[dpdk-dev] [PATCH v3 6/7] net/mlx4: convert to new Tx offloads API

[Shahaf Shuler <shahafs@mellanox.com>]

Ethdev Tx offloads API has changed since:

commit cba7f53b717d ("ethdev: introduce Tx queue offloads API")

This commit support the new Tx offloads API.

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
---
 drivers/net/mlx4/mlx4_ethdev.c |  7 +---
 drivers/net/mlx4/mlx4_rxtx.h   |  1 +
 drivers/net/mlx4/mlx4_txq.c    | 69 +++++++++++++++++++++++++++++++++++--
 3 files changed, 68 insertions(+), 9 deletions(-)

diff --git a/drivers/net/mlx4/mlx4_ethdev.c b/drivers/net/mlx4/mlx4_ethdev.c
index 2f69e7d4f..3602f0ad8 100644
--- a/drivers/net/mlx4/mlx4_ethdev.c
+++ b/drivers/net/mlx4/mlx4_ethdev.c
@@ -767,17 +767,12 @@ mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 	info->max_tx_queues = max;
 	info->max_mac_addrs = RTE_DIM(priv->mac);
 	info->rx_offload_capa = 0;
-	info->tx_offload_capa = 0;
+	info->tx_offload_capa = mlx4_get_tx_port_offloads(priv);
 	if (priv->hw_csum) {
-		info->tx_offload_capa |= (DEV_TX_OFFLOAD_IPV4_CKSUM |
-					  DEV_TX_OFFLOAD_UDP_CKSUM |
-					  DEV_TX_OFFLOAD_TCP_CKSUM);
 		info->rx_offload_capa |= (DEV_RX_OFFLOAD_IPV4_CKSUM |
 					  DEV_RX_OFFLOAD_UDP_CKSUM |
 					  DEV_RX_OFFLOAD_TCP_CKSUM);
 	}
-	if (priv->hw_csum_l2tun)
-		info->tx_offload_capa |= DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM;
 	if (mlx4_get_ifname(priv, &ifname) == 0)
 		info->if_index = if_nametoindex(ifname);
 	info->hash_key_size = MLX4_RSS_HASH_KEY_SIZE;
diff --git a/drivers/net/mlx4/mlx4_rxtx.h b/drivers/net/mlx4/mlx4_rxtx.h
index b93e2bcda..bff5ae43d 100644
--- a/drivers/net/mlx4/mlx4_rxtx.h
+++ b/drivers/net/mlx4/mlx4_rxtx.h
@@ -180,6 +180,7 @@ uint16_t mlx4_rx_burst_removed(void *dpdk_rxq, struct rte_mbuf **pkts,
 
 /* mlx4_txq.c */
 
+uint64_t mlx4_get_tx_port_offloads(struct priv *priv);
 int mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx,
 			uint16_t desc, unsigned int socket,
 			const struct rte_eth_txconf *conf);
diff --git a/drivers/net/mlx4/mlx4_txq.c b/drivers/net/mlx4/mlx4_txq.c
index d651e4980..7664c3e1a 100644
--- a/drivers/net/mlx4/mlx4_txq.c
+++ b/drivers/net/mlx4/mlx4_txq.c
@@ -41,6 +41,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
+#include <inttypes.h>
 
 /* Verbs headers do not support -pedantic. */
 #ifdef PEDANTIC
@@ -182,6 +183,50 @@ mlx4_txq_fill_dv_obj_info(struct txq *txq, struct mlx4dv_obj *mlxdv)
 }
 
 /**
+ * Returns the per-port supported offloads.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ *
+ * @return
+ *   Supported Tx offloads.
+ */
+uint64_t
+mlx4_get_tx_port_offloads(struct priv *priv)
+{
+	uint64_t offloads = DEV_TX_OFFLOAD_MULTI_SEGS;
+
+	if (priv->hw_csum) {
+		offloads |= (DEV_TX_OFFLOAD_IPV4_CKSUM |
+			     DEV_TX_OFFLOAD_UDP_CKSUM |
+			     DEV_TX_OFFLOAD_TCP_CKSUM);
+	}
+	if (priv->hw_csum_l2tun)
+		offloads |= DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM;
+	return offloads;
+}
+
+/**
+ * Checks if the per-queue offload configuration is valid.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param requested
+ *   Per-queue offloads configuration.
+ *
+ * @return
+ *   Nonzero when configuration is valid.
+ */
+static int
+mlx4_check_tx_queue_offloads(struct priv *priv, uint64_t requested)
+{
+	uint64_t mandatory = priv->dev->data->dev_conf.txmode.offloads;
+	uint64_t supported = mlx4_get_tx_port_offloads(priv);
+
+	return !((mandatory ^ requested) & supported);
+}
+
+/**
  * DPDK callback to configure a Tx queue.
  *
  * @param dev
@@ -229,9 +274,22 @@ mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 	};
 	int ret;
 
-	(void)conf; /* Thresholds configuration (ignored). */
 	DEBUG("%p: configuring queue %u for %u descriptors",
 	      (void *)dev, idx, desc);
+	/*
+	 * Don't verify port offloads for application which
+	 * use the old API.
+	 */
+	if ((conf->txq_flags & ETH_TXQ_FLAGS_IGNORE) &&
+	    !mlx4_check_tx_queue_offloads(priv, conf->offloads)) {
+		rte_errno = ENOTSUP;
+		ERROR("%p: Tx queue offloads 0x%" PRIx64 " don't match port "
+		      "offloads 0x%" PRIx64 " or supported offloads 0x%" PRIx64,
+		      (void *)dev, conf->offloads,
+		      dev->data->dev_conf.txmode.offloads,
+		      mlx4_get_tx_port_offloads(priv));
+		return -rte_errno;
+	}
 	if (idx >= dev->data->nb_tx_queues) {
 		rte_errno = EOVERFLOW;
 		ERROR("%p: queue index out of range (%u >= %u)",
@@ -281,8 +339,13 @@ mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 			RTE_MIN(MLX4_PMD_TX_PER_COMP_REQ, desc / 4),
 		.elts_comp_cd_init =
 			RTE_MIN(MLX4_PMD_TX_PER_COMP_REQ, desc / 4),
-		.csum = priv->hw_csum,
-		.csum_l2tun = priv->hw_csum_l2tun,
+		.csum = priv->hw_csum &&
+			(conf->offloads & (DEV_TX_OFFLOAD_IPV4_CKSUM |
+					   DEV_TX_OFFLOAD_UDP_CKSUM |
+					   DEV_TX_OFFLOAD_TCP_CKSUM)),
+		.csum_l2tun = priv->hw_csum_l2tun &&
+			      (conf->offloads &
+			       DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM),
 		/* Enable Tx loopback for VF devices. */
 		.lb = !!priv->vf,
 		.bounce_buf = bounce_buf,
-- 
2.12.0