-/* bcmgenet_hfb_add_filter
- *
- * Add new filter to Hardware Filter Block to match and direct Rx traffic to
- * desired Rx queue.
- *
- * f_data is an array of unsigned 32-bit integers where each 32-bit integer
- * provides filter data for 2 bytes (4 nibbles) of Rx frame:
- *
- * bits 31:20 - unused
- * bit 19 - nibble 0 match enable
- * bit 18 - nibble 1 match enable
- * bit 17 - nibble 2 match enable
- * bit 16 - nibble 3 match enable
- * bits 15:12 - nibble 0 data
- * bits 11:8 - nibble 1 data
- * bits 7:4 - nibble 2 data
- * bits 3:0 - nibble 3 data
- *
- * Example:
- * In order to match:
- * - Ethernet frame type = 0x0800 (IP)
- * - IP version field = 4
- * - IP protocol field = 0x11 (UDP)
- *
- * The following filter is needed:
- * u32 hfb_filter_ipv4_udp[] = {
- * Rx frame offset 0x00: 0x00000000, 0x00000000, 0x00000000, 0x00000000,
- * Rx frame offset 0x08: 0x00000000, 0x00000000, 0x000F0800, 0x00084000,
- * Rx frame offset 0x10: 0x00000000, 0x00000000, 0x00000000, 0x00030011,
- * };
- *
- * To add the filter to HFB and direct the traffic to Rx queue 0, call:
- * bcmgenet_hfb_add_filter(priv, hfb_filter_ipv4_udp,
- * ARRAY_SIZE(hfb_filter_ipv4_udp), 0);
- */
-int bcmgenet_hfb_add_filter(struct bcmgenet_priv *priv, u32 *f_data,
- u32 f_length, u32 rx_queue)
-{
- int f_index;
-
- f_index = bcmgenet_hfb_find_unused_filter(priv);
- if (f_index < 0)
- return -ENOMEM;
-
- if (f_length > priv->hw_params->hfb_filter_size)
- return -EINVAL;
-
- bcmgenet_hfb_set_filter(priv, f_data, f_length, rx_queue, f_index);
- bcmgenet_hfb_enable_filter(priv, f_index);
-
- return 0;
-}
-