diff options
| author | Edward Cree | 2020-06-30 13:13:15 +0100 |
|---|---|---|
| committer | David S. Miller | 2020-06-30 13:09:09 -0700 |
| commit | e7a256858f5fb58949c6f03c52e70cc98a4ad542 (patch) | |
| tree | ab6931a7b7364e5a428d9c6f0ee634d1e32578f9 | |
| parent | 93841000ed9fc86dd9615a1048abb31c07792e0b (diff) | |
sfc: factor out efx_tx_tso_header_length() and understand encapsulation
ef100 will need to check this against NIC limits.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/sfc/tx_common.c | 17 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tx_common.h | 1 |
2 files changed, 16 insertions, 2 deletions
diff --git a/drivers/net/ethernet/sfc/tx_common.c b/drivers/net/ethernet/sfc/tx_common.c index 6ac19daa891a..2a058b76d1f0 100644 --- a/drivers/net/ethernet/sfc/tx_common.c +++ b/drivers/net/ethernet/sfc/tx_common.c @@ -311,6 +311,20 @@ struct efx_tx_buffer *efx_tx_map_chunk(struct efx_tx_queue *tx_queue, return buffer; } +int efx_tx_tso_header_length(struct sk_buff *skb) +{ + size_t header_len; + + if (skb->encapsulation) + header_len = skb_inner_transport_header(skb) - + skb->data + + (inner_tcp_hdr(skb)->doff << 2u); + else + header_len = skb_transport_header(skb) - skb->data + + (tcp_hdr(skb)->doff << 2u); + return header_len; +} + /* Map all data from an SKB for DMA and create descriptors on the queue. */ int efx_tx_map_data(struct efx_tx_queue *tx_queue, struct sk_buff *skb, unsigned int segment_count) @@ -339,8 +353,7 @@ int efx_tx_map_data(struct efx_tx_queue *tx_queue, struct sk_buff *skb, /* For TSO we need to put the header in to a separate * descriptor. Map this separately if necessary. */ - size_t header_len = skb_transport_header(skb) - skb->data + - (tcp_hdr(skb)->doff << 2u); + size_t header_len = efx_tx_tso_header_length(skb); if (header_len != len) { tx_queue->tso_long_headers++; diff --git a/drivers/net/ethernet/sfc/tx_common.h b/drivers/net/ethernet/sfc/tx_common.h index 82e2e291317d..cbe995b024a6 100644 --- a/drivers/net/ethernet/sfc/tx_common.h +++ b/drivers/net/ethernet/sfc/tx_common.h @@ -34,6 +34,7 @@ void efx_enqueue_unwind(struct efx_tx_queue *tx_queue, struct efx_tx_buffer *efx_tx_map_chunk(struct efx_tx_queue *tx_queue, dma_addr_t dma_addr, size_t len); +int efx_tx_tso_header_length(struct sk_buff *skb); int efx_tx_map_data(struct efx_tx_queue *tx_queue, struct sk_buff *skb, unsigned int segment_count); |