openwrt/target/linux/generic/backport-6.6/771-v6.7-02-net-stmmac-move-TX-timer-arm-after-DMA-enable.patch
John Audia 92eb867873 kernel: bump 6.6 to 6.6.60
Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.60

Removed upstreamed:
	generic/backport-6.6/409-mtd-spi-nor-winbond-fix-w25q128-regression.patch

All other patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.60&id=27a58a19bd20a7afe369da2ce6d4ebea70768acd

Build system: x86/64
Build-tested: x86/64/AMD Cezanne, flogic/glinet_gl-mt6000, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3
Run-tested: x86/64/AMD Cezanne, flogic/glinet_gl-mt6000, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3

Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/16892
Signed-off-by: Nick Hainke <vincent@systemli.org>
(cherry picked from commit 85844cfc5c)
2024-11-10 17:09:14 +01:00

101 lines
3.8 KiB
Diff

From a594166387fe08e6f5a32130c400249a35b298f9 Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Wed, 18 Oct 2023 14:35:49 +0200
Subject: [PATCH 2/3] net: stmmac: move TX timer arm after DMA enable
Move TX timer arm call after DMA interrupt is enabled again.
The TX timer arm function changed logic and now is skipped if a napi is
already scheduled. By moving the TX timer arm call after DMA is enabled,
we permit to correctly skip if a DMA interrupt has been fired and a napi
has been scheduled again.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 22 +++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2536,9 +2536,13 @@ static void stmmac_bump_dma_threshold(st
* @priv: driver private structure
* @budget: napi budget limiting this functions packet handling
* @queue: TX queue index
+ * @pending_packets: signal to arm the TX coal timer
* Description: it reclaims the transmit resources after transmission completes.
+ * If some packets still needs to be handled, due to TX coalesce, set
+ * pending_packets to true to make NAPI arm the TX coal timer.
*/
-static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue)
+static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue,
+ bool *pending_packets)
{
struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
struct stmmac_txq_stats *txq_stats = &priv->xstats.txq_stats[queue];
@@ -2698,7 +2702,7 @@ static int stmmac_tx_clean(struct stmmac
/* We still have pending packets, let's call for a new scheduling */
if (tx_q->dirty_tx != tx_q->cur_tx)
- stmmac_tx_timer_arm(priv, queue);
+ *pending_packets = true;
u64_stats_update_begin(&txq_stats->napi_syncp);
u64_stats_add(&txq_stats->napi.tx_packets, tx_packets);
@@ -5602,6 +5606,7 @@ static int stmmac_napi_poll_tx(struct na
container_of(napi, struct stmmac_channel, tx_napi);
struct stmmac_priv *priv = ch->priv_data;
struct stmmac_txq_stats *txq_stats;
+ bool pending_packets = false;
u32 chan = ch->index;
int work_done;
@@ -5610,7 +5615,7 @@ static int stmmac_napi_poll_tx(struct na
u64_stats_inc(&txq_stats->napi.poll);
u64_stats_update_end(&txq_stats->napi_syncp);
- work_done = stmmac_tx_clean(priv, budget, chan);
+ work_done = stmmac_tx_clean(priv, budget, chan, &pending_packets);
work_done = min(work_done, budget);
if (work_done < budget && napi_complete_done(napi, work_done)) {
@@ -5621,6 +5626,10 @@ static int stmmac_napi_poll_tx(struct na
spin_unlock_irqrestore(&ch->lock, flags);
}
+ /* TX still have packet to handle, check if we need to arm tx timer */
+ if (pending_packets)
+ stmmac_tx_timer_arm(priv, chan);
+
return work_done;
}
@@ -5629,6 +5638,7 @@ static int stmmac_napi_poll_rxtx(struct
struct stmmac_channel *ch =
container_of(napi, struct stmmac_channel, rxtx_napi);
struct stmmac_priv *priv = ch->priv_data;
+ bool tx_pending_packets = false;
int rx_done, tx_done, rxtx_done;
struct stmmac_rxq_stats *rxq_stats;
struct stmmac_txq_stats *txq_stats;
@@ -5644,7 +5654,7 @@ static int stmmac_napi_poll_rxtx(struct
u64_stats_inc(&txq_stats->napi.poll);
u64_stats_update_end(&txq_stats->napi_syncp);
- tx_done = stmmac_tx_clean(priv, budget, chan);
+ tx_done = stmmac_tx_clean(priv, budget, chan, &tx_pending_packets);
tx_done = min(tx_done, budget);
rx_done = stmmac_rx_zc(priv, budget, chan);
@@ -5669,6 +5679,10 @@ static int stmmac_napi_poll_rxtx(struct
spin_unlock_irqrestore(&ch->lock, flags);
}
+ /* TX still have packet to handle, check if we need to arm tx timer */
+ if (tx_pending_packets)
+ stmmac_tx_timer_arm(priv, chan);
+
return min(rxtx_done, budget - 1);
}