linux-stable/include/net/dsa.h
Florian Fainelli 4d776482ec net: dsa: Get information about stacked DSA protocol
It is possible to stack multiple DSA switches in a way that they are not
part of the tree (disjoint) but the DSA master of a switch is a DSA
slave of another. When that happens switch drivers may have to know this
is the case so as to determine whether their tagging protocol has a
remove chance of working.

This is useful for specific switch drivers such as b53 where devices
have been known to be stacked in the wild without the Broadcom tag
protocol supporting that feature. This allows b53 to continue supporting
those devices by forcing the disabling of Broadcom tags on the outermost
switches if necessary.

The get_tag_protocol() function is therefore updated to gain an
additional enum dsa_tag_protocol argument which denotes the current
tagging protocol used by the DSA master we are attached to, else
DSA_TAG_PROTO_NONE for the top of the dsa_switch_tree.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-08 16:01:13 -08:00

774 lines
21 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
* Copyright (c) 2008-2009 Marvell Semiconductor
*/
#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 <linux/phylink.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
#define DSA_TAG_PROTO_KSZ8795_VALUE 14
#define DSA_TAG_PROTO_OCELOT_VALUE 15
#define DSA_TAG_PROTO_AR9331_VALUE 16
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,
DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_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;
};
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_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;
/* List of switch ports */
struct list_head ports;
/* List of DSA links composing the routing table */
struct list_head rtable;
};
/* 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;
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 phylink_config pl_config;
struct list_head list;
/*
* 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;
bool setup;
};
/* TODO: ideally DSA ports would have a single dp->link_dp member,
* and no dst->rtable nor this struct dsa_link would be needed,
* but this would require some more complex tree walking,
* so keep it stupid at the moment and list them all.
*/
struct dsa_link {
struct dsa_port *dp;
struct dsa_port *link_dp;
struct list_head list;
};
struct dsa_switch {
bool setup;
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;
/*
* 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;
/* MAC PCS does not provide link state change interrupt, and requires
* polling. Flag passed on to PHYLINK.
*/
bool pcs_poll;
size_t num_ports;
};
static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
{
struct dsa_switch_tree *dst = ds->dst;
struct dsa_port *dp;
list_for_each_entry(dp, &dst->ports, list)
if (dp->ds == ds && dp->index == p)
return dp;
return NULL;
}
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 device */
static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
{
struct dsa_switch_tree *dst = ds->dst;
struct dsa_link *dl;
list_for_each_entry(dl, &dst->rtable, list)
if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
return dl->dp->index;
return ds->num_ports;
}
/* 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 dsa_routing_port(ds, 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,
enum dsa_tag_protocol mprot);
int (*setup)(struct dsa_switch *ds);
void (*teardown)(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);
int (*port_setup_tc)(struct dsa_switch *ds, int port,
enum tc_setup_type type, void *type_data);
/*
* 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);
/* Devlink parameters */
int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
struct devlink_param_gset_ctx *ctx);
int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
struct devlink_param_gset_ctx *ctx);
};
#define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
dsa_devlink_param_get, dsa_devlink_param_set, NULL)
int dsa_devlink_param_get(struct devlink *dl, u32 id,
struct devlink_param_gset_ctx *ctx);
int dsa_devlink_param_set(struct devlink *dl, u32 id,
struct devlink_param_gset_ctx *ctx);
int dsa_devlink_params_register(struct dsa_switch *ds,
const struct devlink_param *params,
size_t params_count);
void dsa_devlink_params_unregister(struct dsa_switch *ds,
const struct devlink_param *params,
size_t params_count);
int dsa_devlink_resource_register(struct dsa_switch *ds,
const char *resource_name,
u64 resource_size,
u64 resource_id,
u64 parent_resource_id,
const struct devlink_resource_size_params *size_params);
void dsa_devlink_resources_unregister(struct dsa_switch *ds);
void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
u64 resource_id,
devlink_resource_occ_get_t *occ_get,
void *occ_get_priv);
void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
u64 resource_id);
struct dsa_devlink_priv {
struct dsa_switch *ds;
};
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;
}
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