[dpdk-dev] [PATCH 4/4] ethdev: add helpers to move to the new offloads API

[Shahaf Shuler]

A new offloads API was introduced by commits:

commit 121fff673172 ("ethdev: introduce Rx queue offloads API")
commit 35ac80d92f29 ("ethdev: introduce Tx queue offloads API")

In order to enable the PMDs to support only one of the APIs,
a conversion functions from the old to new API were added.

Signed-off-by: Shahaf Shuler <shahafs at mellanox.com>
---
 lib/librte_ether/rte_ethdev.c | 99 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 97 insertions(+), 2 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 50f8aa98d..1aa21a129 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1006,6 +1006,34 @@ rte_eth_dev_close(uint8_t port_id)
 	dev->data->tx_queues = NULL;
 }
 
+/**
+ * A conversion function from rxmode offloads API to rte_eth_rxq_conf
+ * offloads API.
+ */
+static void
+rte_eth_convert_rxmode_offloads(struct rte_eth_rxmode *rxmode,
+				struct rte_eth_rxq_conf *rxq_conf)
+{
+	if (rxmode->header_split == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_HEADER_SPLIT;
+	if (rxmode->hw_ip_checksum == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_CHECKSUM;
+	if (rxmode->hw_vlan_filter == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_VLAN_FILTER;
+	if (rxmode->hw_vlan_strip == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
+	if (rxmode->hw_vlan_extend == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_VLAN_EXTEND;
+	if (rxmode->jumbo_frame == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
+	if (rxmode->hw_strip_crc == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_CRC_STRIP;
+	if (rxmode->enable_scatter == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_SCATTER;
+	if (rxmode->enable_lro == 1)
+		rxq_conf->offloads |= DEV_RX_OFFLOAD_TCP_LRO;
+}
+
 int
 rte_eth_rx_queue_setup(uint8_t port_id, uint16_t rx_queue_id,
 		       uint16_t nb_rx_desc, unsigned int socket_id,
@@ -1016,6 +1044,8 @@ rte_eth_rx_queue_setup(uint8_t port_id, uint16_t rx_queue_id,
 	uint32_t mbp_buf_size;
 	struct rte_eth_dev *dev;
 	struct rte_eth_dev_info dev_info;
+	struct rte_eth_rxq_conf rxq_trans_conf;
+	/* Holds translated configuration to be passed to the PMD */
 	void **rxq;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
@@ -1062,6 +1092,11 @@ rte_eth_rx_queue_setup(uint8_t port_id, uint16_t rx_queue_id,
 		return -EINVAL;
 	}
 
+	if ((!(dev->data->dev_flags & RTE_ETH_DEV_RXQ_OFFLOAD)) &&
+	    (dev->data->dev_conf.rxmode.ignore_offloads == 1)) {
+		return -ENOTSUP;
+	}
+
 	if (nb_rx_desc > dev_info.rx_desc_lim.nb_max ||
 			nb_rx_desc < dev_info.rx_desc_lim.nb_min ||
 			nb_rx_desc % dev_info.rx_desc_lim.nb_align != 0) {
@@ -1086,8 +1121,15 @@ rte_eth_rx_queue_setup(uint8_t port_id, uint16_t rx_queue_id,
 	if (rx_conf == NULL)
 		rx_conf = &dev_info.default_rxconf;
 
+	rxq_trans_conf = *rx_conf;
+	if ((dev->data->dev_flags & RTE_ETH_DEV_RXQ_OFFLOAD) &&
+	    (dev->data->dev_conf.rxmode.ignore_offloads == 0)) {
+		rte_eth_convert_rxmode_offloads(&dev->data->dev_conf.rxmode,
+						&rxq_trans_conf);
+	}
+
 	ret = (*dev->dev_ops->rx_queue_setup)(dev, rx_queue_id, nb_rx_desc,
-					      socket_id, rx_conf, mp);
+					      socket_id, &rxq_trans_conf, mp);
 	if (!ret) {
 		if (!dev->data->min_rx_buf_size ||
 		    dev->data->min_rx_buf_size > mbp_buf_size)
@@ -1097,6 +1139,49 @@ rte_eth_rx_queue_setup(uint8_t port_id, uint16_t rx_queue_id,
 	return ret;
 }
 
+/**
+ * A conversion function from txq_flags to rte_eth_txq_conf offloads API.
+ */
+static void
+rte_eth_convert_txq_flags(struct rte_eth_txq_conf *txq_conf)
+{
+	uint32_t txq_flags = txq_conf->txq_flags;
+	uint64_t *offloads = &txq_conf->offloads;
+
+	if (!(txq_flags & ETH_TXQ_FLAGS_NOMULTSEGS))
+		*offloads |= DEV_TX_OFFLOAD_MULTI_SEGS;
+	if (!(txq_flags & ETH_TXQ_FLAGS_NOVLANOFFL))
+		*offloads |= DEV_TX_OFFLOAD_VLAN_INSERT;
+	if (!(txq_flags & ETH_TXQ_FLAGS_NOXSUMSCTP))
+		*offloads |= DEV_TX_OFFLOAD_SCTP_CKSUM;
+	if (!(txq_flags & ETH_TXQ_FLAGS_NOXSUMUDP))
+		*offloads |= DEV_TX_OFFLOAD_UDP_CKSUM;
+	if (!(txq_flags & ETH_TXQ_FLAGS_NOXSUMTCP))
+		*offloads |= DEV_TX_OFFLOAD_TCP_CKSUM;
+}
+
+/**
+ * A conversion function between rte_eth_txq_conf offloads API to txq_flags
+ * offloads API.
+ */
+static void
+rte_eth_convert_txq_offloads(struct rte_eth_txq_conf *txq_conf)
+{
+	uint32_t *txq_flags = &txq_conf->txq_flags;
+	uint64_t offloads = txq_conf->offloads;
+
+	if (!(offloads & DEV_TX_OFFLOAD_MULTI_SEGS))
+		*txq_flags |= ETH_TXQ_FLAGS_NOMULTSEGS;
+	if (!(offloads & DEV_TX_OFFLOAD_VLAN_INSERT))
+		*txq_flags |= ETH_TXQ_FLAGS_NOVLANOFFL;
+	if (!(offloads & DEV_TX_OFFLOAD_SCTP_CKSUM))
+		*txq_flags |= ETH_TXQ_FLAGS_NOXSUMSCTP;
+	if (!(offloads & DEV_TX_OFFLOAD_UDP_CKSUM))
+		*txq_flags |= ETH_TXQ_FLAGS_NOXSUMUDP;
+	if (!(offloads & DEV_TX_OFFLOAD_TCP_CKSUM))
+		*txq_flags |= ETH_TXQ_FLAGS_NOXSUMTCP;
+}
+
 int
 rte_eth_tx_queue_setup(uint8_t port_id, uint16_t tx_queue_id,
 		       uint16_t nb_tx_desc, unsigned int socket_id,
@@ -1104,6 +1189,8 @@ rte_eth_tx_queue_setup(uint8_t port_id, uint16_t tx_queue_id,
 {
 	struct rte_eth_dev *dev;
 	struct rte_eth_dev_info dev_info;
+	struct rte_eth_txq_conf txq_trans_conf;
+	/* Holds translated configuration to be passed to the PMD */
 	void **txq;
 
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
@@ -1148,8 +1235,16 @@ rte_eth_tx_queue_setup(uint8_t port_id, uint16_t tx_queue_id,
 	if (tx_conf == NULL)
 		tx_conf = &dev_info.default_txconf;
 
+	txq_trans_conf = *tx_conf;
+	if ((dev->data->dev_flags & RTE_ETH_DEV_TXQ_OFFLOAD) &&
+	    (!(tx_conf->txq_flags & ETH_TXQ_FLAGS_IGNORE)))
+		rte_eth_convert_txq_flags(&txq_trans_conf);
+	else if (!(dev->data->dev_flags & RTE_ETH_DEV_TXQ_OFFLOAD) &&
+		 (tx_conf->txq_flags & ETH_TXQ_FLAGS_IGNORE))
+		rte_eth_convert_txq_offloads(&txq_trans_conf);
+
 	return (*dev->dev_ops->tx_queue_setup)(dev, tx_queue_id, nb_tx_desc,
-					       socket_id, tx_conf);
+					       socket_id, &txq_trans_conf);
 }
 
 void
-- 
2.12.0