BD_PER_PAGE
#define MAX_BD_PER_PAGE ((u32_t) (BD_PER_PAGE-1))
#define USABLE_BDS_PER_PAGE(bd_size,is_chain_mode) ((u32_t) (BD_PER_PAGE(bd_size)-NUM_BDS_USED_FOR_NEXT_PTR(bd_size,is_chain_mode)))
DbgBreakIf((bd_chain->page_cnt + 1) * BD_PER_PAGE(bd_size) > 0xffff);
bd_chain->bds_per_page = BD_PER_PAGE(bd_size);
DbgBreakIf(page_cnt * BD_PER_PAGE(bd_size) > 0xffff);
bd_chain->bds_per_page = BD_PER_PAGE(bd_size);
bds_per_page = BD_PER_PAGE(LM_TPA_BD_ELEN_SIZE);