From 37149e9374bf7271563f7477ace9014ebc65a8af Mon Sep 17 00:00:00 2001 From: David Awogbemila Date: Sun, 24 Oct 2021 11:42:37 -0700 Subject: 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 Signed-off-by: Jeroen de Borst Reviewed-by: Catherine Sullivan Signed-off-by: David S. Miller --- drivers/net/ethernet/google/gve/gve_adminq.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/ethernet/google/gve/gve_adminq.c') diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c index af2c1d1535f5..3dfda6da6a96 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.c +++ b/drivers/net/ethernet/google/gve/gve_adminq.c @@ -530,6 +530,7 @@ static int gve_adminq_create_rx_queue(struct gve_priv *priv, u32 queue_index) cpu_to_be64(rx->data.data_bus), cmd.create_rx_queue.index = cpu_to_be32(queue_index); cmd.create_rx_queue.queue_page_list_id = cpu_to_be32(qpl_id); + cmd.create_rx_queue.packet_buffer_size = cpu_to_be16(rx->packet_buffer_size); } else { cmd.create_rx_queue.rx_ring_size = cpu_to_be16(priv->rx_desc_cnt); -- cgit