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realtek: rtl930x: Disable L3 offloading

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L3 Offloading caused DHCP packets to be dropped at hardware level
And potentially buggy route implementation can cause a crash

Signed-off-by: Harshal Gohel <hg@simonwunderlich.de>
Co-developed-by: Sven Eckelmann <se@simonwunderlich.de>
Signed-off-by: Sven Eckelmann <se@simonwunderlich.de>
Link: https://github.com/openwrt/openwrt/pull/20208
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Harshal Gohel 2025-07-15 20:20:00 +02:00 committed by Robert Marko
parent 5faf91ab8d
commit 843e8a47e2
8 changed files with 21 additions and 0 deletions
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4
target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/Kconfig
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@ -5,3 +5,7 @@ config NET_DSA_RTL83XX
select NET_DSA_TAG_TRAILER
help
This driver adds support for Realtek RTL83xx series switching.
config NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD
bool "Realtek RTL930x layer 3 offload (experimental)"
depends on NET_DSA_RTL83XX

11
target/linux/realtek/files-6.12/drivers/net/dsa/rtl83xx/rtl930x.c
View File

@ -907,6 +907,9 @@ static void rtl930x_init_eee(struct rtl838x_switch_priv *priv, bool enable)
priv->eee_enabled = enable;
}
#ifdef CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD
#define HASH_PICK(val, lsb, len) ((val & (((1 << len) - 1) << lsb)) >> lsb)
static u32 rtl930x_l3_hash4(u32 ip, int algorithm, bool move_dip)
@ -1460,6 +1463,8 @@ static void rtl930x_set_l3_nexthop(int idx, u16 dmac_id, u16 interface)
rtl_table_release(r);
}
#endif /* CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD */
static void rtl930x_pie_lookup_enable(struct rtl838x_switch_priv *priv, int index)
{
int block = index / PIE_BLOCK_SIZE;
@ -1987,6 +1992,8 @@ static void rtl930x_pie_init(struct rtl838x_switch_priv *priv)
}
#ifdef CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD
/* Sets up an egress interface for L3 actions
* Actions for ip4/6_icmp_redirect, ip4/6_pbr_icmp_redirect are:
* 0: FORWARD, 1: DROP, 2: TRAP2CPU, 3: COPY2CPU, 4: TRAP2MASTERCPU 5: COPY2MASTERCPU
@ -2193,6 +2200,8 @@ static int rtl930x_l3_setup(struct rtl838x_switch_priv *priv)
return 0;
}
#endif /* CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD */
static u32 rtl930x_packet_cntr_read(int counter)
{
u32 v;
@ -2508,6 +2517,7 @@ const struct rtl838x_reg rtl930x_reg = {
.l2_learning_setup = rtl930x_l2_learning_setup,
.packet_cntr_read = rtl930x_packet_cntr_read,
.packet_cntr_clear = rtl930x_packet_cntr_clear,
#ifdef CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD
.route_read = rtl930x_route_read,
.route_write = rtl930x_route_write,
.host_route_write = rtl930x_host_route_write,
@ -2521,6 +2531,7 @@ const struct rtl838x_reg rtl930x_reg = {
.get_l3_router_mac = rtl930x_get_l3_router_mac,
.set_l3_router_mac = rtl930x_set_l3_router_mac,
.set_l3_egress_intf = rtl930x_set_l3_egress_intf,
#endif
.set_distribution_algorithm = rtl930x_set_distribution_algorithm,
.led_init = rtl930x_led_init,
.enable_learning = rtldsa_930x_enable_learning,

1
target/linux/realtek/rtl838x/config-6.12
View File

@ -173,6 +173,7 @@ CONFIG_NEED_PER_CPU_KM=y
CONFIG_NET_DEVLINK=y
CONFIG_NET_DSA=y
CONFIG_NET_DSA_RTL83XX=y
# CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD is not set
CONFIG_NET_DSA_TAG_TRAILER=y
CONFIG_NET_EGRESS=y
CONFIG_NET_INGRESS=y

1
target/linux/realtek/rtl839x/config-6.12
View File

@ -176,6 +176,7 @@ CONFIG_NEED_SRCU_NMI_SAFE=y
CONFIG_NET_DEVLINK=y
CONFIG_NET_DSA=y
CONFIG_NET_DSA_RTL83XX=y
# CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD is not set
CONFIG_NET_DSA_TAG_TRAILER=y
CONFIG_NET_EGRESS=y
CONFIG_NET_FLOW_LIMIT=y

1
target/linux/realtek/rtl930x/config-6.12
View File

@ -158,6 +158,7 @@ CONFIG_NEED_PER_CPU_KM=y
CONFIG_NET_DEVLINK=y
CONFIG_NET_DSA=y
CONFIG_NET_DSA_RTL83XX=y
# CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD is not set
CONFIG_NET_DSA_TAG_TRAILER=y
CONFIG_NET_EGRESS=y
CONFIG_NET_FLOW_LIMIT=y

1
target/linux/realtek/rtl930x_nand/config-6.12
View File

@ -165,6 +165,7 @@ CONFIG_NEED_PER_CPU_KM=y
CONFIG_NET_DEVLINK=y
CONFIG_NET_DSA=y
CONFIG_NET_DSA_RTL83XX=y
# CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD is not set
CONFIG_NET_DSA_TAG_TRAILER=y
CONFIG_NET_EGRESS=y
CONFIG_NET_FLOW_LIMIT=y

1
target/linux/realtek/rtl931x/config-6.12
View File

@ -169,6 +169,7 @@ CONFIG_NEED_SRCU_NMI_SAFE=y
CONFIG_NET_DEVLINK=y
CONFIG_NET_DSA=y
CONFIG_NET_DSA_RTL83XX=y
# CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD is not set
CONFIG_NET_DSA_TAG_TRAILER=y
CONFIG_NET_EGRESS=y
CONFIG_NET_FLOW_LIMIT=y

1
target/linux/realtek/rtl931x_nand/config-6.12
View File

@ -176,6 +176,7 @@ CONFIG_NEED_SRCU_NMI_SAFE=y
CONFIG_NET_DEVLINK=y
CONFIG_NET_DSA=y
CONFIG_NET_DSA_RTL83XX=y
# CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD is not set
CONFIG_NET_DSA_TAG_TRAILER=y
CONFIG_NET_EGRESS=y
CONFIG_NET_FLOW_LIMIT=y