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generic: 5.15: mtk_eth_soc: backport fix for hang on link up
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>
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From ef5976ae4e117fae9a61bb3c0f8319a917a425ea Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Mon, 11 Mar 2024 17:43:28 +0000
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Subject: [PATCH] net: mediatek: mtk_eth_soc: release MAC_MCR_FORCE_LINK only when MAC is up
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Clearing bit MAC_MCR_FORCE_LINK which forces the link down too early
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can result in MAC ending up in a broken/blocked state.
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Fix this by handling this bit in the .mac_link_up and .mac_link_down
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calls instead of in .mac_finish.
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Fixes: b8fc9f30821ec ("net: ethernet: mediatek: Add basic PHYLINK support")
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/net/ethernet/mediatek/mtk_eth_soc.c | 7 +++----
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1 file changed, 3 insertions(+), 4 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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@@ -619,8 +619,7 @@ static int mtk_mac_finish(struct phylink
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mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
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mcr_new = mcr_cur;
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mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE |
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- MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK |
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- MAC_MCR_RX_FIFO_CLR_DIS;
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+ MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_RX_FIFO_CLR_DIS;
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/* Only update control register when needed! */
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if (mcr_new != mcr_cur)
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@@ -636,7 +635,7 @@ static void mtk_mac_link_down(struct phy
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phylink_config);
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u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
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- mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
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+ mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK);
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mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
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}
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@@ -745,7 +744,7 @@ static void mtk_mac_link_up(struct phyli
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if (rx_pause)
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mcr |= MAC_MCR_FORCE_RX_FC;
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- mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN;
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+ mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK;
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mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
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}
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@ -387,16 +387,17 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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return;
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err_phy:
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@@ -634,10 +698,13 @@ static void mtk_mac_link_down(struct phy
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@@ -633,10 +697,14 @@ static void mtk_mac_link_down(struct phy
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{
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struct mtk_mac *mac = container_of(config, struct mtk_mac,
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phylink_config);
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- u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
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- mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
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- mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK);
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- mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
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+ if (!mtk_interface_mode_is_xgmii(interface)) {
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+ mtk_m32(mac->hw, MAC_MCR_TX_EN | MAC_MCR_RX_EN, 0, MTK_MAC_MCR(mac->id));
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+ mtk_m32(mac->hw, MAC_MCR_TX_EN | MAC_MCR_RX_EN | MAC_MCR_FORCE_LINK, 0, MTK_MAC_MCR(mac->id));
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+ if (mtk_is_netsys_v3_or_greater(eth))
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+ mtk_m32(mac->hw, MTK_XGMAC_FORCE_LINK(mac->id), 0, MTK_XGMAC_STS(mac->id));
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+ } else if (mac->id != MTK_GMAC1_ID) {
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+ mtk_m32(mac->hw, XMAC_MCR_TRX_DISABLE, XMAC_MCR_TRX_DISABLE, MTK_XMAC_MCR(mac->id));
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@ -404,7 +405,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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}
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static void mtk_set_queue_speed(struct mtk_eth *eth, unsigned int idx,
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@@ -709,13 +776,11 @@ static void mtk_set_queue_speed(struct m
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@@ -708,13 +776,11 @@ static void mtk_set_queue_speed(struct m
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mtk_w32(eth, val, soc->reg_map->qdma.qtx_sch + ofs);
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}
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@ -422,7 +423,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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u32 mcr;
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mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
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@@ -749,6 +814,55 @@ static void mtk_mac_link_up(struct phyli
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@@ -748,6 +814,55 @@ static void mtk_mac_link_up(struct phyli
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mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
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}
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@ -478,7 +479,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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static const struct phylink_mac_ops mtk_phylink_ops = {
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.validate = phylink_generic_validate,
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.mac_select_pcs = mtk_mac_select_pcs,
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@@ -4563,8 +4677,21 @@ static int mtk_add_mac(struct mtk_eth *e
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@@ -4562,8 +4677,21 @@ static int mtk_add_mac(struct mtk_eth *e
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phy_interface_zero(mac->phylink_config.supported_interfaces);
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__set_bit(PHY_INTERFACE_MODE_INTERNAL,
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mac->phylink_config.supported_interfaces);
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@ -500,7 +501,7 @@ Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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phylink = phylink_create(&mac->phylink_config,
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of_fwnode_handle(mac->of_node),
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phy_mode, &mtk_phylink_ops);
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@@ -4757,6 +4884,13 @@ static int mtk_probe(struct platform_dev
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@@ -4756,6 +4884,13 @@ static int mtk_probe(struct platform_dev
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if (err)
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return err;
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