1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
4  * Copyright (c) 2008-2009 Marvell Semiconductor
20 #include <linux/platform_data/dsa.h>
79 	/* Used to determine which traffic should match the DSA filter in
88 	 * address, in which case the DSA master would drop packets on ingress
97  * DSA layer on top of the DSA CPU/management net_device instance. This is
106 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
116 	u8 priv[48 - sizeof(struct dsa_skb_cb)];
119 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
122 	((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
127 	/* Notifier chain for switch-wide events */
141 	 * this dsa switch tree instance.
148 	/* List of DSA links composing the routing table */
225 	 * Give the switch driver somewhere to hang its per-port private data
243 /* TODO: ideally DSA ports would have a single dp->link_dp member,
244  * and no dst->rtable nor this struct dsa_link would be needed,
301 	 * settings on ports if not hardware-supported
314 	 * @untag_bridge_pvid will force the DSA receive path to pop the bridge's
321 	 * should be retrieved from here and not from the per-port settings.
341 	struct dsa_switch_tree *dst = ds->dst;  in dsa_to_port()
344 	list_for_each_entry(dp, &dst->ports, list)  in dsa_to_port()
345 		if (dp->ds == ds && dp->index == p)  in dsa_to_port()
353 	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;  in dsa_is_unused_port()
358 	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;  in dsa_is_cpu_port()
363 	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;  in dsa_is_dsa_port()
368 	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;  in dsa_is_user_port()
376 	for (p = 0; p < ds->num_ports; p++)  in dsa_user_ports()
386 	struct dsa_switch_tree *dst = ds->dst;  in dsa_routing_port()
389 	list_for_each_entry(dl, &dst->rtable, list)  in dsa_routing_port()
390 		if (dl->dp->ds == ds && dl->link_dp->ds->index == device)  in dsa_routing_port()
391 			return dl->dp->index;  in dsa_routing_port()
393 	return ds->num_ports;  in dsa_routing_port()
400 	if (device == ds->index)  in dsa_towards_port()
410 	const struct dsa_port *cpu_dp = dp->cpu_dp;  in dsa_upstream_port()
415 	return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);  in dsa_upstream_port()
420 	const struct dsa_switch *ds = dp->ds;  in dsa_port_is_vlan_filtering()
422 	if (ds->vlan_filtering_is_global)  in dsa_port_is_vlan_filtering()
423 		return ds->vlan_filtering;  in dsa_port_is_vlan_filtering()
425 		return dp->vlan_filtering;  in dsa_port_is_vlan_filtering()
489 	 * ethtool Wake-on-LAN
611 	 * Cross-chip operations
644 	 * If the switch needs to account for the DSA tag on the CPU port, this
702 	return dl_priv->ds;  in dsa_devlink_to_ds()
708 	struct devlink *dl = port->devlink;  in dsa_devlink_port_to_ds()
711 	return dl_priv->ds;  in dsa_devlink_port_to_ds()
716 	return port->index;  in dsa_devlink_port_to_port()
730 	return dev->dsa_ptr && dev->dsa_ptr->rcv;  in netdev_uses_dsa()
739 	return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);  in dsa_can_decode()
744 /* All DSA tags that push the EtherType to the right (basically all except tail
749  *  - offset: the (B - A) difference between:
751  *    B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
756  *  - proto: the value of the real EtherType.
762 	const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;  in dsa_tag_generic_flow_dissect()
763 	int tag_len = ops->overhead;  in dsa_tag_generic_flow_dissect()
766 	*proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];  in dsa_tag_generic_flow_dissect()
773 	int err = -EOPNOTSUPP;  in __dsa_netdevice_ops_check()
775 	if (!dev->dsa_ptr)  in __dsa_netdevice_ops_check()
778 	if (!dev->dsa_ptr->netdev_ops)  in __dsa_netdevice_ops_check()
794 	ops = dev->dsa_ptr->netdev_ops;  in dsa_ndo_do_ioctl()
796 	return ops->ndo_do_ioctl(dev, ifr, cmd);  in dsa_ndo_do_ioctl()
802 	return -EOPNOTSUPP;  in dsa_ndo_do_ioctl()
842 	return info->dev;  in dsa_notifier_info_to_dev()
868 /* Broadcom tag specific helpers to insert and extract queue/port number */
908  * module_dsa_tag_drivers() - Helper macro for registering DSA tag
912  * Helper macro for DSA tag drivers which do not do anything special
930  * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
934  * Helper macro for DSA tag drivers which do not do anything special