diff options
| author | Edward Cree <ecree@solarflare.com> | 2020-06-30 15:12:17 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-30 23:09:09 +0300 |
| commit | 740acc15c8a52c959111a9fbad974e9b0e5b4eb7 (patch) | |
| tree | d1cad13ae1dc41b20165be3826e7d3cc533ed6b5 /drivers/net/ethernet/sfc/tx_common.c | |
| parent | 80a0074e6aee3657784744ed66ca2c0cc918ecf8 (diff) | |
| download | linux-740acc15c8a52c959111a9fbad974e9b0e5b4eb7.tar.xz | |
sfc: commonise TSO fallback code
ef100 will need this if it gets GSO skbs it can't handle (e.g. too long
header length).
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/sfc/tx_common.c')
| -rw-r--r-- | drivers/net/ethernet/sfc/tx_common.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/tx_common.c b/drivers/net/ethernet/sfc/tx_common.c index 70876df1da69..9a005e7c2c68 100644 --- a/drivers/net/ethernet/sfc/tx_common.c +++ b/drivers/net/ethernet/sfc/tx_common.c @@ -405,3 +405,30 @@ unsigned int efx_tx_max_skb_descs(struct efx_nic *efx) return max_descs; } + +/* + * Fallback to software TSO. + * + * This is used if we are unable to send a GSO packet through hardware TSO. + * This should only ever happen due to per-queue restrictions - unsupported + * packets should first be filtered by the feature flags. + * + * Returns 0 on success, error code otherwise. + */ +int efx_tx_tso_fallback(struct efx_tx_queue *tx_queue, struct sk_buff *skb) +{ + struct sk_buff *segments, *next; + + segments = skb_gso_segment(skb, 0); + if (IS_ERR(segments)) + return PTR_ERR(segments); + + dev_consume_skb_any(skb); + + skb_list_walk_safe(segments, skb, next) { + skb_mark_not_on_list(skb); + efx_enqueue_skb(tx_queue, skb); + } + + return 0; +} |