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net: stmmac: dwmac-sunxi: Provide TX and RX fifo sizes 

After commit bfcb813203 ("net: dsa:
configure the MTU for switch ports") my Lamobo R1 platform which uses
an allwinner,sun7i-a20-gmac compatible Ethernet MAC started to fail
by rejecting a MTU of 1536. The reason for that is that the DMA
capabilities are not readable on this version of the IP, and there
is also no 'tx-fifo-depth' property being provided in Device Tree. The
property is documented as optional, and is not provided.

Chen-Yu indicated that the FIFO sizes are 4KB for TX and 16KB for RX, so
provide these values through platform data as an immediate fix until
various Device Tree sources get updated accordingly.

Fixes: eaf4fac478 ("net: stmmac: Do not accept invalid MTU values")
Suggested-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2020-04-14 15:39:52 -07:00 committed by David S. Miller
parent e045124e93
commit 806fd188ce
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/stmicro/stmmac/dwmac-sunxi.c
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@ -150,6 +150,8 @@ static int sun7i_gmac_probe(struct platform_device *pdev)
plat_dat->init = sun7i_gmac_init;
plat_dat->exit = sun7i_gmac_exit;
plat_dat->fix_mac_speed = sun7i_fix_speed;
plat_dat->tx_fifo_size = 4096;
plat_dat->rx_fifo_size = 16384;
ret = sun7i_gmac_init(pdev, plat_dat->bsp_priv);
if (ret)