VNET_8K
ldcp->tx_data_sz = (data_sz * ldcp->num_txds) + VNET_8K;
dp->data_sz = (vsw_num_descriptors * data_sz) + VNET_8K;
#define VNET_12K ((VNET_8K) + (VNET_4K))
#define VNET_ROUNDUP_8K(n) (((n) + (VNET_8K - 1)) & ~(VNET_8K - 1))