[openwrt/openwrt] kernel: improve mtk ppe flow accounting
LEDE Commits
lede-commits at lists.infradead.org
Thu Mar 23 09:54:49 PDT 2023
nbd pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/aa2777145f8d392006196d8501f5520d19c05f11
commit aa2777145f8d392006196d8501f5520d19c05f11
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Thu Mar 23 14:23:19 2023 +0100
kernel: improve mtk ppe flow accounting
Properly track L2 flows, and ensure that stale data gets cleared
Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
...t-mtk_eth_soc-improve-keeping-track-of-of.patch | 314 ++++++++++++++++++++
...t-mediatek-fix-ppe-flow-accounting-for-L2.patch | 320 +++++++++++++++++++++
...t-mtk_eth_soc-add-missing-ppe-cache-flush.patch | 21 ++
3 files changed, 655 insertions(+)
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
new file mode 100644
index 0000000000..f43d15d114
--- /dev/null
+++ b/target/linux/generic/pending-5.15/736-03-net-ethernet-mtk_eth_soc-improve-keeping-track-of-of.patch
@@ -0,0 +1,314 @@
+From: Felix Fietkau <nbd at nbd.name>
+Date: Thu, 23 Mar 2023 10:24:11 +0100
+Subject: [PATCH] net: ethernet: mtk_eth_soc: improve keeping track of
+ offloaded flows
+
+Unify tracking of L2 and L3 flows. Use the generic list field in struct
+mtk_foe_entry for tracking L2 subflows. Preparation for improving
+flow accounting support.
+
+Signed-off-by: Felix Fietkau <nbd at 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
+ return 0;
+ }
+
++static int
++mtk_flow_entry_match_len(struct mtk_eth *eth, struct mtk_foe_entry *entry)
++{
++ int type = mtk_get_ib1_pkt_type(eth, entry->ib1);
++
++ if (type > MTK_PPE_PKT_TYPE_IPV4_DSLITE)
++ return offsetof(struct mtk_foe_entry, ipv6._rsv);
++ else
++ return offsetof(struct mtk_foe_entry, ipv4.ib2);
++}
++
+ static bool
+ mtk_flow_entry_match(struct mtk_eth *eth, struct mtk_flow_entry *entry,
+- struct mtk_foe_entry *data)
++ struct mtk_foe_entry *data, int len)
+ {
+- int type, len;
+-
+ if ((data->ib1 ^ entry->data.ib1) & MTK_FOE_IB1_UDP)
+ return false;
+
+- type = mtk_get_ib1_pkt_type(eth, entry->data.ib1);
+- if (type > MTK_PPE_PKT_TYPE_IPV4_DSLITE)
+- len = offsetof(struct mtk_foe_entry, ipv6._rsv);
+- else
+- len = offsetof(struct mtk_foe_entry, ipv4.ib2);
+-
+ return !memcmp(&entry->data.data, &data->data, len - 4);
+ }
+
+ static void
+-__mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
++__mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
++ bool set_state)
+ {
+ struct hlist_head *head;
+ struct hlist_node *tmp;
+@@ -495,13 +499,12 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
+ mtk_flow_l2_ht_params);
+
+ 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)
++ __mtk_foe_entry_clear(ppe, entry, set_state);
+ return;
+ }
+
+- hlist_del_init(&entry->list);
+- if (entry->hash != 0xffff) {
++ if (entry->hash != 0xffff && set_state) {
+ 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
+ if (entry->type != MTK_FLOW_TYPE_L2_SUBFLOW)
+ return;
+
+- hlist_del_init(&entry->l2_data.list);
++ hlist_del_init(&entry->list);
+ kfree(entry);
+ }
+
+@@ -536,66 +539,55 @@ static int __mtk_foe_entry_idle_time(str
+ return now - timestamp;
+ }
+
++static bool
++mtk_flow_entry_update(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
++{
++ struct mtk_foe_entry foe = {};
++ struct mtk_foe_entry *hwe;
++ u16 hash = entry->hash;
++ int len;
++
++ if (hash == 0xffff)
++ return false;
++
++ hwe = mtk_foe_get_entry(ppe, hash);
++ len = mtk_flow_entry_match_len(ppe->eth, &entry->data);
++ memcpy(&foe, hwe, len);
++
++ if (!mtk_flow_entry_match(ppe->eth, entry, &foe, len) ||
++ FIELD_GET(MTK_FOE_IB1_STATE, foe.ib1) != MTK_FOE_STATE_BIND)
++ return false;
++
++ entry->data.ib1 = foe.ib1;
++
++ return true;
++}
++
+ static void
+ mtk_flow_entry_update_l2(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
+ {
+ u32 ib1_ts_mask = mtk_get_ib1_ts_mask(ppe->eth);
+ struct mtk_flow_entry *cur;
+- struct mtk_foe_entry *hwe;
+ struct hlist_node *tmp;
+ int idle;
+
+ 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) {
+ int cur_idle;
+- u32 ib1;
+-
+- hwe = mtk_foe_get_entry(ppe, cur->hash);
+- ib1 = READ_ONCE(hwe->ib1);
+
+- if (FIELD_GET(MTK_FOE_IB1_STATE, ib1) != MTK_FOE_STATE_BIND) {
+- cur->hash = 0xffff;
+- __mtk_foe_entry_clear(ppe, cur);
++ if (!mtk_flow_entry_update(ppe, cur)) {
++ __mtk_foe_entry_clear(ppe, entry, false);
+ continue;
+ }
+
+- cur_idle = __mtk_foe_entry_idle_time(ppe, ib1);
++ cur_idle = __mtk_foe_entry_idle_time(ppe, cur->data.ib1);
+ if (cur_idle >= idle)
+ continue;
+
+ idle = cur_idle;
+ entry->data.ib1 &= ~ib1_ts_mask;
+- entry->data.ib1 |= hwe->ib1 & ib1_ts_mask;
+- }
+-}
+-
+-static void
+-mtk_flow_entry_update(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
+-{
+- struct mtk_foe_entry foe = {};
+- struct mtk_foe_entry *hwe;
+-
+- spin_lock_bh(&ppe_lock);
+-
+- if (entry->type == MTK_FLOW_TYPE_L2) {
+- mtk_flow_entry_update_l2(ppe, entry);
+- goto out;
++ entry->data.ib1 |= cur->data.ib1 & ib1_ts_mask;
+ }
+-
+- if (entry->hash == 0xffff)
+- goto out;
+-
+- hwe = mtk_foe_get_entry(ppe, entry->hash);
+- memcpy(&foe, hwe, ppe->eth->soc->foe_entry_size);
+- if (!mtk_flow_entry_match(ppe->eth, entry, &foe)) {
+- entry->hash = 0xffff;
+- goto out;
+- }
+-
+- entry->data.ib1 = foe.ib1;
+-
+-out:
+- spin_unlock_bh(&ppe_lock);
+ }
+
+ static void
+@@ -632,7 +624,8 @@ __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);
+- __mtk_foe_entry_clear(ppe, entry);
++ __mtk_foe_entry_clear(ppe, entry, true);
++ hlist_del_init(&entry->list);
+ spin_unlock_bh(&ppe_lock);
+ }
+
+@@ -679,8 +672,8 @@ mtk_foe_entry_commit_subflow(struct mtk_
+ {
+ const struct mtk_soc_data *soc = ppe->eth->soc;
+ struct mtk_flow_entry *flow_info;
+- struct mtk_foe_entry foe = {}, *hwe;
+ struct mtk_foe_mac_info *l2;
++ struct mtk_foe_entry *hwe;
+ 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_
+ if (!flow_info)
+ return;
+
+- flow_info->l2_data.base_flow = entry;
+ flow_info->type = MTK_FLOW_TYPE_L2_SUBFLOW;
+ flow_info->hash = hash;
+ 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);
+
+ hwe = mtk_foe_get_entry(ppe, hash);
+- memcpy(&foe, hwe, soc->foe_entry_size);
+- foe.ib1 &= ib1_mask;
+- foe.ib1 |= entry->data.ib1 & ~ib1_mask;
++ memcpy(&flow_info->data, hwe, soc->foe_entry_size);
++ flow_info->data.ib1 &= ib1_mask;
++ flow_info->data.ib1 |= entry->data.ib1 & ~ib1_mask;
+
+- l2 = mtk_foe_entry_l2(ppe->eth, &foe);
++ l2 = mtk_foe_entry_l2(ppe->eth, &flow_info->data);
+ memcpy(l2, &entry->data.bridge.l2, sizeof(*l2));
+
+- type = mtk_get_ib1_pkt_type(ppe->eth, foe.ib1);
++ type = mtk_get_ib1_pkt_type(ppe->eth, flow_info->data.ib1);
+ if (type == MTK_PPE_PKT_TYPE_IPV4_HNAPT)
+- memcpy(&foe.ipv4.new, &foe.ipv4.orig, sizeof(foe.ipv4.new));
++ memcpy(&flow_info->data.ipv4.new, &flow_info->data.ipv4.orig,
++ sizeof(flow_info->data.ipv4.new));
+ else if (type >= MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T && l2->etype == ETH_P_IP)
+ l2->etype = ETH_P_IPV6;
+
+- *mtk_foe_entry_ib2(ppe->eth, &foe) = entry->data.bridge.ib2;
++ *mtk_foe_entry_ib2(ppe->eth, &flow_info->data) = entry->data.bridge.ib2;
+
+- __mtk_foe_entry_commit(ppe, &foe, hash);
++ __mtk_foe_entry_commit(ppe, &flow_info->data, hash);
+ }
+
+ 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
+ struct mtk_foe_entry *hwe = mtk_foe_get_entry(ppe, hash);
+ struct mtk_flow_entry *entry;
+ struct mtk_foe_bridge key = {};
++ struct mtk_foe_entry foe = {};
+ struct hlist_node *n;
+ struct ethhdr *eh;
+ bool found = false;
++ int entry_len;
+ u8 *tag;
+
+ spin_lock_bh(&ppe_lock);
+@@ -731,20 +726,14 @@ void __mtk_ppe_check_skb(struct mtk_ppe
+ if (FIELD_GET(MTK_FOE_IB1_STATE, hwe->ib1) == MTK_FOE_STATE_BIND)
+ goto out;
+
+- hlist_for_each_entry_safe(entry, n, head, list) {
+- if (entry->type == MTK_FLOW_TYPE_L2_SUBFLOW) {
+- if (unlikely(FIELD_GET(MTK_FOE_IB1_STATE, hwe->ib1) ==
+- MTK_FOE_STATE_BIND))
+- continue;
+-
+- entry->hash = 0xffff;
+- __mtk_foe_entry_clear(ppe, entry);
+- continue;
+- }
++ entry_len = mtk_flow_entry_match_len(ppe->eth, hwe);
++ memcpy(&foe, hwe, entry_len);
+
+- if (found || !mtk_flow_entry_match(ppe->eth, entry, hwe)) {
++ hlist_for_each_entry_safe(entry, n, head, list) {
++ if (found ||
++ !mtk_flow_entry_match(ppe->eth, entry, &foe, entry_len)) {
+ if (entry->hash != 0xffff)
+- entry->hash = 0xffff;
++ __mtk_foe_entry_clear(ppe, entry, false);
+ continue;
+ }
+
+@@ -795,9 +784,17 @@ out:
+
+ int mtk_foe_entry_idle_time(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
+ {
+- mtk_flow_entry_update(ppe, entry);
++ int idle;
++
++ spin_lock_bh(&ppe_lock);
++ if (entry->type == MTK_FLOW_TYPE_L2)
++ mtk_flow_entry_update_l2(ppe, entry);
++ else
++ mtk_flow_entry_update(ppe, entry);
++ idle = __mtk_foe_entry_idle_time(ppe, entry->data.ib1);
++ spin_unlock_bh(&ppe_lock);
+
+- return __mtk_foe_entry_idle_time(ppe, entry->data.ib1);
++ return idle;
+ }
+
+ 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 {
+ s8 wed_index;
+ u8 ppe_index;
+ u16 hash;
+- union {
+- struct mtk_foe_entry data;
+- struct {
+- struct mtk_flow_entry *base_flow;
+- struct hlist_node list;
+- } l2_data;
+- };
++ struct mtk_foe_entry data;
+ struct rhash_head node;
+ unsigned long cookie;
+ };
diff --git a/target/linux/generic/pending-5.15/736-04-net-ethernet-mediatek-fix-ppe-flow-accounting-for-L2.patch b/target/linux/generic/pending-5.15/736-04-net-ethernet-mediatek-fix-ppe-flow-accounting-for-L2.patch
new file mode 100644
index 0000000000..888ecc9b61
--- /dev/null
+++ b/target/linux/generic/pending-5.15/736-04-net-ethernet-mediatek-fix-ppe-flow-accounting-for-L2.patch
@@ -0,0 +1,320 @@
+From: Felix Fietkau <nbd at nbd.name>
+Date: Thu, 23 Mar 2023 11:05:22 +0100
+Subject: [PATCH] net: ethernet: mediatek: fix ppe flow accounting for L2
+ flows
+
+For L2 flows, the packet/byte counters should report the sum of the
+counters of their subflows, both current and expired.
+In order to make this work, change the way that accounting data is tracked.
+Reset counters when a flow enters bind. Once it expires (or enters unbind),
+store the last counter value in struct mtk_flow_entry.
+
+Signed-off-by: Felix Fietkau <nbd at nbd.name>
+---
+
+--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
++++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
+@@ -80,9 +80,9 @@ static int mtk_ppe_mib_wait_busy(struct
+ int ret;
+ u32 val;
+
+- ret = readl_poll_timeout(ppe->base + MTK_PPE_MIB_SER_CR, val,
+- !(val & MTK_PPE_MIB_SER_CR_ST),
+- 20, MTK_PPE_WAIT_TIMEOUT_US);
++ ret = readl_poll_timeout_atomic(ppe->base + MTK_PPE_MIB_SER_CR, val,
++ !(val & MTK_PPE_MIB_SER_CR_ST),
++ 20, MTK_PPE_WAIT_TIMEOUT_US);
+
+ if (ret)
+ dev_err(ppe->dev, "MIB table busy");
+@@ -90,18 +90,32 @@ static int mtk_ppe_mib_wait_busy(struct
+ return ret;
+ }
+
+-static int mtk_mib_entry_read(struct mtk_ppe *ppe, u16 index, u64 *bytes, u64 *packets)
++static inline struct mtk_foe_accounting *
++mtk_ppe_acct_data(struct mtk_ppe *ppe, u16 index)
++{
++ if (!ppe->acct_table)
++ return NULL;
++
++ return ppe->acct_table + index * sizeof(struct mtk_foe_accounting);
++}
++
++struct mtk_foe_accounting *mtk_ppe_mib_entry_read(struct mtk_ppe *ppe, u16 index)
+ {
+ u32 byte_cnt_low, byte_cnt_high, pkt_cnt_low, pkt_cnt_high;
+ u32 val, cnt_r0, cnt_r1, cnt_r2;
++ struct mtk_foe_accounting *acct;
+ int ret;
+
+ val = FIELD_PREP(MTK_PPE_MIB_SER_CR_ADDR, index) | MTK_PPE_MIB_SER_CR_ST;
+ ppe_w32(ppe, MTK_PPE_MIB_SER_CR, val);
+
++ acct = mtk_ppe_acct_data(ppe, index);
++ if (!acct)
++ return NULL;
++
+ ret = mtk_ppe_mib_wait_busy(ppe);
+ if (ret)
+- return ret;
++ return acct;
+
+ cnt_r0 = readl(ppe->base + MTK_PPE_MIB_SER_R0);
+ cnt_r1 = readl(ppe->base + MTK_PPE_MIB_SER_R1);
+@@ -111,10 +125,11 @@ static int mtk_mib_entry_read(struct mtk
+ byte_cnt_high = FIELD_GET(MTK_PPE_MIB_SER_R1_BYTE_CNT_HIGH, cnt_r1);
+ pkt_cnt_low = FIELD_GET(MTK_PPE_MIB_SER_R1_PKT_CNT_LOW, cnt_r1);
+ pkt_cnt_high = FIELD_GET(MTK_PPE_MIB_SER_R2_PKT_CNT_HIGH, cnt_r2);
+- *bytes = ((u64)byte_cnt_high << 32) | byte_cnt_low;
+- *packets = (pkt_cnt_high << 16) | pkt_cnt_low;
+
+- return 0;
++ acct->bytes += ((u64)byte_cnt_high << 32) | byte_cnt_low;
++ acct->packets += (pkt_cnt_high << 16) | pkt_cnt_low;
++
++ return acct;
+ }
+
+ static void mtk_ppe_cache_clear(struct mtk_ppe *ppe)
+@@ -510,13 +525,6 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
+ hwe->ib1 &= ~MTK_FOE_IB1_STATE;
+ hwe->ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_INVALID);
+ dma_wmb();
+- if (ppe->accounting) {
+- struct mtk_foe_accounting *acct;
+-
+- acct = ppe->acct_table + entry->hash * sizeof(*acct);
+- acct->packets = 0;
+- acct->bytes = 0;
+- }
+ }
+ entry->hash = 0xffff;
+
+@@ -540,8 +548,10 @@ static int __mtk_foe_entry_idle_time(str
+ }
+
+ static bool
+-mtk_flow_entry_update(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
++mtk_flow_entry_update(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
++ u64 *packets, u64 *bytes)
+ {
++ struct mtk_foe_accounting *acct;
+ struct mtk_foe_entry foe = {};
+ struct mtk_foe_entry *hwe;
+ u16 hash = entry->hash;
+@@ -555,16 +565,29 @@ mtk_flow_entry_update(struct mtk_ppe *pp
+ memcpy(&foe, hwe, len);
+
+ if (!mtk_flow_entry_match(ppe->eth, entry, &foe, len) ||
+- FIELD_GET(MTK_FOE_IB1_STATE, foe.ib1) != MTK_FOE_STATE_BIND)
++ FIELD_GET(MTK_FOE_IB1_STATE, foe.ib1) != MTK_FOE_STATE_BIND) {
++ acct = mtk_ppe_acct_data(ppe, hash);
++ if (acct) {
++ entry->packets += acct->packets;
++ entry->bytes += acct->bytes;
++ }
++
+ return false;
++ }
+
+ entry->data.ib1 = foe.ib1;
++ acct = mtk_ppe_mib_entry_read(ppe, hash);
++ if (acct) {
++ *packets += acct->packets;
++ *bytes += acct->bytes;
++ }
+
+ return true;
+ }
+
+ static void
+-mtk_flow_entry_update_l2(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
++mtk_flow_entry_update_l2(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
++ u64 *packets, u64 *bytes)
+ {
+ u32 ib1_ts_mask = mtk_get_ib1_ts_mask(ppe->eth);
+ struct mtk_flow_entry *cur;
+@@ -575,7 +598,9 @@ mtk_flow_entry_update_l2(struct mtk_ppe
+ hlist_for_each_entry_safe(cur, tmp, &entry->l2_flows, list) {
+ int cur_idle;
+
+- if (!mtk_flow_entry_update(ppe, cur)) {
++ if (!mtk_flow_entry_update(ppe, cur, packets, bytes)) {
++ entry->packets += cur->packets;
++ entry->bytes += cur->bytes;
+ __mtk_foe_entry_clear(ppe, entry, false);
+ continue;
+ }
+@@ -590,10 +615,31 @@ mtk_flow_entry_update_l2(struct mtk_ppe
+ }
+ }
+
++void mtk_foe_entry_get_stats(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
++ int *idle, u64 *packets, u64 *bytes)
++{
++ *packets = 0;
++ *bytes = 0;
++
++ spin_lock_bh(&ppe_lock);
++
++ if (entry->type == MTK_FLOW_TYPE_L2)
++ mtk_flow_entry_update_l2(ppe, entry, packets, bytes);
++ else
++ mtk_flow_entry_update(ppe, entry, packets, bytes);
++
++ *packets += entry->packets;
++ *bytes += entry->bytes;
++ *idle = __mtk_foe_entry_idle_time(ppe, entry->data.ib1);
++
++ spin_unlock_bh(&ppe_lock);
++}
++
+ static void
+ __mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_foe_entry *entry,
+ u16 hash)
+ {
++ struct mtk_foe_accounting *acct;
+ struct mtk_eth *eth = ppe->eth;
+ u16 timestamp = mtk_eth_timestamp(eth);
+ struct mtk_foe_entry *hwe;
+@@ -618,6 +664,12 @@ __mtk_foe_entry_commit(struct mtk_ppe *p
+
+ dma_wmb();
+
++ acct = mtk_ppe_mib_entry_read(ppe, hash);
++ if (acct) {
++ acct->packets = 0;
++ acct->bytes = 0;
++ }
++
+ mtk_ppe_cache_clear(ppe);
+ }
+
+@@ -782,21 +834,6 @@ out:
+ spin_unlock_bh(&ppe_lock);
+ }
+
+-int mtk_foe_entry_idle_time(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
+-{
+- int idle;
+-
+- spin_lock_bh(&ppe_lock);
+- if (entry->type == MTK_FLOW_TYPE_L2)
+- mtk_flow_entry_update_l2(ppe, entry);
+- else
+- mtk_flow_entry_update(ppe, entry);
+- idle = __mtk_foe_entry_idle_time(ppe, entry->data.ib1);
+- spin_unlock_bh(&ppe_lock);
+-
+- return idle;
+-}
+-
+ int mtk_ppe_prepare_reset(struct mtk_ppe *ppe)
+ {
+ if (!ppe)
+@@ -824,32 +861,6 @@ int mtk_ppe_prepare_reset(struct mtk_ppe
+ return mtk_ppe_wait_busy(ppe);
+ }
+
+-struct mtk_foe_accounting *mtk_foe_entry_get_mib(struct mtk_ppe *ppe, u32 index,
+- struct mtk_foe_accounting *diff)
+-{
+- struct mtk_foe_accounting *acct;
+- int size = sizeof(struct mtk_foe_accounting);
+- u64 bytes, packets;
+-
+- if (!ppe->accounting)
+- return NULL;
+-
+- if (mtk_mib_entry_read(ppe, index, &bytes, &packets))
+- return NULL;
+-
+- acct = ppe->acct_table + index * size;
+-
+- acct->bytes += bytes;
+- acct->packets += packets;
+-
+- if (diff) {
+- diff->bytes = bytes;
+- diff->packets = packets;
+- }
+-
+- return acct;
+-}
+-
+ struct mtk_ppe *mtk_ppe_init(struct mtk_eth *eth, void __iomem *base, int index)
+ {
+ bool accounting = eth->soc->has_accounting;
+--- a/drivers/net/ethernet/mediatek/mtk_ppe.h
++++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
+@@ -278,6 +278,8 @@ struct mtk_flow_entry {
+ struct mtk_foe_entry data;
+ struct rhash_head node;
+ unsigned long cookie;
++ u64 packets;
++ u64 bytes;
+ };
+
+ struct mtk_mib_entry {
+@@ -320,6 +322,7 @@ struct mtk_ppe *mtk_ppe_init(struct mtk_
+ void mtk_ppe_start(struct mtk_ppe *ppe);
+ int mtk_ppe_stop(struct mtk_ppe *ppe);
+ int mtk_ppe_prepare_reset(struct mtk_ppe *ppe);
++struct mtk_foe_accounting *mtk_ppe_mib_entry_read(struct mtk_ppe *ppe, u16 index);
+
+ void __mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash);
+
+@@ -368,9 +371,8 @@ int mtk_foe_entry_set_queue(struct mtk_e
+ unsigned int queue);
+ int mtk_foe_entry_commit(struct mtk_ppe *ppe, struct mtk_flow_entry *entry);
+ void mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry);
+-int mtk_foe_entry_idle_time(struct mtk_ppe *ppe, struct mtk_flow_entry *entry);
+ int mtk_ppe_debugfs_init(struct mtk_ppe *ppe, int index);
+-struct mtk_foe_accounting *mtk_foe_entry_get_mib(struct mtk_ppe *ppe, u32 index,
+- struct mtk_foe_accounting *diff);
++void mtk_foe_entry_get_stats(struct mtk_ppe *ppe, struct mtk_flow_entry *entry,
++ int *idle, u64 *packets, u64 *bytes);
+
+ #endif
+--- a/drivers/net/ethernet/mediatek/mtk_ppe_debugfs.c
++++ b/drivers/net/ethernet/mediatek/mtk_ppe_debugfs.c
+@@ -96,7 +96,7 @@ mtk_ppe_debugfs_foe_show(struct seq_file
+ if (bind && state != MTK_FOE_STATE_BIND)
+ continue;
+
+- acct = mtk_foe_entry_get_mib(ppe, i, NULL);
++ acct = mtk_ppe_mib_entry_read(ppe, i);
+
+ type = FIELD_GET(MTK_FOE_IB1_PACKET_TYPE, entry->ib1);
+ seq_printf(m, "%05x %s %7s", i,
+--- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
++++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
+@@ -499,24 +499,17 @@ static int
+ mtk_flow_offload_stats(struct mtk_eth *eth, struct flow_cls_offload *f)
+ {
+ struct mtk_flow_entry *entry;
+- struct mtk_foe_accounting diff;
+- u32 idle;
++ int idle;
+
+ entry = rhashtable_lookup(ð->flow_table, &f->cookie,
+ mtk_flow_ht_params);
+ if (!entry)
+ return -ENOENT;
+
+- idle = mtk_foe_entry_idle_time(eth->ppe[entry->ppe_index], entry);
++ mtk_foe_entry_get_stats(eth->ppe[entry->ppe_index], entry, &idle,
++ &f->stats.pkts, &f->stats.bytes);
+ f->stats.lastused = jiffies - idle * HZ;
+
+- if (entry->hash != 0xFFFF &&
+- mtk_foe_entry_get_mib(eth->ppe[entry->ppe_index], entry->hash,
+- &diff)) {
+- f->stats.pkts += diff.packets;
+- f->stats.bytes += diff.bytes;
+- }
+-
+ return 0;
+ }
+
diff --git a/target/linux/generic/pending-5.15/736-05-net-ethernet-mtk_eth_soc-add-missing-ppe-cache-flush.patch b/target/linux/generic/pending-5.15/736-05-net-ethernet-mtk_eth_soc-add-missing-ppe-cache-flush.patch
new file mode 100644
index 0000000000..0b876acacf
--- /dev/null
+++ b/target/linux/generic/pending-5.15/736-05-net-ethernet-mtk_eth_soc-add-missing-ppe-cache-flush.patch
@@ -0,0 +1,21 @@
+From: Felix Fietkau <nbd at nbd.name>
+Date: Thu, 23 Mar 2023 11:19:14 +0100
+Subject: [PATCH] net: ethernet: mtk_eth_soc: add missing ppe cache flush when
+ deleting a flow
+
+The cache needs to be flushed to ensure that the hardware stops offloading
+the flow immediately.
+
+Signed-off-by: Felix Fietkau <nbd at nbd.name>
+---
+
+--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
++++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
+@@ -525,6 +525,7 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
+ hwe->ib1 &= ~MTK_FOE_IB1_STATE;
+ hwe->ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_INVALID);
+ dma_wmb();
++ mtk_ppe_cache_clear(ppe);
+ }
+ entry->hash = 0xffff;
+
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