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kernel: fix mtk_eth_soc throughput regressions on gigabit PHY ports

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Fixes issues on MT7621 and MT7623 switch ports, and PHY ports on all SoC

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2023-03-29 11:38:30 +02:00
parent 1c552eb44d
commit 7472476aef
10 changed files with 100 additions and 27 deletions
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31
target/linux/generic/backport-5.15/730-18-v6.3-net-ethernet-mtk_eth_soc-fix-tx-throughput-regressio.patch Normal file
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@@ -0,0 +1,31 @@
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 24 Mar 2023 14:56:58 +0100
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix tx throughput regression with
direct 1G links
Using the QDMA tx scheduler to throttle tx to line speed works fine for
switch ports, but apparently caused a regression on non-switch ports.
Based on a number of tests, it seems that this throttling can be safely
dropped without re-introducing the issues on switch ports that the
tx scheduling changes resolved.
Link: https://lore.kernel.org/netdev/trinity-92c3826f-c2c8-40af-8339-bc6d0d3ffea4-1678213958520@3c-app-gmx-bs16/
Fixes: f63959c7eec3 ("net: ethernet: mtk_eth_soc: implement multi-queue support for per-port queues")
Reported-by: Frank Wunderlich <frank-w@public-files.de>
Reported-by: Daniel Golle <daniel@makrotopia.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -676,8 +676,6 @@ static void mtk_mac_link_up(struct phyli
break;
}
- mtk_set_queue_speed(mac->hw, mac->id, speed);
-
/* Configure duplex */
if (duplex == DUPLEX_FULL)
mcr |= MAC_MCR_FORCE_DPX;

4
target/linux/generic/backport-5.15/733-v6.3-18-net-ethernet-mtk_eth_soc-add-support-for-MT7981.patch
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@@ -34,7 +34,7 @@
mtk_eth_path_name(path), __func__, updated);
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -4757,6 +4757,26 @@ static const struct mtk_soc_data mt7629_
@@ -4755,6 +4755,26 @@ static const struct mtk_soc_data mt7629_
},
};
@@ -61,7 +61,7 @@
static const struct mtk_soc_data mt7986_data = {
.reg_map = &mt7986_reg_map,
.ana_rgc3 = 0x128,
@@ -4799,6 +4819,7 @@ const struct of_device_id of_mtk_match[]
@@ -4797,6 +4817,7 @@ const struct of_device_id of_mtk_match[]
{ .compatible = "mediatek,mt7622-eth", .data = &mt7622_data},
{ .compatible = "mediatek,mt7623-eth", .data = &mt7623_data},
{ .compatible = "mediatek,mt7629-eth", .data = &mt7629_data},

4
target/linux/generic/backport-5.15/733-v6.3-19-net-ethernet-mtk_eth_soc-set-MDIO-bus-clock-frequenc.patch
View File

@@ -21,7 +21,7 @@ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -704,8 +704,10 @@ static const struct phylink_mac_ops mtk_
@@ -702,8 +702,10 @@ static const struct phylink_mac_ops mtk_
static int mtk_mdio_init(struct mtk_eth *eth)
{
@@ -32,7 +32,7 @@ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
mii_np = of_get_child_by_name(eth->dev->of_node, "mdio-bus");
if (!mii_np) {
@@ -731,6 +733,25 @@ static int mtk_mdio_init(struct mtk_eth
@@ -729,6 +731,25 @@ static int mtk_mdio_init(struct mtk_eth
eth->mii_bus->parent = eth->dev;
snprintf(eth->mii_bus->id, MII_BUS_ID_SIZE, "%pOFn", mii_np);

10
target/linux/generic/backport-5.15/733-v6.3-20-net-ethernet-mtk_eth_soc-switch-to-external-PCS-driv.patch
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@@ -60,7 +60,7 @@ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
}
return NULL;
@@ -3979,8 +3980,17 @@ static int mtk_unreg_dev(struct mtk_eth
@@ -3977,8 +3978,17 @@ static int mtk_unreg_dev(struct mtk_eth
return 0;
}
@@ -78,7 +78,7 @@ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
mtk_unreg_dev(eth);
mtk_free_dev(eth);
cancel_work_sync(&eth->pending_work);
@@ -4410,6 +4420,36 @@ void mtk_eth_set_dma_device(struct mtk_e
@@ -4408,6 +4418,36 @@ void mtk_eth_set_dma_device(struct mtk_e
rtnl_unlock();
}
@@ -115,7 +115,7 @@ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
static int mtk_probe(struct platform_device *pdev)
{
struct resource *res = NULL;
@@ -4473,13 +4513,7 @@ static int mtk_probe(struct platform_dev
@@ -4471,13 +4511,7 @@ static int mtk_probe(struct platform_dev
}
if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) {
@@ -130,7 +130,7 @@ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
if (err)
return err;
@@ -4490,14 +4524,17 @@ static int mtk_probe(struct platform_dev
@@ -4488,14 +4522,17 @@ static int mtk_probe(struct platform_dev
"mediatek,pctl");
if (IS_ERR(eth->pctl)) {
dev_err(&pdev->dev, "no pctl regmap found\n");
@@ -151,7 +151,7 @@ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
}
if (eth->soc->offload_version) {
@@ -4657,6 +4694,8 @@ err_deinit_hw:
@@ -4655,6 +4692,8 @@ err_deinit_hw:
mtk_hw_deinit(eth);
err_wed_exit:
mtk_wed_exit();

6
target/linux/generic/pending-5.15/702-net-ethernet-mtk_eth_soc-enable-threaded-NAPI.patch
View File

@@ -10,7 +10,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2994,8 +2994,8 @@ static irqreturn_t mtk_handle_irq_rx(int
@@ -2992,8 +2992,8 @@ static irqreturn_t mtk_handle_irq_rx(int
eth->rx_events++;
if (likely(napi_schedule_prep(&eth->rx_napi))) {
@@ -20,7 +20,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
}
return IRQ_HANDLED;
@@ -3007,8 +3007,8 @@ static irqreturn_t mtk_handle_irq_tx(int
@@ -3005,8 +3005,8 @@ static irqreturn_t mtk_handle_irq_tx(int
eth->tx_events++;
if (likely(napi_schedule_prep(&eth->tx_napi))) {
@@ -30,7 +30,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
}
return IRQ_HANDLED;
@@ -4675,6 +4675,8 @@ static int mtk_probe(struct platform_dev
@@ -4673,6 +4673,8 @@ static int mtk_probe(struct platform_dev
* for NAPI to work
*/
init_dummy_netdev(&eth->dummy_dev);

8
target/linux/generic/pending-5.15/731-net-ethernet-mediatek-ppe-add-support-for-flow-accou.patch
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@@ -53,7 +53,7 @@ v2: fix wrong variable name in return value check spotted by Denis Kirjanov
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -4644,8 +4644,8 @@ static int mtk_probe(struct platform_dev
@@ -4642,8 +4642,8 @@ static int mtk_probe(struct platform_dev
for (i = 0; i < num_ppe; i++) {
u32 ppe_addr = eth->soc->reg_map->ppe_base + i * 0x400;
@@ -64,7 +64,7 @@ v2: fix wrong variable name in return value check spotted by Denis Kirjanov
if (!eth->ppe[i]) {
err = -ENOMEM;
goto err_free_dev;
@@ -4772,6 +4772,7 @@ static const struct mtk_soc_data mt7622_
@@ -4770,6 +4770,7 @@ static const struct mtk_soc_data mt7622_
.required_pctl = false,
.offload_version = 2,
.hash_offset = 2,
@@ -72,7 +72,7 @@ v2: fix wrong variable name in return value check spotted by Denis Kirjanov
.foe_entry_size = sizeof(struct mtk_foe_entry) - 16,
.txrx = {
.txd_size = sizeof(struct mtk_tx_dma),
@@ -4809,6 +4810,7 @@ static const struct mtk_soc_data mt7629_
@@ -4807,6 +4808,7 @@ static const struct mtk_soc_data mt7629_
.hw_features = MTK_HW_FEATURES,
.required_clks = MT7629_CLKS_BITMAP,
.required_pctl = false,
@@ -80,7 +80,7 @@ v2: fix wrong variable name in return value check spotted by Denis Kirjanov
.txrx = {
.txd_size = sizeof(struct mtk_tx_dma),
.rxd_size = sizeof(struct mtk_rx_dma),
@@ -4829,6 +4831,7 @@ static const struct mtk_soc_data mt7981_
@@ -4827,6 +4829,7 @@ static const struct mtk_soc_data mt7981_
.offload_version = 2,
.hash_offset = 4,
.foe_entry_size = sizeof(struct mtk_foe_entry),

14
target/linux/generic/pending-5.15/732-00-net-ethernet-mtk_eth_soc-drop-generic-vlan-rx-offloa.patch
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@@ -17,7 +17,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1852,9 +1852,7 @@ static int mtk_poll_rx(struct napi_struc
@@ -1850,9 +1850,7 @@ static int mtk_poll_rx(struct napi_struc
while (done < budget) {
unsigned int pktlen, *rxdcsum;
@@ -27,7 +27,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
dma_addr_t dma_addr;
u32 hash, reason;
int mac = 0;
@@ -1989,36 +1987,21 @@ static int mtk_poll_rx(struct napi_struc
@@ -1987,36 +1985,21 @@ static int mtk_poll_rx(struct napi_struc
skb_checksum_none_assert(skb);
skb->protocol = eth_type_trans(skb, netdev);
@@ -70,7 +70,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
skb_record_rx_queue(skb, 0);
napi_gro_receive(napi, skb);
@@ -2833,29 +2816,11 @@ static netdev_features_t mtk_fix_feature
@@ -2831,29 +2814,11 @@ static netdev_features_t mtk_fix_feature
static int mtk_set_features(struct net_device *dev, netdev_features_t features)
{
@@ -100,7 +100,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
return 0;
}
@@ -3169,30 +3134,6 @@ static int mtk_open(struct net_device *d
@@ -3167,30 +3132,6 @@ static int mtk_open(struct net_device *d
struct mtk_eth *eth = mac->hw;
int i, err;
@@ -131,7 +131,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
err = phylink_of_phy_connect(mac->phylink, mac->of_node, 0);
if (err) {
netdev_err(dev, "%s: could not attach PHY: %d\n", __func__,
@@ -3233,6 +3174,35 @@ static int mtk_open(struct net_device *d
@@ -3231,6 +3172,35 @@ static int mtk_open(struct net_device *d
phylink_start(mac->phylink);
netif_tx_start_all_queues(dev);
@@ -167,7 +167,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
return 0;
}
@@ -3717,10 +3687,9 @@ static int mtk_hw_init(struct mtk_eth *e
@@ -3715,10 +3685,9 @@ static int mtk_hw_init(struct mtk_eth *e
if (!MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
val = mtk_r32(eth, MTK_CDMP_IG_CTRL);
mtk_w32(eth, val | MTK_CDMP_STAG_EN, MTK_CDMP_IG_CTRL);
@@ -180,7 +180,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/* set interrupt delays based on current Net DIM sample */
mtk_dim_rx(&eth->rx_dim.work);
@@ -4367,7 +4336,7 @@ static int mtk_add_mac(struct mtk_eth *e
@@ -4365,7 +4334,7 @@ static int mtk_add_mac(struct mtk_eth *e
eth->netdev[id]->hw_features |= NETIF_F_LRO;
eth->netdev[id]->vlan_features = eth->soc->hw_features &

6
target/linux/generic/pending-5.15/732-01-net-ethernet-mtk_eth_soc-work-around-issue-with-send.patch
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@@ -16,7 +16,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1425,12 +1425,28 @@ static void mtk_wake_queue(struct mtk_et
@@ -1423,12 +1423,28 @@ static void mtk_wake_queue(struct mtk_et
}
}
@@ -45,7 +45,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
bool gso = false;
int tx_num;
@@ -1452,6 +1468,18 @@ static netdev_tx_t mtk_start_xmit(struct
@@ -1450,6 +1466,18 @@ static netdev_tx_t mtk_start_xmit(struct
return NETDEV_TX_BUSY;
}
@@ -64,7 +64,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/* TSO: fill MSS info in tcp checksum field */
if (skb_is_gso(skb)) {
if (skb_cow_head(skb, 0)) {
@@ -1467,8 +1495,14 @@ static netdev_tx_t mtk_start_xmit(struct
@@ -1465,8 +1493,14 @@ static netdev_tx_t mtk_start_xmit(struct
}
}

42
target/linux/generic/pending-5.15/732-03-net-ethernet-mtk_eth_soc-fix-remaining-throughput-re.patch Normal file
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@@ -0,0 +1,42 @@
From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 29 Mar 2023 16:02:54 +0200
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix remaining throughput
regression
Based on further tests, it seems that the QDMA shaper is not able to
perform shaping close to the MAC link rate without throughput loss.
This cannot be compensated by increasing the shaping rate, so it seems
to be an internal limit.
Fix the remaining throughput regression by detecting that condition and
limiting shaping to ports with lower link speed.
This patch intentionally ignores link speed gain from TRGMII, because
even on such links, shaping to 1000 Mbit/s incurs some throughput
degradation.
Fixes: f63959c7eec3 ("net: ethernet: mtk_eth_soc: implement multi-queue support for per-port queues")
Reported-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -667,6 +667,7 @@ static void mtk_mac_link_up(struct phyli
MAC_MCR_FORCE_RX_FC);
/* Configure speed */
+ mac->speed = speed;
switch (speed) {
case SPEED_2500:
case SPEED_1000:
@@ -3145,6 +3146,9 @@ found:
if (dp->index >= MTK_QDMA_NUM_QUEUES)
return NOTIFY_DONE;
+ if (mac->speed > 0 && mac->speed <= s.base.speed)
+ s.base.speed = 0;
+
mtk_set_queue_speed(eth, dp->index + 3, s.base.speed);
return NOTIFY_DONE;

2
target/linux/mediatek/patches-5.15/703-v5.17-net-ethernet-mtk_eth_soc-implement-Clause-45-MDIO-ac.patch
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@@ -103,7 +103,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
ret = mtk_mdio_busy_wait(eth);
if (ret < 0)
@@ -730,6 +773,7 @@ static int mtk_mdio_init(struct mtk_eth
@@ -729,6 +772,7 @@ static int mtk_mdio_init(struct mtk_eth
eth->mii_bus->name = "mdio";
eth->mii_bus->read = mtk_mdio_read;
eth->mii_bus->write = mtk_mdio_write;