[PATCH net-next] net: macb: Adding support for Jumbo Frames up to 10240 Bytes in SAMA5D2

From: Aleksander Jan Bajkowski
Date: Thu Oct 03 2024 - 13:20:00 EST


As per the SAMA5D2 device specification it supports Jumbo frames.
But the suggested flag and length of bytes it supports was not updated
in this driver config_structure.
The maximum jumbo frames the device supports:
10240 bytes as per the device spec.

While changing the MTU value greater than 1500, it threw error:
sudo ifconfig eth1 mtu 9000
SIOCSIFMTU: Invalid argument

Add this support to driver so that it works as expected and designed.

Signed-off-by: Aleksander Jan Bajkowski <olek2@xxxxx>
---
drivers/net/ethernet/cadence/macb_main.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index f06babec04a0..9fda16557509 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -4841,10 +4841,11 @@ static const struct macb_config pc302gem_config = {
};

static const struct macb_config sama5d2_config = {
- .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
+ .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_JUMBO,
.dma_burst_length = 16,
.clk_init = macb_clk_init,
.init = macb_init,
+ .jumbo_max_len = 10240,
.usrio = &macb_default_usrio,
};

--
2.39.5