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Commit 2801be4a authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'bcmgenet_xmit_more' 



Florian Fainelli says:

====================
net: bcmgenet: xmit_more support

This patch series adds xmit_more support to the GENET driver by allowing
the deferal of the producer index write to the TDMA engine.

Changes in v2:

- move the netif_tx_stop_queue check *before* updating the producer index
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents d6707bec ddd0ca5d

drivers/net/ethernet/broadcom/genet/bcmgenet.c

+8 −15
Original line number Diff line number Diff line
@@ -1130,11 +1130,6 @@ static int bcmgenet_xmit_single(struct net_device *dev, 


	dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, length_status);



	/* Decrement total BD count and advance our write pointer */

	ring->free_bds -= 1;

	ring->prod_index += 1;

	ring->prod_index &= DMA_P_INDEX_MASK;



	return 0;

}
@@ -1173,11 +1168,6 @@ static int bcmgenet_xmit_frag(struct net_device *dev, 
		    (frag->size << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |

		    (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT));





	ring->free_bds -= 1;

	ring->prod_index += 1;

	ring->prod_index &= DMA_P_INDEX_MASK;



	return 0;

}
@@ -1321,15 +1311,18 @@ static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev) 


	skb_tx_timestamp(skb);



	/* we kept a software copy of how much we should advance the TDMA

	 * producer index, now write it down to the hardware

	 */

	bcmgenet_tdma_ring_writel(priv, ring->index,

				  ring->prod_index, TDMA_PROD_INDEX);

	/* Decrement total BD count and advance our write pointer */

	ring->free_bds -= nr_frags + 1;

	ring->prod_index += nr_frags + 1;

	ring->prod_index &= DMA_P_INDEX_MASK;



	if (ring->free_bds <= (MAX_SKB_FRAGS + 1))

		netif_tx_stop_queue(txq);



	if (!skb->xmit_more || netif_xmit_stopped(txq))

		/* Packets are ready, update producer index */

		bcmgenet_tdma_ring_writel(priv, ring->index,

					  ring->prod_index, TDMA_PROD_INDEX);

out:

	spin_unlock_irqrestore(&ring->lock, flags);