Commit c900e49d authored by Sean Anderson's avatar Sean Anderson Committed by Jakub Kicinski
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net: xilinx: axienet: Implement BQL 



Implement byte queue limits to allow queueing disciplines to account for
packets enqueued in the ring buffers but not yet transmitted.

Signed-off-by: default avatarSean Anderson <sean.anderson@linux.dev>
Link: https://patch.msgid.link/20250214211252.2615573-1-sean.anderson@linux.dev


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 8af2136e

drivers/net/ethernet/xilinx/xilinx_axienet_main.c

+4 −0
Original line number Diff line number Diff line
@@ -1002,6 +1002,7 @@ static int axienet_tx_poll(struct napi_struct *napi, int budget) 
					&size, budget);



	if (packets) {

		netdev_completed_queue(ndev, packets, size);

		u64_stats_update_begin(&lp->tx_stat_sync);

		u64_stats_add(&lp->tx_packets, packets);

		u64_stats_add(&lp->tx_bytes, size);
@@ -1125,6 +1126,7 @@ axienet_start_xmit(struct sk_buff *skb, struct net_device *ndev) 
	if (++new_tail_ptr >= lp->tx_bd_num)

		new_tail_ptr = 0;

	WRITE_ONCE(lp->tx_bd_tail, new_tail_ptr);

	netdev_sent_queue(ndev, skb->len);



	/* Start the transfer */

	axienet_dma_out_addr(lp, XAXIDMA_TX_TDESC_OFFSET, tail_p);
@@ -1751,6 +1753,7 @@ static int axienet_stop(struct net_device *ndev) 
		dma_release_channel(lp->tx_chan);

	}



	netdev_reset_queue(ndev);

	axienet_iow(lp, XAE_IE_OFFSET, 0);



	if (lp->eth_irq > 0)
@@ -2676,6 +2679,7 @@ static void axienet_dma_err_handler(struct work_struct *work) 
			   ~(XAE_OPTION_TXEN | XAE_OPTION_RXEN));



	axienet_dma_stop(lp);

	netdev_reset_queue(ndev);



	for (i = 0; i < lp->tx_bd_num; i++) {

		cur_p = &lp->tx_bd_v[i];