SGE_PG_RSVD
fl->buf_size - SGE_PG_RSVD, DMA_FROM_DEVICE);
q->fl[0].buf_size - SGE_PG_RSVD, 1, 0);
q->fl[i].buf_size - SGE_PG_RSVD,
SGE_PG_RSVD;
q->buf_size - SGE_PG_RSVD,