[dpdk-dev] [PATCH v2 5/5] i40evf: support of configurable crc stripping in VF

[Helin Zhang <helin.zhang@intel.com>]

Configurable crc stripping is supported in DPDK PF host,
while not in Linux PF host. Two functions have been
defined to talk with the those PF hosts respectively.

v2 changes:
* Put configuring crc stripping in VF into a single patch.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Reviewed-by: Jingjing Wu <jingjing.wu@intel.com>
Reviewed-by: Jing Chen <jing.d.chen@intel.com>
---
 lib/librte_pmd_i40e/i40e_ethdev_vf.c | 133 +++++++++++++++++++++++++++--------
 1 file changed, 102 insertions(+), 31 deletions(-)

diff --git a/lib/librte_pmd_i40e/i40e_ethdev_vf.c b/lib/librte_pmd_i40e/i40e_ethdev_vf.c
index 113bff8..af5a0f3 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev_vf.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev_vf.c
@@ -523,8 +523,9 @@ i40evf_config_vlan_pvid(struct rte_eth_dev *dev,
 	return err;
 }
 
+/* It configures VSI queues without extra configuration */
 static int
-i40evf_configure_queues(struct rte_eth_dev *dev)
+i40evf_configure_vsi_queues(struct rte_eth_dev *dev)
 {
 	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
 	struct i40e_rx_queue **rxq =
@@ -533,13 +534,13 @@ i40evf_configure_queues(struct rte_eth_dev *dev)
 		(struct i40e_tx_queue **)dev->data->tx_queues;
 	struct i40e_virtchnl_vsi_queue_config_info *vc_vqci;
 	struct i40e_virtchnl_queue_pair_info *vc_qpi;
-	int size, i, nb_qp, ret, num_rxq, num_txq;
 	struct vf_cmd_info args;
-	struct rte_pktmbuf_pool_private *mbp_priv;
+	int size, i, nb_qp, ret;
 
 	nb_qp = vf->num_queue_pairs;
-	size = sizeof(*vc_vqci) + sizeof(*vc_qpi) * nb_qp;
-	vc_vqci = rte_zmalloc("vc_vqci", size, 0);
+	size = sizeof(struct i40e_virtchnl_vsi_queue_config_info) +
+		sizeof(struct i40e_virtchnl_queue_pair_info) * nb_qp;
+	vc_vqci = rte_zmalloc("queue_info", size, 0);
 	if (!vc_vqci) {
 		PMD_DRV_LOG(ERR, "Failed to allocate memory for VF "
 					"configuring queues\n");
@@ -547,62 +548,132 @@ i40evf_configure_queues(struct rte_eth_dev *dev)
 	}
 	vc_vqci->vsi_id = vf->vsi_res->vsi_id;
 	vc_vqci->num_queue_pairs = nb_qp;
-	vc_qpi = vc_vqci->qpair;
 
-	num_rxq = dev->data->nb_rx_queues;
-	num_txq = dev->data->nb_tx_queues;
-	/*
-	 * PF host driver required to configure queues in pairs, which means
-	 * rxq_num should equals to txq_num. The actual usage won't always
-	 * work that way. The solution is fills 0 with HW ring option in case
-	 * they are not equal.
-	 */
-	for (i = 0; i < nb_qp; i++) {
-		/*Fill TX info */
+	for (i = 0, vc_qpi = vc_vqci->qpair; i < nb_qp; i++, vc_qpi++) {
 		vc_qpi->txq.vsi_id = vc_vqci->vsi_id;
 		vc_qpi->txq.queue_id = i;
-		if (i < num_txq) {
+		if (i < dev->data->nb_tx_queues) {
 			vc_qpi->txq.ring_len = txq[i]->nb_tx_desc;
 			vc_qpi->txq.dma_ring_addr = txq[i]->tx_ring_phys_addr;
-		} else {
-			vc_qpi->txq.ring_len = 0;
-			vc_qpi->txq.dma_ring_addr = 0;
 		}
 
-		/* Fill RX info */
 		vc_qpi->rxq.vsi_id = vc_vqci->vsi_id;
 		vc_qpi->rxq.queue_id = i;
 		vc_qpi->rxq.max_pkt_size = vf->max_pkt_len;
-		if (i < num_rxq) {
+		if (i < dev->data->nb_rx_queues) {
+			struct rte_pktmbuf_pool_private *mbp_priv;
+
+			vc_qpi->rxq.ring_len = rxq[i]->nb_rx_desc;
+			vc_qpi->rxq.dma_ring_addr = rxq[i]->rx_ring_phys_addr;
 			mbp_priv = rte_mempool_get_priv(rxq[i]->mp);
 			vc_qpi->rxq.databuffer_size =
 				mbp_priv->mbuf_data_room_size -
 					RTE_PKTMBUF_HEADROOM;
+		}
+	}
+	memset(&args, 0, sizeof(args));
+	args.ops = I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES;
+	args.in_args = (uint8_t *)vc_vqci;
+	args.in_args_size = size;
+	args.out_buffer = cmd_result_buffer;
+	args.out_size = I40E_AQ_BUF_SZ;
+	ret = i40evf_execute_vf_cmd(dev, &args);
+	if (ret)
+		PMD_DRV_LOG(ERR, "Failed to execute command of "
+			"I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES\n");
+	rte_free(vc_vqci);
+
+	return ret;
+}
+
+/* It configures VSI queues with extra configuration of crc stripping */
+static int
+i40evf_configure_vsi_queues_ex(struct rte_eth_dev *dev)
+{
+	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+	struct i40e_rx_queue **rxq =
+		(struct i40e_rx_queue **)dev->data->rx_queues;
+	struct i40e_tx_queue **txq =
+		(struct i40e_tx_queue **)dev->data->tx_queues;
+	struct i40e_virtchnl_vsi_queue_config_info *vc_vqci;
+	struct i40e_virtchnl_queue_pair_info *vc_qpi;
+	struct i40e_virtchnl_queue_pair_extra_info *vc_qpei;
+	struct vf_cmd_info args;
+	int size, i, nb_qp, ret;
+
+	nb_qp = vf->num_queue_pairs;
+	size = sizeof(struct i40e_virtchnl_vsi_queue_config_info) +
+		sizeof(struct i40e_virtchnl_queue_pair_info) * nb_qp +
+		sizeof(struct i40e_virtchnl_queue_pair_extra_info) * nb_qp;
+	vc_vqci = rte_zmalloc("queue_info", size, 0);
+	if (!vc_vqci) {
+		PMD_DRV_LOG(ERR, "Failed to allocate memory for VF "
+					"configuring queues\n");
+		return -ENOMEM;
+	}
+	vc_vqci->vsi_id = vf->vsi_res->vsi_id;
+	vc_vqci->num_queue_pairs = nb_qp;
+	vc_qpi = vc_vqci->qpair;
+	vc_qpei = (struct i40e_virtchnl_queue_pair_extra_info *)
+		(((uint8_t *)vc_vqci->qpair) +
+		sizeof(struct i40e_virtchnl_queue_pair_info) * nb_qp);
+
+	for (i = 0; i < nb_qp; i++, vc_qpi++, vc_qpei++) {
+		vc_qpi->txq.vsi_id = vc_vqci->vsi_id;
+		vc_qpi->txq.queue_id = i;
+		if (i < dev->data->nb_tx_queues) {
+			vc_qpi->txq.ring_len = txq[i]->nb_tx_desc;
+			vc_qpi->txq.dma_ring_addr = txq[i]->tx_ring_phys_addr;
+		}
+		vc_qpi->rxq.vsi_id = vc_vqci->vsi_id;
+		vc_qpi->rxq.queue_id = i;
+		vc_qpi->rxq.max_pkt_size = vf->max_pkt_len;
+		if (i < dev->data->nb_rx_queues) {
+			struct rte_pktmbuf_pool_private *mbp_priv;
+
 			vc_qpi->rxq.ring_len = rxq[i]->nb_rx_desc;
 			vc_qpi->rxq.dma_ring_addr = rxq[i]->rx_ring_phys_addr;
-		} else {
-			vc_qpi->rxq.ring_len = 0;
-			vc_qpi->rxq.dma_ring_addr = 0;
-			vc_qpi->rxq.databuffer_size = 0;
+			mbp_priv = rte_mempool_get_priv(rxq[i]->mp);
+			vc_qpi->rxq.databuffer_size =
+				mbp_priv->mbuf_data_room_size -
+					RTE_PKTMBUF_HEADROOM;
+			/*
+			 * It adds extra info for configuring VSI queues, which
+			 * is needed to enable the configurable crc stripping
+			 * in VF.
+			 */
+			vc_qpei->crcstrip =
+				dev->data->dev_conf.rxmode.hw_strip_crc;
 		}
-		vc_qpi++;
 	}
-
-	args.ops = I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES;
+	memset(&args, 0, sizeof(args));
+	args.ops =
+		(enum i40e_virtchnl_ops)I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES_EX;
 	args.in_args = (uint8_t *)vc_vqci;
 	args.in_args_size = size;
 	args.out_buffer = cmd_result_buffer;
 	args.out_size = I40E_AQ_BUF_SZ;
 	ret = i40evf_execute_vf_cmd(dev, &args);
 	if (ret)
-		PMD_DRV_LOG(ERR, "fail to execute command "
-				"OP_CONFIG_VSI_QUEUES\n");
+		PMD_DRV_LOG(ERR, "Failed to execute command of "
+			"I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES_EX\n");
 	rte_free(vc_vqci);
 
 	return ret;
 }
 
 static int
+i40evf_configure_queues(struct rte_eth_dev *dev)
+{
+	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+
+	if (vf->host_is_dpdk) /* To support DPDK PF host */
+		return i40evf_configure_vsi_queues_ex(dev);
+	else /* To support Linux PF host */
+		return i40evf_configure_vsi_queues(dev);
+}
+
+static int
 i40evf_config_irq_map(struct rte_eth_dev *dev)
 {
 	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
-- 
1.8.1.4