BNX2X_BTR
#define BNX2X_MAX_COALESCE_TOUT (0xff*BNX2X_BTR)
u8 ticks = usec / BNX2X_BTR;
bp->tx_ticks = (50 / BNX2X_BTR) * BNX2X_BTR;
bp->rx_ticks = (25 / BNX2X_BTR) * BNX2X_BTR;