Commit 48febf7e authored by Giuseppe CAVALLARO's avatar Giuseppe CAVALLARO Committed by David S. Miller

stmmac: allow mtu bigger than 1500 in case of normal desc (V4)

This patch allows to set the mtu bigger than 1500
in case of normal descriptors.
This is helping some SPEAr customers.
Signed-off-by: default avatarDeepak SIKRI <deepak.sikri@st.com>
Signed-off-by: default avatarGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 51e3137b
......@@ -126,6 +126,7 @@ static void ndesc_init_rx_desc(struct dma_desc *p, unsigned int ring_size,
for (i = 0; i < ring_size; i++) {
p->des01.rx.own = 1;
p->des01.rx.buffer1_size = BUF_SIZE_2KiB - 1;
p->des01.rx.buffer2_size = BUF_SIZE_2KiB - 1;
if (i == ring_size - 1)
p->des01.rx.end_ring = 1;
if (disable_rx_ic)
......@@ -183,6 +184,11 @@ static void ndesc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
int csum_flag)
{
p->des01.tx.first_segment = is_fs;
if (unlikely(len > BUF_SIZE_2KiB)) {
p->des01.etx.buffer1_size = BUF_SIZE_2KiB - 1;
p->des01.etx.buffer2_size = len - p->des01.etx.buffer1_size;
} else
p->des01.tx.buffer1_size = len;
}
......
......@@ -1412,10 +1412,10 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
return -EBUSY;
}
if (priv->plat->has_gmac)
if (priv->plat->enh_desc)
max_mtu = JUMBO_LEN;
else
max_mtu = ETH_DATA_LEN;
max_mtu = BUF_SIZE_4KiB;
if ((new_mtu < 46) || (new_mtu > max_mtu)) {
pr_err("%s: invalid MTU, max MTU is: %d\n", dev->name, max_mtu);
......
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