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linux/include/net/dsa.h

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/*
* include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
* Copyright (c) 2008-2009 Marvell Semiconductor
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __LINUX_NET_DSA_H
#define __LINUX_NET_DSA_H
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/of.h>
#include <linux/ethtool.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/platform_data/dsa.h>
#include <net/devlink.h>
#include <net/switchdev.h>
struct tc_action;
struct phy_device;
struct fixed_phy_status;
struct phylink_link_state;
#define DSA_TAG_PROTO_NONE_VALUE 0
#define DSA_TAG_PROTO_BRCM_VALUE 1
#define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2
#define DSA_TAG_PROTO_DSA_VALUE 3
#define DSA_TAG_PROTO_EDSA_VALUE 4
#define DSA_TAG_PROTO_GSWIP_VALUE 5
#define DSA_TAG_PROTO_KSZ9477_VALUE 6
#define DSA_TAG_PROTO_KSZ9893_VALUE 7
#define DSA_TAG_PROTO_LAN9303_VALUE 8
#define DSA_TAG_PROTO_MTK_VALUE 9
#define DSA_TAG_PROTO_QCA_VALUE 10
#define DSA_TAG_PROTO_TRAILER_VALUE 11
#define DSA_TAG_PROTO_8021Q_VALUE 12
#define DSA_TAG_PROTO_SJA1105_VALUE 13
enum dsa_tag_protocol {
DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE,
DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
};
struct packet_type;
struct dsa_switch;
struct dsa_device_ops {
struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt);
int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
int *offset);
/* Used to determine which traffic should match the DSA filter in
* eth_type_trans, and which, if any, should bypass it and be processed
* as regular on the master net device.
*/
bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
unsigned int overhead;
const char *name;
enum dsa_tag_protocol proto;
};
#define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
#define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \
MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
struct dsa_skb_cb {
struct sk_buff *clone;
bool deferred_xmit;
};
struct __dsa_skb_cb {
struct dsa_skb_cb cb;
u8 priv[48 - sizeof(struct dsa_skb_cb)];
};
#define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb))
#define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
#define DSA_SKB_CB_PRIV(skb) \
((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
struct dsa_switch_tree {
struct list_head list;
/* Notifier chain for switch-wide events */
struct raw_notifier_head nh;
/* Tree identifier */
unsigned int index;
/* Number of switches attached to this tree */
struct kref refcount;
/* Has this tree been applied to the hardware? */
bool setup;
/*
* Configuration data for the platform device that owns
* this dsa switch tree instance.
*/
struct dsa_platform_data *pd;
/*
* The switch port to which the CPU is attached.
*/
struct dsa_port *cpu_dp;
/*
* Data for the individual switch chips.
*/
struct dsa_switch *ds[DSA_MAX_SWITCHES];
};
/* TC matchall action types, only mirroring for now */
enum dsa_port_mall_action_type {
DSA_PORT_MALL_MIRROR,
};
/* TC mirroring entry */
struct dsa_mall_mirror_tc_entry {
u8 to_local_port;
bool ingress;
};
/* TC matchall entry */
struct dsa_mall_tc_entry {
struct list_head list;
unsigned long cookie;
enum dsa_port_mall_action_type type;
union {
struct dsa_mall_mirror_tc_entry mirror;
};
};
struct dsa_port {
/* A CPU port is physically connected to a master device.
* A user port exposed to userspace has a slave device.
*/
union {
struct net_device *master;
struct net_device *slave;
};
/* CPU port tagging operations used by master or slave devices */
const struct dsa_device_ops *tag_ops;
/* Copies for faster access in master receive hot path */
struct dsa_switch_tree *dst;
struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt);
bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
enum {
DSA_PORT_TYPE_UNUSED = 0,
DSA_PORT_TYPE_CPU,
DSA_PORT_TYPE_DSA,
DSA_PORT_TYPE_USER,
} type;
struct dsa_switch *ds;
unsigned int index;
const char *name;
const struct dsa_port *cpu_dp;
const char *mac;
struct device_node *dn;
unsigned int ageing_time;
bool vlan_filtering;
u8 stp_state;
struct net_device *bridge_dev;
struct devlink_port devlink_port;
struct phylink *pl;
struct work_struct xmit_work;
struct sk_buff_head xmit_queue;
/*
* Give the switch driver somewhere to hang its per-port private data
* structures (accessible from the tagger).
*/
void *priv;
/*
* Original copy of the master netdev ethtool_ops
*/
const struct ethtool_ops *orig_ethtool_ops;
/*
* Original copy of the master netdev net_device_ops
*/
const struct net_device_ops *orig_ndo_ops;
};
struct dsa_switch {
struct device *dev;
/*
* Parent switch tree, and switch index.
*/
struct dsa_switch_tree *dst;
unsigned int index;
/* Listener for switch fabric events */
struct notifier_block nb;
/*
* Give the switch driver somewhere to hang its private data
* structure.
*/
void *priv;
/*
* Configuration data for this switch.
*/
struct dsa_chip_data *cd;
/*
* The switch operations.
*/
const struct dsa_switch_ops *ops;
/*
* An array of which element [a] indicates which port on this
* switch should be used to send packets to that are destined
* for switch a. Can be NULL if there is only one switch chip.
*/
s8 rtable[DSA_MAX_SWITCHES];
/*
* Slave mii_bus and devices for the individual ports.
*/
u32 phys_mii_mask;
struct mii_bus *slave_mii_bus;
/* Ageing Time limits in msecs */
unsigned int ageing_time_min;
unsigned int ageing_time_max;
/* devlink used to represent this switch device */
struct devlink *devlink;
/* Number of switch port queues */
unsigned int num_tx_queues;
/* Disallow bridge core from requesting different VLAN awareness
* settings on ports if not hardware-supported
*/
bool vlan_filtering_is_global;
/* In case vlan_filtering_is_global is set, the VLAN awareness state
* should be retrieved from here and not from the per-port settings.
*/
bool vlan_filtering;
unsigned long *bitmap;
unsigned long _bitmap;
/* Dynamically allocated ports, keep last */
size_t num_ports;
struct dsa_port ports[];
};
static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
{
return &ds->ports[p];
}
static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
{
return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
}
static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
{
return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
}
static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
{
return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
}
static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
{
return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
}
static inline u32 dsa_user_ports(struct dsa_switch *ds)
{
u32 mask = 0;
int p;
for (p = 0; p < ds->num_ports; p++)
if (dsa_is_user_port(ds, p))
mask |= BIT(p);
return mask;
}
/* Return the local port used to reach an arbitrary switch port */
static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
int port)
{
if (device == ds->index)
return port;
else
return ds->rtable[device];
}
/* Return the local port used to reach the dedicated CPU port */
static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
{
const struct dsa_port *dp = dsa_to_port(ds, port);
const struct dsa_port *cpu_dp = dp->cpu_dp;
if (!cpu_dp)
return port;
return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
}
static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
{
const struct dsa_switch *ds = dp->ds;
if (ds->vlan_filtering_is_global)
return ds->vlan_filtering;
else
return dp->vlan_filtering;
}
typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
bool is_static, void *data);
struct dsa_switch_ops {
enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
int port);
int (*setup)(struct dsa_switch *ds);
u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
/*
* Access to the switch's PHY registers.
*/
int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
int (*phy_write)(struct dsa_switch *ds, int port,
int regnum, u16 val);
/*
* Link state adjustment (called from libphy)
*/
void (*adjust_link)(struct dsa_switch *ds, int port,
struct phy_device *phydev);
void (*fixed_link_update)(struct dsa_switch *ds, int port,
struct fixed_phy_status *st);
/*
* PHYLINK integration
*/
void (*phylink_validate)(struct dsa_switch *ds, int port,
unsigned long *supported,
struct phylink_link_state *state);
int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
struct phylink_link_state *state);
void (*phylink_mac_config)(struct dsa_switch *ds, int port,
unsigned int mode,
const struct phylink_link_state *state);
void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
unsigned int mode,
phy_interface_t interface);
void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
unsigned int mode,
phy_interface_t interface,
struct phy_device *phydev);
void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
struct phylink_link_state *state);
/*
* ethtool hardware statistics.
*/
void (*get_strings)(struct dsa_switch *ds, int port,
u32 stringset, uint8_t *data);
void (*get_ethtool_stats)(struct dsa_switch *ds,
int port, uint64_t *data);
int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
int port, uint64_t *data);
/*
* ethtool Wake-on-LAN
*/
void (*get_wol)(struct dsa_switch *ds, int port,
struct ethtool_wolinfo *w);
int (*set_wol)(struct dsa_switch *ds, int port,
struct ethtool_wolinfo *w);
/*
* ethtool timestamp info
*/
int (*get_ts_info)(struct dsa_switch *ds, int port,
struct ethtool_ts_info *ts);
/*
* Suspend and resume
*/
int (*suspend)(struct dsa_switch *ds);
int (*resume)(struct dsa_switch *ds);
/*
* Port enable/disable
*/
int (*port_enable)(struct dsa_switch *ds, int port,
struct phy_device *phy);
void (*port_disable)(struct dsa_switch *ds, int port);
/*
* Port's MAC EEE settings
*/
int (*set_mac_eee)(struct dsa_switch *ds, int port,
struct ethtool_eee *e);
int (*get_mac_eee)(struct dsa_switch *ds, int port,
struct ethtool_eee *e);
/* EEPROM access */
int (*get_eeprom_len)(struct dsa_switch *ds);
int (*get_eeprom)(struct dsa_switch *ds,
struct ethtool_eeprom *eeprom, u8 *data);
int (*set_eeprom)(struct dsa_switch *ds,
struct ethtool_eeprom *eeprom, u8 *data);
/*
* Register access.
*/
int (*get_regs_len)(struct dsa_switch *ds, int port);
void (*get_regs)(struct dsa_switch *ds, int port,
struct ethtool_regs *regs, void *p);
/*
* Bridge integration
*/
int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
int (*port_bridge_join)(struct dsa_switch *ds, int port,
struct net_device *bridge);
void (*port_bridge_leave)(struct dsa_switch *ds, int port,
struct net_device *bridge);
void (*port_stp_state_set)(struct dsa_switch *ds, int port,
u8 state);
void (*port_fast_age)(struct dsa_switch *ds, int port);
int (*port_egress_floods)(struct dsa_switch *ds, int port,
bool unicast, bool multicast);
/*
* VLAN support
*/
int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
bool vlan_filtering);
int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan);
void (*port_vlan_add)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan);
int (*port_vlan_del)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_vlan *vlan);
/*
* Forwarding database
*/
int (*port_fdb_add)(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid);
int (*port_fdb_del)(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid);
int (*port_fdb_dump)(struct dsa_switch *ds, int port,
dsa_fdb_dump_cb_t *cb, void *data);
/*
* Multicast database
*/
int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb);
void (*port_mdb_add)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb);
int (*port_mdb_del)(struct dsa_switch *ds, int port,
const struct switchdev_obj_port_mdb *mdb);
/*
* RXNFC
*/
int (*get_rxnfc)(struct dsa_switch *ds, int port,
struct ethtool_rxnfc *nfc, u32 *rule_locs);
int (*set_rxnfc)(struct dsa_switch *ds, int port,
struct ethtool_rxnfc *nfc);
/*
* TC integration
*/
int (*port_mirror_add)(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror,
bool ingress);
void (*port_mirror_del)(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror);
/*
* Cross-chip operations
*/
int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
int port, struct net_device *br);
void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
int port, struct net_device *br);
/*
* PTP functionality
*/
int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
struct ifreq *ifr);
int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
struct ifreq *ifr);
bool (*port_txtstamp)(struct dsa_switch *ds, int port,
struct sk_buff *clone, unsigned int type);
bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
struct sk_buff *skb, unsigned int type);
/*
* Deferred frame Tx
*/
netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port,
struct sk_buff *skb);
};
struct dsa_switch_driver {
struct list_head list;
const struct dsa_switch_ops *ops;
};
struct net_device *dsa_dev_to_net_device(struct device *dev);
/* Keep inline for faster access in hot path */
static inline bool netdev_uses_dsa(struct net_device *dev)
{
#if IS_ENABLED(CONFIG_NET_DSA)
return dev->dsa_ptr && dev->dsa_ptr->rcv;
#endif
return false;
}
static inline bool dsa_can_decode(const struct sk_buff *skb,
struct net_device *dev)
{
#if IS_ENABLED(CONFIG_NET_DSA)
return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
#endif
return false;
}
struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
void dsa_unregister_switch(struct dsa_switch *ds);
int dsa_register_switch(struct dsa_switch *ds);
#ifdef CONFIG_PM_SLEEP
int dsa_switch_suspend(struct dsa_switch *ds);
int dsa_switch_resume(struct dsa_switch *ds);
#else
static inline int dsa_switch_suspend(struct dsa_switch *ds)
{
return 0;
}
static inline int dsa_switch_resume(struct dsa_switch *ds)
{
return 0;
}
#endif /* CONFIG_PM_SLEEP */
enum dsa_notifier_type {
DSA_PORT_REGISTER,
DSA_PORT_UNREGISTER,
};
struct dsa_notifier_info {
struct net_device *dev;
};
struct dsa_notifier_register_info {
struct dsa_notifier_info info; /* must be first */
struct net_device *master;
unsigned int port_number;
unsigned int switch_number;
};
static inline struct net_device *
dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
{
return info->dev;
}
#if IS_ENABLED(CONFIG_NET_DSA)
int register_dsa_notifier(struct notifier_block *nb);
int unregister_dsa_notifier(struct notifier_block *nb);
int call_dsa_notifiers(unsigned long val, struct net_device *dev,
struct dsa_notifier_info *info);
#else
static inline int register_dsa_notifier(struct notifier_block *nb)
{
return 0;
}
static inline int unregister_dsa_notifier(struct notifier_block *nb)
{
return 0;
}
static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
struct dsa_notifier_info *info)
{
return NOTIFY_DONE;
}
#endif
/* Broadcom tag specific helpers to insert and extract queue/port number */
#define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q)
#define BRCM_TAG_GET_PORT(v) ((v) >> 8)
#define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff)
netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
int dsa_port_get_phy_sset_count(struct dsa_port *dp);
void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
struct dsa_tag_driver {
const struct dsa_device_ops *ops;
struct list_head list;
struct module *owner;
};
void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
unsigned int count,
struct module *owner);
void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
unsigned int count);
#define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
static int __init dsa_tag_driver_module_init(void) \
{ \
dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \
THIS_MODULE); \
return 0; \
} \
module_init(dsa_tag_driver_module_init); \
\
static void __exit dsa_tag_driver_module_exit(void) \
{ \
dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \
} \
module_exit(dsa_tag_driver_module_exit)
/**
* module_dsa_tag_drivers() - Helper macro for registering DSA tag
* drivers
* @__ops_array: Array of tag driver strucutres
*
* Helper macro for DSA tag drivers which do not do anything special
* in module init/exit. Each module may only use this macro once, and
* calling it replaces module_init() and module_exit().
*/
#define module_dsa_tag_drivers(__ops_array) \
dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
#define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
/* Create a static structure we can build a linked list of dsa_tag
* drivers
*/
#define DSA_TAG_DRIVER(__ops) \
static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \
.ops = &__ops, \
}
/**
* module_dsa_tag_driver() - Helper macro for registering a single DSA tag
* driver
* @__ops: Single tag driver structures
*
* Helper macro for DSA tag drivers which do not do anything special
* in module init/exit. Each module may only use this macro once, and
* calling it replaces module_init() and module_exit().
*/
#define module_dsa_tag_driver(__ops) \
DSA_TAG_DRIVER(__ops); \
\
static struct dsa_tag_driver *dsa_tag_driver_array[] = { \
&DSA_TAG_DRIVER_NAME(__ops) \
}; \
module_dsa_tag_drivers(dsa_tag_driver_array)
#endif
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