kernel: fix mtk flow offload list corruption issue with l2 flows

[openwrt/staging/dedeckeh.git] / target / linux / generic / pending-5.15 / 736-03-net-ethernet-mtk_eth_soc-improve-keeping-track-of-of.patch

diff --git a/target/linux/generic/pending-5.15/736-03-net-ethernet-mtk_eth_soc-improve-keeping-track-of-of.patch b/target/linux/generic/pending-5.15/736-03-net-ethernet-mtk_eth_soc-improve-keeping-track-of-of.patch
index f43d15d1149013f1ff8d6fb7c01dff69543d4701..29d6e0b09918cc27533447419b028bc9d907562d 100644 (file)
--- a/target/linux/generic/pending-5.15/736-03-net-ethernet-mtk_eth_soc-improve-keeping-track-of-of.patch
+++ b/target/linux/generic/pending-5.15/736-03-net-ethernet-mtk_eth_soc-improve-keeping-track-of-of.patch
@@ -12,7 +12,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 
 --- a/drivers/net/ethernet/mediatek/mtk_ppe.c
 +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
-@@ -466,26 +466,30 @@ int mtk_foe_entry_set_queue(struct mtk_e
+@@ -466,42 +466,43 @@ int mtk_foe_entry_set_queue(struct mtk_e
        return 0;
  }
  
@@ -51,15 +51,17 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 +__mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
 +                    bool set_state)
  {
-       struct hlist_head *head;
+-      struct hlist_head *head;
        struct hlist_node *tmp;
-@@ -495,13 +499,12 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
+ 
+       if (entry->type == MTK_FLOW_TYPE_L2) {
+               rhashtable_remove_fast(&ppe->l2_flows, &entry->l2_node,
                                       mtk_flow_l2_ht_params);
  
-               head = &entry->l2_flows;
+-              head = &entry->l2_flows;
 -              hlist_for_each_entry_safe(entry, tmp, head, l2_data.list)
 -                      __mtk_foe_entry_clear(ppe, entry);
-+              hlist_for_each_entry_safe(entry, tmp, head, list)
++              hlist_for_each_entry_safe(entry, tmp, &entry->l2_flows, l2_list)
 +                      __mtk_foe_entry_clear(ppe, entry, set_state);
                return;
        }
@@ -70,16 +72,17 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
                struct mtk_foe_entry *hwe = mtk_foe_get_entry(ppe, entry->hash);
  
                hwe->ib1 &= ~MTK_FOE_IB1_STATE;
-@@ -520,7 +523,7 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
+@@ -520,7 +521,8 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
        if (entry->type != MTK_FLOW_TYPE_L2_SUBFLOW)
                return;
  
 -      hlist_del_init(&entry->l2_data.list);
++      hlist_del_init(&entry->l2_list);
 +      hlist_del_init(&entry->list);
        kfree(entry);
  }
  
-@@ -536,66 +539,55 @@ static int __mtk_foe_entry_idle_time(str
+@@ -536,66 +538,55 @@ static int __mtk_foe_entry_idle_time(str
                return now - timestamp;
  }
  
@@ -118,7 +121,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
        idle = __mtk_foe_entry_idle_time(ppe, entry->data.ib1);
 -      hlist_for_each_entry_safe(cur, tmp, &entry->l2_flows, l2_data.list) {
-+      hlist_for_each_entry_safe(cur, tmp, &entry->l2_flows, list) {
++      hlist_for_each_entry_safe(cur, tmp, &entry->l2_flows, l2_list) {
                int cur_idle;
 -              u32 ib1;
 -
@@ -175,7 +178,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  }
  
  static void
-@@ -632,7 +624,8 @@ __mtk_foe_entry_commit(struct mtk_ppe *p
+@@ -632,7 +623,8 @@ __mtk_foe_entry_commit(struct mtk_ppe *p
  void mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
  {
        spin_lock_bh(&ppe_lock);
@@ -185,7 +188,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
        spin_unlock_bh(&ppe_lock);
  }
  
-@@ -679,8 +672,8 @@ mtk_foe_entry_commit_subflow(struct mtk_
+@@ -679,8 +671,8 @@ mtk_foe_entry_commit_subflow(struct mtk_
  {
        const struct mtk_soc_data *soc = ppe->eth->soc;
        struct mtk_flow_entry *flow_info;
@@ -195,7 +198,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
        u32 ib1_mask = mtk_get_ib1_pkt_type_mask(ppe->eth) | MTK_FOE_IB1_UDP;
        int type;
  
-@@ -688,30 +681,30 @@ mtk_foe_entry_commit_subflow(struct mtk_
+@@ -688,30 +680,30 @@ mtk_foe_entry_commit_subflow(struct mtk_
        if (!flow_info)
                return;
  
@@ -205,7 +208,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
        hlist_add_head(&flow_info->list,
                       &ppe->foe_flow[hash / soc->hash_offset]);
 -      hlist_add_head(&flow_info->l2_data.list, &entry->l2_flows);
-+      hlist_add_head(&flow_info->list, &entry->l2_flows);
++      hlist_add_head(&flow_info->l2_list, &entry->l2_flows);
  
        hwe = mtk_foe_get_entry(ppe, hash);
 -      memcpy(&foe, hwe, soc->foe_entry_size);
@@ -236,7 +239,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  }
  
  void __mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash)
-@@ -721,9 +714,11 @@ void __mtk_ppe_check_skb(struct mtk_ppe
+@@ -721,9 +713,11 @@ void __mtk_ppe_check_skb(struct mtk_ppe
        struct mtk_foe_entry *hwe = mtk_foe_get_entry(ppe, hash);
        struct mtk_flow_entry *entry;
        struct mtk_foe_bridge key = {};
@@ -248,7 +251,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
        u8 *tag;
  
        spin_lock_bh(&ppe_lock);
-@@ -731,20 +726,14 @@ void __mtk_ppe_check_skb(struct mtk_ppe
+@@ -731,20 +725,14 @@ void __mtk_ppe_check_skb(struct mtk_ppe
        if (FIELD_GET(MTK_FOE_IB1_STATE, hwe->ib1) == MTK_FOE_STATE_BIND)
                goto out;
  
@@ -275,7 +278,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
                        continue;
                }
  
-@@ -795,9 +784,17 @@ out:
+@@ -795,9 +783,17 @@ out:
  
  int mtk_foe_entry_idle_time(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
  {
@@ -297,7 +300,21 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  int mtk_ppe_prepare_reset(struct mtk_ppe *ppe)
 --- a/drivers/net/ethernet/mediatek/mtk_ppe.h
 +++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
-@@ -275,13 +275,7 @@ struct mtk_flow_entry {
+@@ -265,7 +265,12 @@ enum {
+ 
+ struct mtk_flow_entry {
+       union {
+-              struct hlist_node list;
++              /* regular flows + L2 subflows */
++              struct {
++                      struct hlist_node list;
++                      struct hlist_node l2_list;
++              };
++              /* L2 flows */
+               struct {
+                       struct rhash_head l2_node;
+                       struct hlist_head l2_flows;
+@@ -275,13 +280,7 @@ struct mtk_flow_entry {
        s8 wed_index;
        u8 ppe_index;
        u16 hash;