diff options
Diffstat (limited to 'target/linux/lantiq/patches-5.10/0702-v5.16-net-lantiq-add-support-for-jumbo-frames.patch')
| -rw-r--r-- | target/linux/lantiq/patches-5.10/0702-v5.16-net-lantiq-add-support-for-jumbo-frames.patch | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-5.10/0702-v5.16-net-lantiq-add-support-for-jumbo-frames.patch b/target/linux/lantiq/patches-5.10/0702-v5.16-net-lantiq-add-support-for-jumbo-frames.patch new file mode 100644 index 0000000000..5bbf752dba --- /dev/null +++ b/target/linux/lantiq/patches-5.10/0702-v5.16-net-lantiq-add-support-for-jumbo-frames.patch @@ -0,0 +1,145 @@ +From 998ac358019e491217e752bc6dcbb3afb2a6fa3e Mon Sep 17 00:00:00 2001 +From: Aleksander Jan Bajkowski <olek2@wp.pl> +Date: Sun, 19 Sep 2021 20:24:28 +0200 +Subject: [PATCH] net: lantiq: add support for jumbo frames + +Add support for jumbo frames. Full support for jumbo frames requires +changes in the DSA switch driver (lantiq_gswip.c). + +Tested on BT Hone Hub 5A. + +Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/ethernet/lantiq_xrx200.c | 64 +++++++++++++++++++++++++--- + 1 file changed, 57 insertions(+), 7 deletions(-) + +--- a/drivers/net/ethernet/lantiq_xrx200.c ++++ b/drivers/net/ethernet/lantiq_xrx200.c +@@ -14,13 +14,15 @@ + #include <linux/clk.h> + #include <linux/delay.h> + ++#include <linux/if_vlan.h> ++ + #include <linux/of_net.h> + #include <linux/of_platform.h> + + #include <xway_dma.h> + + /* DMA */ +-#define XRX200_DMA_DATA_LEN 0x600 ++#define XRX200_DMA_DATA_LEN (SZ_64K - 1) + #define XRX200_DMA_RX 0 + #define XRX200_DMA_TX 1 + +@@ -106,7 +108,8 @@ static void xrx200_flush_dma(struct xrx2 + break; + + desc->ctl = LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | +- XRX200_DMA_DATA_LEN; ++ (ch->priv->net_dev->mtu + VLAN_ETH_HLEN + ++ ETH_FCS_LEN); + ch->dma.desc++; + ch->dma.desc %= LTQ_DESC_NUM; + } +@@ -154,19 +157,20 @@ static int xrx200_close(struct net_devic + + static int xrx200_alloc_skb(struct xrx200_chan *ch) + { ++ int len = ch->priv->net_dev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN; + struct sk_buff *skb = ch->skb[ch->dma.desc]; + dma_addr_t mapping; + int ret = 0; + + ch->skb[ch->dma.desc] = netdev_alloc_skb_ip_align(ch->priv->net_dev, +- XRX200_DMA_DATA_LEN); ++ len); + if (!ch->skb[ch->dma.desc]) { + ret = -ENOMEM; + goto skip; + } + + mapping = dma_map_single(ch->priv->dev, ch->skb[ch->dma.desc]->data, +- XRX200_DMA_DATA_LEN, DMA_FROM_DEVICE); ++ len, DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(ch->priv->dev, mapping))) { + dev_kfree_skb_any(ch->skb[ch->dma.desc]); + ch->skb[ch->dma.desc] = skb; +@@ -179,8 +183,7 @@ static int xrx200_alloc_skb(struct xrx20 + wmb(); + skip: + ch->dma.desc_base[ch->dma.desc].ctl = +- LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | +- XRX200_DMA_DATA_LEN; ++ LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | len; + + return ret; + } +@@ -340,10 +343,57 @@ err_drop: + return NETDEV_TX_OK; + } + ++static int ++xrx200_change_mtu(struct net_device *net_dev, int new_mtu) ++{ ++ struct xrx200_priv *priv = netdev_priv(net_dev); ++ struct xrx200_chan *ch_rx = &priv->chan_rx; ++ int old_mtu = net_dev->mtu; ++ bool running = false; ++ struct sk_buff *skb; ++ int curr_desc; ++ int ret = 0; ++ ++ net_dev->mtu = new_mtu; ++ ++ if (new_mtu <= old_mtu) ++ return ret; ++ ++ running = netif_running(net_dev); ++ if (running) { ++ napi_disable(&ch_rx->napi); ++ ltq_dma_close(&ch_rx->dma); ++ } ++ ++ xrx200_poll_rx(&ch_rx->napi, LTQ_DESC_NUM); ++ curr_desc = ch_rx->dma.desc; ++ ++ for (ch_rx->dma.desc = 0; ch_rx->dma.desc < LTQ_DESC_NUM; ++ ch_rx->dma.desc++) { ++ skb = ch_rx->skb[ch_rx->dma.desc]; ++ ret = xrx200_alloc_skb(ch_rx); ++ if (ret) { ++ net_dev->mtu = old_mtu; ++ break; ++ } ++ dev_kfree_skb_any(skb); ++ } ++ ++ ch_rx->dma.desc = curr_desc; ++ if (running) { ++ napi_enable(&ch_rx->napi); ++ ltq_dma_open(&ch_rx->dma); ++ ltq_dma_enable_irq(&ch_rx->dma); ++ } ++ ++ return ret; ++} ++ + static const struct net_device_ops xrx200_netdev_ops = { + .ndo_open = xrx200_open, + .ndo_stop = xrx200_close, + .ndo_start_xmit = xrx200_start_xmit, ++ .ndo_change_mtu = xrx200_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, + }; +@@ -454,7 +504,7 @@ static int xrx200_probe(struct platform_ + net_dev->netdev_ops = &xrx200_netdev_ops; + SET_NETDEV_DEV(net_dev, dev); + net_dev->min_mtu = ETH_ZLEN; +- net_dev->max_mtu = XRX200_DMA_DATA_LEN; ++ net_dev->max_mtu = XRX200_DMA_DATA_LEN - VLAN_ETH_HLEN - ETH_FCS_LEN; + + /* load the memory ranges */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |