Vmxnet3_TxDataDesc
struct Vmxnet3_TxDataDesc *tdd;
tdd = (struct Vmxnet3_TxDataDesc *)((u8 *)tq->data_ring.base +
sizeof(struct Vmxnet3_TxDataDesc);
adapter->txdata_desc_size = sizeof(struct Vmxnet3_TxDataDesc);
struct Vmxnet3_TxDataDesc *base;