[dpdk-dev] [PATCH v13 6/7] vmxnet3: add Tx preparation

[Tomasz Kulasek <tomaszx.kulasek@intel.com>]

From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---
 drivers/net/vmxnet3/vmxnet3_ethdev.c |    4 +++
 drivers/net/vmxnet3/vmxnet3_ethdev.h |    2 ++
 drivers/net/vmxnet3/vmxnet3_rxtx.c   |   57 ++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 8bb13e5..f85be91 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -237,6 +237,7 @@ static void vmxnet3_mac_addr_set(struct rte_eth_dev *dev,
 	eth_dev->dev_ops = &vmxnet3_eth_dev_ops;
 	eth_dev->rx_pkt_burst = &vmxnet3_recv_pkts;
 	eth_dev->tx_pkt_burst = &vmxnet3_xmit_pkts;
+	eth_dev->tx_pkt_prepare = vmxnet3_prep_pkts;
 	pci_dev = eth_dev->pci_dev;
 
 	/*
@@ -326,6 +327,7 @@ static void vmxnet3_mac_addr_set(struct rte_eth_dev *dev,
 	eth_dev->dev_ops = NULL;
 	eth_dev->rx_pkt_burst = NULL;
 	eth_dev->tx_pkt_burst = NULL;
+	eth_dev->tx_pkt_prepare = NULL;
 
 	rte_free(eth_dev->data->mac_addrs);
 	eth_dev->data->mac_addrs = NULL;
@@ -728,6 +730,8 @@ static void vmxnet3_mac_addr_set(struct rte_eth_dev *dev,
 		.nb_max = VMXNET3_TX_RING_MAX_SIZE,
 		.nb_min = VMXNET3_DEF_TX_RING_SIZE,
 		.nb_align = 1,
+		.nb_seg_max = UINT8_MAX,
+		.nb_mtu_seg_max = VMXNET3_MAX_TXD_PER_PKT,
 	};
 
 	dev_info->rx_offload_capa =
diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.h b/drivers/net/vmxnet3/vmxnet3_ethdev.h
index 7d3b11e..469db71 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.h
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.h
@@ -171,5 +171,7 @@ uint16_t vmxnet3_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
 			   uint16_t nb_pkts);
 uint16_t vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 			   uint16_t nb_pkts);
+uint16_t vmxnet3_prep_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
+			uint16_t nb_pkts);
 
 #endif /* _VMXNET3_ETHDEV_H_ */
diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index b109168..0c35738 100644
--- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
+++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
@@ -69,6 +69,7 @@
 #include <rte_sctp.h>
 #include <rte_string_fns.h>
 #include <rte_errno.h>
+#include <rte_net.h>
 
 #include "base/vmxnet3_defs.h"
 #include "vmxnet3_ring.h"
@@ -76,6 +77,14 @@
 #include "vmxnet3_logs.h"
 #include "vmxnet3_ethdev.h"
 
+#define	VMXNET3_TX_OFFLOAD_MASK	( \
+		PKT_TX_VLAN_PKT | \
+		PKT_TX_L4_MASK |  \
+		PKT_TX_TCP_SEG)
+
+#define	VMXNET3_TX_OFFLOAD_NOTSUP_MASK	\
+	(PKT_TX_OFFLOAD_MASK ^ VMXNET3_TX_OFFLOAD_MASK)
+
 static const uint32_t rxprod_reg[2] = {VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2};
 
 static int vmxnet3_post_rx_bufs(vmxnet3_rx_queue_t*, uint8_t);
@@ -350,6 +359,54 @@
 }
 
 uint16_t
+vmxnet3_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
+	uint16_t nb_pkts)
+{
+	int32_t ret;
+	uint32_t i;
+	uint64_t ol_flags;
+	struct rte_mbuf *m;
+
+	for (i = 0; i != nb_pkts; i++) {
+		m = tx_pkts[i];
+		ol_flags = m->ol_flags;
+
+		/*
+		 * Non-TSO packet cannot occupy more than
+		 * VMXNET3_MAX_TXD_PER_PKT TX descriptors.
+		 */
+		if ((ol_flags & PKT_TX_TCP_SEG) == 0 &&
+				m->nb_segs > VMXNET3_MAX_TXD_PER_PKT) {
+			rte_errno = -EINVAL;
+			return i;
+		}
+
+		/* check that only supported TX offloads are requested. */
+		if ((ol_flags & VMXNET3_TX_OFFLOAD_NOTSUP_MASK) != 0 ||
+				(ol_flags & PKT_TX_L4_MASK) ==
+				PKT_TX_SCTP_CKSUM) {
+			rte_errno = -EINVAL;
+			return i;
+		}
+
+#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+		ret = rte_validate_tx_offload(m);
+		if (ret != 0) {
+			rte_errno = ret;
+			return i;
+		}
+#endif
+		ret = rte_net_intel_cksum_prepare(m);
+		if (ret != 0) {
+			rte_errno = ret;
+			return i;
+		}
+	}
+
+	return i;
+}
+
+uint16_t
 vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		  uint16_t nb_pkts)
 {
-- 
1.7.9.5