[PATCH/RFC 06/12] rocker: Add helper to check ports belong to the same rocker switch

[Simon Horman]

This will be used by a follow-up patch to add Add Open vSwitch (-like) flow
support to the OF-DPA rocker world.

Signed-off-by: Simon Horman <simon.hor...@netronome.com>
---
 drivers/net/ethernet/rocker/rocker.h      |  4 ++++
 drivers/net/ethernet/rocker/rocker_main.c | 15 +++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/net/ethernet/rocker/rocker.h 
b/drivers/net/ethernet/rocker/rocker.h
index 332adce701fa..4b4a7d2af774 100644
--- a/drivers/net/ethernet/rocker/rocker.h
+++ b/drivers/net/ethernet/rocker/rocker.h
@@ -85,6 +85,10 @@ int rocker_cmd_exec(struct rocker_port *rocker_port, bool 
nowait,
 int rocker_port_set_learning(struct rocker_port *rocker_port,
                             bool learning);
 
+/* True if a and b are ports on the same rocker switch */
+bool rocker_port_dev_cmp_rocker(const struct net_device *a,
+                               const struct net_device *b);
+
 struct rocker_world_ops {
        const char *kind;
        size_t priv_size;
diff --git a/drivers/net/ethernet/rocker/rocker_main.c 
b/drivers/net/ethernet/rocker/rocker_main.c
index 6c6a486cced6..02101f88dc08 100644
--- a/drivers/net/ethernet/rocker/rocker_main.c
+++ b/drivers/net/ethernet/rocker/rocker_main.c
@@ -2859,6 +2859,21 @@ static bool rocker_port_dev_check(const struct 
net_device *dev)
        return dev->netdev_ops == &rocker_port_netdev_ops;
 }
 
+bool rocker_port_dev_cmp_rocker(const struct net_device *a,
+                               const struct net_device *b)
+{
+       struct rocker_port *rocker_port_a, *rocker_port_b;
+
+       if (!rocker_port_dev_check(a) || !rocker_port_dev_check(b))
+               return false;
+
+
+       rocker_port_a = netdev_priv(a);
+       rocker_port_b = netdev_priv(b);
+
+       return rocker_port_a->rocker == rocker_port_b->rocker;
+}
+
 static int rocker_netdevice_event(struct notifier_block *unused,
                                  unsigned long event, void *ptr)
 {
-- 
2.7.0.rc3.207.g0ac5344