diff options
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; +} |