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478 lines
12 KiB
478 lines
12 KiB
/*
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* include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
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* Copyright (c) 2008-2009 Marvell Semiconductor
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __LINUX_NET_DSA_H
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#define __LINUX_NET_DSA_H
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#include <linux/if.h>
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#include <linux/if_ether.h>
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#include <linux/list.h>
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#include <linux/notifier.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include <linux/of.h>
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#include <linux/ethtool.h>
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#include <net/devlink.h>
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#include <net/switchdev.h>
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struct tc_action;
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struct phy_device;
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struct fixed_phy_status;
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enum dsa_tag_protocol {
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DSA_TAG_PROTO_NONE = 0,
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DSA_TAG_PROTO_BRCM,
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DSA_TAG_PROTO_DSA,
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DSA_TAG_PROTO_EDSA,
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DSA_TAG_PROTO_KSZ,
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DSA_TAG_PROTO_LAN9303,
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DSA_TAG_PROTO_MTK,
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DSA_TAG_PROTO_QCA,
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DSA_TAG_PROTO_TRAILER,
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DSA_TAG_LAST, /* MUST BE LAST */
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};
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#define DSA_MAX_SWITCHES 4
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#define DSA_MAX_PORTS 12
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#define DSA_RTABLE_NONE -1
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struct dsa_chip_data {
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/*
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* How to access the switch configuration registers.
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*/
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struct device *host_dev;
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int sw_addr;
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/*
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* Reference to network devices
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*/
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struct device *netdev[DSA_MAX_PORTS];
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/* set to size of eeprom if supported by the switch */
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int eeprom_len;
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/* Device tree node pointer for this specific switch chip
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* used during switch setup in case additional properties
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* and resources needs to be used
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*/
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struct device_node *of_node;
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/*
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* The names of the switch's ports. Use "cpu" to
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* designate the switch port that the cpu is connected to,
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* "dsa" to indicate that this port is a DSA link to
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* another switch, NULL to indicate the port is unused,
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* or any other string to indicate this is a physical port.
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*/
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char *port_names[DSA_MAX_PORTS];
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struct device_node *port_dn[DSA_MAX_PORTS];
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/*
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* An array of which element [a] indicates which port on this
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* switch should be used to send packets to that are destined
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* for switch a. Can be NULL if there is only one switch chip.
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*/
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s8 rtable[DSA_MAX_SWITCHES];
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};
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struct dsa_platform_data {
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/*
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* Reference to a Linux network interface that connects
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* to the root switch chip of the tree.
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*/
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struct device *netdev;
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struct net_device *of_netdev;
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/*
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* Info structs describing each of the switch chips
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* connected via this network interface.
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*/
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int nr_chips;
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struct dsa_chip_data *chip;
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};
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struct packet_type;
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struct dsa_device_ops {
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struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
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struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *pt);
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int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
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int *offset);
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};
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struct dsa_switch_tree {
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struct list_head list;
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/* Notifier chain for switch-wide events */
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struct raw_notifier_head nh;
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/* Tree identifier */
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u32 tree;
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/* Number of switches attached to this tree */
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struct kref refcount;
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/* Has this tree been applied to the hardware? */
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bool applied;
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/*
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* Configuration data for the platform device that owns
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* this dsa switch tree instance.
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*/
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struct dsa_platform_data *pd;
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/* Copy of tag_ops->rcv for faster access in hot path */
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struct sk_buff * (*rcv)(struct sk_buff *skb,
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struct net_device *dev,
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struct packet_type *pt);
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/*
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* The switch port to which the CPU is attached.
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*/
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struct dsa_port *cpu_dp;
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/*
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* Data for the individual switch chips.
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*/
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struct dsa_switch *ds[DSA_MAX_SWITCHES];
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/*
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* Tagging protocol operations for adding and removing an
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* encapsulation tag.
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*/
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const struct dsa_device_ops *tag_ops;
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};
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/* TC matchall action types, only mirroring for now */
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enum dsa_port_mall_action_type {
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DSA_PORT_MALL_MIRROR,
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};
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/* TC mirroring entry */
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struct dsa_mall_mirror_tc_entry {
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u8 to_local_port;
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bool ingress;
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};
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/* TC matchall entry */
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struct dsa_mall_tc_entry {
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struct list_head list;
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unsigned long cookie;
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enum dsa_port_mall_action_type type;
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union {
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struct dsa_mall_mirror_tc_entry mirror;
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};
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};
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struct dsa_port {
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struct dsa_switch *ds;
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unsigned int index;
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const char *name;
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struct dsa_port *cpu_dp;
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struct net_device *netdev;
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struct device_node *dn;
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unsigned int ageing_time;
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u8 stp_state;
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struct net_device *bridge_dev;
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struct devlink_port devlink_port;
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/*
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* Original copy of the master netdev ethtool_ops
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*/
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struct ethtool_ops ethtool_ops;
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const struct ethtool_ops *orig_ethtool_ops;
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};
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struct dsa_switch {
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struct device *dev;
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/*
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* Parent switch tree, and switch index.
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*/
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struct dsa_switch_tree *dst;
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int index;
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/* Listener for switch fabric events */
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struct notifier_block nb;
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/*
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* Give the switch driver somewhere to hang its private data
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* structure.
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*/
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void *priv;
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/*
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* Configuration data for this switch.
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*/
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struct dsa_chip_data *cd;
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/*
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* The switch operations.
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*/
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const struct dsa_switch_ops *ops;
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/*
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* An array of which element [a] indicates which port on this
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* switch should be used to send packets to that are destined
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* for switch a. Can be NULL if there is only one switch chip.
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*/
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s8 rtable[DSA_MAX_SWITCHES];
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/*
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* Slave mii_bus and devices for the individual ports.
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*/
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u32 dsa_port_mask;
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u32 cpu_port_mask;
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u32 enabled_port_mask;
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u32 phys_mii_mask;
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struct mii_bus *slave_mii_bus;
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/* Ageing Time limits in msecs */
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unsigned int ageing_time_min;
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unsigned int ageing_time_max;
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/* devlink used to represent this switch device */
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struct devlink *devlink;
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/* Number of switch port queues */
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unsigned int num_tx_queues;
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/* Dynamically allocated ports, keep last */
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size_t num_ports;
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struct dsa_port ports[];
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};
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static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
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{
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return !!(ds->cpu_port_mask & (1 << p));
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}
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static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
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{
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return !!((ds->dsa_port_mask) & (1 << p));
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}
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static inline bool dsa_is_normal_port(struct dsa_switch *ds, int p)
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{
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return !dsa_is_cpu_port(ds, p) && !dsa_is_dsa_port(ds, p);
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}
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static inline u8 dsa_upstream_port(struct dsa_switch *ds)
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{
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struct dsa_switch_tree *dst = ds->dst;
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/*
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* If this is the root switch (i.e. the switch that connects
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* to the CPU), return the cpu port number on this switch.
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* Else return the (DSA) port number that connects to the
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* switch that is one hop closer to the cpu.
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*/
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if (dst->cpu_dp->ds == ds)
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return dst->cpu_dp->index;
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else
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return ds->rtable[dst->cpu_dp->ds->index];
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}
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typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
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bool is_static, void *data);
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struct dsa_switch_ops {
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/*
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* Legacy probing.
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*/
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const char *(*probe)(struct device *dsa_dev,
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struct device *host_dev, int sw_addr,
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void **priv);
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enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds);
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int (*setup)(struct dsa_switch *ds);
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int (*set_addr)(struct dsa_switch *ds, u8 *addr);
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u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
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/*
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* Access to the switch's PHY registers.
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*/
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int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
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int (*phy_write)(struct dsa_switch *ds, int port,
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int regnum, u16 val);
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/*
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* Link state adjustment (called from libphy)
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*/
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void (*adjust_link)(struct dsa_switch *ds, int port,
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struct phy_device *phydev);
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void (*fixed_link_update)(struct dsa_switch *ds, int port,
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struct fixed_phy_status *st);
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/*
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* ethtool hardware statistics.
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*/
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void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
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void (*get_ethtool_stats)(struct dsa_switch *ds,
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int port, uint64_t *data);
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int (*get_sset_count)(struct dsa_switch *ds);
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/*
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* ethtool Wake-on-LAN
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*/
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void (*get_wol)(struct dsa_switch *ds, int port,
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struct ethtool_wolinfo *w);
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int (*set_wol)(struct dsa_switch *ds, int port,
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struct ethtool_wolinfo *w);
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/*
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* Suspend and resume
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*/
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int (*suspend)(struct dsa_switch *ds);
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int (*resume)(struct dsa_switch *ds);
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/*
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* Port enable/disable
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*/
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int (*port_enable)(struct dsa_switch *ds, int port,
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struct phy_device *phy);
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void (*port_disable)(struct dsa_switch *ds, int port,
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struct phy_device *phy);
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/*
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* Port's MAC EEE settings
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*/
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int (*set_mac_eee)(struct dsa_switch *ds, int port,
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struct ethtool_eee *e);
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int (*get_mac_eee)(struct dsa_switch *ds, int port,
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struct ethtool_eee *e);
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/* EEPROM access */
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int (*get_eeprom_len)(struct dsa_switch *ds);
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int (*get_eeprom)(struct dsa_switch *ds,
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struct ethtool_eeprom *eeprom, u8 *data);
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int (*set_eeprom)(struct dsa_switch *ds,
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struct ethtool_eeprom *eeprom, u8 *data);
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/*
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* Register access.
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*/
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int (*get_regs_len)(struct dsa_switch *ds, int port);
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void (*get_regs)(struct dsa_switch *ds, int port,
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struct ethtool_regs *regs, void *p);
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/*
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* Bridge integration
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*/
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int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
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int (*port_bridge_join)(struct dsa_switch *ds, int port,
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struct net_device *bridge);
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void (*port_bridge_leave)(struct dsa_switch *ds, int port,
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struct net_device *bridge);
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void (*port_stp_state_set)(struct dsa_switch *ds, int port,
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u8 state);
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void (*port_fast_age)(struct dsa_switch *ds, int port);
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/*
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* VLAN support
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*/
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int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
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bool vlan_filtering);
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int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_vlan *vlan,
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struct switchdev_trans *trans);
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void (*port_vlan_add)(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_vlan *vlan,
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struct switchdev_trans *trans);
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int (*port_vlan_del)(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_vlan *vlan);
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/*
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* Forwarding database
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*/
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int (*port_fdb_add)(struct dsa_switch *ds, int port,
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const unsigned char *addr, u16 vid);
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int (*port_fdb_del)(struct dsa_switch *ds, int port,
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const unsigned char *addr, u16 vid);
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int (*port_fdb_dump)(struct dsa_switch *ds, int port,
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dsa_fdb_dump_cb_t *cb, void *data);
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/*
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* Multicast database
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*/
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int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_mdb *mdb,
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struct switchdev_trans *trans);
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void (*port_mdb_add)(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_mdb *mdb,
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struct switchdev_trans *trans);
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int (*port_mdb_del)(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_mdb *mdb);
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/*
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* RXNFC
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*/
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int (*get_rxnfc)(struct dsa_switch *ds, int port,
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struct ethtool_rxnfc *nfc, u32 *rule_locs);
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int (*set_rxnfc)(struct dsa_switch *ds, int port,
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struct ethtool_rxnfc *nfc);
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/*
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* TC integration
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*/
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int (*port_mirror_add)(struct dsa_switch *ds, int port,
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struct dsa_mall_mirror_tc_entry *mirror,
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bool ingress);
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void (*port_mirror_del)(struct dsa_switch *ds, int port,
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struct dsa_mall_mirror_tc_entry *mirror);
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/*
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* Cross-chip operations
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*/
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int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
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int port, struct net_device *br);
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void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
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int port, struct net_device *br);
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};
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struct dsa_switch_driver {
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struct list_head list;
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const struct dsa_switch_ops *ops;
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};
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/* Legacy driver registration */
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void register_switch_driver(struct dsa_switch_driver *type);
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void unregister_switch_driver(struct dsa_switch_driver *type);
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struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
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struct net_device *dsa_dev_to_net_device(struct device *dev);
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/* Keep inline for faster access in hot path */
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static inline bool netdev_uses_dsa(struct net_device *dev)
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{
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#if IS_ENABLED(CONFIG_NET_DSA)
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return dev->dsa_ptr && dev->dsa_ptr->rcv;
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#endif
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return false;
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}
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struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
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void dsa_unregister_switch(struct dsa_switch *ds);
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int dsa_register_switch(struct dsa_switch *ds);
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#ifdef CONFIG_PM_SLEEP
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int dsa_switch_suspend(struct dsa_switch *ds);
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int dsa_switch_resume(struct dsa_switch *ds);
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#else
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static inline int dsa_switch_suspend(struct dsa_switch *ds)
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{
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return 0;
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}
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static inline int dsa_switch_resume(struct dsa_switch *ds)
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{
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return 0;
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}
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#endif /* CONFIG_PM_SLEEP */
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#endif
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