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net: dsa: build tag_8021q.c as part of DSA core

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Upcoming patches will add tag_8021q related logic to switch.c and
port.c, in order to allow it to make use of cross-chip notifiers.
In addition, a struct dsa_8021q_context *ctx pointer will be added to
struct dsa_switch.

It seems fairly low-reward to #ifdef the *ctx from struct dsa_switch and
to provide shim implementations of the entire tag_8021q.c calling
surface (not even clear what to do about the tag_8021q cross-chip
notifiers to avoid compiling them). The runtime overhead for switches
which don't use tag_8021q is fairly small because all helpers will check
for ds->tag_8021q_ctx being a NULL pointer and stop there.

So let's make it part of dsa_core.o.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2021-07-19 20:14:47 +03:00 committed by David S. Miller
parent cedf467064
commit 8b6e638b4b
3 changed files with 1 additions and 16 deletions
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12
net/dsa/Kconfig
View file

@ -18,16 +18,6 @@ if NET_DSA
# Drivers must select the appropriate tagging format(s)
config NET_DSA_TAG_8021Q
tristate
select VLAN_8021Q
help
Unlike the other tagging protocols, the 802.1Q config option simply
provides helpers for other tagging implementations that might rely on
VLAN in one way or another. It is not a complete solution.
Drivers which use these helpers should select this as dependency.
config NET_DSA_TAG_AR9331
tristate "Tag driver for Atheros AR9331 SoC with built-in switch"
help
@ -126,7 +116,6 @@ config NET_DSA_TAG_OCELOT_8021Q
tristate "Tag driver for Ocelot family of switches, using VLAN"
depends on MSCC_OCELOT_SWITCH_LIB || \
(MSCC_OCELOT_SWITCH_LIB=n && COMPILE_TEST)
select NET_DSA_TAG_8021Q
help
Say Y or M if you want to enable support for tagging frames with a
custom VLAN-based header. Frames that require timestamping, such as
@ -149,7 +138,6 @@ config NET_DSA_TAG_LAN9303
config NET_DSA_TAG_SJA1105
tristate "Tag driver for NXP SJA1105 switches"
select NET_DSA_TAG_8021Q
select PACKING
help
Say Y or M if you want to enable support for tagging frames with the

3
net/dsa/Makefile
View file

@ -1,10 +1,9 @@
# SPDX-License-Identifier: GPL-2.0
# the core
obj-$(CONFIG_NET_DSA) += dsa_core.o
dsa_core-y += dsa.o dsa2.o master.o port.o slave.o switch.o
dsa_core-y += dsa.o dsa2.o master.o port.o slave.o switch.o tag_8021q.o
# tagging formats
obj-$(CONFIG_NET_DSA_TAG_8021Q) += tag_8021q.o
obj-$(CONFIG_NET_DSA_TAG_AR9331) += tag_ar9331.o
obj-$(CONFIG_NET_DSA_TAG_BRCM_COMMON) += tag_brcm.o
obj-$(CONFIG_NET_DSA_TAG_DSA_COMMON) += tag_dsa.o

2
net/dsa/tag_8021q.c
View file

@ -473,5 +473,3 @@ void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id)
skb->priority = (tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
}
EXPORT_SYMBOL_GPL(dsa_8021q_rcv);
MODULE_LICENSE("GPL v2");