[dpdk-dev,2/4] vmxnet3: add tx l4 cksum offload
Commit Message
Support TCP/UDP checksum offload.
Signed-off-by: Yong Wang <yongwang@vmware.com>
---
doc/guides/rel_notes/release_2_3.rst | 3 +++
drivers/net/vmxnet3/vmxnet3_rxtx.c | 35 ++++++++++++++++++++++++++++-------
2 files changed, 31 insertions(+), 7 deletions(-)
@@ -20,6 +20,9 @@ Drivers
Tx data ring has been shown to improve small pkt forwarding performance
on vSphere environment.
+* **vmxnet3: add tx l4 cksum offload.**
+
+ Support TCP/UDP checksum offload.
Libraries
~~~~~~~~~
@@ -332,6 +332,8 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_tx;
vmxnet3_tx_queue_t *txq = tx_queue;
struct vmxnet3_hw *hw = txq->hw;
+ Vmxnet3_TxQueueCtrl *txq_ctrl = &txq->shared->ctrl;
+ uint32_t deferred = rte_le_to_cpu_32(txq_ctrl->txNumDeferred);
if (unlikely(txq->stopped)) {
PMD_TX_LOG(DEBUG, "Tx queue is stopped.");
@@ -413,21 +415,40 @@ vmxnet3_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
gdesc->txd.tci = txm->vlan_tci;
}
- /* TODO: Add transmit checksum offload here */
+ if (txm->ol_flags & PKT_TX_L4_MASK) {
+ gdesc->txd.om = VMXNET3_OM_CSUM;
+ gdesc->txd.hlen = txm->l2_len + txm->l3_len;
+
+ switch (txm->ol_flags & PKT_TX_L4_MASK) {
+ case PKT_TX_TCP_CKSUM:
+ gdesc->txd.msscof = gdesc->txd.hlen + offsetof(struct tcp_hdr, cksum);
+ break;
+ case PKT_TX_UDP_CKSUM:
+ gdesc->txd.msscof = gdesc->txd.hlen + offsetof(struct udp_hdr, dgram_cksum);
+ break;
+ default:
+ PMD_TX_LOG(WARNING, "requested cksum offload not supported %#x",
+ txm->ol_flags & PKT_TX_L4_MASK);
+ abort();
+ }
+ } else {
+ gdesc->txd.hlen = 0;
+ gdesc->txd.om = VMXNET3_OM_NONE;
+ gdesc->txd.msscof = 0;
+ }
+
+ txq_ctrl->txNumDeferred = rte_cpu_to_le_32(++deferred);
/* flip the GEN bit on the SOP */
rte_compiler_barrier();
gdesc->dword[2] ^= VMXNET3_TXD_GEN;
-
- txq->shared->ctrl.txNumDeferred++;
nb_tx++;
}
- PMD_TX_LOG(DEBUG, "vmxnet3 txThreshold: %u", txq->shared->ctrl.txThreshold);
-
- if (txq->shared->ctrl.txNumDeferred >= txq->shared->ctrl.txThreshold) {
+ PMD_TX_LOG(DEBUG, "vmxnet3 txThreshold: %u", rte_le_to_cpu_32(txq_ctrl.txThreshold));
- txq->shared->ctrl.txNumDeferred = 0;
+ if (deferred >= rte_le_to_cpu_32(txq_ctrl->txThreshold)) {
+ txq_ctrl->txNumDeferred = 0;
/* Notify vSwitch that packets are available. */
VMXNET3_WRITE_BAR0_REG(hw, (VMXNET3_REG_TXPROD + txq->queue_id * VMXNET3_REG_ALIGN),
txq->cmd_ring.next2fill);