261 lines
6.1 KiB
C
261 lines
6.1 KiB
C
/*
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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_ether.h>
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#include <linux/list.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/phy.h>
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#include <linux/phy_fixed.h>
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#include <linux/ethtool.h>
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enum dsa_tag_protocol {
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DSA_TAG_PROTO_NONE = 0,
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DSA_TAG_PROTO_DSA,
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DSA_TAG_PROTO_TRAILER,
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DSA_TAG_PROTO_EDSA,
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DSA_TAG_PROTO_BRCM,
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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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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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/* 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 (with nr_chips elements) of which element [a]
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* indicates which port on this switch should be used to
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* send packets to that are destined for switch a. Can be
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* NULL if there is only one switch chip.
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*/
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s8 *rtable;
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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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/*
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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_switch_tree {
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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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/*
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* Reference to network device to use, and which tagging
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* protocol to use.
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*/
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struct net_device *master_netdev;
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int (*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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struct net_device *orig_dev);
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enum dsa_tag_protocol tag_protocol;
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/*
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* The switch and port to which the CPU is attached.
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*/
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s8 cpu_switch;
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s8 cpu_port;
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/*
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* Link state polling.
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*/
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int link_poll_needed;
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struct work_struct link_poll_work;
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struct timer_list link_poll_timer;
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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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struct dsa_switch {
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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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/*
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* Configuration data for this switch.
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*/
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struct dsa_chip_data *pd;
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/*
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* The used switch driver.
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*/
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struct dsa_switch_driver *drv;
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/*
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* Reference to host device to use.
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*/
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struct device *master_dev;
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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 phys_port_mask;
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u32 phys_mii_mask;
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struct mii_bus *slave_mii_bus;
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struct net_device *ports[DSA_MAX_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->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
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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_switch == ds->index)
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return dst->cpu_port;
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else
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return ds->pd->rtable[dst->cpu_switch];
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}
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struct dsa_switch_driver {
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struct list_head list;
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enum dsa_tag_protocol tag_protocol;
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int priv_size;
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/*
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* Probing and setup.
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*/
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char *(*probe)(struct device *host_dev, int sw_addr);
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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 polling and IRQ handling.
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*/
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void (*poll_link)(struct dsa_switch *ds);
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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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* EEE setttings
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*/
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int (*set_eee)(struct dsa_switch *ds, int port,
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struct phy_device *phydev,
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struct ethtool_eee *e);
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int (*get_eee)(struct dsa_switch *ds, int port,
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struct ethtool_eee *e);
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};
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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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static inline void *ds_to_priv(struct dsa_switch *ds)
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{
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return (void *)(ds + 1);
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}
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static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
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{
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return dst->rcv != NULL;
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}
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#endif
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