sfc: support RSS spreading of ethtool ntuple filters

Use a linked list to associate user-facing context IDs with FW-facing
 context IDs (since the latter can change after an MC reset).

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 0cddc5a..3429ae3 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -34,7 +34,8 @@
 extern bool efx_separate_tx_channels;
 
 /* RX */
-void efx_set_default_rx_indir_table(struct efx_nic *efx);
+void efx_set_default_rx_indir_table(struct efx_nic *efx,
+				    struct efx_rss_context *ctx);
 void efx_rx_config_page_split(struct efx_nic *efx);
 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
@@ -182,6 +183,15 @@
 #endif
 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
 
+/* RSS contexts */
+struct efx_rss_context *efx_alloc_rss_context_entry(struct list_head *list);
+struct efx_rss_context *efx_find_rss_context_entry(u32 id, struct list_head *list);
+void efx_free_rss_context_entry(struct efx_rss_context *ctx);
+static inline bool efx_rss_active(struct efx_rss_context *ctx)
+{
+	return ctx->context_id != EFX_EF10_RSS_CONTEXT_INVALID;
+}
+
 /* Channels */
 int efx_channel_dummy_op_int(struct efx_channel *channel);
 void efx_channel_dummy_op_void(struct efx_channel *channel);