From: Horatiu Vultur horatiu.vultur@microchip.com
[ Upstream commit 25f28bb1b4a7717a9df3aa574d210374ebb6bb23 ]
When vlan filtering is enabled/disabled, it is required to adjust the maximum received frame size that it can received. When vlan filtering is enabled, it would all to receive extra 4 bytes, that are the vlan tag. So the maximum frame size would be 1522 with a vlan tag. If vlan filtering is disabled then the maximum frame size would be 1518 regardless if there is or not a vlan tag.
Fixes: 6d2c186afa5d ("net: lan966x: Add vlan support.") Signed-off-by: Horatiu Vultur horatiu.vultur@microchip.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- .../net/ethernet/microchip/lan966x/lan966x_regs.h | 15 +++++++++++++++ .../net/ethernet/microchip/lan966x/lan966x_vlan.c | 6 ++++++ 2 files changed, 21 insertions(+)
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h b/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h index 8265ad89f0bc..357ecc2f1089 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_regs.h @@ -444,6 +444,21 @@ enum lan966x_target { #define DEV_MAC_MAXLEN_CFG_MAX_LEN_GET(x)\ FIELD_GET(DEV_MAC_MAXLEN_CFG_MAX_LEN, x)
+/* DEV:MAC_CFG_STATUS:MAC_TAGS_CFG */ +#define DEV_MAC_TAGS_CFG(t) __REG(TARGET_DEV, t, 8, 28, 0, 1, 44, 12, 0, 1, 4) + +#define DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA BIT(1) +#define DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA_SET(x)\ + FIELD_PREP(DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA, x) +#define DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA_GET(x)\ + FIELD_GET(DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA, x) + +#define DEV_MAC_TAGS_CFG_VLAN_AWR_ENA BIT(0) +#define DEV_MAC_TAGS_CFG_VLAN_AWR_ENA_SET(x)\ + FIELD_PREP(DEV_MAC_TAGS_CFG_VLAN_AWR_ENA, x) +#define DEV_MAC_TAGS_CFG_VLAN_AWR_ENA_GET(x)\ + FIELD_GET(DEV_MAC_TAGS_CFG_VLAN_AWR_ENA, x) + /* DEV:MAC_CFG_STATUS:MAC_IFG_CFG */ #define DEV_MAC_IFG_CFG(t) __REG(TARGET_DEV, t, 8, 28, 0, 1, 44, 20, 0, 1, 4)
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c index 8d7260cd7da9..3c44660128da 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c @@ -169,6 +169,12 @@ void lan966x_vlan_port_apply(struct lan966x_port *port) ANA_VLAN_CFG_VLAN_POP_CNT, lan966x, ANA_VLAN_CFG(port->chip_port));
+ lan_rmw(DEV_MAC_TAGS_CFG_VLAN_AWR_ENA_SET(port->vlan_aware) | + DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA_SET(port->vlan_aware), + DEV_MAC_TAGS_CFG_VLAN_AWR_ENA | + DEV_MAC_TAGS_CFG_VLAN_DBL_AWR_ENA, + lan966x, DEV_MAC_TAGS_CFG(port->chip_port)); + /* Drop frames with multicast source address */ val = ANA_DROP_CFG_DROP_MC_SMAC_ENA_SET(1); if (port->vlan_aware && !pvid)