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d374e0346e
0001-MIPS-lantiq-add-pcie-driver.patch needs to drop
MODULE_SUPPORTED_DEVICE because that macro is gone on newer kernels.
Add checks for copy_{to,from}_user in
0008-MIPS-lantiq-backport-old-timer-code.patch which is now mandatory.
0705-v5.13-net-dsa-lantiq-allow-to-use-all-GPHYs-on-xRX300-and-.patch
get dropped because it's a backport from Linux 5.13.
All other patches are refreshed.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
146 lines
3.9 KiB
Diff
146 lines
3.9 KiB
Diff
From 998ac358019e491217e752bc6dcbb3afb2a6fa3e Mon Sep 17 00:00:00 2001
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From: Aleksander Jan Bajkowski <olek2@wp.pl>
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Date: Sun, 19 Sep 2021 20:24:28 +0200
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Subject: [PATCH] net: lantiq: add support for jumbo frames
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Add support for jumbo frames. Full support for jumbo frames requires
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changes in the DSA switch driver (lantiq_gswip.c).
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Tested on BT Hone Hub 5A.
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Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/lantiq_xrx200.c | 64 +++++++++++++++++++++++++---
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1 file changed, 57 insertions(+), 7 deletions(-)
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--- a/drivers/net/ethernet/lantiq_xrx200.c
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+++ b/drivers/net/ethernet/lantiq_xrx200.c
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@@ -14,13 +14,15 @@
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#include <linux/clk.h>
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#include <linux/delay.h>
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+#include <linux/if_vlan.h>
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+
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#include <linux/of_net.h>
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#include <linux/of_platform.h>
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#include <xway_dma.h>
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/* DMA */
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-#define XRX200_DMA_DATA_LEN 0x600
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+#define XRX200_DMA_DATA_LEN (SZ_64K - 1)
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#define XRX200_DMA_RX 0
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#define XRX200_DMA_TX 1
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@@ -106,7 +108,8 @@ static void xrx200_flush_dma(struct xrx2
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break;
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desc->ctl = LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) |
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- XRX200_DMA_DATA_LEN;
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+ (ch->priv->net_dev->mtu + VLAN_ETH_HLEN +
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+ ETH_FCS_LEN);
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ch->dma.desc++;
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ch->dma.desc %= LTQ_DESC_NUM;
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}
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@@ -154,19 +157,20 @@ static int xrx200_close(struct net_devic
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static int xrx200_alloc_skb(struct xrx200_chan *ch)
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{
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+ int len = ch->priv->net_dev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
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struct sk_buff *skb = ch->skb[ch->dma.desc];
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dma_addr_t mapping;
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int ret = 0;
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ch->skb[ch->dma.desc] = netdev_alloc_skb_ip_align(ch->priv->net_dev,
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- XRX200_DMA_DATA_LEN);
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+ len);
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if (!ch->skb[ch->dma.desc]) {
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ret = -ENOMEM;
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goto skip;
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}
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mapping = dma_map_single(ch->priv->dev, ch->skb[ch->dma.desc]->data,
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- XRX200_DMA_DATA_LEN, DMA_FROM_DEVICE);
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+ len, DMA_FROM_DEVICE);
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if (unlikely(dma_mapping_error(ch->priv->dev, mapping))) {
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dev_kfree_skb_any(ch->skb[ch->dma.desc]);
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ch->skb[ch->dma.desc] = skb;
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@@ -179,8 +183,7 @@ static int xrx200_alloc_skb(struct xrx20
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wmb();
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skip:
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ch->dma.desc_base[ch->dma.desc].ctl =
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- LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) |
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- XRX200_DMA_DATA_LEN;
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+ LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) | len;
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return ret;
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}
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@@ -340,10 +343,57 @@ err_drop:
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return NETDEV_TX_OK;
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}
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+static int
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+xrx200_change_mtu(struct net_device *net_dev, int new_mtu)
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+{
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+ struct xrx200_priv *priv = netdev_priv(net_dev);
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+ struct xrx200_chan *ch_rx = &priv->chan_rx;
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+ int old_mtu = net_dev->mtu;
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+ bool running = false;
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+ struct sk_buff *skb;
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+ int curr_desc;
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+ int ret = 0;
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+
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+ net_dev->mtu = new_mtu;
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+
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+ if (new_mtu <= old_mtu)
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+ return ret;
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+
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+ running = netif_running(net_dev);
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+ if (running) {
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+ napi_disable(&ch_rx->napi);
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+ ltq_dma_close(&ch_rx->dma);
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+ }
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+
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+ xrx200_poll_rx(&ch_rx->napi, LTQ_DESC_NUM);
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+ curr_desc = ch_rx->dma.desc;
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+
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+ for (ch_rx->dma.desc = 0; ch_rx->dma.desc < LTQ_DESC_NUM;
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+ ch_rx->dma.desc++) {
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+ skb = ch_rx->skb[ch_rx->dma.desc];
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+ ret = xrx200_alloc_skb(ch_rx);
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+ if (ret) {
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+ net_dev->mtu = old_mtu;
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+ break;
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+ }
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+ dev_kfree_skb_any(skb);
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+ }
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+
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+ ch_rx->dma.desc = curr_desc;
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+ if (running) {
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+ napi_enable(&ch_rx->napi);
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+ ltq_dma_open(&ch_rx->dma);
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+ ltq_dma_enable_irq(&ch_rx->dma);
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+ }
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+
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+ return ret;
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+}
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+
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static const struct net_device_ops xrx200_netdev_ops = {
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.ndo_open = xrx200_open,
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.ndo_stop = xrx200_close,
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.ndo_start_xmit = xrx200_start_xmit,
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+ .ndo_change_mtu = xrx200_change_mtu,
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.ndo_set_mac_address = eth_mac_addr,
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.ndo_validate_addr = eth_validate_addr,
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};
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@@ -453,7 +503,7 @@ static int xrx200_probe(struct platform_
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net_dev->netdev_ops = &xrx200_netdev_ops;
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SET_NETDEV_DEV(net_dev, dev);
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net_dev->min_mtu = ETH_ZLEN;
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- net_dev->max_mtu = XRX200_DMA_DATA_LEN;
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+ net_dev->max_mtu = XRX200_DMA_DATA_LEN - VLAN_ETH_HLEN - ETH_FCS_LEN;
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/* load the memory ranges */
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priv->pmac_reg = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
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