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From:   Felix Fietkau <nbd@nbd.name>
To:     netdev@vger.kernel.org, John Crispin <john@phrozen.org>,
        Sean Wang <sean.wang@mediatek.com>,
        Mark Lee <Mark-MC.Lee@mediatek.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Matthias Brugger <matthias.bgg@gmail.com>
Cc:     Vladimir Oltean <olteanv@gmail.com>,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH net-next v2 03/12] net: ethernet: mtk_eth_soc: avoid port_mg assignment on MT7622 and newer
Date:   Wed,  9 Nov 2022 17:34:17 +0100
Message-Id: <20221109163426.76164-4-nbd@nbd.name>
In-Reply-To: <20221109163426.76164-1-nbd@nbd.name>
References: <20221109163426.76164-1-nbd@nbd.name>
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On newer chips, this field is unused and contains some bits related to queue
assignment. Initialize it to 0 in those cases.
Fix offload_version on MT7621 and MT7623, which still need the previous value.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 4 ++--
 drivers/net/ethernet/mediatek/mtk_ppe.c     | 4 +++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 02a57729db28..9f607c80f49c 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -4243,7 +4243,7 @@ static const struct mtk_soc_data mt7621_data = {
 	.hw_features = MTK_HW_FEATURES,
 	.required_clks = MT7621_CLKS_BITMAP,
 	.required_pctl = false,
-	.offload_version = 2,
+	.offload_version = 1,
 	.hash_offset = 2,
 	.foe_entry_size = sizeof(struct mtk_foe_entry) - 16,
 	.txrx = {
@@ -4282,7 +4282,7 @@ static const struct mtk_soc_data mt7623_data = {
 	.hw_features = MTK_HW_FEATURES,
 	.required_clks = MT7623_CLKS_BITMAP,
 	.required_pctl = true,
-	.offload_version = 2,
+	.offload_version = 1,
 	.hash_offset = 2,
 	.foe_entry_size = sizeof(struct mtk_foe_entry) - 16,
 	.txrx = {
diff --git a/drivers/net/ethernet/mediatek/mtk_ppe.c b/drivers/net/ethernet/mediatek/mtk_ppe.c
index 2d8ca99f2467..3ee2bf53f9e5 100644
--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
@@ -175,6 +175,8 @@ int mtk_foe_entry_prepare(struct mtk_eth *eth, struct mtk_foe_entry *entry,
 		val = FIELD_PREP(MTK_FOE_IB2_DEST_PORT_V2, pse_port) |
 		      FIELD_PREP(MTK_FOE_IB2_PORT_AG_V2, 0xf);
 	} else {
+		int port_mg = eth->soc->offload_version > 1 ? 0 : 0x3f;
+
 		val = FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_BIND) |
 		      FIELD_PREP(MTK_FOE_IB1_PACKET_TYPE, type) |
 		      FIELD_PREP(MTK_FOE_IB1_UDP, l4proto == IPPROTO_UDP) |
@@ -182,7 +184,7 @@ int mtk_foe_entry_prepare(struct mtk_eth *eth, struct mtk_foe_entry *entry,
 		entry->ib1 = val;
 
 		val = FIELD_PREP(MTK_FOE_IB2_DEST_PORT, pse_port) |
-		      FIELD_PREP(MTK_FOE_IB2_PORT_MG, 0x3f) |
+		      FIELD_PREP(MTK_FOE_IB2_PORT_MG, port_mg) |
 		      FIELD_PREP(MTK_FOE_IB2_PORT_AG, 0x1f);
 	}
 
-- 
2.38.1