[dpdk-dev] [PATCH v6 1/3] net/iavf: support Ethernet CRC strip disable

[Haiyue Wang]

The VF will check the PF's CRC strip capability firstly, then set the
'CRC strip disable' value in the queue configuration according to the
RX CRC offload setting.

Signed-off-by: Haiyue Wang <haiyue.wang at intel.com>
---
 drivers/net/iavf/iavf_ethdev.c | 3 +++
 drivers/net/iavf/iavf_rxtx.c   | 6 +++++-
 drivers/net/iavf/iavf_vchnl.c  | 3 ++-
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 7bf31d4f4..49e6dd125 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -800,6 +800,9 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		DEV_TX_OFFLOAD_MULTI_SEGS |
 		DEV_TX_OFFLOAD_MBUF_FAST_FREE;
 
+	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_CRC)
+		dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_KEEP_CRC;
+
 	dev_info->default_rxconf = (struct rte_eth_rxconf) {
 		.rx_free_thresh = IAVF_DEFAULT_RX_FREE_THRESH,
 		.rx_drop_en = 0,
diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index 21d508b3f..d53d7b984 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -550,11 +550,15 @@ iavf_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
 	rxq->rx_free_thresh = rx_free_thresh;
 	rxq->queue_id = queue_idx;
 	rxq->port_id = dev->data->port_id;
-	rxq->crc_len = 0; /* crc stripping by default */
 	rxq->rx_deferred_start = rx_conf->rx_deferred_start;
 	rxq->rx_hdr_len = 0;
 	rxq->vsi = vsi;
 
+	if (dev->data->dev_conf.rxmode.offloads & DEV_RX_OFFLOAD_KEEP_CRC)
+		rxq->crc_len = RTE_ETHER_CRC_LEN;
+	else
+		rxq->crc_len = 0;
+
 	len = rte_pktmbuf_data_room_size(rxq->mp) - RTE_PKTMBUF_HEADROOM;
 	rxq->rx_buf_len = RTE_ALIGN(len, (1 << IAVF_RXQ_CTX_DBUFF_SHIFT));
 
diff --git a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c
index 25d5cdaf5..c33194cdc 100644
--- a/drivers/net/iavf/iavf_vchnl.c
+++ b/drivers/net/iavf/iavf_vchnl.c
@@ -458,6 +458,7 @@ iavf_get_vf_resource(struct iavf_adapter *adapter)
 		VIRTCHNL_VF_OFFLOAD_FDIR_PF |
 		VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF |
 		VIRTCHNL_VF_OFFLOAD_REQ_QUEUES |
+		VIRTCHNL_VF_OFFLOAD_CRC |
 		VIRTCHNL_VF_LARGE_NUM_QPAIRS;
 
 	args.in_args = (uint8_t *)∩︀
@@ -853,7 +854,7 @@ iavf_configure_queues(struct iavf_adapter *adapter,
 		vc_qp->rxq.ring_len = rxq[i]->nb_rx_desc;
 		vc_qp->rxq.dma_ring_addr = rxq[i]->rx_ring_phys_addr;
 		vc_qp->rxq.databuffer_size = rxq[i]->rx_buf_len;
-
+		vc_qp->rxq.crc_disable = rxq[i]->crc_len != 0 ? 1 : 0;
 #ifndef RTE_LIBRTE_IAVF_16BYTE_RX_DESC
 		if (vf->vf_res->vf_cap_flags &
 		    VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC &&
-- 
2.30.0