[PATCH net-next 09/14] nfp: allow converting representor's netdev into nfp_port

[Jakub Kicinski]

Based on struct net_device_ops figure out if netdev is a nfp_repr.
Use this knowledge to convert netdev directly to nfp_port.

Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Reviewed-by: Simon Horman <simon.hor...@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_net_repr.c |  2 +-
 drivers/net/ethernet/netronome/nfp/nfp_net_repr.h |  7 +++++++
 drivers/net/ethernet/netronome/nfp/nfp_port.c     | 18 +++++++++++++-----
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c 
b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
index 44416f679fdb..7bfdef2af1a9 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
@@ -249,7 +249,7 @@ static int nfp_repr_open(struct net_device *netdev)
        return nfp_app_repr_open(repr->app, repr);
 }
 
-static const struct net_device_ops nfp_repr_netdev_ops = {
+const struct net_device_ops nfp_repr_netdev_ops = {
        .ndo_open               = nfp_repr_open,
        .ndo_stop               = nfp_repr_stop,
        .ndo_start_xmit         = nfp_repr_xmit,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h 
b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
index 8f126362d5ed..6a6727816010 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h
@@ -97,6 +97,13 @@ enum nfp_repr_type {
 };
 #define NFP_REPR_TYPE_MAX (__NFP_REPR_TYPE_MAX - 1)
 
+extern const struct net_device_ops nfp_repr_netdev_ops;
+
+static inline bool nfp_netdev_is_nfp_repr(struct net_device *netdev)
+{
+       return netdev->netdev_ops == &nfp_repr_netdev_ops;
+}
+
 void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len);
 int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
                  u32 cmsg_port_id, struct nfp_port *port,
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_port.c 
b/drivers/net/ethernet/netronome/nfp/nfp_port.c
index 19bceeb82225..0be6c7e0b1c1 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_port.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_port.c
@@ -42,13 +42,21 @@
 
 struct nfp_port *nfp_port_from_netdev(struct net_device *netdev)
 {
-       struct nfp_net *nn;
+       if (nfp_netdev_is_nfp_net(netdev)) {
+               struct nfp_net *nn = netdev_priv(netdev);
 
-       if (WARN_ON(!nfp_netdev_is_nfp_net(netdev)))
-               return NULL;
-       nn = netdev_priv(netdev);
+               return nn->port;
+       }
 
-       return nn->port;
+       if (nfp_netdev_is_nfp_repr(netdev)) {
+               struct nfp_repr *repr = netdev_priv(netdev);
+
+               return repr->port;
+       }
+
+       WARN(1, "Unknown netdev type for nfp_port\n");
+
+       return NULL;
 }
 
 struct nfp_port *
-- 
2.11.0