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6c256218e59e wifi: mt76: dma: use napi_build_skb 679254c50f27 mt7915: add CONFIG_MT76_LEDS to cflags 15b9dd6b1b6a wifi: mt76: mt7915: call mt7915_mcu_set_thermal_throttling() only after init_work 8e5c21fe7c5c wifi: mt76: mt7915: rework mt7915_mcu_set_thermal_throttling 87cb74fe42d9 wifi: mt76: mt7915: rework mt7915_thermal_temp_store() c6f24b83eba5 wifi: mt76: mt7915: add error message in mt7915_thermal_set_cur_throttle_state() 99e96b89ee4d wifi: mt76: mt7915: add chip id condition in mt7915_check_eeprom() 833cd420480f wifi: mt76: mt7921: fix channel switch fail in monitor mode f1f8bae6092d wifi: mt76: mt7921: add ack signal support f47087a6dd62 wifi: mt76: mt7996: fix chainmask calculation in mt7996_set_antenna() 2f3b0acc1588 wifi: mt76: mt7996: update register for CFEND_RATE 7e9540dcbd70 wifi: mt76: mt7996: do not hardcode vht beamform cap a37e427d0959 wifi: mt76: connac: fix POWER_CTRL command name typo 98aa346042bd wifi: mt76: mt7915: remove BW160 and BW80+80 support 94fed6a43541 wifi: mt76: mt7921: fix invalid remain_on_channel duration 3c162384d80a wifi: mt76: introduce mt76_queue_is_wed_rx utility routine a409a9454587 wifi: mt76: mt7915: fix memory leak in mt7915_mcu_exit 8b27ecd3a684 wifi: mt76: mt7996: fix memory leak in mt7996_mcu_exit 683760461dd0 wifi: mt76: dma: free rx_head in mt76_dma_rx_cleanup 0c750cf08f85 wifi: mt76: dma: fix memory leak running mt76_dma_tx_cleanup 5de9ae29bea2 wifi: mt76: mt7915: avoid mcu_restart function pointer dad96dd3e62d wifi: mt76: mt7603: avoid mcu_restart function pointer 19d36dd9c8ea wifi: mt76: mt7615: avoid mcu_restart function pointer 6fe2c2383d3d wifi: mt76: mt7921: avoid mcu_restart function pointer 9df89143bf71 wifi: mt76: mt7915: get rid of wed rx_buf_ring page_frag_cache 8d51d11760cb wifi: mt76: fix switch default case in mt7996_reverse_frag0_hdr_trans 0d8057dbd51c wifi: mt76: mt7921u: add support for Comfast CF-952AX ddbf4e933d54 wifi: mt76: mt7915: set sku initial value to zero 06a8904e954e wifi: mt76: mt7915: wed: enable red per-band token drop 724a337caef9 wifi: mt76: mt7915: fix WED TxS reporting 747ca943a5bb wifi: mt76: add flexible polling wait-interval support 133d7859977a wifi: mt76: mt7921: reduce polling time in pmctrl 5fe319a0550e wifi: mt76: add memory barrier to SDIO queue kick 822f060b9d19 wifi: mt76: mt7921: fix rx filter incorrect by drv/fw inconsistent c6794954a723 wifi: mt76: mt7915: fix memory leak in mt7915_mmio_wed_init_rx_buf 9686cd7cc65c wifi: mt76: switch to page_pool allocator 04da4eaa8235 wifi: mt76: enable page_pool stats 1af4a911ebcb wifi: mt76: mt7915: release rxwi in mt7915_wed_release_rx_buf e8c10835cf06 wifi: mt76: fix compile error without CONFIG_PAGE_POOL_STATS 0cf0ede7cc42 net: ethernet: mtk_wed: add reset to rx_ring_setup callback 715b3ed9708a net: ethernet: mtk_wed: add reset to tx_ring_setup callback 9107381d0ff3 wifi: mt76: mt7921: fix error code of return in mt7921_acpi_read 36d2a5bf7802 wifi: mt76: mt7996: rely on mt76_connac2_mac_tx_rate_val c67f57d2cda2 wifi: mt76: dma: add reset to mt76_dma_wed_setup signature 3dace36e2941 wifi: mt76: dma: reset wed queues in mt76_dma_rx_reset 4b229d2da562 wifi: mt76: mt7915: add mt7915 wed reset callbacks f83958376085 wifi: mt76: mt7915: complete wed reset support 321edbb414dc wifi: mt76: mt7996: rely on mt76_connac_txp_common structure bdb7dc38a6d1 wifi: mt76: mt7996: rely on mt76_connac_txp_skb_unmap 8688756305c6 wifi: mt76: mt7996: rely on mt76_connac_tx_complete_skb fbf986dbd4c0 wifi: mt76: mt7996: rely on mt76_connac2_mac_decode_he_radiotap adc556cbce37 wifi: mt76: mt7996: avoid mcu_restart function pointer 5eb4e2303be4 wifi: mt76: remove __mt76_mcu_restart macro e7a61c5f70f5 wifi: mt76: add EHT phy type b375845abc10 wifi: mt76: connac: add CMD_CBW_320MHZ 68b17a243332 wifi: mt76: connac: add helpers for EHT capability 02ec1f61b3a2 wifi: mt76: connac: add cmd id related to EHT support 9209294cd81b wifi: mt76: increase wcid size to 1088 5e85136c9b2f wifi: mt76: add EHT rate stats for ethtool a171f672fdeb wifi: mt76: mt7996: add variants support eda8fd62c105 wifi: mt76: mt7996: add helpers for wtbl and interface limit 4a5a9f4cdc3b wifi: mt76: mt7996: rework capability init 06b73c155680 wifi: mt76: mt7996: add EHT capability init ae71a1b8294f wifi: mt76: mt7996: add support for EHT rate report 65bdfae2991d wifi: mt76: mt7996: enable EHT support in firmware b2360d59747c wifi: mt76: mt7996: add EHT beamforming support Signed-off-by: Felix Fietkau <nbd@nbd.name>
95 lines
2.7 KiB
Diff
95 lines
2.7 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 3 Nov 2022 12:38:49 +0100
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Subject: [PATCH] net: ethernet: mtk_eth_soc: work around issue with sending
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small fragments
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When lots of frames are sent with a number of very small fragments, an
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internal FIFO can overflow, causing the DMA engine to lock up lock up and
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transmit attempts time out.
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Fix this on MT7986 by increasing the reserved FIFO space.
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Fix this on older chips by detecting the presence of small fragments and use
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skb_gso_segment + skb_linearize to deal with them.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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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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@@ -1402,12 +1402,28 @@ static void mtk_wake_queue(struct mtk_et
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}
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}
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+static bool mtk_skb_has_small_frag(struct sk_buff *skb)
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+{
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+ int min_size = 16;
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+ int i;
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+
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+ if (skb_headlen(skb) < min_size)
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+ return true;
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+
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+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
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+ if (skb_frag_size(&skb_shinfo(skb)->frags[i]) < min_size)
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+ return true;
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+
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+ return false;
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+}
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+
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static netdev_tx_t 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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struct mtk_eth *eth = mac->hw;
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struct mtk_tx_ring *ring = ð->tx_ring;
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struct net_device_stats *stats = &dev->stats;
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+ struct sk_buff *segs, *next;
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bool gso = false;
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int tx_num;
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@@ -1429,6 +1445,18 @@ static netdev_tx_t mtk_start_xmit(struct
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return NETDEV_TX_BUSY;
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}
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+ if (!MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2) &&
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+ skb_is_gso(skb) && mtk_skb_has_small_frag(skb)) {
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+ segs = skb_gso_segment(skb, dev->features & ~NETIF_F_ALL_TSO);
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+ if (IS_ERR(segs))
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+ goto drop;
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+
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+ if (segs) {
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+ consume_skb(skb);
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+ skb = segs;
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+ }
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+ }
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+
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/* TSO: fill MSS info in tcp checksum field */
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if (skb_is_gso(skb)) {
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if (skb_cow_head(skb, 0)) {
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@@ -1444,8 +1472,14 @@ static netdev_tx_t mtk_start_xmit(struct
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}
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}
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- if (mtk_tx_map(skb, dev, tx_num, ring, gso) < 0)
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- goto drop;
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+ skb_list_walk_safe(skb, skb, next) {
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+ if ((!MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2) &&
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+ mtk_skb_has_small_frag(skb) && skb_linearize(skb)) ||
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+ mtk_tx_map(skb, dev, tx_num, ring, gso) < 0) {
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+ stats->tx_dropped++;
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+ dev_kfree_skb_any(skb);
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+ }
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+ }
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if (unlikely(atomic_read(&ring->free_count) <= ring->thresh))
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netif_tx_stop_all_queues(dev);
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
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@@ -258,7 +258,7 @@
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#define MTK_CHK_DDONE_EN BIT(28)
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#define MTK_DMAD_WR_WDONE BIT(26)
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#define MTK_WCOMP_EN BIT(24)
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-#define MTK_RESV_BUF (0x40 << 16)
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+#define MTK_RESV_BUF (0x80 << 16)
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#define MTK_MUTLI_CNT (0x4 << 12)
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#define MTK_LEAKY_BUCKET_EN BIT(11)
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