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dsa: Add boilerplate helper to register DSA tag driver modules

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A DSA tag driver module will need to register the tag protocols it
implements with the DSA core. Add macros containing this boiler plate.

The registration/unregistration code is currently just a stub. A Later
patch will add the real implementation.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>

v2
Fix indent of #endif
Rewrite to move list pointer into a new structure
v3
Move kdoc next to macro
Fix THIS_MODULE indentation

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2019-04-28 19:37:15 +02:00 committed by David S. Miller
parent 056eed2fb0
commit d3b8c04988
11 changed files with 118 additions and 2 deletions
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66
include/net/dsa.h
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@ -594,4 +594,70 @@ 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

12
net/dsa/dsa.c
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@ -76,6 +76,18 @@ const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
[DSA_TAG_PROTO_NONE] = &none_ops,
};
void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
unsigned int count, struct module *owner)
{
}
EXPORT_SYMBOL_GPL(dsa_tag_drivers_register);
void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
unsigned int count)
{
}
EXPORT_SYMBOL_GPL(dsa_tag_drivers_unregister);
const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops)
{
return ops->name;

16
net/dsa/tag_brcm.c
View File

@ -175,6 +175,7 @@ const struct dsa_device_ops brcm_netdev_ops = {
.overhead = BRCM_TAG_LEN,
};
DSA_TAG_DRIVER(brcm_netdev_ops);
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_BRCM);
#endif
@ -203,5 +204,18 @@ const struct dsa_device_ops brcm_prepend_netdev_ops = {
};
#endif
MODULE_LICENSE("GPL");
DSA_TAG_DRIVER(brcm_prepend_netdev_ops);
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_BRCM_PREPEND);
static struct dsa_tag_driver *dsa_tag_driver_array[] = {
#if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM)
&DSA_TAG_DRIVER_NAME(brcm_netdev_ops),
#endif
#if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM_PREPEND)
&DSA_TAG_DRIVER_NAME(brcm_prepend_netdev_ops),
#endif
};
module_dsa_tag_drivers(dsa_tag_driver_array);
MODULE_LICENSE("GPL");

2
net/dsa/tag_dsa.c
View File

@ -161,3 +161,5 @@ const struct dsa_device_ops dsa_netdev_ops = {
MODULE_LICENSE("GPL");
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_DSA);
module_dsa_tag_driver(dsa_netdev_ops);

2
net/dsa/tag_edsa.c
View File

@ -180,3 +180,5 @@ const struct dsa_device_ops edsa_netdev_ops = {
MODULE_LICENSE("GPL");
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_EDSA);
module_dsa_tag_driver(edsa_netdev_ops);

2
net/dsa/tag_gswip.c
View File

@ -113,3 +113,5 @@ const struct dsa_device_ops gswip_netdev_ops = {
MODULE_LICENSE("GPL");
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_GSWIP);
module_dsa_tag_driver(gswip_netdev_ops);

12
net/dsa/tag_ksz.c
View File

@ -141,6 +141,7 @@ const struct dsa_device_ops ksz9477_netdev_ops = {
.overhead = KSZ9477_INGRESS_TAG_LEN,
};
DSA_TAG_DRIVER(ksz9477_netdev_ops);
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ9477);
#define KSZ9893_TAIL_TAG_OVERRIDE BIT(5)
@ -178,5 +179,14 @@ const struct dsa_device_ops ksz9893_netdev_ops = {
.overhead = KSZ_INGRESS_TAG_LEN,
};
MODULE_LICENSE("GPL");
DSA_TAG_DRIVER(ksz9893_netdev_ops);
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ9893);
static struct dsa_tag_driver *dsa_tag_driver_array[] = {
&DSA_TAG_DRIVER_NAME(ksz9477_netdev_ops),
&DSA_TAG_DRIVER_NAME(ksz9893_netdev_ops),
};
module_dsa_tag_drivers(dsa_tag_driver_array);
MODULE_LICENSE("GPL");

2
net/dsa/tag_lan9303.c
View File

@ -138,3 +138,5 @@ const struct dsa_device_ops lan9303_netdev_ops = {
MODULE_LICENSE("GPL");
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_LAN9303);
module_dsa_tag_driver(lan9303_netdev_ops);

2
net/dsa/tag_mtk.c
View File

@ -109,3 +109,5 @@ const struct dsa_device_ops mtk_netdev_ops = {
MODULE_LICENSE("GPL");
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_MTK);
module_dsa_tag_driver(mtk_netdev_ops);

2
net/dsa/tag_qca.c
View File

@ -110,3 +110,5 @@ const struct dsa_device_ops qca_netdev_ops = {
MODULE_LICENSE("GPL");
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_QCA);
module_dsa_tag_driver(qca_netdev_ops);

2
net/dsa/tag_trailer.c
View File

@ -87,3 +87,5 @@ const struct dsa_device_ops trailer_netdev_ops = {
MODULE_LICENSE("GPL");
MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_TRAILER);
module_dsa_tag_driver(trailer_netdev_ops);