[RFC v3 08/10] net/gve: enable Tx checksum offload for DQO

[Junfeng Guo]

Enable Tx checksum offload once any flag of L4 checksum is set.

Signed-off-by: Junfeng Guo <junfeng.guo at intel.com>
Signed-off-by: Rushil Gupta <rushilg at google.com>
Signed-off-by: Jordan Kimbrough <jrkim at google.com>
Signed-off-by: Jeroen de Borst <jeroendb at google.com>
---
 drivers/net/gve/gve_ethdev.h | 4 ++++
 drivers/net/gve/gve_tx_dqo.c | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/net/gve/gve_ethdev.h b/drivers/net/gve/gve_ethdev.h
index a8e0dd5f3d..bca6e86ef0 100644
--- a/drivers/net/gve/gve_ethdev.h
+++ b/drivers/net/gve/gve_ethdev.h
@@ -38,6 +38,10 @@
 #define GVE_MAX_MTU	RTE_ETHER_MTU
 #define GVE_MIN_MTU	RTE_ETHER_MIN_MTU
 
+#define GVE_TX_CKSUM_OFFLOAD_MASK (		\
+		RTE_MBUF_F_TX_L4_MASK  |	\
+		RTE_MBUF_F_TX_TCP_SEG)
+
 /* A list of pages registered with the device during setup and used by a queue
  * as buffers
  */
diff --git a/drivers/net/gve/gve_tx_dqo.c b/drivers/net/gve/gve_tx_dqo.c
index 450cf71a6b..e925d6c3d0 100644
--- a/drivers/net/gve/gve_tx_dqo.c
+++ b/drivers/net/gve/gve_tx_dqo.c
@@ -77,6 +77,7 @@ gve_tx_burst_dqo(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 	uint16_t mask, sw_mask;
 	uint16_t nb_to_clean;
 	uint16_t nb_tx = 0;
+	uint64_t ol_flags;
 	uint16_t nb_used;
 	uint16_t tx_id;
 	uint16_t sw_id;
@@ -103,6 +104,7 @@ gve_tx_burst_dqo(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 		if (txq->nb_free < tx_pkt->nb_segs)
 			break;
 
+		ol_flags = tx_pkt->ol_flags;
 		nb_used = tx_pkt->nb_segs;
 
 		do {
@@ -127,6 +129,9 @@ gve_tx_burst_dqo(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
 		/* fill the last descriptor with End of Packet (EOP) bit */
 		txd->pkt.end_of_packet = 1;
 
+		if (ol_flags & GVE_TX_CKSUM_OFFLOAD_MASK)
+			txd->pkt.checksum_offload_enable = 1;
+
 		txq->nb_free -= nb_used;
 		txq->nb_used += nb_used;
 	}
-- 
2.34.1