FFPLD_MPDU_SIZE
(max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size))
/ (max_mpdu * FFPLD_MPDU_SIZE)) * 100;
((phy_rate - dma_rate) * FFPLD_MPDU_SIZE)) + 1;
if (fifo->ampdu_pld_size >= max_mpdu * FFPLD_MPDU_SIZE) {
(max_mpdu * FFPLD_MPDU_SIZE - fifo->ampdu_pld_size))
/ (max_mpdu * FFPLD_MPDU_SIZE)) * 100;