[PATCH v2 net-next 11/13] net: enetc: add VLAN filtering support for i.MX95 ENETC PF

Wei Fang
2025-01-13T08:40:37Z

Add VLAN hash filter support for i.MX95 ENETC PF. If VLAN filtering is
disabled, then VLAN promiscuous mode will be enabled, which means that
PF qualifies for reception of all VLAN tags.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
---
.../net/ethernet/freescale/enetc/enetc4_hw.h | 4 ++++
.../net/ethernet/freescale/enetc/enetc4_pf.c | 20 +++++++++++++++++++
.../freescale/enetc/enetc_pf_common.c | 2 +-
3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc4_hw.h b/drivers/net/ethernet/freescale/enetc/enetc4_hw.h
index 826359004850..aa25b445d301 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc4_hw.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc4_hw.h
@@ -107,6 +107,10 @@
#define ENETC4_PSIMMHFR0(a) ((a) * 0x80 + 0x2058)
#define ENETC4_PSIMMHFR1(a) ((a) * 0x80 + 0x205c)

+/* Port station interface a VLAN hash filter register 0/1 */
+#define ENETC4_PSIVHFR0(a) ((a) * 0x80 + 0x2060)
+#define ENETC4_PSIVHFR1(a) ((a) * 0x80 + 0x2064)
+
#define ENETC4_PMCAPR 0x4004
#define PMCAPR_HD BIT(8)
#define PMCAPR_FP GENMASK(10, 9)
diff --git a/drivers/net/ethernet/freescale/enetc/enetc4_pf.c b/drivers/net/ethernet/freescale/enetc/enetc4_pf.c
index adb5819c091f..65e6e3742ada 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc4_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc4_pf.c
@@ -85,11 +85,19 @@ static void enetc4_get_rss_key(struct enetc_hw *hw, u8 *key)
((u32 *)key)[i] = enetc_port_rd(hw, ENETC4_PRSSKR(i));
}

+static void enetc4_pf_set_si_vlan_hash_filter(struct enetc_hw *hw,
+ int si, u64 hash)
+{
+ enetc_port_wr(hw, ENETC4_PSIVHFR0(si), lower_32_bits(hash));
+ enetc_port_wr(hw, ENETC4_PSIVHFR1(si), upper_32_bits(hash));
+}
+
static const struct enetc_pf_ops enetc4_pf_ops = {
.set_si_primary_mac = enetc4_pf_set_si_primary_mac,
.get_si_primary_mac = enetc4_pf_get_si_primary_mac,
.set_rss_key = enetc4_set_rss_key,
.get_rss_key = enetc4_get_rss_key,
+ .set_si_vlan_hash_filter = enetc4_pf_set_si_vlan_hash_filter,
};

static int enetc4_pf_struct_init(struct enetc_si *si)
@@ -704,6 +712,16 @@ static void enetc4_pf_set_rx_mode(struct net_device *ndev)
static int enetc4_pf_set_features(struct net_device *ndev,
netdev_features_t features)
{
+ netdev_features_t changed = ndev->features ^ features;
+ struct enetc_ndev_priv *priv = netdev_priv(ndev);
+ struct enetc_hw *hw = &priv->si->hw;
+
+ if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
+ bool promisc_en = !(features & NETIF_F_HW_VLAN_CTAG_FILTER);
+
+ enetc4_pf_set_si_vlan_promisc(hw, 0, promisc_en);
+ }
+
enetc_set_features(ndev, features);

return 0;
@@ -717,6 +735,8 @@ static const struct net_device_ops enetc4_ndev_ops = {
.ndo_set_mac_address = enetc_pf_set_mac_addr,
.ndo_set_rx_mode = enetc4_pf_set_rx_mode,
.ndo_set_features = enetc4_pf_set_features,
+ .ndo_vlan_rx_add_vid = enetc_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = enetc_vlan_rx_del_vid,
};

static struct phylink_pcs *
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
index 9f812c1af7a3..3f7ccc482301 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
@@ -135,7 +135,7 @@ void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev,

/* TODO: currently, i.MX95 ENETC driver does not support advanced features */
if (!is_enetc_rev1(si)) {
- ndev->hw_features &= ~(NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_LOOPBACK);
+ ndev->hw_features &= ~NETIF_F_LOOPBACK;
goto end;
}

--
2.34.1