static void emac_init_hw(struct emac_priv *priv)
{
- u32 rxirq = 0, dma = 0;
- /* Destination address for 802.3x Ethernet flow control */
- u8 fc_dest_addr[ETH_ALEN] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x01 };
+ u32 rxirq = 0, dma = 0, frame_sz;
regmap_set_bits(priv->regmap_apmu,
priv->regmap_apmu_offset + APMU_EMAC_CTRL_REG,
DEFAULT_TX_THRESHOLD);
emac_wr(priv, MAC_RECEIVE_PACKET_START_THRESHOLD, DEFAULT_RX_THRESHOLD);
- /* Configure flow control (enabled in emac_adjust_link() later) */
- emac_set_mac_addr_reg(priv, fc_dest_addr, MAC_FC_SOURCE_ADDRESS_HIGH);
- emac_wr(priv, MAC_FC_PAUSE_HIGH_THRESHOLD, DEFAULT_FC_FIFO_HIGH);
- emac_wr(priv, MAC_FC_HIGH_PAUSE_TIME, DEFAULT_FC_PAUSE_TIME);
- emac_wr(priv, MAC_FC_PAUSE_LOW_THRESHOLD, 0);
-
+ /* Set maximum frame size and jabber size based on configured MTU,
+ * accounting for Ethernet header, double VLAN tags, and FCS.
+ */
+ frame_sz = priv->ndev->mtu + ETH_HLEN + 2 * VLAN_HLEN + ETH_FCS_LEN;
+
+ emac_wr(priv, MAC_MAXIMUM_FRAME_SIZE, frame_sz);
+ emac_wr(priv, MAC_TRANSMIT_JABBER_SIZE, frame_sz);
+ emac_wr(priv, MAC_RECEIVE_JABBER_SIZE, frame_sz);
+
/* RX IRQ mitigation */
rxirq = FIELD_PREP(MREGBIT_RECEIVE_IRQ_FRAME_COUNTER_MASK,
EMAC_RX_FRAMES);