diff options
| author | David Awogbemila <awogbemila@google.com> | 2021-10-24 11:42:37 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-10-25 14:13:12 +0100 |
| commit | 37149e9374bf7271563f7477ace9014ebc65a8af (patch) | |
| tree | 05877f2c1e56b83ed4c49a87aa2487897f11ee9c /drivers/net/ethernet/google/gve/gve_ethtool.c | |
| parent | 1344e751e91092ac0cb63b194621e59d2f364197 (diff) | |
gve: Implement packet continuation for RX.
This enables the driver to receive RX packets spread across multiple
buffers:
For a given multi-fragment packet the "packet continuation" bit is set
on all descriptors except the last one. These descriptors' payloads are
combined into a single SKB before the SKB is handed to the
networking stack.
This change adds a "packet buffer size" notion for RX queues. The
CreateRxQueue AdminQueue command sent to the device now includes the
packet_buffer_size.
We opt for a packet_buffer_size of PAGE_SIZE / 2 to give the
driver the opportunity to flip pages where we can instead of copying.
Signed-off-by: David Awogbemila <awogbemila@google.com>
Signed-off-by: Jeroen de Borst <jeroendb@google.com>
Reviewed-by: Catherine Sullivan <csully@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve_ethtool.c')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_ethtool.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index 618a3e1d858e..c8df47a97fa4 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -43,6 +43,7 @@ static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = { static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = { "rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_bytes[%u]", + "rx_cont_packet_cnt[%u]", "rx_frag_flip_cnt[%u]", "rx_frag_copy_cnt[%u]", "rx_dropped_pkt[%u]", "rx_copybreak_pkt[%u]", "rx_copied_pkt[%u]", "rx_queue_drop_cnt[%u]", "rx_no_buffers_posted[%u]", "rx_drops_packet_over_mru[%u]", "rx_drops_invalid_checksum[%u]", @@ -265,6 +266,9 @@ gve_get_ethtool_stats(struct net_device *netdev, } while (u64_stats_fetch_retry(&priv->rx[ring].statss, start)); data[i++] = tmp_rx_bytes; + data[i++] = rx->rx_cont_packet_cnt; + data[i++] = rx->rx_frag_flip_cnt; + data[i++] = rx->rx_frag_copy_cnt; /* rx dropped packets */ data[i++] = tmp_rx_skb_alloc_fail + tmp_rx_buf_alloc_fail + |