ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/net/switchdev/Kconfig b/marvell/linux/net/switchdev/Kconfig
new file mode 100644
index 0000000..50f21a6
--- /dev/null
+++ b/marvell/linux/net/switchdev/Kconfig
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Configuration for Switch device support
+#
+
+config NET_SWITCHDEV
+ bool "Switch (and switch-ish) device support"
+ depends on INET
+ ---help---
+ This module provides glue between core networking code and device
+ drivers in order to support hardware switch chips in very generic
+ meaning of the word "switch". This include devices supporting L2/L3 but
+ also various flow offloading chips, including switches embedded into
+ SR-IOV NICs.
diff --git a/marvell/linux/net/switchdev/Makefile b/marvell/linux/net/switchdev/Makefile
new file mode 100644
index 0000000..bd69a31
--- /dev/null
+++ b/marvell/linux/net/switchdev/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Switch device API
+#
+
+obj-$(CONFIG_NET_SWITCHDEV) += switchdev.o
diff --git a/marvell/linux/net/switchdev/switchdev.c b/marvell/linux/net/switchdev/switchdev.c
new file mode 100644
index 0000000..9677355
--- /dev/null
+++ b/marvell/linux/net/switchdev/switchdev.c
@@ -0,0 +1,615 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * net/switchdev/switchdev.c - Switch device API
+ * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/if_vlan.h>
+#include <linux/rtnetlink.h>
+#include <net/switchdev.h>
+
+static LIST_HEAD(deferred);
+static DEFINE_SPINLOCK(deferred_lock);
+
+typedef void switchdev_deferred_func_t(struct net_device *dev,
+ const void *data);
+
+struct switchdev_deferred_item {
+ struct list_head list;
+ struct net_device *dev;
+ switchdev_deferred_func_t *func;
+ unsigned long data[0];
+};
+
+static struct switchdev_deferred_item *switchdev_deferred_dequeue(void)
+{
+ struct switchdev_deferred_item *dfitem;
+
+ spin_lock_bh(&deferred_lock);
+ if (list_empty(&deferred)) {
+ dfitem = NULL;
+ goto unlock;
+ }
+ dfitem = list_first_entry(&deferred,
+ struct switchdev_deferred_item, list);
+ list_del(&dfitem->list);
+unlock:
+ spin_unlock_bh(&deferred_lock);
+ return dfitem;
+}
+
+/**
+ * switchdev_deferred_process - Process ops in deferred queue
+ *
+ * Called to flush the ops currently queued in deferred ops queue.
+ * rtnl_lock must be held.
+ */
+void switchdev_deferred_process(void)
+{
+ struct switchdev_deferred_item *dfitem;
+
+ ASSERT_RTNL();
+
+ while ((dfitem = switchdev_deferred_dequeue())) {
+ dfitem->func(dfitem->dev, dfitem->data);
+ dev_put(dfitem->dev);
+ kfree(dfitem);
+ }
+}
+EXPORT_SYMBOL_GPL(switchdev_deferred_process);
+
+static void switchdev_deferred_process_work(struct work_struct *work)
+{
+ rtnl_lock();
+ switchdev_deferred_process();
+ rtnl_unlock();
+}
+
+static DECLARE_WORK(deferred_process_work, switchdev_deferred_process_work);
+
+static int switchdev_deferred_enqueue(struct net_device *dev,
+ const void *data, size_t data_len,
+ switchdev_deferred_func_t *func)
+{
+ struct switchdev_deferred_item *dfitem;
+
+ dfitem = kmalloc(sizeof(*dfitem) + data_len, GFP_ATOMIC);
+ if (!dfitem)
+ return -ENOMEM;
+ dfitem->dev = dev;
+ dfitem->func = func;
+ memcpy(dfitem->data, data, data_len);
+ dev_hold(dev);
+ spin_lock_bh(&deferred_lock);
+ list_add_tail(&dfitem->list, &deferred);
+ spin_unlock_bh(&deferred_lock);
+ schedule_work(&deferred_process_work);
+ return 0;
+}
+
+static int switchdev_port_attr_notify(enum switchdev_notifier_type nt,
+ struct net_device *dev,
+ const struct switchdev_attr *attr,
+ struct switchdev_trans *trans)
+{
+ int err;
+ int rc;
+
+ struct switchdev_notifier_port_attr_info attr_info = {
+ .attr = attr,
+ .trans = trans,
+ .handled = false,
+ };
+
+ rc = call_switchdev_blocking_notifiers(nt, dev,
+ &attr_info.info, NULL);
+ err = notifier_to_errno(rc);
+ if (err) {
+ WARN_ON(!attr_info.handled);
+ return err;
+ }
+
+ if (!attr_info.handled)
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+static int switchdev_port_attr_set_now(struct net_device *dev,
+ const struct switchdev_attr *attr)
+{
+ struct switchdev_trans trans;
+ int err;
+
+ /* Phase I: prepare for attr set. Driver/device should fail
+ * here if there are going to be issues in the commit phase,
+ * such as lack of resources or support. The driver/device
+ * should reserve resources needed for the commit phase here,
+ * but should not commit the attr.
+ */
+
+ trans.ph_prepare = true;
+ err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
+ &trans);
+ if (err)
+ return err;
+
+ /* Phase II: commit attr set. This cannot fail as a fault
+ * of driver/device. If it does, it's a bug in the driver/device
+ * because the driver said everythings was OK in phase I.
+ */
+
+ trans.ph_prepare = false;
+ err = switchdev_port_attr_notify(SWITCHDEV_PORT_ATTR_SET, dev, attr,
+ &trans);
+ WARN(err, "%s: Commit of attribute (id=%d) failed.\n",
+ dev->name, attr->id);
+
+ return err;
+}
+
+static void switchdev_port_attr_set_deferred(struct net_device *dev,
+ const void *data)
+{
+ const struct switchdev_attr *attr = data;
+ int err;
+
+ err = switchdev_port_attr_set_now(dev, attr);
+ if (err && err != -EOPNOTSUPP)
+ netdev_err(dev, "failed (err=%d) to set attribute (id=%d)\n",
+ err, attr->id);
+ if (attr->complete)
+ attr->complete(dev, err, attr->complete_priv);
+}
+
+static int switchdev_port_attr_set_defer(struct net_device *dev,
+ const struct switchdev_attr *attr)
+{
+ return switchdev_deferred_enqueue(dev, attr, sizeof(*attr),
+ switchdev_port_attr_set_deferred);
+}
+
+/**
+ * switchdev_port_attr_set - Set port attribute
+ *
+ * @dev: port device
+ * @attr: attribute to set
+ *
+ * Use a 2-phase prepare-commit transaction model to ensure
+ * system is not left in a partially updated state due to
+ * failure from driver/device.
+ *
+ * rtnl_lock must be held and must not be in atomic section,
+ * in case SWITCHDEV_F_DEFER flag is not set.
+ */
+int switchdev_port_attr_set(struct net_device *dev,
+ const struct switchdev_attr *attr)
+{
+ if (attr->flags & SWITCHDEV_F_DEFER)
+ return switchdev_port_attr_set_defer(dev, attr);
+ ASSERT_RTNL();
+ return switchdev_port_attr_set_now(dev, attr);
+}
+EXPORT_SYMBOL_GPL(switchdev_port_attr_set);
+
+static size_t switchdev_obj_size(const struct switchdev_obj *obj)
+{
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ return sizeof(struct switchdev_obj_port_vlan);
+ case SWITCHDEV_OBJ_ID_PORT_MDB:
+ return sizeof(struct switchdev_obj_port_mdb);
+ case SWITCHDEV_OBJ_ID_HOST_MDB:
+ return sizeof(struct switchdev_obj_port_mdb);
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static int switchdev_port_obj_notify(enum switchdev_notifier_type nt,
+ struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct switchdev_trans *trans,
+ struct netlink_ext_ack *extack)
+{
+ int rc;
+ int err;
+
+ struct switchdev_notifier_port_obj_info obj_info = {
+ .obj = obj,
+ .trans = trans,
+ .handled = false,
+ };
+
+ rc = call_switchdev_blocking_notifiers(nt, dev, &obj_info.info, extack);
+ err = notifier_to_errno(rc);
+ if (err) {
+ WARN_ON(!obj_info.handled);
+ return err;
+ }
+ if (!obj_info.handled)
+ return -EOPNOTSUPP;
+ return 0;
+}
+
+static int switchdev_port_obj_add_now(struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct netlink_ext_ack *extack)
+{
+ struct switchdev_trans trans;
+ int err;
+
+ ASSERT_RTNL();
+
+ /* Phase I: prepare for obj add. Driver/device should fail
+ * here if there are going to be issues in the commit phase,
+ * such as lack of resources or support. The driver/device
+ * should reserve resources needed for the commit phase here,
+ * but should not commit the obj.
+ */
+
+ trans.ph_prepare = true;
+ err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD,
+ dev, obj, &trans, extack);
+ if (err)
+ return err;
+
+ /* Phase II: commit obj add. This cannot fail as a fault
+ * of driver/device. If it does, it's a bug in the driver/device
+ * because the driver said everythings was OK in phase I.
+ */
+
+ trans.ph_prepare = false;
+ err = switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_ADD,
+ dev, obj, &trans, extack);
+ WARN(err, "%s: Commit of object (id=%d) failed.\n", dev->name, obj->id);
+
+ return err;
+}
+
+static void switchdev_port_obj_add_deferred(struct net_device *dev,
+ const void *data)
+{
+ const struct switchdev_obj *obj = data;
+ int err;
+
+ err = switchdev_port_obj_add_now(dev, obj, NULL);
+ if (err && err != -EOPNOTSUPP)
+ netdev_err(dev, "failed (err=%d) to add object (id=%d)\n",
+ err, obj->id);
+ if (obj->complete)
+ obj->complete(dev, err, obj->complete_priv);
+}
+
+static int switchdev_port_obj_add_defer(struct net_device *dev,
+ const struct switchdev_obj *obj)
+{
+ return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
+ switchdev_port_obj_add_deferred);
+}
+
+/**
+ * switchdev_port_obj_add - Add port object
+ *
+ * @dev: port device
+ * @id: object ID
+ * @obj: object to add
+ *
+ * Use a 2-phase prepare-commit transaction model to ensure
+ * system is not left in a partially updated state due to
+ * failure from driver/device.
+ *
+ * rtnl_lock must be held and must not be in atomic section,
+ * in case SWITCHDEV_F_DEFER flag is not set.
+ */
+int switchdev_port_obj_add(struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct netlink_ext_ack *extack)
+{
+ if (obj->flags & SWITCHDEV_F_DEFER)
+ return switchdev_port_obj_add_defer(dev, obj);
+ ASSERT_RTNL();
+ return switchdev_port_obj_add_now(dev, obj, extack);
+}
+EXPORT_SYMBOL_GPL(switchdev_port_obj_add);
+
+static int switchdev_port_obj_del_now(struct net_device *dev,
+ const struct switchdev_obj *obj)
+{
+ return switchdev_port_obj_notify(SWITCHDEV_PORT_OBJ_DEL,
+ dev, obj, NULL, NULL);
+}
+
+static void switchdev_port_obj_del_deferred(struct net_device *dev,
+ const void *data)
+{
+ const struct switchdev_obj *obj = data;
+ int err;
+
+ err = switchdev_port_obj_del_now(dev, obj);
+ if (err && err != -EOPNOTSUPP)
+ netdev_err(dev, "failed (err=%d) to del object (id=%d)\n",
+ err, obj->id);
+ if (obj->complete)
+ obj->complete(dev, err, obj->complete_priv);
+}
+
+static int switchdev_port_obj_del_defer(struct net_device *dev,
+ const struct switchdev_obj *obj)
+{
+ return switchdev_deferred_enqueue(dev, obj, switchdev_obj_size(obj),
+ switchdev_port_obj_del_deferred);
+}
+
+/**
+ * switchdev_port_obj_del - Delete port object
+ *
+ * @dev: port device
+ * @id: object ID
+ * @obj: object to delete
+ *
+ * rtnl_lock must be held and must not be in atomic section,
+ * in case SWITCHDEV_F_DEFER flag is not set.
+ */
+int switchdev_port_obj_del(struct net_device *dev,
+ const struct switchdev_obj *obj)
+{
+ if (obj->flags & SWITCHDEV_F_DEFER)
+ return switchdev_port_obj_del_defer(dev, obj);
+ ASSERT_RTNL();
+ return switchdev_port_obj_del_now(dev, obj);
+}
+EXPORT_SYMBOL_GPL(switchdev_port_obj_del);
+
+static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain);
+static BLOCKING_NOTIFIER_HEAD(switchdev_blocking_notif_chain);
+
+/**
+ * register_switchdev_notifier - Register notifier
+ * @nb: notifier_block
+ *
+ * Register switch device notifier.
+ */
+int register_switchdev_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&switchdev_notif_chain, nb);
+}
+EXPORT_SYMBOL_GPL(register_switchdev_notifier);
+
+/**
+ * unregister_switchdev_notifier - Unregister notifier
+ * @nb: notifier_block
+ *
+ * Unregister switch device notifier.
+ */
+int unregister_switchdev_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&switchdev_notif_chain, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_switchdev_notifier);
+
+/**
+ * call_switchdev_notifiers - Call notifiers
+ * @val: value passed unmodified to notifier function
+ * @dev: port device
+ * @info: notifier information data
+ *
+ * Call all network notifier blocks.
+ */
+int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
+ struct switchdev_notifier_info *info,
+ struct netlink_ext_ack *extack)
+{
+ info->dev = dev;
+ info->extack = extack;
+ return atomic_notifier_call_chain(&switchdev_notif_chain, val, info);
+}
+EXPORT_SYMBOL_GPL(call_switchdev_notifiers);
+
+int register_switchdev_blocking_notifier(struct notifier_block *nb)
+{
+ struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain;
+
+ return blocking_notifier_chain_register(chain, nb);
+}
+EXPORT_SYMBOL_GPL(register_switchdev_blocking_notifier);
+
+int unregister_switchdev_blocking_notifier(struct notifier_block *nb)
+{
+ struct blocking_notifier_head *chain = &switchdev_blocking_notif_chain;
+
+ return blocking_notifier_chain_unregister(chain, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_switchdev_blocking_notifier);
+
+int call_switchdev_blocking_notifiers(unsigned long val, struct net_device *dev,
+ struct switchdev_notifier_info *info,
+ struct netlink_ext_ack *extack)
+{
+ info->dev = dev;
+ info->extack = extack;
+ return blocking_notifier_call_chain(&switchdev_blocking_notif_chain,
+ val, info);
+}
+EXPORT_SYMBOL_GPL(call_switchdev_blocking_notifiers);
+
+static int __switchdev_handle_port_obj_add(struct net_device *dev,
+ struct switchdev_notifier_port_obj_info *port_obj_info,
+ bool (*check_cb)(const struct net_device *dev),
+ int (*add_cb)(struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct switchdev_trans *trans,
+ struct netlink_ext_ack *extack))
+{
+ struct netlink_ext_ack *extack;
+ struct net_device *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
+
+ extack = switchdev_notifier_info_to_extack(&port_obj_info->info);
+
+ if (check_cb(dev)) {
+ err = add_cb(dev, port_obj_info->obj, port_obj_info->trans,
+ extack);
+ if (err != -EOPNOTSUPP)
+ port_obj_info->handled = true;
+ return err;
+ }
+
+ /* Switch ports might be stacked under e.g. a LAG. Ignore the
+ * unsupported devices, another driver might be able to handle them. But
+ * propagate to the callers any hard errors.
+ *
+ * If the driver does its own bookkeeping of stacked ports, it's not
+ * necessary to go through this helper.
+ */
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ if (netif_is_bridge_master(lower_dev))
+ continue;
+
+ err = __switchdev_handle_port_obj_add(lower_dev, port_obj_info,
+ check_cb, add_cb);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ return err;
+}
+
+int switchdev_handle_port_obj_add(struct net_device *dev,
+ struct switchdev_notifier_port_obj_info *port_obj_info,
+ bool (*check_cb)(const struct net_device *dev),
+ int (*add_cb)(struct net_device *dev,
+ const struct switchdev_obj *obj,
+ struct switchdev_trans *trans,
+ struct netlink_ext_ack *extack))
+{
+ int err;
+
+ err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb,
+ add_cb);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add);
+
+static int __switchdev_handle_port_obj_del(struct net_device *dev,
+ struct switchdev_notifier_port_obj_info *port_obj_info,
+ bool (*check_cb)(const struct net_device *dev),
+ int (*del_cb)(struct net_device *dev,
+ const struct switchdev_obj *obj))
+{
+ struct net_device *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
+
+ if (check_cb(dev)) {
+ err = del_cb(dev, port_obj_info->obj);
+ if (err != -EOPNOTSUPP)
+ port_obj_info->handled = true;
+ return err;
+ }
+
+ /* Switch ports might be stacked under e.g. a LAG. Ignore the
+ * unsupported devices, another driver might be able to handle them. But
+ * propagate to the callers any hard errors.
+ *
+ * If the driver does its own bookkeeping of stacked ports, it's not
+ * necessary to go through this helper.
+ */
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ if (netif_is_bridge_master(lower_dev))
+ continue;
+
+ err = __switchdev_handle_port_obj_del(lower_dev, port_obj_info,
+ check_cb, del_cb);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ return err;
+}
+
+int switchdev_handle_port_obj_del(struct net_device *dev,
+ struct switchdev_notifier_port_obj_info *port_obj_info,
+ bool (*check_cb)(const struct net_device *dev),
+ int (*del_cb)(struct net_device *dev,
+ const struct switchdev_obj *obj))
+{
+ int err;
+
+ err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb,
+ del_cb);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del);
+
+static int __switchdev_handle_port_attr_set(struct net_device *dev,
+ struct switchdev_notifier_port_attr_info *port_attr_info,
+ bool (*check_cb)(const struct net_device *dev),
+ int (*set_cb)(struct net_device *dev,
+ const struct switchdev_attr *attr,
+ struct switchdev_trans *trans))
+{
+ struct net_device *lower_dev;
+ struct list_head *iter;
+ int err = -EOPNOTSUPP;
+
+ if (check_cb(dev)) {
+ err = set_cb(dev, port_attr_info->attr, port_attr_info->trans);
+ if (err != -EOPNOTSUPP)
+ port_attr_info->handled = true;
+ return err;
+ }
+
+ /* Switch ports might be stacked under e.g. a LAG. Ignore the
+ * unsupported devices, another driver might be able to handle them. But
+ * propagate to the callers any hard errors.
+ *
+ * If the driver does its own bookkeeping of stacked ports, it's not
+ * necessary to go through this helper.
+ */
+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
+ if (netif_is_bridge_master(lower_dev))
+ continue;
+
+ err = __switchdev_handle_port_attr_set(lower_dev, port_attr_info,
+ check_cb, set_cb);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ return err;
+}
+
+int switchdev_handle_port_attr_set(struct net_device *dev,
+ struct switchdev_notifier_port_attr_info *port_attr_info,
+ bool (*check_cb)(const struct net_device *dev),
+ int (*set_cb)(struct net_device *dev,
+ const struct switchdev_attr *attr,
+ struct switchdev_trans *trans))
+{
+ int err;
+
+ err = __switchdev_handle_port_attr_set(dev, port_attr_info, check_cb,
+ set_cb);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_port_attr_set);