diff options
Diffstat (limited to 'target/linux/lantiq/patches-5.15/0710-v5.16-net-lantiq-configure-the-burst-length-in-ethernet-dr.patch')
| -rw-r--r-- | target/linux/lantiq/patches-5.15/0710-v5.16-net-lantiq-configure-the-burst-length-in-ethernet-dr.patch | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-5.15/0710-v5.16-net-lantiq-configure-the-burst-length-in-ethernet-dr.patch b/target/linux/lantiq/patches-5.15/0710-v5.16-net-lantiq-configure-the-burst-length-in-ethernet-dr.patch new file mode 100644 index 0000000000..4fb7d0767b --- /dev/null +++ b/target/linux/lantiq/patches-5.15/0710-v5.16-net-lantiq-configure-the-burst-length-in-ethernet-dr.patch @@ -0,0 +1,126 @@ +From 14d4e308e0aa0b78dc7a059716861a4380de3535 Mon Sep 17 00:00:00 2001 +From: Aleksander Jan Bajkowski <olek2@wp.pl> +Date: Tue, 14 Sep 2021 23:21:02 +0200 +Subject: [PATCH 5/5] net: lantiq: configure the burst length in ethernet + drivers + +Configure the burst length in Ethernet drivers. This improves +Ethernet performance by 58%. According to the vendor BSP, +8W burst length is supported by ar9 and newer SoCs. + +The NAT benchmark results on xRX200 (Down/Up): +* 2W: 330 Mb/s +* 4W: 432 Mb/s 372 Mb/s +* 8W: 520 Mb/s 389 Mb/s + +Tested on xRX200 and xRX330. + +Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/ethernet/lantiq_etop.c | 21 ++++++++++++++++++--- + drivers/net/ethernet/lantiq_xrx200.c | 21 ++++++++++++++++++--- + 2 files changed, 36 insertions(+), 6 deletions(-) + +--- a/drivers/net/ethernet/lantiq_etop.c ++++ b/drivers/net/ethernet/lantiq_etop.c +@@ -148,6 +148,9 @@ struct ltq_etop_priv { + struct ltq_etop_chan txch; + struct ltq_etop_chan rxch; + ++ int tx_burst_len; ++ int rx_burst_len; ++ + int tx_irq; + int rx_irq; + +@@ -399,7 +402,7 @@ ltq_etop_dma_init(struct net_device *dev + int rx = priv->rx_irq - LTQ_DMA_ETOP; + int err; + +- ltq_dma_init_port(DMA_PORT_ETOP); ++ ltq_dma_init_port(DMA_PORT_ETOP, priv->tx_burst_len, rx_burst_len); + + priv->txch.dma.nr = tx; + priv->txch.dma.dev = &priv->pdev->dev; +@@ -676,8 +679,8 @@ ltq_etop_tx(struct sk_buff *skb, struct + return NETDEV_TX_BUSY; + } + +- /* dma needs to start on a 16 byte aligned address */ +- byte_offset = CPHYSADDR(skb->data) % 16; ++ /* dma needs to start on a burst length value aligned address */ ++ byte_offset = CPHYSADDR(skb->data) % (priv->tx_burst_len * 4); + priv->txch.skb[priv->txch.dma.desc] = skb; + + netif_trans_update(dev); +@@ -925,6 +928,18 @@ static int ltq_etop_probe(struct platfor + spin_lock_init(&priv->lock); + SET_NETDEV_DEV(dev, &pdev->dev); + ++ err = device_property_read_u32(&pdev->dev, "lantiq,tx-burst-length", &priv->tx_burst_len); ++ if (err < 0) { ++ dev_err(&pdev->dev, "unable to read tx-burst-length property\n"); ++ return err; ++ } ++ ++ err = device_property_read_u32(&pdev->dev, "lantiq,rx-burst-length", &priv->rx_burst_len); ++ if (err < 0) { ++ dev_err(&pdev->dev, "unable to read rx-burst-length property\n"); ++ return err; ++ } ++ + netif_napi_add(dev, &priv->txch.napi, ltq_etop_poll_tx, 8); + netif_napi_add(dev, &priv->rxch.napi, ltq_etop_poll_rx, 32); + priv->txch.netdev = dev; +--- a/drivers/net/ethernet/lantiq_xrx200.c ++++ b/drivers/net/ethernet/lantiq_xrx200.c +@@ -81,6 +81,9 @@ struct xrx200_priv { + struct net_device *net_dev; + struct device *dev; + ++ int tx_burst_len; ++ int rx_burst_len; ++ + __iomem void *pmac_reg; + }; + +@@ -363,8 +366,8 @@ static netdev_tx_t xrx200_start_xmit(str + if (unlikely(dma_mapping_error(priv->dev, mapping))) + goto err_drop; + +- /* dma needs to start on a 16 byte aligned address */ +- byte_offset = mapping % 16; ++ /* dma needs to start on a burst length value aligned address */ ++ byte_offset = mapping % (priv->tx_burst_len * 4); + + desc->addr = mapping - byte_offset; + /* Make sure the address is written before we give it to HW */ +@@ -465,7 +468,7 @@ static int xrx200_dma_init(struct xrx200 + int ret = 0; + int i; + +- ltq_dma_init_port(DMA_PORT_ETOP); ++ ltq_dma_init_port(DMA_PORT_ETOP, priv->tx_burst_len, rx_burst_len); + + ch_rx->dma.nr = XRX200_DMA_RX; + ch_rx->dma.dev = priv->dev; +@@ -584,6 +587,18 @@ static int xrx200_probe(struct platform_ + if (err) + eth_hw_addr_random(net_dev); + ++ err = device_property_read_u32(dev, "lantiq,tx-burst-length", &priv->tx_burst_len); ++ if (err < 0) { ++ dev_err(dev, "unable to read tx-burst-length property\n"); ++ return err; ++ } ++ ++ err = device_property_read_u32(dev, "lantiq,rx-burst-length", &priv->rx_burst_len); ++ if (err < 0) { ++ dev_err(dev, "unable to read rx-burst-length property\n"); ++ return err; ++ } ++ + /* bring up the dma engine and IP core */ + err = xrx200_dma_init(priv); + if (err) |