Commit 3e41f93b authored by Vivien Didelot's avatar Vivien Didelot Committed by David S. Miller
Browse files

net: dsa: prepare master receive hot path 



In preparation to make DSA master devices point to their corresponding
CPU port instead of the whole tree, add copies of dst and rcv in the
dsa_port structure so that we keep fast access in the receive hot path.

Also keep the copies at the beginning of the dsa_port structure in order
to ensure they are available in cacheline 1.

Signed-off-by: default avatarVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 15240248

include/net/dsa.h

+5 −0
Original line number Diff line number Diff line
@@ -178,6 +178,11 @@ struct dsa_port { 
	/* 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);



	struct dsa_switch	*ds;

	unsigned int		index;

	const char		*name;

net/dsa/dsa2.c

+4 −0
Original line number Diff line number Diff line
@@ -524,7 +524,11 @@ static int dsa_cpu_parse(struct dsa_port *port, u32 index, 


	dst->cpu_dp->tag_ops = tag_ops;

	dst->tag_ops = tag_ops;



	/* Make a few copies for faster access in master receive hot path */

	dst->cpu_dp->rcv = dst->cpu_dp->tag_ops->rcv;

	dst->rcv = dst->tag_ops->rcv;

	dst->cpu_dp->dst = dst;



	return 0;

}

net/dsa/legacy.c

+4 −0
Original line number Diff line number Diff line
@@ -154,7 +154,11 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, 


		dst->cpu_dp->tag_ops = tag_ops;

		dst->tag_ops = tag_ops;



		/* Few copies for faster access in master receive hot path */

		dst->cpu_dp->rcv = dst->cpu_dp->tag_ops->rcv;

		dst->rcv = dst->tag_ops->rcv;

		dst->cpu_dp->dst = dst;

	}



	memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));