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net: stmmac: fix TSO and TBS feature enabling during driver open 

TSO and TBS cannot co-exist and current implementation requires two
fixes:

 1) stmmac_open() does not need to call stmmac_enable_tbs() because
    the MAC is reset in stmmac_init_dma_engine() anyway.
 2) Inside stmmac_hw_setup(), we should call stmmac_enable_tso() for
    TX Q that is _not_ configured for TBS.

Fixes: 579a25a854 ("net: stmmac: Initial support for TBS")
Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ong Boon Leong 2021-04-21 17:11:49 +08:00 committed by David S. Miller
parent 90b669d65d
commit 5e6038b88a
1 changed files with 9 additions and 3 deletions
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12
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -2757,8 +2757,15 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp)
/* Enable TSO */
if (priv->tso) {
for (chan = 0; chan < tx_cnt; chan++)
for (chan = 0; chan < tx_cnt; chan++) {
struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan];
/* TSO and TBS cannot co-exist */
if (tx_q->tbs & STMMAC_TBS_AVAIL)
continue;
stmmac_enable_tso(priv, priv->ioaddr, 1, chan);
}
}
/* Enable Split Header */
@ -2850,9 +2857,8 @@ static int stmmac_open(struct net_device *dev)
struct stmmac_tx_queue *tx_q = &priv->tx_queue[chan];
int tbs_en = priv->plat->tx_queues_cfg[chan].tbs_en;
/* Setup per-TXQ tbs flag before TX descriptor alloc */
tx_q->tbs |= tbs_en ? STMMAC_TBS_AVAIL : 0;
if (stmmac_enable_tbs(priv, priv->ioaddr, tbs_en, chan))
tx_q->tbs &= ~STMMAC_TBS_AVAIL;
}
ret = alloc_dma_desc_resources(priv);