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   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Fri, 4 Nov 2022 19:49:08 +0100
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: avoid port_mg assignment on
   4  MT7622 and newer
   5
   6 On newer chips, this field is unused and contains some bits related to queue
   7 assignment. Initialize it to 0 in those cases.
   8 Fix offload_version on MT7621 and MT7623, which still need the previous value.
   9
  10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  11 ---
  12
  13 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  14 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  15 @@ -4477,7 +4477,7 @@ static const struct mtk_soc_data mt7621_
  16         .hw_features = MTK_HW_FEATURES,
  17         .required_clks = MT7621_CLKS_BITMAP,
  18         .required_pctl = false,
  19 -       .offload_version = 2,
  20 +       .offload_version = 1,
  21         .hash_offset = 2,
  22         .foe_entry_size = sizeof(struct mtk_foe_entry) - 16,
  23         .txrx = {
  24 @@ -4516,7 +4516,7 @@ static const struct mtk_soc_data mt7623_
  25         .hw_features = MTK_HW_FEATURES,
  26         .required_clks = MT7623_CLKS_BITMAP,
  27         .required_pctl = true,
  28 -       .offload_version = 2,
  29 +       .offload_version = 1,
  30         .hash_offset = 2,
  31         .foe_entry_size = sizeof(struct mtk_foe_entry) - 16,
  32         .txrx = {
  33 --- a/drivers/net/ethernet/mediatek/mtk_ppe.c
  34 +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
  35 @@ -175,6 +175,8 @@ int mtk_foe_entry_prepare(struct mtk_eth
  36                 val = FIELD_PREP(MTK_FOE_IB2_DEST_PORT_V2, pse_port) |
  37                       FIELD_PREP(MTK_FOE_IB2_PORT_AG_V2, 0xf);
  38         } else {
  39 +               int port_mg = eth->soc->offload_version > 1 ? 0 : 0x3f;
  40 +
  41                 val = FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_BIND) |
  42                       FIELD_PREP(MTK_FOE_IB1_PACKET_TYPE, type) |
  43                       FIELD_PREP(MTK_FOE_IB1_UDP, l4proto == IPPROTO_UDP) |
  44 @@ -182,7 +184,7 @@ int mtk_foe_entry_prepare(struct mtk_eth
  45                 entry->ib1 = val;
  46
  47                 val = FIELD_PREP(MTK_FOE_IB2_DEST_PORT, pse_port) |
  48 -                     FIELD_PREP(MTK_FOE_IB2_PORT_MG, 0x3f) |
  49 +                     FIELD_PREP(MTK_FOE_IB2_PORT_MG, port_mg) |
  50                       FIELD_PREP(MTK_FOE_IB2_PORT_AG, 0x1f);
  51         }
  52