- }
-
- return complete;
-}
-
-static bool dsa_tree_setup_routing_table(struct dsa_switch_tree *dst)
-{
- struct dsa_switch *ds;
- bool complete = true;
- int device;
-
- for (device = 0; device < DSA_MAX_SWITCHES; device++) {
- ds = dst->ds[device];
- if (!ds)
- continue;
-
- complete = dsa_switch_setup_routing_table(ds);
- if (!complete)
+ for (index = 0;; index++) {
+ link = of_parse_phandle(port, "link", index);
+ if (!link)
break;
- }
- return complete;
-}
+ dst_ds = dsa_dst_find_port(dst, link);
+ of_node_put(link);
-static struct dsa_port *dsa_tree_find_first_cpu(struct dsa_switch_tree *dst)
-{
- struct dsa_switch *ds;
- struct dsa_port *dp;
- int device, port;
+ if (!dst_ds)
+ return 1;
- for (device = 0; device < DSA_MAX_SWITCHES; device++) {
- ds = dst->ds[device];
- if (!ds)
- continue;
-
- for (port = 0; port < ds->num_ports; port++) {
- dp = &ds->ports[port];
-
- if (dsa_port_is_cpu(dp))
- return dp;
- }
- }
-
- return NULL;
-}
-
-static int dsa_tree_setup_default_cpu(struct dsa_switch_tree *dst)
-{
- struct dsa_switch *ds;
- struct dsa_port *dp;
- int device, port;
-
- /* DSA currently only supports a single CPU port */
- dst->cpu_dp = dsa_tree_find_first_cpu(dst);
- if (!dst->cpu_dp) {
- pr_warn("Tree has no master device\n");
- return -EINVAL;
- }
-
- /* Assign the default CPU port to all ports of the fabric */
- for (device = 0; device < DSA_MAX_SWITCHES; device++) {
- ds = dst->ds[device];
- if (!ds)
- continue;
-
- for (port = 0; port < ds->num_ports; port++) {
- dp = &ds->ports[port];
-
- if (dsa_port_is_user(dp) || dsa_port_is_dsa(dp))
- dp->cpu_dp = dst->cpu_dp;
- }
+ src_ds->rtable[dst_ds->index] = src_port;
}
return 0;
}
-static void dsa_tree_teardown_default_cpu(struct dsa_switch_tree *dst)
+/* A switch is complete if all the DSA ports phandles point to ports
+ * known in the tree. A return value of 1 means the tree is not
+ * complete. This is not an error condition. A value of 0 is
+ * success.
+ */
+static int dsa_ds_complete(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
- /* DSA currently only supports a single CPU port */
- dst->cpu_dp = NULL;
-}
+ struct device_node *port;
+ u32 index;
+ int err;
-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;
+ for (index = 0; index < DSA_MAX_PORTS; index++) {
+ port = ds->ports[index].dn;
+ if (!port)
+ continue;
- 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;
+ if (!dsa_port_is_dsa(port))
+ continue;
- err = dsa_port_link_register_of(dp);
- if (err)
- break;
- dsa_port_link_registered = true;
+ err = dsa_port_complete(dst, ds, port, index);
+ if (err != 0)
+ return err;
- 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;
+ ds->dsa_port_mask |= BIT(index);
}
- 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);
-
- return err;
+ return 0;
}
-static void dsa_port_teardown(struct dsa_port *dp)
+/* A tree is complete if all the DSA ports phandles point to ports
+ * known in the tree. A return value of 1 means the tree is not
+ * complete. This is not an error condition. A value of 0 is
+ * success.
+ */
+static int dsa_dst_complete(struct dsa_switch_tree *dst)
{
- struct devlink_port *dlp = &dp->devlink_port;
+ struct dsa_switch *ds;
+ u32 index;
+ int err;
- 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;
+ for (index = 0; index < DSA_MAX_SWITCHES; index++) {
+ ds = dst->ds[index];
+ if (!ds)
+ continue;
+
+ err = dsa_ds_complete(dst, ds);
+ if (err != 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int dsa_dsa_port_apply(struct device_node *port, u32 index,
+ struct dsa_switch *ds)
+{
+ int err;
+
+ err = dsa_cpu_dsa_setup(ds, ds->dev, port, index);
+ if (err) {
+ dev_warn(ds->dev, "Failed to setup dsa port %d: %d\n",
+ index, err);
+ return err;
+ }
+
+ return 0;
+}
+
+static void dsa_dsa_port_unapply(struct device_node *port, u32 index,
+ struct dsa_switch *ds)
+{
+ dsa_cpu_dsa_destroy(port);
+}
+
+static int dsa_cpu_port_apply(struct device_node *port, u32 index,
+ struct dsa_switch *ds)
+{
+ int err;
+
+ err = dsa_cpu_dsa_setup(ds, ds->dev, port, index);
+ if (err) {
+ dev_warn(ds->dev, "Failed to setup cpu port %d: %d\n",
+ index, err);
+ return err;
+ }
+
+ ds->cpu_port_mask |= BIT(index);
+
+ return 0;
+}
+
+static void dsa_cpu_port_unapply(struct device_node *port, u32 index,
+ struct dsa_switch *ds)
+{
+ dsa_cpu_dsa_destroy(port);
+ ds->cpu_port_mask &= ~BIT(index);
+
+}
+
+static int dsa_user_port_apply(struct device_node *port, u32 index,
+ struct dsa_switch *ds)
+{
+ const char *name;
+ int err;
+
+ name = of_get_property(port, "label", NULL);
+
+ err = dsa_slave_create(ds, ds->dev, index, name);
+ if (err) {
+ dev_warn(ds->dev, "Failed to create slave %d: %d\n",
+ index, err);
+ ds->ports[index].netdev = NULL;
+ return err;
+ }
+
+ return 0;
+}
+
+static void dsa_user_port_unapply(struct device_node *port, u32 index,
+ struct dsa_switch *ds)
+{
+ if (ds->ports[index].netdev) {
+ dsa_slave_destroy(ds->ports[index].netdev);
+ ds->ports[index].netdev = NULL;
+ ds->enabled_port_mask &= ~(1 << index);
}
}
-static int dsa_switch_setup(struct dsa_switch *ds)
+static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
- int err = 0;
+ struct device_node *port;
+ u32 index;
+ int err;
/* 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, 0);
- if (!ds->devlink)
- return -ENOMEM;
-
- err = devlink_register(ds->devlink, ds->dev);
- if (err)
- goto free_devlink;
-
- err = dsa_switch_register_notifier(ds);
- if (err)
- goto unregister_devlink;
+ ds->phys_mii_mask = ds->enabled_port_mask;
err = ds->ops->setup(ds);
if (err < 0)
- goto unregister_notifier;
+ return err;
+
+ if (ds->ops->set_addr) {
+ err = ds->ops->set_addr(ds, dst->master_netdev->dev_addr);
+ if (err < 0)
+ return err;
+ }
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 teardown;
- }
+ if (!ds->slave_mii_bus)
+ return -ENOMEM;
dsa_slave_mii_bus_init(ds);
err = mdiobus_register(ds->slave_mii_bus);
if (err < 0)
- goto teardown;
+ return err;
+ }
+
+ for (index = 0; index < DSA_MAX_PORTS; index++) {
+ port = ds->ports[index].dn;
+ if (!port)
+ continue;
+
+ if (dsa_port_is_dsa(port)) {
+ err = dsa_dsa_port_apply(port, index, ds);
+ if (err)
+ return err;
+ continue;
+ }
+
+ if (dsa_port_is_cpu(port)) {
+ err = dsa_cpu_port_apply(port, index, ds);
+ if (err)
+ return err;
+ continue;
+ }
+
+ err = dsa_user_port_apply(port, index, ds);
+ if (err)
+ continue;
}
return 0;
-
-teardown:
- if (ds->ops->teardown)
- ds->ops->teardown(ds);
-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)
+static void dsa_ds_unapply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
+ struct device_node *port;
+ u32 index;
+
+ for (index = 0; index < DSA_MAX_PORTS; index++) {
+ port = ds->ports[index].dn;
+ if (!port)
+ continue;
+
+ if (dsa_port_is_dsa(port)) {
+ dsa_dsa_port_unapply(port, index, ds);
+ continue;
+ }
+
+ if (dsa_port_is_cpu(port)) {
+ dsa_cpu_port_unapply(port, index, ds);
+ continue;
+ }
+
+ dsa_user_port_unapply(port, index, ds);
+ }
+
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;
- }
-
}
-static int dsa_tree_setup_switches(struct dsa_switch_tree *dst)
+static int dsa_dst_apply(struct dsa_switch_tree *dst)
{
struct dsa_switch *ds;
- struct dsa_port *dp;
- int device, port, i;
- int err = 0;
-
- for (device = 0; device < DSA_MAX_SWITCHES; device++) {
- ds = dst->ds[device];
- if (!ds)
- continue;
-
- err = dsa_switch_setup(ds);
- if (err)
- goto switch_teardown;
-
- for (port = 0; port < ds->num_ports; port++) {
- dp = &ds->ports[port];
-
- err = dsa_port_setup(dp);
- if (err)
- continue;
- }
- }
-
- return 0;
-
-switch_teardown:
- for (i = 0; i < device; i++) {
- ds = dst->ds[i];
- if (!ds)
- continue;
-
- for (port = 0; port < ds->num_ports; port++) {
- dp = &ds->ports[port];
-
- dsa_port_teardown(dp);
- }
-
- dsa_switch_teardown(ds);
- }
-
- return err;
-}
-
-static void dsa_tree_teardown_switches(struct dsa_switch_tree *dst)
-{
- struct dsa_switch *ds;
- struct dsa_port *dp;
- int device, port;
-
- for (device = 0; device < DSA_MAX_SWITCHES; device++) {
- ds = dst->ds[device];
- if (!ds)
- continue;
-
- for (port = 0; port < ds->num_ports; port++) {
- dp = &ds->ports[port];
-
- dsa_port_teardown(dp);
- }
-
- dsa_switch_teardown(ds);
- }
-}
-
-static int dsa_tree_setup_master(struct dsa_switch_tree *dst)
-{
- struct dsa_port *cpu_dp = dst->cpu_dp;
- struct net_device *master = cpu_dp->master;
-
- /* DSA currently supports a single pair of CPU port and master device */
- return dsa_master_setup(master, cpu_dp);
-}
-
-static void dsa_tree_teardown_master(struct dsa_switch_tree *dst)
-{
- struct dsa_port *cpu_dp = dst->cpu_dp;
- struct net_device *master = cpu_dp->master;
-
- return dsa_master_teardown(master);
-}
-
-static int dsa_tree_setup(struct dsa_switch_tree *dst)
-{
- bool complete;
+ u32 index;
int err;
- if (dst->setup) {
- pr_err("DSA: tree %d already setup! Disjoint trees?\n",
- dst->index);
- return -EEXIST;
+ for (index = 0; index < DSA_MAX_SWITCHES; index++) {
+ ds = dst->ds[index];
+ if (!ds)
+ continue;
+
+ err = dsa_ds_apply(dst, ds);
+ if (err)
+ return err;
}
- complete = dsa_tree_setup_routing_table(dst);
- if (!complete)
- return 0;
+ if (dst->ds[0]) {
+ err = dsa_cpu_port_ethtool_setup(dst->ds[0]);
+ if (err)
+ return err;
+ }
- 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);
+ /* If we use a tagging format that doesn't have an ethertype
+ * field, make sure that all packets from this point on get
+ * sent to the tag format's receive function.
+ */
+ wmb();
+ dst->master_netdev->dsa_ptr = (void *)dst;
+ dst->applied = true;
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)
+static void dsa_dst_unapply(struct dsa_switch_tree *dst)
{
- if (!dst->setup)
+ struct dsa_switch *ds;
+ u32 index;
+
+ if (!dst->applied)
return;
- dsa_tree_teardown_master(dst);
+ dst->master_netdev->dsa_ptr = NULL;
- dsa_tree_teardown_switches(dst);
+ /* If we used a tagging format that doesn't have an ethertype
+ * field, make sure that all packets from this point get sent
+ * without the tag and go through the regular receive path.
+ */
+ wmb();
- dsa_tree_teardown_default_cpu(dst);
+ for (index = 0; index < DSA_MAX_SWITCHES; index++) {
+ ds = dst->ds[index];
+ if (!ds)
+ continue;
- pr_info("DSA: tree %d torn down\n", dst->index);
+ dsa_ds_unapply(dst, ds);
+ }
- dst->setup = false;
+ if (dst->ds[0])
+ dsa_cpu_port_ethtool_restore(dst->ds[0]);
+
+ pr_info("DSA: tree %d unapplied\n", dst->tree);
+ dst->applied = false;
}
-static void dsa_tree_remove_switch(struct dsa_switch_tree *dst,
- unsigned int index)
+static int dsa_cpu_parse(struct device_node *port, u32 index,
+ struct dsa_switch_tree *dst,
+ struct dsa_switch *ds)
{
- dsa_tree_teardown(dst);
+ enum dsa_tag_protocol tag_protocol;
+ struct net_device *ethernet_dev;
+ struct device_node *ethernet;
- dst->ds[index] = NULL;
- dsa_tree_put(dst);
+ ethernet = of_parse_phandle(port, "ethernet", 0);
+ if (!ethernet)
+ return -EINVAL;
+
+ ethernet_dev = of_find_net_device_by_node(ethernet);
+ if (!ethernet_dev)
+ return -EPROBE_DEFER;
+
+ if (!ds->master_netdev)
+ ds->master_netdev = ethernet_dev;
+
+ if (!dst->master_netdev)
+ dst->master_netdev = ethernet_dev;
+
+ if (dst->cpu_switch == -1) {
+ dst->cpu_switch = ds->index;
+ dst->cpu_port = index;
+ }
+
+ tag_protocol = ds->ops->get_tag_protocol(ds);
+ dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol);
+ if (IS_ERR(dst->tag_ops)) {
+ dev_warn(ds->dev, "No tagger for this switch\n");
+ return PTR_ERR(dst->tag_ops);
+ }
+
+ dst->rcv = dst->tag_ops->rcv;
+
+ return 0;
}
-static int dsa_tree_add_switch(struct dsa_switch_tree *dst,
- struct dsa_switch *ds)
+static int dsa_ds_parse(struct dsa_switch_tree *dst, struct dsa_switch *ds)
{
- unsigned int index = ds->index;
+ struct device_node *port;
+ u32 index;
int err;
- if (dst->ds[index])
- return -EBUSY;
+ for (index = 0; index < DSA_MAX_PORTS; index++) {
+ port = ds->ports[index].dn;
+ if (!port)
+ continue;
- dsa_tree_get(dst);
- dst->ds[index] = ds;
-
- err = dsa_tree_setup(dst);
- if (err) {
- dst->ds[index] = NULL;
- dsa_tree_put(dst);
+ if (dsa_port_is_cpu(port)) {
+ err = dsa_cpu_parse(port, index, dst, ds);
+ if (err)
+ return err;
+ }
}
- return err;
-}
-
-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;
+ pr_info("DSA: switch %d %d parsed\n", dst->tree, ds->index);
return 0;
}
-static int dsa_port_parse_dsa(struct dsa_port *dp)
+static int dsa_dst_parse(struct dsa_switch_tree *dst)
{
- dp->type = DSA_PORT_TYPE_DSA;
+ struct dsa_switch *ds;
+ u32 index;
+ int err;
- return 0;
-}
+ for (index = 0; index < DSA_MAX_SWITCHES; index++) {
+ ds = dst->ds[index];
+ if (!ds)
+ continue;
-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);
+ err = dsa_ds_parse(dst, ds);
+ if (err)
+ return err;
}
- 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");
+ if (!dst->master_netdev) {
+ pr_warn("Tree has no master device\n");
return -EINVAL;
}
+ pr_info("DSA: tree %d parsed\n", dst->tree);
+
+ return 0;
+}
+
+static int dsa_parse_ports_dn(struct device_node *ports, struct dsa_switch *ds)
+{
+ struct device_node *port;
+ int err;
+ u32 reg;
+
for_each_available_child_of_node(ports, port) {
err = of_property_read_u32(port, "reg", ®);
if (err)
- goto out_put_node;
+ return err;
- if (reg >= ds->num_ports) {
- err = -EINVAL;
- goto out_put_node;
- }
+ if (reg >= DSA_MAX_PORTS)
+ return -EINVAL;
- dp = &ds->ports[reg];
+ ds->ports[reg].dn = port;
- err = dsa_port_parse_of(dp, port);
- if (err)
- goto out_put_node;
+ /* Initialize enabled_port_mask now for ops->setup()
+ * to have access to a correct value, just like what
+ * net/dsa/dsa.c::dsa_switch_setup_one does.
+ */
+ if (!dsa_port_is_cpu(port))
+ ds->enabled_port_mask |= 1 << reg;
}
-out_put_node:
- of_node_put(ports);
+ return 0;
+}
+
+static int dsa_parse_member(struct device_node *np, u32 *tree, u32 *index)
+{
+ int err;
+
+ *tree = *index = 0;
+
+ err = of_property_read_u32_index(np, "dsa,member", 0, tree);
+ if (err) {
+ /* Does not exist, but it is optional */
+ if (err == -EINVAL)
+ return 0;
+ return err;
+ }
+
+ err = of_property_read_u32_index(np, "dsa,member", 1, index);
+ if (err)
+ return err;
+
+ if (*index >= DSA_MAX_SWITCHES)
+ return -EINVAL;
+
+ return 0;
+}
+
+static struct device_node *dsa_get_ports(struct dsa_switch *ds,
+ struct device_node *np)
+{
+ struct device_node *ports;
+
+ ports = of_get_child_by_name(np, "ports");
+ if (!ports) {
+ dev_err(ds->dev, "no ports child node found\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ return ports;
+}
+
+static int _dsa_register_switch(struct dsa_switch *ds, struct device_node *np)
+{
+ struct device_node *ports = dsa_get_ports(ds, np);
+ struct dsa_switch_tree *dst;
+ u32 tree, index;
+ int i, err;
+
+ err = dsa_parse_member(np, &tree, &index);
+ if (err)
+ return err;
+
+ if (IS_ERR(ports))
+ return PTR_ERR(ports);
+
+ err = dsa_parse_ports_dn(ports, ds);
+ if (err)
+ return err;
+
+ dst = dsa_get_dst(tree);
+ if (!dst) {
+ dst = dsa_add_dst(tree);
+ if (!dst)
+ return -ENOMEM;
+ }
+
+ if (dst->ds[index]) {
+ err = -EBUSY;
+ goto out;
+ }
+
+ ds->dst = dst;
+ ds->index = index;
+
+ /* Initialize the routing table */
+ for (i = 0; i < DSA_MAX_SWITCHES; ++i)
+ ds->rtable[i] = DSA_RTABLE_NONE;
+
+ dsa_dst_add_ds(dst, ds, index);
+
+ err = dsa_dst_complete(dst);
+ if (err < 0)
+ goto out_del_dst;
+
+ if (err == 1) {
+ /* Not all switches registered yet */
+ err = 0;
+ goto out;
+ }
+
+ if (dst->applied) {
+ pr_info("DSA: Disjoint trees?\n");
+ return -EINVAL;
+ }
+
+ err = dsa_dst_parse(dst);
+ if (err)
+ goto out_del_dst;
+
+ err = dsa_dst_apply(dst);
+ if (err) {
+ dsa_dst_unapply(dst);
+ goto out_del_dst;
+ }
+
+ dsa_put_dst(dst);
+ return 0;
+
+out_del_dst:
+ dsa_dst_del_ds(dst, ds, ds->index);
+out:
+ dsa_put_dst(dst);
+
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];
- if (ds->index >= DSA_MAX_SWITCHES)
- return -EINVAL;
-
- ds->dst = dsa_tree_touch(m[0]);
- if (!ds->dst)
- 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;
-
- 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 = &ds->ports[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)
-{
- 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;
-
- return dsa_switch_parse_ports(ds, cd);
-}
-
-static int dsa_switch_add(struct dsa_switch *ds)
-{
- struct dsa_switch_tree *dst = ds->dst;
-
- return dsa_tree_add_switch(dst, ds);
-}
-
-static int dsa_switch_probe(struct dsa_switch *ds)
-{
- struct dsa_chip_data *pdata = ds->dev->platform_data;
- struct device_node *np = ds->dev->of_node;
- int err;
-
- 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;
-
- return dsa_switch_add(ds);
-}
-
-struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n)
-{
- struct dsa_switch *ds;
- int i;
-
- ds = devm_kzalloc(dev, struct_size(ds, ports, n), GFP_KERNEL);
- if (!ds)
- return NULL;
-
- ds->dev = dev;
- ds->num_ports = n;
-
- for (i = 0; i < ds->num_ports; ++i) {
- ds->ports[i].index = i;
- ds->ports[i].ds = ds;
- }
-
- return ds;
-}
-EXPORT_SYMBOL_GPL(dsa_switch_alloc);
-
-int dsa_register_switch(struct dsa_switch *ds)
+int dsa_register_switch(struct dsa_switch *ds, struct device_node *np)
{
int err;
mutex_lock(&dsa2_mutex);
- err = dsa_switch_probe(ds);
- dsa_tree_put(ds->dst);
+ err = _dsa_register_switch(ds, np);
mutex_unlock(&dsa2_mutex);
return err;
}
EXPORT_SYMBOL_GPL(dsa_register_switch);
-static void dsa_switch_remove(struct dsa_switch *ds)
+static void _dsa_unregister_switch(struct dsa_switch *ds)
{
struct dsa_switch_tree *dst = ds->dst;
- unsigned int index = ds->index;
- dsa_tree_remove_switch(dst, index);
+ dsa_dst_unapply(dst);
+
+ dsa_dst_del_ds(dst, ds, ds->index);
}
void dsa_unregister_switch(struct dsa_switch *ds)
{
mutex_lock(&dsa2_mutex);
- dsa_switch_remove(ds);
+ _dsa_unregister_switch(ds);
mutex_unlock(&dsa2_mutex);
}
EXPORT_SYMBOL_GPL(dsa_unregister_switch);
