85 lines
2.3 KiB
Diff
85 lines
2.3 KiB
Diff
From afc838dde560ab584d3fb0e4b011e4a6770dab3d Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Tue, 29 Mar 2016 16:41:07 +0200
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Subject: [PATCH 065/102] net: mediatek: fix stop and wakeup of queue
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The driver supports 2 MACs. Both run on the same DMA ring. If we go
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above/below the TX rings thershold value, we always need to wake/stop
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the queu of both devices. Not doing to can cause TX stalls and packet
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drops on one of the devices.
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Signed-off-by: John Crispin <blogic@openwrt.org>
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---
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drivers/net/ethernet/mediatek/mtk_eth_soc.c | 37 +++++++++++++++++++--------
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1 file changed, 27 insertions(+), 10 deletions(-)
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@@ -684,6 +684,28 @@ static inline int mtk_cal_txd_req(struct
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return nfrags;
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}
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+static void mtk_wake_queue(struct mtk_eth *eth)
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+{
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+ int i;
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+
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+ for (i = 0; i < MTK_MAC_COUNT; i++) {
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+ if (!eth->netdev[i])
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+ continue;
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+ netif_wake_queue(eth->netdev[i]);
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+ }
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+}
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+
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+static void mtk_stop_queue(struct mtk_eth *eth)
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+{
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+ int i;
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+
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+ for (i = 0; i < MTK_MAC_COUNT; i++) {
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+ if (!eth->netdev[i])
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+ continue;
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+ netif_stop_queue(eth->netdev[i]);
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+ }
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+}
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+
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static int mtk_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct mtk_mac *mac = netdev_priv(dev);
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@@ -695,7 +717,7 @@ static int mtk_start_xmit(struct sk_buff
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tx_num = mtk_cal_txd_req(skb);
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if (unlikely(atomic_read(&ring->free_count) <= tx_num)) {
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- netif_stop_queue(dev);
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+ mtk_stop_queue(eth);
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netif_err(eth, tx_queued, dev,
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"Tx Ring full when queue awake!\n");
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return NETDEV_TX_BUSY;
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@@ -720,10 +742,10 @@ static int mtk_start_xmit(struct sk_buff
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goto drop;
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if (unlikely(atomic_read(&ring->free_count) <= ring->thresh)) {
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- netif_stop_queue(dev);
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+ mtk_stop_queue(eth);
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if (unlikely(atomic_read(&ring->free_count) >
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ring->thresh))
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- netif_wake_queue(dev);
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+ mtk_wake_queue(eth);
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}
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return NETDEV_TX_OK;
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@@ -897,13 +919,8 @@ static int mtk_poll_tx(struct mtk_eth *e
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if (!total)
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return 0;
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- for (i = 0; i < MTK_MAC_COUNT; i++) {
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- if (!eth->netdev[i] ||
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- unlikely(!netif_queue_stopped(eth->netdev[i])))
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- continue;
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- if (atomic_read(&ring->free_count) > ring->thresh)
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- netif_wake_queue(eth->netdev[i]);
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- }
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+ if (atomic_read(&ring->free_count) > ring->thresh)
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+ mtk_wake_queue(eth);
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return total;
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}
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