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418 lines
11 KiB
418 lines
11 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_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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DSA_TAG_PROTO_QCA, |
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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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/* 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_switch_tree { |
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struct list_head list; |
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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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/* |
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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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/* |
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* Original copy of the master netdev ethtool_ops |
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*/ |
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struct ethtool_ops master_ethtool_ops; |
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const struct ethtool_ops *master_orig_ethtool_ops; |
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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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* 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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struct dsa_port { |
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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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}; |
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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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/* |
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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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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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#ifdef CONFIG_NET_DSA_HWMON |
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/* |
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* Hardware monitoring information |
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*/ |
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char hwmon_name[IFNAMSIZ + 8]; |
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struct device *hwmon_dev; |
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#endif |
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/* |
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* The lower device this switch uses to talk to the host |
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*/ |
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struct net_device *master_netdev; |
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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 dsa_port ports[DSA_MAX_PORTS]; |
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struct mii_bus *slave_mii_bus; |
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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 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_port_initialized(struct dsa_switch *ds, int p) |
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{ |
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return ds->enabled_port_mask & (1 << p) && ds->ports[p].netdev; |
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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->rtable[dst->cpu_switch]; |
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} |
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struct switchdev_trans; |
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struct switchdev_obj; |
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struct switchdev_obj_port_fdb; |
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struct switchdev_obj_port_mdb; |
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struct switchdev_obj_port_vlan; |
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struct dsa_switch_ops { |
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struct list_head list; |
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/* |
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* Probing and setup. |
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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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* 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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#ifdef CONFIG_NET_DSA_HWMON |
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/* Hardware monitoring */ |
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int (*get_temp)(struct dsa_switch *ds, int *temp); |
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int (*get_temp_limit)(struct dsa_switch *ds, int *temp); |
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int (*set_temp_limit)(struct dsa_switch *ds, int temp); |
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int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm); |
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#endif |
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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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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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int (*port_vlan_dump)(struct dsa_switch *ds, int port, |
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struct switchdev_obj_port_vlan *vlan, |
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int (*cb)(struct switchdev_obj *obj)); |
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/* |
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* Forwarding database |
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*/ |
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int (*port_fdb_prepare)(struct dsa_switch *ds, int port, |
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const struct switchdev_obj_port_fdb *fdb, |
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struct switchdev_trans *trans); |
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void (*port_fdb_add)(struct dsa_switch *ds, int port, |
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const struct switchdev_obj_port_fdb *fdb, |
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struct switchdev_trans *trans); |
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int (*port_fdb_del)(struct dsa_switch *ds, int port, |
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const struct switchdev_obj_port_fdb *fdb); |
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int (*port_fdb_dump)(struct dsa_switch *ds, int port, |
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struct switchdev_obj_port_fdb *fdb, |
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int (*cb)(struct switchdev_obj *obj)); |
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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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int (*port_mdb_dump)(struct dsa_switch *ds, int port, |
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struct switchdev_obj_port_mdb *mdb, |
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int (*cb)(struct switchdev_obj *obj)); |
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}; |
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void register_switch_driver(struct dsa_switch_ops *type); |
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void unregister_switch_driver(struct dsa_switch_ops *type); |
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struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev); |
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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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void dsa_unregister_switch(struct dsa_switch *ds); |
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int dsa_register_switch(struct dsa_switch *ds, struct device_node *np); |
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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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