netdev - [RFC PATCH 08/16] dsa: Copy the routing table into the switch structure

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Date:	Fri, 27 May 2016 03:20:42 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	netdev <netdev@...r.kernel.org>
Cc:	Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	John Crispin <john@...ozen.org>, Bryan.Whitehead@...rochip.com,
	Andrew Lunn <andrew@...n.ch>
Subject: [RFC PATCH 08/16] dsa: Copy the routing table into the switch structure

The new binding will not have a chip data structure, it will place the
routing directly into the switch structure. To enable backwards
compatibility, copy the routing from the chip data into the switch
structure.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/dsa/mv88e6xxx.c |  4 ++--
 include/net/dsa.h           | 10 +++++++++-
 net/dsa/dsa.c               |  2 ++
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index d622c0fb76cc..492801a6398c 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -3024,8 +3024,8 @@ static int mv88e6xxx_setup_global(struct mv88e6xxx_priv_state *ps)
 	for (i = 0; i < 32; i++) {
 		int nexthop = 0x1f;
 
-		if (i != ps->ds->index && i < ps->ds->dst->pd->nr_chips)
-			nexthop = ps->ds->cd->rtable[i] & 0x1f;
+		if (i != ds->index && i < DSA_MAX_SWITCHES)
+			nexthop = ds->rtable[i] & 0x1f;
 
 		err = _mv88e6xxx_reg_write(
 			ps, REG_GLOBAL2,
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 37e8e179d85a..ea0e7d30342b 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -149,6 +149,14 @@ struct dsa_switch {
 	 */
 	struct dsa_switch_driver	*drv;
 
+	/*
+	 * An array of which element [a] indicates which port on this
+	 * switch should be used to send packets to that are destined
+	 * for switch a.  Can be NULL if there is only one switch
+	 * chip.
+	 */
+	s8		rtable[DSA_MAX_SWITCHES];
+
 #ifdef CONFIG_NET_DSA_HWMON
 	/*
 	 * Hardware monitoring information
@@ -195,7 +203,7 @@ static inline u8 dsa_upstream_port(struct dsa_switch *ds)
 	if (dst->cpu_switch == ds->index)
 		return dst->cpu_port;
 	else
-		return ds->cd->rtable[dst->cpu_switch];
+		return ds->rtable[dst->cpu_switch];
 }
 
 struct switchdev_trans;
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 6177dd750847..bfe1d03d4730 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -297,6 +297,8 @@ static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 		dst->tag_protocol = drv->tag_protocol;
 	}
 
+	memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));
+
 	/*
 	 * Do basic register setup.
 	 */
-- 
2.8.1