target/linux/bcm63xx/patches-5.4/443-bcm63xx_enet-support_xmit_more_in_bql.patch

   1 From 79bfb73319098bc4cb701139a6677dcdec99182f Mon Sep 17 00:00:00 2001
   2 From: Sieng Piaw Liew <liew.s.piaw@gmail.com>
   3 Date: Tue, 3 Nov 2020 08:14:35 +0800
   4 Subject: [PATCH 2/2] bcm63xx: support xmit_more in BQL
   5
   6 Support bulking hardware TX queue by using xmit_more.
   7
   8 Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
   9 ---
  10  bcm63xx_enet.c | 10 ++++++----
  11  1 file changed, 6 insertions(+), 4 deletions(-)
  12
  13 --- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
  14 +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
  15 @@ -638,14 +638,16 @@ bcm_enet_start_xmit(struct sk_buff *skb,
  16
  17         netdev_sent_queue(dev, skb->len);
  18
  19 -       /* kick tx dma */
  20 -       enet_dmac_writel(priv, priv->dma_chan_en_mask,
  21 -                                ENETDMAC_CHANCFG, priv->tx_chan);
  22 -
  23         /* stop queue if no more desc available */
  24         if (!priv->tx_desc_count)
  25                 netif_stop_queue(dev);
  26
  27 +       /* kick tx dma */
  28 +       if(!netdev_xmit_more() || !priv->tx_desc_count)
  29 +               enet_dmac_writel(priv, priv->dma_chan_en_mask,
  30 +                                       ENETDMAC_CHANCFG, priv->tx_chan);
  31 +
  32 +
  33         dev->stats.tx_bytes += skb->len;
  34         dev->stats.tx_packets++;
  35         ret = NETDEV_TX_OK;
  36 @@ -2713,7 +2715,7 @@ static int bcm_enetsw_probe(struct platf
  37         priv->irq_rx = irq_rx;
  38         priv->irq_tx = irq_tx;
  39         priv->rx_ring_size = BCMENET_DEF_RX_DESC;
  40 -       priv->tx_ring_size = BCMENET_DEF_TX_DESC;
  41 +       priv->tx_ring_size = BCMENETSW_DEF_TX_DESC;
  42         priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
  43
  44         pd = dev_get_platdata(&pdev->dev);
  45 --- a/drivers/net/ethernet/broadcom/bcm63xx_enet.h
  46 +++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
  47 @@ -15,6 +15,7 @@
  48  /* default number of descriptor */
  49  #define BCMENET_DEF_RX_DESC    64
  50  #define BCMENET_DEF_TX_DESC    32
  51 +#define BCMENETSW_DEF_TX_DESC  48
  52
  53  /* maximum burst len for dma (4 bytes unit) */
  54  #define BCMENET_DMA_MAXBURST   16