From 6981e104a8c3300f053142142d4606d8bbfceee7 Mon Sep 17 00:00:00 2001
From: Yuval Mintz
Date: Mon, 26 Mar 2018 15:01:43 +0300
Subject: mlxsw: spectrum_mr: Add ipv6 specific operations

Populate the various operation structures meant for IPv6 with logic
unique to that protocol suite.

Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c | 56 +++++++++++++++++++++++
 drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.h |  1 +
 2 files changed, 57 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c
index ba6bcbe6f75b..a82539609d49 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.c
@@ -33,6 +33,7 @@
  */
 
 #include <linux/rhashtable.h>
+#include <net/ipv6.h>
 
 #include "spectrum_mr.h"
 #include "spectrum_router.h"
@@ -840,11 +841,60 @@ static bool mlxsw_sp_mr_vif4_is_regular(const struct mlxsw_sp_mr_vif *vif)
 	return !(vif->vif_flags & (VIFF_TUNNEL | VIFF_REGISTER));
 }
 
+static bool
+mlxsw_sp_mr_route6_validate(const struct mlxsw_sp_mr_table *mr_table,
+			    const struct mr_mfc *c)
+{
+	struct mfc6_cache *mfc = (struct mfc6_cache *) c;
+
+	/* If the route is a (*,*) route, abort, as these kind of routes are
+	 * used for proxy routes.
+	 */
+	if (ipv6_addr_any(&mfc->mf6c_origin) &&
+	    ipv6_addr_any(&mfc->mf6c_mcastgrp)) {
+		dev_warn(mr_table->mlxsw_sp->bus_info->dev,
+			 "Offloading proxy routes is not supported.\n");
+		return false;
+	}
+	return true;
+}
+
+static void mlxsw_sp_mr_route6_key(struct mlxsw_sp_mr_table *mr_table,
+				   struct mlxsw_sp_mr_route_key *key,
+				   struct mr_mfc *c)
+{
+	const struct mfc6_cache *mfc = (struct mfc6_cache *) c;
+
+	memset(key, 0, sizeof(*key));
+	key->vrid = mr_table->vr_id;
+	key->proto = MLXSW_SP_L3_PROTO_IPV6;
+	key->group.addr6 = mfc->mf6c_mcastgrp;
+	memset(&key->group_mask.addr6, 0xff, sizeof(key->group_mask.addr6));
+	key->source.addr6 = mfc->mf6c_origin;
+	if (!ipv6_addr_any(&mfc->mf6c_origin))
+		memset(&key->source_mask.addr6, 0xff,
+		       sizeof(key->source_mask.addr6));
+}
+
+static bool mlxsw_sp_mr_route6_starg(const struct mlxsw_sp_mr_table *mr_table,
+				     const struct mlxsw_sp_mr_route *mr_route)
+{
+	return ipv6_addr_any(&mr_route->key.source_mask.addr6);
+}
+
+static bool mlxsw_sp_mr_vif6_is_regular(const struct mlxsw_sp_mr_vif *vif)
+{
+	return !(vif->vif_flags & MIFF_REGISTER);
+}
+
 static struct
 mlxsw_sp_mr_vif_ops mlxsw_sp_mr_vif_ops_arr[] = {
 	{
 		.is_regular = mlxsw_sp_mr_vif4_is_regular,
 	},
+	{
+		.is_regular = mlxsw_sp_mr_vif6_is_regular,
+	},
 };
 
 static struct
@@ -854,6 +904,12 @@ mlxsw_sp_mr_table_ops mlxsw_sp_mr_table_ops_arr[] = {
 		.key_create = mlxsw_sp_mr_route4_key,
 		.is_route_starg = mlxsw_sp_mr_route4_starg,
 	},
+	{
+		.is_route_valid = mlxsw_sp_mr_route6_validate,
+		.key_create = mlxsw_sp_mr_route6_key,
+		.is_route_starg = mlxsw_sp_mr_route6_starg,
+	},
+
 };
 
 struct mlxsw_sp_mr_table *mlxsw_sp_mr_table_create(struct mlxsw_sp *mlxsw_sp,
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.h
index 6f94fc9eea1b..7c864a86811d 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_mr.h
@@ -36,6 +36,7 @@
 #define _MLXSW_SPECTRUM_MCROUTER_H
 
 #include <linux/mroute.h>
+#include <linux/mroute6.h>
 #include "spectrum_router.h"
 #include "spectrum.h"
 
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