ixgb_tx_desc
(sizeof(struct ixgb_tx_desc)) * sc->num_tx_desc);
sizeof(struct ixgb_tx_desc));
struct ixgb_tx_desc *tx_desc;
tsize = IXGB_ROUNDUP(sc->num_tx_desc * sizeof(struct ixgb_tx_desc),
IXGB_MAX_TXD * sizeof(struct ixgb_tx_desc));
sc->tx_desc_base = (struct ixgb_tx_desc *) sc->txdma.dma_vaddr;
struct ixgb_tx_desc *current_tx_desc = NULL;
struct ixgb_tx_desc *tx_desc_base;