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net: dsa: export the dsa_port_is_{user,cpu,dsa} helpers

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The difference between dsa_is_user_port and dsa_port_is_user is that the
former needs to look up the list of ports of the DSA switch tree in
order to find the struct dsa_port, while the latter directly receives it
as an argument.

dsa_is_user_port is already in widespread use and has its place, so
there isn't any chance of converting all callers to a single form.
But being able to do:
	dsa_port_is_user(dp)
instead of
	dsa_is_user_port(dp->ds, dp->index)

is much more efficient too, especially when the "dp" comes from an
iterator over the DSA switch tree - this reduces the complexity from
quadratic to linear.

Move these helpers from dsa2.c to include/net/dsa.h so that others can
use them too.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2021-06-21 19:42:15 +03:00 • committed by David S. Miller
parent 8674f8d310
commit a8986681cc
2 changed files with 15 additions and 15 deletions
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15
include/net/dsa.h
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@ -409,6 +409,21 @@ static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
return NULL;
}
static inline bool dsa_port_is_dsa(struct dsa_port *port)
{
return port->type == DSA_PORT_TYPE_DSA;
}
static inline bool dsa_port_is_cpu(struct dsa_port *port)
{
return port->type == DSA_PORT_TYPE_CPU;
}
static inline bool dsa_port_is_user(struct dsa_port *dp)
{
return dp->type == DSA_PORT_TYPE_USER;
}
static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
{
return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;