Packet Processor Engine (PPE) module used for hw acceleration on EN7581
mac block, in order to properly parse packets, requires DSA untagged
packets on TX side and read DSA tag from DMA descriptor on RX side.
For this reason, enable RX Special Tag (SPTAG) for EN7581 SoC.
This is a preliminary patch to enable netfilter flowtable hw offloading
on EN7581 SoC.
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
drivers/net/dsa/mt7530.c | 5 +++++
drivers/net/dsa/mt7530.h | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 1c83af805209cae40c56138fa8f72261e396f58c..eec8ba9d68088f1dbb2a774a32d3d60af1a9784c 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2586,6 +2586,11 @@ mt7531_setup_common(struct dsa_switch *ds)
/* Allow mirroring frames received on the local port (monitor port). */
mt7530_set(priv, MT753X_AGC, LOCAL_EN);
+ /* Enable Special Tag for rx frames */
+ if (priv->id == ID_EN7581)
+ mt7530_write(priv, MT753X_CPORT_SPTAG_CFG,
+ CPORT_SW2FE_STAG_EN | CPORT_FE2SW_STAG_EN);
+
/* Flush the FDB table */
ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL);
if (ret < 0)
diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index 448200689f492dcb73ef056d7284090c1c662e67..349d72a35771f35d478244ab29be1801b3466a5f 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -627,6 +627,10 @@ enum mt7531_xtal_fsel {
#define MT7531_GPIO12_RG_RXD3_MASK GENMASK(19, 16)
#define MT7531_EXT_P_MDIO_12 (2 << 16)
+#define MT753X_CPORT_SPTAG_CFG 0x7c10
+#define CPORT_SW2FE_STAG_EN BIT(1)
+#define CPORT_FE2SW_STAG_EN BIT(0)
+
/* Registers for LED GPIO control (MT7530 only)
* All registers follow this pattern:
* [ 2: 0] port 0
--
2.48.1
