> > > +#ifdef RTE_ARCH_32 > > > + uint16_t cqe_incr = (uint16_t)rxq->gdma_cq.head_incr_to_short_db; > > > > How do you make sure head_incr_to_short_db doesn't overflow? > > > > I have checked this with hardware team. In my opinion it would be easily > overflown. > The hw team seems suggesting the hw will take care of this. > > Thanks, > Wei
I'm not sure how HW can take care of this when it overflows. When it happens, the HW will miss a doorbell and CQ queue will get full. And eventually you'll lose completions for TX/RX. In mana_alloc_and_post_rx_wqes() and mana_rx_burst(), the code has check for RX/TX_WQE_SHORT_DB_THRESHOLD to make sure tail_incr doesn't overflow when ringing the doorbell. In gdma_poll_completion_queue(), you need to have a similar mechanism to not overflow tail_incr when ringing the doorbell. Thanks, Long
