github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-02 11:33:28 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

net: stmmac: Tx coe sw fallback

Browse Source 
Add sw fallback of tx checksum calculation for those tx queues that
don't support tx checksum offloading. DW xGMAC IP can be synthesized
such that it can support tx checksum offloading only for a few
initial tx queues. Also as Serge pointed out, for the DW QoS IP, tx
coe can be individually configured for each tx queue.

So when tx coe is enabled, for any tx queue that doesn't support
tx coe with 'coe-unsupported' flag set will have a sw fallback
happen in the driver for tx checksum calculation when any packets to
be transmitted on these tx queues.

Signed-off-by: Rohan G Thomas <rohan.g.thomas@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rohan G Thomas 2023-09-16 14:33:12 +08:00 committed by David S. Miller
parent 6fb8c20a04
commit 8452a05b2c
3 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -4401,6 +4401,16 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
WARN_ON(tx_q->tx_skbuff[first_entry]);
csum_insertion = (skb->ip_summed == CHECKSUM_PARTIAL);
/* DWMAC IPs can be synthesized to support tx coe only for a few tx
* queues. In that case, checksum offloading for those queues that don't
* support tx coe needs to fallback to software checksum calculation.
*/
if (csum_insertion &&
priv->plat->tx_queues_cfg[queue].coe_unsupported) {
if (unlikely(skb_checksum_help(skb)))
goto dma_map_err;
csum_insertion = !csum_insertion;
}
if (likely(priv->extend_desc))
desc = (struct dma_desc *)(tx_q->dma_etx + entry);

3
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View File

@ -276,6 +276,9 @@ static int stmmac_mtl_setup(struct platform_device *pdev,
plat->tx_queues_cfg[queue].use_prio = true;
}
plat->tx_queues_cfg[queue].coe_unsupported =
of_property_read_bool(q_node, "snps,coe-unsupported");
queue++;
}
if (queue != plat->tx_queues_to_use) {

1
include/linux/stmmac.h
View File

@ -139,6 +139,7 @@ struct stmmac_rxq_cfg {
struct stmmac_txq_cfg {
u32 weight;
bool coe_unsupported;
u8 mode_to_use;
/* Credit Base Shaper parameters */
u32 send_slope;