net/vmxnet3: add Tx preparation

[dpdk.git] / drivers / net / vmxnet3 / vmxnet3_rxtx.c

diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
index b109168..3651369 100644 (file)
--- 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);
@@ -349,6 +358,53 @@ vmxnet3_tq_tx_complete(vmxnet3_tx_queue_t *txq)
        PMD_TX_LOG(DEBUG, "Processed %d tx comps & command descs.", completed);
 }
 
+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 = -ENOTSUP;
+                       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)