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generic: 5.15: mtk_eth_soc: backport fix for hang on link up

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Backport commit faa5f17fe2 ("kernel: mtk_eth_soc: release
MAC_MCR_FORCE_LINK only when MAC is up") to Linux 5.15 as well.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 33d6ba5045)
This commit is contained in:
Daniel Golle 2024-03-13 18:43:28 +00:00
parent 02272df01c
commit 83e37f71fa
2 changed files with 59 additions and 8 deletions
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50
target/linux/generic/pending-5.15/735-net-mediatek-mtk_eth_soc-release-MAC_MCR_FORCE_LINK-.patch Normal file
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@ -0,0 +1,50 @@
From ef5976ae4e117fae9a61bb3c0f8319a917a425ea Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 11 Mar 2024 17:43:28 +0000
Subject: [PATCH] net: mediatek: mtk_eth_soc: release MAC_MCR_FORCE_LINK only when MAC is up
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Clearing bit MAC_MCR_FORCE_LINK which forces the link down too early
can result in MAC ending up in a broken/blocked state.
Fix this by handling this bit in the .mac_link_up and .mac_link_down
calls instead of in .mac_finish.
Fixes: b8fc9f30821ec ("net: ethernet: mediatek: Add basic PHYLINK support")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -618,8 +618,7 @@ static int mtk_mac_finish(struct phylink
mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
mcr_new = mcr_cur;
mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE |
- MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK |
- MAC_MCR_RX_FIFO_CLR_DIS;
+ MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_RX_FIFO_CLR_DIS;
/* Only update control register when needed! */
if (mcr_new != mcr_cur)
@@ -635,7 +634,7 @@ static void mtk_mac_link_down(struct phy
phylink_config);
u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
- mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
+ mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK);
mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
}
@@ -744,7 +743,7 @@ static void mtk_mac_link_up(struct phyli
if (rx_pause)
mcr |= MAC_MCR_FORCE_RX_FC;
- mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN;
+ mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK;
mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
}

17
target/linux/generic/pending-5.15/737-net-ethernet-mtk_eth_soc-add-paths-and-SerDes-modes-.patch
View File

@ -387,24 +387,25 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
return;
err_phy:
@@ -633,10 +697,13 @@ static void mtk_mac_link_down(struct phy
@@ -632,10 +696,14 @@ static void mtk_mac_link_down(struct phy
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
- u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
- mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
- mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK);
- mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
+ if (!mtk_interface_mode_is_xgmii(interface)) {
+ mtk_m32(mac->hw, MAC_MCR_TX_EN | MAC_MCR_RX_EN, 0, MTK_MAC_MCR(mac->id));
+ mtk_m32(mac->hw, MTK_XGMAC_FORCE_LINK(mac->id), 0, MTK_XGMAC_STS(mac->id));
+ mtk_m32(mac->hw, MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK, 0, MTK_MAC_MCR(mac->id));
+ if (mtk_is_netsys_v3_or_greater(mac->hw))
+ mtk_m32(mac->hw, MTK_XGMAC_FORCE_LINK(mac->id), 0, MTK_XGMAC_STS(mac->id));
+ } else if (mac->id != MTK_GMAC1_ID) {
+ mtk_m32(mac->hw, XMAC_MCR_TRX_DISABLE, XMAC_MCR_TRX_DISABLE, MTK_XMAC_MCR(mac->id));
+ }
}
static void mtk_set_queue_speed(struct mtk_eth *eth, unsigned int idx,
@@ -708,13 +775,11 @@ static void mtk_set_queue_speed(struct m
@@ -707,13 +775,11 @@ static void mtk_set_queue_speed(struct m
mtk_w32(eth, val, soc->reg_map->qdma.qtx_sch + ofs);
}
@ -422,7 +423,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
u32 mcr;
mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
@@ -748,6 +813,55 @@ static void mtk_mac_link_up(struct phyli
@@ -747,6 +813,55 @@ static void mtk_mac_link_up(struct phyli
mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
}
@ -478,7 +479,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
static const struct phylink_mac_ops mtk_phylink_ops = {
.validate = phylink_generic_validate,
.mac_select_pcs = mtk_mac_select_pcs,
@@ -4561,8 +4675,21 @@ static int mtk_add_mac(struct mtk_eth *e
@@ -4560,8 +4675,21 @@ static int mtk_add_mac(struct mtk_eth *e
phy_interface_zero(mac->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_INTERNAL,
mac->phylink_config.supported_interfaces);
@ -500,7 +501,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
phylink = phylink_create(&mac->phylink_config,
of_fwnode_handle(mac->of_node),
phy_mode, &mtk_phylink_ops);
@@ -4755,6 +4882,13 @@ static int mtk_probe(struct platform_dev
@@ -4754,6 +4882,13 @@ static int mtk_probe(struct platform_dev
if (err)
return err;