sfc: Make most filter operations NIC-type-specific

Aside from accelerated RFS, there is almost nothing that can be shared
between the filter table implementations for the Falcon architecture
and EF10.

Move the few shared functions into efx.c and rx.c and the rest into
farch.c.  Introduce efx_nic_type operations for the implementation and
inline wrapper functions that call these.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 86 insertions, 21 deletions

diff --git a/drivers/net/ethernet/sfc/efx.h b/drivers/net/ethernet/sfc/efx.h
index 45de5b9fedbe..9e3573872e57 100644
--- a/drivers/net/ethernet/sfc/efx.h
+++ b/drivers/net/ethernet/sfc/efx.h
@@ -68,27 +68,92 @@ extern void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
 #define EFX_TXQ_MIN_ENT(efx)	(2 * efx_tx_max_skb_descs(efx))
 
 /* Filters */
-extern int efx_probe_filters(struct efx_nic *efx);
-extern void efx_restore_filters(struct efx_nic *efx);
-extern void efx_remove_filters(struct efx_nic *efx);
-extern void efx_filter_update_rx_scatter(struct efx_nic *efx);
-extern s32 efx_filter_insert_filter(struct efx_nic *efx,
-				    struct efx_filter_spec *spec,
-				    bool replace);
-extern int efx_filter_remove_id_safe(struct efx_nic *efx,
-				     enum efx_filter_priority priority,
-				     u32 filter_id);
-extern int efx_filter_get_filter_safe(struct efx_nic *efx,
-				      enum efx_filter_priority priority,
-				      u32 filter_id, struct efx_filter_spec *);
-extern void efx_filter_clear_rx(struct efx_nic *efx,
-				enum efx_filter_priority priority);
-extern u32 efx_filter_count_rx_used(struct efx_nic *efx,
-				    enum efx_filter_priority priority);
-extern u32 efx_filter_get_rx_id_limit(struct efx_nic *efx);
-extern s32 efx_filter_get_rx_ids(struct efx_nic *efx,
-				 enum efx_filter_priority priority,
-				 u32 *buf, u32 size);
+
+/**
+ * efx_filter_insert_filter - add or replace a filter
+ * @efx: NIC in which to insert the filter
+ * @spec: Specification for the filter
+ * @replace_equal: Flag for whether the specified filter may replace an
+ *	existing filter with equal priority
+ *
+ * On success, return the filter ID.
+ * On failure, return a negative error code.
+ *
+ * If an existing filter has equal match values to the new filter
+ * spec, then the new filter might replace it, depending on the
+ * relative priorities.  If the existing filter has lower priority, or
+ * if @replace_equal is set and it has equal priority, then it is
+ * replaced.  Otherwise the function fails, returning -%EPERM if
+ * the existing filter has higher priority or -%EEXIST if it has
+ * equal priority.
+ */
+static inline s32 efx_filter_insert_filter(struct efx_nic *efx,
+					   struct efx_filter_spec *spec,
+					   bool replace_equal)
+{
+	return efx->type->filter_insert(efx, spec, replace_equal);
+}
+
+/**
+ * efx_filter_remove_id_safe - remove a filter by ID, carefully
+ * @efx: NIC from which to remove the filter
+ * @priority: Priority of filter, as passed to @efx_filter_insert_filter
+ * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
+ *
+ * This function will range-check @filter_id, so it is safe to call
+ * with a value passed from userland.
+ */
+static inline int efx_filter_remove_id_safe(struct efx_nic *efx,
+					    enum efx_filter_priority priority,
+					    u32 filter_id)
+{
+	return efx->type->filter_remove_safe(efx, priority, filter_id);
+}
+
+/**
+ * efx_filter_get_filter_safe - retrieve a filter by ID, carefully
+ * @efx: NIC from which to remove the filter
+ * @priority: Priority of filter, as passed to @efx_filter_insert_filter
+ * @filter_id: ID of filter, as returned by @efx_filter_insert_filter
+ * @spec: Buffer in which to store filter specification
+ *
+ * This function will range-check @filter_id, so it is safe to call
+ * with a value passed from userland.
+ */
+static inline int
+efx_filter_get_filter_safe(struct efx_nic *efx,
+			   enum efx_filter_priority priority,
+			   u32 filter_id, struct efx_filter_spec *spec)
+{
+	return efx->type->filter_get_safe(efx, priority, filter_id, spec);
+}
+
+/**
+ * efx_farch_filter_clear_rx - remove RX filters by priority
+ * @efx: NIC from which to remove the filters
+ * @priority: Maximum priority to remove
+ */
+static inline void efx_filter_clear_rx(struct efx_nic *efx,
+				       enum efx_filter_priority priority)
+{
+	return efx->type->filter_clear_rx(efx, priority);
+}
+
+static inline u32 efx_filter_count_rx_used(struct efx_nic *efx,
+					   enum efx_filter_priority priority)
+{
+	return efx->type->filter_count_rx_used(efx, priority);
+}
+static inline u32 efx_filter_get_rx_id_limit(struct efx_nic *efx)
+{
+	return efx->type->filter_get_rx_id_limit(efx);
+}
+static inline s32 efx_filter_get_rx_ids(struct efx_nic *efx,
+					enum efx_filter_priority priority,
+					u32 *buf, u32 size)
+{
+	return efx->type->filter_get_rx_ids(efx, priority, buf, size);
+}
 #ifdef CONFIG_RFS_ACCEL
 extern int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 			  u16 rxq_index, u32 flow_id);