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Message-Id: <20251015-an7583-eth-support-v1-3-064855f05923@kernel.org>
Date: Wed, 15 Oct 2025 09:15:03 +0200
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: Andrew Lunn <andrew+netdev@...n.ch>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Philipp Zabel <p.zabel@...gutronix.de>,
Lorenzo Bianconi <lorenzo@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org,
devicetree@...r.kernel.org
Subject: [PATCH net-next 03/12] net: airoha: Add
airoha_ppe_get_num_stats_entries() and
airoha_ppe_get_num_total_stats_entries()
Introduce airoha_ppe_get_num_stats_entries and
airoha_ppe_get_num_total_stats_entries routines in order to make the
code more readable controlling if CONFIG_NET_AIROHA_FLOW_STATS is
enabled or disabled.
Modify airoha_ppe_foe_get_flow_stats_index routine signature relying on
airoha_ppe_get_num_total_stats_entries().
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
drivers/net/ethernet/airoha/airoha_eth.h | 10 +--
drivers/net/ethernet/airoha/airoha_ppe.c | 103 +++++++++++++++++++++++++------
2 files changed, 86 insertions(+), 27 deletions(-)
diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
index 4330b672d99e1e190efa5ad75d13fb35e77d070e..1f7e34a5f457ca2200e9c81dd05dc03cd7c5eb77 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.h
+++ b/drivers/net/ethernet/airoha/airoha_eth.h
@@ -50,15 +50,9 @@
#define PPE_NUM 2
#define PPE1_SRAM_NUM_ENTRIES (8 * 1024)
-#define PPE_SRAM_NUM_ENTRIES (2 * PPE1_SRAM_NUM_ENTRIES)
-#ifdef CONFIG_NET_AIROHA_FLOW_STATS
+#define PPE_SRAM_NUM_ENTRIES (PPE_NUM * PPE1_SRAM_NUM_ENTRIES)
#define PPE1_STATS_NUM_ENTRIES (4 * 1024)
-#else
-#define PPE1_STATS_NUM_ENTRIES 0
-#endif /* CONFIG_NET_AIROHA_FLOW_STATS */
-#define PPE_STATS_NUM_ENTRIES (2 * PPE1_STATS_NUM_ENTRIES)
-#define PPE1_SRAM_NUM_DATA_ENTRIES (PPE1_SRAM_NUM_ENTRIES - PPE1_STATS_NUM_ENTRIES)
-#define PPE_SRAM_NUM_DATA_ENTRIES (2 * PPE1_SRAM_NUM_DATA_ENTRIES)
+#define PPE_STATS_NUM_ENTRIES (PPE_NUM * PPE1_STATS_NUM_ENTRIES)
#define PPE_DRAM_NUM_ENTRIES (16 * 1024)
#define PPE_NUM_ENTRIES (PPE_SRAM_NUM_ENTRIES + PPE_DRAM_NUM_ENTRIES)
#define PPE_HASH_MASK (PPE_NUM_ENTRIES - 1)
diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c
index 8d1dceadce0becb2b1ce656d64ab77bd3c2f914a..303d31e1da4b723023ee0cc1ca5f6038c16966cd 100644
--- a/drivers/net/ethernet/airoha/airoha_ppe.c
+++ b/drivers/net/ethernet/airoha/airoha_ppe.c
@@ -32,6 +32,30 @@ static const struct rhashtable_params airoha_l2_flow_table_params = {
.automatic_shrinking = true,
};
+static int airoha_ppe_get_num_stats_entries(struct airoha_ppe *ppe,
+ u32 *num_stats)
+{
+#ifdef CONFIG_NET_AIROHA_FLOW_STATS
+ *num_stats = PPE1_STATS_NUM_ENTRIES;
+ return 0;
+#else
+ return -EOPNOTSUPP;
+#endif /* CONFIG_NET_AIROHA_FLOW_STATS */
+}
+
+static int airoha_ppe_get_total_num_stats_entries(struct airoha_ppe *ppe,
+ u32 *num_stats)
+{
+ int err;
+
+ err = airoha_ppe_get_num_stats_entries(ppe, num_stats);
+ if (err)
+ return err;
+
+ *num_stats = *num_stats * PPE_NUM;
+ return 0;
+}
+
static bool airoha_ppe2_is_enabled(struct airoha_eth *eth)
{
return airoha_fe_rr(eth, REG_PPE_GLO_CFG(1)) & PPE_GLO_CFG_EN_MASK;
@@ -48,6 +72,7 @@ static void airoha_ppe_hw_init(struct airoha_ppe *ppe)
{
u32 sram_tb_size, sram_num_entries, dram_num_entries;
struct airoha_eth *eth = ppe->eth;
+ u32 sram_num_stats_entries;
int i;
sram_tb_size = PPE_SRAM_NUM_ENTRIES * sizeof(struct airoha_foe_entry);
@@ -103,8 +128,12 @@ static void airoha_ppe_hw_init(struct airoha_ppe *ppe)
}
if (airoha_ppe2_is_enabled(eth)) {
- sram_num_entries =
- PPE_RAM_NUM_ENTRIES_SHIFT(PPE1_SRAM_NUM_DATA_ENTRIES);
+ sram_num_entries = PPE1_SRAM_NUM_ENTRIES;
+ if (!airoha_ppe_get_num_stats_entries(ppe,
+ &sram_num_stats_entries))
+ sram_num_entries -= sram_num_stats_entries;
+ sram_num_entries = PPE_RAM_NUM_ENTRIES_SHIFT(sram_num_entries);
+
airoha_fe_rmw(eth, REG_PPE_TB_CFG(0),
PPE_SRAM_TB_NUM_ENTRY_MASK |
PPE_DRAM_TB_NUM_ENTRY_MASK,
@@ -120,8 +149,12 @@ static void airoha_ppe_hw_init(struct airoha_ppe *ppe)
FIELD_PREP(PPE_DRAM_TB_NUM_ENTRY_MASK,
dram_num_entries));
} else {
- sram_num_entries =
- PPE_RAM_NUM_ENTRIES_SHIFT(PPE_SRAM_NUM_DATA_ENTRIES);
+ sram_num_entries = PPE_SRAM_NUM_ENTRIES;
+ if (!airoha_ppe_get_total_num_stats_entries(ppe,
+ &sram_num_stats_entries))
+ sram_num_entries -= sram_num_stats_entries;
+ sram_num_entries = PPE_RAM_NUM_ENTRIES_SHIFT(sram_num_entries);
+
airoha_fe_rmw(eth, REG_PPE_TB_CFG(0),
PPE_SRAM_TB_NUM_ENTRY_MASK |
PPE_DRAM_TB_NUM_ENTRY_MASK,
@@ -480,13 +513,23 @@ static u32 airoha_ppe_foe_get_entry_hash(struct airoha_foe_entry *hwe)
return hash;
}
-static u32 airoha_ppe_foe_get_flow_stats_index(struct airoha_ppe *ppe, u32 hash)
+static int airoha_ppe_foe_get_flow_stats_index(struct airoha_ppe *ppe,
+ u32 hash, u32 *index)
{
- if (!airoha_ppe2_is_enabled(ppe->eth))
- return hash;
+ u32 ppe_num_stats_entries;
+ int err;
+
+ err = airoha_ppe_get_total_num_stats_entries(ppe,
+ &ppe_num_stats_entries);
+ if (err)
+ return err;
- return hash >= PPE_STATS_NUM_ENTRIES ? hash - PPE1_STATS_NUM_ENTRIES
- : hash;
+ *index = hash;
+ if (airoha_ppe2_is_enabled(ppe->eth) &&
+ hash >= ppe_num_stats_entries)
+ *index = *index - PPE_STATS_NUM_ENTRIES;
+
+ return 0;
}
static void airoha_ppe_foe_flow_stat_entry_reset(struct airoha_ppe *ppe,
@@ -500,9 +543,14 @@ static void airoha_ppe_foe_flow_stat_entry_reset(struct airoha_ppe *ppe,
static void airoha_ppe_foe_flow_stats_reset(struct airoha_ppe *ppe,
struct airoha_npu *npu)
{
+ u32 ppe_num_stats_entries;
int i;
- for (i = 0; i < PPE_STATS_NUM_ENTRIES; i++)
+ if (airoha_ppe_get_total_num_stats_entries(ppe,
+ &ppe_num_stats_entries))
+ return;
+
+ for (i = 0; i < ppe_num_stats_entries; i++)
airoha_ppe_foe_flow_stat_entry_reset(ppe, npu, i);
}
@@ -511,12 +559,18 @@ static void airoha_ppe_foe_flow_stats_update(struct airoha_ppe *ppe,
struct airoha_foe_entry *hwe,
u32 hash)
{
+ u32 ppe_num_stats_entries, index, pse_port, val, *data, *ib2, *meter;
int type = FIELD_GET(AIROHA_FOE_IB1_BIND_PACKET_TYPE, hwe->ib1);
- u32 index, pse_port, val, *data, *ib2, *meter;
u8 nbq;
- index = airoha_ppe_foe_get_flow_stats_index(ppe, hash);
- if (index >= PPE_STATS_NUM_ENTRIES)
+ if (airoha_ppe_get_total_num_stats_entries(ppe,
+ &ppe_num_stats_entries))
+ return;
+
+ if (airoha_ppe_foe_get_flow_stats_index(ppe, hash, &index))
+ return;
+
+ if (index >= ppe_num_stats_entries)
return;
if (type == PPE_PKT_TYPE_BRIDGE) {
@@ -1158,11 +1212,18 @@ static int airoha_ppe_flow_offload_destroy(struct airoha_eth *eth,
void airoha_ppe_foe_entry_get_stats(struct airoha_ppe *ppe, u32 hash,
struct airoha_foe_stats64 *stats)
{
- u32 index = airoha_ppe_foe_get_flow_stats_index(ppe, hash);
struct airoha_eth *eth = ppe->eth;
+ u32 index, ppe_num_stats_entries;
struct airoha_npu *npu;
- if (index >= PPE_STATS_NUM_ENTRIES)
+ if (airoha_ppe_get_total_num_stats_entries(ppe,
+ &ppe_num_stats_entries))
+ return;
+
+ if (airoha_ppe_foe_get_flow_stats_index(ppe, hash, &index))
+ return;
+
+ if (index >= ppe_num_stats_entries)
return;
rcu_read_lock();
@@ -1257,6 +1318,7 @@ static int airoha_ppe_offload_setup(struct airoha_eth *eth)
{
struct airoha_npu *npu = airoha_ppe_npu_get(eth);
struct airoha_ppe *ppe = eth->ppe;
+ u32 ppe_num_stats_entries;
int err;
if (IS_ERR(npu))
@@ -1266,9 +1328,10 @@ static int airoha_ppe_offload_setup(struct airoha_eth *eth)
if (err)
goto error_npu_put;
- if (PPE_STATS_NUM_ENTRIES) {
+ if (!airoha_ppe_get_total_num_stats_entries(ppe,
+ &ppe_num_stats_entries)) {
err = npu->ops.ppe_init_stats(npu, ppe->foe_stats_dma,
- PPE_STATS_NUM_ENTRIES);
+ ppe_num_stats_entries);
if (err)
goto error_npu_put;
}
@@ -1405,6 +1468,7 @@ EXPORT_SYMBOL_GPL(airoha_ppe_put_dev);
int airoha_ppe_init(struct airoha_eth *eth)
{
+ u32 ppe_num_stats_entries;
struct airoha_ppe *ppe;
int foe_size, err;
@@ -1431,8 +1495,9 @@ int airoha_ppe_init(struct airoha_eth *eth)
if (!ppe->foe_flow)
return -ENOMEM;
- foe_size = PPE_STATS_NUM_ENTRIES * sizeof(*ppe->foe_stats);
- if (foe_size) {
+ if (!airoha_ppe_get_total_num_stats_entries(ppe,
+ &ppe_num_stats_entries)) {
+ foe_size = ppe_num_stats_entries * sizeof(*ppe->foe_stats);
ppe->foe_stats = dmam_alloc_coherent(eth->dev, foe_size,
&ppe->foe_stats_dma,
GFP_KERNEL);
--
2.51.0
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