[net-next,v2,15/33] ena: add XDP frame size to amazon NIC driver

Message ID 158824569766.2172139.6599250198671333350.stgit@firesoul
State Superseded
Headers show
Series
  • [net-next,v2,01/33] xdp: add frame size to xdp_buff
Related show

Commit Message

Jesper Dangaard Brouer April 30, 2020, 11:21 a.m.
Frame size ENA_PAGE_SIZE is limited to 16K on systems with larger
PAGE_SIZE than 16K. Change ENA_XDP_MAX_MTU to also take into account
the reserved tailroom.

Cc: Arthur Kiyanovski <akiyano@amazon.com>
Acked-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c |    1 +
 drivers/net/ethernet/amazon/ena/ena_netdev.h |    5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 2cc765df8da3..0fd7db1769f8 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -1606,6 +1606,7 @@  static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 		  "%s qid %d\n", __func__, rx_ring->qid);
 	res_budget = budget;
 	xdp.rxq = &rx_ring->xdp_rxq;
+	xdp.frame_sz = ENA_PAGE_SIZE;
 
 	do {
 		xdp_verdict = XDP_PASS;
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 97dfd0c67e84..dd00127dfe9f 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -151,8 +151,9 @@ 
  * The buffer size we share with the device is defined to be ENA_PAGE_SIZE
  */
 
-#define ENA_XDP_MAX_MTU (ENA_PAGE_SIZE - ETH_HLEN - ETH_FCS_LEN - \
-				VLAN_HLEN - XDP_PACKET_HEADROOM)
+#define ENA_XDP_MAX_MTU (ENA_PAGE_SIZE - ETH_HLEN - ETH_FCS_LEN -	\
+			 VLAN_HLEN - XDP_PACKET_HEADROOM -		\
+			 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
 
 #define ENA_IS_XDP_INDEX(adapter, index) (((index) >= (adapter)->xdp_first_ring) && \
 	((index) < (adapter)->xdp_first_ring + (adapter)->xdp_num_queues))