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net: lan966x: Adjust maximum frame size when vlan is enabled/disabled

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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: 6d2c186afa ("net: lan966x: Add vlan support.")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Horatiu Vultur
2022-10-30 22:36:35 +01:00
committed by Jakub Kicinski
parent 486c292230
commit 25f28bb1b4
2 changed files with 21 additions and 0 deletions
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15
drivers/net/ethernet/microchip/lan966x/lan966x_regs.h
View File

@@ -585,6 +585,21 @@ 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)

6
drivers/net/ethernet/microchip/lan966x/lan966x_vlan.c
View File

@@ -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)