sfc: Add filter table management

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 152342d..ea6691c 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -619,6 +619,8 @@
 	efx_oword_t oword[EFX_MCAST_HASH_ENTRIES / sizeof(efx_oword_t) / 8];
 };
 
+struct efx_filter_state;
+
 /**
  * struct efx_nic - an Efx NIC
  * @name: Device name (net device name or bus id before net device registered)
@@ -799,6 +801,8 @@
 	u64 loopback_modes;
 
 	void *loopback_selftest;
+
+	struct efx_filter_state *filter_state;
 };
 
 static inline int efx_dev_registered(struct efx_nic *efx)