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authorArkadi Sharshevsky <arkadis@mellanox.com>2017-06-08 08:44:11 +0200
committerDavid S. Miller <davem@davemloft.net>2017-06-08 14:16:24 -0400
commit3922285d96e79231817227439c214728edfbe406 (patch)
treea251e571be926821b5e38ae4fc27dabdd95ac091 /net/bridge/br_switchdev.c
parentdc0ecabd6231f6cec2493783a4111f7a85175c8a (diff)
downloadlinux-3922285d96e79231817227439c214728edfbe406.tar.gz
net: bridge: Add support for offloading port attributes
Currently the flood, learning and learning_sync port attributes are offloaded by setting the SELF flag. Add support for offloading the flood and learning attribute through the bridge code. In case of setting an unsupported flag on a offloded port the operation will fail. The learning_sync attribute doesn't have any software representation and cannot be offloaded through the bridge code. Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Reviewed-by: Ivan Vecera <ivecera@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_switchdev.c')
-rw-r--r--net/bridge/br_switchdev.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
index f4097b900de1..b975959ac15a 100644
--- a/net/bridge/br_switchdev.c
+++ b/net/bridge/br_switchdev.c
@@ -55,3 +55,46 @@ bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
return !skb->offload_fwd_mark ||
BR_INPUT_SKB_CB(skb)->offload_fwd_mark != p->offload_fwd_mark;
}
+
+/* Flags that can be offloaded to hardware */
+#define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \
+ BR_MCAST_FLOOD | BR_BCAST_FLOOD)
+
+int br_switchdev_set_port_flag(struct net_bridge_port *p,
+ unsigned long flags,
+ unsigned long mask)
+{
+ struct switchdev_attr attr = {
+ .orig_dev = p->dev,
+ .id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT,
+ };
+ int err;
+
+ if (mask & ~BR_PORT_FLAGS_HW_OFFLOAD)
+ return 0;
+
+ err = switchdev_port_attr_get(p->dev, &attr);
+ if (err == -EOPNOTSUPP)
+ return 0;
+ if (err)
+ return err;
+
+ /* Check if specific bridge flag attribute offload is supported */
+ if (!(attr.u.brport_flags_support & mask)) {
+ br_warn(p->br, "bridge flag offload is not supported %u(%s)\n",
+ (unsigned int)p->port_no, p->dev->name);
+ return -EOPNOTSUPP;
+ }
+
+ attr.id = SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS;
+ attr.flags = SWITCHDEV_F_DEFER;
+ attr.u.brport_flags = flags;
+ err = switchdev_port_attr_set(p->dev, &attr);
+ if (err) {
+ br_warn(p->br, "error setting offload flag on port %u(%s)\n",
+ (unsigned int)p->port_no, p->dev->name);
+ return err;
+ }
+
+ return 0;
+}