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net: enetc: move sync packet modification before dma_map_single()

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Move sync packet content modification before dma_map_single() to follow
correct DMA usage process, even though the previous sequence worked due
to hardware DMA-coherence support (LS1028A). But for the upcoming i.MX95,
its ENETC (v4) does not support "dma-coherent", so this step is very
necessary. Otherwise, the originTimestamp and correction fields of the
sent packets will still be the values before the modification.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20250829050615.1247468-13-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Wei Fang 2025-08-29 13:06:13 +08:00 committed by Paolo Abeni
parent d889abaac2
commit 7776d5e6e3
1 changed files with 8 additions and 7 deletions
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15
drivers/net/ethernet/freescale/enetc/enetc.c
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@ -303,6 +303,7 @@ static int enetc_map_tx_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb)
unsigned int f;
dma_addr_t dma;
u8 flags = 0;
u32 tstamp;
enetc_clear_tx_bd(&temp_bd);
if (skb->ip_summed == CHECKSUM_PARTIAL) {
@ -327,6 +328,13 @@ static int enetc_map_tx_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb)
}
}
if (enetc_cb->flag & ENETC_F_TX_ONESTEP_SYNC_TSTAMP) {
do_onestep_tstamp = true;
tstamp = enetc_update_ptp_sync_msg(priv, skb);
} else if (enetc_cb->flag & ENETC_F_TX_TSTAMP) {
do_twostep_tstamp = true;
}
i = tx_ring->next_to_use;
txbd = ENETC_TXBD(*tx_ring, i);
prefetchw(txbd);
@ -346,11 +354,6 @@ static int enetc_map_tx_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb)
count++;
do_vlan = skb_vlan_tag_present(skb);
if (enetc_cb->flag & ENETC_F_TX_ONESTEP_SYNC_TSTAMP)
do_onestep_tstamp = true;
else if (enetc_cb->flag & ENETC_F_TX_TSTAMP)
do_twostep_tstamp = true;
tx_swbd->do_twostep_tstamp = do_twostep_tstamp;
tx_swbd->qbv_en = !!(priv->active_offloads & ENETC_F_QBV);
tx_swbd->check_wb = tx_swbd->do_twostep_tstamp || tx_swbd->qbv_en;
@ -393,8 +396,6 @@ static int enetc_map_tx_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb)
}
if (do_onestep_tstamp) {
u32 tstamp = enetc_update_ptp_sync_msg(priv, skb);
/* Configure extension BD */
temp_bd.ext.tstamp = cpu_to_le32(tstamp);
e_flags |= ENETC_TXBD_E_FLAGS_ONE_STEP_PTP;