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Commit 014012a4 authored by Petri Gynther's avatar Petri Gynther Committed by David S. Miller
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net: bcmgenet: precalculate TxCB->bd_addr 



There is 1-to-1 mapping between TxCBs and TxBDs. Precalculate TxCB->bd_addr
once in bcmgenet_init_dma() instead of doing it over and over needlessly in
bcmgenet_get_txcb().

Signed-off-by: default avatarPetri Gynther <pgynther@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 16c6d667

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

+8 −1
Original line number Diff line number Diff line
@@ -920,7 +920,7 @@ static struct enet_cb *bcmgenet_get_txcb(struct bcmgenet_priv *priv, 


	tx_cb_ptr = ring->cbs;

	tx_cb_ptr += ring->write_ptr - ring->cb_ptr;

	tx_cb_ptr->bd_addr = priv->tx_bds + ring->write_ptr * DMA_DESC_SIZE;



	/* Advancing local write pointer */

	if (ring->write_ptr == ring->end_ptr)

		ring->write_ptr = ring->cb_ptr;
@@ -1919,6 +1919,8 @@ static void bcmgenet_fini_dma(struct bcmgenet_priv *priv) 
static int bcmgenet_init_dma(struct bcmgenet_priv *priv)

{

	int ret;

	unsigned int i;

	struct enet_cb *cb;



	netif_dbg(priv, hw, priv->dev, "bcmgenet: init_edma\n");
@@ -1945,6 +1947,11 @@ static int bcmgenet_init_dma(struct bcmgenet_priv *priv) 
		return -ENOMEM;

	}



	for (i = 0; i < priv->num_tx_bds; i++) {

		cb = priv->tx_cbs + i;

		cb->bd_addr = priv->tx_bds + i * DMA_DESC_SIZE;

	}



	/* Initialize Tx queues */

	bcmgenet_init_tx_queues(priv->dev);